JP2003056630A - Cover-integral construction of gas spring - Google Patents
Cover-integral construction of gas springInfo
- Publication number
- JP2003056630A JP2003056630A JP2001246051A JP2001246051A JP2003056630A JP 2003056630 A JP2003056630 A JP 2003056630A JP 2001246051 A JP2001246051 A JP 2001246051A JP 2001246051 A JP2001246051 A JP 2001246051A JP 2003056630 A JP2003056630 A JP 2003056630A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- cover
- gas spring
- cylinder cover
- convex portion
- 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.)
- Granted
Links
Landscapes
- Fluid-Damping Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車のバックド
ア開閉用、またはビルディングの窓の開閉用等に適する
ガススプリングの改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a gas spring suitable for opening and closing a back door of an automobile or opening and closing a window of a building.
【０００２】[0002]
【従来の技術】一般に自動車の後方には、例えば、トラ
ンクを開閉するための跳ね上げ式のバックドアが、開閉
自在に設けられている。このバックドアは、車体との間
に常時伸び方向に付勢するように張架されるガススプリ
ングによって開閉操作される。2. Description of the Related Art Generally, a flip-up type back door for opening and closing a trunk is provided at the rear of an automobile so as to be openable and closable. The back door is opened and closed by a gas spring stretched between the back door and the vehicle body so as to always urge the back door in the extending direction.
【０００３】また、このガススプリングとしては、シリ
ンダとシリンダ内にピストンを介して移動自在に挿入さ
れると共にシリンダ内のガス圧で常時伸び方向に付勢さ
れているピストンロッドとを備え、さらに、ピストンロ
ッドを保護するために、その内周にシリンダカバーが設
けられているものが開発されている。The gas spring includes a cylinder and a piston rod which is movably inserted into the cylinder via a piston and is constantly urged in the extending direction by the gas pressure in the cylinder. In order to protect the piston rod, a cylinder cover has been developed on its inner circumference.
【０００４】即ち、バックドアを開いて貨物を乗降させ
る際、または走行中に積荷が転倒する等の際に、ピスト
ンロッドに衝突することによってピストンロッドが変形
して作動不能になることがある。このような事故からピ
ストンロッドを保護するためにシリンダカバーが設けら
れている。更にシリンダの保護や外観上からシリンダの
外周にヒシチューブを挿入している場合もある。That is, when the back door is opened to load or unload cargo, or when the cargo falls during traveling, the piston rod may be deformed and become inoperable due to collision with the piston rod. A cylinder cover is provided to protect the piston rod from such an accident. In addition, a cylinder tube may be inserted around the outer circumference of the cylinder for protection of the cylinder and appearance.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
ようなガススプリングでは、シリンダカバーはピストン
の作動に伴いシリンダの外周に沿って移動するので、シ
リンダカバー内周部がシリンダ外周部に接触して作動が
円滑に行えなくなることを防止するため、これらの間に
所定の隙間を設けている。この隙間を大きくすると、シ
リンダカバーの作動を円滑に行える反面、最圧縮端に位
置した状態、即ち、バックドアを閉じた状態で車体側か
らの振動が伝わると、シリンダカバーがシリンダに当た
って打音を発生するという問題がある。However, in the gas spring described above, the cylinder cover moves along the outer circumference of the cylinder as the piston operates, so that the inner circumference of the cylinder cover comes into contact with the outer circumference of the cylinder. A predetermined gap is provided between them in order to prevent smooth operation. If this gap is increased, the cylinder cover can be operated smoothly, but when the vibration from the vehicle body is transmitted while the cylinder cover is located at the most compressed end, that is, with the back door closed, the cylinder cover hits the cylinder and produces a tapping sound. There is a problem that it occurs.
【０００６】このため、シリンダの最圧縮端外周にビニ
ールテープを巻回してその部分の径を大きくすることに
より、上記の隙間を詰め、打音の低減を行っている。Therefore, by winding a vinyl tape around the outermost compression end of the cylinder to increase the diameter of the vinyl tape, the above-mentioned gap is closed and the tapping sound is reduced.
【０００７】ところが、上記の方法によると、ビニール
テープがシリンダの全周に巻回されるので、製造誤差等
や、熱膨張によりビニールテープ部分の径が設定値より
大きくなると、この部分にシリンダカバーが入らない不
具合や、接触部分の摩耗により上記の隙間が逆に大きく
なって打音を発生するという問題点がある。However, according to the above method, since the vinyl tape is wound around the entire circumference of the cylinder, if the diameter of the vinyl tape portion becomes larger than the set value due to manufacturing errors or thermal expansion, the cylinder cover will be covered on this portion. However, there is a problem that the above gap is conversely increased due to wear of contact holes and wear of the contact portion to generate a tapping sound.
【０００８】同様にシリンダの外周にヒシテープを挿入
し、シリンダの最圧縮端外周とヒシテープとの間にビニ
ールテープを介在させてその部分を大きくした場合でも
同じ不具合が発生する。Similarly, the same problem occurs when inserting a tape tape on the outer circumference of the cylinder and enlarging the vinyl tape between the outermost compression end of the cylinder and the tape tape to enlarge the area.
【０００９】そこで、本発明の目的は、最圧縮時におけ
るシリンダカバーとシリンダとの間の接触部の間隔を常
に一定にでき、併せてこの接触部材における摩耗という
問題を解消でき、製造管理がし易く、異音の発生も防止
できるガススプリングのカバー体構造を提供することで
ある。Therefore, an object of the present invention is to keep the interval of the contact portion between the cylinder cover and the cylinder at the time of the most compression constant, and at the same time, to eliminate the problem of wear of the contact member and to control the production. An object of the present invention is to provide a cover body structure for a gas spring that is easy and can prevent the generation of abnormal noise.
【００１０】[0010]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の手段は、シリンダと、シリンダ内にピスト
ンを介して移動自在に挿入されると共にガス圧で常時伸
び方向に付勢されているピストンロッドと、ピストンロ
ッドと連動しながらシリンダの外側を覆うシリンダカバ
ーとを備えたガススプリングにおいて、最圧縮時にシリ
ンダカバーの下端部が対向するシリンダの部位に半径方
向に膨出する凸部を形成し、最圧縮時にシリンダカバー
の下端部内周を前記凸部の外面に当接させることを特徴
とするものである。In order to achieve the above object, the means of the present invention includes a cylinder, a cylinder movably inserted through a piston, and a gas pressure constantly urged in the extending direction. In a gas spring having a piston rod that is installed and a cylinder cover that covers the outside of the cylinder while interlocking with the piston rod, a convex portion that bulges in the radial direction at the portion of the cylinder where the lower end portion of the cylinder cover faces at the time of maximum compression. Is formed, and the inner periphery of the lower end portion of the cylinder cover is brought into contact with the outer surface of the convex portion at the time of maximum compression.
【００１１】この場合、シリンダカバーの下端内周にガ
イドブッシュを設け、シリンダカバーの最圧縮ストロー
ク時に前記ガイドブッシュが対向するシリンダの部位に
凸部を設け、最圧縮時にガイドブッシュの内周を前記凸
部の外面に係合させるようにしているのが好ましい。In this case, a guide bush is provided on the inner circumference of the lower end of the cylinder cover, and a convex portion is provided on the portion of the cylinder which the guide bush opposes at the time of maximum compression stroke of the cylinder cover. It is preferable to engage with the outer surface of the convex portion.
【００１２】同じく、前記凸部が円周方向に１つ又は複
数個隔設されていても良い。Similarly, one or a plurality of the convex portions may be provided in the circumferential direction.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態につい
て、図面を参照して詳細に説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１４】図１において、ガススプリングＡは従来と
同じく、シリンダ１とシリンダ１内にピストンロッド３
を介して移動自在に挿入されると共にガス室Ｂのガス圧
で常時伸び方向に付勢されたピストンロッド３とを有し
ている。シリンダ１とピストンロッド３とは外端のブラ
ケット４ａ，４ｂを介して車両の車体とバックドア間に
架設されるようになっている。ピストンロッド３にはシ
リンダ１の外周を覆うシリンダカバー５を結合してい
る。更にシリンダの外周には弾性なヒシチューブ６が被
覆されている。但し、このヒシチューブ６は無くても良
い。In FIG. 1, the gas spring A is a cylinder 1 and a piston rod 3 in the cylinder 1 as in the conventional case.
It has a piston rod 3 which is movably inserted through and is constantly urged in the extension direction by the gas pressure of the gas chamber B. The cylinder 1 and the piston rod 3 are constructed to be installed between the vehicle body and the back door of the vehicle via brackets 4a and 4b at the outer ends. A cylinder cover 5 that covers the outer circumference of the cylinder 1 is connected to the piston rod 3. Further, the outer circumference of the cylinder is covered with an elastic tube 6. However, this Hishi tube 6 may be omitted.
【００１５】このガススプリングＡにおいて、本発明で
は、最圧縮時にシリンダカバー５の下端、又はこの下端
に設けたガイドブッシュ５ａが対向するシリンダ１の部
位に半径方向に膨出する凸部１ａを形成し、最圧縮時の
シリンダカバー５の下端部又はガイドブッシュ５ａをこ
の凸部１ａの外面に当接させるようにしている。In this gas spring A, according to the present invention, the convex portion 1a that bulges in the radial direction is formed at the lower end of the cylinder cover 5 or at the portion of the cylinder 1 facing the guide bush 5a provided at this lower end at the time of maximum compression. The lower end of the cylinder cover 5 or the guide bush 5a at the time of the most compression is brought into contact with the outer surface of the convex portion 1a.
【００１６】即ち、図２に示すように、ピストンロッド
３が最圧縮端に移動したとき、ガイドブッシュ５ａとシ
リンダ１の凸部１ａとが係合する。この場合において、
本発明では、シリンダ１に膨出部を施すことにより、そ
の外周に部分的に外方に膨出する凸部１ａが形成されて
いる。必要によりシリンダ１の外周を塩化ビニール製の
熱収縮チューブ等の弾性なチューブ６で覆うと共にシリ
ンダカバー５の最圧縮端で、ガイドブッシュ５ａと凸部
１ａとを、弾性なチューブ６を介して嵌合させるように
構成しても良い。そして、ガイドブッシュ５ａの内径
を、シリンダカバー５の内径よりも小径に形成してあ
る。That is, as shown in FIG. 2, when the piston rod 3 moves to the most compressed end, the guide bush 5a and the convex portion 1a of the cylinder 1 engage with each other. In this case,
In the present invention, by providing the cylinder 1 with a bulging portion, a convex portion 1a that partially bulges outward is formed on the outer periphery thereof. If necessary, the outer periphery of the cylinder 1 is covered with an elastic tube 6 such as a heat-shrinkable tube made of vinyl chloride, and the guide bush 5a and the convex portion 1a are fitted through the elastic tube 6 at the most compressed end of the cylinder cover 5. You may comprise so that it may be made to match. The inner diameter of the guide bush 5a is smaller than the inner diameter of the cylinder cover 5.
【００１７】このように、シリンダ１の凸部１ａとその
外周を覆うチューブ６とを、ガイドブッシュ５ａの内周
に嵌合させてあるから、凸部１ａが無い状態で嵌合する
場合よりも、嵌合寸法のバラツキに対して自由度が生
じ、良好な嵌合状態を維持することが出来るようにな
る。なお、凸部１ａは、一箇所に限らず円周方向に沿っ
て複数箇所に形成されていても良い。As described above, since the convex portion 1a of the cylinder 1 and the tube 6 covering the outer periphery thereof are fitted to the inner circumference of the guide bush 5a, it is possible to fit the convex portion 1a without the convex portion 1a. As a result, there is a degree of freedom with respect to variations in fitting dimensions, and a good fitting state can be maintained. The convex portion 1a is not limited to one location, but may be formed at a plurality of locations along the circumferential direction.
【００１８】[0018]
【発明の効果】本発明によれば、次の効果がある。The present invention has the following effects.
【００１９】(1) 各請求項の発明によれば、最圧縮時に
シリンダカバーの下端部又はこの下端部に設けたガイド
ブッシュが対向するシリンダの部位に半径方向に膨出す
る凸部を形成し、最圧縮時に両者を係合させるようにし
たので、最圧縮時に車体からの振動がシリンダカバーに
伝わってもこのシリンダカバーがシリンダをたたくこと
が無く打音等の異音の発生を防止できる。(1) According to the inventions of the respective claims, at the time of maximum compression, the lower end portion of the cylinder cover or the guide bush provided at this lower end portion is formed with a convex portion that bulges in the radial direction at the opposite cylinder portion. Since both of them are engaged at the time of maximum compression, even if vibration from the vehicle body is transmitted to the cylinder cover at the time of maximum compression, the cylinder cover does not hit the cylinder and it is possible to prevent abnormal noise such as tapping noise.
【００２０】(2) 同じく、凸部の高さは変化せず、シリ
ンダカバーの下端部又はガイドブッシュと凸部との間の
間隔は一定であるからシリンダカバーが凸部側に侵入で
きなくなるようなことが無い。(2) Similarly, the height of the convex portion does not change and the distance between the lower end of the cylinder cover or the guide bush and the convex portion is constant, so that the cylinder cover cannot enter the convex portion side. There is no such thing.
【００２１】(3) 同じく、シリンダ側には従来のような
ビニールテープを巻回していないからビニールテープの
摩耗という不具合を解消できる。(3) Similarly, since no vinyl tape is wound around the cylinder side, it is possible to eliminate the problem of vinyl tape wear.
【００２２】(4) 同じく、シリンダ側に凸部を設けてい
るだけであるから製造管理が向上する。(4) Similarly, the manufacturing control is improved because only the convex portion is provided on the cylinder side.
【図１】この発明によるガススプリングのカバー体構造
を示す断面図である。FIG. 1 is a sectional view showing a cover body structure of a gas spring according to the present invention.
【図２】この発明によるガススプリングのカバー体構造
の主要部拡大断面図である。FIG. 2 is an enlarged sectional view of a main part of a cover body structure of a gas spring according to the present invention.
１ シリンダ １ａ 凸部 ２ ピストン ３ ピストンロッド ５ シリンダカバー ５ａ ガイドブッシュ 1 cylinder 1a convex part 2 pistons 3 piston rod 5 Cylinder cover 5a Guide bush
フロントページの続き (72)発明者 高瀬 孝次 東京都港区浜松町二丁目４番１号 世界貿 易センタービル カヤバ工業株式会社内 (72)発明者 浅井 寿弘 東京都港区浜松町二丁目４番１号 世界貿 易センタービル カヤバ工業株式会社内 Ｆターム(参考） 3J069 AA01 CC28 DD03 DD26 Continued front page (72) Inventor Koji Takase 2-4-1, Hamamatsucho, Minato-ku, Tokyo World Trade Yasu Center Building Kayaba Industry Co., Ltd. (72) Inventor Toshihiro Asai 2-4-1, Hamamatsucho, Minato-ku, Tokyo World Trade Yasu Center Building Kayaba Industry Co., Ltd. F term (reference) 3J069 AA01 CC28 DD03 DD26
Claims (3)
して移動自在に挿入されると共にガス圧で常時伸び方向
に付勢されているピストンロッドと、ピストンロッドと
連動しながらシリンダの外側を覆うシリンダカバーとを
備えたガススプリングにおいて、最圧縮時にシリンダカ
バーの下端部が対向するシリンダの部位に半径方向に膨
出する凸部を形成し、最圧縮時にシリンダカバーの下端
部内周を前記凸部の外面に当接させることを特徴とする
ガススプリングのカバー体構造。1. A cylinder, a piston rod movably inserted into the cylinder via a piston, and constantly urged in an extension direction by gas pressure, and a cylinder covering the outside of the cylinder while interlocking with the piston rod. In the gas spring provided with the cover, a convex portion that bulges in the radial direction is formed at a portion of the cylinder where the lower end portion of the cylinder cover opposes at the time of maximum compression, and the inner periphery of the lower end portion of the cylinder cover at the time of maximum compression is A cover structure for a gas spring, which is brought into contact with an outer surface.
シュを設け、シリンダカバーの最圧縮ストローク時に前
記ガイドブッシュが対向するシリンダの部位に凸部を設
け、最圧縮時にガイドブッシュの内周を前記凸部の外面
に係合させるようにしたことを特徴とする請求項１記載
のガススプリングのカバー体構造。2. A guide bush is provided on the inner circumference of the lower end of the cylinder cover, and a convex portion is provided on a portion of the cylinder facing the guide bush at the time of the most compression stroke of the cylinder cover. The cover body structure for a gas spring according to claim 1, wherein the cover body structure is adapted to be engaged with an outer surface of the portion.
れている請求項１または２に記載のガススプリングのカ
バー体構造。3. The cover structure for a gas spring according to claim 1, wherein one or a plurality of convex portions are provided in the circumferential direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001246051A JP4726029B2 (en) | 2001-08-14 | 2001-08-14 | Gas spring cover structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001246051A JP4726029B2 (en) | 2001-08-14 | 2001-08-14 | Gas spring cover structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003056630A true JP2003056630A (en) | 2003-02-26 |
| JP4726029B2 JP4726029B2 (en) | 2011-07-20 |
Family
ID=19075685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001246051A Expired - Fee Related JP4726029B2 (en) | 2001-08-14 | 2001-08-14 | Gas spring cover structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4726029B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007021385A1 (en) * | 2007-05-04 | 2008-11-13 | Zf Friedrichshafen Ag | Vibration damper for vehicle, has protective tube provided with bearing surface, where radial distance from bearing surface to guiding surface is variable by maximum gap width up to contact in dependence of stroke position |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59171238A (en) * | 1982-11-12 | 1984-09-27 | ザ・バブコツク・アンド・ウイルコツクス・カンパニ− | Bypass control of station in communication system |
| JPS617638A (en) * | 1984-06-22 | 1986-01-14 | Nec Ic Microcomput Syst Ltd | Semiconductor device |
| JPH0384236A (en) * | 1989-08-29 | 1991-04-09 | Kinugawa Rubber Ind Co Ltd | Dust covering structure for bound bumper |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59171238U (en) * | 1983-05-02 | 1984-11-15 | 株式会社 ドリ−ム総合研究所 | Gas spring for bed with storage box |
| JPS617638U (en) * | 1984-06-20 | 1986-01-17 | トヨタ自動車株式会社 | steering damper |
| JP2605700Y2 (en) * | 1993-12-01 | 2000-07-31 | 松下電器産業株式会社 | Flyback transformer |
-
2001
- 2001-08-14 JP JP2001246051A patent/JP4726029B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59171238A (en) * | 1982-11-12 | 1984-09-27 | ザ・バブコツク・アンド・ウイルコツクス・カンパニ− | Bypass control of station in communication system |
| JPS617638A (en) * | 1984-06-22 | 1986-01-14 | Nec Ic Microcomput Syst Ltd | Semiconductor device |
| JPH0384236A (en) * | 1989-08-29 | 1991-04-09 | Kinugawa Rubber Ind Co Ltd | Dust covering structure for bound bumper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007021385A1 (en) * | 2007-05-04 | 2008-11-13 | Zf Friedrichshafen Ag | Vibration damper for vehicle, has protective tube provided with bearing surface, where radial distance from bearing surface to guiding surface is variable by maximum gap width up to contact in dependence of stroke position |
| DE102007021385B4 (en) * | 2007-05-04 | 2012-11-29 | Zf Friedrichshafen Ag | Vibration damper with protection tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4726029B2 (en) | 2011-07-20 |
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