Natural gas 24V system engine ignition coil

Abstract

A natural gas 24V system engine ignition coil comprises a shell and a high-voltage sheath assembly arranged at the bottom of the shell, a low-voltage head is installed on the shell, and a coil assembly and an ignition module are arranged in the shell. The coil assembly comprises a T-shaped iron core, a primary framework arranged outside the T-shaped iron core in a sleeving mode, a secondary framework arranged on the primary framework in a sleeving mode, a first C-shaped iron core, a second C-shaped iron core and a buffer connecting block, the first C-shaped iron core and the second C-shaped iron core are arranged outside the secondary framework in a surrounding mode, and the first C-shaped iron core and the second C-shaped iron core are wrapped with a thermoplastic elastic buffer cover. The first C-shaped iron core and the second C-shaped iron core are combined together at one end of the secondary framework, and when the buffer connecting block is inserted into the shell in the longitudinal direction, the buffer connecting block pushes the coil assembly to be in a circuit conduction state in the horizontal direction and the vertical direction, and the buffer connecting block is combined with the first C-shaped iron core and the second C-shaped iron core at the other end of the secondary framework. The ignition coil is reliable in structure and can be quickly assembled, and the stability of the ignition coil is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of ignition coil structure. BACKGROUND

[0002] In automobile engine ignition system, ignition coil is a kind of executive component for providing ignition energy for igniting air and fuel mixture in engine cylinder. It is a kind of special pulse booster based on electromagnetic induction principle, it makes 8-16V low voltage according to set frequency on-off and makes 20-40KV voltage of secondary to generate electric spark through spark plug. And based on the ignition coil of natural gas engine, there are some differences compared with the structure of traditional ignition coil. For example, the utility model patent with publication number CN217008906 U discloses a kind of natural gas ignition coil, including coil head and connecting rod part, coil head includes shell, coil winding is provided in shell, coil winding includes primary coil, secondary coil and iron core, secondary coil is encircled in the outside of primary coil;One side of shell is provided with plug connector, plug connector is connected with the incoming line end of primary coil, the side of shell perpendicular to plug connector is provided with extension interface, connecting rod part is connected with extension interface;Extension interface is provided with connecting terminal, the side of connecting terminal close to coil winding is provided with elastic component, the base of elastic component is oppositely provided with inwardly bent spring sheet, output needle is provided on secondary coil, output needle is inserted between spring sheet;The end of connecting rod part away from coil head is provided with spark plug, connecting rod part is provided with high-voltage terminal post connected with connecting terminal and spark plug. The structure of this kind of ignition coil is simple, easy to install, but cannot solve the problem of resin cracking caused by large energy density. SUMMARY

[0003] The utility model aims at providing a kind of ignition coil of brand-new structure, it has modular structure, can realize modern high-speed assembly.

[0004] In order to achieve the above object, the utility model adopts the technical scheme: a natural gas 24V system engine ignition coil, including shell and setting high voltage sheath subassembly in the bottom of shell, install low pressure head on shell, coil subassembly and ignition module are provided in shell, coil subassembly includes T type core, primary skeleton of setting in the outside of T type core, secondary skeleton of setting on primary skeleton, first C type core and second C type core of surrounding setting in the outside of secondary skeleton and a buffer connecting block, the outside of first C type core and second C type core is wrapped thermoplasticity elastic buffer cover, first C type core and second C type core are combined together in one end of secondary skeleton, when buffer connecting block is inserted in the shell along longitudinal direction, buffer connecting block promotes coil subassembly to circuit conduction state in horizontal direction and vertical direction, with first C type core and second C type core are combined together in the other end of secondary skeleton and form a U shape buffer zone and reduce internal stress.

[0005] As a further improvement, the top of the thermoplasticity elastic buffer cover of the first C type core and the second C type core forms a plurality of first grooves spaced apart from each other.

[0006] As a further improvement, the upper part of the buffer connecting block is convex in the horizontal direction to form a second groove.

[0007] As a further improvement, when the first C type core and the second C type core are combined together, the first groove and the second groove are in the same plane.

[0008] As a further improvement, the high voltage sheath subassembly includes a silicone rubber part at the upper part and a polytetrafluoroethylene part at the lower part, a high voltage spring is arranged in the high voltage sheath subassembly, and a rubber ring is arranged at the lower end of the high voltage spring.

[0009] As a further improvement, the primary skeleton is provided with a first primary connecting piece and a second primary connecting piece, and a primary winding connected to the first primary connecting piece and the second primary connecting piece is wound on the primary skeleton, when the buffer connecting block is inserted into the shell in the longitudinal direction, the buffer connecting block pushes the first primary connecting piece and the second primary connecting piece of the primary skeleton to be connected to the ignition module in the horizontal direction.

[0010] As a further improvement, the secondary skeleton is provided with a high-voltage diode and a negative high-voltage plug, the secondary skeleton is wound with a secondary winding, the secondary winding is connected to the high-voltage diode and the negative high-voltage plug, when the buffer connecting block is inserted into the shell in the longitudinal direction, the buffer connecting block pushes the high-voltage diode of the secondary skeleton to be connected to the ignition module in the horizontal direction.

[0011] As a further improvement, the bottom of the coil assembly is provided with a negative high-voltage connector, a suppression resistor, and a suppression resistor connecting cap, the suppression resistor is connected to the upper end of the high-voltage spring through the suppression resistor connecting cap, and the negative high-voltage connector is connected above the suppression resistor, when the buffer connecting block is inserted into the shell in the longitudinal direction, the buffer connecting block pushes the negative high-voltage plug of the secondary skeleton to be connected to the negative high-voltage connector in the vertical direction.

[0012] As a further improvement, the thermoplastic elastomer buffer cover is provided with a grounding plug, when the buffer connecting block is inserted into the shell in the longitudinal direction, the buffer connecting block pushes the grounding plug of the thermoplastic elastomer buffer cover to be connected to the ignition module in the horizontal direction.

[0013] As a further improvement, the top surface of the T-shaped core is adsorbed together with the first C-shaped core and the second C-shaped core through a magnetic sheet.

[0014] Due to the design of the buffer connecting block, the structure is more reliable, and rapid assembly can be realized; in addition, the design of the resin containing groove greatly reduces the risk of cracking of the filling material (epoxy resin) under cold and hot temperature changes, and improves the stability of the ignition coil. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACHED Figure 1 It is a perspective view of a natural gas 24V system engine ignition coil according to the utility model;

[0016] ATTACHED Figure 2 It is an explosion diagram of a natural gas 24V system engine ignition coil according to the utility model;

[0017] ATTACHED Figure 3 It is an explosion diagram of a coil assembly of a natural gas 24V system engine ignition coil according to the utility model. DETAILED DESCRIPTION

[0018] Hereinafter, the terms used in the specification will be briefly described, and the embodiments will be described in detail. All terms used herein, including descriptive terms or technical terms, should be interpreted to have the meanings understood by those of ordinary skill in the art. However, the terms can have different meanings according to the intention of those of ordinary skill in the art, precedents, or the emergence of new technology.

[0019] In addition, some terms can be selected by the applicant, and in this case, the meaning of the selected term will be described in detail in the detailed description of the embodiments. Therefore, the terms used herein must be defined based on the meaning of the terms along with the description in the entire specification. In addition, when a part "includes" or "comprises" an element, unless there is a specific description contrary thereto, the part can further include other elements, not excluding the other elements. In the following description, terms such as "component" and "module" indicate a unit for processing at least one function or operation, wherein the unit and module can be implemented as hardware or software or by combining hardware and software.

[0020] Embodiments will now be described more fully with reference to the accompanying drawings. Embodiments, however, can be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the disclosure will be thorough and complete, and will fully convey the concept of the embodiments to those of ordinary skill in the art. In the following description, well-known functions or constructions are not described in detail because they would obscure the embodiments with unnecessary detail and, throughout the specification, like reference numerals refer to like elements throughout the specification.

[0021] FIG. 1 is a perspective view of a natural gas 24V system engine ignition coil according to the present application. Figure 1 FIG. 1 is a perspective view of a natural gas 24V system engine ignition coil according to the present application. Figure 2 FIG. 1 is a perspective view of a natural gas 24V system engine ignition coil according to the present application.

[0022] FIG. 1 is a perspective view of a natural gas 24V system engine ignition coil according to the present application. Figure 3The utility model discloses a natural gas 24V system engine ignition coil's coil assembly's explosion map according to the utility model. Coil assembly 4 includes powder metallurgy press forming's T type core 41, the primary skeleton 42 of setting in the outside of T type core 41, the secondary skeleton 43 of setting on the primary skeleton 42, the first C type core 441 and the second C type core 442 of surrounding setting in the outside of secondary skeleton 43 and a buffer connecting block 45, the outside of first C type core 441 and second C type core 442 is wrapped thermoplasticity elastic buffer cover 46, and first C type core 441 and second C type core 442 are combined together at one end of secondary skeleton 43, when buffer connecting block 45 is inserted into shell 1 along the longitudinal direction, buffer connecting block 45 pushes coil assembly 4 to the circuit conduction state in horizontal direction and vertical direction, and is combined together with first C type core 441 and second C type core 442 at the other end of secondary skeleton 43 and forms a U-shaped buffer zone. The top surface of T type core 41 and first C type core and second C type core are adsorbed together through a magnetic sheet 47, since the ignition temperature of natural gas is higher than that of gasoline, the flame propagation speed is slower than that of gasoline, and the ignition coil needs to provide higher output energy, and the magnetic sheet 47 (using permanent magnet material) can increase the energy storage of the primary coil, so that the ignition coil has higher output voltage and energy.

[0023] The top of the thermoplasticity elastic buffer cover 46 of the first C type core 441 and the second C type core 442 respectively forms a plurality of first grooves 461 spaced apart from each other, for relieving internal stress of the epoxy resin; the upper part of the buffer connecting block 45 is protruded in the horizontal direction to form a second groove 451, for relieving internal stress of the epoxy resin; when the first C type core 441 and the second C type core 442 are combined together, the first grooves 461 and the second groove 451 are in the same plane, so that the risk of cracking of the filling material (epoxy resin) is greatly reduced under the condition of cold and hot temperature change, and the stability of the ignition coil is improved.

[0024] The primary skeleton 42 is provided with a first primary connecting piece 421 and a second primary connecting piece 422, and the primary skeleton 42 is wound with a primary winding connected to the first primary connecting piece 421 and the second primary connecting piece 422, when the buffer connecting block 45 is inserted into the shell 1 along the longitudinal direction, the protruding second groove (451) part of the buffer connecting block 45 pushes the first primary connecting piece 421 and the second primary connecting piece 422 of the primary skeleton 42 to be connected to the ignition module 5 in the horizontal direction.

[0025] The high-voltage diode 431 and the negative high-voltage plug 432 are arranged on the secondary skeleton 43, and the secondary winding is wound on the secondary skeleton 43, and the secondary winding is connected to the high-voltage diode 431 and the negative high-voltage plug 432. When the buffer connecting block 45 is longitudinally inserted into the shell 1, the second groove (451) of the buffer connecting block 45 pushes the high-voltage diode 431 of the secondary skeleton 43 to be connected to the ignition module 5 in the horizontal direction.

[0026] The bottom of the coil assembly 4 is provided with a negative high-voltage connector 8, a suppression resistor 9 for EMC noise filtering, and a suppression resistor connecting cap 10. The suppression resistor 9 is connected to the upper end of the high-voltage spring 6 through the suppression resistor connecting cap 10, and the negative high-voltage connector 8 is connected above the suppression resistor 9. When the buffer connecting block 45 is longitudinally inserted into the shell 1, the buffer connecting block 45 moves the secondary skeleton 43 downward, so that the negative high-voltage plug 432 is connected to the negative high-voltage connector 8 in the vertical direction.

[0027] The thermoplastic elastic buffer cover 46 is provided with a grounding plug 462, which reduces the internal interference to the coil caused by the size tolerance variation of the iron core. When the buffer connecting block 45 is longitudinally inserted into the shell 1, the second groove (451) of the buffer connecting block 45 pushes the grounding plug 462 of the thermoplastic elastic buffer cover 46 to be connected to the ignition module 5 in the horizontal direction.

[0028] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as being applicable to other similar features or aspects in other embodiments. While one or more embodiments have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details can be made therein without departing from the spirit and scope as defined by the following claims.

Claims

1. An ignition coil for a natural gas 24V system engine, characterized in that: The device includes a housing (1) and a high-voltage sheath assembly (2) disposed at the bottom of the housing (1). A low-voltage head (3) is mounted on the housing (1). A coil assembly (4) and an ignition module (5) are disposed inside the housing (1). The coil assembly (4) includes a T-shaped iron core (41), a primary frame (42) sleeved on the outside of the T-shaped iron core (41), a secondary frame (43) sleeved on the primary frame (42), a first C-shaped iron core (441) and a second C-shaped iron core (442) surrounding the outside of the secondary frame (43), and a buffer connecting block (45). The first C-shaped iron core (441) and the second C-shaped iron core (442) are wrapped with a thermoplastic elastic buffer cover (46). The first C-shaped iron core (441) and the second C-shaped iron core (442) are combined together at one end of the secondary frame (43). When the buffer connecting block (45) is inserted longitudinally into the outer shell (1), the buffer connecting block (45) pushes the coil assembly (4) to the circuit conduction state in the horizontal and vertical directions, and combines with the first C-shaped iron core (441) and the second C-shaped iron core (442) at the other end of the secondary frame (43) to form a U-shaped buffer.

2. The ignition coil for a 24V natural gas system engine according to claim 1, characterized in that: The top of the thermoplastic elastic buffer cover (46) of the first C-type iron core (441) and the second C-type iron core (442) each forms a plurality of mutually spaced first grooves (461).

3. The ignition coil for a 24V natural gas system engine according to claim 2, characterized in that: The upper part of the buffer connecting block (45) protrudes in the horizontal direction to form a second groove (451).

4. The ignition coil for a 24V natural gas system engine according to claim 3, characterized in that: When the first C-type iron core (441) and the second C-type iron core (442) are combined together, the first groove (461) and the second groove (451) are in the same plane.

5. The ignition coil for a 24V natural gas system engine according to claim 1, characterized in that: The high-voltage sheath assembly (2) includes an upper silicone rubber part and a lower polytetrafluoroethylene part. A high-voltage spring (6) is provided inside the high-voltage sheath assembly (2), and a rubber ring (7) is provided at the lower end of the high-voltage spring (6).

6. The ignition coil for a 24V natural gas system engine according to claim 1, characterized in that: The primary frame (42) is provided with a first primary connecting piece (421) and a second primary connecting piece (422). The primary frame (42) is wound with primary windings connected to the first primary connecting piece (421) and the second primary connecting piece (422). When the buffer connecting block (45) is inserted into the outer shell (1) longitudinally, the buffer connecting block (45) pushes the first primary connecting piece (421) and the second primary connecting piece (422) of the primary frame (42) to connect to the ignition module (5) in the horizontal direction.

7. The ignition coil for a 24V natural gas system engine according to claim 1, characterized in that: The secondary frame (43) is provided with a high voltage diode (431) and a negative high voltage plug (432). The secondary frame (43) is wound with a secondary winding, which is connected to the high voltage diode (431) and the negative high voltage plug (432). When the buffer connection block (45) is inserted into the housing (1) longitudinally, the buffer connection block (45) pushes the high voltage diode (431) of the secondary frame (43) to connect to the ignition module (5) in the horizontal direction.

8. The ignition coil for a 24V natural gas system engine according to claim 5, characterized in that: The bottom of the coil assembly (4) is provided with a negative high voltage connector (8), a suppression resistor (9), and a suppression resistor connector (10). The suppression resistor (9) is connected to the upper end of the high voltage spring (6) through the suppression resistor connector (10). The negative high voltage connector (8) is connected above the suppression resistor (9). When the buffer connector (45) is inserted longitudinally into the outer shell (1), the buffer connector (45) pushes the negative high voltage insert (432) of the secondary frame (43) to be pin-connected to the negative high voltage connector (8) in the vertical direction.

9. The ignition coil for a 24V natural gas system engine according to claim 1, characterized in that: The thermoplastic elastic buffer cover (46) is provided with a grounding insert (462). When the buffer connecting block (45) is inserted longitudinally into the outer shell (1), the buffer connecting block (45) pushes the grounding insert (462) of the thermoplastic elastic buffer cover (46) to connect to the ignition module (5) in the horizontal direction.

10. The ignition coil for a 24V natural gas system engine according to claim 1, characterized in that: The top surface of the T-shaped iron core (41) is attracted to the first C-shaped iron core (441) and the second C-shaped iron core (442) by a magnetic sheet (47).

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