Ignition coil with magnetic sheet cover cylinder structure

Abstract

An ignition coil with a magnetic sheet cover cylinder structure comprises an outer shell, a low-voltage head is arranged on the upper portion of the outer shell, a high-voltage sheath is installed on the lower portion of the outer shell, a flux sleeve is tightly attached to the inner wall of the outer shell, a magnetic sheet cover cylinder is tightly attached to the inner wall of the flux sleeve, a coil assembly is arranged in the magnetic sheet cover cylinder, and the magnetic sheet cover cylinder is arranged in the coil assembly. The coil assembly sequentially comprises an iron core, a primary framework arranged outside the iron core and a secondary framework arranged outside the primary framework from inside to outside, and the magnetic sheet cover cylinder is filled with epoxy resin. Due to the fact that the magnetic sheet cover cylinder is designed on the periphery of the flux sleeve, the peripheral flux sleeve is separated from an internal secondary winding isolation area, the effect of internal stress is effectively improved, and the problem of resin cracking is 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, which makes 8-16V low voltage to secondary generation 20-40KV voltage through spark plug to produce electric spark according to set frequency on-off. The invention patent with application number CN201610651000.7 discloses a kind of ignition coil circuit structure, including the magnetic core, primary winding, secondary skeleton and secondary winding, magnetic sleeve of being arranged in shell, the magnetic core has end and stem, and longitudinal section is T-shaped structure, the other end of the magnetic core is connected with magnetic sheet, the magnetic core and magnetic sheet combination are G-shaped structure, magnetic sleeve is C-shaped structure and surrounds the G-shaped structure from side, shell has high pressure head and low pressure head, circuit module is arranged above the magnetic core, low pressure head has low voltage insert piece group in shell, the end of primary winding is connected with primary connecting sheet, magnetic earth pin is arranged on magnetic sleeve, the end of secondary winding is connected with positive high voltage insert piece and negative high voltage insert piece, low voltage insert piece group, primary connecting sheet, magnetic earth pin, positive high voltage insert piece are respectively inserted from below to above to circuit module, and negative high voltage insert piece is connected to high pressure head. The magnetic sleeve of the ignition coil of this structure is metal material, so there is greater stress here with epoxy resin contact, leading to local epoxy resin easy to crack. SUMMARY

[0003] The utility model aims at providing a kind of ignition coil with magnetic sheet cover cylinder structure that can effectively prevent the local epoxy resin cracking of magnetic sleeve.

[0004] To achieve the above object, the technical scheme adopted by the utility model is: a kind of ignition coil with magnetic sheet cover cylinder structure, 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 inner wall of the shell is tightly provided with magnetic sleeve, the inner wall of the magnetic sleeve is tightly provided with magnetic sheet cover cylinder, the inside of the magnetic sheet cover cylinder is provided with coil assembly, the coil assembly sequentially includes iron core from inside to outside, primary skeleton being arranged in the outer portion of the iron core, secondary skeleton being arranged in the outer portion of the primary skeleton, and the inside of the magnetic sheet cover cylinder is filled with epoxy resin.

[0005] As further improvement, the magnetic sleeve has elastic cylindrical structure with C-shaped section, the magnetic sleeve is nested on the outer surface of the magnetic sheet cover cylinder and is elastically tensioned on the inner wall of the shell.

[0006] As a further improvement, the lower end of the iron core is connected with a magnetic conductive sheet, and the magnetic conductive sheet is connected to the magnetic conductive sleeve below the magnetic sheet cover cylinder.

[0007] As a further improvement, the upper end of the iron core is provided with a buffer pad, and the buffer pad is provided with an ignition module above.

[0008] As a further improvement, the magnetic conductive sleeve is provided with a grounding sheet which is connected to the ignition module.

[0009] As a further improvement, the primary skeleton is provided with a primary winding, and 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.

[0010] As a further improvement, the secondary skeleton is provided with a secondary winding, and the secondary skeleton is provided with a positive high-voltage sheet and a negative high-voltage sheet connected to the secondary winding, and the positive high-voltage sheet is connected to the ignition module.

[0011] As a further improvement, a plurality of wire grooves are provided on the secondary skeleton at intervals, and the secondary winding is arranged in the wire grooves in a reciprocating manner.

[0012] 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, the other end is connected to the negative high-voltage sheet in a vertical direction, the high-voltage pin is connected below the suppression resistor, and the suppression resistor is wrapped with epoxy resin outside.

[0013] As a further improvement, the high-voltage sleeve 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 magnetic conductive sleeve is provided with a magnetic sheet cover cylinder, the peripheral magnetic conductive sleeve is separated from the internal secondary winding isolation area, the effect of internal stress is effectively improved, and the problem of resin cracking is solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACHMENT Figure 1 is a perspective view of the ignition coil with the magnetic sheet cover cylinder structure according to the present application;

[0016] ATTACHMENT Figure 2 is an exploded view of the ignition coil with the magnetic sheet cover cylinder structure according to the present application. DETAILED DESCRIPTION

[0017] Hereinafter, terms used in the specification will be briefly described, and embodiments will be described in detail. All terms used herein, including descriptive terms or technical terms, should be interpreted to have 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.

[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. Furthermore, 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.

[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 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.

[0020] FIG. 1 is a perspective view of a spark coil having a magnetic sheet cover cylinder structure according to the present application; Figure 1 FIG. 2 is an exploded view of a spark coil having a magnetic sheet cover cylinder structure according to the present application. The spark coil having a magnetic sheet cover cylinder structure in the present embodiment includes a housing 1, a low-pressure head 2 provided at an upper portion of the housing 1, a high-pressure sheath 3 mounted at a lower portion of the housing 1, a magnetic guide sleeve 4 closely provided at an inner wall of the housing 1, a magnetic sheet cover cylinder 5 closely provided at an inner wall of the magnetic guide sleeve 4, and a coil assembly provided inside the magnetic sheet cover cylinder 5. Figure 2 The coil assembly includes an iron core 6, a primary skeleton 7 provided at an outer portion of the iron core 6, and a secondary skeleton 8 provided at an outer portion of the primary skeleton 7, and the inside of the magnetic sheet cover cylinder 5 is filled with an epoxy resin.

[0021] The magnetic guide sleeve 4 has an elastic cylindrical structure having a C-shaped cross section, and the magnetic guide sleeve 4 is nested on an outer surface of the magnetic sheet cover cylinder 5 and is elastically tensioned on the inner wall of the housing 1. Since the magnetic guide sleeve of the present scheme is designed with the magnetic sheet cover cylinder around the periphery, the magnetic guide sleeve made of metal is isolated from the magnetic sheet cover cylinder made of plastic and the epoxy resin, effectively improving the effect of internal stress and solving the problem of resin cracking.

[0022] The lower end of the iron core 6 is connected with a magnetic conducting sheet 9, which is connected to the magnetic conducting sleeve 4 below the magnetic sheet cover 5. The upper end of the iron core 6 is installed with a buffer pad 10, and above the buffer pad 10 is arranged a ignition module 11. The magnetic conducting sleeve 4 is clamped with a grounding sheet 13, which is connected to the ignition module 11.

[0023] The primary winding is wound on the primary skeleton 7, and the primary skeleton 7 is provided with a primary connecting sheet 71 connected to the primary winding, which is connected to the ignition module 11. The primary connecting sheet is in the form of a reel material belt, which is assembled into the primary winding by a specific device to realize the automation of the primary connection.

[0024] The secondary winding is wound on the secondary skeleton 8, and the secondary skeleton 8 is provided with a positive high-voltage sheet 81 and a negative high-voltage sheet 82 connected to the secondary winding, and the positive high-voltage sheet 81 is connected to the ignition module 11. The secondary skeleton 8 is provided with a plurality of wire grooves at intervals, and the secondary winding is wound in a reciprocating manner to flatten and stack the wires in the wire grooves.

[0025] The bottom of the coil assembly is provided with a negative high-voltage connector 14, a suppression resistor 15, and a high-voltage pin 16. One end of the negative high-voltage connector 14 is connected above the suppression resistor 15, and the other end is connected to the negative high-voltage sheet 82 in a vertical direction. The high-voltage pin 16 is connected below the suppression resistor 15, and the suppression resistor 15 is wrapped with epoxy resin on the outside. The high-voltage sleeve 3 is provided with a high-voltage spring 12, and the high-voltage pin 16 is connected to the upper end of the high-voltage spring 12. The suppression resistor is designed with an internal structure, and the resistor is wrapped with epoxy resin around it, which increases the withstand voltage between each coil of the resistor wire and avoids the sparking phenomenon between the resistor wires.

[0026] 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 available for other similar features or aspects in other embodiments. While one or more embodiments have been described with reference to the attached drawings, a person of ordinary skill in the art will understand that various changes in form and detail can be made without departing from the spirit and scope of the claims that follow.

Claims

1. An ignition coil having a magnetic bobbin structure, 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 pressure sheath (3), the inner wall of shell (1) is tightly equipped with magnetic conductive sleeve (4), the inner wall of magnetic conductive sleeve (4) is tightly equipped with magnetic sheet cover cylinder (5), the inside of magnetic sheet cover cylinder (5) is provided with coil assembly, and coil assembly includes iron core (6) from inside to outside, primary framework (7) being provided at the outside of iron core (6), secondary framework (8) being provided at the outside of primary framework (7), and the inside of magnetic sheet cover cylinder (5) is filled with epoxy resin.

2. The magnetic shell inductor with a point of structure of a cylinder of magnetic sheet according to claim 1, characterized in that: Magnetic conductive sleeve (4) has elastic cylindrical structure with C-shaped section, and is nested on the outer surface of magnetic sheet cover cylinder (5) and is elastically tensioned on the inner wall of shell (1).

3. The magnetic shell inductor with a point of structure of a cylinder of magnetic sheet according to claim 1, characterized in that: The lower end of iron core (6) is connected with magnetic conductive sheet (9), and magnetic conductive sheet (9) is connected to magnetic conductive sleeve (4) below magnetic sheet cover cylinder (5).

4. The magnetic shell inductor with a point of structure of a cylinder of magnetic sheet according to claim 1, characterized in that: The upper end of iron core (6) is provided with buffer pad (10), and the upper side of buffer pad (10) is provided with ignition module (11).

5. The magnetic shell inductor with a point of structure of a cylinder of magnetic sheet according to claim 4, characterized in that: Grounding sheet (13) is connected to the upper side of magnetic conductive sleeve (4), and grounding sheet (13) is connected to ignition module (11).

6. The magnetic shell inductor with a magnetic shell cylinder structure point ignition coil according to claim 4, characterized in that: Primary winding is wound on primary framework (7), and primary connecting sheet (71) connected to primary winding is arranged on primary framework (7), and primary connecting sheet (71) is connected to ignition module (11).

7. The magnetic shell inductor with a magnetic shell cylinder structure point ignition coil according to claim 5, characterized in that: Secondary winding is wound on secondary framework (8), and positive high-voltage sheet (81) and negative high-voltage sheet (82) connected to secondary winding are arranged on secondary framework (8), and positive high-voltage sheet (81) is connected to ignition module (11).

8. The magnetic shell inductor with a magnetic shell cylinder structure point ignition coil according to claim 7, characterized in that: A plurality of wire grooves are arranged on secondary framework (8) at intervals, and secondary winding is wound in wire grooves in reciprocating type.

9. The magnetic shell cylinder structure ignition coil according to claim 7, characterized by: Bottom of coil assembly is provided with negative high-voltage connector (14), suppression resistance (15) and high-voltage pin (16), one end of negative high-voltage connector (14) is connected above suppression resistance (15), the other end is connected to negative high-voltage sheet (82) in vertical direction, high-voltage pin (16) is connected below suppression resistance (15), and suppression resistance (15) is wrapped with epoxy resin outside.

10. The magnetic shell inductor with a point of structure of a cylinder of magnetic sheet according to claim 9, characterized in that: High-voltage spring (12) is arranged in high-voltage sheath (3), and high-voltage pin (16) is connected to the upper end of high-voltage spring (12).

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