JPH08312778A - Oil ring - Google Patents
Oil ringInfo
- Publication number
- JPH08312778A JPH08312778A JP11675395A JP11675395A JPH08312778A JP H08312778 A JPH08312778 A JP H08312778A JP 11675395 A JP11675395 A JP 11675395A JP 11675395 A JP11675395 A JP 11675395A JP H08312778 A JPH08312778 A JP H08312778A
- Authority
- JP
- Japan
- Prior art keywords
- rail
- cylinder
- oil ring
- wall
- oil
- 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- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging
- F16J9/061—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging using metallic coiled or blade springs
- F16J9/062—Coiled spring along the entire circumference
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、自動車のエンジンなど
のピストンに用いられるオイルリングに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil ring used for pistons of automobile engines and the like.
【０００２】[0002]
【従来の技術】自動車のエンジンなどのピストンに用い
られるオイルリングには、各種のタイプのものがある。
例えば、実開平２−４１７６３号公報には、その断面の
一部を表す図３に示すように、環状をなす上レール２１
と下レール２２とを同軸をなすように嵌合し、内周面に
形成された溝２３にコイルエキスパンダ２４を挿入した
３ピース型のオイルリング２０が開示されている。2. Description of the Related Art There are various types of oil rings used in pistons of automobile engines and the like.
For example, in Japanese Utility Model Laid-Open No. 2-41763, as shown in FIG. 3 showing a part of the cross section, an upper rail 21 having an annular shape.
There is disclosed a three-piece type oil ring 20 in which a lower rail 22 and a lower rail 22 are coaxially fitted and a coil expander 24 is inserted into a groove 23 formed in an inner peripheral surface.
【０００３】このようなオイルリング２０では、コイル
エキスパンダ２４が上レール２１及び下レール２２を径
方向外側へまんべんなく押圧するので、上レール２１の
当接部２１ａと下レール２２の当接部２２ａとがシリン
ダの内壁に密着し、シリンダの内壁に着いた余分なオイ
ルをかき落とすことができる。In such an oil ring 20, since the coil expander 24 uniformly presses the upper rail 21 and the lower rail 22 outward in the radial direction, the abutting portion 21a of the upper rail 21 and the abutting portion 22a of the lower rail 22. And are in close contact with the inner wall of the cylinder, and the excess oil that has adhered to the inner wall of the cylinder can be scraped off.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前述し
たようなオイルリング２０では、シリンダの内壁にわず
かながらも凹凸が生じてしまった場合、例えば、図４
（ａ）に示すように、下レール２２の当接部２２ａがシ
リンダ１２の内壁の凹部１２ａの開口部分に位置して
も、上レール２１の当接部２１ａが上記凹部１２ａより
もピストン１１側寄りの平坦部１２ｃに当接しているた
め、下レール２２の当接部２２ａがシリンダ１２の凹部
１２ａの内部のオイルをかき落とすことはできず、ま
た、図４（ｂ）に示すように、上レール２１の当接部２
１ａがシリンダ１２の上記凹部１２ａの開口部分に位置
しても、下レール２１の当接部２１ａが上述と同様に平
坦部１２ｃに当接しているため、上レール２１の当接部
２１ａも上記凹部１２ａの内部のオイルをかき落とすこ
とはできない。このため、オイルがシリンダ１２の内壁
に残留してしまい、燃焼室へ入り込んでしまう恐れがあ
った。However, in the oil ring 20 as described above, when the inner wall of the cylinder is slightly uneven, for example, as shown in FIG.
As shown in (a), even if the contact portion 22a of the lower rail 22 is located at the opening of the recess 12a in the inner wall of the cylinder 12, the contact portion 21a of the upper rail 21 is closer to the piston 11 than the recess 12a. Since the contact portion 22a of the lower rail 22 cannot scrape off the oil inside the recessed portion 12a of the cylinder 12 because it is in contact with the flat portion 12c near the side, as shown in FIG. Contact part 2 of upper rail 21
Even when 1a is located at the opening of the recess 12a of the cylinder 12, the contact portion 21a of the lower rail 21 is in contact with the flat portion 12c in the same manner as described above, so the contact portion 21a of the upper rail 21 is also as described above. The oil inside the recess 12a cannot be scraped off. Therefore, the oil may remain on the inner wall of the cylinder 12 and enter the combustion chamber.
【０００５】[0005]
【課題を解決するための手段】前述した課題を解決する
ための、本発明によるオイルリングは、環状をなすと共
にその軸心に沿う方向の断面形状が外周側へ窄まる略Ｖ
字型をなし、その外周がシリンダの内壁に当接するレー
ルと、前記レールの内部に挿入され、当該レールを径方
向外側へ付勢するコイルエキスパンダとを備えてなるこ
とを特徴とする。In order to solve the above-mentioned problems, an oil ring according to the present invention has an annular shape and its cross-sectional shape in a direction along the axis thereof is substantially V narrowed to the outer peripheral side.
It is characterized by comprising a rail having a character shape, the outer periphery of which comes into contact with the inner wall of the cylinder, and a coil expander which is inserted inside the rail and biases the rail radially outward.
【０００６】本発明に係るオイルリングは、前記レール
が内周側の軸心方向の長さを大きくできるように外周近
傍を摺動可能に係合させた上レールと下レールとからな
ることを特徴とする。The oil ring according to the present invention comprises an upper rail and a lower rail slidably engaged in the vicinity of the outer circumference so that the rail can increase the axial length on the inner circumference side. Characterize.
【０００７】[0007]
【作用】前述したように構成された本発明のオイルリン
グによれば、コイルエキスパンダがレールを径方向外側
へ付勢することにより、レールの外周がシリンダの内壁
に押圧される。この時、シリンダの内壁に凹凸があって
も、レールは、その軸心に沿う方向の断面形状が外周側
へ窄まる略Ｖ字型をなしているので、その外周がシリン
ダの内壁の凹凸に沿って当接するようになる。According to the oil ring of the present invention configured as described above, the outer circumference of the rail is pressed against the inner wall of the cylinder by the coil expander urging the rail radially outward. At this time, even if there are irregularities on the inner wall of the cylinder, the rail has a substantially V-shaped cross section in the direction along the axis of the rail, so that the outer periphery is irregular on the inner wall of the cylinder. To come into contact with each other.
【０００８】ここで、上記レールが前述したような上レ
ールと下レールとからなるものであれば、レールの径方
向外側へのコイルエキスパンダの付勢に伴うシリンダか
らの反作用により、レールは、その外周近傍が摺動し、
内周側の軸心方向の長さが大きくなるので、その内周側
がピストンの溝の上面及び下面に押圧するようになる。Here, if the rail is composed of the upper rail and the lower rail as described above, the rail is moved by the reaction from the cylinder due to the biasing of the coil expander to the radial outside of the rail. The vicinity of the outer periphery slides,
Since the length of the inner peripheral side in the axial direction becomes large, the inner peripheral side comes to press against the upper surface and the lower surface of the groove of the piston.
【０００９】[0009]
【実施例】本発明によるオイルリングを自動車のエンジ
ンのピストンに用いた場合の一実施例を図１，２を用い
て説明する。なお、図１は、その構造を表す一部抽出断
面図、図２は、その作用を表す一部抽出断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which an oil ring according to the present invention is used for a piston of an automobile engine will be described with reference to FIGS. Note that FIG. 1 is a partially-extracted sectional view showing the structure, and FIG. 2 is a partially-extracted sectional view showing the action thereof.
【００１０】図１に示すように、ピストン１１の溝１１
ａに差し込まれているレール１０は、環状をなすと共
に、その軸心に沿う方向の断面形状が外周側へ窄まる略
Ｖ字型をなしている。このレール１０は、その内周側の
軸心方向の長さを大きくできるように外周近傍が摺動可
能に係合する上レール１と下レール２とからなってい
る。As shown in FIG. 1, the groove 11 of the piston 11
The rail 10 inserted in a has an annular shape, and the cross-sectional shape in the direction along the axis of the rail 10 is substantially V-shaped, narrowing toward the outer peripheral side. The rail 10 is composed of an upper rail 1 and a lower rail 2 which are slidably engaged in the vicinity of the outer circumference so that the length of the inner circumference of the rail 10 in the axial direction can be increased.
【００１１】つまり、この下レール２は、その内周側に
ピストン１１の溝１１ａの下面と当接する取付部２ａが
形成され、当該取付部２ａの外周側に上方へ向けて傾斜
するように延びる傾斜部２ｂが形成されている一方、上
レール１は、その内周側にピストン１１の溝１１ａの上
面と当接する取付部１ａが形成され、当該取付部１ａの
外周側に下方へ向けて傾斜するように延びる傾斜部１ｂ
が形成され、当該傾斜部１ｂの外周側にシリンダ１２の
内壁と当接する当接部１ｃが形成され、当該当接部１ｃ
の下端に前記下レール２の傾斜部２ｂの外周側を支承す
る支持部１ｄが形成されているのである。That is, the lower rail 2 is formed with a mounting portion 2a on the inner peripheral side thereof that abuts the lower surface of the groove 11a of the piston 11, and extends on the outer peripheral side of the mounting portion 2a so as to incline upward. While the inclined portion 2b is formed, the upper rail 1 is provided with a mounting portion 1a that abuts the upper surface of the groove 11a of the piston 11 on the inner peripheral side thereof, and is inclined downward on the outer peripheral side of the mounting portion 1a. Inclined portion 1b extending so as to
Is formed, and an abutting portion 1c that abuts the inner wall of the cylinder 12 is formed on the outer peripheral side of the inclined portion 1b.
A support portion 1d for supporting the outer peripheral side of the inclined portion 2b of the lower rail 2 is formed at the lower end of the.
【００１２】図１に示すように、レール１０の内部に
は、上レール１及び下レール２の取付部１ａ、２ａ及び
傾斜部１ｂ、２ｂに当接し、当該レール１０を径方向外
側へ付勢する環状をなすコイルエキスパンダ３が挿入さ
れている。よって、コイルエキスパンダ３が上レール１
及び下レール２の傾斜部１ｂ、２ｂを径方向へ付勢する
ことにより、上レール１の当接部１ｃは、シリンダ１２
の内壁へ押圧されるので、シリンダ１２の内壁に着いた
余分なオイルをピストン１１の上下動に伴って確実にか
き落とすことができる。As shown in FIG. 1, inside the rail 10, the mounting portions 1a, 2a and the inclined portions 1b, 2b of the upper rail 1 and the lower rail 2 are abutted, and the rail 10 is urged radially outward. An annular coil expander 3 is inserted. Therefore, the coil expander 3 is the upper rail 1
By urging the inclined portions 1b and 2b of the lower rail 2 in the radial direction, the abutting portion 1c of the upper rail 1 is moved to the cylinder 12
Since the oil is pressed against the inner wall of the cylinder 12, the excess oil on the inner wall of the cylinder 12 can be reliably scraped off as the piston 11 moves up and down.
【００１３】このようなオイルリングでは、レール１０
が前述したような略Ｖ字型をなしているので、シリンダ
１２の内壁にわずかながらも凹凸が生じてしまった場合
でも、図２に示すように、上レール１の当接部１ｃがシ
リンダ１２の凹部１２ａの内部に入り込んで、当該内部
のオイルをかき落とし、ピストン１１の排油穴１１ｂか
ら排出することができる。従って、オイルをシリンダ１
２の内壁に残留させることがないので、オイルが燃焼室
へ入り込むことはない。In such an oil ring, the rail 10
Has a substantially V-shape as described above, even if the inner wall of the cylinder 12 is slightly uneven, as shown in FIG. The oil inside the recess 12a can be scraped off and drained from the oil drain hole 11b of the piston 11. Therefore, add oil to the cylinder 1
Since the oil does not remain on the inner wall of No. 2, oil does not enter the combustion chamber.
【００１４】一方、コイルエキスパンダ３が上レール１
及び下レール２の傾斜部１ｂ、２ｂを径方向外側へ付勢
することにより、上レール１の当接部１ｃがシリンダ１
２の内壁へ押圧され、この押圧に伴って、上記当接部１
ｃがシリンダ１２から反作用を受けるので、上レール１
は、その傾斜部１ｂがピストン１１の溝１１ａの上面へ
向けて押し返され、下レール２は、その傾斜部２ｂがピ
ストン１１の溝１１ａの下面へ向けて押し返される。こ
のため、上レール１及び下レール２の取付部１ａ、１ｂ
は、その間隔が拡大するよう、即ち、ピストン１１の溝
１１ａの上下面にそれぞれ押圧されるようになるので、
レール１０は、ピストン１１の溝１１ａに確実に取り付
けられる。On the other hand, the coil expander 3 has the upper rail 1
By urging the inclined portions 1b and 2b of the lower rail 2 outward in the radial direction, the abutting portion 1c of the upper rail 1 is moved to the cylinder 1.
The contact portion 1 is pressed against the inner wall of
Since c receives a reaction from the cylinder 12, the upper rail 1
The inclined portion 1b is pushed back toward the upper surface of the groove 11a of the piston 11, and the lower rail 2 has the inclined portion 2b pushed back toward the lower surface of the groove 11a of the piston 11. Therefore, the mounting portions 1a, 1b of the upper rail 1 and the lower rail 2 are
, The distance between them will increase, that is, the upper and lower surfaces of the groove 11a of the piston 11 will be respectively pressed.
The rail 10 is securely attached to the groove 11a of the piston 11.
【００１５】なお、前述した実施例では、上レール１の
傾斜部１ｂに当接部１ｃ及び支持部１ｄを設けたが、下
レールの傾斜部に当接部及び支持部を設けて、当該支持
部で上レールの傾斜部を押さえるようにしてもよい。In the above-described embodiment, the contact portion 1c and the support portion 1d are provided on the inclined portion 1b of the upper rail 1, but the contact portion and the support portion are provided on the inclined portion of the lower rail to support the support. You may make it hold down the inclined part of an upper rail with a part.
【００１６】[0016]
【発明の効果】前述したように、本発明によるオイルリ
ングでは、レールの軸心方向の断面形状が外周側へ窄ま
る略Ｖ字型をなしているので、シリンダの内壁に凹凸が
あっても、レールの外周がシリンダの内壁の凹凸に沿っ
て当接するようになる。このため、シリンダの内壁に着
いた余分なオイルを全てかき落とすことができるので、
燃焼室へのオイルの侵入を確実に防止することができ
る。As described above, in the oil ring according to the present invention, the cross-sectional shape of the rail in the axial direction is substantially V-shaped so as to narrow toward the outer peripheral side, so that even if the inner wall of the cylinder is uneven. The outer circumference of the rail comes into contact with the unevenness of the inner wall of the cylinder. Therefore, it is possible to scrape off any excess oil that has reached the inner wall of the cylinder.
It is possible to reliably prevent oil from entering the combustion chamber.
【００１７】また、レールが前述したような上レールと
下レールとからなるものであれば、コイルエキスパンダ
の付勢に伴うシリンダからの反作用により、レールの外
周近傍が摺動して、レールの内周側の軸心方向の長さが
大きくなるので、レールは、その内周側がピストンの溝
の上面及び下面に押圧するようになり、ピストンの溝に
確実に取り付けられる。If the rail is composed of the upper rail and the lower rail as described above, the reaction from the cylinder due to the urging of the coil expander causes the rail to slide in the vicinity of the outer periphery of the rail. Since the length of the inner peripheral side in the axial direction becomes large, the inner peripheral side of the rail is pressed against the upper surface and the lower surface of the groove of the piston, and is reliably attached to the groove of the piston.
【図１】本発明によるオイルリングを自動車のエンジン
のピストンに用いた場合の一実施例の構造を表す一部抽
出断面図である。FIG. 1 is a partially extracted cross-sectional view showing the structure of an embodiment in which an oil ring according to the present invention is used in a piston of an automobile engine.
【図２】その作用を表す一部抽出断面図である。FIG. 2 is a partially extracted cross-sectional view showing the action.
【図３】自動車のエンジンなどのピストンに用いられる
従来のオイルリングの一例の構造を表す一部抽出断面図
である。FIG. 3 is a partially extracted cross-sectional view showing a structure of an example of a conventional oil ring used for a piston of an automobile engine or the like.
【図４】その作用を表す一部抽出断面図である。FIG. 4 is a partially extracted cross-sectional view showing the action.
１ 上レール １ａ 取付部 １ｂ 傾斜部 １ｃ 当接部 １ｄ 支持部 ２ 下レール ２ａ 取付部 ２ｂ 傾斜部 ３ コイルエキスパンダ １０ レール １１ ピストン １１ａ 溝 １２ シリンダ １２ａ 凹部 1 Upper Rail 1a Mounting Part 1b Inclined Part 1c Abutting Part 1d Support Part 2 Lower Rail 2a Mounting Part 2b Inclined Part 3 Coil Expander 10 Rail 11 Piston 11a Groove 12 Cylinder 12a Recessed Part
Claims (2)
断面形状が外周側へ窄まる略Ｖ字型をなし、その外周が
シリンダの内壁に当接するレールと、 前記レールの内部に挿入され、当該レールを径方向外側
へ付勢するコイルエキスパンダとを備えてなることを特
徴とするオイルリング。1. A rail, which is annular and has a substantially V-shaped cross-section in a direction along an axis thereof, which is narrowed toward an outer peripheral side, and whose outer periphery abuts an inner wall of a cylinder, and is inserted into the inside of the rail. An oil ring, comprising: a coil expander that urges the rail outward in the radial direction.
大きくできるように外周近傍を摺動可能に係合させた上
レールと下レールとからなることを特徴とする請求項１
に記載のオイルリング。2. The rail comprises an upper rail and a lower rail slidably engaged with each other in the vicinity of the outer circumference so that the length of the inner circumference in the axial direction can be increased.
Oil ring described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11675395A JPH08312778A (en) | 1995-05-16 | 1995-05-16 | Oil ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11675395A JPH08312778A (en) | 1995-05-16 | 1995-05-16 | Oil ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08312778A true JPH08312778A (en) | 1996-11-26 |
Family
ID=14694904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11675395A Withdrawn JPH08312778A (en) | 1995-05-16 | 1995-05-16 | Oil ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08312778A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11199261B2 (en) * | 2017-03-31 | 2021-12-14 | Federal-Mogul Burscheid Gmbh | Play-free oil scraper ring |
-
1995
- 1995-05-16 JP JP11675395A patent/JPH08312778A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11199261B2 (en) * | 2017-03-31 | 2021-12-14 | Federal-Mogul Burscheid Gmbh | Play-free oil scraper ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020806 |