JPH1082466A - Seal ring - Google Patents
Seal ringInfo
- Publication number
- JPH1082466A JPH1082466A JP8261285A JP26128596A JPH1082466A JP H1082466 A JPH1082466 A JP H1082466A JP 8261285 A JP8261285 A JP 8261285A JP 26128596 A JP26128596 A JP 26128596A JP H1082466 A JPH1082466 A JP H1082466A
- Authority
- JP
- Japan
- Prior art keywords
- seal ring
- arc
- shaped convex
- convex portion
- housing
- 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
- Sealing Devices (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば、自動車，
建設機械等に使用される油圧機器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。TECHNICAL FIELD The present invention relates to, for example, automobiles,
The present invention relates to a seal ring used for a seal portion of a hydraulic device used for a construction machine or the like, and particularly to a structure of a cut portion of the seal ring.
【０００２】[0002]
【従来の技術】従来、自動車等に使用される油圧機器に
用いられるシールリングとしては、装着性の問題から図
３（ａ），（ｂ）のようなステップカットのシールリン
グが知られている。図３（ｂ）は図３（ａ）の矢印Ｂ方
向からみた図である。2. Description of the Related Art Conventionally, as a seal ring used for a hydraulic device used for an automobile or the like, a step-cut seal ring as shown in FIGS. . FIG. 3B is a diagram viewed from the direction of the arrow B in FIG.
【０００３】このシールリング１００本体は周方向の一
か所にて切断され、対向する切断端部間には、互いに嵌
合し合う２組の円弧状凸部と段差部が設けられている。[0003] The main body of the seal ring 100 is cut at one location in the circumferential direction, and two sets of arc-shaped convex portions and step portions that fit with each other are provided between opposing cut ends.
【０００４】第１円弧状凸部２は、周方向に直交する切
断面によって形成される端面２１及び軸方向に直交する
切断面によって形成される内側面２２，並びにシールリ
ング１００本体表面と同一面を形成する内周面２３，外
周面２４，外側面２５によって囲まれている。The first arc-shaped convex portion 2 has an end surface 21 formed by a cut surface orthogonal to the circumferential direction, an inner surface 22 formed by a cut surface orthogonal to the axial direction, and the same surface as the surface of the seal ring 100 main body. Are surrounded by an inner peripheral surface 23, an outer peripheral surface 24, and an outer surface 25.
【０００５】一方、第１段差部３は周方向に直交する切
断面によって形成される端面３１及び軸方向に直交する
切断面によって形成される側面３２とからなる。ここ
で、第１段差部３の側面３２は第２円弧状凸部４の内側
面でもある。On the other hand, the first step portion 3 has an end surface 31 formed by a cut surface orthogonal to the circumferential direction and a side surface 32 formed by a cut surface orthogonal to the axial direction. Here, the side surface 32 of the first step portion 3 is also the inner side surface of the second arc-shaped convex portion 4.
【０００６】第２円弧状凸部４及び第２段差部５は、第
１円弧状凸部２及び第２段差部３とそれぞれ同じ構造を
有する。[0006] The second arc-shaped convex portion 4 and the second step portion 5 have the same structure as the first arc-shaped convex portion 2 and the second step portion 3, respectively.
【０００７】シールリング１００は、図４に示すよう
に、ハウジング６の軸孔内周面６１と軸７間の環状隙間
８をシールするもので、シールリング１００本体は軸７
外周に前記環状隙間８に臨接して設けられた環状の装着
溝７１内に軸方向に移動自在に装着される。As shown in FIG. 4, the seal ring 100 seals the annular gap 8 between the shaft hole inner peripheral surface 61 of the housing 6 and the shaft 7.
It is mounted movably in the axial direction in an annular mounting groove 71 provided on the outer periphery in contact with the annular gap 8.
【０００８】密封状態では、装着溝７１の開口側に位置
するシールリング１００の外周面２０１が、装着溝７１
の奥側に位置する内周面２０２に作用する流体９の圧力
によって環状隙間８を横切ってハウジング６の軸孔内周
面６１に密封状態に圧接されて径方向シール部を構成し
ている。また、シールリング１００本体の軸方向一側面
２０３が軸方向他側面２０４に作用する流体圧によって
装着溝７１の一方の内側壁に密封状態に圧接されて軸方
向シール部を構成している。In the sealed state, the outer peripheral surface 201 of the seal ring 100 located on the opening side of the mounting groove 71 is
Is pressed against the inner peripheral surface 61 of the shaft hole of the housing 6 in a sealed state across the annular gap 8 by the pressure of the fluid 9 acting on the inner peripheral surface 202 located on the back side of the housing. Further, one axial side surface 203 of the seal ring 100 main body is pressed against one inner wall of the mounting groove 71 in a sealed state by fluid pressure acting on the other axial side surface 204 to form an axial seal portion.
【０００９】このとき、切断端部では、第１円弧状凸部
２の端面２１と第１段差部３の端面３１とが圧接し、第
１円弧状凸部２の内側面２３と第１段差部３の側面３２
とが圧接している。第２円弧状凸部４と第２段差部５と
の間でも同様である。At this time, at the cut end, the end surface 21 of the first arc-shaped convex portion 2 and the end surface 31 of the first stepped portion 3 are pressed against each other, and the inner surface 23 of the first arc-shaped convex portion 2 and the first stepped portion are pressed. Side surface 32 of part 3
And are in pressure contact. The same applies between the second arc-shaped convex portion 4 and the second step portion 5.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、このよ
うなステップカットのシールリングでは、切断端部を組
みわせて装着すると、ハウジング６の軸孔内周面６１と
シールリング１００本体の曲率の相違から、図５のよう
に、第１，第２円弧状凸部２，４が外径方向に突出し、
径方向シール部に隙間ができ、シール性が悪化する等の
問題があった。However, in such a step-cut seal ring, when the cut ends are combined and mounted, the seal ring 100 has a difference in curvature between the inner peripheral surface 61 of the shaft hole and the main body of the seal ring 100. As shown in FIG. 5, the first and second arc-shaped convex portions 2 and 4 protrude in the outer radial direction,
There has been a problem that a gap is formed in the radial seal portion, and the sealing performance is deteriorated.
【００１１】ハウジング６の軸孔内周面６１からの押圧
力によりシールリング１００の第１，第２円弧状凸部
２，４が内径側に押し込まれて径方向シール部の隙間が
解消する場合でも、図６に示すように第１，第２円弧状
凸部２，４のハウジング６の軸孔内周面６１との接触面
圧が円弧状凸部の先端部でピークを有するため、摩耗が
この部位に集中し、シールリングの寿命が短くなってい
た。When the first and second arc-shaped convex portions 2 and 4 of the seal ring 100 are pushed into the inner diameter side by the pressing force from the inner peripheral surface 61 of the shaft hole of the housing 6, the gap between the radial seal portions is eliminated. However, as shown in FIG. 6, the contact surface pressure of the first and second arc-shaped convex portions 2 and 4 with the inner peripheral surface 61 of the shaft hole of the housing 6 has a peak at the tip of the arc-shaped convex portion, so that wear is caused. However, the life of the seal ring was shortened.
【００１２】これに対し、図７のように、シールリング
１００の第１，第２円弧状凸部２，４の外周部分２４
１，４４１を破線のように削るのが一般的であった。On the other hand, as shown in FIG. 7, the outer peripheral portions 24 of the first and second arc-shaped convex portions 2 and 4 of the seal ring 100 are formed.
Generally, 1,441 was cut off as shown by a broken line.
【００１３】しかし、外周部分を削ると、削った部分の
大きさによってはシールリングの外周とハウジングとの
間に隙間が生じ、リーク量が増えてしまう可能性があっ
た。However, when the outer peripheral portion is cut, a gap may be formed between the outer periphery of the seal ring and the housing, depending on the size of the cut portion, and there is a possibility that the amount of leakage may increase.
【００１４】本発明は、上記従来技術の課題を解決する
ためになされたものであって、その目的とするところ
は、周方向の一か所で切断されたシールリングにおい
て、長寿命化とともにシール性の向上を図ることにあ
る。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a seal ring cut at one place in a circumferential direction, which has a long life and a seal. To improve the performance.
【００１５】[0015]
【課題を解決するための手段】上記の目的を達成するた
めに、第１の発明は、同心的に相対移動自在に組み付け
られる２部材の一方の部材に装着されるとともに他方の
部材に圧接し、該他方の部材との環状の隙間を密封する
シールリングであって、リング本体を周方向の一か所に
て切断し、一方の切断端部に円周方向に突出する円弧状
凸部を設けるとともに、他方の切断端部に前記円弧状凸
部と嵌合する段差部を設けたシールリングにおいて、前
記円弧状凸部の曲げ剛性を低下させて、前記他方の部材
からの押圧力に対して受圧側に曲げ変形することを特徴
とする。In order to achieve the above object, a first aspect of the present invention is to attach a member to one of two members which are concentrically and relatively movably mounted and press the member into contact with the other member. A seal ring for sealing an annular gap with the other member, wherein the ring main body is cut at one location in a circumferential direction, and one cut end has an arc-shaped convex portion projecting in a circumferential direction. In the seal ring provided with, at the other cut end, a step portion fitted with the arc-shaped convex portion, the bending rigidity of the arc-shaped convex portion is reduced, and the pressing force from the other member is reduced. And bends to the pressure receiving side.
【００１６】このようにすれば、シールリングの装着時
に、円弧状凸部と段差部との嵌合部と他方の部材との間
に生じる径方向の隙間が、他方の部材からの押圧力によ
る円弧状凸部の受圧側への変形により解消するので、こ
の隙間によるシール性の低下がない。According to this structure, when the seal ring is mounted, a radial gap generated between the fitting portion between the arc-shaped convex portion and the step portion and the other member is caused by the pressing force from the other member. Since the arc-shaped convex portion is resolved by the deformation on the pressure receiving side, there is no reduction in the sealing performance due to the gap.
【００１７】また、円弧状凸部の曲げ剛性を低下させる
ことにより、外径側に突出する円弧状凸部を他方の部材
からの押圧力により径方向の隙間を解消する場合に生じ
ていた接触面圧のピークがなくなるとともに接触面圧の
絶対値も小さくなるので、シールリングの摩耗が均一化
するとともに小さくなる。従って、シールリングの長寿
命化を図ることができる。Also, by reducing the bending stiffness of the arc-shaped projection, the contact caused when the arc-shaped projection protruding to the outer diameter side is eliminated by the pressing force from the other member to eliminate the radial gap. Since the peak of the surface pressure disappears and the absolute value of the contact surface pressure decreases, the wear of the seal ring becomes uniform and decreases. Therefore, the life of the seal ring can be extended.
【００１８】また、円弧状凸部の他方の部材との圧接部
分を削った場合のように、他方の部材との間に隙間が生
じてシール性が低下することもない。Further, unlike the case where the press-contact portion of the arc-shaped convex portion with the other member is cut, a gap is not formed between the convex portion and the other member, and the sealing performance is not deteriorated.
【００１９】曲げ剛性を低下させるためには、円弧状凸
部受圧側を切り欠いてもよいし、曲げ剛性の低い材質で
円弧状凸部を成形するようにしてもよい。また、円弧状
凸部に軸方向のスリットを入れてもよい。In order to reduce the bending rigidity, the arc-shaped convex portion pressure receiving side may be cut off, or the arc-shaped convex portion may be formed of a material having low bending rigidity. Further, an axial slit may be formed in the arc-shaped convex portion.
【００２０】ここで、シールリングは、外径側において
他方の部材に圧接し密封する場合に限らず、内径側にお
いて相手方部材に圧接し密封する場合であってもよい。Here, the seal ring is not limited to the case where it is pressed against the other member on the outer diameter side and is sealed, but may be the case where it is pressed and sealed against the other member on the inner diameter side.
【００２１】第２の発明は、第１の発明において、前記
他方の部材はハウジングであり、前記一方の部材は該ハ
ウジングの軸孔内に挿入される軸体であり、該軸体の外
周に設けられた溝に装着され、前記ハウジングの軸孔内
周面と圧接するシールリングであって、前記円弧状凸部
の内径側を切り欠き、径方向に薄肉に成形することによ
り前記円弧状凸部の曲げ剛性を低下させたことを特徴と
する。According to a second aspect, in the first aspect, the other member is a housing, and the one member is a shaft inserted into a shaft hole of the housing. A seal ring mounted in the provided groove and pressed against the inner peripheral surface of the shaft hole of the housing, wherein the inner diameter side of the arc-shaped convex portion is cut out, and the arc-shaped convex portion is formed by thinning in a radial direction. The bending rigidity of the portion is reduced.
【００２２】ここで、切り欠きは、成型後に切り欠いて
設ける場合に限らず、成型時に予め切り欠き部を設ける
ようにしてもよい。Here, the notch is not limited to the case where the notch is provided after molding, but the notch may be provided in advance at the time of molding.
【００２３】このようにすれば、成型あるいは切削加工
により、容易に円弧状凸部の曲げ剛性を低下させするこ
とができる。従って、円弧状凸部と段差部との嵌合部と
ハウジングの軸孔内周面との間で径方向の隙間が生じる
ことはなく、シール性が向上する。In this way, the bending rigidity of the arc-shaped convex portion can be easily reduced by molding or cutting. Therefore, no radial gap is formed between the fitting portion between the arc-shaped convex portion and the step portion and the inner peripheral surface of the shaft hole of the housing, and the sealing performance is improved.
【００２４】また、円弧状凸部の内径側を切り欠いて径
方向に薄肉に成形し、曲げ剛性を低下させることによ
り、外径側に突出する円弧状凸部をハウジングの軸孔内
周面からの押圧力により径方向の隙間を解消する場合に
生じていた接触面圧のピークがなくなるとともに接触面
圧の絶対値も小さくなるので、シールリングの摩耗が均
一化するとともに小さくなる。従って、シールリングの
長寿命化を図ることができる。Further, the arc-shaped convex portion is notched on the inner diameter side to form a thin wall in the radial direction to reduce bending rigidity, so that the arc-shaped convex portion projecting to the outer diameter side is formed on the inner peripheral surface of the shaft hole of the housing. Since the peak of the contact surface pressure, which has been generated when the radial gap is eliminated by the pressing force from the contact hole, disappears and the absolute value of the contact surface pressure decreases, the wear of the seal ring becomes uniform and small. Therefore, the life of the seal ring can be extended.
【００２５】また、円弧状凸部のハウジングの軸孔内周
面との圧接部分を削った場合のように、相手方部材との
間に隙間が生じてシール性が低下することもない。Further, unlike the case where the contact portion of the arc-shaped convex portion with the inner peripheral surface of the shaft hole of the housing is cut, a gap is not formed between the convex portion and the counterpart member, and the sealing performance is not deteriorated.
【００２６】[0026]
【発明の実施の形態】以下、本発明を図示の実施の形態
に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments.
【００２７】（第１の実施形態）図１は、本発明の第１
の実施形態に係るシールリング１を示す。(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
1 shows a seal ring 1 according to the embodiment.
【００２８】従来技術に係るシールリング１００と同様
の構成を有する部分については同一の符号を用いて説明
を省略する。Parts having the same configuration as the seal ring 100 according to the prior art are denoted by the same reference numerals and description thereof is omitted.
【００２９】本実施形態においては、ステップカットの
シールリング１の第１，第２円弧状凸部２５，４０の内
周側に、突出方向先端に向けて径方向の厚みが減少する
ような切り欠き２５，４５を設けた。In the present embodiment, the cutting is performed such that the radial thickness decreases toward the leading end in the protruding direction on the inner peripheral side of the first and second arc-shaped convex portions 25 and 40 of the step-cut seal ring 1. Notches 25 and 45 were provided.
【００３０】このように内周側に切り欠き２５，４５を
設けるようにすれば、第１，第２円弧状凸部２０，４０
の曲げ剛性を容易に低下させすることができる。従っ
て、シールリングの装着時には、第１，第２円弧状凸部
２０，４０と第１，第２段差部３，５との嵌合部とハウ
ジング６の軸孔内周面６１との間に生じる径方向の隙間
が、ハウジング６の軸孔内周面６１からの押圧力による
第１，第２円弧状凸部２０，４０の内径側への曲げ変形
により解消するので、シール性が向上する。If the notches 25 and 45 are provided on the inner peripheral side in this way, the first and second arc-shaped convex portions 20 and 40 can be provided.
Can be easily reduced in bending stiffness. Therefore, when the seal ring is mounted, the space between the fitting portion between the first and second arc-shaped convex portions 20 and 40 and the first and second step portions 3 and 5 and the inner peripheral surface 61 of the shaft hole of the housing 6 are provided. The radial gap generated is eliminated by the bending deformation of the first and second arc-shaped projections 20 and 40 toward the inner diameter side due to the pressing force from the inner peripheral surface 61 of the shaft hole of the housing 6, thereby improving the sealing performance. .
【００３１】また、円弧状凸部の外周側を削った場合の
ように、ハウジングとの間に隙間が生じてシール性が低
下することもない。Further, unlike the case where the outer peripheral side of the arc-shaped convex portion is shaved, a gap is not formed between the housing and the housing, and the sealing performance is not deteriorated.
【００３２】また、第１円弧状凸部２０，４０の外周面
が接触するハウジング６の軸孔内周面６１との間での接
触面圧のピーク（図６参照）がなくなり、ほぼ均一とな
るため、シールリング１の摩耗が集中する箇所がなくな
り、摩耗が均一化するとともに小さくなる。従って、シ
ールリング１の長寿命化を図ることができる。Further, the peak of the contact surface pressure (see FIG. 6) between the outer peripheral surfaces of the first arc-shaped convex portions 20 and 40 and the inner peripheral surface 61 of the shaft hole with which the housing 6 comes into contact disappears, and the substantially uniform pressure is maintained. Therefore, there is no place where the wear of the seal ring 1 is concentrated, and the wear becomes uniform and small. Therefore, the service life of the seal ring 1 can be extended.
【００３３】この切り欠き２５，４５は、シールリング
１本体の型成形時に型成形によって予め形成しておいて
もよいし、成形後に内径側を切削加工して形成してもよ
い。The notches 25 and 45 may be formed in advance by molding at the time of molding the seal ring 1 main body, or may be formed by cutting the inner diameter side after molding.
【００３４】ハウジング６の軸孔内周面６１の曲率とシ
ールリング１の曲率との関係により、第１，第２円弧状
凸部２０，４０の曲げ剛性をどの程度弱める必要がある
かが決まるので、図１の破線部分の切り欠き２５，４５
及び第１，第２円弧状凸部２０，４０の形状は、上記の
曲率の関係に基づいて設定する。The relationship between the curvature of the inner peripheral surface 61 of the shaft hole of the housing 6 and the curvature of the seal ring 1 determines how much the bending rigidity of the first and second arc-shaped projections 20 and 40 needs to be reduced. Therefore, cutouts 25 and 45 in broken line portions in FIG.
The shapes of the first and second arc-shaped convex portions 20 and 40 are set based on the above-described relationship between the curvatures.
【００３５】本実施形態では、切り欠きを、図１のよう
に三角柱状とし、円弧状凸部の形状を先端部に向けて径
方向に薄肉となるテーパー形状としているが、切り欠き
の形状及び円弧状凸部の形状はこれらに限られるもので
はない。In this embodiment, the notch has a triangular prism shape as shown in FIG. 1, and the shape of the arc-shaped convex portion has a tapered shape that becomes thinner in the radial direction toward the tip end. The shape of the arc-shaped convex portion is not limited to these.
【００３６】（第２の実施形態）図２は、第２の実施形
態に係るシールリングの切断端部周辺を示す。(Second Embodiment) FIG. 2 shows the vicinity of a cut end of a seal ring according to a second embodiment.
【００３７】本実施形態に係るシールリング１０は、特
殊ステップカットがなされており、一方の切断端部には
第１円弧状凸部１２が設けられ、他方の切断端部には第
１段差部１３が設けられており、第１円弧状凸部１２と
第１段差部１３が嵌合するようになっている。The seal ring 10 according to the present embodiment has a special step cut. A first arc-shaped convex portion 12 is provided at one cut end, and a first stepped portion is provided at the other cut end. 13 are provided, and the first arc-shaped convex portion 12 and the first step portion 13 are fitted.
【００３８】第１段差部１３は、軸方向の法線を有する
第１側面１３１，径方向の法線を有する第２側面１３
２，円周方向の法線を有する端面１３３とからなる。The first step portion 13 has a first side surface 131 having a normal in the axial direction, and a second side 13 having a normal in the radial direction.
2, an end face 133 having a normal in the circumferential direction.
【００３９】第１円弧状凸部１２は、軸方向の法線を有
する内側面１２１，円周方向に対して傾斜したテーパー
面をなす内周面１２２，円周方向の法線を有する端面１
２３、並びにシールリング本体表面と同一面を形成する
外周面１２４及び外側面１２５とからなる。The first arc-shaped convex portion 12 has an inner surface 121 having a normal in the axial direction, an inner surface 122 having a tapered surface inclined with respect to the circumferential direction, and an end surface 1 having a normal in the circumferential direction.
23, and an outer peripheral surface 124 and an outer surface 125 forming the same surface as the surface of the seal ring main body.
【００４０】シールリング１０の切断端部には、第１段
差部１３に軸方向に隣接して第２円弧状凸部１４が設け
られており、第１段差部１３の第１側面が第２円弧状凸
部１４の内側面と同一面を形成する。At the cut end of the seal ring 10, a second arc-shaped convex portion 14 is provided adjacent to the first step portion 13 in the axial direction, and the first side surface of the first step portion 13 is formed by the second side. The same surface as the inner surface of the arc-shaped convex portion 14 is formed.
【００４１】第１円弧状凸部１２の側には軸方向に隣接
して、第２円弧状凸部１４と嵌合する第２段差部１５が
形成されており、第１円弧状凸部１２及び第２段差部１
５の内径方向に隣接して第２端面１６が形成されてい
る。On the side of the first arc-shaped convex portion 12, a second step portion 15 that fits with the second arc-shaped convex portion 14 is formed adjacent to the first arc-shaped convex portion 12. And the second step portion 1
The second end face 16 is formed adjacent to the inner diameter direction of the second end face 5.
【００４２】また、第１段差部１３及び第２円弧状凸部
１４の内径方向に隣接して円周方向の法線を有する第３
端面１７が形成されている。The third step 13 has a normal in the circumferential direction adjacent to the first step portion 13 and the second arc-shaped convex portion 14 in the inner diameter direction.
An end face 17 is formed.
【００４３】このような特殊ステップカットは、型成
形，総切削加工又は部分的に型成形した後に切削加工す
ることにより形成する。Such a special step cut is formed by molding, total cutting or partial molding, followed by cutting.
【００４４】本実施形態に係るシールリング１０は、第
１の実施形態に係るシールリング１と同様にハウジング
６の軸孔６１内に同心的に相対移動可能に挿入される軸
７の外周に設けられた溝７１に装着され、流体圧により
形成される径方向及び軸方向のシール部により流体の密
封を行う。流体の圧力が作用している状態では、第１円
弧状凸部１２の端面１２３，内側面１２１，内周面１２
２と第１段差部１３の端面１３３，第１側面１３１，第
２側面１３２とがそれぞれ圧接する。このとき、もう一
組の第２円弧状凸部１４と第２段差部１５も同様に圧接
し、第２端面１６と第３端面１７も圧接している。The seal ring 10 according to the present embodiment is provided on the outer periphery of a shaft 7 which is concentrically inserted into a shaft hole 61 of the housing 6 so as to be relatively movable similarly to the seal ring 1 according to the first embodiment. The fluid is sealed by radially and axially sealed portions which are mounted in the groove 71 provided and formed by fluid pressure. In the state where the pressure of the fluid is acting, the end surface 123, the inner side surface 121, and the inner peripheral surface 12 of the first arc-shaped convex portion 12 are formed.
2 and the end surface 133, the first side surface 131, and the second side surface 132 of the first step portion 13 are pressed against each other. At this time, the other set of the second arc-shaped convex portion 14 and the second step portion 15 are similarly pressed against each other, and the second end surface 16 and the third end surface 17 are also pressed against each other.
【００４５】本実施形態では、第１円弧状凸部１２の内
径側を破線のように切り欠き、先端に向けて径方向に薄
肉となるテーパー状に形成している。In the present embodiment, the inner diameter side of the first arc-shaped convex portion 12 is cut out as shown by a broken line, and is formed in a tapered shape that becomes thinner in the radial direction toward the front end.
【００４６】このように第１円弧状凸部１２を形成すれ
ば、第１円弧状凸部１２の曲げ剛性が低下し、第１円弧
状凸部１２の端面１２３と第１段差部１３の端面１３３
とが圧接した状態で、第１円弧状凸部１２と第１段差部
１４との嵌合部とハウジング６の軸孔内周面６１との間
に生じる径方向の隙間が、ハウジング６の軸孔内周面６
１からの押圧力による第１円弧状凸部１２の内径側への
曲げ変形により解消するので、シール性が向上する。When the first arc-shaped protrusion 12 is formed as described above, the bending rigidity of the first arc-shaped protrusion 12 is reduced, and the end face 123 of the first arc-shaped protrusion 12 and the end face of the first stepped portion 13 are formed. 133
In a state where the housing 6 is in pressure contact, a radial gap generated between a fitting portion between the first arc-shaped convex portion 12 and the first step portion 14 and the inner peripheral surface 61 of the shaft hole of the housing 6 forms a shaft of the housing 6. Hole inner peripheral surface 6
Since the first arc-shaped convex portion 12 is eliminated by bending deformation toward the inner diameter side due to the pressing force from 1, the sealing performance is improved.
【００４７】また、第１実施形態に係るシールリング１
と同様に、第１円弧状凸部１２の外周面が接触するハウ
ジング６の軸孔内周面６１における接触面圧のピークが
なくなり、ほぼ均一となるため、シールリング１０の摩
耗が集中する箇所がなくなり、摩耗が均一化するととも
に小さくなる。従って、シールリング１０の長寿命化を
図ることができる。Further, the seal ring 1 according to the first embodiment
Similarly to the above, the peak of the contact surface pressure on the inner peripheral surface 61 of the axial hole of the housing 6 with which the outer peripheral surface of the first arc-shaped convex portion 12 comes into contact disappears and becomes almost uniform. And wear becomes uniform and smaller. Therefore, the life of the seal ring 10 can be extended.
【００４８】本実施形態における切り欠き１２６も、第
１実施形態に係るシールリング１と同様に、シールリン
グ本体の型成形時に型成形するか、シールリング本体の
成形後に切削加工により形成する。Similarly to the seal ring 1 according to the first embodiment, the notch 126 in this embodiment is formed by molding at the time of molding the seal ring main body, or is formed by cutting after forming the seal ring main body.
【００４９】ハウジング６の軸孔内周面６１の曲率とシ
ールリング１０の曲率との関係により、第１円弧状凸部
１２の曲げ剛性をどの程度弱める必要があるかが決まる
ので、図２の破線部分の切り欠き１２６及び第１円弧状
凸部１２の形状は、上記の曲率の関係に基づいて設定す
る。The relationship between the curvature of the inner peripheral surface 61 of the shaft hole of the housing 6 and the curvature of the seal ring 10 determines how much the bending rigidity of the first arc-shaped convex portion 12 needs to be reduced. The shapes of the notch 126 of the broken line portion and the first arc-shaped convex portion 12 are set based on the above-described relationship of the curvature.
【００５０】本実施形態では、切り欠き１２６を、図２
のように三角柱状とし、第１円弧状凸部１２の形状を先
端部に向けて径方向に薄肉となるテーパー形状としてい
るが、切り欠き１２６の形状及び第１円弧状凸部１２の
形状はこれらに限られるものではない。In this embodiment, the notch 126 is formed as shown in FIG.
And the shape of the first arc-shaped convex portion 12 is a tapered shape that becomes thinner in the radial direction toward the distal end portion, but the shape of the notch 126 and the shape of the first arc-shaped convex portion 12 are as follows. It is not limited to these.
【００５１】第１円弧状凸部１２について説明したが、
第２円弧状凸部１４も内径側に切り欠き１４６を設け先
端に向けて径方向に薄肉となるテーパー状に形成したの
で、第２円弧状凸部１４と第２段差部１５との嵌合部で
も同様にシール性が向上する。第１円弧状凸部１２に関
する上述の説明は第２円弧状凸部１４についてもあては
まるものである。Although the first arc-shaped convex portion 12 has been described,
The second arc-shaped convex portion 14 is also formed with a notch 146 on the inner diameter side and formed in a tapered shape that becomes thinner in the radial direction toward the tip, so that the second arc-shaped convex portion 14 and the second step portion 15 are fitted. The sealing performance is similarly improved in the part. The above description regarding the first arc-shaped protrusion 12 applies to the second arc-shaped protrusion 14.
【００５２】[0052]
【発明の効果】以上説明したように、第１の発明によれ
ば、円弧状凸部の曲げ剛性が低下しており、他方の部材
からの押圧力に対して受圧側に曲げ変形するようになっ
ているため、シールリングの装着時に、円弧状凸部と段
差部との嵌合部と他方の部材との間に生じる径方向の隙
間が、他方の部材からの押圧力による円弧状凸部の受圧
側への変形によって解消し、シール性が向上する。As described above, according to the first aspect, the bending stiffness of the arc-shaped convex portion is reduced, so that the arc-shaped convex portion is bent and deformed toward the pressure receiving side in response to the pressing force from the other member. Therefore, when the seal ring is mounted, a radial gap generated between the fitting portion between the arc-shaped convex portion and the step portion and the other member is formed by the arc-shaped convex portion due to the pressing force from the other member. By the deformation of the pressure receiving side, and the sealing performance is improved.
【００５３】また、円弧状凸部の相手方部材との圧接部
分を削った場合のように、他方の部材との間に隙間が生
じてシール性が低下することもない。Further, unlike the case where the contact portion of the arc-shaped convex portion with the counterpart member is shaved, a gap is not formed between the convex portion and the other member, and the sealing performance is not deteriorated.
【００５４】第２の発明によれば、成型あるいは切削加
工により、円弧状凸部の、ハウジングの軸孔内周面との
圧接部の内径側を切り欠き、径方向に薄肉に成形するこ
とによって、容易に曲げ剛性を低下させて、シール性を
向上させることができる。According to the second aspect of the present invention, the arc-shaped convex portion is cut off on the inner diameter side of the pressure contact portion with the inner peripheral surface of the shaft hole of the housing by molding or cutting to form a thin wall in the radial direction. In addition, the bending rigidity can be easily reduced, and the sealing performance can be improved.
【図１】 本発明の第１の実施形態に係るシールリング
の切断端部の概略を示す斜視図である。FIG. 1 is a perspective view schematically showing a cut end of a seal ring according to a first embodiment of the present invention.
【図２】 図２（ａ）は本発明の第２の実施形態に係る
シールリングの切断端部の概略を示す斜視図である。図
２（ｂ）は図２（ａ）の矢印Ａ方向からみた斜視図であ
る。FIG. 2A is a perspective view schematically showing a cut end of a seal ring according to a second embodiment of the present invention. FIG. 2B is a perspective view seen from the direction of arrow A in FIG.
【図３】 図３（ａ）は従来のステップカット形状のシ
ールリングの切断端部の概略を示す斜視図である。図３
（ｂ）は図３（ａ）の矢印Ｂ方向からみた斜視図であ
る。FIG. 3A is a perspective view schematically showing a cut end of a conventional seal ring having a step cut shape. FIG.
FIG. 3B is a perspective view seen from the direction of arrow B in FIG.
【図４】 従来のシールリングのシール部の概略構造を
示す断面図である。FIG. 4 is a cross-sectional view illustrating a schematic structure of a seal portion of a conventional seal ring.
【図５】 従来のシールリングを装着した場合の切断端
部の嵌合状態を示す図である。FIG. 5 is a view showing a fitted state of a cut end when a conventional seal ring is mounted.
【図６】 従来のシールリングの円弧状凸部先端近傍の
接触面圧を示すグラフである。FIG. 6 is a graph showing a contact surface pressure near a tip of an arc-shaped convex portion of a conventional seal ring.
【図７】 従来のステップカット形状のシールリングに
対策を施した場合の切断端部の概略を示す図である。FIG. 7 is a view schematically showing a cut end when a countermeasure is applied to a conventional seal ring having a step cut shape.
１，１０ シールリング １２，２０ 第１円弧状凸部 ３，１３ 第１段差部 １４，４０ 第２円弧状凸部 ５，１５ 第２段差部 ２５，４５，１２６，１４６ 切り欠き ６ ハウジング ６１ 軸孔内周面 ７ 軸 ７１ 溝 ８ 環状隙間 1,10 Seal ring 12,20 First arc-shaped convex part 3,13 First stepped part 14,40 Second arc-shaped convex part 5,15 Second stepped part 25,45,126,146 Notch 6 Housing 61 Shaft Hole inner peripheral surface 7 Shaft 71 Groove 8 Annular gap
Claims (2)
２部材の一方の部材に装着されるとともに他方の部材に
圧接し、該他方の部材との環状の隙間を密封するシール
リングであって、 リング本体を周方向の一か所にて切断し、一方の切断端
部に円周方向に突出する円弧状凸部を設けるとともに、
他方の切断端部に前記円弧状凸部と嵌合する段差部を設
けたシールリングにおいて、 前記円弧状凸部の曲げ剛性を低下させて、前記他方の部
材からの押圧力に対して受圧側に曲げ変形することを特
徴とするシールリング。1. A seal ring mounted on one of two members concentrically and relatively movably assembled and pressed against the other member to seal an annular gap with the other member. Cut the ring body at one location in the circumferential direction, and provide an arc-shaped convex portion protruding in the circumferential direction at one cut end,
In a seal ring provided with a stepped portion at the other cut end portion to be fitted with the arc-shaped convex portion, the bending rigidity of the arc-shaped convex portion is reduced, and a pressure-receiving side with respect to a pressing force from the other member. A seal ring characterized by being bent and deformed.
体であり、 該軸体の外周に設けられた溝に装着され、前記ハウジン
グの軸孔内周面と圧接するシールリングであって、 前記円弧状凸部の内径側を切り欠き、径方向に薄肉に成
形することにより前記円弧状凸部の曲げ剛性を低下させ
たことを特徴とする請求項１記載のシールリング。2. The housing according to claim 1, wherein the other member is a housing, the one member is a shaft inserted into a shaft hole of the housing, and the housing is mounted in a groove provided on an outer periphery of the shaft. A seal ring that presses against the inner peripheral surface of the shaft hole, wherein an inner diameter side of the arc-shaped protrusion is cut out, and the bending rigidity of the arc-shaped protrusion is reduced by forming the arc-shaped protrusion into a thin wall in a radial direction. The seal ring according to claim 1, wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26128596A JP3533847B2 (en) | 1996-09-09 | 1996-09-09 | Seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26128596A JP3533847B2 (en) | 1996-09-09 | 1996-09-09 | Seal ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1082466A true JPH1082466A (en) | 1998-03-31 |
| JP3533847B2 JP3533847B2 (en) | 2004-05-31 |
Family
ID=17359693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26128596A Expired - Fee Related JP3533847B2 (en) | 1996-09-09 | 1996-09-09 | Seal ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3533847B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002372154A (en) * | 2001-06-13 | 2002-12-26 | Nok Corp | Seal ring |
| WO2008093849A1 (en) | 2007-02-01 | 2008-08-07 | Nok Corporation | Seal ring |
-
1996
- 1996-09-09 JP JP26128596A patent/JP3533847B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002372154A (en) * | 2001-06-13 | 2002-12-26 | Nok Corp | Seal ring |
| WO2008093849A1 (en) | 2007-02-01 | 2008-08-07 | Nok Corporation | Seal ring |
| JP2008190570A (en) * | 2007-02-01 | 2008-08-21 | Nok Corp | Seal ring |
| US8720901B2 (en) | 2007-02-01 | 2014-05-13 | Nok Corporation | Seal ring |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3533847B2 (en) | 2004-05-31 |
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