Partition resin application type ignition coil

Abstract

A partition resin application 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 in the shell and close to the low-voltage head. The coil assembly sequentially comprises a C-shaped iron core, a primary framework arranged on one supporting arm of the C-shaped iron core, a secondary framework arranged outside the primary framework and an I-shaped iron core connected between the two ends of the C-shaped iron core from inside to outside, the other supporting arm of the C-shaped iron core is covered with a rubber cover, and the surface of the other part of the C-shaped iron core is wrapped with plastic. And the outline of the rubber cover is matched with that of the secondary framework. The effect of internal stress is effectively improved, resin on the upper side of the secondary framework is effectively separated, and the problems that the resin is distributed too thick, and the resin cracks in the application process can be 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, a 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;The 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 application type ignition coil of cut-off resin, which can effectively prevent local epoxy resin cracking.

[0004] To achieve the above purpose, the utility model employs the technical scheme of: an application type ignition coil of cut-off resin, comprising a shell, a low-pressure head is arranged on the upper part of the shell, a high-voltage sheath is mounted on the lower part of the shell, a coil assembly is arranged in the shell along the transverse direction and filled with epoxy resin, the low-pressure head is located at one end of the coil assembly, an ignition module is arranged adjacent to the low-pressure head in the shell, the coil assembly comprises a C-shaped core, a primary framework arranged on one arm of the C-shaped core, a secondary framework arranged outside the primary framework, an I-shaped core connected between the two ends of the C-shaped core, from inside to outside, the other arm of the C-shaped core is covered with a rubber cover, the remaining part of the C-shaped core is wrapped with plastic, and the contour of the rubber cover matches the contour of the secondary framework.

[0005] As a further improvement, the bottom of the rubber cover extends to both sides and covers the secondary skeleton.

[0006] As a further improvement, the C-shaped core and the I-shaped core are adsorbed together through a magnetic sheet.

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

[0008] As a further improvement, the secondary skeleton is wound with a secondary winding, the secondary skeleton is provided with a plurality of wire slots at intervals, and the secondary winding is wound in a reciprocating manner and is flat and stacked in the wire slots.

[0009] As a further improvement, the secondary skeleton is provided with a high-voltage diode, and a 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 a 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 plug, and the other end of the negative high-voltage connector is inserted into the elastic plug 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 C-shaped core is provided with a core cover on the upper side to cover the exposed position of the 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, the resin on the upper side of the secondary skeleton is effectively separated, and the phenomenon of resin cracking during application can be solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACH Figure 1 is a perspective view of the resin application type ignition coil according to the present application;

[0016] ATTACHFigure 2 is a sectional view of the resin application type ignition coil according to the present utility model;

[0017] attached Figure 3 is a sectional view of the resin application type ignition coil according to the present utility model;

[0018] attached Figure 4 is a sectional view of the resin application type ignition coil according to the present utility model; DETAILED DESCRIPTION

[0019] 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, these terms can have different meanings according to the intention of those of ordinary skill in the art, precedents, or the emergence of new technology.

[0020] 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.

[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] attached Figure 1 is a sectional view of the resin application type ignition coil according to the present utility model; Figure 2 is a sectional view of the resin application type ignition coil according to the present utility model; Figure 3The utility model discloses a sectional view of the ignition coil of the resin application type is cut off, and a resin application type ignition coil is cut off, which comprises a shell 1, and a bushing 14 for fixed installation is arranged on the shell 1. The upper portion of the shell 1 is provided with a low pressure head 2, and the lower portion of the shell 1 is provided with a high pressure sheath 3. A coil assembly is arranged in the shell 1 in a 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 is arranged in the shell 1 close to the low pressure head 2.

[0023] The coil assembly comprises, from inside to outside, a C-shaped core 4, a primary framework 5 arranged on one arm of the C-shaped core 4, a secondary framework 6 arranged outside the primary framework 5, an I-shaped core 7 connected between both ends of the C-shaped core 4, a rubber cover 8 covering the other arm of the C-shaped core 4, and the remaining part of the C-shaped core 4 is injection molded with a high molecular material, thereby reducing the manual assembly process and improving product consistency. The profile of the rubber cover 8 matches the profile of the secondary framework 6, so that the resin on the upper side of the secondary framework is effectively separated, and the problem of resin distribution being too thick and resin cracking during application can be solved.

[0024] The bottom of the rubber cover 8 extends to both sides and covers above the secondary framework 6. The core cover material is selected to be a high molecular material with rubber elasticity, high elasticity, high strength, and high resilience, which can meet the requirement of reducing internal stress. Since the core cover covers the core leakage position on the upper side of the core assembly in the utility model (which has the largest area and the largest stress and is most prone to breakage), direct contact with the resin is avoided, and the remaining parts are covered with plastic, which effectively improves the effect of internal stress and solves the problem of resin cracking.

[0025] The end of the primary framework 6 is provided with a slot, the I-shaped core 7 is inserted into the slot, and the C-shaped core 4 and the I-shaped core 7 are adsorbed together through a magnetic sheet 12. The primary framework 5 is wound with a primary winding, and the primary framework 5 is provided with a primary connecting sheet 51 connected to the primary winding, and the primary connecting sheet 51 is connected to the ignition module.

[0026] The bottom of the coil assembly is provided with a negative high-voltage connector 9, a suppression resistor 10, and a high-voltage pin 11. One end of the negative high-voltage connector 9 is connected above the suppression resistor 10, and the high-voltage pin 11 is connected below the suppression resistor 10. The high-voltage sheath 3 is provided with a high-voltage spring 13, and the high-voltage pin 11 is connected to the upper end of the high-voltage spring 13.

[0027] The secondary winding is wound on the secondary skeleton 6, a plurality of wire slots are arranged on the secondary skeleton 6 at intervals, and the secondary winding is arranged in the wire slots in a reciprocating winding flat stacking manner. The secondary skeleton 6 is provided with a high-voltage diode 61, and the positive high-voltage end of the secondary winding is connected to the ignition module through the high-voltage diode 61. The secondary skeleton 6 is provided with a negative high-voltage plug 62, and the negative high-voltage end of the secondary winding is connected to the other end of the negative high-voltage connector 9 in a vertical direction in a vertical direction.

[0028] The Figure 4 It is a partial enlarged view of the resin application type ignition coil according to the utility model. The negative high-voltage plug 62 has an elastic latch, and the other end of the negative high-voltage connector 9 is inserted into the elastic latch in the vertical direction. The elastic connection mode replaces the traditional hard extrusion contact, which can avoid the problem of local cracking of the skeleton due to excessive stress load.

[0029] 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 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. A resin-based ignition coil with insulating properties, 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 laterally inside the housing (1) and filled with epoxy resin, the low-voltage head (2) is located at one end of the coil assembly, an ignition module is provided inside the housing (1) adjacent to the low-voltage head (2), the coil assembly includes, from the inside to the outside, a C-shaped iron core (4), a primary frame (5) provided on one arm of the C-shaped iron core (4), a secondary frame (6) provided outside the primary frame (5), and an I-shaped iron core (7) connected between the two ends of the C-shaped iron core (4), the other arm of the C-shaped iron core (4) is covered with a rubber cover (8), the remaining part of the C-shaped iron core (4) is wrapped with plastic, and the outline of the rubber cover (8) matches the outline of the secondary frame (6).

2. The ignition coil for application of insulating resin according to claim 1, characterized in that: The bottom of the rubber cover (8) extends to both sides and covers the secondary frame (6).

3. The ignition coil for application of insulating resin according to claim 1, characterized in that: The C-type iron core (4) and the I-type iron core (7) are attracted together by a magnetic sheet (12).

4. The ignition coil for application of insulating resin according to claim 1, characterized in that: A primary winding is wound on the primary skeleton (5), and a primary connecting piece (51) is provided on the primary skeleton (5) to connect to the primary winding. The primary connecting piece (51) is connected to the ignition module.

5. The ignition coil for application of insulating resin according to claim 1, characterized in that: The secondary skeleton (6) is wound with secondary windings, and the secondary skeleton (6) is provided with a plurality of wire slots at intervals. The secondary windings are reciprocated and flatly stacked in the wire slots.

6. The ignition coil for application of insulating resin according to claim 5, characterized in that: A high-voltage diode (61) is provided on the secondary frame (6), and the positive high-voltage end of the secondary winding is connected to the ignition module through the high-voltage diode (61).

7. The ignition coil for application of insulating resin according to claim 5, characterized in that: The bottom of the coil assembly is provided with a negative high voltage connector (9), a suppression resistor (10), and a high voltage pin (11). One end of the negative high voltage connector (9) is connected above the suppression resistor (10), and the high voltage pin (11) is connected below the suppression resistor (10).

8. The ignition coil for application of insulating resin according to claim 7, characterized in that: The secondary frame (6) is provided with a negative high voltage plug (62), and the negative high voltage end of the secondary winding is connected to the other end of the negative high voltage connector (9) in a vertical direction through the negative high voltage plug (62).

9. The ignition coil for application of insulating resin according to claim 8, characterized in that: The negative high voltage plug (62) has an elastic pin, and the other end of the negative high voltage connector (9) is inserted into the elastic pin in the vertical direction.

10. The ignition coil for application of insulating resin 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 (11) is connected to the upper end of the high-pressure spring (13).

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