CN208707077U - A kind of spark plug - Google Patents
A kind of spark plug Download PDFInfo
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- CN208707077U CN208707077U CN201821574404.1U CN201821574404U CN208707077U CN 208707077 U CN208707077 U CN 208707077U CN 201821574404 U CN201821574404 U CN 201821574404U CN 208707077 U CN208707077 U CN 208707077U
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- insulator
- spark plug
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- firing tip
- shell
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Abstract
The utility model provides a kind of spark plug, belongs to technical field of automobile accessories.It solves the problems, such as the existing spark plug anti-carbon effect difference easily insulator easy fracture of arcing and spark plug.This spark plug, the central electrode that in insulator and one end is stretched out outside insulator, the lateral electrode for being arranged shell on insulator and being fixed on shell are inserted in including insulator, along the axial direction of insulator, there is the gap for being used to form electric spark between the lateral electrode and central electrode, the insulator is firing tip by one end of proximal electrode, the firing tip is equipped with several annular convex edges along the distribution of insulator axially spaced-apart, and the diameter of the annular convex edge is sequentially increased along by proximal electrode one end to far from lateral electrode one end.The firing tip surface product of this spark plug is larger, and the carbon distribution of attachment is not easy to form conductive path, and insulation effect is more preferable, and arcing is not likely to produce between central electrode and shell, and the service life is longer.
Description
Technical field
The utility model belongs to technical field of automobile accessories, is related to a kind of spark plug.
Background technique
Currently, automobile primary will be still using petrol engine as main power output, and spark plug is gasoline engine
One of important spare part of machine can light a fire after the completion of the gas mixture in cylinder compresses, to guarantee that gasoline is sent out
Motivation being capable of sustainedly and stably output power.
Spark plug is mainly made of wiring nut, insulator, wiring screw rod, central electrode, lateral electrode and shell, side electricity
Pole is welded on the shell, and ignition gap is formed between central electrode and lateral electrode, after central electrode is passed through high-voltage pulse current, in
Electric spark can be generated between heart electrode and lateral electrode with the oil gas in ignition engine cylinder, to achieve the purpose that igniting.By
It working at high temperature under high pressure for a long time in spark plug, working environment is extremely severe, and the insulator near central electrode can adhere to carbon distribution,
The creepage distance between central electrode and shell is caused to reduce, i.e., the insulation effect between central electrode and shell reduces, center
Arcing is formed between electrode and shell, and then causes not lighting a fire between central electrode and lateral electrode, to make engine can not
It works normally.
Currently, in order to solve this problem, it is common practice to extend the length of insulator protrusion shell end face come in extending
Creepage distance between heart electrode and shell.However, poor using the intensity of the insulator of the structure, with increasing in engine cylinder
Straightening spray technique using more and more extensive, in cylinder, abnormal combustion causes instantaneous pressure easily insulator is caused to be broken.
Summary of the invention
The purpose of this utility model is the presence of the above problem in view of the prior art, proposes a kind of spark plug, this is practical
It is novel the technical problem to be solved is that: the anti-arcing of spark plug is improved while how guaranteeing insulator Resisting fractre intensity
Energy.
The purpose of this utility model can be realized by the following technical scheme: a kind of spark plug, including insulator, edge insulation
The axial direction of body is inserted in the central electrode that in insulator and one end is stretched out outside insulator, is arranged shell on insulator and is connected
There is the gap for being used to form electric spark between the lateral electrode on shell, the lateral electrode and central electrode, which is characterized in that
The insulator is firing tip by one end of proximal electrode, and the firing tip is equipped with several rings along the distribution of insulator axially spaced-apart
The diameter of shape convex edge, the annular convex edge is sequentially increased along by proximal electrode one end to far from lateral electrode one end.
The central electrode of spark plug is inserted in insulator, and shell is sheathed on insulator outer wall, is made by insulator
Heart electrode and housing apart come.Multiple annular convex edges are arranged in the firing tip of insulator, have both improved the knot of insulator firing tip
Structure intensity keeps its not easy to break, and firing tip can be made to extend lateral electrode and center while not increasing its axial length
The electric spark generated between electrode increases the insulation effect of insulator, while annular along the creepage distance of firing tip outer surface
The setting of convex edge also increases the surface area of firing tip outer surface, and the diameter of annular convex edge is sequentially increased, and adheres to carbon distribution
The blocking effect for reducing annular convex edge when to firing tip outer surface, enable carbon distribution it is average be attached to each annular convex edge
On, keep the carbon distribution being attached on firing tip more dispersed, i.e., the carbon distribution quantity in unit area is less, and carbon distribution is not easy to form conductive path
Diameter generates arcing phenomenon, ensure that central electrode is pre- to keep the insulation effect of insulator more preferable between shell and central electrode
Normal sparking between tight lateral electrode.
In above-mentioned spark plug, the section of the annular convex edge firing tip axial direction is arc-shaped.In this way, annular convex edge surface
It is more smooth, so that it is not susceptible to arcing phenomenon.
In above-mentioned spark plug, the annular groove around insulator circumferential direction is formed between the adjacent annular convex edge,
The cross section of the annular groove is arc-shaped.By blocking for annular convex edge, carbon distribution is not easy to be attached on the inner wall of annular groove,
Make carbon distribution that can not form the complete conductive access axially extending along firing tip, insulation effect is more preferable.
There is gap in above-mentioned spark plug, between the inner wall of the shell and the side wall of firing tip and form annular sky
Chamber, the annular convex edge are respectively positioned in toroidal cavity.In this way, carbon distribution is not easily accessible toroidal cavity and is attached in annular convex edge,
The insulation effect of firing tip is more preferable.
In above-mentioned spark plug, the diameter of the firing tip along by proximal electrode one end to separate lateral electrode one end gradually
Increase.In this way, the distance of the firing tip side wall shrinking away from theshell body closer apart from lateral electrode is remoter, make the effect that insulate between firing tip and side wall
Fruit is more preferable, is not likely to produce arcing phenomenon.
In above-mentioned spark plug, the insulator stretches out outside shell far from one end of firing tip and is inserted with wiring spiral shell
Bar, the insulator have several full skirts along the distribution of its axially spaced-apart far from one end of firing tip.The setting of full skirt makes wiring
Creepage distance between screw rod and shell increases, and the insulation effect of insulator is more preferable.
Compared with prior art, the utility model has the advantage that
1, multiple annular convex edges are set on this plug ignition end, keep the structural strength of firing tip more preferable, it is not easy to break, and
And creepage distance is extended, while annular convex edge is sequentially increased so far, so that the carbon distribution is dispersedly attached to each annular convex edge
On, make carbon distribution be not easy to form conductive path, anti-arcing performance is more preferable, and extends the service life of spark plug.
2, the cross section of the groove formed between annular convex edge and annular convex edge is arc-shaped, makes the surface more light of firing tip
It is sliding, arcing is not likely to produce between insulator and shell.
Detailed description of the invention
Fig. 1 is the front view of spark plug；
Fig. 2 is the structural schematic diagram of spark plug end；
Fig. 3 is the perspective view of insulator.
In figure, 1, shell；2, insulator；2a, firing tip；21, annular convex edge；22, annular groove；23, full skirt；24, pacify
Fill hole；3, central electrode；4, lateral electrode；5, wiring screw rod；6, toroidal cavity.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
A kind of spark plug, including insulator 2, central electrode 3, shell 1 and lateral electrode 4.This insulator 2 uses ceramic insulation
Material is made, and insulator 2 is substantially in strip column, and insulator 2 is provided with the mounting hole 24 that front and back penetrates through, central electrode along its axial direction
3 are inserted in mounting hole 24 and one end is stretched out outside mounting hole 24, the other end of mounting hole 24 be inserted with for and the pulse power connect
The wiring screw rod 5 connect, wiring screw rod 5 are connect with central electrode 3, and shell 1 is made and is substantially cylindrical in shape using metal, shell 1
Outer surface has the external screw thread for being threadedly coupled with engine cylinder body, and shell 1 is sheathed on insulator 2 and consolidates with insulator 2
Even, lateral electrode 4 and shell 1 weld, and have the gap for being used to form electric spark between the front end of lateral electrode 4 and central electrode 3.
Specifically, as shown in Figure 2 and Figure 3, insulator 2 is firing tip 2a, the side of firing tip 2a by one end of proximal electrode 4
There is gap between wall and the inner wall of shell 1, make to form toroidal cavity 6, point between the side wall of firing tip 2a and the inner wall of shell 1
With several annular convex edges 21 along the distribution of its axially spaced-apart on the side wall of fire end 2a, these annular convex edges 21 are respectively positioned on annular empty
In chamber 6, and there is gap between annular convex edge 21 and the inner wall of shell 1.In the present embodiment, annular convex edge 21 is three, this three
The diameter of a annular convex edge 21 is sequentially increased along by 4 one end of proximal electrode to the direction far from 4 one end of lateral electrode, works as central electrode
When 3 generations laterally climb electricity, creepage distance is effectively extended, the surface area of firing tip 2a is increased, carbon distribution can be respectively attached to
In each annular convex edge 21, to reduce the carbon distribution quantity in unit area, the conductive effect of carbon distribution is reduced, to improve insulation effect
Fruit prolongs the service life.
Further, in the present embodiment, each annular convex edge 21 ring arc-shaped, adjacent along the section of firing tip 2a axial direction
The annular groove 22 around firing tip 2a circumferential direction is formed between shape convex edge 21, the cross section of annular groove 22 is also arc-shaped, annular
The outer surface of convex edge 21 and the cell wall of annular groove 22 smoothly transit, and carbon distribution is not easy to adhere in annular groove 22, make carbon distribution not
It is formed easily on firing tip 2a along its axial conductive path, improves insulation effect.
Further, this firing tip 2a is tapered, and the diameter of firing tip 2a is along by 4 one end of proximal electrode to separate lateral electrode
4 one end are gradually increased, i.e. position shrinking away from theshell body 1 firing tip 2a close from central electrode 3 is farther, to reduce central electrode 3 and shell
The possibility of the generation arcing of body 1.Firing tip 2a towards the end face of lateral electrode 4 be plane.
Further, the one end of insulator 2 far from shell 1 also has several full skirts along the distribution of 2 axially spaced-apart of insulator
23, full skirt 23 improves the insulation effect between wiring screw rod 5 and shell 1 between wiring screw rod 5 and shell 1.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although shell 1, insulator 2, firing tip 2a, annular convex edge 21, annular groove 22, full skirt is used more herein
23, the terms such as central electrode 3, lateral electrode 4, wiring screw rod 5, but it does not exclude the possibility of using other terms.Use these
Term is used for the purpose of being more convenient to describe and explain the essence of the utility model；It is construed as any additional limit
System is all contrary to the spirit of the present invention.
Claims (6)
1. a kind of spark plug, is inserted in insulator (2) including insulator (2), along the axial direction of insulator (2) and one end is stretched out absolutely
Central electrode (3), the shell (1) being set on insulator (2) and the lateral electrode being fixed on shell (1) of edge body (2) outside
(4), there is the gap for being used to form electric spark, which is characterized in that described exhausted between the lateral electrode (4) and central electrode (3)
Edge body (2) is firing tip (2a) by the one end of proximal electrode (4), and the firing tip (2a) is equipped with several axial along insulator (2)
The annular convex edge (21) being spaced apart, the diameter of each annular convex edge (21) is along by proximal electrode (4) one end to separate side electricity
Pole (4) one end is sequentially increased.
2. spark plug according to claim 1, which is characterized in that the annular convex edge (21) is along firing tip (2a) axial direction
Section is arc-shaped.
3. spark plug according to claim 1 or 2, which is characterized in that formed between the adjacent annular convex edge (21)
Around the annular groove (22) of insulator (2) circumferential direction, the cross section of the annular groove (22) is arc-shaped.
4. spark plug according to claim 3, which is characterized in that the inner wall of the shell (1) and the side of firing tip (2a)
Toroidal cavity (6) are formed between wall, the annular convex edge (21) is respectively positioned in toroidal cavity (6).
5. spark plug according to claim 4, which is characterized in that the diameter of the firing tip (2a) is along by proximal electrode
(4) one end is gradually increased to far from lateral electrode (4) one end.
6. spark plug according to claim 5, which is characterized in that the one end of the insulator (2) far from firing tip (2a)
It stretches out shell (1) outside and is inserted with the wiring screw rod (5) connecting with central electrode (3), the insulator (2) is far from firing tip
The one end of (2a) has several full skirts (23) along the distribution of its axially spaced-apart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821574404.1U CN208707077U (en) | 2018-09-26 | 2018-09-26 | A kind of spark plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821574404.1U CN208707077U (en) | 2018-09-26 | 2018-09-26 | A kind of spark plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208707077U true CN208707077U (en) | 2019-04-05 |
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ID=65947781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821574404.1U Active CN208707077U (en) | 2018-09-26 | 2018-09-26 | A kind of spark plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208707077U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110311298A (en) * | 2019-08-07 | 2019-10-08 | 宋天顺 | Spark plug |
| CN112736649A (en) * | 2020-12-18 | 2021-04-30 | 陕西航空电气有限责任公司 | Ignition electric nozzle with high-voltage insulator |
-
2018
- 2018-09-26 CN CN201821574404.1U patent/CN208707077U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110311298A (en) * | 2019-08-07 | 2019-10-08 | 宋天顺 | Spark plug |
| CN112736649A (en) * | 2020-12-18 | 2021-04-30 | 陕西航空电气有限责任公司 | Ignition electric nozzle with high-voltage insulator |
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