Spark plug

Abstract

The utility model discloses a spark plug, which comprises a core component, a connecting component and a fixing component, the core component comprises an insulator and a metal shell, and the metal shell sleeves the insulator and is used for protecting the insulator; the connecting part comprises a pressing connecting body, the pressing connecting body is arranged on the insulator in a sleeving mode and connected with the metal shell, a first inner inclined face is arranged in one end of the pressing connecting body, and the first inner inclined face abuts against the insulator; and the fixing part is positioned at one end of the insulator and is positioned above the pressing connector. According to the spark plug provided by the utility model, the pressing connecting body is added in the structure, the insulator can be limited through the inner inclined surface of the pressing connecting body, the spark plug is connected with the metal shell through the thread at the end where the first inner inclined surface is located, and a spring clip fixed connection is replaced by a thread pair connection, so that the connection strength is improved, and falling is avoided.

Description

Technical Field

[0001] The utility model relates to the field of natural gas flame treatment systems, and particularly relates to a spark plug for high-voltage ignition. Background Art

[0002] The head of the existing spark plug is generally fixed to the burner body through a thread, and the tail is generally connected to an insulator with an elastic clip through a terminal. In most application scenarios, the cooperation between the terminal and the elastic clip can provide sufficient connection strength. However, for some application scenarios, such as the ignition device installed on a six-axis robot, due to the movement of the robot, the high-voltage wire and the insulator will be dragged. Since the elastic clip cannot provide sufficient fastening force, the insulator and the spark plug are easily detached, resulting in the burner being unable to ignite normally. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a spark plug with a simple structure and enhanced connection with the insulator to solve the problem of the detachment of the spark plug terminal and the insulator.

[0004] To solve the above technical problems, the utility model provides a spark plug, which includes a core component, a connection component and a fixing component;

[0005] The core component includes an insulator and a metal shell. The metal shell is sleeved on the insulator to protect the insulator;

[0006] The connection component includes a pressing connection body. The pressing connection body is sleeved on the insulator, connected to the metal shell, and the inside of one end of the pressing connection body has a first inner inclined surface, and the first inner inclined surface abuts against the insulator;

[0007] The fixing component is located at one end of the insulator and above the pressing connection body.

[0008] Further, the insulator has a middle convex part, and the first inner inclined surface abuts against one end of the middle convex part.

[0009] Further, the inside of the metal shell has a second inner inclined surface, and the second inner inclined surface abuts against the other end of the middle convex part.

[0010] Further, the pressing connection body and the metal shell are connected by a thread pair.

[0011] Further, the core component further includes a center electrode; one end of the center electrode is provided with a cylindrical threaded part, and a positioning pin is arranged below the threaded part.

[0012] Further, the insulator is sleeved on the central electrode, and one end of the insulator is close to the threaded portion, and the other end is located on the positioning pin.

[0013] Further, the fixing member includes a lock washer; the lock washer is installed on the threaded portion and is located above the insulator.

[0014] Further, the fixing member further includes a thin hexagon nut; the thin hexagon nut is screwed onto the threaded portion and is located above the lock washer.

[0015] Compared with the prior art, the utility model has at least the following beneficial effects:

[0016] A compression connection body is added to the spark plug. The insulator is limited and fixed through the inner inclined surface inside the compression connection body, and is connected to the metal shell through the thread on the outer side of the end where the first inner inclined surface is located. The spring clip fixed connection is replaced by a thread pair connection, which improves the connection strength and avoids the detachment of the insulator from the spark plug. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of a spark plug in an embodiment of the utility model;

[0018] Figure 2 is an exploded view of the structure of a spark plug in an embodiment of the utility model;

[0019] Figure 3 is a schematic diagram of a compression connection member of a spark plug in an embodiment of the utility model;

[0020] Figure 4 is a schematic diagram of a lock washer of a spark plug in an embodiment of the utility model;

[0021] Figure 5 is a partial connection relationship sectional view of a spark plug in an embodiment of the utility model;

[0022] Figure 6 is a partial connection relationship sectional view of a spark plug in an embodiment of the utility model;

[0023] Figure 7 is a partial connection relationship sectional view of a spark plug in an embodiment of the utility model;

[0024] Figure 8 is a partial connection relationship sectional view of a spark plug in an embodiment of the utility model.

[0025] Reference numerals in the drawings: 1, central electrode; 2, insulator; 3, metal shell; 4, compression connection body; 5, lock washer; 6, thin hexagon nut; 7, first inner inclined surface; 8, threaded portion; 9, positioning pin. Detailed Implementation Manner

[0026] The following will describe a spark plug of the present utility model in more detail in conjunction with the schematic diagrams, in which the preferred embodiments of the present utility model are shown. It should be understood that those skilled in the art can modify the present utility model described herein while still achieving the advantageous effects of the present utility model. Therefore, the following description should be understood as broad knowledge for those skilled in the art and not as a limitation on the present utility model.

[0027] In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the accompanying drawings. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are all in a very simplified form and use non-precise scales, only for the purpose of facilitating and clearly assisting in explaining the purpose of the embodiments of the present utility model.

[0028] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present utility model.

[0029] As Figures 1 to 8 shown, an embodiment of the present utility model provides a spark plug, which includes a core component, a connecting component, and a metal shell;

[0030] The core component includes an insulator 2 and a metal shell 3; the metal shell 3 is sleeved on the insulator 2 for protecting the insulator 2;

[0031] The connecting component includes a compression connecting body 4. The compression connecting body 4 is sleeved on the insulator 2 and connected to the metal shell 3. And inside one end of the compression connecting body 4, there is a first inner inclined surface 7, and the first inner inclined surface 7 abuts against the insulator 2;

[0032] The fixing component is located at one end of the insulator 2 and above the compression connecting body 4.

[0033] In this embodiment, as Figures 5 - 8As shown, the insulator 2 has a middle convex portion, and one end of the first inner inclined surface 7 abuts against the middle convex portion; the inside of the metal housing 3 has a second inner inclined surface, and the other end of the second inner inclined surface abuts against the middle convex portion. The metal housing 3, the compression connection body 4 and the insulator 2 are connected in this way, which can make the connection tighter and more firm.

[0034] In a preferred embodiment, the compression connection body 4 and the metal housing 3 are connected by a thread pair, which can improve the connection strength and prevent the insulator 2 from falling off.

[0035] In this embodiment, the core component further includes a center electrode 1. One end of the center electrode 1 is provided with a cylindrical threaded portion 8 for connecting and fixing other components. A positioning pin 9 is provided below the threaded portion 8; the insulator 2 is sleeved on the center electrode 1, and the thick end of the insulator 2 is close to the threaded portion 8, and the other end is located on the positioning pin 9. The center electrode 1 is the conductive part of the spark plug for transmitting current; through the positioning pin 9, the insulator 2 can be accurately fixed on the center electrode 1 to ensure electrical safety and prevent short circuits.

[0036] In a specific implementation, the fixing component includes a lock washer 5, and the lock washer 5 is installed on the threaded portion 8 and is located above the insulator 2. The lock washer 5 is used to increase the fastening force of the connection and prevent the nut from loosening.

[0037] In addition, the fixing component further includes a thin hexagon nut 6; the thin hexagon nut 6 is screwed onto the threaded portion 8 and is located above the lock washer 5. The thin hexagon nut 6 and the lock washer 5 are used in cooperation to ensure the stability of the connection.

[0038] In summary, for the spark plug proposed in this embodiment, the compression connection body 4 is added to the structure. The inner inclined surface of the compression connection body 4 can be used to limit and fix the insulator 2, and the insulator 2 is connected to the metal housing 3 through the thread at the end where the first inner inclined surface is located. The spring clip fixed connection is replaced by a thread pair connection to improve the connection strength and prevent the insulator from falling off the spark plug.

[0039] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A spark plug, characterized in that: It includes core components, connecting components and fixing components; The core component includes an insulator and a metal shell, wherein the metal shell is sleeved on the insulator to protect the insulator; The connecting component comprises a compression connector, which is sleeved on the insulator and connected to the metal shell, and one end of the compression connector has a first inner bevel inside, and the first inner bevel abuts against the insulator; The fixing component is located at one end of the insulator and above the compression connector.

2. The spark plug according to claim 1, characterized in that The insulator has a middle convex portion, and the first inner inclined surface abuts against one end of the middle convex portion.

3. The spark plug according to claim 2, characterized in that The metal shell has a second inner bevel inside, and the second inner bevel abuts against the other end of the middle raised portion.

4. The spark plug according to claim 1, wherein: The compression connector is connected to the metal shell via a threaded pair.

5. The spark plug according to claim 1, wherein: The core component also includes a center electrode; a cylindrical threaded portion is arranged at one end of the center electrode, and a positioning pin is arranged below the threaded portion.

6. The spark plug according to claim 5, characterized in that The insulator is sleeved on the central electrode, with one end of the insulator close to the threaded portion and the other end located on the positioning pin.

7. The spark plug according to claim 1, characterized in that The fixing component includes a locking washer; the locking washer is mounted on the threaded portion and is located above the insulator.

8. The spark plug according to claim 7, characterized in that The fixing component also includes a thin hexagonal nut; the thin hexagonal nut is screwed on the threaded portion and is located above the locking washer.

Images