Secondary winding wire passing type ignition coil

Abstract

A secondary winding wire passing type ignition coil comprises a shell, a low-voltage head is arranged on the upper portion of the shell, a high-voltage sheath 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 at the other end of the coil assembly. The coil assembly sequentially comprises an iron core, a primary framework arranged outside the iron core, a secondary framework arranged outside the primary framework and an n-shaped iron core arranged above the secondary framework from inside to outside, the top face of the n-shaped iron core is covered with an iron core cover, the bottom ends of the n-shaped iron core are connected to the two ends of the iron core respectively, and the surface of the other part of the n-shaped iron core is wrapped with plastic. As the iron core cover is additionally arranged on the upper side of the iron core assembly to cover the exposed position of the iron core, direct contact with resin is avoided, and the rest low-stress parts are covered by plastic, the internal stress is effectively improved, and the problem of resin cracking is effectively solved.

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 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 produce 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 parallel along length direction in shell, each first cavity is spaced apart from each other by first wall body, one coil assembly is installed in each first cavity;Second cavity is arranged along width direction in shell, 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 along height direction at the other end of first cavity, negative high-voltage connector is arranged in third cavity, and each negative high-voltage connector is connected with a coil assembly;Coil assembly includes T-shaped core assembly, primary framework, primary winding, secondary framework, secondary winding, C-shaped core assembly, C-shaped core assembly, magnet, T-shaped core assembly constitute complete magnetic circuit as a whole. The C-shaped core of the ignition coil of the structure is integrally sleeved with a cover, but due to the huge heat of the core as a whole, it is easy to deform and break under the action of thermal expansion and contraction, which causes direct contact with resin, and finally leads to the cracking of epoxy resin. SUMMARY

[0003] The utility model aims at providing a kind of secondary winding overline ignition coil that can effectively prevent local epoxy resin cracking.

[0004] To achieve the above purpose, the utility model employs the technical scheme of: a kind of secondary winding overline ignition coil, including shell, the upper portion of the shell is provided with low pressure head, the lower portion of the shell is installed with high voltage sheath, the inside of the shell is arranged with coil assembly along transverse direction and fills epoxy resin, the low pressure head is located at one end of coil assembly, ignition module is arranged at the other end of coil assembly, the coil assembly includes core from inside to outside, primary framework arranged at the outside of the core, secondary framework arranged at the outside of the primary framework, n-shaped core arranged above the secondary framework, wherein, the top surface of the n-shaped core is covered with core cover, the bottom end of the n-shaped core is connected to the two ends of the core respectively, and the remaining part of the surface of the n-shaped core is wrapped with plastic.

[0005] As a further improvement, the primary skeleton, the end of the secondary skeleton is provided with a slot, the n-type core of both ends inserted into the slot and connected to both ends of the core.

[0006] As a further improvement, the primary skeleton is wound with a primary winding, 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.

[0007] As a further improvement, the secondary skeleton is wound with a secondary winding, and a plurality of wire slots are arranged on the secondary skeleton at intervals, and the secondary winding is wound in the wire slots in a reciprocating manner.

[0008] As a further improvement, the secondary skeleton has a winding column, and the secondary winding is wound from the first end to the end of the secondary skeleton by a winding machine, and the end winding tail is wound on the winding column from low to high.

[0009] As a further improvement, the secondary skeleton is provided with a high-voltage diode, 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, a suppression resistor and a high-voltage pin, one end of the negative high-voltage connector is connected above the suppression resistor, and the high-voltage pin is connected below 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 through the negative high-voltage plug.

[0012] As a further improvement, the negative high-voltage plug has a elastic latch, and the other end of the negative high-voltage connector is inserted into the elastic latch in a vertical direction.

[0013] As a further improvement, the high-voltage sheath is provided with a high-voltage spring, and the high-voltage pin is connected to the upper end of the high-voltage spring.

[0014] Since the iron core assembly of the utility model increases the iron core cover to cover the exposed position of the iron core, direct contact with the resin is avoided, and the low stress part is covered with plastic, the effect of effectively improving the internal stress is achieved, and the problem of resin cracking is effectively solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACH Figure 1 is a perspective view of the secondary winding overline type ignition coil according to the utility model;

[0016] FIG. 1 is a perspective view of a primary winding over-line type ignition coil according to the present application; Figure 2 FIG. 2 is an exploded view of the primary winding over-line type ignition coil according to the present application;

[0017] FIG. 3 is a perspective view of a secondary winding over-line type ignition coil according to the present application; Figure 3 FIG. 4 is an exploded view of the secondary winding over-line type ignition coil according to the present application;

[0018] FIG. 5 is a partial enlarged view of the secondary winding over-line type ignition coil according to the present application; Figure 4 FIG. 6 is a partial enlarged view of the secondary winding over-line type ignition coil according to the present application; DETAILED DESCRIPTION

[0019] Hereinafter, terms used in the specification will be briefly described, and embodiments will be described in detail. All terms including descriptive or technical terms used herein should be interpreted to have the meanings understood by those having ordinary knowledge in the art. However, the terms can have different meanings according to the intention of those having ordinary knowledge in the art, precedents, or the emergence of new technologies.

[0020] In addition, some terms can be selected by the applicant, and in this case, the meanings of the selected terms will be described in detail in the detailed description of the embodiments. Therefore, the terms used herein must be defined based on the meanings of the terms together 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.

[0021] 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 skilled 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.

[0022] FIG. 1 is a perspective view of a primary winding over-line type ignition coil according to the present application; Figure 1 FIG. 2 is an exploded view of the primary winding over-line type ignition coil according to the present application; Figure 2The utility model discloses a secondary winding over line type ignition coil's explosion map, a secondary winding over line type ignition coil, including the shell 1, is provided with the bushing 14 for fixed installation on the shell 1. The upper portion of shell 1 is provided with low pressure head 2, and the lower portion of shell 1 is provided with high voltage sheath 3, and the inside of casing 1 is provided with coil assembly along the transverse direction and fills epoxy resin, and low pressure head 2 is located one end of coil assembly, and the other end of coil assembly is provided with ignition module 4, and coil assembly from inside to outside includes iron core 5, primary skeleton 6 for setting up in the outside of iron core 5, secondary skeleton 7 for setting up in the outside of primary skeleton 6, n type iron core 8 for setting up above secondary skeleton 7, wherein, the top surface of n type iron core 8 is covered with iron core cover 9, and the bottom end of n type iron core 8 is connected to the both ends of iron core 5 respectively, and the rest of n type iron core 8 surface is wrapped with plastic. Since the utility model discloses the iron core cover of iron core assembly upper side covers the iron core outer leakage position (herein the area is biggest and stress is biggest, and the fracture is most likely to occur), avoids directly contacting with resin, and the rest of the part low profit part adopts plastic covering, effectively improves the effect of internal stress, effectively solves the resin cracking problem.

[0023] The end of primary skeleton 6, secondary skeleton 7 is provided with the slot, and the both ends of n type iron core 8 have the outwardly inclined connecting surface, and the both ends of iron core 5 also have the outwardly inclined end face matched, and the both ends of n type iron core 8 are inserted into the slot and connected to the both ends of iron core 5. The primary winding is wound on the primary skeleton 6, and the primary connecting sheet 61 connected to the primary winding is arranged on the primary skeleton 6, and the primary connecting sheet 61 is connected to the ignition module 4.

[0024] The bottom of coil assembly is provided with negative high voltage connector 10, suppression resistance 11 and high voltage pin 12, one end of negative high voltage connector 10 is connected above suppression resistance 11, and high voltage pin 12 is connected below suppression resistance 11. High voltage spring 13 is arranged in high voltage sheath 3, and high voltage pin 12 is connected to the upper end of high voltage spring 13.

[0025] Attached Figure 3 It is the secondary skeleton of the secondary winding over line type ignition coil according to the utility model, and the secondary winding is wound on the secondary skeleton 7, and a plurality of wire slots are arranged on the secondary skeleton 7 at intervals, and the secondary winding is wound in the wire slot by reciprocating type winding flat wire.

[0026] The secondary skeleton 7 has winding column 71, and the secondary winding is wound from the first end to the end of the secondary skeleton by winding machine, and the end winding tail is wound on the winding column 71 from low to high, which simplifies the manufacturing process. High voltage diode 72 is arranged on 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 72. Negative high voltage insert sheet 73 is arranged on the secondary skeleton 7, and the negative high voltage end of the secondary winding is connected to the other end of the negative high voltage connector 10 through the negative high voltage insert sheet 73 in the vertical direction.

[0027] Appendix Figure 4 This is a partially enlarged view of the secondary frame of the secondary winding through-wire ignition coil according to this utility model. The negative high-voltage insert 73 has a flexible pin, and the other end of the negative high-voltage connector 10 is inserted vertically into the flexible pin. The flexible connection method replaces the traditional rigid compression contact, which can avoid the problem of excessive stress load and cracking of the frame.

[0028] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for limiting purposes. The description of features or aspects within each embodiment should generally be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope defined by the appended claims.

Claims

1. A secondary winding-through-wire ignition coil, characterized in that: The device includes a housing (1), a low-voltage head (2) is provided on the upper part of the housing (1), a high-voltage sheath (3) is installed on the lower part of the housing (1), a coil assembly is arranged horizontally inside the housing (1) and filled with epoxy resin, the low-voltage head (2) is located at one end of the coil assembly, and an ignition module (4) is provided at the other end of the coil assembly. The coil assembly includes, from the inside to the outside, an iron core (5), a primary frame (6) provided outside the iron core (5), a secondary frame (7) provided outside the primary frame (6), and an n-type iron core (8) provided above the secondary frame (7). The top surface of the n-type iron core (8) is covered with an iron core cover (9), the bottom end of the n-type iron core (8) is connected to both ends of the iron core (5), and the remaining part of the n-type iron core (8) is wrapped with plastic.

2. The secondary winding through-wire ignition coil according to claim 1, characterized in that: The primary skeleton (6) and the secondary skeleton (7) are provided with slots at their ends, and the two ends of the n-type iron core (8) are inserted into the slots and connected to the two ends of the iron core (5).

3. The secondary winding through-wire ignition coil according to claim 1, characterized in that: A primary winding is wound on the primary skeleton (6), and a primary connecting piece (61) connected to the primary winding is provided on the primary skeleton (6), and the primary connecting piece (61) is connected to the ignition module (4).

4. The secondary winding through-wire ignition coil according to claim 1, characterized in that: The secondary skeleton (7) is wound with secondary windings, and the secondary skeleton (7) is provided with a plurality of wire grooves at intervals. The secondary windings are reciprocated and flatly stacked in the wire grooves.

5. The secondary winding through-wire ignition coil according to claim 4, characterized in that: The secondary skeleton (7) has a winding post (71). The secondary winding is wound from the first end of the secondary skeleton to the end by a winding machine, and the end winding tail is wound on the winding post (71) from low to high.

6. The secondary winding through-wire ignition coil according to claim 4, characterized in that: A high-voltage diode (72) is provided on the secondary frame (7), and the positive high-voltage end of the secondary winding is connected to the ignition module (4) through the high-voltage diode (72).

7. The secondary winding through-wire ignition coil according to claim 6, characterized in that: The bottom of the coil assembly is provided with a negative high voltage connector (10), a suppression resistor (11), and a high voltage pin (12). One end of the negative high voltage connector (10) is connected above the suppression resistor (11), and the high voltage pin (12) is connected below the suppression resistor (11).

8. The secondary winding through-wire ignition coil according to claim 7, characterized in that: The secondary frame (7) is provided with a negative high voltage plug (73), and the negative high voltage end of the secondary winding is connected to the other end of the negative high voltage connector (10) in a vertical direction through the negative high voltage plug (73).

9. The secondary winding through-wire ignition coil according to claim 8, characterized in that: The negative high voltage plug (73) has an elastic pin, and the other end of the negative high voltage connector (10) is inserted into the elastic pin in the vertical direction.

10. The secondary winding through-wire ignition coil according to claim 9, characterized in that: The high-pressure sheath (3) is provided with a high-pressure spring (13), and the high-pressure pin (12) is connected to the upper end of the high-pressure spring (13).

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