Ignition coil of a new grounding structure

Abstract

This utility model discloses a novel grounding structure for an ignition coil, comprising an upper housing and a lower housing. A control board is disposed within the upper housing, and an iron core, a primary frame, a secondary frame, and a magnetic sleeve are disposed within the lower housing. The iron core, primary frame, secondary frame, and magnetic sleeve are sequentially and parallel to each other. The iron core is inserted into the inner core of the secondary frame, and the secondary frame is inserted into the primary frame. A magnetic sleeve is disposed outside the primary frame. The control board comprises an ignition module, a positive high-voltage connector, a low-voltage connector, and a grounding pin. The grounding pin is vertically disposed on the control board. The secondary frame has a socket, and the grounding pin is inserted from top to bottom into the socket and fixedly engaged with the secondary frame.

Description

Technical Field

[0001] This utility model relates to the field of ignition coil technology, and in particular to an ignition coil with a novel grounding structure. Background Technology

[0002] The structure of a pen-type ignition coil generally includes an upper housing and a lower housing. The upper housing houses an electronic module, while the lower housing houses an iron core, a primary frame, and a secondary frame. A primary coil is wound on the primary frame, and a secondary coil is wound on the secondary frame. One end of the primary coil and the secondary coil are respectively connected to the electronic module. The electronic module receives and processes signals through electronic components, which generate a high voltage output between the primary and secondary coils to the spark plug.

[0003] A Chinese patent with publication number CN106158327B discloses a pen-type ignition coil in which the grounding pin is inserted through a small hole in the outer casing. With such or similar structures, the grounding pin is a thin needle, which is easily bent during installation or relocation, affecting the ignition coil. Furthermore, because the grounding pin is thin, after repeated high-voltage conduction to the grounding point, its current conduction performance deteriorates, thus damaging the ignition coil. Utility Model Content

[0004] The purpose of this utility model is to provide an ignition coil with a novel grounding structure. By setting a grounding pin on the vertical control board, the installation structure of the grounding pin is improved, and the grounding pin is directly inserted from top to bottom for fixing during installation.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a novel grounding structure ignition coil, comprising an upper shell and a lower shell, wherein a control board is disposed inside the upper shell, and an iron core, a primary skeleton, a secondary skeleton, and a magnetic sleeve are disposed inside the lower shell. The iron core, the primary skeleton, the secondary skeleton, and the magnetic sleeve are sequentially and parallel to each other. The iron core is inserted into the inner core of the secondary skeleton, and the secondary skeleton is inserted into the primary skeleton. A magnetic sleeve is disposed outside the primary skeleton. The control board is provided with an ignition module, a positive high voltage plug, a low voltage plug, and a grounding pin. The grounding pin is vertically disposed on the control board. The secondary skeleton has a socket, and the grounding pin is inserted into the socket from top to bottom and fixedly engaged with the secondary skeleton.

[0006] By adopting the above technical solution, the grounding pin is inserted and fixed from top to bottom, which further stabilizes the installation structure of the ignition coil, protects the grounding pin, and reduces the practical wear of the grounding pin.

[0007] A further feature of this invention is that a primary coil is wound on the outer surface of the primary frame, a secondary coil is wound on the outer surface of the secondary frame, and an air gap exists between the grounding pin and the secondary coil.

[0008] A further feature of this invention is that the grounding pin is a cylinder, the length of the grounding pin is less than the height of the secondary frame, and the hardness of the grounding pin is in the range of 80-120.

[0009] A further feature of this invention is that the bottom of the lower casing is provided with a high-voltage sheath, and the high-voltage sheath contains a high-voltage pin, a high-voltage connecting rod, and a negative high-voltage insert. The top end of the high-voltage pin is located inside the negative high-voltage insert, the negative high-voltage insert is connected to the secondary coil, and the bottom of the high-voltage pin is connected to the high-voltage connecting rod.

[0010] A further feature of this invention is that the top end of the high-pressure connecting rod is provided with a groove, the bottom of the high-pressure pin is inserted into the groove, the outer edge of the groove is provided with an arc-shaped slot, and a retaining spring is provided in the arc-shaped slot.

[0011] A further feature of this invention is that an arc groove is provided on the lower shell, and a grounding plate is provided on the arc groove, the grounding plate being connected to the grounding pin.

[0012] A further feature of this invention is that the high-pressure connecting rod is provided with a plurality of high-pressure leaf springs, and the high-pressure leaf springs abut against the high-pressure sheath.

[0013] A further feature of this invention is that the high-voltage sheath is wrapped with a metal outer shell, and the metal outer shell has several round holes.

[0014] Compared with the prior art, the ignition coil of the novel grounding structure of this utility model improves the installation structure of the grounding pin by setting the grounding pin of the vertical control board, so that the grounding pin is inserted and fixed from top to bottom, which further stabilizes the installation structure of the ignition coil; at the same time, it protects the grounding pin from damage. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the ignition coil in the embodiment.

[0016] Figure 2 This is a cross-sectional view of the ignition coil in the embodiment.

[0017] Figure 3 This is an assembly diagram of the ignition coil in the embodiment.

[0018] In the diagram: 10. Upper housing; 11. Control board; 12. Ignition module; 13. Positive high voltage connector; 14. Low voltage connector; 15. Grounding pin; 16. Negative high voltage connector; 20. Lower housing; 21. Iron core; 22. Primary frame; 23. Secondary frame; 24. Socket; 25. Magnetic sleeve; 30. High voltage sheath; 31. High voltage pin; 32. High voltage connecting rod; 33. Groove; 34. Arc-shaped slot; 35. Snap ring; 36. Shielding cover; 37. Arc groove; 38. Grounding piece; 39. High voltage leaf spring; 40. Metal outer shell; 41. Round hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. It should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] A novel grounding structure for ignition coils, such as Figure 1-3 As shown, the device includes an upper housing 10 and a lower housing 20. The lower housing 20 contains an iron core 21, a primary bobbin 22, and a secondary bobbin 23. The iron core 21 is inserted into the inner core of the secondary bobbin 23, and the secondary bobbin 23 is inserted into the primary bobbin 22. Thus, the iron core 21, primary bobbin 22, and secondary bobbin 23 are arranged parallel to each other within the lower housing 20. A magnetically conductive sleeve 25 is also provided within the lower housing 20, surrounding the primary bobbin 22. A primary coil is wound on the outer surface of the primary bobbin 22, and a secondary coil is wound on the outer surface of the secondary bobbin 23. The upper housing 10 contains a control board 11. The control board 11 is equipped with an ignition module 12, a positive high voltage connector 13, a low voltage connector 14, and a grounding pin 15. The positive high voltage connector 13, the low voltage connector 14, and the grounding pin 15 are respectively soldered onto the control board 11, and the grounding pin 15 is vertically soldered onto the control board 11. The secondary frame 23 has a corresponding socket 24 for the grounding pin 15. During assembly, the grounding pin 15 on the control board 11 is aligned with the socket 24 and inserted into the socket 24 from top to bottom to fix and cooperate with the secondary frame 23. After insertion, there is an air gap between the grounding pin 15 and the secondary coil on the secondary frame 23, and the two are parallel to each other and not connected.

[0021] like Figure 2 As shown, a high-voltage sheath 30 is provided at the bottom of the lower casing 20. The high-voltage sheath 30 contains a high-voltage pin 31, a high-voltage connecting rod 32, a high-voltage leaf spring 39, and a shield 36. The top of the high-voltage pin 31 is located inside the negative high-voltage insert 16, which is connected to the secondary coil. An integrated suppression resistor is provided on the high-voltage pin 31. A groove 33 is provided at the top of the high-voltage connecting rod 32, and the bottom of the high-voltage pin 31 is inserted into the groove 33 for connection.

[0022] To ensure a stable and secure connection between the high-pressure pin 31 and the high-pressure connecting rod 32, an arc-shaped groove 34 is provided on the outer edge of the groove 33, and a retaining spring 35 is provided inside the arc-shaped groove 34 to fix the high-pressure pin 31 to the high-pressure connecting rod 32.

[0023] In the preferred configuration, the shield 36 is positioned at the bottom of the high-voltage sheath 30, and a spark plug is inserted inside the shield 36, with the top of the spark plug abutting against the bottom of the high-voltage connecting rod 32.

[0024] like Figure 2 As shown, a plurality of high-pressure leaf springs 39 are provided on the outer surface of the high-pressure connecting rod 32. The elastic part of the high-pressure leaf spring 39 abuts against the high-pressure sheath 30, thereby stably fixing the high-pressure connecting rod 32 inside the high-pressure sheath 30.

[0025] like Figure 1 As shown, an arc groove 37 is provided on the lower housing 20, and a grounding piece 38 is provided on the arc groove 37. The grounding piece 38 is connected to the grounding pin 15. When the ignition coil is inserted into the engine, the grounding piece 38 contacts the grounding point on the engine and is grounded.

[0026] like Figure 1 As shown, a metal shell 40 is wrapped around the high-voltage sheath 30. The metal shell 40 greatly reduces the electromagnetic interference of the ignition coil. Several round holes 41 are provided on the metal shell 40.

[0027] In some embodiments, the grounding pin 15 is a cube with a length less than the height of the secondary frame 23. The grounding pin 15 is made of alloy material with a hardness range of 80-120.

[0028] The basic working principle of this utility model is as follows: When the primary coil is connected to the power supply, a strong magnetic field is generated around it as the current increases, and the iron core 21 stores the magnetic field energy; when the ignition module 12 disconnects the primary coil circuit, the magnetic field of the primary coil decays rapidly, and the secondary coil induces a very high voltage. The faster the magnetic field of the primary coil disappears, the greater the current at the moment the current is disconnected, and the greater the turns ratio of the two coils, the higher the voltage induced in the secondary coil. The high voltage pulse generated in the secondary coil is transmitted to the spark plug, generates a spark, and ignites the air-fuel mixture in the engine.

[0029] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A novel grounding structure for an ignition coil, comprising an upper housing (10) and a lower housing (20), characterized in that: The upper housing (10) is provided with a control board (11), and the lower housing (20) is provided with an iron core (21), a primary skeleton (22), a secondary skeleton (23), and a magnetic sleeve (25). The iron core (21), the primary skeleton (22), the secondary skeleton (23), and the magnetic sleeve (25) are arranged in parallel to each other in sequence. The iron core (21) is inserted into the inner core of the secondary skeleton (23), and the secondary skeleton (23) is inserted into the primary skeleton (22). The primary frame (22) is provided with a magnetic sleeve (25). The control board (11) is provided with an ignition module (12), a positive high voltage plug (13), a low voltage plug (14) and a grounding pin (15). The grounding pin (15) is vertically arranged on the control board (11). The secondary frame (23) is provided with a socket (24). The grounding pin (15) is inserted into the socket (24) from top to bottom and is fixedly engaged with the secondary frame (23).

2. The ignition coil with a novel grounding structure according to claim 1, characterized in that: The primary frame (22) has a primary coil wound on its outer surface, the secondary frame (23) has a secondary coil wound on its outer surface, and there is an air gap between the grounding pin (15) and the secondary coil.

3. The ignition coil with a novel grounding structure according to claim 2, characterized in that: The grounding pin (15) is a cube, the length of the grounding pin (15) is less than the height of the secondary frame (23), and the hardness of the grounding pin (15) is in the range of 80-120.

4. The ignition coil with a novel grounding structure according to claim 1, characterized in that: The bottom of the lower shell (20) is provided with a high voltage sheath (30). The high voltage sheath (30) is provided with a high voltage pin (31), a high voltage connecting rod (32) and a negative high voltage insert (16). The top end of the high voltage pin (31) is located inside the negative high voltage insert (16). The negative high voltage insert (16) is connected to the secondary coil. The bottom of the high voltage pin (31) is connected to the high voltage connecting rod (32).

5. The ignition coil with a novel grounding structure according to claim 4, characterized in that: The top end of the high-pressure connecting rod (32) is provided with a groove (33), the bottom of the high-pressure pin (31) is inserted into the groove (33), the outer edge of the groove (33) is provided with an arc-shaped slot (34), and a retaining spring (35) is provided in the arc-shaped slot (34).

6. The ignition coil with a novel grounding structure according to claim 1, characterized in that: The lower shell (20) has an arc groove (37) and a grounding piece (38) is provided on the arc groove (37). The grounding piece (38) is connected to the grounding pin (15).

7. The ignition coil with a novel grounding structure according to claim 5, characterized in that: The high-pressure connecting rod (32) is provided with a plurality of high-pressure leaf springs (39), and the high-pressure leaf springs (39) abut against the high-pressure sheath (30).

8. The ignition coil with a novel grounding structure according to claim 4, characterized in that: The high-pressure sheath (30) is wrapped with a metal shell (40), and the metal shell (40) has several round holes (41).

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