JP3389403B2 - Seal ring - Google Patents

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、たとえば自動車の
自動変速機等のシール部に用いられるシールリングに関
し、特にシールリングの切断部の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal ring used for a seal portion of, for example, an automatic transmission of an automobile, and more particularly to a structure of a cut portion of the seal ring.

【０００２】[0002]

【従来の技術】自動変速機等に用いられるシールリング
は、装着性の問題から円周上の１箇所を切断したものが
一般的である。切断部のあるシールリングからの漏れ
は、切断部からの漏れが大半であり、シール性を改善す
るためには、切断部からの漏れを低減する必要がある。2. Description of the Related Art Generally, a seal ring used in an automatic transmission or the like is cut at one position on the circumference because of a problem of mounting. Most of the leakage from the seal ring having the cut portion is from the cut portion, and in order to improve the sealing property, it is necessary to reduce the leak from the cut portion.

【０００３】シールリングの切断部の形状としては、切
断部の方向をシールリングの円周方向と直交するストレ
ートカットや、切断部の方向をシールリングの円周方向
に対して斜め方向とするバイアスカットが一般的であっ
たが、いずれも温度が変化した場合にシールリングの周
長が変化するために切断部に大きな隙間が生じ、漏れが
増大する。The shape of the cut portion of the seal ring may be a straight cut in which the direction of the cut portion is orthogonal to the circumferential direction of the seal ring, or a bias in which the direction of the cut portion is oblique to the circumferential direction of the seal ring. Cutting was common, but in both cases, when the temperature changes, the circumferential length of the seal ring changes, so that a large gap is created in the cut portion and leakage increases.

【０００４】そこで、温度が変化しても切断部からの漏
れが生じないカット形状として、図８に示すような特殊
ステップカットが知られている。Therefore, a special step cut as shown in FIG. 8 is known as a cut shape in which leakage from the cut portion does not occur even if the temperature changes.

【０００５】すなわち、このシールリングは軸１１０と
ハウジング１１１間の環状隙間１１２をシールするもの
で、リング本体１１４は軸１１０外周に前記環状隙間１
１２に臨接して設けられた環状の装着溝１１３内に軸方
向に移動自在に装着される。That is, this seal ring seals the annular gap 112 between the shaft 110 and the housing 111, and the ring body 114 has the annular gap 1 on the outer periphery of the shaft 110.
It is mounted movably in the axial direction in an annular mounting groove 113 provided adjacent to 12.

【０００６】このリング本体１１４の装着溝１１３の開
口側に位置する外周面１１５が、装着溝１１３の奥側に
位置する内周面１１６に作用する流体圧によって環状隙
間１１２を横切ってハウジング１１１内周に密封状態に
圧接されて径方向シール部Ｓ1を構成している。また、
リング本体１１４の軸方向一側面１１７が、軸方向他側
面１１８に作用する流体圧によって装着溝１１３の一方
の内側壁１１９に密封状態に圧接されて軸方向シール部
Ｓ2を構成している。The outer peripheral surface 115 of the ring body 114, which is located on the opening side of the mounting groove 113, crosses the annular gap 112 by the fluid pressure acting on the inner peripheral surface 116 located on the inner side of the mounting groove 113, and inside the housing 111. It is pressed against the circumference in a sealed state to form a radial seal portion S1. Also,
One axial side surface 117 of the ring body 114 is hermetically pressed against one inner side wall 119 of the mounting groove 113 by fluid pressure acting on the other axial side surface 118 to form an axial seal portion S2.

【０００７】前記リング本体１１４は周方向の一箇所に
て切断され、対向する切断端部間には、互いに嵌合し合
う２組の円弧状凸部１２０と円弧状凹部１２１が設けら
れている。円弧状凸部１２０と円弧状凹部１２２間に
は、軸方向および径方向への相対移動を規制しかつ円周
方向への相対移動を可能とする軸方向および径方向合わ
せ面１２３，１２４が設けられ、円弧状凸部１２０と円
弧状凹部１２２間の円周方向の相対移動によって温度変
化によるリング本体１１４の周長変化を吸収するように
なっていた。The ring body 114 is cut at one position in the circumferential direction, and two sets of arc-shaped projections 120 and arc-shaped recesses 121 which are fitted to each other are provided between the cut ends facing each other. . Between the arc-shaped convex portion 120 and the arc-shaped concave portion 122, there are provided axial-direction and radial-direction mating surfaces 123 and 124 that restrict relative movement in the axial direction and the radial direction and enable relative movement in the circumferential direction. Thus, the relative movement in the circumferential direction between the arc-shaped convex portion 120 and the arc-shaped concave portion 122 absorbs the change in the circumferential length of the ring body 114 due to the temperature change.

【０００８】[0008]

【発明が解決しようとする課題】しかしながら、上記し
た従来の特殊ステップカット形状のシールリングの場合
には、円弧状凸部１２０と円弧状凹部１２２が所定の寸
法形状に製作されていれば、円弧状凸部１２０と円弧状
凹部１２２の接続部においても、径方向および軸方向シ
ール部Ｓ1，Ｓ2を構成するリング本体１１４の外周面１
１５および側面１１７が段差の無い連続面となって、径
方向および軸方向シール部Ｓ1，Ｓ2に隙間が生じないこ
とになるが、円弧状凸部１２０と円弧状凹部１２２を理
想的な寸法形状に精密に加工することは困難で、現実に
は加工誤差によって隙間の発生は避けられない。However, in the case of the above-mentioned conventional special step cut shape seal ring, if the arcuate convex portion 120 and the arcuate concave portion 122 are manufactured in a predetermined size and shape, they are circular. The outer peripheral surface 1 of the ring body 114, which constitutes the radial and axial seal portions S1 and S2, also at the connecting portion between the arcuate convex portion 120 and the arcuate concave portion 122.
15 and the side surface 117 are continuous surfaces without steps, and no gap is created between the radial and axial seal portions S1 and S2. However, the arcuate convex portion 120 and the arcuate concave portion 122 have ideal dimensions and shapes. It is difficult to machine precisely, and in reality, a gap is inevitable due to a machining error.

【０００９】すなわち、図８(ａ)，(ｂ)に示すように、
円弧状凸部１２０の径方向厚さが円弧状凹部１２２の径
方向深さよりも大きい場合には、円弧状凸部１２０がリ
ング本体１１４の外周面１１５に段差δが発生し、段差
δ部分においてハウジング１１１の内周面との間に隙間
ｇが発生する。That is, as shown in FIGS. 8 (a) and 8 (b),
When the radial thickness of the arcuate protrusion 120 is larger than the radial depth of the arcuate recess 122, the arcuate protrusion 120 causes a step δ on the outer peripheral surface 115 of the ring body 114, and at the step δ portion. A gap g is generated between the inner peripheral surface of the housing 111.

【００１０】逆に、円弧状凸部１２０の径方向厚さが円
弧状凹部１２２の径方向深さよりも小さい場合には、図
示しないが、円弧状凸部１２０外周面がリング本体１１
４の外周面よりも円弧状凹部１２２内に沈み、やはりハ
ウジング１１１の内周面との間に隙間が発生する。On the contrary, when the radial thickness of the arcuate projection 120 is smaller than the radial depth of the arcuate recess 122, although not shown, the outer peripheral surface of the arcuate projection 120 is the ring body 11.
The inner peripheral surface of the housing 111 also has a gap with the inner peripheral surface of the housing 111.

【００１１】一方、円弧状凸部１２０の軸方向厚さが円
弧状凹部１２２の軸方向深さよりも大きい場合には、図
８(ｃ)に示すように、円弧状凸部１２０がリング本体１
１４の側面１１７に段差δが生じ、その段差部分におい
て装着溝１１３の内側壁１１９との間に隙間ｇが生じ
る。On the other hand, when the thickness of the arcuate projection 120 in the axial direction is larger than the depth of the arcuate recess 122 in the axial direction, the arcuate projection 120 is formed in the ring body 1 as shown in FIG. 8 (c).
A step δ is generated on the side surface 117 of 14, and a gap g is formed between the side surface 117 and the inner wall 119 of the mounting groove 113 at the step portion.

【００１２】逆に、円弧状凸部１２０の軸方向厚さが円
弧状凹部１２２の軸方向深さよりも小さい場合には、図
示しないが、円弧状凸部１２０がリング本体１１４の側
面に沈み込み、やはり装着溝１１３の内側壁１１９との
間に隙間ｇが生じてしまう。On the contrary, when the axial thickness of the arcuate projection 120 is smaller than the axial depth of the arcuate recess 122, the arcuate projection 120 sinks into the side surface of the ring body 114, though not shown. As a result, a gap g is formed between the mounting groove 113 and the inner wall 119.

【００１３】本発明は上記した従来の問題点を解決する
ためになされたもので、その目的とするところは、リン
グ本体の切断端部の形状を温度変化による影響の無い形
状とし、しかも加工誤差による影響の無い切断端部形状
を有するシールリングを提供することにある。The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to make the shape of the cut end of the ring main body into a shape which is not influenced by the temperature change, and yet to have a processing error. It is an object of the present invention to provide a seal ring having a cut end shape that is not affected by.

【００１４】[0014]

【課題を解決するための手段】上記目的を達成するため
に、本発明にあっては、リング本体の軸方向一側面を、
軸方向他側面に作用する流体圧によって装着溝の一方の
内側壁に密封状態に圧接して軸方向シール部を構成し、
前記リング本体を周方向の一箇所にて切断し、一方の切
断端部に円周方向に部分的に突出する円弧状凸部を設け
ると共に、他方の切断端部に前記円弧状凸部に対応する
円弧状凹部を設け、前記円弧状凸部と円弧状凹部間に、
軸方向および径方向への相対移動を規制しかつ円周方向
への相対移動を可能とする合わせ面を設け、前記円弧状
凸部と円弧状凹部間の円周方向の相対移動によって温度
変化によるリング本体の周長変化を吸収するシールリン
グにおいて、前記円弧状凸部の径方向の厚さを前記円弧
状凹部の径方向の深さより小さく、および／または、前
記円弧状凸部の軸方向の厚さを前記円弧状凹部の軸方向
の深さより小さくなるように設け、前記円弧状凸部と円
弧状凹部の合わせ面間に、該合わせ面間のシール状態を
維持しつつ軸方向および径方向に変形可能で、かつ、前
記円弧状凹部の径方向の深さと前記円弧状凸部の径方向
の厚さとの差より大きい、および／または、前記円弧状
凹部の軸方向の深さと前記円弧状凸部の軸方向の厚さと
の差より大きい高さを有するシール用突起を設け、該シ
ール用突起によって円弧状凸部を円弧状凹部から径方向
および軸方向に突出させて段差を形成し、リング本体に
加わる径方向および軸方向の流体圧によって前記シール
用突起を変形させて段差を吸収可能としたことを特徴と
する。In order to achieve the above object, in the present invention, one side surface in the axial direction of the ring main body is
By fluid pressure acting on the other side surface in the axial direction, it is pressed against one inner wall of the mounting groove in a sealed state to form an axial seal portion,
The ring body is cut at one location in the circumferential direction, and one cutting end portion is provided with an arc-shaped convex portion that partially projects in the circumferential direction, and the other cutting end portion corresponds to the arc-shaped convex portion. An arc-shaped concave portion is provided, and between the arc-shaped convex portion and the arc-shaped concave portion,
A mating surface that restricts relative movement in the axial direction and the radial direction and allows relative movement in the circumferential direction is provided, and due to the relative movement in the circumferential direction between the arcuate convex portion and the arcuate concave portion, temperature change is caused. In a seal ring that absorbs changes in the circumferential length of the ring body, the radial thickness of the arc-shaped convex portion
Smaller than the radial depth of the concavity and / or in front
The thickness in the axial direction of the arc-shaped convex portion is defined as the axial direction of the arc-shaped concave portion.
Is provided so as to be smaller than the depth of, and is deformable in the axial direction and the radial direction between the mating surfaces of the arcuate convex portion and the arcuate concave portion while maintaining the sealing state between the mating surfaces , and
The radial depth of the arcuate concave portion and the radial direction of the arcuate convex portion
Greater than the thickness difference and / or the arc shape
The axial depth of the concave portion and the axial thickness of the arc-shaped convex portion
A sealing protrusion having a height larger than the difference between the circular protrusions is formed by the sealing protrusion to project the arcuate convex portion from the arcuate concave portion in the radial direction and the axial direction to form a step on the ring body.
It is characterized in that the sealing projection is deformed by the applied fluid pressure in the radial direction and the axial direction so that the step can be absorbed.

【００１５】本発明のシールリングは、互いに同心的に
相対移動自在に組み付けられる２部材間の環状隙間をシ
ールするもので、リング本体が２部材の内の一方の部材
に設けられた環状の装着溝内に軸方向に移動自在に装着
される。そして、リング本体の装着溝の開口側に位置す
る一方の径方向端部周面が、装着溝の奥側に位置する他
方の径方向端部周面に作用する流体圧によって、２部材
の内の他方の部材に圧接されて径方向シール部を構成
し、リング本体の軸方向一側面が、軸方向他側面に作用
する流体圧によって装着溝の一方の内側壁に圧接されて
軸方向シール部を構成する。The seal ring of the present invention seals the annular gap between the two members which are concentrically and relatively movable to each other, and the ring body is an annular mount provided on one of the two members. It is mounted in the groove so as to be movable in the axial direction. Then, one of the radial end peripheral surfaces located on the opening side of the mounting groove of the ring main body is moved by the fluid pressure acting on the other radial end peripheral surface located on the rear side of the mounting groove, so To form a radial seal portion, and one side surface of the ring body in the axial direction is pressed into contact with one inner wall of the mounting groove by fluid pressure acting on the other side surface in the axial direction. Make up.

【００１６】リング本体の切断端部間は、円弧状凸部と
円弧状凹部との嵌合によって接続される、この円弧状凸
部と円弧状凹部間の円周方向の相対移動によって温度変
化に起因するリング本体の周長変化が吸収される。The cut ends of the ring body are connected by fitting the arcuate projection and the arcuate recess. The relative movement in the circumferential direction between the arcuate projection and the arcuate recess causes a temperature change. The change in the circumferential length of the ring body caused by the change is absorbed.

【００１７】一方、円弧状凸部と円弧状凹部を嵌合させ
ただけの状態では、シール用突起によって円弧状凸部を
円弧状凹部から径方向および軸方向に持ち上げられて段
差が形成されているが、上記したようにリング本体に径
方向および軸方向の流体圧が作用すると、シール用突起
が径方向および軸方向に変形して段差が吸収され、リン
グ本体の径方向シール部および軸方向シール部が全周に
わたって隙間無く密着する。On the other hand, when the arcuate projection and the arcuate recess are simply fitted together, the sealing projection lifts the arcuate projection from the arcuate recess in the radial direction and the axial direction to form a step. However, as described above, when fluid pressure acts on the ring body in the radial and axial directions, the sealing projection is deformed in the radial and axial directions to absorb the step, and the radial seal part and axial direction of the ring body are absorbed. The seal part is tightly attached over the entire circumference.

【００１８】円弧状凸部と円弧状凹部の合わせ面は、径
方向に接触する径方向合わせ面と、該径方向合わせ面と
隣接する軸方向に接触する軸方向合わせ面とから構成さ
れ、径方向合わせ面間にはシール用突起として径方向に
変形可能な径方向突起を、軸方向合わせ面間にはシール
用突起として軸方向に変形可能な軸方向突起を設けるこ
とが好適である。The mating surface of the arcuate convex portion and the arcuate recessed portion is composed of a radial mating surface that contacts the radial direction and an axial mating surface that is adjacent to the radial mating surface and that contacts in the axial direction. It is preferable to provide radial projections that are radially deformable as sealing projections between the alignment surfaces and axial projections that are axially deformable as sealing projections between the axial alignment surfaces.

【００１９】このように径方向と軸方向の合わせ面を分
ければ、リング本体に作用する径方向および軸方向の流
体圧が、それぞれ径方向および軸方向突起の変形に効率
的に作用し、より確実に段差を解消できる。If the mating surfaces in the radial direction and the axial direction are separated in this way, the radial and axial fluid pressures acting on the ring body efficiently act on the deformations of the radial and axial projections, respectively. You can surely eliminate the step.

【００２０】[0020]

【発明の実施の形態】以下に本発明を図示の実施の形態
に基づいて説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the illustrated embodiments.

【００２１】図１には本発明の実施の形態に係るシール
リングが示されている。このシールリングは、互いに同
心的に相対移動自在に組み付けられる２部材としてのハ
ウジング２と軸３間の環状隙間４をシールするもので、
樹脂製の環状のリング本体５を有し、リング本体５が２
部材の内の一方の部材としての軸３外周に設けられた環
状の装着溝６内に軸方向に移動自在に装着される。FIG. 1 shows a seal ring according to an embodiment of the present invention. This seal ring seals an annular gap 4 between a housing 2 and a shaft 3, which are two members that are concentrically assembled to each other and are relatively movable.
It has an annular ring body 5 made of resin, and the ring body 5 has two
It is mounted movably in the axial direction in an annular mounting groove 6 provided on the outer periphery of the shaft 3 as one of the members.

【００２２】装着溝６は環状隙間４に臨接して開口する
断面矩形状の溝で、径方向に延びる一対の環状の内側壁
６１，６２と、軸方向に延びる円筒状の底壁６３と、か
ら構成されている。一方、リング本体５は装着溝６の断
面形状よりも小さい断面四角形状の部材で、軸方向長さ
（幅）が装着溝６の内側壁６１，６２間の開口幅よりも
小さく、内径が装着溝６の底壁６３の径よりも大きく、
外径がハウジング２の内孔の孔径よりも若干大径となっ
ている。The mounting groove 6 is a groove having a rectangular cross section, which is open in contact with the annular gap 4, and has a pair of radially inner annular side walls 61 and 62, and an axially extending cylindrical bottom wall 63. It consists of On the other hand, the ring body 5 is a member having a quadrangular cross section smaller than the cross-sectional shape of the mounting groove 6, the axial length (width) is smaller than the opening width between the inner side walls 61 and 62 of the mounting groove 6, and the inner diameter is mounted. Larger than the diameter of the bottom wall 63 of the groove 6,
The outer diameter is slightly larger than the inner diameter of the housing 2.

【００２３】そして、リング本体５の前記装着溝６の開
口側に位置する一方の径方向端部周面としての外周面５
３が、装着溝６の奥側に位置する他方の径方向端部周面
としての内周面５４に作用する流体圧によって環状隙間
４を横切ってハウジング２の内周面に対して径方向に密
封状態に圧接され、径方向シール部Ｓ1を構成してい
る。Then, the outer peripheral surface 5 as the peripheral surface of the one radial end located on the opening side of the mounting groove 6 of the ring body 5.
3 crosses the annular gap 4 in the radial direction with respect to the inner peripheral surface of the housing 2 by the fluid pressure acting on the inner peripheral surface 54 as the other radial end peripheral surface located on the inner side of the mounting groove 6. It is pressure-contacted in a sealed state to form a radial direction seal portion S1.

【００２４】また、リング本体５の軸方向一側面５１
が、軸方向他側面５２に作用する流体圧によって装着溝
６の一方の内側壁６１に密封状態に圧接されて軸方向シ
ール部Ｓ2を構成している。Further, one axial side surface 51 of the ring body 5
However, the fluid pressure acting on the other side surface 52 in the axial direction presses the one inner wall 61 of the mounting groove 6 in a sealed state to form the axial seal portion S2.

【００２５】リング本体５はその円周方向の一箇所にて
切断され、対向する切断端部間には、互いに円周方向に
嵌合する円弧状凸部７と円弧状凹部８が２組設けられて
いる。The ring body 5 is cut at one position in the circumferential direction, and two sets of arc-shaped projections 7 and arc-shaped recesses 8 which are fitted in the circumferential direction are provided between the cut ends facing each other. Has been.

【００２６】これら２組の円弧状凸部７と円弧状凹部８
は同一形状寸法を有し、リング本体５の四角形断面の外
径側半部に軸方向に互いに隣接して設けられ、しかも各
円弧状凸部７と円弧状凹部８の位置が互いに逆の切断端
部に設けられている。したがって、リング本体５の一方
の切断端部には、１組目の円弧状凸部７と２組目の円弧
状凹部８が隣接して形成され、他方の切断端部には１組
目の円弧状凹部７と２組目の円弧状凸部８が隣接して形
成される関係にある。These two sets of arc-shaped convex portion 7 and arc-shaped concave portion 8
Have the same shape and dimensions, and are provided axially adjacent to each other on the outer diameter side half of the quadrangular cross section of the ring main body 5, and the positions of the arcuate convex portions 7 and the arcuate concave portions 8 are opposite to each other. It is provided at the end. Therefore, the first set of arcuate convex portions 7 and the second set of arcuate concave portions 8 are formed adjacent to each other at one cut end of the ring body 5, and the first set of the other cut end is formed. The arcuate concave portion 7 and the second set of arcuate convex portions 8 are formed adjacent to each other.

【００２７】各円弧状凸部７はリング本体５の断面形状
の略１／４程度の断面四角形状となっており、各円弧状
凹部８も円弧状凸部７に対応する断面四角形状に成形さ
れている。一方の円弧状凸部７は、リング本体５の外周
面５３と軸方向シール部Ｓ2を構成する側面５１との角
部に設けられ、他方の円弧状凸部７は、リング本体５の
外周面５３と軸方向シール部Ｓ2とは反対側の側面５２
との角部に設けられている。Each arcuate convex portion 7 has a quadrangular cross section that is approximately 1/4 of the cross-sectional shape of the ring body 5, and each arcuate concave portion 8 is also formed in a quadrangular cross section corresponding to the arcuate convex portion 7. Has been done. One arcuate convex portion 7 is provided at a corner between the outer peripheral surface 53 of the ring body 5 and the side surface 51 forming the axial seal portion S2, and the other arcuate convex portion 7 is an outer peripheral surface of the ring main body 5. 53 and the side surface 52 opposite to the axial seal portion S2
It is provided at the corner of and.

【００２８】これら２組の円弧状凸部７と円弧状凹部８
は、軸方向および径方向への相対移動を規制しかつ円周
方向への相対移動を可能とする径方向および軸方向合わ
せ面７１，８１；７２，８２が設けられ、この２組の円
弧状凸部７と円弧状凹部８の円周方向の相対移動によっ
て温度変化によるリング本体５の周長変化を吸収するよ
うになっている。These two sets of arc-shaped convex portion 7 and arc-shaped concave portion 8
Is provided with radial and axial mating surfaces 71, 81; 72, 82 that restrict relative movement in the axial and radial directions and allow relative movement in the circumferential direction. The relative movement of the convex portion 7 and the arc-shaped concave portion 8 in the circumferential direction absorbs the change in the circumferential length of the ring body 5 due to the temperature change.

【００２９】リング本体５の対向する各切断端部に、互
いに隣接して設けられる円弧状凸部７と円弧状凹部８の
軸方向合わせ面７２，８２は円周方向に連続する一つの
平面となっている。At each of the opposite cut ends of the ring body 5, the arcuate convex portions 7 and the arcuate concave portions 8 provided adjacent to each other have the axial alignment surfaces 72 and 82 which are one flat surface continuous in the circumferential direction. Has become.

【００３０】そして、円弧状凸部７と円弧状凹部８の径
方向合わせ面７１，８１間にはシール用突起として径方
向に変形可能な径方向突起９が、軸方向合わせ面７２，
８２間にはシール用突起として軸方向に変形可能な軸方
向突起１０がそれぞれ設けられている。これら径方向お
よび軸方向突起９，１０の変形は弾性変形させてもよい
し、塑性変形させてもよい。Between the radial mating surfaces 71, 81 of the arcuate convex portion 7 and the arcuate concave portion 8, there is a radial projection 9 which is radially deformable as a sealing projection, and the axial mating surfaces 72, 81.
Axial projections 10 that can be deformed in the axial direction are provided between 82 as sealing projections. The radial and axial projections 9 and 10 may be deformed elastically or plastically.

【００３１】これら径方向および軸方向突起９，１０は
各径方向および軸方向合わせ面７１，８１；７２，８２
の周縁を取り囲むように形成されるビード状突起で、互
いに接触する合わせ面の一方に設けられる。突起形状は
特に限定されず、断面矩形状だけでなく、図４(ｂ)〜
(ｄ)に示すように、三角形，台形，半円形種々の断面形
状をとり得る。These radial and axial projections 9 and 10 are provided with radial and axial mating surfaces 71 and 81; 72 and 82, respectively.
Bead-shaped projections formed so as to surround the peripheral edge of each of the mating surfaces of the mating surfaces of the mating surfaces. The shape of the protrusion is not particularly limited, and the shape of the protrusion is not limited to the rectangular shape, and the shape of
As shown in (d), it can have various sectional shapes such as a triangle, a trapezoid, and a semicircle.

【００３２】この径方向および軸方向突起９，１０のパ
ターンとしては、各径方向および軸方向合わせ面７１，
８１；７２，８２を全周的に取り囲む形状だけでなく、
合わせ面間の流体漏れを防止できればよく、たとえば図
５に示すような構成としてもよい。As the pattern of the radial and axial projections 9 and 10, the radial and axial mating surfaces 71,
81; 72, 82 as well as the shape that surrounds the entire circumference,
It suffices to prevent fluid leakage between the mating surfaces, and for example, the structure shown in FIG. 5 may be adopted.

【００３３】すなわち、図５(ａ)〜(ｅ)に示す例は、円
弧状凹部８の径方向および軸方向合わせ面８１，８２の
中途部に一箇所だけ、各径方向および軸方向突起９，１
０を円周方向に対して直交する方向に連続的に形成した
ものである。That is, in the example shown in FIGS. 5 (a) to 5 (e), the radial and axial projections 9 are provided only at one location in the radial and axial mating surfaces 81 and 82 of the arcuate recess 8. , 1
0 is continuously formed in the direction orthogonal to the circumferential direction.

【００３４】また、図５(ｆ)〜(ｊ)に示す例は、円弧状
凸部７の径方向および軸方向合わせ面７１，７２の先端
部に一箇所だけ、各径方向および軸方向突起９，１０を
円周方向に対して直交する方向に連続的に形成したもの
である。Further, in the example shown in FIGS. 5 (f) to 5 (j), the radial and axial projections are provided only once at the distal end of the radial and axial mating surfaces 71 and 72 of the arcuate convex portion 7. 9, 10 are continuously formed in a direction orthogonal to the circumferential direction.

【００３５】径方向突起９は、たとえば、図４(ａ)に示
すように、寸法公差の範囲で円弧状凸部７の径方向厚さ
Ａが円弧状凹部８の径方向深さＤより必ず小さくし、か
つ前記径方向突起ｔ1の高さをＤ−Ａよりも大きくして
円弧状凸部７が必ずδ1だけ円弧状凹部８から突出する
ように設定し、さらにδ1を吸収するためにδ1よりもｔ
1が大きくなるような寸法関係に設定しておけばよい。In the radial projection 9, for example, as shown in FIG. 4A, the radial thickness A of the arcuate convex portion 7 is always larger than the radial depth D of the arcuate concave portion 8 within the range of dimensional tolerance. The height of the radial projection t1 is made smaller than that of D-A so that the arcuate convex portion 7 always protrudes from the arcuate concave portion 8 by δ1, and δ1 is absorbed to absorb δ1. Than t
The size relationship should be set so that 1 becomes larger.

【００３６】また、軸方向突起１０は、寸法公差の範囲
で円弧状凸部７の軸方向厚さＢが円弧状凹部８の軸方向
深さＣより必ず小さくし、かつ前記軸方向突起ｔ2の高
さをＣ−Ｂよりも大きくして円弧状凸部７が必ずδ2だ
け円弧状凹部８から軸方向に突出するように設定し、さ
らにδ2を吸収するためにδ2よりもｔ2が大きくなるよ
うな寸法関係に設定しておけばよい。In the axial projection 10, the axial thickness B of the arcuate convex portion 7 must be smaller than the axial depth C of the arcuate concave portion 8 within the range of dimensional tolerance, and the axial projection t2 of The height is set to be larger than CB so that the arcuate convex portion 7 always protrudes from the arcuate concave portion 8 by δ2, and t2 is larger than δ2 to absorb δ2. It is sufficient to set it to a proper dimensional relationship.

【００３７】本発明にあっては、円弧状凸部７と円弧状
凹部８間の円周方向の相対移動によって温度変化に起因
するリング本体５の周長変化が吸収される。In the present invention, the relative movement in the circumferential direction between the arcuate convex portion 7 and the arcuate concave portion 8 absorbs the change in the circumferential length of the ring body 5 caused by the change in temperature.

【００３８】円弧状凸部７と円弧状凹部８を嵌合させた
だけの状態では、図１(ａ)〜(ｃ)に示すように、シール
用突起９，１０によって円弧状凸部７を円弧状凹部８か
ら径方向および軸方向に持ち上げられて段差δ1，δ2が
形成されている。In the state where the arcuate convex portion 7 and the arcuate concave portion 8 are simply fitted together, as shown in FIGS. 1A to 1C, the arcuate convex portion 7 is formed by the sealing projections 9 and 10. Raised in the radial direction and the axial direction from the arcuate recess 8 to form steps δ1 and δ2.

【００３９】一方、リング本体５に径方向および軸方向
の流体圧Ｐ1，Ｐ2が作用すると、図１(ｄ)〜(ｆ)に示す
ように、シール用の径方向および軸方向突起９，１０が
径方向および軸方向に弾性変形あるいは塑性変形して段
差δ1，δ2が吸収され、リング本体５の径方向シール部
Ｓ1および軸方向シール部Ｓ2を構成する外周面５３およ
び側面５１がハウジング２内周面および装着溝６の内側
壁６１に対して全周にわたって完全に密着してシールさ
れる。On the other hand, when the radial and axial fluid pressures P1 and P2 are applied to the ring body 5, as shown in FIGS. 1 (d) to 1 (f), radial and axial projections 9 and 10 for sealing are provided. Is elastically or plastically deformed in the radial direction and the axial direction to absorb the steps δ1, δ2, and the outer peripheral surface 53 and the side surface 51 forming the radial seal portion S1 and the axial seal portion S2 of the ring body 5 are inside the housing 2. The inner surface 61 of the mounting groove 6 and the peripheral surface are completely adhered to and sealed over the entire circumference.

【００４０】［他の実施の形態］上記実施の形態では、
シールリングを軸３外周に設けた装着溝６内に装着する
場合について説明したが、図６に示すように、ハウジン
グ２内周に設けた装着溝６内に装着してもよい。[Other Embodiments] In the above embodiment,
Although the case where the seal ring is mounted in the mounting groove 6 provided on the outer circumference of the shaft 3 has been described, it may be mounted in the mounting groove 6 provided on the inner circumference of the housing 2 as shown in FIG. 6.

【００４１】この場合にはリング本体５の一方の軸方向
端部周面である内周面５４が軸３外周面に密封接触して
径方向シール部Ｓ1を構成することになり、円弧状凸部
７はリング本体５の内周側半部に設けられ、円弧状凹部
８も円弧状凸部７に対応してリング本体５の内周側半部
に設けられる。In this case, the inner peripheral surface 54, which is the peripheral surface of one end of the ring body 5 in the axial direction, comes into sealing contact with the outer peripheral surface of the shaft 3 to form the radial seal portion S1. The portion 7 is provided on the inner peripheral side half of the ring body 5, and the arcuate concave portion 8 is also provided on the inner peripheral side half of the ring main body 5 corresponding to the arcuate convex portion 7.

【００４２】その他の構成および作用については上記実
施の形態と同様なので、同一の構成部分については同一
の符号を付してその説明を省略する。Since other structures and operations are the same as those of the above-mentioned embodiment, the same components are designated by the same reference numerals and the description thereof will be omitted.

【００４３】なお、上記各実施の形態では、円弧状凸部
７と円弧状凹部８を２組設けた場合を例にとって説明し
たが、円弧状凸部７と円弧状凹部８が一組でもよい。In each of the above embodiments, the case where two sets of the arc-shaped convex portion 7 and the arc-shaped concave portion 8 are provided has been described as an example, but the arc-shaped convex portion 7 and the arc-shaped concave portion 8 may be one set. .

【００４４】また、上記実施の形態では、円弧状凸部７
と円弧状凹部８を断面四角形状として、合わせ面形状と
して、径方向および軸方向合わせ面を分けているが、図
７(ａ)，(ｂ)に示すように円弧状合わせ面１１ａ，１１
ｂとして軸方向および径方向の位置決めをするようにし
てもよいし、場合によっては、図７(ｃ)，(ｄ)に示すよ
うに、傾斜合わせ面１２ａ，１２ｂとしてもよい。要す
るに径方向および軸方向の位置決めをしつつ円周方向の
相対移動を許容できればよい。円弧状合わせ面１１ｂに
はシール用突起１３が、傾斜合わせ面１２ｂにはシール
用突起１４が、それぞれ設けられる。In the above embodiment, the arcuate convex portion 7
Although the circular concave section 8 has a quadrangular cross section and the radial and axial mating surfaces are separated as mating surface shapes, as shown in FIGS. 7 (a) and 7 (b), the arc mating surfaces 11a and 11 are formed.
Positioning in the axial direction and the radial direction may be performed as b, or in some cases, as shown in FIGS. 7 (c) and 7 (d), the inclined matching surfaces 12a and 12b may be used. In short, it suffices if relative movement in the circumferential direction can be permitted while positioning in the radial direction and the axial direction. The arcuate mating surface 11b is provided with a sealing projection 13 and the inclined mating surface 12b is provided with a sealing projection 14.

【００４５】[0045]

【発明の効果】以上説明したように、本発明によれば、
円弧状凸部と円弧状凹部間の円周方向の相対移動によっ
て温度変化に起因するリング本体の周長変化を吸収する
ことができ、また、円弧状凸部と円弧状凹部の合わせ面
間にシール用突起を設け、流体圧によってシール用突起
を変形させて円弧状凸部と円弧状凹部間の段差を吸収す
るようにしたので、円弧状凸部と円弧状凹部の加工誤差
に拘らず径方向シール部および軸方向シール部を完全に
密着させることができ、シール性向上を図ることができ
る。As described above, according to the present invention,
The relative movement in the circumferential direction between the arc-shaped convex portion and the arc-shaped concave portion can absorb the change in the circumferential length of the ring main body due to the temperature change, and also, between the arc-shaped convex portion and the arc-shaped concave portion. Since the sealing projection is provided and the sealing projection is deformed by the fluid pressure to absorb the step between the arc-shaped convex portion and the arc-shaped concave portion, the diameter is maintained regardless of the processing error of the arc-shaped convex portion and the arc-shaped concave portion. The directional seal portion and the axial seal portion can be brought into close contact with each other, and the sealing performance can be improved.

【００４６】また、径方向と軸方向の合わせ面を分ける
構成とすれば、リング本体に作用する径方向および軸方
向の流体圧が、それぞれ径方向および軸方向突起の変形
に効率的に作用し、より確実に段差を解消できる。If the radial and axial mating surfaces are separated, the radial and axial fluid pressures acting on the ring body efficiently act on the deformation of the radial and axial projections, respectively. , The step can be eliminated more reliably.

【図面の簡単な説明】[Brief description of drawings]

【図１】図１は本発明の実施の形態に係るシールリング
の使用状態を示す図で、同図(ａ)は流体圧が作用しない
自由状態の要部断面図、同図(ｂ)，(ｃ)は同図(ａ)のｂ
−ｂ線，ｃ−ｃ線断面図、同図(ｄ)は流体圧が作用した
状態の要部断面図、同図(ｅ)，(ｆ)は同図(ｄ)のｅ−ｅ
線，ｆ−ｆ線断面図である。FIG. 1 is a view showing a usage state of a seal ring according to an embodiment of the present invention, FIG. 1 (a) is a sectional view of a main part in a free state where a fluid pressure does not act, FIG. 1 (b), (c) is b in the same figure (a)
-B line, cc line sectional view, the same figure (d) is a principal part sectional view in the state where the fluid pressure acts, and the same figures (e) and (f) are ee of the same figure (d).
FIG. 6 is a sectional view taken along the line ff.

【図２】図２(ａ)は図１のシールリングの切断端部を示
す斜視図、同図(ｂ)は同図(ａ)のｂーｂ線断面図、同図
(ｃ)は同図(ａ)のｃーｃ線断面図、同図(ｄ)は同図(ａ)
のｄーｄ線断面図、同図(ｅ)は同図(ａ)のｅ−ｅ線断面
図である。2 (a) is a perspective view showing a cut end portion of the seal ring of FIG. 1, FIG. 2 (b) is a sectional view taken along line bb of FIG. 2 (a), and FIG.
(c) is a sectional view taken along the line c-c of (a) of the same figure, and (d) of the same figure is (a) of the same figure.
3 is a cross-sectional view taken along line dd of FIG. 3A, and FIG. 3E is a cross-sectional view taken along line ee of FIG.

【図３】図３(ａ)は図１のシールリングの全体構成を示
す図、同図(ｂ)，(ｃ)は切断端部を離した状態の部分正
面図および部分平面図である。3 (a) is a diagram showing the overall configuration of the seal ring of FIG. 1, and FIGS. 3 (b) and 3 (c) are a partial front view and a partial plan view with the cut ends separated.

【図４】図４(ａ)は図１のシールリングのシール用突起
の寸法関係の説明図、同図(ｂ)〜(ｄ)はシール用突起の
断面形状の変形例を示す図である。4 (a) is an explanatory view of the dimensional relationship of the sealing projections of the seal ring of FIG. 1, and FIGS. 4 (b) to 4 (d) are views showing modified examples of the sectional shape of the sealing projections. .

【図５】図５(ａ)〜(ｅ)はシール用突起の他のパターン
を示す図であり、同図(ａ)はリング本体の一方の切断端
部の平面図、同図(ｂ)は同図(ａ)のｂ方向矢視図、同図
(ｃ)は他方の切断端部の平面図、同図(ｄ)は同図(ｃ)の
Ｄ方向矢視図、同図(ｅ)はｅ−ｅ線断面図、図５(ｆ)〜
(ｊ)はシール用突起のさらに他のパターンを示す図であ
り、同図(ｆ)はリング本体の一方の切断端部の平面図、
同図(ｇ)は同図(ｆ)のｇ方向矢視図、同図(ｈ)は他方の
切断端部の平面図、同図(ｉ)は同図(ｈ)のＩ方向矢視
図、同図(ｊ)はｊ−ｊ線断面図である。5 (a) to 5 (e) are views showing another pattern of the protrusion for sealing, FIG. 5 (a) is a plan view of one cut end of the ring body, and FIG. 5 (b). Is a view in the direction of arrow b in FIG.
5C is a plan view of the other cut end portion, FIG. 7D is a view taken in the direction of the arrow D in FIG. 6C, FIG. 5E is a cross-sectional view taken along line ee, and FIG.
(j) is a view showing still another pattern of the sealing projection, and (f) is a plan view of one cut end of the ring body,
The same figure (g) is a view taken in the direction g in the figure (f), the figure (h) is a plan view of the other cut end, and the figure (i) is a view taken in the direction I in the figure (h). , (J) is a sectional view taken along the line j-j.

【図６】図６は本発明の他の実施の形態に係るシールリ
ングを示す図である。FIG. 6 is a diagram showing a seal ring according to another embodiment of the present invention.

【図７】図７は本発明のさらに他の実施の形態に係るシ
ールリングを示す図である。FIG. 7 is a diagram showing a seal ring according to still another embodiment of the present invention.

【図８】図８は従来のシールリングの説明図である。FIG. 8 is an explanatory diagram of a conventional seal ring.

【符号の説明】[Explanation of symbols]

２ ハウジング ３ 軸 ４ 環状隙間 ５ リング本体 ５１ 側面（軸方向シール部側） ５２ 側面 ５３ 外周面 ５４ 内周面 ６ 装着溝 ６１ 内側壁（軸方向シール部側） ６２ 内側壁 ６３ 底壁 ７ 円弧状凸部 ７１ 径方向合わせ面 ７２ 軸方向合わせ面 ８ 円弧状凹部 ８１ 径方向合わせ面 ８２ 軸方向合わせ面 ９ 径方向突起 １０ 軸方向突起 １１ａ，ｂ 円弧状合わせ面 １２ａ，ｂ 傾斜合わせ面 １３，１４ シール用突起 2 housing 3 axes 4 annular gap 5 ring body 51 Side (Axial seal part side) 52 side 53 outer peripheral surface 54 Inner surface 6 mounting groove 61 Inner wall (axial seal part side) 62 inner wall 63 bottom wall 7 Circular convex 71 radial mating surface 72 Axial alignment surface 8 Arc-shaped recess 81 radial mating surface 82 Axial alignment surface 9 radial projection 10 Axial protrusion 11a, b Arc-shaped mating surfaces 12a, b Inclination matching surface 13,14 Seal protrusion

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】リング本体を周方向の一箇所にて切断し、
一方の切断端部に円周方向に部分的に突出する円弧状凸
部を設けると共に、他方の切断端部に前記円弧状凸部に
対応する円弧状凹部を設け、前記円弧状凸部と円弧状凹
部間に、軸方向および径方向への相対移動を規制しかつ
円周方向への相対移動を可能とする合わせ面を設け、前
記円弧状凸部と円弧状凹部間の円周方向の相対移動によ
って温度変化によるリング本体の周長変化を吸収するシ
ールリングにおいて、前記円弧状凸部の径方向の厚さを前記円弧状凹部の径方
向の深さより小さく、および／または、前記円弧状凸部
の軸方向の厚さを前記円弧状凹部の軸方向の深さより小
さくなるように設け、 前記円弧状凸部と円弧状凹部の合わせ面間に、該合わせ
面間のシール状態を維持しつつ軸方向および径方向に変
形可能で、かつ、前記円弧状凹部の径方向の深さと前記
円弧状凸部の径方向の厚さとの差より大きい、および／
または、前記円弧状凹部の軸方向の深さと前記円弧状凸
部の軸方向の厚さとの差より大きい高さを有するシール
用突起を設け、 該シール用突起によって円弧状凸部を円弧状凹部から径
方向および軸方向に突出させて段差を形成し、リング本
体に加わる径方向および軸方向の流体圧によって前記シ
ール用突起を変形させて段差を吸収可能としたことを特
徴とするシールリング。1. A ring body is cut at one location in the circumferential direction,
An arcuate convex portion that partially projects in the circumferential direction is provided at one cutting end portion, and an arcuate concave portion corresponding to the arcuate convex portion is provided at the other cutting end portion. A mating surface that restricts relative movement in the axial direction and the radial direction and allows relative movement in the circumferential direction is provided between the arcuate recesses, and the relative arcuate direction between the arcuate projections and the arcuate recesses is provided. In a seal ring that absorbs a change in circumferential length of a ring body due to a change in temperature due to movement, a radial thickness of the arc-shaped convex portion is defined as a radial direction of the arc-shaped concave portion.
Direction depth and / or the arcuate convex portion
Is smaller than the axial depth of the arcuate recess.
It is provided so as to be small , and can be deformed in the axial direction and the radial direction between the mating surfaces of the arcuate convex portion and the arcuate concave portion while maintaining the sealing state between the mating surfaces , and the diameter of the arcuate concave portion. Direction depth and
Greater than the difference between the radial thickness of the arcuate protrusion and /
Alternatively, the axial depth of the arcuate recess and the arcuate projection
A sealing projection having a height greater than the difference between the axial thickness of the ring portion and the sealing projection, the arc-shaped convex portion is projected from the circular-arc concave portion in the radial direction and the axial direction to form a step, and a ring is formed. A seal ring, wherein the sealing projection is deformed by a radial and axial fluid pressure applied to the main body to absorb a step. 【請求項２】円弧状凸部と円弧状凹部の合わせ面は、径
方向に接触する径方向合わせ面と、該径方向合わせ面と
隣接し軸方向に接触する軸方向合わせ面とから構成さ
れ、径方向合わせ面間にはシール用突起として径方向に
変形可能な径方向突起を、軸方向合わせ面間にはシール
用突起として軸方向に変形可能な軸方向突起を設けたこ
とを特徴とする請求項１に記載のシールリング。2. A mating surface of the arcuate convex portion and the arcuate recessed portion is composed of a radial mating surface that contacts in the radial direction and an axial mating surface that is adjacent to the radial mating surface and that contacts in the axial direction. A radial projection that can be deformed in the radial direction as a projection for sealing is provided between the radial mating surfaces, and an axial projection that can be deformed in the axial direction as a projection for sealing is provided between the axial mating surfaces. The seal ring according to claim 1.