Spark plug cap structure and connecting structure of spark plug cap structure and high-voltage line

Abstract

The utility model discloses a spark plug cap structure and a connecting structure of the spark plug cap structure and a high-voltage line, which comprises a spark plug cap body, the spark plug cap body is provided with a connecting section used for being connected with the high-voltage line, and a conductive cap, a resistor and a connecting screw which are in conductive connection are arranged in the spark plug cap body; a connecting channel is arranged in the connecting section, a screw accommodating cavity is formed in one end, close to the resistor, of the connecting channel, and the connecting screw is positioned in the screw accommodating cavity; the section, away from the screw containing cavity, of the connecting channel is formed into a connecting part used for being connected with a high-voltage wire in a sealed mode, the part, located between the connecting part and the screw containing cavity, of the connecting channel is formed into a conversion terminal containing cavity, and the diameter of the conversion terminal containing cavity is larger than the inner diameter of the connecting part. According to the utility model, the friction area of the connecting section of the high-voltage wire and the spark plug cap is greatly reduced, so that the assembly difficulty of the spark plug cap is reduced, the assembly efficiency is improved, and the performance of the spark plug cap is ensured.

Description

Technical Field

[0001] This utility model relates to the field of spark plug technology, and in particular to a spark plug cap structure and its connection structure with a high-voltage wire. Background Technology

[0002] Currently, due to the need to address interference issues in the ignition coil layout of some vehicle models, damped high-voltage wires with resistors are generally used. However, these damped high-voltage wires cannot be directly connected to the screw in the spark plug cap by screwing it in; an adapter terminal is required on the high-voltage wire. However, the current adapter terminal is larger than the connection area of ​​the spark plug cap, and the spark plug cap and high-voltage wire adapter terminal need to be sealed and waterproof. This results in an interference fit between the high-voltage wire and the adapter terminal and the spark plug cap connection after the adapter terminal is inserted into the spark plug cap, as shown in the instruction manual. Figure 3 As shown, when the adapter terminal 3' of the high-voltage wire 2' is inserted into the connecting end 4' of the spark plug cap 1', the connecting channel is completely interference-fitted with the adapter terminal and the high-voltage wire, resulting in a large friction area and thus a large friction force. Furthermore, the irregular shape of the adapter terminal makes it very difficult to screw the high-voltage wire and the adapter terminal into the spark plug cap, resulting in very low production efficiency. It may even lead to the high-voltage wire not being able to be installed properly, causing poor contact between the high-voltage wire and the spark plug cap, resulting in sparking and leakage problems, and bringing many inconveniences to the assembly of the spark plug cap. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a spark plug cap structure and its connection structure with the high voltage line, so as to solve the problems of high friction, difficulty in proper installation and low assembly efficiency caused by the interference fit between the high voltage line and the spark plug cap connection end in the prior art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A spark plug cap structure includes a spark plug cap body having a connecting section for connection to a high-voltage line. The spark plug cap body contains a conductive cap, a resistor, and a connecting screw for conductive connection. The connecting section has a connecting channel inside, with a screw receiving cavity formed at one end of the connecting channel near the resistor, and the connecting screw located within the screw receiving cavity. A portion of the connecting channel away from the screw receiving cavity is formed as a connecting part for sealed connection to the high-voltage line. The portion of the connecting channel between the connecting part and the screw receiving cavity is formed as an adapter terminal receiving cavity, and the diameter of the adapter terminal receiving cavity is larger than the inner diameter of the connecting part.

[0006] As an optimization, the axial length of the adapter terminal receiving cavity is greater than the axial length of the connection portion.

[0007] As an optimization, a transition cavity is also provided between the adapter terminal receiving cavity and the screw receiving cavity.

[0008] As an optimization, the diameter of the transition cavity is larger than the diameter of the screw receiving cavity.

[0009] Based on the above spark plug cap structure, this utility model also provides a connection structure between the spark plug cap structure and the high-voltage wire, including the high-voltage wire and the spark plug cap structure; the high-voltage wire is connected to an adapter terminal, the adapter terminal extends from the connecting part of the connecting section of the spark plug cap body into the adapter terminal receiving cavity, and is connected to a connecting screw; wherein, the high-voltage wire is sealed to the connecting part, and there is a gap or spacing between the adapter terminal and the inner wall of the adapter terminal receiving cavity.

[0010] Compared with the prior art, this application has the following advantages:

[0011] This utility model,

[0012] The transition terminal receiving cavity formed in the connecting section of the spark plug cap body accommodates the transition terminal of the high-voltage wire. During use, there is a gap or spacing between the inner wall of the transition terminal receiving cavity and the transition terminal. The inner hole of the connecting part is sealed to the high-voltage wire to ensure sealing. This greatly reduces the friction area between the high-voltage wire and the connecting section of the spark plug cap body, thereby reducing the assembly difficulty of the spark plug cap, improving assembly efficiency, and ensuring the performance of the spark plug cap. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the spark plug cap body in this utility model;

[0014] Figure 2 This is a schematic diagram of the connection structure between the spark plug cap body and the high-voltage wire in this utility model;

[0015] Figure 3 This is a schematic diagram of the connection structure between the spark plug cap body and the high-voltage wire in the prior art.

[0016] In the diagram, 1 is the spark plug cap body, 2 is the connecting section, 3 is the high-voltage wire, 4 is the adapter terminal, 5 is the adapter terminal housing cavity, 6 is the connecting part, 7 is the transition cavity, 8 is the screw housing cavity, and 9 is the connecting screw. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] In practice:

[0019] See the example. Figures 1-2To address the problems existing in the prior art, this utility model proposes a spark plug cap structure, including a spark plug cap body 1, which has a connecting section 2 for connecting to a high-voltage line 3. Specifically, the spark plug cap body 1 has a rubber seal on its outer side, and the rubber seal extends to one end of the spark plug cap body 1 to form the connecting section 2. The spark plug cap body 1 contains a conductive cap, a resistor, and a connecting screw 9 for conductive connection. The connecting section 2 has a connecting channel inside, and a screw receiving cavity 8 is formed at the end of the connecting channel near the resistor, where the connecting screw 9 is located. The section of the connecting channel away from the screw receiving cavity 8 is formed as a connecting part 6 for sealing connection with the high-voltage line 3. The portion of the connecting channel between the connecting part 6 and the screw receiving cavity 8 is formed as a transition terminal receiving cavity 5, and the diameter of the transition terminal receiving cavity 5 is larger than the inner diameter of the connecting part 6. In use, the end of the high-voltage wire 3 is provided with an adapter terminal 4. The adapter terminal 4 can extend from the connecting part 6 of the connecting section 2 of the spark plug cap body 1 into the adapter terminal receiving cavity 5 and be connected to the connecting screw 9. The high-voltage wire 3 is sealed to the connecting part 6, and there is a gap or spacing between the adapter terminal 4 and the inner wall of the adapter terminal receiving cavity 5.

[0020] The adapter terminal receiving cavity 5 formed in the connecting section 2 of the spark plug cap body 1 accommodates the adapter terminal 4 of the high-voltage wire 3. In use, there is a gap or spacing between the inner wall of the adapter terminal receiving cavity 5 and the adapter terminal 4. The inner hole of the connecting part 6 and the high-voltage wire 3 are sealed together to ensure sealing. This greatly reduces the friction area between the high-voltage wire 3 and the connecting section 2 of the spark plug cap body 1, thereby reducing the assembly difficulty of the spark plug cap, improving the assembly efficiency, and ensuring the performance of the spark plug cap.

[0021] Specifically, since the size of the adapter terminal 4 on the high-voltage line 3 is generally larger than the diameter of the high-voltage line 3, in this application, the diameter of the adapter terminal receiving cavity 5 is larger than the inner diameter of the connecting part 6. This allows the adapter terminal receiving cavity 5 to better accommodate the adapter terminal 4, ensuring a gap or spacing between the inner wall of the adapter terminal receiving cavity 5 and the adapter terminal 4, thus reducing the friction area. Simultaneously, a seal is achieved through the sealing fit between the inner hole of the connecting part 6 and the high-voltage line 3, ensuring sealing performance. Furthermore, since the high-voltage line 3 has a circular cross-section and a more regular shape, the friction force will not be too large even with an interference fit with the connecting part 6, thereby reducing friction and facilitating the connection between the high-voltage line 3 and the spark plug cap body 1, reducing assembly difficulty.

[0022] More specifically, a transition cavity 7 is provided between the adapter terminal receiving cavity 5 and the screw receiving cavity 8. The diameter of the transition cavity 7 is larger than the diameter of the screw receiving cavity 8. In this way, by adopting a multi-segment structure, the dimensions of each segment in the connection channel are matched with the contour of the adapter terminal 4, preventing loosening due to excessive gaps. At the same time, the stepped structure formed between the multi-segment structures can improve the strength and toughness of the connection end and enhance durability.

[0023] Based on the above spark plug cap structure, this utility model also provides a connection structure between the spark plug cap structure and the high-voltage wire 3, including the high-voltage wire 3 and the spark plug cap structure; the high-voltage wire 3 is connected to an adapter terminal 4, the adapter terminal 4 extends from the connecting part 6 of the connecting section 2 of the spark plug cap body 1 into the adapter terminal receiving cavity 5, and is connected to the connecting screw 9; wherein, the high-voltage wire 3 is sealed to the connecting part 6, and there is a gap or spacing between the adapter terminal 4 and the inner wall of the adapter terminal receiving cavity 5.

[0024] In summary, this utility model has a simple structure, low assembly difficulty, and high assembly efficiency.

[0025] Although embodiments of the present invention have been shown and described, those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and basis of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Therefore, the embodiments of the present invention are merely illustrative examples and do not constitute a limitation on the present invention in any way.

Claims

1. A spark plug cap structure, comprising a spark plug cap body having a connecting section for connection to a high-voltage line, wherein the spark plug cap body contains a conductive cap, a resistor, and a connecting screw for conductive connection; the connecting section has a connecting channel inside, and a screw receiving cavity is formed at one end of the connecting channel near the resistor, wherein the connecting screw is located within the screw receiving cavity; characterized in that, The section of the connecting channel away from the screw receiving cavity is formed as a connecting part for sealing connection with the high-voltage line. The portion of the connecting channel between the connecting part and the screw receiving cavity is formed as a transition terminal receiving cavity, and the diameter of the transition terminal receiving cavity is larger than the inner diameter of the connecting part.

2. The spark plug cap structure according to claim 1, characterized in that, The axial length of the adapter terminal receiving cavity is greater than the axial length of the connecting part.

3. The spark plug cap structure according to claim 1, characterized in that, A transition cavity is also provided between the adapter terminal receiving cavity and the screw receiving cavity.

4. The spark plug cap structure according to claim 3, characterized in that, The diameter of the transition cavity is larger than the diameter of the screw receiving cavity.

5. A connection structure between a spark plug cap and a high-voltage line, characterized in that, The device includes a high-voltage wire and a spark plug cap structure as described in any one of claims 1-4; the high-voltage wire is connected to an adapter terminal, the adapter terminal extends from the connecting portion of the connecting section of the spark plug cap body into the adapter terminal receiving cavity, and is connected to a connecting screw; wherein the high-voltage wire is sealed to the connecting portion, and there is a gap or spacing between the adapter terminal and the inner wall of the adapter terminal receiving cavity.

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