JP2004190796A - Seal ring - Google Patents

Seal ring Download PDF

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Publication number
JP2004190796A
JP2004190796A JP2002360575A JP2002360575A JP2004190796A JP 2004190796 A JP2004190796 A JP 2004190796A JP 2002360575 A JP2002360575 A JP 2002360575A JP 2002360575 A JP2002360575 A JP 2002360575A JP 2004190796 A JP2004190796 A JP 2004190796A
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JP
Japan
Prior art keywords
surface portion
inclined surface
seal ring
abutment
surface part
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.)
Withdrawn
Application number
JP2002360575A
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Japanese (ja)
Inventor
Yoshiyuki Abe
良行 阿部
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
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Filing date
Publication date
Application filed by Nok Corp filed Critical Nok Corp
Priority to JP2002360575A priority Critical patent/JP2004190796A/en
Publication of JP2004190796A publication Critical patent/JP2004190796A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a seal ring easily manufacturable by cutting at a low cost while holding high sealability. <P>SOLUTION: The end face of an abutment end 2 comprises a first sloped surface part 2a tilted on a side face 4 side, a second sloped surface part 2b tilted on a side face 5 side in the same direction as that of the first sloped surface part 2a, and a third surface part 2c connecting the first sloped surface part 2a to the second sloped surface part 2b. Also, the end face of an abutment end 3 comprises a fourth sloped part 3a tilted on the side face 5 side, a fifth sloped surface part 3b tilted on the side face 4 side in the same direction as that of the fourth tilted surface part 3a, and a sixth surface part 3c connecting the fourth sloped surface part 3a to the fifth sloped surface part 3b. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、合口を有するシールリングに関するもので、例えば自動車の自動変速機等の油圧装置に用いられる。
【0002】
【従来の技術】
シールリングは装着性の問題等のために円周上の1箇所をカットして合口を有することが一般的である。
【0003】
このシールリングの合口形状は従来から種々提案されている。例えば、図3(a)の合口はシールリング100の径方向に平行にカットされたストレートカットである。また、図3(b)の合口はシールリング200の径方向に対して斜めにカットされたバイアスカットである。
【0004】
しかしながら、ストレートカットでは低温時に多量の漏れが発生する。また、バイアスカットではストレートカット対比で最大漏れ量は少ないが低温域・高温域で大きな漏れが発生する。
【0005】
ここで、バイアスカットでは、バイアスカット角度が小さい程合口に生じる隙間が小さく、漏れを抑えられることが知られている。しかし、バイアスカット角度が小さいとカット長さが長くなり、特に小径のシールリングの場合にバイアスカット角度を小さくすることに限界があった。
【0006】
即ち、図4に示すように、バイアスカット角度をθ、カット長をL、シールリング内径をφd、シールリング高さをHとすると、φd>Lの範囲でしかカットできなく、カット可能範囲としてはtanθ>(H/φd)を満たさなければならなかった。
【0007】
このため、特に高いシール性を要求される用途においては、ストレートカットやバイアスカットよりも漏れ量を少なくした合口形状が採用される。例えば、図3(c)のシールリング300の合口は周方向に重なり合う切断面を備えることで漏れ量を低減した特殊ステップカットがある。
【0008】
特殊ステップカットは、合口形状が複雑なため切削加工でカットすることが困難であり、PEEK(ポリエーテルエーテルケトン)等の熱可塑性樹脂を射出成形して金型で合口を形成する必要があり、流動数が少ない場合は型費用が発生してコスト高になってしまう。
【0009】
【発明が解決しようとする課題】
本発明は、上記従来技術に鑑みてなされたものであり、その目的とするところは、高いシール性を有しつつ切削加工により低コストで容易に製造可能なシールリングを提供することにある。
【0010】
【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、断面矩形で合口を有するシールリングであって、前記合口の一方の端面は、一方の側面側で一方の側面の一端縁から周上位置をずらして斜めに傾斜させて他端縁までを結ぶ第1傾斜面部と、他方の側面側で一端縁から周上位置をずらして前記第1傾斜面部と同じ方向に斜めに傾斜させて他方の側面の他端縁までを結ぶ第2傾斜面部と、前記第1傾斜面部と前記第2傾斜面部との間を結ぶ第3面部と、を備えると共に、前記合口の他方の端面は、他方の側面側で他方の側面の一端縁から周上位置をずらして斜めに傾斜させて他端縁までを結ぶ第4傾斜面部と、一方の側面側で一端縁から周上位置をずらして前記第4傾斜面部と同じ方向に斜めに傾斜させた一方の側面の他端縁までを結ぶ第5傾斜面部と、前記第4傾斜面部と前記第5傾斜面部との間を結ぶ第6面部と、を備えることを特徴とする。
【0011】
すなわち、合口の両方の端面は、いずれも、一方の側面から他方の側面に向かううちに2度折れ曲がって3つの面を形成しており、両側面側の面が同方向に径方向に対して斜めに傾斜する傾斜面部となり、その両傾斜面部に挟まれた部分にさらに両傾斜面部を結ぶ面部となっている。
【0012】
よって、具体的な合口の一方の端面は、第3面部を基準とすると、第1傾斜面部が一方の側面側で第3面部の周上位置から突出した突出部の端面となり、第2傾斜面部が他方の側面側で第3面部の周上位置から凹んだ凹部の端面となっている。なお、第1、第2傾斜面部の関係はこの逆で、第1傾斜面部が凹部端面となり、第2傾斜面部が突出部端面となってもよい。
【0013】
同様に、具体的な合口の他方の端面は、第6面部を基準とすると、第4傾斜面部が他方の側面側で第6面部の周上位置から突出した突出部の端面となり、第5傾斜面部が一方の側面側で第6面部の周上位置から凹んだ凹部の端面となっている。なお、第4、第5傾斜面部の関係はこの逆で、第4傾斜面部が凹部端面となり、第5傾斜面部が突出部端面となってもよい。
【0014】
そして、合口としては、第1、第2傾斜面部及び第3面部を備える一方の合口端面と、対称形状の第4、第5傾斜面部及び第6面部を備える他方の合口端面と、を組み合わせるものである。具体的には、合口においてシールリングの一方の側面から他方の側面へ順に、一方の端面の第1傾斜面部には他方の端面の第5傾斜面部が突き合わされ、一方の端面の第3面部には他方の端面の第6面部が突き合わされ、一方の端面の第2傾斜面部には他方の端面の第4傾斜面部が突き合わされる。
【0015】
この構成により、高温時には合口の両端面の第3、第6面部が突き当たり、隙間が発生しない。また、低温時には合口の第3、第6面部間に隙間が生じるが、突き合わされた第1、第5傾斜面部間及び第2、第4傾斜面部間では隙間を小さく抑える。このため、全温度領域で大きな漏れが発生せず高いシール性を有する。
【0016】
また、側面に対する各傾斜面部の角(バイアスカット角度)を小さくしても、バイアスカット対比でカット長を短くできるため、特に小径のシールリングにも本発明の合口端面形状を採用可能である。
【0017】
さらに、合口を形成するためには両側面間を2回折れ曲がった切断面で切断するだけであるので、切削加工で生産可能となり、高価な金型を作る必要がなく低コストで生産可能である。
【0018】
前記合口は、外周面側では略Z字状の切口形状を現すことが好適である。
【0019】
これにより、シールリングの合口の一方の端面が2つの第1、第2傾斜面部及び第3面部を備えると共に、合口の他方の端面が2つの第4、第5傾斜面部及び第6面部を備えることが外周側から見て一目で判別可能である。
【0020】
前記第1傾斜面部と前記一方の側面とがなす角及び前記第2傾斜面部と前記他方の側面とがなす角並びに前記第4傾斜面部と前記他方の側面とがなす角及び前記第5傾斜面部と前記一方の側面とがなす角は、10°以下であることが好適である。
【0021】
これにより、突き合わされた第1、第5傾斜面部間及び第2、第4傾斜面部間での隙間を小さくでき、低温時にもストレートカット及びバイアスカット対比で漏れを低減可能である。
【0022】
【発明の実施の形態】
以下に図面を参照して、この発明の好適な実施の形態を例示的に詳しく説明する。ただし、この実施の形態に記載されている構成部品の寸法、材質、形状、その相対配置などは、特に特定的な記載がない限りは、この発明の範囲をそれらのみに限定する趣旨のものではない。
【0023】
図1は実施の形態に係るシールリング1を示す展開図である。図2は図1に示すシールリング1のA部の部分拡大図である。
【0024】
シールリング1は、図1に示すように樹脂材料(例えばPTFE(ポリテトラフルオロエチレン)等)による円環状をしている。シールリング1は、例えば軸等に設けられた断面矩形の取付溝に装着され、ハウジングの軸孔の内周面と軸の外周面の間の環状隙間をシールする。
【0025】
シールリング1は、断面矩形で、図1のA部に示す合口を有する。A部を拡大した図2を用いて合口について説明する。
【0026】
シールリング1の合口は、図2(b)に示すように向かい合う合口端2の端面に、第1傾斜面部2aと、第2傾斜面部2bと、第3面部2cと、を設けると共に、合口端3の端面に、第4傾斜面部3aと、第5傾斜面部3bと、第6面部3cと、を設ける構成である。
【0027】
第1傾斜面部2aは、図2では上面の側面4側で側面4の端縁と断面中央部側端縁とのシールリング1周上位置をずらして斜めに傾斜する。すなわち、第1傾斜面部2aは、側面4からシールリング1の中心部へ向かう領域で周上位置をずらしていって斜めに傾斜した傾斜面部である。
【0028】
第2傾斜面部2bは、図2では下面の側面5側で断面中央部側端縁と側面5の端縁とのシールリング1周上位置をずらして第1傾斜面部2aと同じ方向に斜めに傾斜する。すなわち、第2傾斜面部2bは、側面5からシールリング1の中心部へ向かう領域で周上位置をずらしていって第1傾斜面部2aと同じ方向に斜めに傾斜した傾斜面部である。
【0029】
第3面部2cは、第1傾斜面部2aと第2傾斜面部2bとの間をシールリング1周上位置が等しいまま平面で結ぶ。すなわち、シールリング1の中央部で第1傾斜面部2aと第2傾斜面部2bのシールリング1の断面中央部側端縁同士の周上位置を等しくさせた平面で結ぶ面部である。
【0030】
合口端2の端面全体としては、側面4から側面5に向かううちに2度折れ曲がって3つの面を形成しており、両側面側の2面が同方向に側面4,5に対して斜めに傾斜する第1、第2傾斜面部2a,2bとなり、その両第1、第2傾斜面部2a,2bに挟まれた部分が径方向にそった第3面部2cとなっている。
【0031】
具体的な図示手前側の合口端2の端面外形は、第3面部2cを基準とすると、一方の第1傾斜面部2aが側面4側で第3面部2cの周上位置から突出した突出部の端面となり、第2傾斜面部2bが側面5側で第3面部2cの周上位置から凹んだ凹部の端面となっている。
【0032】
一方、第4傾斜面部3aは、図2では下面の側面5側で断面中央部側端縁と側面5の端縁とのシールリング1周上位置をずらして斜めに傾斜する。すなわち、第4傾斜面部3aは、側面5からシールリング1の中心部へ向かう領域で周上位置をずらしていって斜めに傾斜した傾斜面部である。
【0033】
第5傾斜面部3bは、図2では上面の側面4側で側面4の端縁と断面中央部側端縁とのシールリング1周上位置をずらして第4傾斜面部3aと同じ方向に斜めに傾斜する。すなわち、第5傾斜面部3bは、側面4からシールリング1の中心部へ向かう領域で周上位置をずらしていって第4傾斜面部3aと同じ方向に斜めに傾斜した傾斜面部である。
【0034】
第6面部3cは、第4傾斜面部3aと第5傾斜面部3bとの間をシールリング1周上位置が等しいまま平面で結ぶ。すなわち、シールリング1の中央部で第4傾斜面部3aと第5傾斜面部3bのシールリング1の断面中央部側端縁同士の周上位置を等しくさせた平面で結ぶ面部である。
【0035】
合口端3の端面全体としては、側面5から側面4に向かううちに2度折れ曲がって3つの面を形成しており、両側面側の2面が同方向に側面4,5に対して斜めに傾斜する第4、第5傾斜面部3a,3bとなり、その両第4、第5傾斜面部3a,3bに挟まれた部分が径方向にそった第6面部3cとなっている。
【0036】
具体的な図示奥側の合口端3の端面外形は、図示手前側の合口端2の端面と対称形状をしており、第6面部3cを基準とすると、第4傾斜面部3aが側面5側で第6面部3cの周上位置から突出した突出部の端面となり、第5傾斜面部3bが側面4側で第6面部3cの周上位置から凹んだ凹部の端面となっている。
【0037】
そして、合口端2と合口端3とが各々の対向する各面の端面を突き合わせて組み合わさる。
【0038】
具体的には、合口端2の第1傾斜面部2aには合口端3の第5傾斜面部3bが突き合わされ、合口端2の第3面部2cには合口端3の第6面部3cが突き合わされ、合口端2の第2傾斜面部2bには合口端3の第4傾斜面部3aが突き合わされることによって、組み合わさる。
【0039】
この合口端2,3が組み合わされた状態は、図1又は図2(a)に示すように外周面6側では略Z字状の切口形状を現すので、シールリング1の合口端2,3のそれぞれが第1、第4傾斜面部2a,3a、第2、第5傾斜面部2b,3b及び第3、第6面部2c,3cを備えることが外周面6側から見て一目で判別可能である。
【0040】
さらに、第1傾斜面部2aと側面4とがなす角(又は第4傾斜面部3aと側面5とがなす角)及び第2傾斜面部2bと側面5とがなす角(又は第5傾斜面部3bと側面4とがなす角)(すなわち、バイアスカット角度)は、10°以下であることがより好ましい。
【0041】
これによると、突き合わされた第1、第5傾斜面部2a,3b間及び第2、第4傾斜面部2b,3a間での隙間を小さくでき、低温時にもストレートカット及びバイアスカット対比で漏れを低減可能である。
【0042】
以上の構成により、高温時には合口の第3、第6面部2c,3c同士が突き当たり、隙間が発生しない。また、低温時には合口の第3、第6面部2c,3c間に隙間が生じるが、突き合わされた第1、第5傾斜面部2a,3b間及び第2、第4面部2b,3a間では隙間を小さく抑える。このため、全温度領域で大きな漏れが発生せず高いシール性を有する。
【0043】
また、側面4,5に対する第1、第2、第4、第5傾斜面部2a,2b,3a,3bの角(バイアスカット角度)を小さくしても、バイアスカット対比でカット長を短くできるため、特に小径のシールリング1にもこの合口端面形状を採用可能である。
【0044】
さらに、合口を形成するためには両側面4,5間を2回折れ曲がった切断面で切断するだけであるので、切削加工で生産可能となり、高価な金型を作る必要がなく低コストで生産可能である。
【0045】
【発明の効果】
以上説明したように本発明のシールリングでは、高いシール性を有しつつ切削加工により低コストで容易に製造可能となる。
【図面の簡単な説明】
【図1】実施の形態に係るシールリングを示す展開図である。
【図2】実施の形態に係るシールリングの図1A部の合口を拡大して示す斜視図である。
【図3】従来技術のシールリングの合口を示す斜視図である。
【図4】従来技術のシールリングを示す説明図である。
【符号の説明】
1 シールリング
2,3 合口端
2a 第1傾斜面部
2b 第2傾斜面部
2c 第3面部
3a 第4傾斜面部
3b 第5傾斜面部
3c 第6面部
4,5 側面
6 外周面
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seal ring having an abutment, and is used for a hydraulic device such as an automatic transmission of an automobile.
[0002]
[Prior art]
In general, the seal ring is cut at one position on the circumference to have an abutment due to a problem of mounting property or the like.
[0003]
Various shapes of the sealing ring have been proposed. For example, the abutment in FIG. 3A is a straight cut cut parallel to the radial direction of the seal ring 100. The joint in FIG. 3B is a bias cut obliquely cut in the radial direction of the seal ring 200.
[0004]
However, the straight cut causes a large amount of leakage at a low temperature. In the bias cut, the maximum leak amount is smaller than that of the straight cut, but a large leak occurs in a low temperature range and a high temperature range.
[0005]
Here, in the bias cut, it is known that the smaller the bias cut angle, the smaller the gap generated at the abutment, and the more the leakage can be suppressed. However, if the bias cut angle is small, the cut length becomes long, and there is a limit to reducing the bias cut angle, particularly in the case of a small diameter seal ring.
[0006]
That is, as shown in FIG. 4, when the bias cut angle is θ, the cut length is L, the seal ring inner diameter is φd, and the seal ring height is H, cutting can be performed only in the range of φd> L. Had to satisfy tan θ> (H / φd).
[0007]
For this reason, in applications requiring particularly high sealing properties, an abutment shape in which the amount of leakage is smaller than that of straight cut or bias cut is adopted. For example, there is a special step cut in which the abutment of the seal ring 300 in FIG. 3C is provided with cut surfaces that overlap in the circumferential direction to reduce the amount of leakage.
[0008]
Special step cutting is difficult to cut by cutting because the shape of the joint is complicated, and it is necessary to form a joint with a mold by injection molding a thermoplastic resin such as PEEK (polyetheretherketone). When the number of flow is small, a mold cost is generated and the cost is increased.
[0009]
[Problems to be solved by the invention]
The present invention has been made in view of the above prior art, and an object of the present invention is to provide a seal ring that has high sealing properties and can be easily manufactured at low cost by cutting.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, there is provided a seal ring having a rectangular cross section and an abutment, wherein one end face of the abutment is located on a peripheral side from one edge of one side on one side. A first inclined surface portion that is inclined to be inclined and connected to the other end edge, and the other side surface that is obliquely inclined in the same direction as the first inclined surface portion by displacing the circumferential position from the one end edge on the other side surface side A second inclined surface portion that connects to the other end edge of the first and second surfaces, and a third surface portion that connects between the first inclined surface portion and the second inclined surface portion. A fourth inclined surface portion which is inclined from the one end edge of the other side surface by shifting the peripheral position to the other end edge and connects to the other end edge; Fifth inclined surface connecting the other end of one side surface obliquely inclined in the same direction as When, characterized in that it comprises a sixth surface portion connecting between said fourth inclined surface portion and the fifth inclined surface portion.
[0011]
In other words, both end surfaces of the abutment are bent twice to form three surfaces while going from one side surface to the other side surface, and the surfaces on both side surfaces are radially in the same direction. The inclined surface portion is inclined obliquely, and a portion sandwiched between the two inclined surface portions further connects the both inclined surface portions.
[0012]
Therefore, one end surface of the specific abutment is, with reference to the third surface portion, the first inclined surface portion being the end surface of the protruding portion projecting from the peripheral position of the third surface portion on one side surface, and the second inclined surface portion Is an end face of a concave portion which is recessed from a position on the periphery of the third surface portion on the other side surface side. Note that the relationship between the first and second inclined surfaces is opposite to the above, and the first inclined surface may be the concave end surface, and the second inclined surface may be the protruding end surface.
[0013]
Similarly, the other end surface of the specific abutment is, with reference to the sixth surface portion, the fourth inclined surface portion being the end surface of the protruding portion projecting from the peripheral position of the sixth surface portion on the other side surface, and The surface portion is an end surface of a concave portion which is recessed from a position on the periphery of the sixth surface portion on one side surface side. Note that the relationship between the fourth and fifth inclined surface portions is opposite to the above, and the fourth inclined surface portion may be the end surface of the concave portion, and the fifth inclined surface portion may be the end surface of the protruding portion.
[0014]
And, as the abutment, a combination of one abutment end surface having the first, second inclined surface portion and the third surface portion and the other abutment end surface having the symmetrical fourth, fifth inclined surface portion and the sixth surface portion. It is. Specifically, at the joint, in order from one side surface of the seal ring to the other side surface, the fifth inclined surface portion of the other end surface is abutted against the first inclined surface portion of one end surface, and the third inclined surface portion of the one end surface. The sixth surface of the other end surface is abutted, and the second inclined surface of the one end surface is abutted with the fourth inclined surface portion of the other end surface.
[0015]
With this configuration, at the time of high temperature, the third and sixth surface portions on both end surfaces of the abutment abut, and no gap is generated. Further, at low temperatures, a gap is formed between the third and sixth surfaces of the abutment, but the gap is kept small between the butted first and fifth inclined surfaces and between the second and fourth inclined surfaces. For this reason, a large leak does not occur in the entire temperature range, and the sealing performance is high.
[0016]
Further, even if the angle of each inclined surface portion with respect to the side surface (bias cut angle) is reduced, the cut length can be shortened in comparison with the bias cut, so that the abutment end surface shape of the present invention can be particularly applied to a small diameter seal ring.
[0017]
Furthermore, in order to form an abutment, it is only necessary to cut the two side surfaces with a cut surface bent and bent twice, so that it is possible to produce by cutting, and it is possible to produce at low cost without having to make an expensive mold. .
[0018]
It is preferable that the joint has a substantially Z-shaped cut shape on the outer peripheral surface side.
[0019]
Thereby, one end face of the abutment of the seal ring includes two first, second inclined surface portions, and the third surface portion, and the other end surface of the abutment includes two fourth, fifth inclined surface portions, and the sixth surface portion. Can be determined at a glance from the outer peripheral side.
[0020]
The angle between the first inclined surface portion and the one side surface, the angle between the second inclined surface portion and the other side surface, the angle between the fourth inclined surface portion and the other side surface, and the fifth inclined surface portion It is preferable that the angle formed by the one side surface is 10 ° or less.
[0021]
Thereby, the gaps between the first and fifth inclined surface portions and between the second and fourth inclined surface portions that are brought into contact with each other can be reduced, and leakage can be reduced even at a low temperature in comparison with straight cut and bias cut.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Preferred embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto unless otherwise specified. Absent.
[0023]
FIG. 1 is a development view showing a seal ring 1 according to the embodiment. FIG. 2 is a partially enlarged view of a portion A of the seal ring 1 shown in FIG.
[0024]
As shown in FIG. 1, the seal ring 1 has an annular shape made of a resin material (for example, PTFE (polytetrafluoroethylene) or the like). The seal ring 1 is mounted in, for example, a mounting groove having a rectangular cross section provided on a shaft or the like, and seals an annular gap between the inner peripheral surface of the shaft hole of the housing and the outer peripheral surface of the shaft.
[0025]
The seal ring 1 has a rectangular cross section and has an abutment shown in a portion A of FIG. The abutment will be described with reference to FIG.
[0026]
As shown in FIG. 2B, the abutment of the seal ring 1 is provided with a first inclined surface portion 2a, a second inclined surface portion 2b, and a third surface portion 2c on the end surfaces of the facing abutting end 2, and the abutment end. In the configuration, a fourth inclined surface portion 3a, a fifth inclined surface portion 3b, and a sixth surface portion 3c are provided on an end surface of the third inclined surface portion 3.
[0027]
In FIG. 2, the first inclined surface portion 2 a is inclined obliquely by shifting the position of the edge of the side surface 4 and the edge of the central portion of the cross section on the circumference of the seal ring 1 on the side surface 4 side of the upper surface. That is, the first inclined surface portion 2a is an inclined surface portion that is inclined obliquely by shifting its circumferential position in a region from the side surface 4 toward the center of the seal ring 1.
[0028]
In FIG. 2, the second inclined surface portion 2 b is shifted obliquely in the same direction as the first inclined surface portion 2 a by shifting the position on the circumference of the seal ring between the edge of the cross-section center side and the edge of the side surface 5 on the side surface 5 of the lower surface. Incline. In other words, the second inclined surface portion 2b is an inclined surface portion whose position on the periphery is shifted in a region from the side surface 5 toward the center of the seal ring 1 and is inclined obliquely in the same direction as the first inclined surface portion 2a.
[0029]
The third surface portion 2c connects the first inclined surface portion 2a and the second inclined surface portion 2b with a flat surface while the positions on the circumference of the seal ring 1 are equal. That is, at the center of the seal ring 1, the first inclined surface portion 2a and the second inclined surface portion 2b are connected by a plane in which the peripheral positions of the edges of the seal ring 1 on the cross-section central portion side are equal.
[0030]
As a whole end face of the joint end 2, it bends twice from the side face 4 to the side face 5 to form three faces, and the two faces on both side faces are oblique to the side faces 4 and 5 in the same direction. The first and second inclined surfaces 2a and 2b are inclined, and a portion sandwiched between the first and second inclined surfaces 2a and 2b is a third surface 2c along the radial direction.
[0031]
A specific end face outer shape of the abutment end 2 on the near side in the drawing, with reference to the third surface portion 2c, is a projection portion in which one of the first inclined surface portions 2a protrudes from the circumferential position of the third surface portion 2c on the side surface 4 side. The second inclined surface portion 2b is an end surface of a concave portion which is recessed on the side surface 5 from a position on the periphery of the third surface portion 2c.
[0032]
On the other hand, in FIG. 2, the fourth inclined surface portion 3 a is inclined obliquely by shifting the position on the circumference of the seal ring between the edge on the side of the center of the cross section and the edge of the side surface 5 on the side surface 5 on the lower surface. That is, the fourth inclined surface portion 3a is an inclined surface portion that is inclined obliquely by shifting its circumferential position in a region from the side surface 5 toward the center of the seal ring 1.
[0033]
In FIG. 2, the fifth inclined surface portion 3b is shifted obliquely in the same direction as the fourth inclined surface portion 3a by shifting the position of the edge of the side surface 4 and the edge of the cross-section center portion on the circumference of the seal ring on the side surface 4 side of the upper surface. Incline. That is, the fifth inclined surface portion 3b is an inclined surface portion which is shifted in the circumferential position in a region from the side surface 4 toward the center of the seal ring 1 and is obliquely inclined in the same direction as the fourth inclined surface portion 3a.
[0034]
The sixth surface portion 3c connects the fourth inclined surface portion 3a and the fifth inclined surface portion 3b with a flat surface while the positions on the circumference of the seal ring 1 are equal. That is, at the center of the seal ring 1, the fourth inclined surface 3a and the fifth inclined surface 3b are connected to each other by a plane in which the peripheral positions of the edges of the seal ring 1 on the cross-section center side are equal.
[0035]
The entire end face of the abutment end 3 is bent twice to form three faces from the side face 5 toward the side face 4, and the two faces on both side faces are oblique to the side faces 4 and 5 in the same direction. Fourth and fifth inclined surfaces 3a and 3b are inclined, and a portion sandwiched between the fourth and fifth inclined surfaces 3a and 3b is a sixth surface 3c along the radial direction.
[0036]
The specific outer shape of the abutment end 3 on the far side of the drawing is symmetrical with the end surface of the abutment end 2 on the near side in the drawing, and with reference to the sixth surface 3c, the fourth inclined surface 3a is located on the side 5 side. Thus, the end face of the protrusion protruding from the position above the periphery of the sixth surface portion 3c is formed, and the fifth inclined surface portion 3b is the end surface of a concave portion that is recessed from the position above the periphery of the sixth surface portion 3c on the side surface 4.
[0037]
Then, the abutting end 2 and the abutting end 3 are combined by abutting the end faces of the respective opposing surfaces.
[0038]
Specifically, the fifth inclined surface portion 3b of the abutment end 3 abuts against the first inclined surface portion 2a of the abutting end 2, and the sixth surface portion 3c of the abutting end 3 abuts against the third surface portion 2c of the abutting end 2. The fourth inclined surface portion 3a of the abutting end 3 is brought into contact with the second inclined surface portion 2b of the abutting end 2 to be assembled.
[0039]
The state where the abutment ends 2 and 3 are combined shows a substantially Z-shaped cut shape on the outer peripheral surface 6 side as shown in FIG. 1 or FIG. Can be determined at a glance when viewed from the outer peripheral surface 6 side with the first and fourth inclined surface portions 2a and 3a, the second and fifth inclined surface portions 2b and 3b, and the third and sixth inclined surface portions 2c and 3c. is there.
[0040]
Further, the angle formed by the first inclined surface portion 2a and the side surface 4 (or the angle formed by the fourth inclined surface portion 3a and the side surface 5) and the angle formed by the second inclined surface portion 2b and the side surface 5 (or the angle formed by the fifth inclined surface portion 3b) The angle formed by the side surface 4 (that is, the bias cut angle) is more preferably 10 ° or less.
[0041]
According to this, the gaps between the butted first and fifth inclined surface portions 2a and 3b and between the second and fourth inclined surface portions 2b and 3a can be reduced, and even at a low temperature, leakage is reduced in comparison with straight cut and bias cut. It is possible.
[0042]
With the above configuration, at the time of high temperature, the third and sixth face portions 2c and 3c of the abutment abut against each other, and no gap is generated. At low temperatures, a gap is formed between the third and sixth surface portions 2c and 3c of the joint, but a gap is formed between the butted first and fifth inclined surface portions 2a and 3b and between the second and fourth surface portions 2b and 3a. Keep small. For this reason, a large leak does not occur in the entire temperature range, and the sealing performance is high.
[0043]
Further, even if the angles (bias cut angles) of the first, second, fourth, and fifth inclined surfaces 2a, 2b, 3a, and 3b with respect to the side surfaces 4 and 5 are reduced, the cut length can be shortened in comparison with the bias cut. In particular, it is possible to adopt this abutment end face shape also for the small-diameter seal ring 1.
[0044]
Furthermore, in order to form the abutment, it is only necessary to cut the two side surfaces 4 and 5 between the two cut surfaces by bending twice, so that it is possible to produce by cutting, and it is not necessary to make an expensive mold and to produce at low cost. It is possible.
[0045]
【The invention's effect】
As described above, the seal ring of the present invention can be easily manufactured at low cost by cutting while having high sealing properties.
[Brief description of the drawings]
FIG. 1 is a development view showing a seal ring according to an embodiment.
FIG. 2 is an enlarged perspective view showing an abutment of a portion of FIG. 1A of the seal ring according to the embodiment.
FIG. 3 is a perspective view showing a joint of a conventional seal ring.
FIG. 4 is an explanatory view showing a conventional seal ring.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seal ring 2 and 3 Abutment end 2a 1st slope 2b 2nd slope 3c 3rd slope 3b 5th slope 3c 6th slope 4 and 5 Side 6 Outer peripheral surface

Claims (3)

断面矩形で合口を有するシールリングであって、
前記合口の一方の端面は、一方の側面側で一方の側面の一端縁から周上位置をずらして斜めに傾斜させて他端縁までを結ぶ第1傾斜面部と、他方の側面側で一端縁から周上位置をずらして前記第1傾斜面部と同じ方向に斜めに傾斜させて他方の側面の他端縁までを結ぶ第2傾斜面部と、前記第1傾斜面部と前記第2傾斜面部との間を結ぶ第3面部と、を備えると共に、
前記合口の他方の端面は、他方の側面側で他方の側面の一端縁から周上位置をずらして斜めに傾斜させて他端縁までを結ぶ第4傾斜面部と、一方の側面側で一端縁から周上位置をずらして前記第4傾斜面部と同じ方向に斜めに傾斜させた一方の側面の他端縁までを結ぶ第5傾斜面部と、前記第4傾斜面部と前記第5傾斜面部との間を結ぶ第6面部と、を備えることを特徴とするシールリング。
A seal ring having an abutment with a rectangular cross section,
One end surface of the abutment has a first inclined surface portion that connects the one end surface of the one side surface to the other end edge by inclining obliquely by shifting a circumferential position from one end edge of the one side surface, and one end edge on the other side surface side. A second inclined surface portion which is inclined from the position on the circumference to be inclined in the same direction as the first inclined surface portion and connects to the other edge of the other side surface, and the first inclined surface portion and the second inclined surface portion. And a third surface portion connecting between them,
The other end surface of the abutment has a fourth inclined surface portion which is inclined on the other side surface by shifting the circumferential position from one end edge of the other side surface and inclined to the other end edge, and one end edge on one side surface side A fifth inclined surface portion connecting the other edge of one side surface inclined obliquely in the same direction as the fourth inclined surface portion by displacing a position on the periphery from the fourth inclined surface portion, and a fourth inclined surface portion and a fifth inclined surface portion. And a sixth surface portion connecting between them.
前記合口は、外周面側では略Z字状の切口形状を現すことを特徴とする請求項1に記載のシールリング。2. The seal ring according to claim 1, wherein the joint has a substantially Z-shaped cut shape on an outer peripheral surface side. 3. 前記第1傾斜面部と前記一方の側面とがなす角及び前記第2傾斜面部と前記他方の側面とがなす角並びに前記第4傾斜面部と前記他方の側面とがなす角及び前記第5傾斜面部と前記一方の側面とがなす角は、10°以下であることを特徴とする請求項1又は2に記載のシールリング。The angle between the first inclined surface portion and the one side surface, the angle between the second inclined surface portion and the other side surface, the angle between the fourth inclined surface portion and the other side surface, and the fifth inclined surface portion 3. The seal ring according to claim 1, wherein an angle between the first side and the one side surface is 10 ° or less. 4.
JP2002360575A 2002-12-12 2002-12-12 Seal ring Withdrawn JP2004190796A (en)

Priority Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102844596A (en) * 2011-04-20 2012-12-26 丰田自动车株式会社 Seal structure
JP2014119001A (en) * 2012-12-14 2014-06-30 Kayaba Ind Co Ltd Front fork
WO2017199871A1 (en) * 2016-05-19 2017-11-23 日本バルカー工業株式会社 Split seal ring

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102844596A (en) * 2011-04-20 2012-12-26 丰田自动车株式会社 Seal structure
CN102844596B (en) * 2011-04-20 2014-09-03 丰田自动车株式会社 Seal structure
JP2014119001A (en) * 2012-12-14 2014-06-30 Kayaba Ind Co Ltd Front fork
WO2017199871A1 (en) * 2016-05-19 2017-11-23 日本バルカー工業株式会社 Split seal ring
CN109154391A (en) * 2016-05-19 2019-01-04 日本华尔卡工业株式会社 Dissection type sealing ring
US10907736B2 (en) 2016-05-19 2021-02-02 Valqua, Ltd. Split seal ring

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