Spark plug with high sealing performance

Abstract

The utility model discloses a spark plug with high sealing performance, which comprises a spark plug main body, and further comprises a fixing component, the fixing component comprises a fixing thread arranged at the electrode end of the spark plug main body, and the outer side of the spark plug main body is provided with a positioning part; the sealing assembly is arranged on the outer side of the spark plug body, the sealing assembly comprises a deformation sealing ring arranged on the outer side of the spark plug body in a sleeving mode, and a sealing supplementing part used for filling a residual gap of the deformation sealing ring is arranged on the side, away from the fixing threads, of the deformation sealing ring; according to the utility model, the sealing supplement part is arranged at the top of the deformed sealing ring at the outer side of the spark plug main body, when the spark plug main body is fixed through the fixing thread and rotates through the positioning part, the deformed sealing ring is extruded, the deformed sealing ring deforms, and the sealing supplement part deforms, so that the deformed sealing ring and the engine threaded interface are sealed again; therefore, the problem of sealing failure caused by a gap due to infirm sealing of the deformed sealing ring is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of spark plugs, in particular to a spark plug with high sealing performance. Background Art

[0002] During engine operation, the spark plug is a key component of the ignition system, and its sealing performance is crucial to the stable operation of the engine. Traditional spark plugs usually use deformable sealing rings to achieve sealing at the engine threaded interface. However, in actual applications, due to manufacturing errors, material aging or temperature changes, the deformed sealing ring may not seal firmly, resulting in the generation of gaps, which in turn affects the performance and emissions of the engine. Therefore, in order to prevent the gap from affecting the sealing of the spark plug and extend the sealing use of the spark plug, the utility model proposes a high-sealing spark plug. Utility Model Content

[0003] The purpose of the present utility model is to provide a spark plug with high sealing performance to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a high-sealing spark plug, comprising a spark plug body, and further comprising:

[0005] A fixing assembly, the fixing assembly being used for rotationally fixing the spark plug body to the engine, the fixing assembly comprising a fixing thread provided on the electrode end of the spark plug body, and a positioning portion for rotating the spark plug body being provided on the outer side of the spark plug body;

[0006] A sealing assembly is arranged on the outside of the spark plug body, and is used to seal the intersection of the fixed thread and the engine thread. The sealing assembly includes a deformable sealing ring sleeved on the outside of the spark plug body, and a sealing supplementary portion for filling the residual gap of the deformed sealing ring is provided on the side of the deformable sealing ring away from the fixed thread.

[0007] Preferably, the inner wall of the deformable sealing ring is provided with a deformation groove, and the deformation groove is used to assist the extrusion deformation of the deformable sealing ring.

[0008] Preferably, the sealing supplement portion includes a rubber ring, the inner side of the rubber ring is sleeved on the outer side of the deformable sealing ring, and the inner side of the rubber ring is provided with a reinforcing member for strengthening the connection between the rubber ring and the deformable sealing ring.

[0009] Preferably, the reinforcement includes a positioning ring, which is sleeved on the outside of the deformable sealing ring. The outer side of the positioning ring is inserted and connected to the inner wall of the rubber ring. The positioning ring is used to prevent the rubber ring from falling off and separating from the deformable sealing ring.

[0010] Preferably, a fixing groove for inserting a positioning ring is provided on the inner wall of the rubber ring, and a positioning protrusion is provided on the side of the positioning ring, and the top of the positioning protrusion is inserted and connected to the inner wall of the fixing groove.

[0011] Preferably, a limiting groove is provided on the top of the deformable sealing ring, and the limiting groove is used to limit the insertion distance between the deformable sealing ring and the rubber ring.

[0012] Preferably, the positioning portion includes a hexagonal protrusion, and the hexagonal protrusion is sleeved on the outer side of the spark plug body.

[0013] Preferably, a wiring nut is provided at the end of the spark plug body, and the wiring nut is used to connect a high-voltage wire.

[0014] The technical effects and advantages of this utility model are:

[0015] The utility model provides a sealing supplement portion on the top of the deformed sealing ring on the outer side of the spark plug body. When the spark plug body is fixed by the fixing thread and rotated through the positioning portion, the deformed sealing ring is squeezed and deformed. At the same time, the sealing supplement portion is deformed, and the deformed sealing ring and the engine thread interface are sealed again, thereby preventing the deformed sealing ring from having a gap due to loose sealing and causing sealing failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is one of the schematic structural diagrams of the entire utility model.

[0017] Figure 2 This is the second schematic diagram of the overall structure of the utility model.

[0018] Figure 3 It is a structural schematic diagram of the rubber ring and the deformable sealing ring of the utility model.

[0019] Figure 4 It is a cross-sectional view of the rubber ring and the deformable sealing ring of the utility model.

[0020] In the figure: 1. Spark plug body; 101. Wiring nut; 102. Hexagonal protrusion; 103. Fixing thread; 2. Rubber ring; 201. Fixing groove; 3. Deformed sealing ring; 301. Deformed groove; 302. Positioning ring; 3021. Positioning protrusion; 303. Limiting groove. DETAILED DESCRIPTION

[0021] 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.

[0022] The utility model provides Figure 1-4 A high-sealing spark plug shown includes a spark plug body 1, a fixing assembly and a sealing assembly;

[0023] It should be noted that a terminal nut 101 is provided at the end of the spark plug body 1, and the terminal nut 101 is used to connect the high-voltage wire. The spark plug body 1 and the terminal nut 101 constitute the overall model KH7RTII-6 resistance type spark plug working principle;

[0024] Specifically, the fixing assembly is used to fix the spark plug body 1 to the engine for rotation. The fixing assembly includes a fixing thread 103 provided on the electrode end of the spark plug body 1. A positioning portion for rotating the spark plug body 1 is provided on the outer side of the spark plug body 1.

[0025] It should be noted that the positioning portion includes a hexagonal protrusion 102, which is sleeved on the outer side of the spark plug body 1. The hexagonal protrusion 102 and the outer shell of the spark plug body 1 are integrally cast.

[0026] Specifically, the sealing assembly is arranged on the outside of the spark plug body 1, and the sealing assembly is used to seal the intersection of the fixed thread 103 and the engine thread. The sealing assembly includes a deformable sealing ring 3 sleeved on the outside of the spark plug body 1;

[0027] It should be noted that the deformable sealing ring 3 is made of copper, and a deformation groove 301 is provided on the inner wall of the deformable sealing ring 3. The deformation groove 301 is used to assist the extrusion deformation of the deformable sealing ring 3. A sealing supplementary portion is provided on the side of the deformable sealing ring 3 away from the fixing thread 103 to fill the remaining gap of the deformable sealing ring 3.

[0028] Specifically, the sealing supplement part includes a rubber ring 2, the inner side of the rubber ring 2 is sleeved on the outer side of the deformable sealing ring 3, and a reinforcement member is provided on the inner side of the rubber ring 2 for strengthening the connection between the rubber ring 2 and the deformable sealing ring 3;

[0029] It should be noted that the reinforcement includes a positioning ring 302, which is sleeved on the outside of the deformable sealing ring 3. The outer side of the positioning ring 302 is inserted and connected to the inner wall of the rubber ring 2. The positioning ring 302 is used to prevent the rubber ring 2 from falling off and separating from the deformable sealing ring 3.

[0030] Specifically, the positioning ring 302 and the deformable sealing ring 3 are integrally cast. The inner wall of the rubber ring 2 is provided with a fixing groove 201 for the positioning ring 302 to be inserted. A positioning protrusion 3021 is welded on the side of the positioning ring 302. The top of the positioning protrusion 3021 is inserted and connected to the inner wall of the fixing groove 201.

[0031] A limiting groove 303 is provided on the top of the deformable sealing ring 3. The limiting groove 303 is used to limit the insertion distance between the deformable sealing ring 3 and the rubber ring 2. The rubber ring 2 at the limiting groove 303 deflects the gap between the deformable sealing ring 3 and the rubber ring 2 at the limiting groove 303, and the rubber ring 2 at this location also increases the contact surface between the deformable sealing ring 3 and the outer side of the spark plug body 1, thereby squeezing and sealing the connection between the deformable sealing ring 3 and the spark plug body 1.

[0032] During actual use, a sealing supplement part is provided on the top of the deformed sealing ring 3 on the outside of the spark plug body 1. When the spark plug body 1 is fixed by the fixing thread 103 and rotated by the positioning part, the deformed sealing ring 3 is squeezed and deformed. At the same time, the sealing supplement part is deformed, and the deformed sealing ring 3 and the engine thread interface are sealed again, thereby preventing the occurrence of sealing failure caused by the presence of gaps in the deformed sealing ring 3 due to poor sealing.

[0033] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-sealing spark plug, comprising a spark plug body (1), characterized in that: Also includes: A fixing assembly, the fixing assembly being used for rotationally fixing a spark plug body (1) to an engine, the fixing assembly comprising a fixing thread (103) provided on an electrode end of the spark plug body (1), and a positioning portion for rotating the spark plug body (1) being provided on the outer side of the spark plug body (1); A sealing assembly is provided on the outside of a spark plug body (1), and is used to seal the intersection of a fixed thread (103) and an engine thread. The sealing assembly comprises a deformable sealing ring (3) sleeved on the outside of the spark plug body (1), and a sealing supplementary portion for filling a residual gap of the deformable sealing ring (3) is provided on a side of the deformable sealing ring (3) away from the fixed thread (103).

2. A high sealing spark plug according to claim 1, characterized in that: The inner wall of the deformable sealing ring (3) is provided with a deformation groove (301), and the deformation groove (301) is used to assist the extrusion deformation of the deformable sealing ring (3).

3. A high sealing spark plug according to claim 2, characterized in that: The sealing supplement part comprises a rubber ring (2), the inner side of the rubber ring (2) is sleeved on the outer side of the deformable sealing ring (3), and the inner side of the rubber ring (2) is provided with a reinforcing member for reinforcing the connection between the rubber ring (2) and the deformable sealing ring (3).

4. A high sealing spark plug according to claim 3, characterized in that: The reinforcement member comprises a positioning ring (302), the positioning ring (302) being sleeved on the outside of the deformable sealing ring (3), the outer side of the positioning ring (302) being inserted and connected to the inner wall of the rubber ring (2), and the positioning ring (302) being used to prevent the rubber ring (2) from falling off and separating from the deformable sealing ring (3).

5. A high sealing spark plug according to claim 4, characterized in that: The inner wall of the rubber ring (2) is provided with a fixing groove (201) for the positioning ring (302) to be inserted, and the side of the positioning ring (302) is provided with a positioning protrusion (3021), and the top of the positioning protrusion (3021) is inserted and connected to the inner wall of the fixing groove (201).

6. A high sealing spark plug according to claim 1, characterized in that: A limiting groove (303) is provided on the top of the deformable sealing ring (3), and the limiting groove (303) is used to limit the insertion distance between the deformable sealing ring (3) and the rubber ring (2).

7. A high sealing spark plug according to claim 6, characterized in that: The positioning portion comprises a hexagonal protrusion (102), and the hexagonal protrusion (102) is sleeved on the outside of the spark plug body (1).

8. The high-sealing spark plug according to claim 6, characterized in that: A wiring nut (101) is provided at the end of the spark plug body (1), and the wiring nut (101) is used for connecting a high-voltage wire.

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