Overhead single-cylinder independent ignition coil

Abstract

The overhead single-cylinder independent ignition coil comprises an installation shell (1), a high-voltage head (2) is arranged at the bottom of the installation shell (1), a high-voltage sheath assembly (3) is installed on the high-voltage head (2), a low-voltage head (4) is installed on the side of the installation shell (1), a coil assembly is arranged in the installation shell (1), an ignition module (5) is arranged in the installation shell (1), and the ignition module (5) is connected with the high-voltage sheath assembly (3). A heat dissipation plate (6) is arranged outside the installation shell (1), a plurality of heat dissipation fins (61) are formed on the surface of the heat dissipation plate (6), and the ignition module (5) and the heat dissipation plate (6) are tightly attached to the surfaces of the two sides of the installation shell (1) in the mode that the positions of the ignition module (5) and the heat dissipation plate (6) correspond to each other. Due to the adoption of the technical scheme, the heat dissipation aluminum plate is additionally arranged on the surface of the coil shell to dissipate heat of the ignition module, so that the working temperature of the ignition module in the using process is effectively reduced, and the service life of the ignition coil is prolonged.

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 utility model patent with application number 201810931477.X discloses a kind of top-mounted single cylinder independent ignition coil, including high-pressure rod, high-pressure rod has passageway inside, high-pressure spring is arranged in passageway, the bottom of high-pressure rod has high-pressure connection end, the top of high-pressure rod has interconnection end;Mounting shell is connected at interconnection end, mounting shell has opening towards side, opening is equipped with a drawer structure, drawer mechanism includes frame body, coil assembly, low pressure head, coil assembly includes T-shaped core pressed from powder metallurgy, PI insulating layer covering on the core column of T-shaped core, primary winding wound on PI insulating layer, secondary skeleton set outside primary winding, secondary winding wound on secondary skeleton, and mouth-shaped core pressed from powder metallurgy arranged outside T-shaped core, the inner wall between the bottom surface of T-shaped core and mouth-shaped core is adsorbed together by a rare earth magnet, low pressure head has a substrate, substrate is provided with ignition module, low voltage tab connected by resistance welding. The ignition coil of the structure has the problems of large energy density and large heat generation, and the existing ignition coil structure needs to be improved for this problem. SUMMARY

[0003] The utility model aims at providing a kind of top-mounted single cylinder independent ignition coil with lower working temperature.

[0004] To achieve the above purpose, the utility model adopts the technical scheme of: a kind of top-mounted single cylinder independent ignition coil, including mounting shell, the bottom of mounting shell has high pressure head, high pressure head is installed with high pressure sheath assembly, low pressure head is installed in the side of mounting shell, coil assembly is arranged in the inside of mounting shell, wherein, ignition module is arranged in the inside of mounting shell, heat sink is arranged outside mounting shell, the surface of heat sink is formed with a plurality of heat dissipation fins, the ignition module and heat sink are tightly attached on the two side surfaces of mounting shell in position correspondence.

[0005] Preferably, the outer surface of the mounting shell is provided with a sliding groove, and the heat sink is installed on the outer surface of the mounting shell through the sliding groove.

[0006] Preferably, the bottom surface of the heat dissipation plate is fixed with the outer surface of the mounting shell through rivet points.

[0007] Preferably, the coil assembly comprises a core, a primary skeleton sleeved outside the core, a secondary skeleton sleeved on the primary skeleton, a first L-shaped core and a second L-shaped core arranged outside the secondary skeleton, the first L-shaped core and the second L-shaped core being combined together to form a U shape and being connected to two ends of the core respectively.

[0008] Preferably, the first L-shaped core and the second L-shaped core are wrapped with a buffer cover outside.

[0009] Preferably, the first L-shaped core and the second L-shaped core have a pair of interconnected end faces at the side ends.

[0010] Preferably, the first L-shaped core and the second L-shaped core are adsorbed together through a magnetic sheet between the interconnected end faces.

[0011] Preferably, the high-voltage sheath assembly comprises a high-voltage connecting rod, a high-voltage sheath and a cylinder cover sealing cover, the high-voltage sheath is sleeved on the lower end of the high-voltage connecting rod, the cylinder cover sealing cover is sleeved on the upper end of the high-voltage connecting rod, and the high-voltage spring is longitudinally arranged in the high-voltage connecting rod and the high-voltage sheath.

[0012] Preferably, the secondary skeleton is provided with a high-voltage diode and a negative high-voltage plug, and the secondary skeleton is wound with a secondary winding, one end of the secondary winding is connected to the high-voltage diode, and the other end is connected to the negative high-voltage plug.

[0013] Preferably, 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, one end of the negative high-voltage connector is connected above the suppression resistor, and the other end is connected to the negative high-voltage plug.

[0014] Due to the above technical scheme, the ignition module is cooled through the surface of the coil shell, the working temperature of the ignition module in use is effectively reduced, and the service life of the ignition coil is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0015] ATTACHED Figure 1 It is a perspective view of the top-mounted single-cylinder independent ignition coil according to the utility model;

[0016] ATTACHED Figure 2 It is an exploded view of the top-mounted single-cylinder independent ignition coil 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 to have the meaning understood by a person having ordinary knowledge in the art. However, the 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. 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 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 in the drawings indicate like or similar elements.

[0020] FIG. 1 is a perspective view of a top-mounted single-cylinder independent ignition coil according to the present application; FIG. 2 is an exploded view of the top-mounted single-cylinder independent ignition coil according to the present application. In the embodiment, the top-mounted single-cylinder independent ignition coil includes a mounting case 1, the bottom of the mounting case 1 has a high-pressure head 2, the high-pressure head 2 is installed with a high-pressure sheath assembly 3, the side of the mounting case 1 is installed with a low-pressure head 4, the inside of the mounting case 1 is provided with a coil assembly, wherein the inside of the mounting case 1 is provided with an ignition module 5, the outside of the mounting case 1 is provided with a heat sink plate 6, the surface of the heat sink plate 6 forms a plurality of heat dissipation fins 61, the ignition module 5 and the heat sink plate 6 are tightly attached to the two side surfaces of the mounting case 1 in a position corresponding relationship. The heat dissipation of the ignition module is realized by increasing the heat dissipation aluminum plate on the surface of the coil shell, effectively reducing the working temperature of the ignition module during use, prolonging the service life of the ignition coil. Figure 1 Figure 2 is an exploded view of the top-mounted single-cylinder independent ignition coil according to the present application. In the embodiment, the top-mounted single-cylinder independent ignition coil includes a mounting case 1, the bottom of the mounting case 1 has a high-pressure head 2, the high-pressure head 2 is installed with a high-pressure sheath assembly 3, the side of the mounting case 1 is installed with a low-pressure head 4, the inside of the mounting case 1 is provided with a coil assembly, wherein the inside of the mounting case 1 is provided with an ignition module 5, the outside of the mounting case 1 is provided with a heat sink plate 6, the surface of the heat sink plate 6 forms a plurality of heat dissipation fins 61, the ignition module 5 and the heat sink plate 6 are tightly attached to the two side surfaces of the mounting case 1 in a position corresponding relationship. The heat dissipation of the ignition module is realized by increasing the heat dissipation aluminum plate on the surface of the coil shell, effectively reducing the working temperature of the ignition module during use, prolonging the service life of the ignition coil.

[0021] ​The outer surface of the mounting shell 1 is provided with a sliding groove 19, and the heat sink 6 is mounted on the outer surface of the mounting shell 1 through the sliding groove 19. The bottom surface of the heat sink 6 is fixed with the outer surface of the mounting shell 1 through rivet points. Considering the coil working environment (high temperature and vibration), therefore, fastening points are punched at the positions where the heat sink and the outer shell surface are in contact to ensure that they will not fall off during use. It is not considered to smear glue on the contact surface of the heat sink and the outer shell, because the surface cleanliness of this process is difficult to guarantee,

[0022] The coil assembly comprises a core 11, a primary skeleton 12 sleeved outside the core 11, a secondary skeleton 13 sleeved on the primary skeleton 12, a first L-shaped core 14 and a second L-shaped core 15 arranged outside the secondary skeleton 13, and the first L-shaped core 14 and the second L-shaped core 15 are combined together to form a U shape and are respectively connected to two ends of the core 11. Since the assembly of the I-shaped core and the U-shaped core is difficult, it is not easy to control the air gap (magnet thickness tolerance) between the I-shaped core and the U-shaped core. By making two L-shaped cores and combining them together, the air gap is automatically adjusted.

[0023] The first L-shaped core 14 and the second L-shaped core 15 are wrapped with a buffer cover, which can effectively prevent the resin from cracking after filling the resin; the side end of the first L-shaped core 14 and the second L-shaped core 15 has a pair of interconnected end faces 20. The interconnected end faces 20 of the first L-shaped core 14 and the second L-shaped core 15 are adsorbed together through a magnetic sheet 16.

[0024] The high-voltage sheath assembly 3 comprises a high-voltage connecting rod 31, a high-voltage sheath 32, and a cylinder cover sealing cover 33. The high-voltage sheath 32 is sleeved on the lower end of the high-voltage connecting rod 31, and the cylinder cover sealing cover 33 is sleeved on the upper end of the high-voltage connecting rod 31. The high-voltage connecting rod 31 and the high-voltage sheath 32 are provided with a high-voltage spring 18 in the longitudinal direction.

[0025] The secondary skeleton 13 is provided with a high-voltage diode 7 and a negative high-voltage plug 8, and the secondary skeleton 13 is wound with a secondary winding. One end of the secondary winding is connected to the high-voltage diode 7, and the other end is connected to the negative high-voltage plug 8.

[0026] The bottom of the coil assembly is provided with a negative high-voltage connector 9, a suppression resistor 10, and a suppression resistor connecting cap 17. The suppression resistor 10 is connected to the upper end of the high-voltage spring 18 through the suppression resistor connecting cap 17. One end of the negative high-voltage connector 9 is connected above the suppression resistor 9, and the other end is connected to the negative high-voltage plug 8.

[0027] 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 top-mounted single-cylinder independent ignition coil, characterized in that: The device includes a mounting housing (1), a high-voltage head (2) at the bottom of the mounting housing (1), a high-voltage sheath assembly (3) mounted on the high-voltage head (2), a low-voltage head (4) mounted on the side of the mounting housing (1), a coil assembly inside the mounting housing (1), an ignition module (5) inside the mounting housing (1), a heat sink (6) outside the mounting housing (1), a plurality of heat sink fins (61) formed on the surface of the heat sink (6), and the ignition module (5) and the heat sink (6) are attached to the two sides of the mounting housing (1) in corresponding positions.

2. The top-mounted single-cylinder independent ignition coil according to claim 1, characterized in that: The outer surface of the mounting shell (1) is provided with a sliding groove (19), and the heat sink (6) is mounted on the outer surface of the mounting shell (1) through the sliding groove (19).

3. The top-mounted single-cylinder independent ignition coil according to claim 2, characterized in that: The bottom surface of the heat sink (6) is fixed to the outer surface of the mounting shell (1) by rivets.

4. The top-mounted single-cylinder independent ignition coil according to claim 1, characterized in that: The coil assembly includes an iron core (11), a primary frame (12) sleeved on the outside of the iron core (11), a secondary frame (13) sleeved on the primary frame (12), a first L-shaped iron core (14) and a second L-shaped iron core (15) surrounding the outside of the secondary frame (13). The first L-shaped iron core (14) and the second L-shaped iron core (15) are combined together to form a U-shape and are respectively connected to the two ends of the iron core (11).

5. The top-mounted single-cylinder independent ignition coil according to claim 4, characterized in that: The first L-shaped iron core (14) and the second L-shaped iron core (15) are wrapped with a buffer cover.

6. The top-mounted single-cylinder independent ignition coil according to claim 4, characterized in that: The first L-shaped iron core (14) and the second L-shaped iron core (15) have a pair of interconnecting end faces (20) on their side ends.

7. The top-mounted single-cylinder independent ignition coil according to claim 4, characterized in that: The first L-shaped iron core (14) and the second L-shaped iron core (15) are attracted together by a magnetic sheet (16) through their interconnecting end faces (20).

8. The top-mounted single-cylinder independent ignition coil according to claim 4, characterized in that: The high-pressure sheath assembly (3) includes a high-pressure connecting rod (31), a high-pressure sheath (32), and a cylinder head cover sealing cap (33). The high-pressure sheath (32) is fitted onto the lower end of the high-pressure connecting rod (31), and the cylinder head cover sealing cap (33) is fitted onto the upper end of the high-pressure connecting rod (31). A high-pressure spring (18) is installed longitudinally inside the high-pressure connecting rod (31) and the high-pressure sheath (32).

9. The top-mounted single-cylinder independent ignition coil according to claim 8, characterized in that: The secondary frame (13) is provided with a high voltage diode (7) and a negative high voltage plug (8). A secondary winding is wound on the secondary frame (13), with one end of the secondary winding connected to the high voltage diode (7) and the other end connected to the negative high voltage plug (8).

10. The top-mounted single-cylinder independent ignition coil according to claim 9, characterized in that: The bottom of the coil assembly is provided with a negative high voltage connector (9), a suppression resistor (10), and a suppression resistor connector (17). The suppression resistor (10) is connected to the upper end of the high voltage spring (18) through the suppression resistor connector (17). One end of the negative high voltage connector (9) is connected above the suppression resistor (10), and the other end is connected to the negative high voltage plug (8).

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