JPS6230619Y2 - - Google Patents
Info
- Publication number
- JPS6230619Y2 JPS6230619Y2 JP2715982U JP2715982U JPS6230619Y2 JP S6230619 Y2 JPS6230619 Y2 JP S6230619Y2 JP 2715982 U JP2715982 U JP 2715982U JP 2715982 U JP2715982 U JP 2715982U JP S6230619 Y2 JPS6230619 Y2 JP S6230619Y2
- Authority
- JP
- Japan
- Prior art keywords
- spring
- ring
- cut
- cutting
- acute
- 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
- 230000001154 acute effect Effects 0.000 claims description 7
- 241001385733 Aesculus indica Species 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
Landscapes
- Sealing Devices (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
【考案の詳細な説明】
本考案は油圧機器のシール手段において、摺動
リングの損傷防止のために使用されるバツクアツ
プリングに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a back-up spring used in sealing means for hydraulic equipment to prevent damage to a sliding ring.
ピストンとシリンダ、ピストンロツドとシリン
ダカバ、あるいは旋回軸と旋回台のごとく、互い
に嵌合する２部材が、液圧による負荷を受けなが
ら、軸方向または円周方向の相対運動をなす液圧
機器においては、両部材間の隙間からの漏液を防
止する必要があるが、従来、このシール手段とし
て第１図に示すものが知られている。このシール
手段は一方の部材１の環状溝３内に弗素系合成樹
脂材のごとく耐摩耗性に富む材料を用いて製せら
れた摺動リング４が他方の部材２の周面と弾性接
触するごとくに挿入されて両部材１，２間の隙間
５を閉塞しており、該摺動リング４の背面、すな
わち摺動リング４と環状溝３の底周面との間に、
ゴム状弾性材料を用いて製せられたバツクリング
６が介挿されて摺動リング４を他方の部材２の周
面側へ付勢しており、さらに摺動リング４および
バツクリング６の軸方向両端部に断面略四角形状
の環状空所が形成され、この環状空所内に、高強
度の弗素樹脂系もしくはポリアミド系合成樹脂材
料を用いて製せられたバツクアツプリング７が挿
入されて、図中上下両側面に交互に作用する作動
液圧を受けた摺動リング４が隙間５内へくい込ま
れて損傷させられるのを防護している。 In hydraulic equipment, two members that fit together, such as a piston and a cylinder, a piston rod and a cylinder cover, or a pivot shaft and a pivot table, move relative to each other in the axial or circumferential direction while receiving a load from hydraulic pressure. It is necessary to prevent liquid from leaking from the gap between the two members, and a sealing means shown in FIG. 1 is conventionally known as this sealing means. In this sealing means, a sliding ring 4 made of a highly wear-resistant material such as a fluorine-based synthetic resin material is placed in an annular groove 3 of one member 1 and comes into elastic contact with the circumferential surface of the other member 2. It is inserted as shown in FIG.
A back ring 6 made of a rubber-like elastic material is inserted to urge the sliding ring 4 toward the circumferential surface of the other member 2, and further axially both ends of the sliding ring 4 and the back ring 6 are inserted. An annular cavity with a substantially rectangular cross section is formed in the section, and a back-up spring 7 made of a high-strength fluororesin or polyamide synthetic resin material is inserted into the annular cavity, as shown in the figure. This protects the sliding ring 4, which is subjected to hydraulic pressure acting alternately on both the upper and lower sides, from being wedged into the gap 5 and damaged.
上記のシール手段においては、摺動リング４に
対する防護機能を確実になすために、バツクアツ
プリング７と他方の部材２の周面との隙間が最小
限に設定されるが、この隙間が僅小であることは
他方の部材２との嵌合時の困難性を招来し、さら
にバツクアツプリング７がやや硬質であることか
ら、環状溝３内への挿入が困難であるために、バ
ツクアツプリング７を切断して環状体の径寸法を
可変にする構成が用いられ、該構成を有するため
これに付随してバツクアツプリング７の成形時の
径寸法は前記環状空所内に確実に固定されるよう
に、該空所の径寸法より若干大きくされるのが通
常である。 In the above sealing means, in order to ensure the protective function for the sliding ring 4, the gap between the back-up spring 7 and the circumferential surface of the other member 2 is set to the minimum. This causes difficulty when fitting with the other member 2, and furthermore, since the backup spring 7 is somewhat hard, it is difficult to insert it into the annular groove 3. A configuration is used in which the diameter dimension of the annular body is made variable by cutting 7, and because of this configuration, the diameter dimension of the backup spring 7 during molding is reliably fixed within the annular cavity. As such, it is usually slightly larger than the diameter of the space.
バツクアツプリング７に対する切断は、切断に
よつて形成される２個の端末部を互いにオーバー
ラツプさせることによつて、両端末部間に形成さ
れる隙間による影響を最低に抑制するために、第
２図ないし第６図に示すごとく斜め方向になされ
るのが通常である。第２図ないし第４図に示すバ
ツクアツプリング７は、環状体の切線８に対し傾
斜角γを保つて中心軸線９に平行に切断された例
であるが、このバツクアツプリング７を第１図の
シール手段に使用した場合には、該バツクアツプ
リング７が前記環状空所の径寸法に応じて若干縮
径し、切断によつて形成された両端末部が軸心９
からの距離（半径）において相対的に変位し、両
端末部の鋭角端縁部１０，１１が各各、外周もし
くは内周方向に突出することになり（第４図参
照）、他方の部材２に対向した内周側の鋭角端縁
部１０が軸方向の負荷によつて第３図中矢印Ａに
て示す方向に曲られ、両部材１，２間の隙間５内
へくい込まれて損傷させられるおそれがあると同
時に、外周側へ突出したいまひとつの鋭角端縁部
１１がバツクリング６にくい込み、該バツクリン
グ６を損傷するおそれがある。この後者のくい込
みによるバツクリング６損傷のおそれは、当然な
がら、該バツクリング６とバツクアツプリング７
の相対的な硬度差が大であるほど顕著である。ま
た、第５図および第６図の他の例は、環状体の任
意の半径１２を通り、中心軸線９に対し傾斜する
平面によつて切断された例であるが、このバツク
アツプリング７も、上記従来例と同様な理由によ
つて、一方の鋭角端縁部１１の外端が外周方向へ
突出してバツクリング６を損傷するおそれがあ
る。 When cutting the back up spring 7, the two end portions formed by the cutting overlap each other, thereby minimizing the influence of the gap formed between the two end portions. It is usually done in an oblique direction as shown in FIGS. The back-up spring 7 shown in FIGS. 2 to 4 is an example in which the back-up spring 7 is cut parallel to the central axis 9 while keeping the inclination angle γ to the cutting line 8 of the annular body. When used as the sealing means shown in the figure, the back-up spring 7 is slightly reduced in diameter in accordance with the diameter of the annular space, and both end portions formed by cutting are connected to the axis 9.
The sharp edge portions 10 and 11 of both end portions protrude toward the outer circumference or inner circumference, respectively (see FIG. 4), and the other member 2 The sharp edge 10 on the inner circumferential side facing the is bent in the direction shown by arrow A in FIG. At the same time, there is a risk that the other acute edge portion 11 protruding toward the outer circumferential side may become wedged in the back ring 6 and damage the back ring 6. Naturally, there is a risk of damage to the back ring 6 due to this latter biting.
The larger the relative hardness difference, the more noticeable it is. In addition, the other examples shown in FIGS. 5 and 6 are examples in which the annular body is cut by a plane that passes through an arbitrary radius 12 and is inclined with respect to the central axis 9, but this back-up spring 7 is also For the same reason as in the conventional example described above, there is a risk that the outer end of one acute edge portion 11 may protrude toward the outer circumference and damage the back ring 6.
本考案は上記した斜め方向に切断されたバツク
アツプリングにおけるバツクリング損傷を防止す
ることを目的とするもので、そのため本考案のバ
ツクアツプリングは傾斜切断によつて形成される
鋭角端縁部のうち少なくとも上記バツクリングと
の当接端の部分を切除して、該部分によるバツク
リングへのくい込みを防止せんとするものであ
る。 The purpose of the present invention is to prevent buckling damage in the above-mentioned diagonally cut backup spring. At least the portion of the abutting end with the back ring is cut off to prevent the portion from biting into the back ring.
以下、本考案の実施例を第７図ないし第１１図
にしたがつて説明すると、第７図ないし第９図は
第１の実施例を示し、第２図ないし第４図に示し
た環状体の切線８に対し傾斜角γを保つて中心軸
線９に平行に切断されたバツクアツプリング７で
あつて、切断によつて形成される外周側の鋭角端
縁部１１が切除された構造を備えており、第９図
に示すように、バツクアツプリング７が縮径して
も外周方向へ突出する鋭角部分がないため、バツ
クリング６を損傷するおそれがない。該鋭角端縁
部１１の切欠形状は、平面状に限定されず、第１
０図に示すごとく曲面的な丸みを帯びたものであ
つても良い。 Embodiments of the present invention will be explained below with reference to FIGS. 7 to 11. FIGS. 7 to 9 show the first embodiment, and the annular body shown in FIGS. The back-up spring 7 is cut parallel to the central axis 9 while maintaining an inclination angle γ with respect to the cutting line 8 of As shown in FIG. 9, even if the back ring 7 is reduced in diameter, there is no acute angle portion protruding toward the outer circumference, so there is no risk of damaging the back ring 6. The cutout shape of the acute edge portion 11 is not limited to a planar shape, and the shape of the cutout is not limited to a flat shape.
It may be curved and rounded as shown in Figure 0.
第１１図は本考案の他の実施例を示し、環状体
の切断が第５図および第６図に示した環状体の半
径１２を含んで中心軸線９に対し傾斜する平面に
よつてなされたバツクアツプリング７であつて、
切断によつて形成される一方の鋭角端縁部１１の
外端が切除された構造を具えている。 FIG. 11 shows another embodiment of the invention, in which the cut of the annular body is made by a plane that includes the radius 12 of the annular body shown in FIGS. 5 and 6 and is inclined to the central axis 9. Backup Spring 7,
It has a structure in which the outer end of one acute edge 11 formed by cutting is cut off.
なお、上記第１および第２実施例において、図
面上、他方の鋭角端縁部１０の内端に形成された
切除部は、該鋭角端縁部１０が相対運動２部材
１，２間の隙間５へくい込むことを防止するもの
である。 In addition, in the above first and second embodiments, in the drawings, the cutout portion formed at the inner end of the other acute-angled edge portion 10 means that the acute-angled edge portion 10 is relatively movable in the gap between the two members 1 and 2. This is to prevent it from getting wedged into the hole.
本考案のバツクアツプリングは、以上説明した
ように、環状体を斜め方向に切断することによつ
て形成される鋭角端縁部のうち少なくともバツク
リングとの当接端の部分を欠除した構成であるた
めに、従来技術によるバツクアツプリングにみら
れた鋭角端縁部のくい込みによるバツクリングの
損傷が防止され、該バツクアツプリングを使用し
たシール手段は長期間にわたつて正常なシール機
能を持続し得、その実用的効果にはきわめて大な
るものがある。 As explained above, the back-up spring of the present invention has a configuration in which at least the part of the abutting end with the back-up ring is removed from among the acute-angled edges formed by cutting the annular body diagonally. This prevents damage to the back ring due to biting of the sharp edge, which was seen in back up springs according to the prior art, and the sealing means using the back up spring maintains a normal sealing function over a long period of time. The practical effects are extremely large.
図面は本考案の実施例を示すものであり、第１
図は本考案の対象となるバツクアツプリングを使
用したシール手段の構造を示す断面図、第２図は
従来技術によるバツクアツプリングの一例を示す
平面図、第３図は同部分斜視図、第４図は同バツ
クアツプリングを使用したシール手段の不具合を
示す説明図、第５図は従来技術によるバツクアツ
プリングの他の例を示す断面図、第６図は同要部
斜視図、第７図は本考案の第１実施例を示す要部
平面図、第８図は同要部斜視図、第９図は同使用
状態を示す説明図、第１０図は同第１実施例の変
形例を示す要部平面図、第１１図は本考案の第２
実施例を示す要部斜視図である。
１……一方の部材、２……他方の部材、３……
環状溝、４……摺動リング、５……隙間、６……
バツクリング、７……バツクアツプリング、８…
…切線、９……中心軸線、１０，１１……鋭角端
縁部、１２……半径。
The drawings show an embodiment of the present invention.
The figure is a cross-sectional view showing the structure of a sealing means using a back-up spring which is the object of the present invention, FIG. 2 is a plan view showing an example of a back-up spring according to the prior art, FIG. Fig. 4 is an explanatory diagram showing a malfunction of the sealing means using the same back-up spring, Fig. 5 is a cross-sectional view showing another example of the back-up spring according to the prior art, Fig. 6 is a perspective view of the same essential part, and Fig. 7 The figure is a plan view of the main part showing the first embodiment of the present invention, Fig. 8 is a perspective view of the main part, Fig. 9 is an explanatory diagram showing the same usage state, and Fig. 10 is a modification of the first embodiment. FIG. 11 is a plan view of the main part showing the second part of the present invention.
FIG. 2 is a perspective view of essential parts showing an example. 1...One member, 2...The other member, 3...
Annular groove, 4...Sliding ring, 5...Gap, 6...
Back ring, 7...Back up spring, 8...
... Cutting line, 9 ... Central axis line, 10, 11 ... Acute edge, 12 ... Radius.
Claims (1)
なす２部材のうちの一方に削設された環状溝内に
背面にバツクリングを備えて嵌着される摺動リン
グの摺動に伴なう不要変形を阻止する位置に嵌着
されるバツクアツプリングにおいて、該バツクア
ツプリングを斜め方向に切断することによつて形
成される鋭角端縁部の少くとも前記バツクリング
との当接端の部分を切除してなるバツクアツプリ
ング。 This prevents unnecessary deformation caused by the sliding of a sliding ring that is fitted with a back ring on the back in an annular groove cut into one of two members such as a piston and cylinder that fit together and move relative to each other. In the back-up spring fitted in the blocking position, at least the portion of the abutting end with the back-ring of the acute edge formed by cutting the back-up spring in a diagonal direction is cut off. Naru back-up spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2715982U JPS58132264U (en) | 1982-03-01 | 1982-03-01 | back spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2715982U JPS58132264U (en) | 1982-03-01 | 1982-03-01 | back spring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58132264U JPS58132264U (en) | 1983-09-06 |
| JPS6230619Y2 true JPS6230619Y2 (en) | 1987-08-06 |
Family
ID=30039076
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2715982U Granted JPS58132264U (en) | 1982-03-01 | 1982-03-01 | back spring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58132264U (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2593782Y2 (en) * | 1992-06-15 | 1999-04-12 | エヌオーケー株式会社 | Sealing device |
| JP5009776B2 (en) * | 2007-12-27 | 2012-08-22 | 株式会社小松製作所 | Engine seal structure, resin ring, and engine |
| JP2012154353A (en) * | 2011-01-21 | 2012-08-16 | Nok Corp | Airtight device |
-
1982
- 1982-03-01 JP JP2715982U patent/JPS58132264U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58132264U (en) | 1983-09-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6215562Y2 (en) | ||
| US4190259A (en) | Single apex two element fluid pressure seal assembly | |
| US4566703A (en) | Seal assembly | |
| JPH0543310Y2 (en) | ||
| JPS62171522A (en) | Bearing device with seal | |
| JPS6230619Y2 (en) | ||
| WO2004079221A1 (en) | Piston for shock absorber | |
| JP4229987B2 (en) | Shaft wiper seal | |
| US4431200A (en) | Back-up ring with slitted, folded portion for packing of hydraulic apparatus | |
| US4660839A (en) | Endless backup ring for hydraulic apparatus seal | |
| JPS628688Y2 (en) | ||
| US3414034A (en) | Lock ring for threaded members | |
| US4227705A (en) | Semicircular plug for preventing leakage of oil in a cylinder head of an overhead cam shaft engine | |
| JPH0260768U (en) | ||
| JPS6240208Y2 (en) | ||
| JPS5838196Y2 (en) | Patsuking | |
| JPS6238052Y2 (en) | ||
| JPS5840384Y2 (en) | back spring | |
| JPS5952274U (en) | Patsuking | |
| JPH0448361Y2 (en) | ||
| JPS6222701Y2 (en) | ||
| JPH0529589Y2 (en) | ||
| JP2595340Y2 (en) | Sealing device | |
| JP4670210B2 (en) | Sealing device | |
| JPS6330851Y2 (en) |