CN100452586C - Mounting structure of spark plug tube seal - Google Patents
Mounting structure of spark plug tube seal Download PDFInfo
- Publication number
- CN100452586C CN100452586C CNB2004100685819A CN200410068581A CN100452586C CN 100452586 C CN100452586 C CN 100452586C CN B2004100685819 A CNB2004100685819 A CN B2004100685819A CN 200410068581 A CN200410068581 A CN 200410068581A CN 100452586 C CN100452586 C CN 100452586C
- Authority
- CN
- China
- Prior art keywords
- spark
- tube seal
- peristome
- plug tube
- spark plug
- 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.)
- Expired - Fee Related
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- Gasket Seals (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
To provide a plug tube seal fitting structure, simple in structure so that a plug tube seal can be easily fitted to a plug hole of a cylinder head cover and hardly detached. In this fitting structure of a plug tube seal in a plug hole, a plug tube is liquid-tightly connected from inside to the plug hole of a cylinder head cover in which an ignition plug is inserted. At least one annular groove 15 is formed extending in the circumferential direction on the inner peripheral surface 14 of an opening part 13 of the plug hole 10, a cylindrical outer ring part 21 formed by covering a metal annular member 25 of the plug tube seal 20 with an elastic member is pressed in the opening part of the plug hole 10, and a corresponding part 21a of the elastic member put on the metal annular member 25 of the plug tube seal 20 eats into the annular groove 15 formed on the inner peripheral surface 14 of the opening part 13 of the plug hole 10 to thereby fit the plug tube seal.
Description
Technical field
The present invention relates to the mounting structure of spark plug tube seal in a kind of spark-ignited internal combustion engine (plug tube seal) in spark-plug hole, this spark plug tube seal thickly is connected in the spark-plug hole that intercalation has the valve mechanism cover of ignition spark plug to spark plug tube from inboard liquid.
Background technology
In the past, as this type of mounting structure of spark plug tube seal, patent documentation 1 disclosed scheme for example.
Patent documentation 1 special fair 5-9911 communique
This patent documentation 1 disclosed mounting structure of spark plug tube seal, the sealing ring that is made of the elastomeric element that is equivalent to spark plug tube seal forms the cross section and is U word shape, its outside circle portion embeds the through hole of valve mechanism cover from the outside, and the inner peripheral surface of this through hole is by embedding direction nearside inner peripheral surface and by end difference the inboard inner peripheral surface of embedding direction that internal diameter dwindles being constituted.
This relatively through hole, the outer peripheral face of the outside circle portion of sealing ring is made of big footpath outer peripheral face and the corresponding path outer peripheral face that embeds the inboard inner peripheral surface of direction that correspondence embeds direction nearside inner peripheral surface, and embeds the end difference of the end difference contact through hole of through hole between big footpath outer peripheral face and path outer peripheral face from the outside.
Two inner peripheral surfaces of through hole are the peripheries that does not have groove etc. fully, even the outside circle portion of sealing ring is pressed into, also only the extrusion friction of the inner peripheral surface by relative outside circle portion is tried hard to keep and held, so come off easily because of the degree that applies of external force.
Summary of the invention
In view of this, the present invention aims to provide and a kind ofly utilizes simple structure to be easy to spark plug tube seal is installed in the spark-plug hole of valve mechanism cover, and the mounting structure of spark plug tube seal of difficult drop-off.
In order to achieve the above object, one of the present invention's mounting structure of spark plug tube seal, spark plug tube there is the inboard liquid of spark-plug hole of the valve mechanism cover of ignition spark plug thickly be connected in the mounting structure this spark-plug hole from intercalation at spark plug tube seal, inner peripheral surface at the peristome of described spark-plug hole forms at least one endless groove along circumferencial direction, be pressed into the peristome of described spark-plug hole by the tubular outer portion of the elastomeric element of the metal ring parts of described spark plug tube seal covering, the part corresponding to endless groove of the elastomeric element that is covered by the metal ring parts of described spark plug tube seal is engaging-in to be formed at the endless groove of inner peripheral surface of the peristome of described spark-plug hole, thereby described spark plug tube seal is installed.
Inner peripheral surface at the peristome of spark-plug hole forms endless groove, constitute simple structure, by the tubular outer portion of spark plug tube seal being pressed into the simple operation of this peristome, except that extrusion friction power, also make the elastomeric element of spark plug tube seal of corresponding endless groove engaging-in and fixing, can make spark plug tube seal that difficult drop-off more is installed.
The present invention's two is the mounting structure of spark plug tube seal one of according to the present invention, it is characterized in that, be formed at the endless groove of the peristome inner peripheral surface of described spark-plug hole, the inner peripheral surface of peristome that is pressed into the described relatively spark-plug hole in nearside groove side of direction forms the following acute angle of 90 degree.
The tubular outer portion of spark plug tube seal is pressed into the peristome of spark-plug hole, if the elastomeric element of the spark plug tube seal of corresponding endless groove is engaging-in, then elastomeric element is around going into to the inner peripheral surface of the peristome of relative spark-plug hole to form the nearside groove side that is pressed into direction of the acute angle below 90 degree, form reliable fixing so be pressed into the reciprocal power of direction relatively, can make spark plug tube seal that difficult drop-off more is installed.
The present invention's three is mounting structure of spark plug tube seal of two according to the present invention, it is characterized in that, the annular rim that intersect the inner peripheral surface of the peristome of described spark-plug hole and the described nearside groove side that is pressed into direction has been carried out chamfering.
When the tubular outer portion of spark plug tube seal is pressed into the peristome of spark-plug hole, because of the inner peripheral surface of the peristome of spark-plug hole be pressed into the annular rim that the nearside groove side of direction intersects and carried out deburring, so the elastomeric element of spark plug tube seal can be heaved at the endless groove place injury-freely, even and when extracting spark plug tube seal, apply under the situation of big external force, elastomeric element can be not impaired yet.
The present invention's four be one of according to the present invention～three in each mounting structure of spark plug tube seal, it is characterized in that, be formed at the endless groove of inner peripheral surface of the peristome of described spark-plug hole, the inner peripheral surface of peristome that is pressed into the described relatively spark-plug hole in inboard groove side of direction forms the obtuse angle.
When the tubular outer portion of spark plug tube seal is pressed into the peristome of spark-plug hole, because of the inner peripheral surface of the peristome of the relative spark-plug hole in inboard channel opening side that is pressed into direction forms the obtuse angle, when so even the elastomeric element of spark plug tube seal is heaved at the endless groove place, dwindle and extract easily from inboard channel opening side at the inner peripheral surface of spark-plug hole, can be pressed into swimmingly again, and be easy to install spark plug tube seal.
The present invention's five is the mounting structure of spark plug tube seal one of according to the present invention, it is characterized in that, the peristome of described spark-plug hole is the peristome towards described valve mechanism cover inboard, and described spark plug tube seal is pressed into the peristome of described spark-plug hole from described valve mechanism cover inboard.
Spark plug tube seal is that the inboard from valve mechanism cover is pressed into and installs, can not be so can form from the structure of outside dismounting, and after valve mechanism cover was installed on the cylinder head, spark plug tube seal can not come off because of the external force from the outside fully.
Description of drawings
Fig. 1 is the profile of the valve mechanism cover of the internal combustion engine that relates to of an embodiment of the invention.
Fig. 2 is its major part enlarged drawing.
Fig. 3 is the profile of spark plug tube seal.
Fig. 4 is the major part enlarged drawing of the spark plug tube seal of valve mechanism cover.
Fig. 5 is its major part enlarged drawing.
Fig. 6 is the profile under the spark plug tube installment state.
Fig. 7 is the major part enlarged drawing of the variation of expression endless groove.
Symbol description
1 valve mechanism cover; 2 cavaeras; 3 breather chamber; 4 baffle plates; 5 horizontally-guided pipes (level guidetube); 6 spark plug tubes; 8 cylinder head; 9 combustion chambers; 10 spark-plug holes; 11 upside peristomes; 12 inside cylindrical portions; 13 inboard peristomes; 14 inner peripheral surfaces; 15 endless grooves; The 15a groove bottom; 15b nearside groove side; The inboard groove of 15c side; 16,17 cut sides; 20 spark plug tube seals; 21 tubular outer portion; 22 internal ring portions; 23 ring-type connecting portions; 25 metallic cylinder parts; 26 springs; 50 inboard peristomes; 51 inner peripheral surfaces; 52 endless grooves; The 52a groove bottom; 52b nearside groove side; The inboard groove of 52c side.
Embodiment
Below, according to Fig. 1～Fig. 7 the mounting structure of spark plug tube seal that an embodiment of the invention relate to is described.
The internal combustion engine that has been suitable for present embodiment is an in-line four cylinder four-stroke cycle spark-ignited internal combustion engine.
Fig. 1 is the profile of the valve mechanism cover 1 of this internal combustion engine.
Valve mechanism cover 1 is made of all around sidewall 1a and roof 1b, is covered (with reference to Fig. 6) by cylinder head 8, constitutes the cavaera 2 that inside is provided with valve mechanism (not shown).
The left and right sides of the roof 1b of valve mechanism cover 1 is heaved up, and this inner space of heaving forms breather chamber 3 by the division of baffle plate 4.
This roof 1b be formed with breather chamber 3 about the recess heaved between the part form spark-plug hole 10.
Heave the outer edge setting-in of part a side and horizontally-guided pipe (level guide tube) 5.
The upside peristome 11 that spark-plug hole 10 is extended slightly by in the outside (top), the inside cylindrical portion 12 of extending and inboard peristome 13 formations of extending from a more inside side of inside cylindrical portion 12 from inboard (below), their formed central shafts are all identical, and promptly the internal diameter of the upside peristome 11 of axis L, inside cylindrical portion 12, inboard peristome 13 becomes big in turn.
The external diameter of inside cylindrical portion 12 is bigger than the external diameter of the inboard peristome 13 of its below, forms end difference at its boundary, and described baffle plate 4 contacts this end difference from the below, forms inboard peristome 13 from the outstanding structure of baffle plate 4 downwards.
Spark plug tube seal 20 described later is pressed into the inboard peristome 13 of this spark-plug hole 10 from the inboard.
Spark plug tube seal 20 forms an endless groove 15 along circumferencial direction on the inner peripheral surface 14 of the bulged-in inboard peristome 13 from the inboard.
This endless groove 15 as shown in Figure 2, limiting by groove bottom 15a, the nearside groove side 15b that is pressed into direction and inboard groove side 15c, groove bottom 15a is to be the periphery of central axis with L, the nearside groove side 15b that is pressed into direction is the anchor ring vertical with axis L, and the inboard groove side 15c that is pressed into direction is to be the taper seat of central axis with L.
The nearside groove side 15b that is pressed into direction is vertical with axis L, so the inner peripheral surface 14 of its relative inner peristome 13 has the angle of 90 degree, is pressed into 14 one-tenth obtuse angles of inner peripheral surface of the inboard groove side 15c relative inner peristome 13 of direction.
In addition, the annular rim of intersection that is pressed into the inner peripheral surface 14 of the nearside groove side 15b of direction and inboard peristome 13 has been carried out chamfering, forms cone shape cut sides 16.
And the openend inner peripheral of inboard peristome 13 has also carried out chamfering, forms cone shape cut sides 17.
The above-described spark plug tube seal 20 that is pressed into the inboard peristome 13 of spark-plug hole 10 is rubber system endless member as shown in Figure 3, by the tubular outer portion 21 of having buried metallic cylinder parts 25 underground and within it side spring 26 is buried underground internal ring portion 22 circlewise and tubular outer portion 21 and internal ring portion 22 are connected into the cross section is that the ring-type connecting portion 23 of U word shape constitutes.
The external diameter of the tubular outer portion 21 of lining rubber is bigger slightly than the internal diameter of the inboard peristome 13 of spark-plug hole 10 on metallic cylinder parts 25.
And the internal diameter of the internal ring portion 22 of lining rubber is littler than the external diameter of spark plug tube 30 on spring 26.
The tubular outer portion 21 of aforesaid spark plug tube seal 20 is pressed into the inboard peristome 13 of spark-plug hole 10 from the inboard of valve mechanism cover 1.
One side is guiding one side to be inserted into inboard peristome 13 by the outside rubber components of metallic cylinder parts 25 compressions of tubular outer portion 21 by the cut sides 17 of the openend inner peripheral of inboard peristome 13, the rubber components that touches the endless groove 15 of inner peripheral surface 14 is heaved in endless groove 15 smoothly along cut sides 16, and the rubber components of heaving in endless groove 15 is that inboard groove side 15c carries out undergauge smoothly along the taper seat that relative inner peripheral surface 14 forms the obtuse angle, and is pressed into assigned position.
Like this, carry out being pressed into of spark plug tube seal 20 swimmingly, be pressed into easily, and rubber components can damaged along the cut sides 17 of inboard peristome 13 and the inboard groove side 15c of taper of endless groove 15.
Fig. 4 and Fig. 5 represent that spark plug tube seal 20 is pressed into the state of the inboard peristome 13 that is installed in spark-plug hole 10.
When the 20 bulged-in whiles of spark plug tube seal, the rubber components of corresponding endless groove 15 is formed on heaves engaging-in state in the endless groove, this is heaved the 21a of portion and is fixed on the nearside groove side 15b vertical with central axis L, keeping spark plug tube seal 20 together with the extrusion friction power of rubber components, making its difficult drop-off.
In addition, spark plug tube seal 20 is by from the inboard peristome 13 of installed inside in spark-plug hole 10, because the outer openings portion 11 of spark-plug hole 10 and the internal diameter of inside cylindrical portion 12 are littler than the internal diameter of inboard peristome 13, so spark plug tube seal 20 can not come off from the outside of valve mechanism cover 1 fully.
At the internal ring portion 22 of the spark plug tube seal 20 that is pressed into the inboard peristome 13 that is installed in this spark-plug hole 10, embedding the upper end of spark plug tube 6 cylindraceous as shown in Figure 6, and it increases internal ring portion 22 diameters by extruding.The lower end of spark plug tube 6 embeds among the spark-plug hole 8a of the combustion chamber 9 that connects cylinder head 8.
Like this, spark plug tube 6 configuration by last lower support, plays as the effect of guard shield of holding concurrently of the miter guide of intercalation ignition spark plug.
Because the embedding of spark plug tube 6, the internal ring portion 13 of spark plug tube seal 20 and the spring of being buried underground 26 increase diameter simultaneously, and fixing spark plug tube 6 and sealing is so even also can seal reliably when a little desaxe appears in spark plug tube 6.
Below, Fig. 7 represents the variation of the endless groove 15 on the inner peripheral surface 14 of inboard peristome 13 of spark-plug hole 10.
The endless groove 52 that is formed at the inner peripheral surface 51 of this inboard peristome 50 is being limited by groove bottom 52a, the nearside groove side 52b that is pressed into direction and inboard groove side 52c, groove bottom 52a is identical with aforementioned embodiments with inboard groove side 52c, but is pressed into the taper seat of the relative inner peripheral surface 51 formation acute angles of nearside groove side 52b of direction.
In addition, the annular rim of intersection that is pressed into the inner peripheral surface 51 of the nearside groove side 52b of direction and inboard peristome 50 is level and smooth curved surface, and has carried out chamfering.
Therefore, (identical at spark plug tube seal 20 with aforementioned embodiments, use same-sign) tubular outer portion 21 when being pressed into inboard peristome 50, as shown in Figure 7, the rubber components of corresponding endless groove 52 is heaved in endless groove 52 and is engaging-in, this is heaved the 21a of portion and is fixed on relative inner peripheral surface 51 and forms on the nearside groove side 52b of acute angle taper seats, is pressed into reciprocal power fixing more reliable of direction relatively, can make spark plug tube seal 20 that difficult drop-off more is installed.
In addition, when being pressed into spark plug tube seal 20, because of the annular rim of the intersection of the inner peripheral surface 51 of the nearside groove side 52b that is pressed into direction and inboard peristome 50 is level and smooth curved surfaces and has carried out chamfering, thus rubber components when endless groove 62 is heaved, can damaged.
In the above-described embodiment, form an endless groove, but also can endless groove more than two be set at inner peripheral surface at the inner peripheral surface 14 of the inboard peristome of spark-plug hole.
The present invention can be applied to all spark-ignited internal combustion engines.
Claims (5)
1. mounting structure of spark plug tube seal, spark plug tube seal has spark plug tube the inboard liquid of spark-plug hole of the valve mechanism cover of ignition spark plug thickly to be connected this spark-plug hole from intercalation, it is characterized in that,
Inner peripheral surface at the peristome of described spark-plug hole forms at least one endless groove along circumferencial direction;
Be pressed into the peristome of described spark-plug hole by the tubular outer portion of the elastomeric element of the metal ring parts of described spark plug tube seal covering;
The part corresponding to endless groove of the elastomeric element that is covered by the metal ring parts of described spark plug tube seal is engaging-in to be formed at the endless groove of inner peripheral surface of the peristome of described spark-plug hole, so that described spark plug tube seal to be installed.
2. mounting structure of spark plug tube seal according to claim 1, it is characterized in that, be formed at the acute angle of endless groove below inner peripheral surface formation 90 degree of the peristome of the described relatively spark-plug hole in nearside groove side that is pressed into direction of the peristome inner peripheral surface of described spark-plug hole.
3. mounting structure of spark plug tube seal according to claim 2 is characterized in that, the annular rim that intersect the inner peripheral surface of the peristome of described spark-plug hole and the described nearside groove side that is pressed into direction has been carried out chamfering.
4. according to each described mounting structure of spark plug tube seal in the claim 1～3, it is characterized in that the endless groove of inner peripheral surface that is formed at the peristome of described spark-plug hole forms the obtuse angle at the inner peripheral surface of the peristome of the described relatively spark-plug hole in inboard groove side that is pressed into direction.
5. mounting structure of spark plug tube seal according to claim 1, it is characterized in that, the peristome of described spark-plug hole is towards the peristome of described valve mechanism cover inboard, and described spark plug tube seal is pressed into the peristome of described spark-plug hole from described valve mechanism cover inboard.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003302724A JP2005069166A (en) | 2003-08-27 | 2003-08-27 | Plug tube seal mounting structure |
| JP2003302724 | 2003-08-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1592013A CN1592013A (en) | 2005-03-09 |
| CN100452586C true CN100452586C (en) | 2009-01-14 |
Family
ID=34406930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100685819A Expired - Fee Related CN100452586C (en) | 2003-08-27 | 2004-08-27 | Mounting structure of spark plug tube seal |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2005069166A (en) |
| CN (1) | CN100452586C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4709068B2 (en) * | 2006-05-31 | 2011-06-22 | 株式会社マーレ フィルターシステムズ | Head cover seal structure |
| JP2007327378A (en) * | 2006-06-07 | 2007-12-20 | Honda Motor Co Ltd | Mounting structure for spark plug tube |
| JP6008271B2 (en) * | 2012-03-29 | 2016-10-19 | パナソニックＩｐマネジメント株式会社 | Control switch for automatic transmission |
| JP6220320B2 (en) * | 2014-07-28 | 2017-10-25 | 株式会社ハイレックスコーポレーション | Seal structure |
| JP2023043896A (en) * | 2020-03-12 | 2023-03-30 | アルプスアルパイン株式会社 | Side stand switch and side stand device |
| CN113983167A (en) * | 2021-11-08 | 2022-01-28 | 郑州机械研究所有限公司 | Two-stage combined sealing structure for ultrahigh pressure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2126750Y (en) * | 1992-07-04 | 1993-02-03 | 李�浩 | Energy-saving sparking-plug |
| CN2127526Y (en) * | 1992-07-08 | 1993-02-24 | 门晓光 | Fuel-saving sparking plug |
| US5664954A (en) * | 1996-03-28 | 1997-09-09 | General Motors Corporation | Spark plug boot assembly |
| JPH09260023A (en) * | 1996-03-26 | 1997-10-03 | Ngk Spark Plug Co Ltd | Spark plug having ion probe |
| CN1082267C (en) * | 1994-10-14 | 2002-04-03 | 住友电装株式会社 | Plug cap for internal combustion engines |
-
2003
- 2003-08-27 JP JP2003302724A patent/JP2005069166A/en active Pending
-
2004
- 2004-08-27 CN CNB2004100685819A patent/CN100452586C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2126750Y (en) * | 1992-07-04 | 1993-02-03 | 李�浩 | Energy-saving sparking-plug |
| CN2127526Y (en) * | 1992-07-08 | 1993-02-24 | 门晓光 | Fuel-saving sparking plug |
| CN1082267C (en) * | 1994-10-14 | 2002-04-03 | 住友电装株式会社 | Plug cap for internal combustion engines |
| JPH09260023A (en) * | 1996-03-26 | 1997-10-03 | Ngk Spark Plug Co Ltd | Spark plug having ion probe |
| US5664954A (en) * | 1996-03-28 | 1997-09-09 | General Motors Corporation | Spark plug boot assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005069166A (en) | 2005-03-17 |
| CN1592013A (en) | 2005-03-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20110827 |