CN206617241U - A kind of spark plug and cylinder cover of natural gas engine - Google Patents
A kind of spark plug and cylinder cover of natural gas engine Download PDFInfo
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- CN206617241U CN206617241U CN201720181064.5U CN201720181064U CN206617241U CN 206617241 U CN206617241 U CN 206617241U CN 201720181064 U CN201720181064 U CN 201720181064U CN 206617241 U CN206617241 U CN 206617241U
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- spark plug
- shaft part
- cylinder head
- natural gas
- nut
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Abstract
The utility model provides a kind of spark plug, including spark plug body and the spark plug nut being arranged on spark plug body, spark plug body bottom is provided with external thread section, spark plug body, which has, is used for the avoidance shaft part corresponding with the bottom water jacket of cylinder head center lug, avoid shaft part to be located between spark plug nut and external thread section, the external diameter for avoiding shaft part is less than the external diameter of spark plug nut.The utility model is by the structure of spark plug diameter maximum --- spark plug nut is integrally moved up, make spark plug polycrystalline substance elongated, avoid cylinder cover for diesel engine center lug wall thickness thin location, or the narrower place of water jacket, when solving diesel engine Curve guide impeller for natural gas engine, spark plug mounting hole or spark plug bushing in cylinder head are difficult to arrange, or cloth postpones the problem of influenceing cylinder head center hole strength or cylinder head cooling performance.The utility model additionally provides a kind of cylinder cover of natural gas engine with above-mentioned spark plug.
Description
Technical field
The utility model is related to technical field of engines, and more specifically to a kind of spark plug, the utility model is also related to
And a kind of cylinder cover of natural gas engine with above-mentioned spark plug.
Background technology
The less brand-new design of usual natural gas engine, but the Curve guide impeller on the basis of diesel engine or gasoline engine, institute
Necessarily to be limited by original diesel engine or gasoline engine structure.
So that cylinder cover for diesel engine is changed to cylinder cover of natural gas engine as an example, the structure of fuel injector is installed at cylinder head center
Need Curve guide impeller the structure of spark plug is installed.Spark plug mounting hole (linerless nested structure cylinder head) or fire in cylinder head
During flower plug bushing (having bush structure cylinder head) design, due to the position of spark plug nut and the close combustion of the center lug of cylinder head
The bottom water jacket position correspondence of room is burnt, it is larger to be frequently run onto spark plug nut size, spark plug mounting hole or spark plug bushing are difficult
To arrange；Even if or can arrange, can also reduce the center lug wall thickness (linerless nested structure) in cylinder cover for diesel engine original structure,
Or the water jacket volume (having bush structure) in reduction cylinder cover for diesel engine original structure, it will also influence the intensity of cylinder head centre bore
Or the problem of cylinder head cooling performance.
In summary, when how to solve diesel engine Curve guide impeller for natural gas engine, the spark plug in cylinder head is installed
Hole or spark plug bushing are difficult to arrange, or cloth postpones the problem of influenceing cylinder head center hole strength or cylinder head cooling performance, is
Current those skilled in the art technical problem urgently to be resolved hurrily.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of spark plug, to solve diesel engine Curve guide impeller as day
During right gas engine, spark plug mounting hole or spark plug bushing in cylinder head are difficult to arrange, or cloth is postponed in influence cylinder head
The problem of heart hole strength or cylinder head cooling performance.
Another object of the present utility model is a kind of cylinder cover of natural gas engine with above-mentioned spark plug of offer, with
When solving diesel engine Curve guide impeller for natural gas engine, spark plug mounting hole or spark plug bushing in cylinder head are difficult to cloth
Put, or cloth postpones the problem of influenceing cylinder head center hole strength or cylinder head cooling performance.
In order to achieve the above object, the utility model provides following technical scheme：
A kind of spark plug, including spark plug body and the spark plug nut being arranged on the spark plug body, the fire
Flower plug body bottom is provided with external thread section, and the spark plug body, which has, is used for the bottom water jacket phase with cylinder head center lug
Corresponding avoidance shaft part, the avoidance shaft part is located between the spark plug nut and the external thread section, the avoidance shaft part
External diameter be less than the spark plug nut external diameter.
It is preferred that, in above-mentioned spark plug, the outer wall for avoiding shaft part is smooth, cylindrical peripheral surface.
It is preferred that, in above-mentioned spark plug, the outer wall for avoiding shaft part is provided with external screw thread.
It is preferred that, in above-mentioned spark plug, the spark plug body is integral type structure with the spark plug nut.
It is preferred that, in above-mentioned spark plug, the external diameter for avoiding shaft part is equal to the external diameter of the external thread section.
It can be seen from above-mentioned technical scheme that, the spark plug that the utility model is provided includes spark plug body and is arranged on
Spark plug nut on spark plug body, spark plug body bottom is provided with external thread section, and spark plug body, which has, to be used for and gas
The corresponding avoidance shaft part of the bottom water jacket of cylinder cap center lug, avoids shaft part and is located between spark plug nut and external thread section,
The external diameter for avoiding shaft part is less than the external diameter of spark plug nut.
During installation, by special tooling tight spark plug nut, make external thread section on spark plug body and cylinder head
The first screw-internal thread fit on spark plug mounting hole or spark plug bushing, now, avoids the bottom of shaft part and cylinder head center lug
Portion's water jacket is corresponding, and spark plug nut is corresponding with the position on the upside of bottom water set, so that avoiding bavin at spark plug largest outside diameter
Blank is compared with weakness (linerless nested structure cylinder head) or the narrower place of water jacket (having bush structure cylinder head) in oil machine cylinder head.
In summary, the utility model is by the structure of spark plug diameter maximum --- spark plug nut is integrally moved up, and is made
Spark plug polycrystalline substance is elongated, cylinder cover for diesel engine center lug wall thickness thin location, or the narrower place of water jacket is avoided, so as to close
Removing the work puts the spark plug mounting hole or spark plug bushing of cylinder cover of natural gas engine, reaches that cylinder cover for diesel engine Curve guide impeller is
Cylinder cover of natural gas engine, one-step optimization cylinder head intensity of going forward side by side and the purpose of cooling performance, therefore can solve the problem that diesel engine changes
When entering to be designed as natural gas engine, spark plug mounting hole or spark plug bushing in cylinder head are difficult to arrange, or cloth postpones shadow
The problem of ringing cylinder head center hole strength or cylinder head cooling performance.
In addition, the utility model according to the concrete condition of cylinder head blank, can change the particular location of spark plug nut, keep away
Cylinder head blank is allowed compared with weakness or the narrower place of water jacket, scheme flexibly, using wider.Original cylinder of diesel engine need not be changed simultaneously
Lid blank, only changes the local machining dimension of centre bore, you can by cylinder cover for diesel engine Curve guide impeller be natural gas engine gas
Cylinder cap, the improvement cycle is shorter, cost is relatively low, technics comparing is simple, easily realizes, there is huge economic benefit.The utility model
It can be applicable to spark plug bushing originally with cylinder head to interfere, it is impossible to the situation of arrangement.
The utility model additionally provides a kind of cylinder cover of natural gas engine, including cylinder cap body and is arranged on the cylinder cap
Spark plug on body, the spark plug is any of the above-described kind of spark plug, because above-mentioned spark plug has the effect above, with upper
Stating the cylinder cover of natural gas engine of spark plug has same effect, therefore repeats no more herein.
It is preferred that, in above-mentioned cylinder cover of natural gas engine, spark plug mounting hole or fire are provided with the cylinder cap body
Flower plug bushing, the spark plug mounting hole or the spark plug bushing have first that the external thread section with the spark plug coordinates
Internal thread.
It is preferred that, in above-mentioned cylinder cover of natural gas engine, the outer wall for avoiding shaft part is smooth, cylindrical peripheral surface, the fire
Flower plug mounting hole or the spark plug bushing have the unthreaded hole section coordinated with the smooth, cylindrical peripheral surface.
It is preferred that, in above-mentioned cylinder cover of natural gas engine, the outer wall for avoiding shaft part is provided with external screw thread, the fire
Flower plug mounting hole or the spark plug bushing have the second internal thread coordinated with the avoidance shaft part screw thread.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are these
Some embodiments of utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to these accompanying drawings.
Fig. 1 is the structural representation for the spark plug that the utility model embodiment is provided；
Fig. 2 is the structural representation for the cylinder cover of natural gas engine that the utility model embodiment one is provided；
Fig. 3 is the structural representation for the cylinder cap body that the utility model embodiment one is provided；
Fig. 4 is the structural representation for the cylinder cover of natural gas engine that the utility model embodiment two is provided.
Embodiment
The utility model embodiment provides a kind of spark plug, solves diesel engine Curve guide impeller for natural gas engine
When, spark plug mounting hole or spark plug bushing in cylinder head are difficult to arrange, or cloth postpone influence cylinder head center hole strength or
The problem of cylinder head cooling performance.
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to
The scope of the utility model protection.
Accompanying drawing 1 is refer to, the spark plug that the utility model embodiment is provided includes spark plug body 1 and is arranged on spark plug
Spark plug nut 2 on body 1, the bottom of spark plug body 1 is provided with external thread section 11, and spark plug body 1, which has, to be used for and gas
The corresponding avoidance shaft part 12 of the bottom water jacket of cylinder cap center lug, avoids shaft part 12 and is located at spark plug nut 2 and external thread section
Between 11, the external diameter for avoiding shaft part 12 is less than the external diameter of spark plug nut 2.
It should be noted that cylinder head center lug is the columned cast structure in cylinder head center, for processing spray
Oily device mounting hole or spark plug mounting hole 31.Bottom water jacket refers to the water jacket close to combustor side, spark plug sheet in cylinder head
The bottom of body 1 is the one end of spark plug body 1 close to combustion chamber.
During installation, by special tooling tight spark plug nut 2, make external thread section 11 and the cylinder on spark plug body 1
The first internal thread 6 on the spark plug mounting hole 31 or spark plug bushing 4 of lid coordinates, now, avoids in shaft part 12 and cylinder head
The bottom water jacket of heart lug is corresponding, and spark plug nut 2 is corresponding with the position on the upside of bottom water set, so that spark plug external diameter is most
General goal avoids blank in cylinder cover for diesel engine (has bush structure gas compared with weakness (linerless nested structure cylinder head) or the narrower place of water jacket
Cylinder cap).
In summary, the utility model is by the structure of spark plug diameter maximum --- spark plug nut 2 is overall to be moved up, and is made
Spark plug polycrystalline substance is elongated, cylinder cover for diesel engine center lug wall thickness thin location, or the narrower place of water jacket is avoided, so as to close
Removing the work puts the spark plug mounting hole 31 or spark plug bushing 4 of cylinder cover of natural gas engine, reaches that cylinder cover for diesel engine is improved and sets
Cylinder cover of natural gas engine is calculated as, one-step optimization cylinder head intensity of going forward side by side and the purpose of cooling performance, therefore can solve the problem that diesel oil
When machine Curve guide impeller is natural gas engine, spark plug mounting hole 31 or spark plug bushing 4 in cylinder head are difficult to arrange, or cloth
The problem of postponing influence cylinder head center hole strength or cylinder head cooling performance.
In addition, the utility model can be according to the concrete condition of cylinder head blank, the particular location of change spark plug nut 2,
Cylinder head blank is avoided compared with weakness or the narrower place of water jacket, scheme flexibly, using wider.Original diesel engine gas need not be changed simultaneously
Cylinder-cover blank, only changes the local machining dimension of centre bore, you can by cylinder cover for diesel engine Curve guide impeller be natural gas engine
Cylinder head, the improvement cycle is shorter, cost is relatively low, technics comparing is simple, easily realizes, there is huge economic benefit.This practicality is new
Type can be applicable to the script of spark plug bushing 4 interferes with cylinder head, it is impossible to the situation of arrangement.
In a kind of specific embodiment of the utility model, the outer wall for avoiding shaft part 12 is smooth, cylindrical peripheral surface, the avoidance shaft part
12 non-threadeds, are easy to the processing of spark plug, accordingly, have the unthreaded hole coordinated with it in cylinder head, also allow for cylinder head processing.
Certainly, above-mentioned avoidance shaft part 12 can also be the shiny surface of other shapes, such as ellipse.
In another specific embodiment of the utility model, the outer wall for avoiding shaft part 12 is provided with external screw thread.The present embodiment
The threaded connection length of spark plug and cylinder head is added by the increased external screw thread, bonding strength is improved, increased simultaneously
Threaded connection length can also increase the contact area of spark plug and cylinder head, beneficial to spark plug radiate and cool down.It can manage
Solution, the cross section of above-mentioned avoidance shaft part 12 can also be other shapes, and such as rectangle avoids the outer of shaft part 12 as long as meeting
Footpath is less than the external diameter of spark plug nut 2.
In order to improve the bonding strength of spark plug body 1 and spark plug nut 2, it is preferred that spark plug body 1 and spark plug
Nut 2 is integral type structure.Certainly, spark plug body 1 and spark plug nut 2 are that integral type structure can also be split type knot
Structure, it is connected by being welded and fixed.
In order to further optimize above-mentioned technical proposal, the external diameter for avoiding shaft part 12 is equal to the external diameter of external thread section 11.So
External thread section 11 can be processed simultaneously and the blank of shaft part 12 is avoided, and further simplify process.Certainly, it is above-mentioned to keep away
The external diameter of shaft part 12 is allowed to be more than or less than the external diameter of external thread section 11, the utility model is not specifically limited to this.
Accompanying drawing 2-4 is refer to, the utility model embodiment additionally provides a kind of cylinder cover of natural gas engine, including cylinder cap
Body 3 and the spark plug being arranged on cylinder cap body 3, the spark plug that the spark plug provides for any of the above-described embodiment are solved
When diesel engine Curve guide impeller is natural gas engine, spark plug mounting hole 31 or spark plug bushing 4 in cylinder head are difficult to cloth
Put, or cloth postpones the problem of influenceing cylinder head center hole strength or cylinder head cooling performance, its advantage is brought by spark plug,
Part related in above-described embodiment specifically is refer to, is just repeated no more herein.
In specific embodiment, spark plug mounting hole 31 or spark plug bushing 4, spark plug are provided with cylinder cap body 3
Mounting hole 31 or spark plug bushing 4 have the first internal thread 6 that the external thread section 11 with spark plug coordinates.
As Figure 2-3, in cylinder head during linerless nested structure, by special tooling tight spark plug nut 2, spark plug is made
External thread section 11 on body 1 coordinates with the first internal thread 6 on the spark plug mounting hole 31 of cylinder head, now, avoids shaft part
12 is corresponding with the bottom water jacket of cylinder head center lug, and spark plug nut 2 is corresponding with the position on the upside of bottom water set, so that
Blank in cylinder cover for diesel engine is avoided at spark plug largest outside diameter, compared with weakness, makes the wall thickness thinnest part a-quadrant thickness of script bright
Aobvious increase, solves the problem of spark plug mounting hole 31 can not be arranged, and it is weak to improve local strength at cylinder head mounting hole
The problem of.
As shown in figure 4, when having bush structure in cylinder head, by special tooling tight spark plug nut 2, making spark plug sheet
External thread section 11 on body 1 coordinates with the first internal thread 6 on the spark plug bushing 4 of cylinder head, now, avoids shaft part 12 and gas
The bottom water jacket of cylinder cap center lug is corresponding, and spark plug nut 2 is corresponding with the position on the upside of bottom water set, so that spark plug
The narrower place of water jacket in cylinder cover for diesel engine is avoided at largest outside diameter, the most narrow place B Domain Volumes increase of water jacket improves coolant
Flowing, improves the cooling performance of cylinder head.It should be noted that as shown in figure 4, this structure, more than spark plug bushing 4
On have and also there is the internal thread on internal thread, spark plug bushing 4 and cylinder head to be one section of screw thread in the first internal thread 6, cylinder head, i.e.,
Time processing is formed, and is coordinated together with spark plug.
Certainly, above-mentioned spark plug mounting hole 31 or spark plug bushing 4 can also be not provided with above-mentioned first internal thread 6, only lead to
The mode of interference fit is connected with spark plug.
In the specific embodiment of the utility model one, the outer wall for avoiding shaft part 12 is smooth, cylindrical peripheral surface, spark plug mounting hole
31 or spark plug bushing 4 have with smooth, cylindrical peripheral surface coordinate unthreaded hole section 5, be easy to processing.
In another specific embodiment, the outer wall for avoiding shaft part 12 is provided with external screw thread, spark plug mounting hole 31 or spark
Filling in bushing 4 has with avoiding the second internal thread that the screw thread of shaft part 12 coordinates, and the threaded connection for adding spark plug and cylinder head is long
Degree, improves spark plug and the bonding strength of cylinder head；The first internal thread 6 and the second internal thread, structure can also be processed simultaneously
Simply, it is easy to processing.
It is understood that the cross section of above-mentioned avoidance shaft part 12 can also be other shapes, such as rectangle, accordingly,
Spark plug mounting hole 31 or spark plug bushing 4 have matched shape.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other
Between the difference of embodiment, each embodiment identical similar portion mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.A variety of modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where not departing from spirit or scope of the present utility model.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (9)
1. a kind of spark plug, including spark plug body (1) and the spark plug nut (2) that is arranged on the spark plug body (1),
Spark plug body (1) bottom is provided with external thread section (11), it is characterised in that the spark plug body (1), which has, to be used for
The avoidance shaft part (12) corresponding with the bottom water jacket of cylinder head center lug, the avoidance shaft part (12) is located at the spark plug
Between nut (2) and the external thread section (11), the external diameter for avoiding shaft part (12) is less than the outer of the spark plug nut (2)
Footpath.
2. spark plug according to claim 1, it is characterised in that the outer wall of the avoidance shaft part (12) is smooth cylindrical
Face.
3. spark plug according to claim 1, it is characterised in that the outer wall of the avoidance shaft part (12) is provided with outer spiral shell
Line.
4. spark plug according to claim 1, it is characterised in that the spark plug body (1) and the spark plug nut
(2) it is integral type structure.
5. the spark plug according to claim any one of 1-4, it is characterised in that the external diameter of the avoidance shaft part (12) is equal to
The external diameter of the external thread section (11).
6. a kind of cylinder cover of natural gas engine, including cylinder cap body (3) and the spark that is arranged on the cylinder cap body (3)
Plug, it is characterised in that the spark plug is spark plug as claimed in claim 1.
7. cylinder cover of natural gas engine according to claim 6, it is characterised in that set on the cylinder cap body (3)
There are spark plug mounting hole (31) or spark plug bushing (4), the spark plug mounting hole (31) or the spark plug bushing (4) have
The first internal thread (6) coordinated with the external thread section (11) of the spark plug.
8. cylinder cover of natural gas engine according to claim 7, it is characterised in that the outer wall of the avoidance shaft part (12)
For smooth, cylindrical peripheral surface, the spark plug mounting hole (31) or the spark plug bushing (4) have and smooth, cylindrical peripheral surface cooperation
Unthreaded hole section (5).
9. cylinder cover of natural gas engine according to claim 7, it is characterised in that the outer wall of the avoidance shaft part (12)
External screw thread is provided with, the spark plug mounting hole (31) or the spark plug bushing (4) have and described avoidance shaft part (12) spiral shell
The second internal thread that line coordinates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720181064.5U CN206617241U (en) | 2017-02-27 | 2017-02-27 | A kind of spark plug and cylinder cover of natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720181064.5U CN206617241U (en) | 2017-02-27 | 2017-02-27 | A kind of spark plug and cylinder cover of natural gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206617241U true CN206617241U (en) | 2017-11-07 |
Family
ID=60231601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720181064.5U Active CN206617241U (en) | 2017-02-27 | 2017-02-27 | A kind of spark plug and cylinder cover of natural gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206617241U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578161A (en) * | 2019-01-03 | 2019-04-05 | 广西玉柴机器股份有限公司 | A kind of Ignition Natural Gas Engine spark plug mounting structure |
| CN112648099A (en) * | 2019-10-11 | 2021-04-13 | 广州汽车集团股份有限公司 | Cylinder head assembly and engine comprising same |
-
2017
- 2017-02-27 CN CN201720181064.5U patent/CN206617241U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578161A (en) * | 2019-01-03 | 2019-04-05 | 广西玉柴机器股份有限公司 | A kind of Ignition Natural Gas Engine spark plug mounting structure |
| CN112648099A (en) * | 2019-10-11 | 2021-04-13 | 广州汽车集团股份有限公司 | Cylinder head assembly and engine comprising same |
| CN112648099B (en) * | 2019-10-11 | 2022-07-22 | 广州汽车集团股份有限公司 | Cylinder head assembly and engine comprising same |
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