Ignition coil with unequal-thickness iron core structure

Abstract

An ignition coil of a non-equal-thickness iron core structure comprises a shell, a low-voltage head is arranged on the upper portion of the shell, a high-voltage sheath assembly is installed on the lower portion of the shell, a coil assembly is transversely arranged in the shell and filled with epoxy resin, the low-voltage head is located at one end of the coil assembly, and an ignition module is arranged in the shell and close to the low-voltage head. 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 outside the primary framework in a sleeving mode, a first C-shaped iron core and a second C-shaped iron core, 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 oppositely combined together to form an O shape and are connected to the end of the T-shaped iron core. The thickness of the first C-shaped iron core and the thickness of the second C-shaped iron core are larger than that of the T-shaped iron core. As the C-shaped iron core assembly and the T-shaped iron core are of a non-equal-thickness structure, the T-shaped iron core is thin, so that the space of primary and secondary framework structures on the periphery of the iron core is saved, and the requirement for the electrical performance function of the coil is met.

Description

TECHNICAL FIELD

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

[0002] In automobile engine ignition system, ignition coil is a kind of executive component for providing ignition energy for igniting the 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 make 20-40KV voltage in secondary to generate electric spark through spark plug. The utility model patent with publication number CN206363872U discloses a kind of ignition coil circuit structure, a kind of combined single cylinder independent ignition coil, including shell, multiple first cavities are arranged in length direction and parallel in the shell, each first cavity is spaced apart from each other by first wall body, a coil assembly is installed in each first cavity;Second cavity is arranged in the shell along the width direction, second cavity is located at one end of first cavity, multiple low-voltage cards are arranged between first cavity and second cavity, each low-voltage card is connected with a coil assembly, circuit module is arranged in second cavity, and circuit module is electrically connected with low-voltage card;Multiple third cavities are arranged in the other end of first cavity along the height direction, negative high-voltage connector is arranged in third cavity, and each negative high-voltage connector is connected with a coil assembly;The coil assembly includes T-shaped core assembly, primary skeleton, primary winding, secondary skeleton, secondary winding, C-shaped core assembly, C-shaped core assembly, magnet, T-shaped core assembly constitute the magnetic circuit as a whole. The thickness of the C-shaped core of the ignition coil of the structure is the same as the thickness of the T-shaped core, so that the space of the primary skeleton and the secondary skeleton is cramped, and more winding turns are limited. SUMMARY

[0003] The utility model aims at providing a kind of non-equal-thickness iron core structure ignition coil with the advantage of saving the structure space of primary and secondary skeleton outside iron core periphery.

[0004] In order to achieve the above-mentioned purpose, the utility model employs the technical scheme of: a kind of non-equal-thickness iron core structure ignition coil, including shell, the upper part of the shell is provided with low pressure head, the lower part of the shell is installed with high voltage sheath assembly, the inside of the shell is arranged with coil assembly along the transverse direction and filled with epoxy resin, the low pressure head is located at one end of coil assembly, the inside of the shell is provided with ignition module close to the low pressure head, the coil assembly includes T-shaped core, primary skeleton sleeved outside the T-shaped core, secondary skeleton sleeved outside the primary skeleton, first C-shaped core and second C-shaped core arranged around the outside of the secondary skeleton, the first C-shaped core and the second C-shaped core are combined together to form O shape and connected to the end of the T-shaped core, the thickness of the first C-shaped core and the second C-shaped core is greater than the thickness of the T-shaped core.

[0005] As a further improvement, the surface of the first C-shaped core and the second C-shaped core is coated.

[0006] As a further improvement, the top surface of the T-shaped core is attracted together with the first C-shaped core and the second C-shaped core through a magnetic sheet.

[0007] As a further improvement, the primary winding is wound on the primary skeleton, the primary skeleton is provided with a primary connecting piece connected to the primary winding, and the primary connecting piece is connected to the ignition module.

[0008] As a further improvement, the secondary winding is wound on the secondary skeleton, a plurality of wire slots are arranged at intervals on the secondary skeleton, and the secondary winding is flatly and orderly wound in the wire slots in a reciprocating manner.

[0009] As a further improvement, the secondary skeleton is provided with a high-voltage diode, the high-voltage diode is located on the low-voltage side of the secondary skeleton, and the positive high-voltage end of the secondary winding is connected to the ignition module through the high-voltage diode.

[0010] As a further improvement, the bottom of the coil assembly is provided with a negative high-voltage connector and a suppression resistor, one end of the negative high-voltage connector is connected above the suppression resistor.

[0011] As a further improvement, the secondary skeleton is provided with a negative high-voltage plug, and the negative high-voltage end of the secondary winding is connected to the other end of the negative high-voltage connector in a vertical direction in a bayonet type.

[0012] As a further improvement, the high-voltage sheath assembly comprises a high-voltage rod, a cylinder cover sealing ring connected to the upper end of the high-voltage rod, and a high-voltage sheath connected to the lower end of the high-voltage rod.

[0013] As a further improvement, the high-voltage spring is connected below the suppression resistor.

[0014] Since the C-shaped core assembly and the T-shaped core of the utility model are non-equal-thickness structures, the T-shaped core is thin, which is beneficial to save the structure space of the primary and secondary skeletons outside the core, and meets the functional requirements of the coil electrical performance. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACHMENT Figure 1 is a perspective view of the ignition coil according to the non-equal-thickness core structure of the utility model;

[0016] ATTACHMENT Figure 2It is an exploded view of the ignition coil with a non-equal-thickness iron core structure according to the utility model. DETAILED DESCRIPTION

[0017] 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 as having the meaning understood by a person having ordinary knowledge in the art. However, these terms can have different meanings according to the intention of a person having ordinary knowledge in the art, precedents, or the emergence of new technology.

[0018] 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 component "includes" or "comprises" an element, unless there is a specific description contrary thereto, the component 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.

[0019] 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 a person having ordinary knowledge 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.

[0020] ATTACHMENT Figure 1 It is a perspective view of the ignition coil with a non-equal-thickness iron core structure according to the utility model; ATTACHMENT Figure 2 It is an exploded view of the ignition coil with a non-equal-thickness iron core structure according to the utility model. The ignition coil with a non-equal-thickness iron core structure includes a housing 1, and a bushing 14 for fixed installation is provided on the housing 1. A low-pressure head 2 is provided on the upper portion of the housing 1, and a high-pressure sheath assembly 3 is installed on the lower portion of the housing 1. A coil assembly is arranged in the housing 1 in the transverse direction and filled with epoxy resin, the low-pressure head 2 is located at one end of the coil assembly, and a ignition module 4 is provided inside the housing 1 adjacent to the low-pressure head 2.

[0021] The coil assembly comprises a T-shaped core 5, a primary skeleton 6 sleeved outside the T-shaped core 5, a secondary skeleton 7 sleeved outside the primary skeleton 6, a first C-shaped core 8 and a second C-shaped core 9 arranged outside the secondary skeleton 7, the first C-shaped core 8 and the second C-shaped core 9 are combined together to form an O-shaped structure and are connected to the end of the T-shaped core 5, the first C-shaped core 8, the second C-shaped core 9 and the T-shaped core 5 are all made of silicon steel sheets and have the same stacking direction, the thickness of the first C-shaped core 8 and the second C-shaped core 9 is greater than that of the T-shaped core 5, and the top surface of the T-shaped core 5 is adsorbed together with the first C-shaped core 8 and the second C-shaped core 9 through a magnetic sheet 10.

[0022] The surfaces of the first C-shaped core 8 and the second C-shaped core 9 are coated with rubber, and the material is selected to be a high-molecular material with rubber elasticity, high elasticity, high strength, high resilience and other excellent properties to meet the requirement of reducing internal stress.

[0023] The primary skeleton 6 is wound with a primary winding, the primary skeleton 6 is provided with a primary connecting piece connected to the primary winding, and the primary connecting piece is connected to the ignition module 4.

[0024] The secondary skeleton 7 is provided with a high-voltage diode 71, the lead wire of the high-voltage diode 71 is arranged in the secondary skeleton according to the secondary winding requirement, and the subsequent assembly process is simplified. The high-voltage diode 71 is located at the low-voltage side of the secondary skeleton 7, and the positive high-voltage end of the secondary winding is connected to the ignition module 4 through the high-voltage diode 71. The bottom of the coil assembly is provided with a negative high-voltage connecting head 11 and a suppression resistor 12, one end of the negative high-voltage connecting head 11 is connected above the suppression resistor 12. The secondary skeleton 7 is provided with a negative high-voltage plug 72, and the negative high-voltage end of the secondary winding is connected to the other end of the negative high-voltage connecting head 11 in the vertical direction by the negative high-voltage plug 72.

[0025] The high-voltage sheath assembly 3 comprises a high-voltage rod 31, a cylinder cover sealing ring 32 connected to the upper end of the high-voltage rod 31, and a high-voltage sheath 33 connected to the lower end of the high-voltage rod 31. The high-voltage rod 31 is provided with a high-voltage spring 13 connected below the suppression resistor 12.

[0026] It is to be understood that the embodiments described herein are to 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 attached figures, it will be apparent to 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. A non-uniform core structure ignition coil characterized by: The utility model provides a high voltage ignition coil, including shell (1), the upper portion of shell (1) is provided with low pressure head (2), the lower portion of shell (1) is installed with high voltage sheath subassembly (3), the inside of shell (1) is arranged with coil subassembly along the transverse direction and fills epoxy resin, low pressure head (2) is located one end of coil subassembly, the inside of shell (1) is closely arranged with ignition module (4) to low pressure head (2), coil subassembly includes T type core (5), the primary framework (6) of setting in T type core (5) outside, the secondary framework (7) of setting in primary framework (6) outside, first C type core (8) and second C type core (9) are around and are set in the secondary framework (7) outside, first C type core (8) and second C type core (9) are combined together and form O shape to the end of T type core (5) in opposite, the thickness of first C type core (8) and second C type core (9) is greater than the thickness of T type core (5).

2. The non-uniform core structure ignition coil according to claim 1, characterized by: The surface of the first C type core (8) and the second C type core (9) is glued.

3. The non-uniform core structure ignition coil according to claim 1, characterized by: The top surface of the T type core (5) is adsorbed together with the first C type core (8) and the second C type core (9) through a magnetic sheet (10).

4. The non-uniform core structure ignition coil according to claim 1, characterized by: The primary winding is wound on the primary framework (6), the primary framework (6) is provided with a primary connecting piece connected to the primary winding, and the primary connecting piece is connected to the ignition module (4).

5. The non-uniform core structure ignition coil of claim 1, wherein: The secondary winding is wound on the secondary framework (7), a plurality of wire slots are arranged on the secondary framework (7) at intervals, and the secondary winding is arranged in the wire slots in a reciprocating winding flat stacking manner.

6. The non-uniform core structure ignition coil according to claim 5, characterized by: The secondary framework (7) is provided with a high-voltage diode (71), the high-voltage diode (71) is located on the low-voltage side of the secondary framework (7), and the positive high-voltage end of the secondary winding is connected to the ignition module (4) through the high-voltage diode (71).

7. The non-uniform core structure ignition coil according to claim 6, characterized by: The bottom of the coil subassembly is provided with a negative high-voltage connector (11) and a suppression resistor (12), one end of the negative high-voltage connector (11) is connected above the suppression resistor (12).

8. The non-uniform core structure ignition coil according to claim 7, characterized by: The secondary framework (7) is provided with a negative high-voltage plug (72), and the negative high-voltage end of the secondary winding is connected to the other end of the negative high-voltage connector (11) in a vertical direction in a vertical direction.

9. The non-uniform core structure ignition coil of claim 8, wherein: The high-voltage sheath subassembly (3) includes a high-voltage rod (31), a cylinder cover sealing ring (32) connected to the upper end of the high-voltage rod (31), and a high-voltage sheath (33) connected to the lower end of the high-voltage rod (31).

10. The non-uniform core structure ignition coil of claim 9, wherein: The high-voltage spring (13) is connected below the suppression resistor (12).

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