A method for preventing the oxidation of the terminal part of the spark plug wiring screw and the spark plug
A spark plug and wire screw technology, applied in spark plugs, spark plug manufacturing, electrical components, etc., can solve the problems of easy oxidation and large contact resistance at the bottom of the cup, and achieve the effect of eliminating pollutant emissions
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Embodiment 1
[0035] figure 1 It is a schematic diagram of a spark plug structure, by attaching figure 1It can be seen that a spark plug of the present invention has an insulator part 2, and a shell part 3 partly combined on the outer periphery of the insulator part 2. The insulator part 2 is composed of a center electrode 4, a sealing body 5, and a wiring screw 1. The shell The body part 2 is composed of a housing 6 and a side electrode 7, and a gap for discharge is formed between the center electrode 4 and the side electrode 7; the terminal part 1A of the connecting screw 1 leaking out of the rear end of the insulator and the shaft inserted into the insulator The rod-shaped portion 1B of the hole is formed, and the terminal portion 1A of the terminal screw 1 is a cup-shaped structure; there is a concave blind hole 8 extending to the rod-shaped portion in the center of the terminal portion 1A, and the volume of the terminal portion is V, and the terminal portion The volume is V≤200mm 3 ;...
Embodiment 2
[0057] 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, and it is a kind of spark plug, such as the attached Figure 6 As shown, it has an insulator part and a casing part partially combined on the outer periphery of the insulator part. The insulator part is composed of a central electrode, a sealing body, and a wiring screw. The casing part is composed of a casing and a side electrode. The center The electrodes and the side electrodes form a gap for discharge; the connecting screw is composed of a terminal part leaking from the rear end of the insulator and a rod-shaped part inserted into the axial hole of the insulator, and the terminal part of the connecting screw is a common terminal structure; The terminal part and the rod-shaped part of the terminal screw are made of a material that is difficult to be oxidized at a high temperature, and the terminal part is a terminal scr...
Embodiment 3
[0063]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. It is a kind of spark plug, which has an insulator part, and a shell part partially combined on the outer periphery of the insulator part. The insulator part It is composed of a central electrode, a sealing body, and a wiring screw. The shell part is composed of a shell and a side electrode, and the center electrode and the side electrode form a gap for discharge; part and the rod-shaped part inserted into the shaft hole of the insulator, and the terminal part of the terminal screw is a cup-shaped structure; it is characterized in that: the terminal part and the rod-shaped part of the terminal screw are made of materials that are difficult to be oxidized at high temperatures The integral structure of the terminal screw.
[0064] The connecting screw is made of alloy steel mainly composed of Fe and Cr, and the oxidation resi...
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