Spark plug and manufacturing method thereof

A manufacturing method and a technology of spark plugs, which are applied in the manufacture of spark plugs, spark plugs, electrical components, etc., can solve the problems of low processing pass rate, reduced strength of spark plugs, and difficult process of wiring screws, etc., to solve the problem of forced growth, shortening the length of rods, The effect of increasing strength

Active Publication Date: 2020-07-24
ZHUZHOU TORCH SPARK PLUG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention is proposed in view of the above-mentioned existing problems, and its purpose is to provide a spark plug in which the distance between the terminal portion of the wire screw and the housing is extended without lengthening the rod-shaped portion of the wire rod and its manufacturing method; the spark plug The manufacturing method th

Method used

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  • Spark plug and manufacturing method thereof
  • Spark plug and manufacturing method thereof
  • Spark plug and manufacturing method thereof

Examples

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Example Embodiment

[0033] Example one

[0034] Researchers of the present invention found that due to the miniaturization of the engine and strict emission regulations, technologies such as turbocharging and in-cylinder direct injection were applied to the engine, which caused the spark plug ignition demand voltage to increase from below 20kv to 40kv. Below, with the increase of the ignition demand voltage, the phenomenon of current leakage from the terminal part of the spark plug wire screw to the casing has occurred. Therefore, in recent years, spark plugs with a longer distance between the terminal part of the spark plug wire screw and the casing have appeared. This structure will inevitably cause wiring The rod-shaped part of the screw has a longer length, so it is prone to bending.

[0035] Therefore, the present invention proposes a cup-type terminal spark plug, which includes an insulator 2, a terminal screw 1, a center electrode 3, a side electrode 5, and a housing 4; wherein the insulator 2 ...

Example Embodiment

[0064] Example two

[0065] The basic principle of the second embodiment is the same as that of the first embodiment, except that the materials and structures used are different. Figure 4 Shown is a cup-type terminal spark plug, including an insulator 202, a wire screw 201, a center electrode 203, a side electrode 205, and a housing 204; wherein the insulator 202 has a stepped hole along the axial direction; at least a part of the center electrode 203 Inserted into the front end of the stepped hole; the terminal screw 210 has a terminal portion 201A and a rod-shaped portion 201B, and the rod-shaped portion 201B is inserted into the stepped hole of the insulator, the terminal portion 201B leaks out at the rear end of the insulator, and the terminal portion 201B has a cup-shaped feature ; In order to increase the creepage distance, the structure of an extended insulator is adopted, that is, the distance between the terminal part 201B of the terminal screw 201 and the housing 204 is...

Example Embodiment

[0071] Example three

[0072] The basic principle of the third embodiment is the same as that of the first embodiment, except that the materials and structures used are different. Figure 5 As shown, it is an ordinary terminal spark plug, including an insulator 302, a wire screw 301, a center electrode 303, a side electrode 305, and a housing 304; wherein the insulator 302 has a stepped hole along the axis; at least a part of the center electrode 303 is inserted into The front end side of the stepped hole; the terminal screw 301 has a terminal portion 301A and a rod-shaped portion 301B, and the rod-shaped portion 301B is inserted into the stepped hole of the insulator 302, the terminal portion 301A leaks at the rear end of the insulator 302, and the terminal portion 301A is an ordinary cylindrical terminal The height of the terminal portion 301A is within 5mm; in order to increase the creepage distance, an extended insulator structure is adopted, that is, the distance between the ...

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Abstract

The invention discloses a spark plug and a manufacturing method thereof. The spark plug comprises an insulator, a wiring screw, a central electrode, side electrodes and a shell. The insulator is provided with a stepped hole along the axis direction; at least one part of the central electrode is inserted into the front end side of the stepped hole; the wiring screw is provided with a terminal partand a rod-shaped part, and the rod-shaped part is inserted into the stepped hole of the insulator; the length of the rod-shaped part of the wiring screw extending into the insulator along the axis direction is less than 35mm, and a rod-shaped connecting piece is arranged between the front end of the rod-shaped part and the central electrode; the length of the rod-shaped part of the wiring screw isreduced by increasing the rod-shaped connecting piece, and the connection between the wiring screw and the central electrode is ensured. According to the invention, the rod-shaped part of the screw is limited below 35mm, and the rod-shaped connecting piece extends the length of the rod-shaped part of the wiring screw, so that the length of the rod-shaped part of the wiring screw is effectively shortened; and the process difficulty of the wiring screw in production caused by forced growth of the rod-shaped part due to the fact that the distance between the terminal part and the shell is prolonged can be solved.

Description

technical field [0001] The present invention relates to a spark plug and a manufacturing method thereof, in particular to a spark plug and a manufacturing method thereof; the spark plug and the manufacturing method thereof can solve the problem that the rod-shaped part is forced due to the extension of the distance between the terminal part and the housing. Due to the growth, the production process of the terminal screw is difficult, and the processing pass rate is low; and the insulator parts are bent during the production process, resulting in the reduction of the strength of the spark plug; it belongs to the technical field of spark plug production. Background technique [0002] Traditionally, spark plugs are used to ignite the air-fuel mixture in internal combustion engines. For example, a spark plug usually includes: an insulator part, which usually consists of an insulator with a shaft hole extending in the axial direction, a center electrode arranged on the front end ...

Claims

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Application Information

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IPC IPC(8): H01T13/04H01T21/02
CPCH01T13/04H01T21/02
Inventor 杨辉睦李耀
Owner ZHUZHOU TORCH SPARK PLUG CO LTD
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