JP3436287B2 - Seal ring - Google Patents

Seal ring

Info

Publication number
JP3436287B2
JP3436287B2 JP15410895A JP15410895A JP3436287B2 JP 3436287 B2 JP3436287 B2 JP 3436287B2 JP 15410895 A JP15410895 A JP 15410895A JP 15410895 A JP15410895 A JP 15410895A JP 3436287 B2 JP3436287 B2 JP 3436287B2
Authority
JP
Japan
Prior art keywords
axial
cut
groove
wall surface
radial
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 - Fee Related
Application number
JP15410895A
Other languages
Japanese (ja)
Other versions
JPH08326923A (en
Inventor
光弘 曽和
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nok Corp
Original Assignee
Nok Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nok Corp filed Critical Nok Corp
Priority to JP15410895A priority Critical patent/JP3436287B2/en
Publication of JPH08326923A publication Critical patent/JPH08326923A/en
Application granted granted Critical
Publication of JP3436287B2 publication Critical patent/JP3436287B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は、密封装置の一種である
シールリングに関する。本発明のシールリングは例え
ば、自動車のオートマティックトランスミッションに用
いられる。 【0002】 【従来の技術】従来から、図11ないし図14にそれぞ
れ一部を示すように、全体として環状であり、断面(当
該シールリング21の中心軸線を含む平面で裁断した断
面、以下、同じ)矩形であり、組込み性を向上させるた
めに円周上の一箇所で切断されており、更に、使用温度
が変化してもこの切断部(カット部とも称する)22に
隙間が発生することがないように、この切断部22にス
テップカット23を設けたシールリング21が知られて
いる。 【0003】ステップカット23は、切断部22を挾ん
で互いに対をなす切断端部24,25のそれぞれ外周側
に、断面略矩形の凹部26,27と凸部28,29とを
軸方向に並べて設け、一方の切断端部24の凹部26と
他方の切断端部25の凸部29とを係合させるとともに
一方の切断端部24の凸部28と他方の切断端部25の
凹部27とを係合させたものであって、図示したように
二段ステップ状になっていることから、一段ステップ状
の狭義の「ステップカット」と区別すべく、特に「特殊
ステップカット」と称されることもある。尚、図12
は、ステップカット23を見易くするため、図11の係
合状態(自由状態)に対してA方向に引張り力を加え
て、切断部22を円周方向に開いた状態を示している。
また図13はステップカット23を径方向外方から見た
平面図、図14はステップカット23を軸方向一方から
見た正面図であり、この図14に表わされた軸方向端面
が、装着溝(図示せず)の内壁に密接するシール面30
として作用する。 【0004】上記構成のシールリング21においては、
そのシール性能を良好に維持するために、図13に示し
たように、互いに対向する一方の切断端部24の凹部2
6の軸方向内壁面26aと他方の切断端部25の凸部2
9の軸方向端面29aとが互いに接触するとともに、図
14に示したように、互いに対向する一方の切断端部2
4の凹部26の径方向内壁面26bと他方の切断端部2
5の凸部29の内周面29bとが互いに接触することが
要求される。 【0005】しかしながら、実際には、製作時の寸法の
ばらつきによって、図15に示すように、一方の切断端
部24の凹部26の軸方向内壁面26aと他方の切断端
部25の凸部29の軸方向端面29aの間に軸方向の隙
間31が生じたり、図16に示すように、一方の切断端
部24の凹部26の径方向内壁面26bと他方の切断端
部25の凸部29の内周面29bの間に径方向の隙間3
2が生じたりすることがあり、このような隙間31,3
2が生じると、これらの隙間31,32を伝って、点線
で示すようにして、圧油等のシール流体が漏洩する問題
がある。 【0006】 【発明が解決しようとする課題】本発明は以上の点に鑑
み、上記したような二段ステップ状のステップカット
(特殊ステップカット)を設けたシールリングにおい
て、凹部と凸部の間に軸方向の隙間または径方向の隙間
があっても、これを塞ぐことが可能であり、もって優れ
たシール性能を発揮することが可能なシールリングを提
供することを目的とする。 【0007】 【課題を解決するための手段】上記目的を達成するた
め、本発明のシールリングは、円周上の一箇所で切断さ
れ、切断端部のそれぞれに断面略矩形の凹部および凸部
を並べて設け、一方の切断端部の凹部と他方の切断端部
の凸部とを係合させるとともに一方の切断端部の凸部と
他方の切断端部の凹部とを係合させ、一方の切断端部の
凹部の軸方向内壁面および径方向内壁面と他方の切断端
部の凸部の軸方向端面および内周面とを互いに対向させ
るとともに一方の切断端部の凸部の軸方向端面および内
周面と他方の切断端部の凹部の軸方向内壁面および径方
向内壁面とを互いに対向させてなる二段ステップ状のス
テップカットを設けたシールリングにおいて、前記一方
の切断端部の凹部の軸方向内壁面および径方向内壁面に
溝を設け、前記溝は、前記凹部の軸方向内壁面に設けら
れた軸方向溝部と、前記凹部の径方向内壁面に設けられ
た径方向溝部とを一連に有し、前記他方の切断端部の凸
部の軸方向端面および内周面に、前記溝に挿入されて前
記溝の内面に密接する楔状の突起を設け、前記突起は、
前記凸部の軸方向端面に設けられて前記軸方向溝部に挿
入される軸方向リップ部と、前記凸部の内周面に設けら
れて前記径方向溝部に挿入される径方向リップ部とを一
体に有し、前記突起はシール圧力を受けて撓んで溝の内
面に密接するものであることにした。 【0008】 【作用】上記構成を備えた本発明のシールリングにおい
ては、一方の切断端部の凹部の内壁面と対向する他方の
切断端部の凸部の対向面に楔状の突起が設けられるとと
もに一方の切断端部の凹部の内壁面にこの突起を挿入す
る溝が設けられているために、凹部と凸部の間に軸方向
の隙間または径方向の隙間があっても、この突起によっ
て、これらの隙間を塞ぐことが可能となる。楔状の突起
は、当初(シール圧力が作用する以前)から溝の内面に
接触していても良く、または当初は溝の内面から離れて
いるが、シール圧力を受けて溝の内面に接触するもので
あっても良い。 【0009】 【実施例】つぎに本発明の実施例を図面にしたがって説
明する。 【0010】図1ないし図8にそれぞれ一部を示すよう
に、当該実施例に係るシールリング1は、全体として環
状であり、断面(当該シールリング1の中心軸線を含む
平面で裁断した断面、以下、同じ)矩形であり、組込み
性を向上させるために円周上の一箇所で切断されてお
り、この切断部2に、ステップカット3が設けられてい
る。このステップカット3は、切断部2を挾んで互いに
対をなす切断端部4,5のそれぞれ外周側に、断面略矩
形の凹部6,7と凸部8,9とを軸方向に並べて設け、
一方の切断端部4の凹部6と他方の切断端部5の凸部9
とを係合させるとともに一方の切断端部4の凸部8と他
方の切断端部5の凹部7とを係合させたものであって、
上記した二段ステップ状の「特殊ステップカット」の範
疇に属し、また図5に表わされた軸方向端面が、装着溝
17(図6ないし図8参照)の内壁17aに密接するシ
ール面10として作用する。尚、このシールリング1は
樹脂製であって、射出成形または切削加工により成形さ
れている。 【0011】一方の切断端部4の凹部6の内壁面、すな
わち軸方向内壁面6aおよび径方向内壁面6bと対向す
る他方の切断端部5の凸部9の対向面、すなわち軸方向
端面9aおよび内周面9bに、楔状を呈する突起14が
凸部9に対して一体に成形されており、一方の切断端部
4の凹部6の内壁面、すなわち軸方向内壁面6aおよび
径方向内壁面6bに、この突起14を挿入する溝15が
設けられている。またこれと対称的に、他方の切断端部
5の凹部7の内壁面、すなわち軸方向内壁面7aおよび
径方向内壁面(図示せず)と対向する一方の切断端部4
の凸部8の対向面、すなわち軸方向端面8aおよび内周
面8bに、楔状を呈する突起13が凸部8に対して一体
に成形されており、他方の切断端部5の凹部7の内壁
面、すなわち軸方向内壁面7aおよび径方向内壁面に、
この突起13を挿入する溝16が設けられている。 【0012】他方の切断端部5に設けられた楔状の突起
14は、図8に示したように、凸部9の軸方向端面9a
から軸方向一方(図上左方向)へ向けて離れるにしたが
って肉厚が漸次薄くなる軸方向リップ部14aと、凸部
9の内周面9bから径方向内方(図上下方向)へ向けて
離れるにしたがって肉厚が漸次薄くなる径方向リップ部
14bとよりなり、両リップ部14a,14bが略L字
形に並べられて一体に成形されている。またこの突起1
4を挿入する、一方の切断端部4に設けられた溝15
は、図2または図8に示したように、凹部6の軸方向内
壁面6aから深まるに連れて溝幅が漸次狭くなる軸方向
溝部15aと、凹部6の径方向内壁面6bから深まるに
連れて溝幅が漸次狭くなる径方向溝部15bとよりな
り、両溝部15a,15bが略L字形に並べられて一連
に形成されており、前者の軸方向溝部15aに軸方向リ
ップ部14aが挿入され、後者の径方向溝部15bに径
方向リップ部14bが挿入された関係となっている。溝
15は、熱膨張による円周方向の寸法変化量を吸収でき
る幅をもっている。突起14は、当初(シール圧力が作
用する以前)からこの溝15の内面に接触していても良
く、または当初は溝15の内面から離れているが、シー
ル圧力を受けたときに初めて溝15の内面に接触するも
のであっても良い。 【0013】また、対称的に一方の切断端部4に設けら
れた楔状の突起13は、図2または図3に示したよう
に、凸部8の軸方向端面8aから軸方向一方へ向けて離
れるにしたがって肉厚が漸次薄くなる軸方向リップ部1
3aと、凸部8の内周面8bから径方向内方へ向けて離
れるにしたがって肉厚が漸次薄くなる径方向リップ部1
3bとよりなり、両リップ部13a,13bが略L字形
に並べられて一体に成形されている。またこの突起13
を挿入する、他方の切断端部5に設けられた溝16は、
凹部8の軸方向内壁面8aから深まるに連れて溝幅が漸
次狭くなる軸方向溝部(図示せず)と、凹部8の径方向
内壁面8bから深まるに連れて溝幅が漸次狭くなる径方
向溝部(図示せず)とよりなり、両溝部が略L字形に並
べられて一連に形成されており、前者の軸方向溝部16
aに軸方向リップ部が挿入され、後者の径方向溝部16
bに径方向リップ部が挿入された関係となっている。溝
16は、熱膨張による円周方向の寸法変化量を吸収でき
る幅をもっている。突起13は、当初(シール圧力が作
用する以前)からこの溝16の内面に接触していても良
く、または当初は溝16の内面から離れているが、シー
ル圧力を受けたときに初めて溝16の内面に接触するも
のであっても良い。 【0014】上記構成を備えたシールリング1において
は、一方の切断端部4の凹部6の軸方向内壁面6aおよ
び径方向内壁面6bと対向する他方の切断端部5の凸部
9の軸方向端面9aおよび内周面9bに楔状の突起14
が設けられるとともに、一方の切断端部4の凹部6の軸
方向内壁面6aおよび径方向内壁面6bにこの突起14
を挿入する溝15が設けられているために、図示したよ
うに、一方の切断端部4の凹部6の軸方向内壁面6aと
他方の切断端部5の凸部9の軸方向端面9aの間に軸方
向の隙間11があったり、一方の切断端部4の凹部6の
径方向内壁面6bと他方の切断端部5の凸部9の内周面
9bの間に径方向の隙間12があったりしても、突起1
4が溝15の内面に密接することによって、実質的にこ
の隙間11,12による漏れ流路を塞ぐことが可能であ
る。したがってこれにより隙間11,12から圧油等の
シール流体が漏洩するのを防止することができ、シール
性能に優れたシールリング1を提供することができる。
突起14は、図9および図10に示したように、シール
圧力を受けて撓み、溝15の内面に強く密接する。 【0015】また上記構成のシールリング1において
は、一方の切断端部4の凹部6の軸方向内壁面6aおよ
び径方向内壁面6bと対向する他方の切断端部5の凸部
9の軸方向端面9aおよび内周面9bに楔状を呈する突
起14が設けられるとともに、一方の切断端部4の凹部
6の軸方向内壁面6aおよび径方向内壁面6bにこの突
起14を挿入する溝15が設けられているのと対称的
に、他方の切断端部5の凹部7の軸方向内壁面7aおよ
び径方向内壁面と対向する一方の切断端部4の凸部8の
軸方向端面8aおよび内周面8bに楔状を呈する突起1
3が設けられるとともに、他方の切断端部5の凹部7の
軸方向内壁面7aおよび径方向内壁面にこの突起13を
挿入する溝16が設けられている。したがって当該シー
ルリング1を軸方向反対向きに装着溝17に装着する
と、この場合は、一方の切断端部4に設けられた突起1
3がシール圧力を受けて溝16の内面に密接して、シー
ル作用を発揮する。したがって当該シールリング1に
は、その軸方向の装着の向きに関して、どちら向きにも
装着することができる効果がある。 【0016】 【発明の効果】本発明は、以下の効果を奏する。 【0017】すなわち、上記構成を備えた本発明のシー
ルリングにおいては、円周上の一箇所で切断され、切断
端部のそれぞれに断面略矩形の凹部および凸部を並べて
設け、一方の切断端部の凹部と他方の切断端部の凸部と
を係合させるとともに一方の切断端部の凸部と他方の切
断端部の凹部とを係合させ、一方の切断端部の凹部の軸
方向内壁面および径方向内壁面と他方の切断端部の凸部
の軸方向端面および内周面とを互いに対向させるととも
に一方の切断端部の凸部の軸方向端面および内周面と他
方の切断端部の凹部の軸方向内壁面および径方向内壁面
とを互いに対向させてなる二段ステップ状のステップカ
ットを設けたシールリングにおいて、前記一方の切断端
部の凹部の軸方向内壁面および径方向内壁面に溝を設
け、前記溝は、前記凹部の軸方向内壁面に設けられた軸
方向溝部と、前記凹部の径方向内壁面に設けられた径方
向溝部とを一連に有し、前記他方の切断端部の凸部の軸
方向端面および内周面に、前記溝に挿入されて前記溝の
内面に密接する楔状の突起を設け、前記突起は、前記凸
部の軸方向端面に設けられて前記軸方向溝部に挿入され
る軸方向リップ部と、前記凸部の内周面に設けられて前
記径方向溝部に挿入される径方向リップ部とを一体に
し、更に前記突起はシール圧力を受けて撓んで溝の内面
に密接するものであるために、一方の切断端部の凹部の
軸方向内壁面と他方の切断端部の凸部の軸方向端面の間
に軸方向の隙間があったり、一方の切断端部の凹部の径
方向内壁面と他方の切断端部の凸部の内周面の間に径方
向の隙間があったりしても、突起が溝の内面に密接する
ことによって、実質的にこの隙間による漏れ流路を塞ぐ
ことが可能である。したがってこれにより上記二段ステ
ップ状のステップカットを設けたシールリングにおい
て、隙間からシール流体が漏洩するのを防止することが
でき、優れたシール性能を発揮するシールリングを提供
することができる。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal ring which is a kind of a sealing device. The seal ring of the present invention is used, for example, in an automatic transmission of an automobile. 2. Description of the Related Art Conventionally, as shown partially in FIGS. 11 to 14, each of them has a ring shape as a whole and has a cross section (a cross section cut along a plane including the center axis of the seal ring 21; The same) rectangular shape, which is cut at one point on the circumference in order to improve the assembling property, and furthermore, a gap is generated in the cut portion (also called a cut portion) 22 even when the operating temperature changes. There is known a seal ring 21 in which a cut portion 22 is provided with a step cut 23 so that there is no gap. A step cut 23 is formed by arranging concave portions 26, 27 and convex portions 28, 29 each having a substantially rectangular cross section in the axial direction on the outer peripheral side of each of cut ends 24, 25 forming a pair with each other across the cut portion 22. The concave portion 26 of the one cut end 24 is engaged with the convex portion 29 of the other cut end 25, and the convex portion 28 of the one cut end 24 and the concave portion 27 of the other cut end 25 are engaged. Because it is engaged and has a two-step shape as shown in the figure, it is particularly called a "special step cut" to distinguish it from a narrow "step cut" in a one-step shape. There is also. FIG.
Shows a state in which a tensile force is applied in the direction A to the engaged state (free state) in FIG. 11 to make the step cut 23 easier to see, and the cut portion 22 is opened in the circumferential direction.
13 is a plan view of the step cut 23 as viewed from the outside in the radial direction. FIG. 14 is a front view of the step cut 23 as viewed from one side in the axial direction. The axial end face shown in FIG. Seal surface 30 closely contacting the inner wall of the groove (not shown)
Act as In the seal ring 21 having the above structure,
In order to maintain good sealing performance, as shown in FIG.
6 and the convex portion 2 of the other cut end 25
9 is in contact with the axial end surfaces 29a, and as shown in FIG.
4 and the other cut end 2
5 are required to be in contact with the inner peripheral surface 29b of the convex portion 29. However, in practice, due to variations in dimensions at the time of manufacture, as shown in FIG. 15, the axial inner wall surface 26a of the concave portion 26 of one cut end 24 and the convex portion 29 of the other cut end 25 as shown in FIG. A gap 31 in the axial direction is generated between the axial end surfaces 29a of the cut ends 24, and the radial inner wall surface 26b of the concave portion 26 of one cut end portion 24 and the convex portions 29 of the other cut end portion 25 as shown in FIG. Radial gap 3 between inner peripheral surfaces 29b
2 may occur, and such gaps 31, 3
When 2 occurs, there is a problem that the sealing fluid such as pressure oil leaks along the gaps 31 and 32 as shown by the dotted line. SUMMARY OF THE INVENTION In view of the above, the present invention provides a seal ring provided with a two-step step-like step cut (special step cut) as described above. It is an object of the present invention to provide a seal ring which can close even if there is an axial gap or a radial gap, and which can exhibit excellent sealing performance. In order to achieve the above object, a seal ring of the present invention is cut at one place on a circumference, and each of cut ends has a concave portion and a convex portion having a substantially rectangular cross section. Are arranged side by side, and the concave portion of one cut end and the convex portion of the other cut end are engaged with each other, and the convex portion of one cut end and the concave portion of the other cut end are engaged with each other. The axial inner wall surface and the radial inner wall surface of the concave portion of the cut end portion and the axial end surface and the inner peripheral surface of the convex portion of the other cut end portion are opposed to each other, and the axial end surface of the convex portion of the one cut end portion. And a seal ring provided with a two-stage step-shaped cut in which the inner circumferential surface and the axial inner wall surface and the radial inner wall surface of the concave portion of the other cut end face each other. Grooves are formed on the inner wall in the axial and radial directions of the recess. In addition, the groove has a series of axial grooves provided on the inner wall surface in the axial direction of the recess and radial grooves provided on the inner wall surface in the radial direction of the recess. On the axial end surface and the inner peripheral surface of the projection, a wedge-shaped projection is provided which is inserted into the groove and is in close contact with the inner surface of the groove.
An axial lip portion provided on the axial end surface of the convex portion and inserted into the axial groove portion, and a radial lip portion provided on the inner peripheral surface of the convex portion and inserted into the radial groove portion. The projections are bent under the sealing pressure to be bent in the groove.
We decided to be close to the surface . In the seal ring of the present invention having the above-described structure, a wedge-shaped projection is provided on the surface of the other cut end opposite to the inner wall surface of the recess at the one cut end. Also, since a groove for inserting this projection is provided on the inner wall surface of the concave portion of one cut end, even if there is an axial gap or a radial gap between the concave portion and the convex portion, These gaps can be closed. The wedge-shaped projection may be in contact with the inner surface of the groove from the beginning (before the sealing pressure is applied), or is initially separated from the inner surface of the groove, but comes into contact with the inner surface of the groove under the sealing pressure It may be. Next, an embodiment of the present invention will be described with reference to the drawings. As shown partially in FIGS. 1 to 8, the seal ring 1 according to the embodiment is annular as a whole and has a cross section (a cross section cut along a plane including the center axis of the seal ring 1, The same applies to the following. The shape is rectangular, and is cut at one position on the circumference in order to improve the assembling property. The cut portion 2 is provided with a step cut 3. In this step cut 3, concave portions 6, 7 and convex portions 8, 9 having a substantially rectangular cross section are provided in the axial direction on the outer peripheral side of each of the cut ends 4, 5 forming a pair with each other with the cut portion 2 interposed therebetween.
The concave portion 6 of one cut end 4 and the convex portion 9 of the other cut end 5
And the projection 8 of the one cut end 4 and the recess 7 of the other cut end 5 are engaged with each other,
The seal face 10 which belongs to the category of the above-mentioned two-step “special step cut” and whose axial end face shown in FIG. 5 is in close contact with the inner wall 17a of the mounting groove 17 (see FIGS. 6 to 8). Act as The seal ring 1 is made of resin and is formed by injection molding or cutting. The opposing surface of the projection 9 of the other cut end 5 which faces the inner wall surface of the concave portion 6 of one cut end 4, ie, the axial inner wall surface 6 a and the radial inner wall surface 6 b, ie, the axial end surface 9 a In addition, a wedge-shaped projection 14 is integrally formed on the inner peripheral surface 9b with respect to the convex portion 9, and the inner wall surface of the concave portion 6 of one cut end portion 4, that is, the axial inner wall surface 6a and the radial inner wall surface 6b is provided with a groove 15 into which the projection 14 is inserted. Also, symmetrically, one of the cut ends 4 facing the inner wall surface of the concave portion 7 of the other cut end portion 5, that is, the axial inner wall surface 7a and the radial inner wall surface (not shown).
A projection 13 having a wedge shape is formed integrally with the projection 8 on the opposite surface of the projection 8, that is, on the axial end face 8 a and the inner peripheral face 8 b, and inside the recess 7 of the other cut end 5. On the wall surface, that is, on the axial inner wall surface 7a and the radial inner wall surface,
A groove 16 for inserting the projection 13 is provided. As shown in FIG. 8, the wedge-shaped projection 14 provided on the other cut end 5 has an axial end face 9a of the projection 9 as shown in FIG.
From the inner peripheral surface 9b of the convex portion 9 to the radially inward (vertical direction in the figure) from the axial lip portion 14a whose thickness becomes gradually thinner as the distance increases in the axial direction (left direction in the figure). A radial lip portion 14b whose thickness gradually decreases as the distance from the lip portion increases, and both lip portions 14a and 14b are arranged in a substantially L-shape and integrally formed. In addition, this projection 1
4 into which one of the cut ends 4 is inserted.
As shown in FIG. 2 or FIG. 8, as shown in FIG. 2 or FIG. 8, the groove width gradually decreases as the groove depth increases from the axial inner wall surface 6 a, and as the groove depth increases from the radial inner wall surface 6 b of the recess 6. The groove 15b has a radial groove 15b whose width gradually decreases. The two grooves 15a and 15b are arranged in a substantially L-shape and are formed in a series. The axial lip 14a is inserted into the former axial groove 15a. In this case, the radial lip 14b is inserted into the radial groove 15b. The groove 15 has a width capable of absorbing a circumferential dimensional change due to thermal expansion. The protrusion 14 may be in contact with the inner surface of the groove 15 from the beginning (before the sealing pressure is applied), or may be initially separated from the inner surface of the groove 15 but only when subjected to the sealing pressure. May be in contact with the inner surface of the substrate. Further, as shown in FIG. 2 or FIG. 3, the wedge-shaped projections 13 provided symmetrically on one of the cut ends 4 extend in the axial direction from the axial end face 8a of the convex portion 8. Axial lip 1 whose thickness gradually decreases as the distance increases
3a and a radial lip portion 1 whose thickness gradually decreases as the distance from the inner peripheral surface 8b of the convex portion 8 toward the inside in the radial direction decreases.
3b, and both lip portions 13a and 13b are arranged in a substantially L-shape and are integrally formed. The protrusion 13
The groove 16 provided in the other cut end 5 for inserting
An axial groove portion (not shown) in which the groove width gradually narrows as it deepens from the axial inner wall surface 8a of the concave portion 8, and a radial direction in which the groove width gradually narrows as it deepens from the radial inner wall surface 8b of the concave portion 8 A groove (not shown), and both grooves are arranged in a substantially L-shape and are formed in series.
The axial lip portion is inserted into the radial groove portion 16a.
The relationship is such that the radial lip portion is inserted into b. The groove 16 has a width capable of absorbing a dimensional change in a circumferential direction due to thermal expansion. The projection 13 may be in contact with the inner surface of the groove 16 from the beginning (before the sealing pressure is applied), or may be initially separated from the inner surface of the groove 16, but only when the sealing pressure is applied. May be in contact with the inner surface of the substrate. In the seal ring 1 having the above-described configuration, the axis of the projection 9 of the other cut end 5 which faces the axial inner wall surface 6a and the radial inner wall surface 6b of the recess 6 of one cut end 4 is shown. Wedge-shaped projections 14 on the direction end surface 9a and the inner peripheral surface 9b.
Are provided, and the projections 14 are formed on the axial inner wall surface 6a and the radial inner wall surface 6b of the concave portion 6 of the one cut end portion 4.
Is provided, as shown, the axial inner wall surface 6a of the concave portion 6 of the one cut end 4 and the axial end surface 9a of the convex portion 9 of the other cut end 5 as shown in the drawing. There is an axial gap 11 between them, or a radial gap 12 between the radial inner wall surface 6b of the concave portion 6 of one cut end 4 and the inner peripheral surface 9b of the convex portion 9 of the other cut end 5. Even if there is, protrusion 1
The close contact of the groove 4 with the inner surface of the groove 15 makes it possible to substantially close the leakage flow path formed by the gaps 11 and 12. Accordingly, it is possible to prevent the sealing fluid such as pressure oil from leaking from the gaps 11 and 12, thereby providing the seal ring 1 having excellent sealing performance.
As shown in FIGS. 9 and 10, the projection 14 bends under the sealing pressure and strongly contacts the inner surface of the groove 15. In the seal ring 1 having the above structure, the axial direction of the convex portion 9 of the other cut end 5 which faces the axial inner wall surface 6a and the radial inner wall surface 6b of the concave portion 6 of one cut end 4 is described. A wedge-shaped protrusion 14 is provided on the end surface 9a and the inner peripheral surface 9b, and a groove 15 for inserting the protrusion 14 is provided on the axial inner wall surface 6a and the radial inner wall surface 6b of the concave portion 6 of the one cut end portion 4. Symmetrically, the axial end face 8a and the inner circumference of the projection 8 of the one cut end 4 that faces the axial inner wall face 7a and the radial inner wall face of the recess 7 of the other cut end 5 Wedge-shaped projection 1 on surface 8b
3 is provided, and a groove 16 for inserting the projection 13 is provided on the axial inner wall surface 7a and the radial inner wall surface of the concave portion 7 of the other cut end 5. Therefore, when the seal ring 1 is mounted in the mounting groove 17 in the axially opposite direction, in this case, the projection 1 provided on one cut end 4 is provided.
3 receives sealing pressure and comes into close contact with the inner surface of the groove 16 to exert a sealing action. Therefore, there is an effect that the seal ring 1 can be mounted in either direction with respect to the mounting direction in the axial direction. The present invention has the following effects. That is, in the seal ring of the present invention having the above-described structure, a cut portion is cut at one position on the circumference, and a concave portion and a convex portion each having a substantially rectangular cross section are provided side by side at each of the cut ends. The concave portion of the cut portion is engaged with the convex portion of the other cut end, and the convex portion of one cut end is engaged with the concave portion of the other cut end, and the axial direction of the concave portion of the one cut end is engaged. The inner wall surface and the radial inner wall surface and the axial end surface and the inner peripheral surface of the convex portion of the other cut end face each other, and the axial end surface and the inner peripheral surface of the convex portion of the one cut end portion and the other cut. In a seal ring provided with a two-step-shaped step cut in which an axial inner wall surface and a radial inner wall surface of a concave portion at an end face each other, an axial inner wall surface and a radial size of the concave portion at the one cut end portion are provided. A groove is provided on the inner wall surface in the direction, and the groove is An axial groove provided on the axial inner wall surface of the portion, and a series of radial grooves provided on the radial inner wall surface of the concave portion, the axial end surface of the convex portion of the other cut end and An inner peripheral surface is provided with a wedge-shaped projection that is inserted into the groove and is in close contact with the inner surface of the groove. The projection is provided on an axial end surface of the projection and is inserted in the axial groove. Yes and parts, and a radial lip portion provided on the inner peripheral surface of the convex portion is inserted into the radial groove together
Further, the projection is bent under the sealing pressure to bend, and the inner surface of the groove is bent.
Because there is an axial gap between the axial inner wall surface of the concave portion of one cut end and the axial end surface of the convex portion of the other cut end, or one cut end Even if there is a radial gap between the radial inner wall surface of the concave portion and the inner peripheral surface of the convex portion at the other cut end, the gap is substantially formed by the close contact of the projection with the inner surface of the groove. It is possible to close the leakage flow path. Accordingly, in the seal ring provided with the two-step step cut, the seal fluid can be prevented from leaking from the gap, and a seal ring exhibiting excellent sealing performance can be provided.

【図面の簡単な説明】 【図1】本発明の実施例に係るシールリングのステップ
カット部分の斜視図 【図2】同シールリングの一方の切断端部のみを描いた
斜視図 【図3】図2におけるB方向矢視図 【図4】同ステップカット部分を径方向外方から見た平
面図 【図5】同ステップカット部分を軸方向一方から見た正
面図 【図6】図5におけるC−C線で裁断した同シールリン
グの装着状態を示す断面図 【図7】図5におけるD−D線で裁断した同シールリン
グの装着状態を示す断面図 【図8】図5におけるE−E線で裁断した同シールリン
グの装着状態を示す断面図 【図9】同ステップカット部分を径方向外方から見た作
動状態を示す平面図 【図10】同ステップカット部分を軸方向一方から見た
作動状態を示す正面図 【図11】従来例に係るシールリングのステップカット
部分の斜視図 【図12】同ステップカット部分を円周方向に押し開い
た状態の斜視図 【図13】同ステップカット部分を径方向外方から見た
平面図 【図14】同ステップカット部分を軸方向一方から見た
正面図 【図15】同ステップカット部分を径方向外方から見た
平面図 【図16】同ステップカット部分を軸方向一方から見た
正面図 【符号の説明】 1 シールリング 2 切断部 3 ステップカット 4 一方の切断端部 5 他方の切断端部 6,7 凹部 6a,7a 軸方向内壁面 6b 径方向内壁面 8,9 凸部 8a,9a 軸方向端面 8b,9b 内周面 10 シール面 11,12 隙間 13,14 突起 13a,14a 軸方向リップ部 13b,14b 径方向リップ部 15,16 溝 15a 軸方向溝部 15b 径方向溝部 17 装着溝 17a 内壁
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a step cut portion of a seal ring according to an embodiment of the present invention. FIG. 2 is a perspective view showing only one cut end of the seal ring. FIG. 4 is a plan view of the step cut portion viewed from the outside in the radial direction. FIG. 5 is a front view of the step cut portion viewed from one side in the axial direction. FIG. FIG. 7 is a cross-sectional view showing the mounting state of the seal ring cut along the line CC. FIG. 7 is a cross-sectional view showing the mounting state of the seal ring cut along the line DD in FIG. 5; FIG. 9 is a cross-sectional view showing the mounted state of the seal ring cut along the line E. FIG. 9 is a plan view showing the operating state of the step cut portion viewed from the outside in the radial direction. FIG. 11 is a front view showing an operating state as seen; FIG. 12 is a perspective view of the step cut portion of the seal ring when the step cut portion is pushed open in the circumferential direction. FIG. 13 is a plan view of the step cut portion viewed from the outside in the radial direction. Front view of the step cut portion viewed from one side in the axial direction [FIG. 15] Plan view of the step cut portion viewed from the outside in the radial direction [FIG. 16] Front view of the step cut portion viewed from one side in the axial direction [ DESCRIPTION OF SYMBOLS 1 Seal ring 2 Cutting part 3 Step cut 4 One cutting end 5 The other cutting end 6,7 Recess 6a, 7a Axial inner wall 6b Radial inner wall 8,9 Convex 8a, 9a End surfaces 8b, 9b Inner peripheral surface 10 Seal surfaces 11, 12 Gaps 13, 14 Protrusions 13a, 14a Axial lip portions 13b, 14b Radial lip portions 15, 16 Groove 15a Axial groove portion 15b Radial groove portion 17 Groove 17a inner wall

───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) F16J 15/16 F16J 9/16 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) F16J 15/16 F16J 9/16

Claims (1)

(57)【特許請求の範囲】 【請求項1】 円周上の一箇所で切断され、切断端部
(4)(5)のそれぞれに断面略矩形の凹部(6)
(7)および凸部(8)(9)を並べて設け、一方の切
断端部(4)の凹部(6)と他方の切断端部(5)の凸
部(9)とを係合させるとともに一方の切断端部(4)
の凸部(8)と他方の切断端部(5)の凹部(7)とを
係合させ、一方の切断端部(4)の凹部(6)の軸方向
内壁面(6a)および径方向内壁面(6b)と他方の切
断端部(5)の凸部(9)の軸方向端面(9a)および
内周面(9b)とを互いに対向させるとともに一方の切
断端部(4)の凸部(8)の軸方向端面(8a)および
内周面(8b)と他方の切断端部(5)の凹部(7)の
軸方向内壁面(7a)および径方向内壁面とを互いに対
向させてなる二段ステップ状のステップカット(3)を
設けたシールリング(1)において、 前記一方の切断端部(4)の凹部(6)の軸方向内壁面
(6a)および径方向内壁面(6b)に溝(15)を設
け、前記溝(15)は、前記凹部(6)の軸方向内壁面
(6a)に設けられた軸方向溝部(15a)と、前記凹
部(6)の径方向内壁面(6b)に設けられた径方向溝
部(15b)とを一連に有し、 前記他方の切断端部(5)の凸部(9)の軸方向端面
(9a)および内周面(9b)に、前記溝(15)に挿
入されて前記溝(15)の内面に密接する楔状の突起
(14)を設け、前記突起(14)は、前記凸部(9)
の軸方向端面(9a)に設けられて前記軸方向溝部(1
5a)に挿入される軸方向リップ部(14a)と、前記
凸部(9)の内周面(9b)に設けられて前記径方向溝
部(15b)に挿入される径方向リップ部(14b)と
を一体に有し、 前記突起(14)はシール圧力を受けて撓んで溝(1
5)の内面に密接するものである ことを特徴とするシー
ルリング。
(57) [Claim 1] A concave portion (6) cut at one location on the circumference and having a substantially rectangular cross section at each of the cut ends (4) and (5).
(7) and the projections (8) and (9) are provided side by side, and the recess (6) of one cutting end (4) and the projection (9) of the other cutting end (5) are engaged with each other. One cut end (4)
And the concave portion (7) of the other cut end (5) are engaged with each other, and the axial inner wall surface (6a) and the radial direction of the concave portion (6) of the one cut end (4) are engaged. The inner wall surface (6b) and the axial end surface (9a) and the inner peripheral surface (9b) of the projection (9) of the other cut end (5) are opposed to each other, and the protrusion of one cut end (4) is formed. The axial end surface (8a) and the inner peripheral surface (8b) of the portion (8) are opposed to the axial inner wall surface (7a) and the radial inner wall surface of the concave portion (7) of the other cut end (5). In the seal ring (1) provided with the two-step-shaped step cut (3), the inner wall surface (6a) in the axial direction and the inner wall surface (6a) in the concave portion (6) of the one cut end (4) are formed. 6b) is provided with a groove (15), and the groove (15) is provided on an axial groove (6a) provided on an axial inner wall surface (6a) of the recess (6). 15a) and a series of radial grooves (15b) provided on the radial inner wall surface (6b) of the concave portion (6), and the convex portion (9) of the other cut end (5) is formed. A wedge-shaped protrusion (14) inserted into the groove (15) and closely contacting the inner surface of the groove (15) is provided on the axial end surface (9a) and the inner peripheral surface (9b). The convex part (9)
The axial groove (1) is provided on the axial end face (9a) of the
An axial lip (14a) inserted into 5a) and a radial lip (14b) provided on the inner peripheral surface (9b) of the projection (9) and inserted into the radial groove (15b). preparative integrally includes said protrusion (14) is a groove bends undergoing sealing pressure (1
5) A seal ring which is in close contact with the inner surface of the seal ring.
JP15410895A 1995-05-30 1995-05-30 Seal ring Expired - Fee Related JP3436287B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15410895A JP3436287B2 (en) 1995-05-30 1995-05-30 Seal ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15410895A JP3436287B2 (en) 1995-05-30 1995-05-30 Seal ring

Publications (2)

Publication Number Publication Date
JPH08326923A JPH08326923A (en) 1996-12-10
JP3436287B2 true JP3436287B2 (en) 2003-08-11

Family

ID=15577107

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15410895A Expired - Fee Related JP3436287B2 (en) 1995-05-30 1995-05-30 Seal ring

Country Status (1)

Country Link
JP (1) JP3436287B2 (en)

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