JPH03117736A - Bound bumper for automobile - Google Patents
Bound bumper for automobileInfo
- Publication number
- JPH03117736A JPH03117736A JP25343389A JP25343389A JPH03117736A JP H03117736 A JPH03117736 A JP H03117736A JP 25343389 A JP25343389 A JP 25343389A JP 25343389 A JP25343389 A JP 25343389A JP H03117736 A JPH03117736 A JP H03117736A
- Authority
- JP
- Japan
- Prior art keywords
- bumper
- rubber
- annulus ring
- guide member
- ring parts
- 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.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 30
- 239000005060 rubber Substances 0.000 claims abstract description 30
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 239000006096 absorbing agent Substances 0.000 abstract description 4
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- 230000035939 shock Effects 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000001788 irregular Effects 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 210000004907 gland Anatomy 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- UAIXRPCCYXNJMQ-RZIPZOSSSA-N buprenorphine hydrochlorie Chemical compound [Cl-].C([C@]12[C@H]3OC=4C(O)=CC=C(C2=4)C[C@@H]2[C@]11CC[C@]3([C@H](C1)[C@](C)(O)C(C)(C)C)OC)C[NH+]2CC1CC1 UAIXRPCCYXNJMQ-RZIPZOSSSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、自動車のサスペンションに施用されるバウン
ドバンパに関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a bound bumper applied to a suspension of an automobile.
従来の技術
周知のように、スラット型サスペンションにあっては、
例えば第４図に示すように、ショックアブソーバ１のシ
リンダ外筒２の一端側から図外のシール部材を介して内
部に液密的に挿通したピストンロッド３の上端側に、ウ
レタン製または合成コム製ノパンパラハーヲ備えたバウ
ンドバンパ４が設けられている（例えば実開昭５９−１
４７９３６号公報等参照）。As is well known in the art, in slat type suspensions,
For example, as shown in FIG. 4, a urethane or synthetic comb is attached to the upper end of a piston rod 3 that is fluid-tightly inserted from one end of the cylinder outer cylinder 2 of the shock absorber 1 through a sealing member (not shown). A bound bumper 4 is provided with a manufactured nopan parahaw (for example, the
(See Publication No. 47936, etc.).
このバウンドバンパ４は、バンパラバー５の内部中央軸
方向に前記ピストンロッド３の挿通孔５ａが形成されて
いると共に、バンパラバー５の外周には、環状の複数の
窪部６・・・を介して複数の円環状突起部７・・・が多
段状に形成されている。This bound bumper 4 has an insertion hole 5a for the piston rod 3 formed in the direction of the inner central axis of the bumper rubber 5, and a plurality of annular recesses 6 formed on the outer periphery of the bumper rubber 5. The annular projections 7 are formed in multiple stages.
そして、車両のバウンド時などにシリンダ外筒２との相
対関係でピストンロッド３が圧側方向にストローク移動
すると、バンパラバー５はアッパスプリングシート８と
シリンダ外筒２に有する円盤状のグランドパツキン２ａ
との間で圧縮されて圧縮方向の荷重が作用し、第５図に
示すようにまず各窪部６・・−が夫々潰れて隣接する各
突起部７・・・同志が互いに接触し、続いて各突起部７
・・・が圧縮変形を開始する。これによって効果的な緩
衝作用が得られるようになっている。When the piston rod 3 strokes in the compression side direction relative to the cylinder outer cylinder 2 when the vehicle bounces, etc., the bumper lever 5 is moved between the upper spring seat 8 and the disc-shaped gland packing 2a provided on the cylinder outer cylinder 2.
As shown in FIG. 5, the recesses 6...- are crushed and the adjacent protrusions 7 come into contact with each other, and then, as shown in FIG. each protrusion 7
... starts compressive deformation. This provides an effective buffering effect.
発明が解決しようとする課題
然し乍ら、前記従来のバウンドバンパ４にあっては、バ
ンパラバー５が一般的に合成ゴムやウレタン等の柔軟な
材料で成形されているため、前述のような圧縮変形時に
おいても第５図に示すように上下方向へ波形状に変形し
て各円環部７・・・が互いに位置ズレを起こす虞がある
。したがって、各窪部６・・・の薄肉な内周壁６ａ付近
に筒部的な集中応力が発生して該内周壁６ａに経時時に
亀裂が生じて破損するなど耐久性が著しく低下する。Problems to be Solved by the Invention However, in the conventional bound bumper 4, since the bumper rubber 5 is generally molded from a flexible material such as synthetic rubber or urethane, the bumper rubber 5 is generally molded from a flexible material such as synthetic rubber or urethane. As shown in FIG. 5, there is a possibility that the annular portions 7 may be deformed into a wave shape in the vertical direction, causing the respective annular portions 7 to be displaced from each other. Therefore, cylindrical concentrated stress occurs near the thin inner circumferential wall 6a of each recess 6, and the inner circumferential wall 6a cracks and breaks over time, resulting in a significant decrease in durability.
また、バンパラバー５の前記不規則な変形の発生により
、安定かつ所望のばね特性が得られないといった問題が
ある。Further, due to the irregular deformation of the bumper rubber 5, there is a problem that stable and desired spring characteristics cannot be obtained.
課題を解決するための手段
本発明は、前記従来のバウンドバンパの問題点に鑑みて
案出されたもので、バンパラバーの中央軸方向にピスト
ンロッド挿通孔を有すると共に、外周に複数の窪部を介
して多段状の円環部を有するバウンドバンパにおいて、
前記各円環部の外周に、前記バンパラバーの圧縮変形時
に各円環部の外周面を案内する略円筒状のガイド部材を
設けたことを特徴としている。Means for Solving the Problems The present invention was devised in view of the problems of the conventional bound bumper, and has a piston rod insertion hole in the central axis direction of the bumper rubber and a plurality of recesses on the outer periphery. In a bound bumper having a multi-stage annular portion through the bumper,
The present invention is characterized in that a substantially cylindrical guide member is provided on the outer periphery of each annular portion to guide the outer peripheral surface of each annular portion when the bumper rubber is compressed and deformed.
作用
前記構成の本発明によれば、バンパラバーの圧縮変形時
において、該バンパラバーが上下方向に波形状に不規則
に変形して各円環部も互いに径方向へ位置ズレを玉じよ
うとすると、該円環部の外周面をガイド部材の内周面で
規制して径方向の位置ズレを防止する。したがって、バ
ンパラバー全体が略真直な姿勢で圧縮変形することがで
きる。According to the present invention having the above configuration, when the bumper rubber is compressively deformed, when the bumper rubber is irregularly deformed in a wave shape in the vertical direction and the respective annular portions also try to shift their positions in the radial direction, The outer circumferential surface of the annular portion is regulated by the inner circumferential surface of the guide member to prevent positional deviation in the radial direction. Therefore, the entire bumper lever can be compressed and deformed in a substantially straight posture.
実施例
以下、本発明の各実施例を図面に基づいて詳述する。尚
、従来と共通の構成個所には同一の符号を付して説明す
る。EXAMPLES Below, each example of the present invention will be described in detail based on the drawings. Incidentally, the same reference numerals are attached to the same components as in the prior art in the explanation.
第１図及び第２図は本発明に係る自動車用バウンドバン
パの第１実施例を示している。すなわち、■はショック
アブソーバ、２はシリンダ外筒、３はピストンロッド、
４はバウンドバンパであって、このバウンドバンパ４は
、バンパラバー５がウレタン材で一体成形され、内部中
央軸方向にショックアブソーバ１のピストンロッド３が
挿通する挿通孔５ａが形成されていると共に、外周には
環状の３つの窪部６・・・を介して４つの円環部７・・
・が多段状に設けられている。1 and 2 show a first embodiment of a bound bumper for an automobile according to the present invention. In other words, ■ is the shock absorber, 2 is the cylinder outer cylinder, 3 is the piston rod,
Reference numeral 4 denotes a bound bumper, in which a bumper rubber 5 is integrally molded with a urethane material, an insertion hole 5a through which the piston rod 3 of the shock absorber 1 is inserted is formed in the direction of the inner central axis, and an outer periphery. The four annular portions 7... are inserted through the three annular depressions 6...
- are provided in multiple stages.
そして、バンパラバー５の外周には、有蓋円筒状のガイ
ド部材１１が被装されている。このガイド部材１１は、
硬質樹脂材あるいは金属材で一体成形され、バンパラバ
ー５の外周側に位置する筒状本体１２と、バンパラバー
５の最上位の円環部７上面に当接する円板部１３とから
なり、この円板部１３の中央にはピストンロッド３が挿
通する開口部１３ａが形成されている。また、前記筒状
本体１２は、上端部１２ａが最上位の円環部７・・・外
周面に前記円板部１３と一緒に嵌着固定されており、そ
の内径が下位の円環部７・・・外径よりも若干大きく設
定されて、バンパラバー５の伸長時に内周面１２ｂと下
位円環部７・・・外周面７ａとの間に一定のクリアラン
スＣが形成されている。更に、筒状本体１２の軸方向長
さは、バンパラバー５の最大伸長時の長さよりも若干長
（設定され、下端部１２ｃがシリンダ２の上端部に有す
るグランドパツキン２ａ下方まで延設されている。また
、この下端部１２ｃ内周面１２ｂとグランドパッキン２
ａ外周縁との間に干渉防止用の隙間Ｓが形成されている
。The outer periphery of the bumper rubber 5 is covered with a covered cylindrical guide member 11 . This guide member 11 is
It consists of a cylindrical main body 12 that is integrally molded from a hard resin material or a metal material and is located on the outer peripheral side of the bumper rubber 5, and a disc part 13 that comes into contact with the upper surface of the uppermost annular part 7 of the bumper rubber 5. An opening 13a through which the piston rod 3 is inserted is formed in the center of the portion 13. Further, the cylindrical main body 12 has an upper end 12a fitted and fixed to the outer circumferential surface of the uppermost annular part 7 together with the disc part 13, and an inner diameter of which is fixed to the outer circumferential surface of the uppermost annular part 7. ... is set slightly larger than the outer diameter, and a certain clearance C is formed between the inner circumferential surface 12b and the lower annular portion 7...the outer circumferential surface 7a when the bumper rubber 5 is extended. Furthermore, the axial length of the cylindrical body 12 is set to be slightly longer than the length of the bumper rubber 5 at its maximum extension, and the lower end 12c extends below the gland packing 2a provided at the upper end of the cylinder 2. In addition, this lower end portion 12c inner circumferential surface 12b and the gland packing 2
A gap S for preventing interference is formed between the outer peripheral edge a and the outer peripheral edge.
したがって、この実施例によれば、車両走行中のバウン
ド時なｅにおいてシリンダ２とピストンロッド３とが相
対的に圧縮移動してバンパラバー５に圧縮荷重が作用す
ると、第２図に示すように各窪部６・・・が潰れてバン
パラバー５が圧縮変形しつつ上下方向に波形状に不規則
に変形し各円環部７・・・も互いに径方向へ位置ズレを
生じようとすると、該冬用環部７・・・の径方向へ突出
変形した外周面７ａ・・・をガイド部材１１の筒状本体
１２内周而１２ａが内方へ規制して位置ズレを防止する
。したがって、各円環部７・・・が規則的に重合して圧
縮変形し、バンパラバー５全体が真直ぐな姿勢で規則的
に圧縮変形する。この結果、窪部６・・・の内周面６ａ
付近に対する集中応力が防止される。Therefore, according to this embodiment, when the cylinder 2 and the piston rod 3 are compressed relative to each other at the time of bouncing while the vehicle is running, and a compressive load is applied to the bumper lever 5, each When the depressions 6 are crushed and the bumper rubber 5 is compressed and deformed irregularly in a wave shape in the vertical direction, and the annular parts 7 also tend to shift in position from each other in the radial direction, The inner periphery 12a of the cylindrical main body 12 of the guide member 11 inwardly restricts the outer peripheral surfaces 7a of the ring portions 7 that are deformed in the radial direction to prevent displacement. Therefore, the respective annular portions 7 are regularly superimposed and compressively deformed, and the entire bumper rubber 5 is regularly compressively deformed in a straight posture. As a result, the inner peripheral surface 6a of the recess 6...
Concentrated stress on nearby areas is prevented.
尚、バンパラバー５の伸長時において円環部７・・・と
筒状本体１２との間にクリアランスＣが形成されている
ため、バンパラバー５の圧縮変形初期の円環部７・・・
の径方向の変形が筒状本体１２によって規制されない。In addition, since the clearance C is formed between the annular part 7 and the cylindrical main body 12 when the bumper rubber 5 is extended, the annular part 7 in the initial stage of compression deformation of the bumper rubber 5.
The radial deformation of is not restricted by the cylindrical body 12.
したがって、圧縮変形初期におけるばね特性の急激な立
上りを防止できる。Therefore, it is possible to prevent a sudden rise in spring characteristics at the initial stage of compression deformation.
第３図は、本発明の第２実施例を示し、この実施例では
ガイド部材１１を単に筒状本体２２のみで構成し、その
上端部２２ａ内周面を最上位の円環部７外周面に接着剤
によって固定するかあるいは圧入により固定するように
なっている。したがって、この実施例も第１実施例と同
様な作用効果が得られることは勿論のこと、筒状本体２
２のみとしたため、その製造作業が簡単になるばかりか
、バンパラバー５上端に配置されるアッパスプリングシ
ートの取付性も良好になる。FIG. 3 shows a second embodiment of the present invention, in which the guide member 11 is simply composed of a cylindrical body 22, and the inner circumferential surface of the upper end portion 22a is the outer circumferential surface of the uppermost annular portion 7. It is fixed by adhesive or by press-fitting. Therefore, it goes without saying that this embodiment also provides the same effects as the first embodiment, and also that the cylindrical body 2
Since only 2 is used, the manufacturing work is not only simplified, but also the upper spring seat arranged at the upper end of the bumper lever 5 can be easily attached.
発明の効果
以上の説明で明らかなように、本発明に係る自動車用バ
ウンドバンパによれば、とりわけ各円環部の外周に、パ
ンバラバーの圧縮変形時に各円環部の外周面を案内する
略円筒状のガイド部材を設けたため、各円環部の径方向
の位装置ズレが規制されてパンバラバー全体が上下方向
へ略真直ぐな姿勢で圧縮変形する。この結果、各窪部内
周壁付近に対する集中応力の発生が防止されて該内周壁
付近の亀裂や破損が防止され、耐久性の向上が図れる。Effects of the Invention As is clear from the above description, according to the automobile bound bumper according to the present invention, a substantially cylindrical cylinder is provided on the outer periphery of each annular portion, which guides the outer circumferential surface of each annular portion during compressive deformation of the pan bar. Since the shaped guide member is provided, the displacement of the radial position of each annular portion is restricted, and the entire panbara rubber is compressed and deformed in the vertical direction in a substantially straight posture. As a result, the occurrence of concentrated stress near the inner circumferential wall of each recess is prevented, and cracks and damage near the inner circumferential wall are prevented, thereby improving durability.
また、パンバラバーの安定かつ所望のばね特性を得るこ
とができる。Moreover, stable and desired spring characteristics of the pan-balance rubber can be obtained.
第１図は本発明の第１実施例を示す断面図、第２図は本
実施例の作用を示す断面図、第３図は本発明の第２実施
例を示す断面図、第４図は従来のバウンドバンパを示す
断面図、第５図は同従来の作用を示す断面図である。
４・・・バウンドバンパ、５・・・バンパラバー、５ａ
・・・ピストンロッド挿通孔、６・・・窪部、７・・・
円環部、７ａ・・・外周面、１１・・・ガイド部材。
７ 円環部
第４図FIG. 1 is a sectional view showing the first embodiment of the present invention, FIG. 2 is a sectional view showing the operation of this embodiment, FIG. 3 is a sectional view showing the second embodiment of the invention, and FIG. FIG. 5 is a cross-sectional view showing a conventional bound bumper, and FIG. 5 is a cross-sectional view showing the operation of the conventional bounce bumper. 4...Bound bumper, 5...Bumper rubber, 5a
...Piston rod insertion hole, 6...Recess, 7...
Annular portion, 7a...outer peripheral surface, 11...guide member. 7 Annular part Figure 4
Claims (1)
孔を有すると共に、外周に複数の窪部を介して多段状の
円環部を有する自動車用バウンドバンパにおいて、前記
各円環部の外周に、前記バンパラバーの圧縮変形時に各
円環部の外周面を案内する略円筒状のガイド部材を設け
たことを特徴とする自動車用バウンドバンパ。(1) A bound bumper for an automobile that has a piston rod insertion hole in the direction of the central axis of the bumper rubber and has a multi-stage annular portion on the outer periphery via a plurality of recesses. A bound bumper for an automobile, characterized in that a substantially cylindrical guide member is provided for guiding the outer peripheral surface of each annular portion when the bumper rubber is compressed and deformed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25343389A JPH03117736A (en) | 1989-09-28 | 1989-09-28 | Bound bumper for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25343389A JPH03117736A (en) | 1989-09-28 | 1989-09-28 | Bound bumper for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03117736A true JPH03117736A (en) | 1991-05-20 |
Family
ID=17251332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25343389A Pending JPH03117736A (en) | 1989-09-28 | 1989-09-28 | Bound bumper for automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03117736A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2747754A1 (en) * | 1996-04-19 | 1997-10-24 | Caoutchouc Manuf Plastique | Vehicle shock absorber protection bellows stop travel limiter |
| EP0985848A1 (en) * | 1998-08-14 | 2000-03-15 | Burford Trading Limited | Stroke limitation spring assembly for a motor-vehicle suspension and method for manufacturing the same |
| US6296237B1 (en) * | 1998-11-24 | 2001-10-02 | Tokai Rubber Industries, Ltd. | Bump stopper |
| WO2004097250A1 (en) * | 2003-04-29 | 2004-11-11 | Basf Aktiengesellschaft | Automobile shock absorber systems |
| JP2008051155A (en) * | 2006-08-22 | 2008-03-06 | Honda Motor Co Ltd | Stopper device |
| JP2008151584A (en) * | 2006-12-15 | 2008-07-03 | Tlv Co Ltd | Temperature indicator |
-
1989
- 1989-09-28 JP JP25343389A patent/JPH03117736A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2747754A1 (en) * | 1996-04-19 | 1997-10-24 | Caoutchouc Manuf Plastique | Vehicle shock absorber protection bellows stop travel limiter |
| EP0888910A1 (en) * | 1996-04-19 | 1999-01-07 | Caoutchouc Manufacture Et Plastiques | Bump stop working in conjunction with protective bellows,especially for vehicle dampers |
| EP0985848A1 (en) * | 1998-08-14 | 2000-03-15 | Burford Trading Limited | Stroke limitation spring assembly for a motor-vehicle suspension and method for manufacturing the same |
| US6296237B1 (en) * | 1998-11-24 | 2001-10-02 | Tokai Rubber Industries, Ltd. | Bump stopper |
| WO2004097250A1 (en) * | 2003-04-29 | 2004-11-11 | Basf Aktiengesellschaft | Automobile shock absorber systems |
| JP2008051155A (en) * | 2006-08-22 | 2008-03-06 | Honda Motor Co Ltd | Stopper device |
| JP2008151584A (en) * | 2006-12-15 | 2008-07-03 | Tlv Co Ltd | Temperature indicator |
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