Spark plug with cross-shaped slot on side electrode

Abstract

The utility model discloses a spark plug with a cross-shaped slotted side electrode, which comprises a shell, an insulator inserted on the shell, a wiring screw rod and a central electrode which are arranged in the insulator, and the side electrode formed on the shell, and a central power connection part and a peripheral power connection part are formed on the side electrode; the side electrode is provided with a cross recess, and the cross recess extends along the radial direction of the central power connection part and is communicated with the central power connection part and the peripheral power connection parts.

Description

Technical Field

[0001] The utility model relates to the technical field of spark plugs, in particular to a spark plug with a cross groove on a side electrode. Background Art

[0002] A spark plug, commonly known as a spark plug, discharges pulsed high-voltage electricity from a high-voltage wire (spark plug wire) to break through the air between the two electrodes, generating an electric spark that ignites the mixture in the cylinder. Main types include: standard spark plugs, protruding-blade spark plugs, electrode-type spark plugs, seat-type spark plugs, pole-type spark plugs, and surface-sparking spark plugs. They primarily consist of a terminal nut, insulator, terminal screw, center electrode, side electrode, and outer shell, with the side electrode welded to the outer shell.

[0003] However, during the discharge and ignition process of the existing spark plug, the flame needs to move around the side electrodes during the ejection process, thereby increasing the movement path of the flame and reducing the ignition efficiency. Utility Model Content

[0004] In order to solve the technical problems existing in the background technology, the utility model proposes a spark plug with a cross groove on the side electrode.

[0005] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0006] A spark plug with a cross-grooved side electrode comprises a housing, an insulator inserted into the housing, a terminal screw and a center electrode arranged in the insulator, and side electrodes constituting the housing, wherein the side electrodes are provided with a center electrical connection portion and a peripheral electrical connection portion.

[0007] A cross groove is formed on the side electrode, and the cross groove extends radially along the central power connection portion and connects the central power connection portion and the peripheral power connection portion.

[0008] Preferably, the central electrode comprises a central discharge portion and peripheral discharge portions, with the central discharge portion being positioned opposite the central power connection portion, and the peripheral discharge portions being positioned opposite the peripheral power connection portions. Through these improvements, the central and peripheral discharge portions, as well as the central and central power connection portions, cooperate to achieve multi-point discharge, significantly increasing ignition efficiency.

[0009] Preferably, a first ignition arc surface is formed on the central power connection portion. With the above improvements, when the central power connection portion cooperates with the central discharge portion and the peripheral discharge portion to perform discharge ignition, the flame can escape from the cross groove along the first ignition arc surface, significantly reducing the flame conduction path, thereby improving the internal ignition efficiency.

[0010] Preferably, the side electrodes are provided with flame outlet grooves, the cross grooves connecting one side of the peripheral power connection portion, and the flame outlet grooves being provided on the other side of the peripheral power connection portion. With the above improvements, when the central discharge portion or the peripheral discharge portion cooperates with the peripheral power connection portion to discharge, the flame can escape from both the cross grooves and the flame outlet grooves, significantly shortening the flame travel distance, thereby significantly improving ignition efficiency and ensuring more complete combustion.

[0011] Preferably, a second fire guide arc surface is provided on the fire outlet groove.

[0012] Preferably, a third ignition arc surface is provided on the peripheral power connection portion. Through the above improvement, when the peripheral power connection portion cooperates with the central discharge portion or the peripheral discharge portion to discharge, the flame can escape along the third ignition arc surface, thereby shortening the flame travel distance, greatly improving the ignition efficiency, and making the combustion more complete.

[0013] Preferably, the central power connection portion is formed into an arc hemispherical surface. Through the above improvement, the arc hemispherical surface is used to increase the receiving area of ​​the central power connection portion for ionization sparks, which can reduce the carbon deposit coverage on the central discharge portion within the same time, thereby reducing the replacement frequency of the spark plug.

[0014] Preferably, the central discharge portion is threadedly connected to the central electrode, and the central discharge portion is raised and lowered to adjust the discharge distance between the central discharge portion and the side electrode. With the above improvement, when the spark plug is used for a long time, the central discharge portion will wear, resulting in an increase in the discharge distance between the central discharge portion and the side electrode, causing the spark to weaken and further affecting the normal operation of the engine. The central discharge portion can be rotated to adjust the discharge distance between the central discharge portion and the side electrode, thereby improving the ignition effect and ensuring the normal operation of the engine.

[0015] Preferably, a clamping groove for clamping is formed on the peripheral side of the central discharge part. Through the above improvement, the central discharge part can be rotated by using the clamping groove, thereby improving the convenience of adjusting the central discharge part.

[0016] Preferably, a fixing nut is provided on the outer periphery of the housing, and a retaining sleeve is provided on the housing for secure engagement. The outer periphery of the retaining sleeve forms a clamping protrusion that engages with the clamping groove. With these improvements, the retaining sleeve not only secures the fixing nut, ensuring stable installation of the spark plug, but also allows the central discharge portion to be adjusted by removing the retaining sleeve, improving ease of adjustment.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] By opening a cross groove on the side electrode and connecting the center power connection part with the peripheral power connection part through the cross groove, when the spark plug is igniting, the center electrode, the center power connection part and the peripheral power connection part discharge and ignite, and the flame can directly burst upward through the cross groove without bypassing the entire outer periphery of the side electrode to enter the combustion chamber, thereby greatly shortening the flame conduction path, thereby improving the ignition efficiency and making the combustion in the combustion chamber more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the housing of the present utility model;

[0021] Figure 3 For the utility model Figure 2 A partial enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic structural diagram of the central electrode of the present invention;

[0023] Figure 5 This is a structural diagram of the fixing sleeve and the fixing nut of the utility model;

[0024] Figure 6 This is a structural diagram of the fixing sleeve of the utility model;

[0025] In the figure: 1, housing; 2, insulator; 3, terminal screw; 4, center electrode; 5, side electrode; 101, center electrical connection portion; 102, peripheral electrical connection portion; 103, cross groove; 104, first ignition arc surface; 105, spark outlet groove; 106, second ignition arc surface; 107, third ignition arc surface; 108, arc hemispherical surface; 201, center discharge portion; 202, peripheral discharge portion; 203, clamping groove; 204, fixing nut; 205, fixing sleeve; 206, clamping protrusion; 207, abutting protrusion; DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] It should be understood that although terms such as upper, middle, lower, top, end, etc. appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish elements from each other for ease of understanding, and are not used to define any direction or order limitation.

[0028] like Figure 1-6 As shown, a spark plug with a side electrode cross slot includes a housing 1, an insulator 2 inserted into the housing 1, a terminal screw 3 and a center electrode 4 arranged in the insulator 2, and a side electrode 5 constituting the housing 1, wherein the side electrode 5 has a center electrical connection portion 101 and a peripheral side electrical connection portion 102;

[0029] Specifically, a cross groove 103 is formed on the side electrode 5 , and the cross groove 103 extends radially along the central power connection portion 101 and connects the central power connection portion 101 and the peripheral power connection portion 102 .

[0030] By providing a cross groove 103 on the side electrode 5, the cross groove 103 is used to connect the central power connection part 101 with the peripheral power connection part 102. When the spark plug is ignited, the central electrode 4 discharges and ignites with the central power connection part 101 and the peripheral power connection part 102. The flame can directly burst upward through the cross groove 103 without having to bypass the outer contour of the side electrode 5 and then enter the combustion chamber, thereby greatly shortening the flame conduction path, improving the ignition efficiency, and making the combustion in the combustion chamber more complete.

[0031] like Figures 1 to 4 As shown, further explanation of the discharge coordination between the central electrode 4 and the peripheral electrode 5 in this embodiment is provided, wherein a central discharge portion 201 and a peripheral discharge portion 202 are formed on the central electrode 4, and the central discharge portion 201 is arranged opposite to the central power connection portion 101, and the peripheral discharge portion 202 is arranged opposite to the peripheral power connection portion 102.

[0032] During use of the spark plug, the central discharge portion 201 and the peripheral discharge portion 202, as well as the central discharge portion 201 and the central power connection portion 101, cooperate with each other. The central discharge portion 201 can respectively cooperate with the central power connection portion 101 and the peripheral power connection portion 102 to discharge, and the peripheral discharge portion 202 can also cooperate with the central power connection portion 101 and the peripheral power connection portion 102 to discharge, thereby performing multi-point discharge and greatly improving ignition efficiency.

[0033] like Figures 1 to 4As shown, a further explanation of the flame guidance implementation method in this embodiment is provided, wherein a first ignition arc surface 104 is formed on the central power connection portion 101. When the central power connection portion 101 cooperates with the central discharge portion 201 or the peripheral discharge portion 202 to produce discharge ignition, the flame can directly escape from the cross groove 103 along the first ignition arc surface 104 and enter the combustion chamber. Compared with traditional spark plugs, the flame needs to bypass the entire side electrode 5 before entering the combustion chamber, which greatly reduces the flame conduction path and improves the internal ignition efficiency.

[0034] Furthermore, a fire outlet groove 105 is provided on the side electrode 5 , the cross groove 103 is connected to one side of the peripheral side power connection part 102 , and the fire outlet groove 105 is provided on the other side of the peripheral side power connection part 102 , and a second fire guide arc surface 106 is provided on the fire outlet groove 105 .

[0035] When the central discharge portion 201 or the peripheral discharge portion 202 cooperates with the peripheral power connection portion 102 for ignition, the flame can burst out from the cross groove 103 and the fire outlet groove 105 on both sides of the peripheral power connection portion 102, greatly shortening the flame movement distance, thereby greatly improving the ignition efficiency and making the interior of the combustion chamber more sufficient.

[0036] In addition, a third ignition arc surface 107 is provided on the peripheral power connection part 102. In the flame conduction path, the flame can burst out along the third ignition arc surface 107. The third ignition arc surface 107 guides the flame so that the flame is discharged from the fire outlet groove 105 or directly along the side of the peripheral power connection part 102, thereby shortening the flame movement distance and improving the ignition efficiency.

[0037] Preferably, the central power connection portion 101 is formed with an arc hemispherical surface 108. The arc hemispherical surface 108 increases the receiving area of ​​the central power connection portion 101 for the ionization spark, which can reduce the carbon deposit coverage on the central discharge portion 201 within the same time, thereby reducing the replacement frequency of the spark plug.

[0038] like Figures 5 and 6 As shown, in some other embodiments, the central discharge portion 201 is threadedly connected to the central electrode 4, and the central discharge portion 201 can be rotated to be raised or lowered, thereby adjusting the discharge distance between the central discharge portion 201 and the side electrode 5.

[0039] During daily use of the spark plug, when the spark plug is used for a long time, the central discharge part 201 or the side electrode 5 will be worn, which will cause the discharge distance between the central electrode 4 and the side electrode 5 to increase, causing the spark to weaken, and thus affecting the normal operation of the engine. The central discharge part 201 can be rotated to adjust the discharge distance between it and the side electrode 5, thereby improving the ignition effect and ensuring the normal operation of the engine.

[0040] In addition, a clamping groove 203 for clamping is formed on the circumference of the central discharge portion 201 . The central discharge portion 201 can be rotated by utilizing the clamping groove 203 , thereby improving the convenience of adjusting the central discharge portion 201 .

[0041] Specifically, a fixing nut 204 is provided on the outer periphery of the shell 1, and a fixing sleeve 205 is provided on the shell 1 for clamping and fixing. The outer periphery of the fixing sleeve 205 constitutes a clamping protrusion 206 for clamping the clamping groove 203. The fixing sleeve 205 can not only fix the fixing nut 204 to ensure the stability of the spark plug installation, but also the fixing sleeve 205 can be removed to adjust the central discharge part 201, thereby improving the convenience of adjusting the central discharge part 201.

[0042] Preferably, an abutting protrusion 207 is formed on the inner wall of the fixing sleeve 205 to improve the stability of the matching between the fixing sleeve 205 and the insulator 2, thereby ensuring the stability of the fixing nut 204.

[0043] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A spark plug with a side electrode cross slot, comprising a housing (1), an insulator (2) inserted into the housing (1), a terminal screw (3) and a center electrode (4) arranged in the insulator (2), and a side electrode (5) constituting the housing (1), characterized in that: The side electrode (5) is formed with a central power connection portion (101) and a peripheral power connection portion (102); A cross groove (103) is provided on the side electrode (5), and the cross groove (103) extends radially along the central power connection portion (101) and connects the central power connection portion (101) and the peripheral power connection portion (102).

2. A spark plug with a side electrode cross groove according to claim 1, characterized in that: The central electrode (4) is provided with a central discharge portion (201) and a peripheral discharge portion (202), wherein the central discharge portion (201) is arranged opposite to the central power connection portion (101), and the peripheral discharge portion (202) is arranged opposite to the peripheral power connection portion (102).

3. The spark plug with a side electrode cross groove according to claim 1, characterized in that: A first ignition arc surface (104) is formed on the central power connection portion (101).

4. The spark plug with a side electrode cross groove according to claim 1, characterized in that: The side electrode (5) is provided with a fire outlet groove (105), the cross groove (103) is connected to one side of the peripheral side power connection part (102), and the fire outlet groove (105) is provided on the other side of the peripheral side power connection part (102).

5. The spark plug with a side electrode cross groove according to claim 4, characterized in that: A second fire-guiding arc surface (106) is provided on the fire outlet groove (105).

6. The spark plug with a side electrode cross groove according to claim 1, characterized in that: A third ignition arc surface (107) is provided on the peripheral side electrical connection portion (102).

7. The spark plug with a side electrode cross groove according to claim 2, characterized in that: The central power connection portion (101) forms a circular arc hemispherical surface (108), and the central discharge portion (201) is at the same distance from any point on the circular arc hemispherical surface (108).

8. The spark plug with a side electrode cross groove according to claim 2, characterized in that: The central discharge portion (201) is threadedly connected to the central electrode (4), and the central discharge portion (201) is raised and lowered to adjust the discharge distance between the central discharge portion and the side electrode (5).

9. The spark plug with a side electrode cross groove according to claim 2, characterized in that: A clamping groove (203) for clamping is formed on the peripheral side of the central discharge portion (201).

10. The spark plug with a side electrode cross groove according to claim 9, characterized in that: A fixing nut (204) is provided on the outer periphery of the housing (1), and a clamping and fixing fixing sleeve (205) is sleeved on the housing (1), and the outer periphery of the fixing sleeve (205) forms a clamping protrusion (206) that clamps the clamping groove (203).

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