Automotive ignition device

Abstract

The application discloses a vehicle ignition device belonging to the field of ignition devices of internal combustion engines, comprising an ignition coil and a spark plug, and a high-voltage output end of the ignition coil is provided with an insulating sleeve, characterized in that: the insulating sleeve is provided with an elastic conductive connecting piece, the conductive connecting piece is filled with inert gas, one end of the conductive connecting piece is clamped with a high-voltage terminal, the other end of the conductive connecting piece can abut against a wiring nut of the spark plug, the spark plug penetrates into the insulating sleeve, the conductive connecting piece is compressed, the compression elastic force of the conductive connecting piece and the compression elastic force of the inert gas jointly act, and the two ends of the conductive connecting piece abut against the high-voltage terminal and the spark plug respectively. In the process of vehicle driving, the conductive connecting piece cannot appear axial movement and radial shaking, the occurrence of electric breakdown is effectively prevented, the conductive connecting piece is filled with inert gas inside, the corona or arc phenomenon of the conductive connecting piece in the process of electric conduction is prevented, and the structural stability and service life of the vehicle ignition device are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of ignition devices for internal combustion engines, and more specifically to automotive ignition devices. Background Technology

[0002] With the development of automotive ignition system technology, ignition coils, as a core component of internal combustion engine ignition systems, have been widely used in various engines. Their main function is to convert low-voltage direct current into high-voltage current, thereby generating an electric spark in the spark plug gap to ignite the air-fuel mixture. In recent years, to improve ignition reliability, durability, and electromagnetic compatibility, many companies have continuously optimized the structural design, insulation performance, and electrical connection stability of ignition coils.

[0003] Chinese invention patent publication number "CN110648830B" discloses an ignition coil unit and ignition system for an internal combustion engine. This is based on paragraphs

[0026] to

[0060] of the specification and the appendix. Figure 1 As can be seen, the ignition coil unit includes a coil unit that generates high voltage and a cylindrical connecting unit that connects the coil unit to the spark plug. The coil unit includes a main housing that houses the various components of the coil unit and a housing unit that includes a high-voltage tower. The high-voltage tower is cylindrical and protrudes from the main housing along the Z-axis to the front end (of the ignition coil unit). An elastic conductive helical spring that can deform along the Z-axis is inserted inside the cylindrical connecting unit and located inside the connector and the high-voltage tower. The helical spring elastically contacts the high-voltage terminal located inside the high-voltage tower, and the helical spring is positioned relative to the connector in the Z-axis direction.

[0004] However, the aforementioned ignition coil uses an elastic conductive helical spring as the direct electrical connection between the ignition coil and the spark plug. The helical spring is installed inside the cylindrical connecting unit. Due to the radial gap between the conductive spring and the inner wall of the cylindrical connecting unit, axial movement and radial sway are prone to occur during vehicle operation. This results in uneven contact pressure between the conductive spring and the ignition coil and spark plug, which can easily lead to increased contact resistance, local overheating, or even high-voltage breakdown and melting.

[0005] Secondly, because the inner cavity of the cylindrical connecting unit is not a sealed structure, air is retained inside the cylindrical connecting unit. The conductive spring has a spiral structure, and some areas are compressed when the ignition coil is connected to the spark plug, generating an uneven electric field, which in turn causes a corona phenomenon. This corrodes the conductive spring and causes energy loss, resulting in a decrease in the electrical energy transferred to the spark plug. Consequently, the engine cannot ignite effectively, making it difficult to meet the requirements of a highly reliable and long-life automotive ignition system.

[0006] Therefore, it is necessary to improve upon the aforementioned shortcomings. Summary of the Invention

[0007] The purpose of this invention is to provide an automotive ignition device that has high energy transfer efficiency, stable ignition performance, and long service life, so as to solve the above-mentioned problems existing in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an automotive ignition device, including an ignition coil and a spark plug, wherein an insulating sleeve is provided at one end of the ignition coil near the high-voltage terminal, and a snap-fit ​​sleeve is also provided on the outer periphery of the high-voltage terminal, characterized in that: an elastic conductive connector is inserted through the insulating sleeve, the conductive connector is filled with inert gas, one end of the conductive connector is snapped into the snap-fit ​​sleeve and abuts against the high-voltage terminal, and the other end can abut against the terminal nut of the spark plug, the spark plug is inserted into the insulating sleeve, causing the conductive connector to compress, the compression elasticity of the conductive connector itself and the compression elasticity of the inert gas work together to cause both ends of the conductive connector to abut against the high-voltage terminal and the spark plug respectively.

[0009] By adopting the above technical solution: the conductive connector has a corrugated shape in the middle. When the spark plug is inserted into the insulating sleeve, the spark plug will compress the conductive connector. The middle part of the conductive connector is compressed and expands outward, and the two ends abut against the high-voltage terminal and the end of the spark plug, respectively. Compared with the traditional method of directly using a conductive spring as an electrical connector, the conductive connector, when compressed, will simultaneously utilize its own stored elastic potential energy and the pressure of the inert gas compressed in the gas, making the electrical connection between the two ends of the conductive connector and the high-voltage terminal and the spark plug more stable. During the vehicle's operation, the conductive connector will not experience axial movement or radial wobbling, effectively preventing electrical breakdown. Furthermore, the conductive connector is filled with inert gas, which can prevent corona or arcing during the conductive process, effectively improving the structural stability and service life of the automotive ignition system.

[0010] The aforementioned automotive ignition device can be further configured as follows: the conductive connector includes a bellows, two sets of heated ceramicized silicone rubber parts, a conductive part located within the silicone rubber parts, and a conductive spring for connecting the two sets of conductive parts. The bellows includes several U-shaped deformation sections, several support sections, and two sets of connecting pipes. The deformation sections and support sections are staggered along the axial direction of the bellows. A mounting boss is provided inside the connecting pipe. The silicone rubber parts pass through the connecting pipe. A first sealing element is provided between the silicone rubber parts and the mounting boss. The conductive part and the silicone rubber parts are interference-fitted. A limiting end cap for limiting the silicone rubber parts is provided at the end of the connecting pipe. A limiting edge is provided in the middle of the limiting end cap. The outer ring of the limiting end cap is threaded to the connecting pipe, and the limiting edge is threaded to the silicone rubber parts.

[0011] By adopting the above technical solution: the bellows is made of beryllium bronze, which has good elasticity and fatigue performance. The deformation section and support section of the bellows are staggered. When the bellows is compressed, the deformation section deforms, while the support section maintains the overall shape of the bellows during compression. This ensures the bellows' compressive deformation capacity while providing axial support, improving the bellows' radial anti-interference capability and axial deformation capacity. In addition, the silicone rubber component is sleeved around the conductive component and passes through the connecting pipe. The outer wall of the silicone rubber component is interference-fitted with the inner wall of the connecting pipe, and the outer wall of the conductive component is also interference-fitted with the inner wall of the silicone rubber component. An interference fit is used to seal the inner cavity of the bellows. Simultaneously, the conductive spring first engages with the conductive component at one end, and the other end passes through the bellows and engages with the conductive component at the other end, improving the stability of the connection between the conductive spring and the conductive component. Subsequently, the end face of the silicone rubber component and the mounting boss engage, and the first sealing component fills the gap between the silicone rubber component and the mounting boss, further improving the airtightness of the bellows. After the silicone rubber component is inserted, the outer ring of the limiting end cap is threadedly connected to the connecting pipe, and the limiting perimeter plate is threadedly connected to the silicone rubber component. The end face of the limiting perimeter plate abuts against the end face of the conductive component, fixing the silicone rubber component and the conductive component inside the connecting pipe.

[0012] The aforementioned automotive ignition device can be further configured as follows: the conductive component includes a contact part, a conductive part, and a connecting part. The contact part has a receiving groove, the conductive part has an annular groove, the silicone rubber component has an annular block, the annular block cooperates with the annular groove, the annular groove also has a second sealing component, the connecting part has an annular connecting groove at its end, the side wall of the annular connecting groove has a plurality of arc-shaped first buckles and second buckles, the first buckles and second buckles cooperate to form a spring retainer, the first coil of the conductive spring end passes into the connecting groove and is engaged in the spring retainer.

[0013] By adopting the above technical solution: when the high-voltage terminal and spark plug are inserted into the silicone rubber component, the ends of the high-voltage terminal and spark plug can be inserted into the receiving groove to prevent the high-voltage terminal and spark plug from sliding. When the conductive component is installed in the silicone rubber component, the annular locking block will be inserted into the annular locking groove of the conductive part, thereby positioning and installing the conductive component in the silicone rubber component. The second sealing component in the annular locking groove can fill the gap between the silicone rubber component and the conductive component, improving the sealing performance between the silicone rubber component and the conductive component. At the same time, the first ring of the end of the conductive spring can be inserted into the annular connecting groove and limited by the spring retainer. The distance between the ends of the first and second snaps and the connection point of the conductive component is smaller than the diameter of the spring retainer. When the conductive spring is inserted into the spring retainer, the first and second snaps can bond the conductive spring, so that the end of the conductive spring and the conductive component maintain stable contact, improving the stability of electrical transmission of the conductive connector.

[0014] The aforementioned automotive ignition device can be further configured such that: the connecting part covers the connecting groove and is provided with an elastic connecting plate, one end of which can abut against the first coil of the conductive spring and the other end can contact the second coil of the conductive spring.

[0015] By adopting the above technical solution: when the first coil of the conductive spring is rotated and inserted into the annular connecting groove, the second coil of the conductive spring can abut against the connecting plate, causing the connecting plate to undergo elastic deformation into the annular connecting groove. The side of the connecting plate opposite to the second coil of the conductive spring abuts against the outer surface of the first coil of the conductive spring, thus limiting and fixing the first coil of the conductive spring in the annular connecting groove, further improving the stability of the connection between the conductive spring and the conductive component.

[0016] The aforementioned automotive ignition device can be further configured such that: both ends of the bellows also include semi-circular telescopic covers, one end of which is connected to the connecting pipe and the other end is connected to the deformation section.

[0017] By adopting the above technical solution: when the bellows is compressed, the edge of the telescopic cover will expand outward at the connection between the telescopic cover and the deformation section, causing the deformation section and the support section to expand outward from the center. The crest of the deformation section can abut against the inner wall of the insulating sleeve, which can further improve the stability of the conductive connector during vehicle operation.

[0018] The aforementioned automotive ignition device can be further configured as follows: the first sealing element includes a sealing ring, a telescopic sealing section, and an axial sealing cylinder. The sealing ring has an annular sealing boss on one end face near the silicone rubber component, and the sealing boss can abut against the silicone rubber component. One end of the telescopic sealing section is connected to the sealing boss, and the other end is connected to the circumferential sealing cylinder. The end of the silicone rubber component has a compression boss and a connecting boss. The connecting boss slides with the axial sealing cylinder. The compression boss is used to compress the telescopic sealing end, causing the inner wall of the axial sealing cylinder to have an interference fit with the outer circumference of the connecting boss.

[0019] By adopting the above technical solution: when the silicone rubber component is inserted into the connecting pipe, the connecting convex ring is inserted into the axial sealing cylinder in the middle of the sealing ring. One side of the sealing ring abuts against the mounting boss, and the other side abuts against the silicone rubber component. The squeezing boss squeezes the telescopic sealing section, causing the telescopic sealing section to deform and causing the axial sealing cylinder to contract inward. The inner wall of the circumferential sealing cylinder abuts against the outer circumferential surface of the connecting convex ring, thereby achieving a seal on the connecting pipes at both ends of the bellows. Furthermore, the telescopic sealing end, the axial sealing cylinder, and the sealing ring are integrally formed. The first sealing element can stably achieve a seal on the silicone rubber component and the inner cavity of the connecting pipe, preventing the leakage of inert gas from the inner cavity of the bellows.

[0020] The aforementioned automotive ignition device can be further configured such that: the bellows is equipped with a one-way valve assembly, the one-way valve assembly includes a one-way intake valve and a one-way exhaust valve, the one-way intake valve and the one-way exhaust valve are respectively located at both ends of the bellows near the connecting pipe, the one-way intake valve is used to inflate the inner cavity of the bellows and discharge it through the one-way exhaust valve.

[0021] By adopting the above technical solution, a one-way intake valve and a one-way exhaust valve are installed on the bellows, which facilitates the filling and replacement of inert gas in the inner cavity of the bellows, ensuring the purity and pressure stability of the gas in the inner cavity. When it is necessary to fill the bellows, inert gas is injected through the one-way intake valve. At the same time, the one-way exhaust valve can be used to discharge the original air or overpressure gas, avoiding the occurrence of corona discharge, improving the sealing and reliability of the conductive connectors, and extending the service life of the automotive ignition device.

[0022] The aforementioned automotive ignition device can be further configured such that: the inner wall of the snap-fit ​​cylinder is provided with a wedge-shaped snap-fit ​​boss, and the outer periphery of the connecting pipe near the high-voltage terminal of the corrugated pipe is provided with a wedge-shaped snap-fit ​​ring groove, and the snap-fit ​​boss can be inserted into the snap-fit ​​ring groove to realize the assembly of the conductive connector and the ignition coil.

[0023] By adopting the above technical solution: when the conductive connector is inserted into the insulating sleeve, and the connecting pipe on the side of the corrugated pipe near the high-voltage terminal is inserted into the snap-fit ​​cylinder, the snap-fit ​​boss can snap into the snap-fit ​​ring groove, thereby assembling the conductive connector with the ignition coil and improving the ease of assembling the automotive ignition coil.

[0024] The aforementioned automotive ignition device can be further configured such that: the ignition coil also includes a housing, the outer side of the housing is provided with a wiring port, a number of wiring terminals are provided inside the wiring port, a connecting cylinder is provided below the housing, the connecting cylinder is provided with external threads on its periphery, the end of the insulating sleeve is provided with internal threads that mate with the external threads, and the insulating sleeve is threadedly connected to the connecting cylinder.

[0025] By adopting the above technical solution, the insulating sleeve is securely connected to the connecting cylinder below the ignition coil housing via a threaded connection, achieving a reliable connection and accurate positioning between the two. This ensures the mechanical strength of the connection between the insulating sleeve and the housing, effectively preventing loosening under vehicle vibration. Furthermore, the abutment of the threaded mating surfaces enhances the sealing performance of the connection, helping to prevent the intrusion of external moisture and contaminants. Simultaneously, it facilitates installation and disassembly, providing convenience for subsequent maintenance and further improving the overall structural integrity and long-term reliability of the ignition device.

[0026] The aforementioned automotive ignition device can be further configured such that: the insulating sleeve is provided with several sets of elastic protrusions, with each pair of adjacent sets of elastic protrusions spaced apart on the outer circumferential surface of the insulating sleeve, and the elastic protrusions can be interference-fitted with the inner wall of the engine mounting hole. An exhaust port is provided through the outer circumferential surface of the insulating sleeve near the spark plug end.

[0027] By adopting the above technical solution—the elastic protrusion's interference fit with the inner wall of the engine mounting hole—a stable and reliable radial support is provided for the insulating sleeve, effectively suppressing component loosening and displacement caused by vibration during vehicle operation, and enhancing the structural stability of the entire ignition system under harsh conditions. Simultaneously, the vent at the end of the insulating sleeve allows residual air in the sleeve's internal cavity to be discharged promptly during spark plug installation, ensuring a clean and dry internal gas environment. This avoids the risk of creepage or breakdown caused by residual moisture and also improves the heat dissipation of internal components, thereby synergistically enhancing the long-term reliability and durability of the ignition system.

[0028] The beneficial effects of this invention are as follows:

[0029] First, when the spark plug is inserted into the insulating sleeve and the two ends of the conductive connector are in contact with the high-voltage terminal and the spark plug respectively, due to the staggered distribution of the deformation section and the support section, as the spark plug continues to be inserted, the bellows of the conductive connector is compressed by force, the deformation section undergoes elastic deformation, and the support section prevents the deformation sections on both sides from misaligning. In addition, during the compression process, the deformation section of the bellows undergoes elastic deformation, and the support section moves axially. Compared with the traditional automotive ignition device that uses a conductive spring as the electrical connector between the ignition coil and the spark plug, the conductive connector of this application, by setting a conductive spring in the bellows and filling the inner cavity of the bellows with inert gas, after compression, through the elastic potential energy of the bellows after compression and the gas pressure of the inert gas inside, can stably connect the conductive parts at both ends of the bellows to the high-voltage terminal and the spark plug respectively. Moreover, while the deformation section maintains the compression deformation of the conductive connector, the support section can maintain the radial stability of the conductive connector, preventing the conductive connector from wobbling radially, thus improving the stability of the electrical connection between the conductive connector and the high-voltage terminal and the spark plug.

[0030] Secondly, the conductive component is divided into an abutment part, a conductive part, and a connecting part. An annular connecting groove is opened at the end of the connecting part, and multiple first and second buckles are set in the annular connecting groove. When the end of the conductive spring is screwed into the annular connecting groove, it can be engaged in the spring retainer by the first and second buckles. The distance between the connection point of the first and second buckles and the conductive component is smaller than the diameter of the spring retainer, making the electrical connection between the two ends of the conductive spring and the conductive component more stable. At the same time, a part of the annular connecting groove is covered by a connecting plate. When the conductive spring is compressed, one side of the connecting plate can abut against the first coil of the conductive spring in the annular connecting groove, and the other side can abut against the second coil of the conductive spring, further improving the stability of the conductive spring and the conductive component. The electrical transmission of the conductive connector is more stable and efficient.

[0031] Third, the receiving groove opened in the abutment part of the conductive component allows the ends of the high-voltage terminal and spark plug to abut against the bottom of the receiving groove when the two ends of the conductive connector abut against the high-voltage terminal and spark plug respectively. The side wall of the receiving groove can prevent the connection between the two ends of the conductive connector and the high-voltage terminal and spark plug, and prevent the two ends from shaking. In addition, the conductive part in the middle of the conductive component cooperates with the annular block on the inner wall of the silicone rubber component through the annular groove to achieve positioning and cooperation with the silicone rubber component, and realize the rapid assembly of the silicone rubber component and the conductive component. At the same time, a second sealing element is set in the annular groove to fill the gap between the annular block and the annular groove, and improve the tightness of the connection between the silicone rubber component and the conductive component.

[0032] Fourth, when the bellows is compressed, the peaks of the deformation section expand radially. Telescopic shields are installed at both ends of the bellows. When the conductive connector is compressed, the edges of the telescopic shields open outwards, which can simultaneously drive the deformation section and support section in the middle of the bellows to open outwards, increasing the radial expansion of the bellows. This allows the outer circumference of the deformation section to abut against the inner wall of the insulating sleeve, further improving the stability of the conductive connector during vehicle operation.

[0033] Fifth, the first sealing element includes a sealing ring, a telescopic sealing section, and an axial sealing cylinder. When the silicone rubber component is inserted into the connecting pipes at both ends of the bellows, the extrusion boss of the silicone rubber component compresses the telescopic sealing section. The deformation of the telescopic sealing section pushes the axial sealing section to contract inward, abutting against the outer circumferential surface of the connecting ring of the silicone rubber component. This further improves the airtightness of the connection between the silicone rubber component and the bellows. After the connecting pipe and the silicone rubber component are assembled, the limiting end cap can engage with the outer circumferential thread of the connecting pipe and the inner thread of the limiting edge of the silicone rubber component, fixing the silicone rubber component in the connecting pipe, maintaining the state of the first sealing element, and maintaining the airtightness of the conductive connector.

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of an automotive ignition device according to Embodiment 1 of the present invention;

[0036] Figure 2 This is a cross-sectional schematic diagram of an automotive ignition device according to Embodiment 1 of the present invention;

[0037] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of section A in the middle;

[0038] Figure 4 This is a cross-sectional structural diagram of the conductive connector according to Embodiment 1 of the present invention;

[0039] Figure 5 This is a schematic diagram of the bellows structure according to Embodiment 1 of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the silicone rubber part according to Embodiment 1 of the present invention;

[0041] Figure 7 This is a schematic diagram of the conductive component according to Embodiment 1 of the present invention;

[0042] Figure 8 This is a schematic diagram of the assembly of the conductive component and the conductive spring according to Embodiment 1 of the present invention;

[0043] Figure 9 This is a schematic diagram of the structure of the limiting end cap according to Embodiment 1 of the present invention;

[0044] Figure 10 This is a schematic diagram of the spark plug structure of the present invention;

[0045] Figure 11 This is a schematic diagram of the structure of the first sealing element in Embodiment 2 of the present invention;

[0046] Figure 12 This is a schematic diagram of the combination of the first sealing element, the silicone rubber element, and the connecting pipe in Embodiment 2 of the present invention;

[0047] Figure 13 This is a cross-sectional schematic diagram of an automotive ignition device according to Embodiment 3 of the present invention;

[0048] Figure 14 This is a cross-sectional structural diagram of the conductive connector according to Embodiment 3 of the present invention;

[0049] Figure 15 This is a schematic diagram of the bellows structure according to Embodiment 3 of the present invention;

[0050] Figure 16 This is a schematic diagram of the one-way intake valve of the present invention;

[0051] Figure 17 This is a schematic diagram of the one-way exhaust valve of the present invention;

[0052] Labeling notes: Ignition coil 1, Insulating sleeve 11, High voltage terminal 12, Housing 13, Wiring port 14, Wiring terminal 15, Connecting cylinder 16, Snap-fit ​​cylinder 17, Snap-fit ​​boss 171, Elastic boss 18, Exhaust hole 19.

[0053] Spark plug 2

[0054] Conductive connector 3, bellows 31, deformation section 311, support section 312, connecting pipe 313, snap ring groove 3131, mounting boss 314, telescopic cover 315, silicone rubber part 32, annular snap block 321, extrusion boss 322, connecting boss 323, conductive part 33, abutment part 331, receiving groove 3311, conductive part 332, annular snap groove 3321, second seal 3322, connecting part 333, connecting groove 3331, first snap 3332, second snap 3333, spring snap ring 3334, connecting plate 3335, conductive spring 34, first seal 35, sealing ring 351, telescopic sealing section 352, axial sealing cylinder 353, sealing boss 354, limiting end cover 36, limiting perimeter 361, one-way valve assembly 37, one-way air inlet valve 371, one-way exhaust valve 372. Detailed Implementation

[0055] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] Example 1: Automotive ignition system, such as Figures 1 to 10 As shown, the device includes an ignition coil 1 and a spark plug 2. The high-voltage output end of the ignition coil 1 is provided with an insulating sleeve 11. An elastic conductive connector 3 is inserted through the sleeve. The conductive connector 3 is filled with inert gas. One end of the conductive connector 3 abuts against the high-voltage terminal 12, and the other end can abut against the wiring nut of the spark plug 2. The spark plug 2 is inserted into the insulating sleeve 11, which causes the conductive connector 3 to be compressed. The compression elasticity of the conductive connector 3 itself and the compression elasticity of the inert gas work together to cause both ends of the conductive connector 3 to abut against the high-voltage terminal 12 and the spark plug 2, respectively.

[0057] like Figure 1 , Figure 2 , Figure 3 As shown, the ignition coil 1 also includes a housing 13. A wiring port 14 is provided on the outside of the housing 13. Several wiring terminals 15 are provided inside the wiring port 14. A connecting cylinder 16 is provided below the housing 13. The connecting cylinder 16 has external threads on its periphery. The end of the insulating sleeve 11 has an internal thread that mates with the external threads. The insulating sleeve 11 is threadedly connected to the connecting cylinder 16. The inner wall of the snap-fit ​​cylinder 17 has a wedge-shaped snap-fit ​​boss 171.

[0058] The insulating sleeve 11 is provided with several sets of elastic protrusions 18, with each pair of adjacent sets of elastic protrusions 18 spaced apart on the outer circumferential surface of the insulating sleeve 11. The elastic protrusions 18 can be interference-fitted with the inner wall of the engine mounting hole. An exhaust hole 19 is provided through the outer circumferential surface of the insulating sleeve 11 near the spark plug 2.

[0059] like Figure 4 As shown, the conductive connector 3 includes a bellows 31, two sets of heated ceramicized silicone rubber parts 32, a conductive part 33 located inside the silicone rubber parts 32, and a conductive spring 34 for connecting the two sets of conductive parts 33. The bellows 31 includes several U-shaped deformation sections 311, several support sections 312, and two sets of connecting pipes 313. The deformation sections 311 and support sections 312 are staggered along the axial direction of the bellows 31. The connecting pipes 313 are provided with mounting bosses 314. The silicone rubber parts 32 pass through the connecting pipes 313. A first sealing element 35 is provided between the silicone rubber parts 32 and the mounting bosses 314. The conductive part 33 and the silicone rubber parts 32 are interference-fitted. The end of the connecting pipes 313 is provided with a limiting end cap 36 for limiting the silicone rubber parts 32.

[0060] like Figure 9 As shown, the limiting end cap 36 has a limiting edge 361 in the middle. The outer ring of the limiting end cap 36 is threaded to the connecting pipe 313, and the limiting edge 361 is threaded to the silicone rubber part 32. The corrugated pipe 31 has a wedge-shaped snap ring groove 3131 on the outer periphery of the connecting pipe 313 near the high voltage terminal 12. The snap protrusion 171 can be inserted into the snap ring groove 3131 to realize the assembly of the conductive connector 3 and the ignition coil 1.

[0061] like Figure 3 , Figure 4 , Figure 7 , Figure 8 As shown, the conductive component 33 includes an abutment portion 331, a conductive portion 332, and a connecting portion 333. The abutment portion 331 has a receiving groove 3311. The conductive portion 332 has an annular groove 3321 circumferentially. An annular block 321 is provided inside the silicone rubber component 32. The annular block 321 cooperates with the annular groove 3321. A second sealing component 3322 is also provided inside the annular groove 3321. An annular connecting groove 3331 is provided at the end of the connecting portion 333. Several arc-shaped first buckles 3332 and second buckles 3333 are provided on the side wall of the annular connecting groove 3331. The first buckles 3332 and the second buckles 3333 cooperate to form a spring retainer 3334. The first coil at the end of the conductive spring 34 passes into the connecting groove 3331 and is engaged in the spring retainer 3334.

[0062] The connecting part 333 covers the connecting groove 3331 and is provided with an elastic connecting plate 3335. One end of the connecting plate 3335 can abut against the first coil of the conductive spring 34, and the other end can contact the second coil of the conductive spring 34.

[0063] The bellows 31 is provided with a one-way valve assembly 37, which includes a one-way air intake valve 371 and a one-way air exhaust valve 372. The one-way air intake valve 371 and the one-way air exhaust valve 372 are located at the two ends of the bellows 31 near the connecting pipe 313, respectively. The one-way air intake valve 371 is used to inflate the inner cavity of the bellows 31 and discharge it through the one-way air exhaust valve 372.

[0064] The working principle of this embodiment is as follows:

[0065] First, the two sets of second sealing elements 3322 are respectively inserted into the annular grooves 3321 in the middle of the two sets of conductive elements 33. Then, the two sets of conductive elements 33 are inserted into the two sets of silicone rubber elements 32. The annular grooves 3321 in the middle of the conductive parts 332 cooperate with the annular blocks 321 in the silicone rubber elements 32. After the conductive elements 33 and silicone rubber elements 32 are initially assembled, the end of the conductive spring 34 is inserted into the connecting groove 3331 at the end of the connecting part 333 of a set of conductive elements 33. Then, the conductive spring 34 is rotated so that the first turn of the conductive spring 34 is screwed into the spring retaining ring 3334 in the first buckle 3332 and the second buckle 3333, and is detachably connected to a set of conductive elements 33.

[0066] Then, the assembly structure of the silicone rubber component 32, conductive component 33, and conductive spring 34 is inserted into the bellows 31 through the connecting pipe 313 on one side of the bellows 31. The silicone rubber component 32 contacts one side of the first sealing component 35 in the connecting pipe 313, and the other side of the first sealing component 35 abuts against the mounting boss 314. Then, the silicone rubber component 32 is pressed, and one side of the first sealing component 35 abuts against the silicone rubber component 32, and the other side abuts against the mounting boss 314, thereby sealing one end of the bellows 31.

[0067] Subsequently, the bellows 31 is compressed, and the end of the conductive spring 34 not connected to the conductive component 33 passes through the connecting pipe 313 on the other side of the bellows 31. Then, the end of the conductive spring 34 is inserted into the connecting groove 3331 at the end of another set of conductive components 33. Then, the set of conductive components 33 is rotated to screw the conductive spring 34 into the spring retainer 3334. Then, the set of silicone rubber components 32 is inserted into the connecting pipe 313 to compress the first sealing component 35 on this side, thereby sealing both ends of the bellows 31. Then, the limiting end cap 36 is rotated into the first connecting pipe 313, and the silicone rubber components 32 on both sides are respectively installed and fixed in the connecting pipes 313 at both ends of the bellows 31.

[0068] Then, residual air is extracted through the one-way exhaust valve 372 of the one-way valve assembly 37, and then sufficient nitrogen is introduced through the one-way intake valve 371, causing the bellows 31 to unfold naturally. Then, the connecting pipe 313 with a wedge-shaped groove on one side is inserted into the snap-fit ​​cylinder around the high-voltage terminal 12, and the wedge-shaped snap-fit ​​block in the snap-fit ​​cylinder snaps into the wedge-shaped groove, snapping the conductive connector 3 into the ignition coil 1. Then, the other side of the conductive connector 3 is inserted into the insulating sleeve 11, and then the insulating sleeve 11 is rotated, and the insulating sleeve 11 is threaded into the connecting cylinder 16, completing the assembly of the conductive connector 3 and the ignition coil 1.

[0069] The assembled ignition coil 1 is then inserted into the engine mounting cavity, and the end of the spark plug 2 is inserted into the insulating sleeve 11. The end of the spark plug 2 is inserted into the insulating sleeve 11 and into the connecting tube 313 on the side of the conductive connector 3 opposite to the high voltage terminal 12. The end of the spark plug 2 abuts against the conductive component 33 and is compressed by the bellows 31 as the ignition coil 1 is inserted. When the ignition coil 1 is installed with the engine, the elastic protrusion 18 on the outer periphery of the insulating sleeve 11 abuts against the inner wall of the mounting cavity, and the bellows 31 is axially compressed and deformed, thus completing the assembly of the car ignition device and the engine.

[0070] It should be noted that, as Figure 10 As shown, spark plug 2 is a conventional technical method, and will not be described in detail in this embodiment.

[0071] Example 2: Figure 11 , Figure 12 As shown, based on Embodiment 1, the difference between Embodiment 2 and Embodiment 1 is that the first sealing element 35 includes a sealing ring 351, a telescopic sealing section 352, and an axial sealing cylinder 353. The sealing ring 351 has an annular sealing boss 354 on one end face near the silicone rubber component 32, which can abut against the silicone rubber component 32. One end of the telescopic sealing section 352 is connected to the sealing boss 354, and the other end is connected to the circumferential sealing cylinder 353. The silicone rubber component 32 has a compression boss 322 and a connecting boss 323 at its end. The connecting boss 323 slides with the axial sealing cylinder 353. The compression boss 322 is used to compress the telescopic sealing section 352, causing the inner wall of the axial sealing cylinder 353 to have an interference fit with the outer circumference of the connecting boss 323.

[0072] The working principle of this embodiment is as follows:

[0073] First, the two sets of second sealing elements 3322 are respectively inserted into the annular grooves 3321 in the middle of the two sets of conductive elements 33. Then, the two sets of conductive elements 33 are inserted into the two sets of silicone rubber elements 32. The annular grooves 3321 in the middle of the conductive parts 332 cooperate with the annular blocks 321 in the silicone rubber elements 32. After the conductive elements 33 and silicone rubber elements 32 are initially assembled, the end of the conductive spring 34 is inserted into the connecting groove 3331 at the end of the connecting part 333 of a set of conductive elements 33. Then, the conductive spring 34 is rotated so that the first turn of the conductive spring 34 is screwed into the spring retaining ring 3334 in the first buckle 3332 and the second buckle 3333, and is detachably connected to a set of conductive elements 33.

[0074] Then, the assembly structure of the silicone rubber component 32, conductive component 33, and conductive spring 34 is inserted into the bellows 31 through the connecting pipe 313 on one side of the bellows 31. The silicone rubber component 32 contacts the first sealing component 35 on one side inside the connecting pipe 313, and the other side of the first sealing component 35 abuts against the mounting boss 314. Then, the silicone rubber component 32 is pressed, and the boss 322 is squeezed to squeeze the telescopic sealing section 352. The telescopic sealing section 352 is forced to contract inward, pushing the axial sealing cylinder 353. The inner wall of the axial sealing cylinder 353 is interference-fitted with the outer circumferential surface of the connecting ring 323 to achieve a seal on one end of the bellows 31.

[0075] Subsequently, the bellows 31 is compressed, and the end of the conductive spring 34 not connected to the conductive component 33 passes through the connecting pipe 313 on the other side of the bellows 31. Then, the end of the conductive spring 34 is inserted into the connecting groove 3331 at the end of another set of conductive components 33. Then, the set of conductive components 33 is rotated to screw the conductive spring 34 into the spring retainer 3334. Then, the set of silicone rubber components 32 is inserted into the connecting pipe 313 to compress the first sealing component 35 on this side, thereby sealing both ends of the bellows 31. Then, the limiting end cap 36 is rotated into the first connecting pipe 313, and the silicone rubber components 32 on both sides are respectively installed and fixed in the connecting pipes 313 at both ends of the bellows 31.

[0076] Then, residual air is extracted through the one-way exhaust valve 372 of the one-way valve assembly 37, and then sufficient nitrogen is introduced through the one-way intake valve 371, causing the bellows 31 to unfold naturally. Then, the connecting pipe 313 with a wedge-shaped groove on one side is inserted into the snap-fit ​​cylinder around the high-voltage terminal 12, and the wedge-shaped snap-fit ​​block in the snap-fit ​​cylinder snaps into the wedge-shaped groove, snapping the conductive connector 3 into the ignition coil 1. Then, the other side of the conductive connector 3 is inserted into the insulating sleeve 11, and then the insulating sleeve 11 is rotated, and the insulating sleeve 11 is threaded into the connecting cylinder 16, completing the assembly of the conductive connector 3 and the ignition coil 1.

[0077] The assembled ignition coil 1 is then inserted into the engine mounting cavity, and the end of the spark plug 2 is inserted into the insulating sleeve 11. The end of the spark plug 2 is inserted into the insulating sleeve 11 and into the connecting tube 313 on the side of the conductive connector 3 opposite to the high voltage terminal 12. The end of the spark plug 2 abuts against the conductive component 33 and is compressed by the bellows 31 as the ignition coil 1 is inserted. When the ignition coil 1 is installed with the engine, the elastic protrusion 18 on the outer periphery of the insulating sleeve 11 abuts against the inner wall of the mounting cavity, and the bellows 31 is axially compressed and deformed, thus completing the assembly of the car ignition device and the engine.

[0078] Example 3: Figures 13 to 15 As shown, based on Embodiment 2, the difference between Embodiment 3 and Embodiment 2 is that the bellows 31 also includes a conical telescopic cover 315 at both ends. One end of the telescopic cover 315 is connected to the connecting pipe 313, and the other end is connected to the deformation section 311.

[0079] The working principle of this embodiment is as follows:

[0080] First, the two sets of second sealing elements 3322 are respectively inserted into the annular grooves 3321 in the middle of the two sets of conductive elements 33. Then, the two sets of conductive elements 33 are inserted into the two sets of silicone rubber elements 32. The annular grooves 3321 in the middle of the conductive parts 332 cooperate with the annular blocks 321 in the silicone rubber elements 32. After the conductive elements 33 and silicone rubber elements 32 are initially assembled, the end of the conductive spring 34 is inserted into the connecting groove 3331 at the end of the connecting part 333 of a set of conductive elements 33. Then, the conductive spring 34 is rotated so that the first turn of the conductive spring 34 is screwed into the spring retaining ring 3334 in the first buckle 3332 and the second buckle 3333, and is detachably connected to a set of conductive elements 33.

[0081] Then, the assembly structure of the silicone rubber component 32, conductive component 33, and conductive spring 34 is inserted into the bellows 31 through the connecting pipe 313 on one side of the bellows 31. The silicone rubber component 32 contacts the first sealing component 35 on one side inside the connecting pipe 313, and the other side of the first sealing component 35 abuts against the mounting boss 314. Then, the silicone rubber component 32 is pressed, and the boss 322 is squeezed to squeeze the telescopic sealing section 352. The telescopic sealing section 352 is forced to contract inward, pushing the axial sealing cylinder 353. The inner wall of the axial sealing cylinder 353 is interference-fitted with the outer circumferential surface of the connecting ring 323 to achieve a seal on one end of the bellows 31.

[0082] Subsequently, the bellows 31 is compressed, and the end of the conductive spring 34 not connected to the conductive component 33 passes through the connecting pipe 313 on the other side of the bellows 31. Then, the end of the conductive spring 34 is inserted into the connecting groove 3331 at the end of another set of conductive components 33. Then, the set of conductive components 33 is rotated to screw the conductive spring 34 into the spring retainer 3334. Then, the set of silicone rubber components 32 is inserted into the connecting pipe 313 to compress the first sealing component 35 on this side, thereby sealing both ends of the bellows 31. Then, the limiting end cap 36 is rotated into the first connecting pipe 313, and the silicone rubber components 32 on both sides are respectively installed and fixed in the connecting pipes 313 at both ends of the bellows 31.

[0083] Then, residual air is extracted through the one-way exhaust valve 372 of the one-way valve assembly 37, and then sufficient nitrogen is introduced through the one-way intake valve 371, causing the bellows 31 to unfold naturally. Then, the connecting pipe 313 with a wedge-shaped groove on one side is inserted into the snap-fit ​​cylinder around the high-voltage terminal 12, and the wedge-shaped snap-fit ​​block in the snap-fit ​​cylinder snaps into the wedge-shaped groove, snapping the conductive connector 3 into the ignition coil 1. Then, the other side of the conductive connector 3 is inserted into the insulating sleeve 11, and then the insulating sleeve 11 is rotated, and the insulating sleeve 11 is threaded into the connecting cylinder 16, completing the assembly of the conductive connector 3 and the ignition coil 1.

[0084] The assembled ignition coil 1 is then inserted into the engine mounting cavity, allowing the end of the spark plug 2 to pass through the insulating sleeve 11. The end of the spark plug 2 passes through the insulating sleeve 11 and into the connecting pipe 313 on the side of the conductive connector 3 opposite to the high-voltage terminal 12. The end of the spark plug 2 abuts against the conductive component 33 and is compressed by the bellows 31 as the ignition coil 1 is inserted. The telescopic cover 315 expands outward from the center during the compression of the bellows 31, causing the deformation section 311 and the support section 312 in the middle of the bellows 31 to gradually expand outward from the center. At the same time, the deformation section 311 deforms and compresses, and the support section 312 moves axially. When the ignition coil 1 is installed with the engine, the elastic protrusion 18 on the outer periphery of the insulating sleeve 11 abuts against the inner wall of the mounting cavity, and the crest of the deformation section 311 of the bellows 31 abuts against the inner wall of the insulating sleeve 11, completing the assembly of the automotive ignition device and the engine.

[0085] It should be noted that, as Figure 16 , Figure 17 As shown, the one-way intake valve 371 and the one-way exhaust valve 372 are conventional technical means in the field of intake and exhaust, and will not be described in detail in this embodiment.

[0086] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An automobile ignition device, comprising an ignition coil and a spark plug, an insulating sleeve is arranged at one end of a high-voltage terminal of the ignition coil, and a clamping sleeve is further arranged on the outer periphery of the high-voltage terminal, characterized in that: The insulating sleeve is provided with an elastic conductive connector, the conductive connector is filled with inert gas, one end of the conductive connector is clamped with the clamping sleeve and abuts against the high-voltage terminal, the other end abuts against the terminal nut of the spark plug, the spark plug penetrates into the insulating sleeve to compress the conductive connector, the compression elastic force of the conductive connector and the compression elastic force of the inert gas jointly act on the conductive connector to make the two ends of the conductive connector abut against the high-voltage terminal and the spark plug respectively, the conductive connector comprises a bellows, two groups of silicone rubber parts, two groups of conductive parts and a conductive spring, the bellows comprises a plurality of U-shaped deformation sections and a plurality of support sections, the deformation sections and the support sections are distributed along the axial direction of the bellows alternately, the two ends of the bellows are provided with connecting pipes, the connecting pipes are provided with mounting bosses, the silicone rubber parts are arranged in the connecting pipes, the first sealing parts are arranged between the silicone rubber parts and the mounting bosses, the conductive parts are arranged in the silicone rubber parts and are in interference fit with the silicone rubber parts, the two ends of the conductive spring are clamped with the two groups of conductive parts respectively, the end of the connecting pipe is provided with a limiting end cover for limiting the silicone rubber part, the middle of the limiting end cover is provided with a limiting surrounding edge, the outer ring of the limiting end cover is threadedly connected with the connecting pipe, and the limiting surrounding edge is threadedly connected with the silicone rubber part, the bellows is provided with a one-way valve assembly, and the one-way valve assembly is used for pumping and inflating the inner cavity of the bellows.

2. The automotive ignition device of claim 1, wherein: The conductive part comprises an abutting part, a conductive part and a connecting part, the abutting part is provided with a containing groove, the conductive part is provided with an annular clamping groove in the circumferential direction, the silicone rubber part is provided with an annular clamping block, the annular clamping block is matched with the annular clamping groove, the annular clamping groove is further provided with a second sealing part, the end of the connecting part is provided with an annular connecting groove, the side wall of the annular connecting groove is provided with a plurality of arc-shaped first buckles and second buckles, the first buckle and the second buckle are matched to form a spring clamping ring, and the first ring of the end of the conductive spring penetrates into the connecting groove and is clamped into the spring clamping ring.

3. The automotive ignition device of claim 2, wherein: The connecting part covering the connecting groove is provided with an elastic connecting plate, one end of the connecting plate can abut against the first ring of the conductive spring, and the other end can contact the second ring of the conductive spring.

4. The automotive ignition device of claim 1, wherein: The two ends of the bellows further comprise a semicircular telescopic cover, one end of the telescopic cover is connected with the connecting pipe, and the other end is connected with the deformation section.

5. The automotive ignition device of claim 1, wherein: The first sealing part comprises a sealing ring, an elastic sealing section and an axial sealing cylinder, the sealing ring is provided with an annular sealing boss near the end face of one end of the silicone rubber part, the sealing boss can abut against the silicone rubber part, one end of the elastic sealing section is connected with the sealing boss, and the other end is connected with the circumferential sealing cylinder, the end of the silicone rubber part is provided with a pressing boss and a connecting boss, the connecting boss is in sliding fit with the axial sealing cylinder, and the pressing boss is used for pressing the elastic sealing section to make the inner wall of the axial sealing cylinder and the outer periphery of the connecting boss in interference fit.

6. The automotive ignition device of claim 5, wherein: The one-way valve assembly comprises a one-way air inlet valve and a one-way air outlet valve, the one-way air inlet valve and the one-way air outlet valve are respectively located at the two ends of the bellows close to the connecting pipe, the one-way air inlet valve is used for inflating the inner cavity of the bellows and discharging through the one-way air outlet valve.

7. The automotive ignition device of claim 6, wherein: The inner wall of the clamping cylinder is provided with a wedge-shaped clamping boss, the outer periphery of the connecting pipe near the high-voltage terminal of the corrugated pipe is provided with a wedge-shaped clamping ring groove, the clamping boss can penetrate into the clamping ring groove, and the assembly of the conductive connecting piece and the ignition coil is realized.

8. The automotive ignition device according to any one of claims 1 to 7, characterized in that: The ignition coil further comprises a shell, the outer side of the shell is provided with a wiring port, a plurality of wiring terminals are arranged in the wiring port, the lower side of the shell is provided with a connecting cylinder, the periphery of the connecting cylinder is provided with external threads, the end of the insulating sleeve is provided with internal threads matched with the external threads, and the insulating sleeve is in threaded connection with the connecting cylinder.

9. The automotive ignition device of claim 8, wherein: The insulating sleeve is provided with a plurality of groups of elastic blocks, each adjacent two groups of elastic blocks are distributed on the outer periphery surface of the insulating sleeve, the elastic blocks can be in interference fit with the inner wall of the mounting hole of the engine, and the outer periphery surface of the insulating sleeve near the spark plug is provided with exhaust holes.

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