An overhead ignition coil insulation structure

Abstract

This utility model discloses a top-mounted ignition coil insulation structure, relating to the field of ignition coil insulation technology. The top-mounted ignition coil insulation structure includes a housing, with a first mounting groove inside the housing. A core body is installed inside the first mounting groove, and a core coating is fitted onto the outside of the core body. A second mounting groove is formed on the inner wall of the housing, and a quick-installation mechanism is installed inside the second mounting groove. This utility model facilitates the installation of an isolation plate into the housing without tools via the quick-installation mechanism. Furthermore, the isolation plate is easily disassembled and replaced if damaged. The isolation plate and the core coating separate the core body from the secondary coil, preventing high voltage from the secondary coil from striking the core body. Simultaneously, the isolation plate buffers the effects of differences in expansion coefficients and facilitates separation from the isolation plate. Each component performs its function, preventing the core coating and the insulation of the isolation plate from being affected by stress caused by differences in expansion coefficients and curing stress.

Description

Technical Field

[0001] This utility model relates to the field of ignition coil insulation technology, specifically a top-mounted ignition coil insulation structure. Background Technology

[0002] The ignition coil is powered by a 14V voltage supplied to the plug. Through the turns ratio of the primary and secondary windings and the iron core, energy is converted into a 35KV high voltage, which breaks down the spark plug for ignition. During the ignition process, the insulation between the secondary coil and the iron core is very important. An unreasonable structure can easily cause the secondary high voltage to strike the iron core.

[0003] The existing ignition coil insulation structure has poor strength and is prone to cracking after long-term use. The secondary high voltage can easily hit the iron core, and when the sealing structure is damaged, it is not easy to disassemble and replace, which reduces its practicality.

[0004] Based on this, a top-mounted ignition coil insulation structure is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a top-mounted ignition coil insulation structure to solve the problems in the prior art, such as poor strength, easy cracking after long-term use, and the easy for secondary high voltage to strike the iron core.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An insulation structure for a top-mounted ignition coil includes a housing, a first mounting groove inside the housing, an iron core body installed inside the first mounting groove, and an iron core coating covering the outside of the iron core body.

[0008] The inner wall of the housing is provided with a second mounting groove, and a quick-installation mechanism is installed inside the second mounting groove. An isolation plate is installed inside the housing through the quick-installation mechanism.

[0009] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0010] In one alternative: the quick-release mechanism includes a spring, which is fixedly installed inside the second mounting slot, with a positioning ball fixedly installed at one end of the spring, and an end cap fixedly installed on the inner wall of the housing at the port of the second mounting slot.

[0011] In one alternative: a positioning groove is provided on one side of the isolation plate, and the positioning groove is adapted to the positioning ball.

[0012] In one alternative: the separator comprises a polyimide film, one side of which is adhered to a Nomex paper, and one side of which is adhered to a silicone layer.

[0013] In one alternative: a secondary coil is installed inside the housing and on one side of the isolation plate.

[0014] In one alternative, the material used for the core coating is polyurethane.

[0015] In one alternative: a high-pressure sheath is fixedly installed at the bottom of the housing.

[0016] In one alternative: a negative high-voltage pin is fixedly installed inside the high-voltage sheath.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model uses a quick-installation mechanism to easily install the isolation plate into the inside of the housing without the need for tools. At the same time, the isolation plate can be easily disassembled and replaced if it is damaged, which improves its practicality.

[0019] 2. The insulating plate and the core coating of this utility model separate the core body from the secondary coil, preventing the secondary high voltage from hitting the core body. At the same time, it buffers the effect of the difference in expansion coefficient and separates from the insulating plate. Each performs its own function, avoiding the influence of stress and curing stress caused by the difference in expansion coefficient of the core coating and the insulation of the insulating plate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a top view of the structure of this utility model.

[0022] Figure 3 This is a schematic diagram of the installation structure of the isolation plate of this utility model.

[0023] Figure 4 This is a schematic diagram of the quick-assembly mechanism of this utility model.

[0024] Figure 5 This is a cross-sectional view of the isolation plate of this utility model.

[0025] Figure reference numerals: 1. Housing; 2. First mounting slot; 3. Core body; 4. Core coating; 5. Isolation plate; 51. Polyimide film; 52. Nomex paper; 53. Silicone layer; 6. Second mounting slot; 7. Quick-release mechanism; 71. Spring; 72. Positioning ball; 73. End cap; 8. Positioning slot; 9. Secondary coil; 10. High voltage sheath; 11. Negative high voltage pin. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] In one embodiment, such as Figures 1-5 As shown, a top-mounted ignition coil insulation structure includes a housing 1, a first mounting groove 2 is provided inside the housing 1, an iron core body 3 is installed inside the first mounting groove 2, and an iron core coating 4 is sleeved on the outside of the iron core body 3. The material of the iron core coating 4 is polyurethane.

[0028] The inner wall of the housing 1 is provided with a second mounting groove 6, and a quick-installation mechanism 7 is installed inside the second mounting groove 6. An isolation plate 5 is installed inside the housing 1 through the quick-installation mechanism 7.

[0029] In this embodiment, the quick-installation mechanism 7 facilitates the installation of the isolation plate 5 into the interior of the housing 1 without the need for tools. Furthermore, the isolation plate 5 is easily disassembled and replaced if damaged, improving practicality. The isolation plate 5 and the core coating 4 separate the core body 3 from the secondary coil 9, preventing the secondary high voltage from hitting the core body 3. Simultaneously, the isolation plate 5 buffers the effects of differences in expansion coefficients and facilitates separation from the isolation plate 5. Each component performs its function, preventing the insulation of the core coating 4 and the isolation plate 5 from being affected by stress and curing stress caused by differences in expansion coefficients.

[0030] In one embodiment, such as Figure 1 and Figure 4 As shown, the quick-installation mechanism 7 includes a spring 71, which is fixedly installed inside the second mounting groove 6. A positioning ball 72 is fixedly installed at one end of the spring 71. An end cap 73 is fixedly installed on the inner wall of the housing 1 at the port of the second mounting groove 6. A positioning groove 8 is provided on one side of the isolation plate 5, and the positioning groove 8 is adapted to the positioning ball 72. When the isolation plate 5 is inserted into the housing 1, the isolation plate 5 first contacts the positioning ball 72. The positioning ball 72 moves into the second mounting groove 6, and the spring 71 is compressed. When the isolation plate 5 is fully inserted into the housing 1, the positioning groove 8 and the positioning ball 72 are aligned. At this time, the spring 71 resets, causing the positioning ball 72 to reset. The positioning ball 72 enters the interior of the positioning groove 8, thereby locking and fixing the isolation plate 5. This structure is simple and convenient for installation and disassembly.

[0031] In one embodiment, such as Figure 1 and Figure 5As shown, the isolation plate 5 includes a polyimide film 51, with Nomex paper 52 adhered to one side of the polyimide film 51 and a silicone layer 53 adhered to one side of the Nomex paper 52. The polyimide film 51 provides excellent dielectric strength and high temperature resistance, serving as a basic insulating layer. The Nomex paper 52 enhances mechanical strength and tear resistance, supports the film structure, and disperses stress. The silicone layer 53 improves interfacial adhesion, buffers mechanical vibration, enhances environmental sealing, and effectively prevents secondary high voltage from hitting the iron core body 3.

[0032] In one embodiment, such as Figure 1 and Figure 2 As shown, a secondary coil 9 is installed inside the housing 1 and on one side of the isolation plate 5. When the secondary coil 9 is energized, it generates a secondary high voltage, which is converted into a high voltage to break down the spark plug and complete the ignition.

[0033] In one embodiment, such as Figure 1 As shown, a high-voltage sheath 10 is fixedly installed at the bottom of the housing 1. A negative high-voltage pin 11 is fixedly installed inside the high-voltage sheath 10. The negative high-voltage pin 11 serves as a conductive carrier for the high-voltage circuit and directly connects the secondary winding of the ignition coil to the spark plug electrode, ensuring that tens of thousands of volts of high-voltage electricity are accurately transmitted to the combustion chamber. The high-voltage sheath 10 wraps the high-voltage wires and connection parts with a multi-layer insulation structure to prevent high-voltage leakage and arc interference, and resists the high temperature and oil stain corrosion in the engine compartment, ensuring the stable operation of the ignition system under complex working conditions.

[0034] The above embodiment discloses a top-mounted ignition coil insulation structure, wherein the isolation plate 5 is inserted into the interior of the housing 1. The isolation plate 5 first contacts the positioning ball 72, and the positioning ball 72 moves into the interior of the second mounting groove 6. The spring 71 is compressed. When the isolation plate 5 is fully inserted into the interior of the housing 1, the positioning groove 8 is aligned with the positioning ball 72. At this time, the spring 71 resets and drives the positioning ball 72 to reset. The positioning ball 72 enters the interior of the positioning groove 8, thereby locking and fixing the isolation plate 5. This structure is simple and convenient for installation and disassembly.

[0035] The isolation plate 5 and the core coating 4 separate the core body 3 from the secondary coil 9, preventing the secondary high voltage from hitting the core body 3. At the same time, they buffer the effects of the difference in expansion coefficients and separate from the isolation plate 5. Each plays its own role, avoiding the influence of stress and curing stress caused by the difference in expansion coefficients on the insulation of the core coating 4 and the isolation plate 5. The negative high voltage pin 11, as the conductive carrier of the high voltage circuit, directly connects the secondary winding of the ignition coil to the spark plug electrode, ensuring that tens of thousands of volts of high voltage are accurately transmitted to the combustion chamber. The high voltage sheath 10 wraps the high voltage wires and connection parts with a multi-layer insulation structure to prevent high voltage leakage and arc interference, and resist the high temperature and oil stains in the engine compartment, ensuring the stable operation of the ignition system under complex conditions.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A top-mounted ignition coil insulation structure, comprising a housing (1), wherein a first mounting groove (2) is provided inside the housing (1), an iron core body (3) is installed inside the first mounting groove (2), and an iron core coating (4) is provided on the outside of the iron core body (3); Its features are, The inner wall of the housing (1) is provided with a second mounting groove (6), and a quick-installation mechanism (7) is installed inside the second mounting groove (6). An isolation plate (5) is installed inside the housing (1) through the quick-installation mechanism (7).

2. The insulation structure of a top-mounted ignition coil according to claim 1, characterized in that, The quick-installation mechanism (7) includes a spring (71), which is fixedly installed inside the second mounting groove (6). A positioning ball (72) is fixedly installed at one end of the spring (71), and an end cap (73) is fixedly installed on the inner wall of the housing (1) at the port of the second mounting groove (6).

3. The insulation structure of a top-mounted ignition coil according to claim 2, characterized in that, The isolation plate (5) has a positioning groove (8) on one side, and the positioning groove (8) is adapted to the positioning ball (72).

4. The insulation structure of a top-mounted ignition coil according to claim 1, characterized in that, The separator (5) includes a polyimide film (51), one side of which is attached to a Nomex paper (52), and one side of which is attached to a silicone layer (53).

5. The insulation structure of a top-mounted ignition coil according to claim 1, characterized in that, A secondary coil (9) is installed inside the housing (1) and on one side of the isolation plate (5).

6. The insulation structure of a top-mounted ignition coil according to claim 1, characterized in that, The material of the iron core coating (4) is polyurethane.

7. The insulation structure of a top-mounted ignition coil according to claim 1, characterized in that, A high-pressure sheath (10) is fixedly installed at the bottom of the housing (1).

8. The insulation structure of a top-mounted ignition coil according to claim 7, characterized in that, The high-voltage sheath (10) is internally fixed with a negative high-voltage pin (11).

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