JPH08277938A - Sealing structure of oil filler cap - Google Patents

Sealing structure of oil filler cap

Info

Publication number
JPH08277938A
JPH08277938A JP8145795A JP8145795A JPH08277938A JP H08277938 A JPH08277938 A JP H08277938A JP 8145795 A JP8145795 A JP 8145795A JP 8145795 A JP8145795 A JP 8145795A JP H08277938 A JPH08277938 A JP H08277938A
Authority
JP
Japan
Prior art keywords
seal
filler cap
oil filler
oil
cap
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.)
Pending
Application number
JP8145795A
Other languages
Japanese (ja)
Inventor
Yoshinobu Uno
吉信 鵜野
Kazuyoshi Baba
和義 馬場
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.)
Daihatsu Motor Co Ltd
Original Assignee
Daihatsu Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daihatsu Motor Co Ltd filed Critical Daihatsu Motor Co Ltd
Priority to JP8145795A priority Critical patent/JPH08277938A/en
Publication of JPH08277938A publication Critical patent/JPH08277938A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Gasket Seals (AREA)

Abstract

PURPOSE: To prevent a return torque from become excessive by being brought into abnormal contact to the seal member of an oil filler cap with a counterpart metal flat surface part. CONSTITUTION: In a structure which is formed in such a constitution that a sealing material 3 made of ring shaped elastic body which is inserted in an oil filler cap 1, abuts on the seal surface 7 of an oiling port so as to from a seal part, a ring shaped projection 9 is arranged on either one of the seal material of the seal part of the seal surface 7.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は自動車用エンジンのオイ
ルフィラーキャップのシール構造に関するもので、特
に、オイルフィラーキャップの脱着性を容易化するよう
な分野で利用されるものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seal structure for an oil filler cap of an automobile engine, and more particularly to a field for facilitating the detachability of the oil filler cap.

【0002】[0002]

【従来の技術】図4は従来の技術を示すものであり、右
半分は縦断した側面であり、左半分は外観的な側面を図
示している。図示するように、オイルフィラーキャップ
1の下面に形成したリング溝2には、NBRゴム(石油
系オイルに対して耐油性、耐熱性が優れる)部材からな
る断面が矩形状のシール材3が嵌め込まれている。ま
た、同キャップ1下部の円筒状の外周面にはキャップ1
開閉用のねじ部4(雄ねじ)が形成されている。一方、
金属部材からなるシリンダヘッドカバー5には給油ポー
ト6が形成され、同カバー5の上面には平滑なシール面
7が形成されている。また、同給油ポート6下部の円筒
状の内周面にはオイルフィラーキャップ1のねじ部4と
係合するねじ部8(雌ねじ)が形成されている。そし
て、給油ポート6にオイルフィラーキャップ1を装着
し、オイルフィラーキャップを締め込んでいくと、シー
ル材3がシール面7に面接触すると共に接触面の面圧が
アップし、オイルのシール性能が向上する。なお、この
ようにシール用弾性体が金属平面に密着させられる構造
のものは、実開平2−22465号公報の第2図に開示
されている。
2. Description of the Related Art FIG. 4 shows a conventional technique, in which the right half is a longitudinal side surface and the left half is an external side surface. As shown in the figure, the ring groove 2 formed on the lower surface of the oil filler cap 1 is fitted with a seal material 3 made of an NBR rubber (having excellent oil resistance and heat resistance against petroleum oil) and having a rectangular cross section. Has been. Further, the cap 1 is provided on the cylindrical outer peripheral surface of the lower part of the cap 1.
A screw part 4 (male screw) for opening and closing is formed. on the other hand,
An oil supply port 6 is formed on the cylinder head cover 5 made of a metal member, and a smooth sealing surface 7 is formed on the upper surface of the cover 5. Further, a threaded portion 8 (female thread) that engages with the threaded portion 4 of the oil filler cap 1 is formed on the cylindrical inner peripheral surface below the oil supply port 6. Then, when the oil filler cap 1 is attached to the oil supply port 6 and the oil filler cap is tightened, the seal material 3 comes into surface contact with the seal surface 7, and the surface pressure of the contact surface increases, so that the oil sealing performance is improved. improves. The structure in which the sealing elastic body is brought into close contact with the flat metal surface is disclosed in FIG. 2 of Japanese Utility Model Laid-Open No. 22465/1990.

【0003】[0003]

【発明が解決しようとする課題】上述のような従来の技
術においては、以下に述べるような問題がある。シール
材とシール面とが面接触の状態にあると、オイルフィラ
ーキャップの装着前にシール面に付着していたオイル
が、オイルフィラーキャップを装着して締め込んでいく
と、最初はシール材とシール面との間に介在していたオ
イルが流体潤滑の効果(接触面の摩擦係数を減少)とし
て作用するため、キャップの締め付けトルクが小さくな
り必要以上に締め込んでしまう恐れがある。一方、キャ
ップを過度に締め込み過ぎると接触面の面圧が大きくア
ップし、今度は逆に接触面の間に介在していたオイルが
接触面から外に除去され、接触面は境界潤滑に近い状態
となる。このような状態で長時間経過(放置)すると、
接触面が固着状態となってキャップの戻しトルクが大き
くなり、場合によってはキャップを手で戻そうとしても
戻せなくなることがある。本発明は、これら従来の問題
を解決することを目的としている。
The above-mentioned conventional techniques have the following problems. If the seal material and the seal surface are in surface contact, the oil that had adhered to the seal surface before the oil filler cap was attached is tightened with the oil filler cap when the oil filler cap is tightened. Since the oil interposed between the seal surface and the seal surface acts as an effect of fluid lubrication (decreases the friction coefficient of the contact surface), the tightening torque of the cap becomes small, and there is a risk of tightening more than necessary. On the other hand, if the cap is tightened too much, the surface pressure of the contact surface will increase significantly, and the oil that was interposed between the contact surfaces will be removed to the outside from the contact surface, and the contact surface will be close to boundary lubrication. It becomes a state. If a long time passes (leaves) in such a state,
The contact surface becomes stuck and the return torque of the cap increases, and in some cases, even if the cap is manually returned, it may not be possible to return it. The present invention aims to solve these conventional problems.

【0004】[0004]

【課題を解決するための手段とその作用】上記の目的を
達成するため本発明は、オイルフィラーキャップに嵌め
込んだリング状の弾性体からなるシール材を給油ポート
のシール面に当接してシール部を形成するようにしたも
のにおいて、前記シール部のシール材およびシール面の
いずれか一方にリング状の突条を設けるようにしたの
で、シール材とシール面との接触面が線接触に近い状態
となってオイルをシールするように作用する。
Means for Solving the Problem and Its Action In order to achieve the above object, the present invention seals by contacting a sealing material made of a ring-shaped elastic body fitted in an oil filler cap with a sealing surface of an oil supply port. Since the ring-shaped ridge is provided on either one of the sealing material and the sealing surface of the sealing portion, the contact surface between the sealing material and the sealing surface is close to line contact. And acts to seal the oil.

【0005】[0005]

【実施例】以下、図示の実施例について本発明を詳しく
説明する。図1は本発明に係る第1の実施例を示すシー
ル材3とシール面7との接触面の状態を示す。ここで
は、接触面に複数のリング状の突条9を設けたシール材
3が平滑なシール面7と接触している。したがって、シ
ール材3とシール面7との接触幅が狭く線接触に近い状
態となり接触面積が大幅に減少する。このため、オイル
フィラーキャップ1を締め込んでいくと、シール面7に
付着していたオイルの一部は突条9間の谷部10に保持
される一方で接触面の面圧が急激にアップし、接触面の
間に介在していたオイルが接触面から外に除去されてし
まって接触面が境界潤滑に近い状態となる。図2は本発
明に係る第2の実施例を示すシール材3とシール面7と
の接触面の状態を示す。ここでは、給油ポ−ト6のシー
ル面7に複数のリング状の凹溝11を設け、これによっ
て突条12が形成される。ここにシール材3が押付けら
れると図示のように3箇所でリング線状の食込み部分が
形成される。そして、凹溝11には付着したオイルの一
部が保持される。シール材3とシール面7との接触面の
接触面積の減少や面圧のアップなどは、図1で述べた場
合と同じである。
The present invention will be described in detail below with reference to the illustrated embodiments. FIG. 1 shows a state of a contact surface between a seal material 3 and a seal surface 7 showing a first embodiment according to the present invention. Here, the sealing material 3 having a plurality of ring-shaped protrusions 9 on the contact surface is in contact with the smooth sealing surface 7. Therefore, the contact width between the seal material 3 and the seal surface 7 is narrow and the state is close to line contact, and the contact area is greatly reduced. Therefore, as the oil filler cap 1 is tightened, part of the oil adhering to the seal surface 7 is retained in the valleys 10 between the ridges 9, while the contact surface pressure rapidly increases. Then, the oil interposed between the contact surfaces is removed from the contact surfaces to the outside, so that the contact surfaces are in a state close to boundary lubrication. FIG. 2 shows the state of the contact surface between the seal member 3 and the seal surface 7 showing the second embodiment according to the present invention. Here, a plurality of ring-shaped recessed grooves 11 are provided in the sealing surface 7 of the oil supply port 6, and thereby the ridges 12 are formed. When the sealing material 3 is pressed here, ring-shaped bite portions are formed at three locations as shown in the figure. Then, a part of the adhered oil is held in the groove 11. The reduction of the contact area of the contact surface between the seal material 3 and the seal surface 7 and the increase of the surface pressure are the same as those described in FIG.

【0006】[0006]

【発明の効果】本発明は上記に説明したように構成され
ているので、以下に記載するような効果を奏する。キャ
ップを給油ポートに装着して締め込むときは、シール材
とシール面との接触面の面積が小さくなって面圧が大き
くアップするため、接触面に付着したオイルは早期の内
に除去されて締め付け回転が重くなる。したがって、キ
ャップの過締め付けを防止することができる。また、面
圧のアップによりオイルのシール性能を大幅に向上する
ことが出来る。一方、給油ポートに締め付けられたキャ
ップを戻すときは、面圧が大きいにもかかわらず全体の
接触面積が小さいため、結果的には接触面の摩擦抵抗が
小さくなってキャップを戻すときの戻しトルクも小さく
なり、キャップは容易に手で戻すことが出来る。また、
谷部に保持されたオイルもキャップを戻すときの潤滑効
果として作用し、戻しトルクの低減に寄与している。
Since the present invention is configured as described above, it has the following effects. When the cap is attached to the oil supply port and tightened, the area of the contact surface between the seal material and the seal surface becomes smaller and the surface pressure increases significantly, so the oil adhering to the contact surface will be removed early. The tightening rotation becomes heavy. Therefore, over-tightening of the cap can be prevented. Moreover, the sealing performance of oil can be greatly improved by increasing the surface pressure. On the other hand, when returning the cap tightened to the oil supply port, the total contact area is small despite the large surface pressure, so the frictional resistance of the contact surface is small and the return torque when returning the cap. Is smaller and the cap can be easily replaced by hand. Also,
The oil held in the valley also acts as a lubricating effect when the cap is returned, and contributes to the reduction of the return torque.

【0007】本発明および従来技術のキャップのシール
材によるキャップの戻しトルク(T)の比較テストの結
果の一例を表1に示す。
Table 1 shows an example of the result of a comparative test of the cap return torque (T) by the seal material of the cap of the present invention and that of the prior art.

【0008】[0008]

【表1】 [Table 1]

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

【図1】本発明の第1の実施例を示すシール材の縦断断
面図である。
FIG. 1 is a vertical cross-sectional view of a sealing material showing a first embodiment of the present invention.

【図2】本発明の第2の実施例を示すシール材の縦断断
面図である。
FIG. 2 is a vertical sectional view of a sealing material showing a second embodiment of the present invention.

【図3】オイルフィラーキャップ装着のシリンダヘッド
カバーの斜視図である。
FIG. 3 is a perspective view of a cylinder head cover equipped with an oil filler cap.

【図4】図3のA−A線断面図である。4 is a cross-sectional view taken along the line AA of FIG.

【符号の説明】[Explanation of symbols]

1 オイルフィラーキャップ 3 シール材 6 給油ポート 7 シール面 9 突条 12 突条 1 Oil filler cap 3 Sealing material 6 Oil supply port 7 Sealing surface 9 Projection 12 Projection

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】オイルフィラーキャップに嵌め込んだリン
グ状の弾性体からなるシール材を給油ポートのシール面
に当接してシール部を形成するようにしたものにおい
て、前記シール部のシール材およびシール面のいずれか
一方にリング状の突条を設けたことを特徴とするオイル
フィラーキャップのシール構造。
1. A seal material and a seal for the seal portion, wherein a seal material made of a ring-shaped elastic body fitted in an oil filler cap is brought into contact with a seal surface of an oil supply port to form a seal portion. A seal structure for an oil filler cap, characterized in that a ring-shaped protrusion is provided on one of the surfaces.
JP8145795A 1995-04-06 1995-04-06 Sealing structure of oil filler cap Pending JPH08277938A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8145795A JPH08277938A (en) 1995-04-06 1995-04-06 Sealing structure of oil filler cap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8145795A JPH08277938A (en) 1995-04-06 1995-04-06 Sealing structure of oil filler cap

Publications (1)

Publication Number Publication Date
JPH08277938A true JPH08277938A (en) 1996-10-22

Family

ID=13746939

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8145795A Pending JPH08277938A (en) 1995-04-06 1995-04-06 Sealing structure of oil filler cap

Country Status (1)

Country Link
JP (1) JPH08277938A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081952A1 (en) * 2001-04-05 2002-10-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Sealing system for an internal combustion engine
US6531737B2 (en) 1998-06-23 2003-03-11 Mitsubishi Denki Kabushiki Kaisha Semiconductor device having an improved interlayer contact and manufacturing method thereof
JP2007232014A (en) * 2006-02-28 2007-09-13 Nok Corp Gasket
US20120103992A1 (en) * 2010-10-28 2012-05-03 Sanyo Electric Co., Ltd. Plug member and low-temperature storage
JP2012519817A (en) * 2009-03-06 2012-08-30 タイコ、バルブズ、アンド、コントロールズ、リミテッド、パートナーシップ Gate valve with lubricated secondary seal
US8596482B2 (en) 2010-07-15 2013-12-03 Makita Corporation Liquid tank for working machine engine and liquid tank cap

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6531737B2 (en) 1998-06-23 2003-03-11 Mitsubishi Denki Kabushiki Kaisha Semiconductor device having an improved interlayer contact and manufacturing method thereof
WO2002081952A1 (en) * 2001-04-05 2002-10-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Sealing system for an internal combustion engine
US6868820B2 (en) 2001-04-05 2005-03-22 Dr. Ing. H.C.F. Porsche Ag Sealing system for an internal-combustion engine
JP2007232014A (en) * 2006-02-28 2007-09-13 Nok Corp Gasket
JP2012519817A (en) * 2009-03-06 2012-08-30 タイコ、バルブズ、アンド、コントロールズ、リミテッド、パートナーシップ Gate valve with lubricated secondary seal
US8596482B2 (en) 2010-07-15 2013-12-03 Makita Corporation Liquid tank for working machine engine and liquid tank cap
US20120103992A1 (en) * 2010-10-28 2012-05-03 Sanyo Electric Co., Ltd. Plug member and low-temperature storage

Similar Documents

Publication Publication Date Title
EP2151612B1 (en) Oil seal
EP3333464B1 (en) Sealing structure
US5176215A (en) Composite drain plug
US4515574A (en) Universal joint seal with multiple lips
JPS6151166B2 (en)
JPH08277938A (en) Sealing structure of oil filler cap
MXPA02000818A (en) Boundary gasket with integral bolt threads seals.
JP2009119390A (en) Drainage mechanism of fluid filter
JP2506246Y2 (en) Packing
JP2714635B2 (en) Universal joint boots
JPH0618764U (en) Seal ring
JPH026303Y2 (en)
JPS6131588Y2 (en)
JPH0645098Y2 (en) Lip seal
JPS6236962Y2 (en)
CN220979604U (en) Oil drain plug of oil pan, oil pan and diesel engine
JPH02248643A (en) Seal member for cylinder head cover
KR102399107B1 (en) Bonded Piston Seal For High Pressure
JPS6027256Y2 (en) Sealing device
JPH061923U (en) Seal stopper
JP2606587Y2 (en) Sliding seal structure
JPH02241954A (en) Seal member for cylinder head cover
JPH053788U (en) Sealing device
JPH0721964Y2 (en) Side rail of combination oil ring
JPH0225976Y2 (en)