High-voltage-resistant automobile ignition coil

Abstract

The utility model relates to the technical field of automobile ignition coils, in particular to a high-voltage-resistant automobile ignition coil which comprises an ignition coil shell, an iron core and a sparking plug, an isolating and blocking electromagnetic structure is arranged outside the ignition coil shell, and the isolating and blocking electromagnetic structure comprises a high-voltage coil, a low-voltage coil and a threaded column. The high-voltage coil is fixedly arranged on the inner side of the ignition coil shell, and the low-voltage coil is fixedly arranged in the ignition coil shell. According to the high-voltage-resistant automobile ignition coil, the shielding layers on the periphery are attached to the outer side of the ignition coil shell, then the nuts are screwed into the ends of the threaded columns in a rotating mode, and the metal copper shielding layers are installed and fixed through extrusion force of the nuts; the metal shielding layer wrapping the outer side of the ignition coil shell is used for solving the problem that an excessive magnetic field is easily generated by multi-layer winding of the coil to interfere with working of external automobile equipment, so that the using effect of the high-voltage-resistant automobile ignition coil is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive ignition coils, and particularly relates to a high-voltage-resistant automotive ignition coil. Background Art

[0002] Generally, there are two sets of coils in an ignition coil, namely a primary coil and a secondary coil. The primary coil is wound with relatively thick enameled wire, usually about 200 - 500 turns with enameled wire of about 0.5 - 1 mm in diameter; the secondary coil is wound with relatively thin enameled wire, usually about 15000 - 25000 turns with enameled wire of about 0.1 mm in diameter. One end of the primary coil is connected to the low-voltage power supply on the vehicle, and the other end is connected to a switching device. One end of the secondary coil is connected to the primary coil, and the other end is connected to the output end of the high-voltage wire to output high-voltage electricity.

[0003] For example, the authorized announcement number "CN202325975U" is an automotive ignition coil. Although the insulating filler provided can prevent impurities from affecting the low-voltage coil assembly and the high-voltage coil assembly, and can also prevent charge leakage, making the ignition coil safer, in the existing automotive ignition coils, since there are many electrical coils wound above the ignition coil, a large amount of voltage will be formed when connecting to an external circuit, and a relatively strong electromagnetic field will be formed within a certain range due to the excessive coil voltage during vehicle use. Therefore, electromagnetic waves are easily transmitted outside the ignition coil to cause interference and influence on other electronic component devices of the vehicle, thus directly reducing the use effect of the automotive ignition coil.

[0004] At the same time, in the existing automotive ignition coils, since a spark plug used to start the vehicle needs to be connected to the lower end of the ignition coil when using the ignition coil, but generally the spark plug is directly inserted below the ignition coil and connected through the frictional force of docking. Therefore, during vehicle driving, situations such as bumps and vibrations are likely to occur, and the connection position between the spark plug and the ignition coil is prone to loosening. As a result, the high-voltage electricity generated by the ignition coil when energized lacks transmission from the spark plug at the lower end, and short circuits are likely to occur, posing a danger. Summary of the Utility Model

[0005] The purpose of the present utility model is to solve the problems of poor use effect and easy occurrence of danger in automotive ignition coils, and to propose a high-voltage-resistant automotive ignition coil.

[0006] To achieve the above object, the present utility model provides the following technical solutions: A high-voltage resistant automotive ignition coil, comprising an ignition coil housing, an iron core, and a spark plug. An electromagnetic isolation and blocking structure is provided outside the ignition coil housing. The electromagnetic isolation and blocking structure includes a high-voltage coil, a low-voltage coil, and threaded posts. The high-voltage coil is fixedly arranged inside the ignition coil housing. The low-voltage coil is fixedly arranged inside the ignition coil housing. A plurality of the threaded posts are fixedly connected to the outer wall of the ignition coil housing. A plurality of nuts are threadedly connected to the outside of the plurality of threaded posts. A shielding layer is movably connected to the inside of the plurality of nuts. The inside of the plurality of shielding layers is movably connected to the outer wall of the ignition coil housing.

[0007] Preferably, a high-voltage resistant ignition coil working structure is provided at the lower end of the ignition coil housing;

[0008] The high-voltage resistant ignition coil working structure includes a connecting post, an insulating layer, and a filter;

[0009] The filter is fixedly connected below the ignition coil housing. The connecting post is fixedly connected to the bottom end of the ignition coil housing. The insulating layer is fixedly installed on the inner wall of the connecting post. A docking head is fixedly connected below the filter. A spring is fixedly installed at the lower end of the docking head. A high-voltage terminal is fixedly installed at the lower end of the spring.

[0010] Preferably, a spark plug firm connection structure is provided below the connecting post;

[0011] The spark plug firm connection structure includes a threaded sleeve, pressing pieces, and clamping heads;

[0012] The threaded sleeve is fixedly sleeved on the outer wall of the connecting post. A sleeve is threadedly connected to the outside of the threaded sleeve. Two convex blocks are fixedly installed at the lower end of the sleeve. Two pressing pieces are movably connected to both sides of the outer wall of the connecting post. Clamping heads are fixedly installed on the inner sides of the two pressing pieces. The outer walls of the tops of the two pressing pieces are slidably connected to the lower ends of the convex blocks.

[0013] Preferably, the spark plug is movably connected to the lower end of the connecting post. The top end of the spark plug is movably connected to the lower end of the high-voltage terminal. The inner walls of the two clamping heads are movably connected to the outer wall of the spark plug.

[0014] Preferably, a power connection head is fixedly installed at the top end of the ignition coil housing. The lower end of the power connection head is electrically connected to the low-voltage coil.

[0015] Preferably, the iron core is fixedly installed inside the ignition coil housing. The lower end of the high-voltage coil is electrically connected to the filter.

[0016] A high-voltage resistant automotive ignition coil proposed by the present utility model has the beneficial effects that by attaching multiple shielding layers around the outside of the ignition coil housing, and then rotating and screwing a nut into the end of a threaded post, the installation and fixation of the metal copper shielding layer are completed through the extrusion force of the nut. The metal shielding layer wrapped around the outside of the ignition coil housing is used to reduce the problem that excessive magnetic fields are easily generated by the multi-layer winding of the coil and interfere with the operation of external automotive equipment, thereby improving the usage effect of the high-voltage resistant automotive ignition coil.

[0017] By inserting the top end of the spark plug into the inside of the connecting post to ignite the vehicle. After the spark plug is inserted into the inside of the connecting post, the rotating sleeve moves downward. At this time, the sleeve will push the two bumps at the bottom downward. When the bumps move downward, they will squeeze the extrusion pieces of the trapezoidal block inward, and then the extrusion pieces will push the clamping heads on both sides to clamp the outer wall of the spark plug, and the spark plug is fixedly clamped by the extrusion force, improving the usage safety of the high-voltage resistant automotive ignition coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0019] Figure 2 is Figure 1 the front cross-sectional schematic diagram of

[0020] Figure 3 is Figure 1 the side cross-sectional schematic diagram of

[0021] Figure 4 is Figure 2 the enlarged cross-sectional view of part A in

[0022] Figure 5 is Figure 2 the enlarged cross-sectional view of part B in

[0023] Figure 6 is Figure 2 the enlarged cross-sectional view of part C in

[0024] In the figure: 1. Ignition coil housing, 2. Power connection head, 3. Iron core, 4. Spark plug, 5. Electromagnetic isolation and blocking structure, 51. High-voltage coil, 52. Low-voltage coil, 53. Shielding layer, 54. Threaded post, 55. Nut, 6. High-voltage resistant ignition coil working structure, 61. Connecting post, 62. Insulating layer, 63. High-voltage terminal, 64. Spring, 65. Docking head, 66. Filter, 7. Spark plug firm connection structure, 71. Threaded sleeve, 72. Sleeve, 73. Bump, 74. Extrusion piece, 75. Clamping head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present utility model will be further described below in conjunction with the accompanying drawings:

[0026] Please refer to Figures 1-6 a high-voltage-resistant automotive ignition coil, which includes an ignition coil housing 1, an iron core 3, and a spark plug 4. An electromagnetic isolation and blocking structure 5 is provided outside the ignition coil housing 1. The electromagnetic isolation and blocking structure 5 includes a high-voltage coil 51, a low-voltage coil 52, and threaded posts 54. The high-voltage coil 51 is fixedly arranged inside the ignition coil housing 1. Both the high-voltage coil 51 and the low-voltage coil 52 belong to the prior art already disclosed in the patent with the patent number "CN202325975" named "An Automotive Ignition Coil".

[0027] The low-voltage coil 52 is fixedly arranged inside the ignition coil housing 1. A plurality of threaded posts 54 are fixedly connected to the outer wall of the ignition coil housing 1. A plurality of nuts 55 are threadedly connected to the outside of the plurality of threaded posts 54. A shielding layer 53 is movably connected to the inside of the plurality of nuts 55. The shielding layer 53 is made of a thin metal plate of copper. By attaching the plurality of shielding layers 53 around the outside of the ignition coil housing 1 and then screwing the nuts 55 into the ends of the threaded posts 54, the installation and fixation of the copper metal shielding layer 53 are completed through the extrusion force of the nuts 55. The inside of the plurality of shielding layers 53 is movably connected to the outer wall of the ignition coil housing 1.

[0028] Since both the high-voltage coil 51 and the low-voltage coil 52 belong to the prior art already disclosed in the patent with the patent number "CN202325975" named "An Automotive Ignition Coil", a conductive copper wire is wound around the ignition coil in multiple turns. A shielding layer 53 is movably connected to the inside of the plurality of nuts 55. The shielding layer 53 is made of a thin metal plate of copper. By attaching the plurality of shielding layers 53 around the outside of the ignition coil housing 1 and then screwing the nuts 55 into the ends of the threaded posts 54, the installation and fixation of the copper metal shielding layer 53 are completed through the extrusion force of the nuts 55. The problem that excessive magnetic fields are easily generated by the multi-layer winding of the coil and interfere with the operation of external automotive equipment is reduced by using the metal shielding layer wrapped around the outside of the ignition coil housing 1, thereby improving the use effect of the high-voltage-resistant automotive ignition coil.

[0029] Please refer to Figures 1-6 below the connecting column 61, there is a spark plug firmly connecting structure 7. The spark plug firmly connecting structure 7 includes a threaded sleeve 71, a pressing piece 74, and a clamping head 75. The threaded sleeve 71 is fixedly sleeved on the outer wall of the connecting column 61. A sleeve 72 is threadedly connected to the outside of the threaded sleeve 71. The sleeve 72 can be rotated and screwed downward along the outside of the threaded sleeve 71 by using the thread. Two convex blocks 73 are fixedly installed at the lower end of the sleeve 72. Two pressing pieces 74 are movably connected to both sides of the outer wall of the connecting column 61. A clamping head 75 is fixedly installed on the inside of the two pressing pieces 74. The outer wall of the top ends of the two pressing pieces 74 is slidably connected to the lower end of the convex blocks 73. The spark plug 4 is movably connected to the lower end of the connecting column 61.

[0030] The spark plug 4 is a relatively mature technical means at present. The top end of the spark plug 4 is inserted into the inside of the connecting column 61 to ignite the car. After the spark plug 4 is inserted into the inside of the connecting column 61, the rotating sleeve 72 moves downward. At this time, the sleeve 72 will push the two bumps 73 at the bottom end downward. The pressing piece 74 is made of a plastic material with a certain toughness. The top end of the pressing piece 74 is provided with a trapezoidal block with a smaller upper part and a wider lower part. When the bump 73 moves downward, it will squeeze the pressing piece 74 of the trapezoidal block and squeeze it inward. Then the pressing piece 74 will push the clamping heads 75 on both sides to clamp the outer wall of the spark plug 4, and use the squeezing force to fixedly clamp the spark plug 4. The top end of the spark plug 4 is movably connected to the lower end of the high-voltage terminal 63, and the inner walls of the two clamping heads 75 are movably connected to the outer wall of the spark plug 4;

[0031] Since the spark plug 4 is a relatively mature technical means at present, the top end of the spark plug 4 is inserted into the inside of the connecting column 61 to ignite the car. After the spark plug 4 is inserted into the inside of the connecting column 61, the rotating sleeve 72 moves downward. At this time, the sleeve 72 will push the two bumps 73 at the bottom end downward. The pressing piece 74 is made of a plastic material with a certain toughness. The top end of the pressing piece 74 is provided with a trapezoidal block with a smaller upper part and a wider lower part. When the bump 73 moves downward, it will squeeze the pressing piece 74 of the trapezoidal block and squeeze it inward. Then the pressing piece 74 will push the clamping heads 75 on both sides to clamp the outer wall of the spark plug 4, and use the squeezing force to fixedly clamp the spark plug 4, improving the use safety of the high-voltage-resistant automotive ignition coil.

[0032] Please refer to Figures 1-6 , the lower end of the ignition coil housing 1 is provided with a high-voltage-resistant ignition coil working structure 6. The high-voltage-resistant ignition coil working structure 6 includes a connecting column 61, an insulating layer 62 and a filter 66. The filter 66 is fixedly connected below the ignition coil housing 1. The filter 66 is a relatively mature existing technology at present. The filter 66 is internally provided with a capacitor and a resistor structure to reduce the influence of electromagnetic interference. The connecting column 61 is fixedly connected to the bottom end of the ignition coil housing 1, and the inner wall of the connecting column 61 is fixedly installed with an insulating layer 62. The insulating layer 62 is made of a rubber material;

[0033] It can prevent the current from being transmitted to the outer connecting column 61, making the internal structure of the ignition coil housing 1 more capable of withstanding the influence of high-voltage electricity, thereby improving the high-voltage resistance ability of the high-voltage-resistant automotive ignition coil. A docking head 65 is fixedly connected below the filter 66. A spring 64 is fixedly installed at the lower end of the docking head 65. A high-voltage terminal 63 is fixedly installed at the lower end of the spring 64. A power connection head 2 is fixedly installed at the top of the ignition coil housing 1. The high-voltage terminal 63 adopts the high-voltage head structure disclosed in the patent No. "CN202325975U" of the comparative document, titled "An Automotive Ignition Coil". The power connection head 2 can be connected and fixed to the automotive circuit. The lower end of the power connection head 2 is electrically connected to the low-voltage coil 52. The iron core 3 is fixedly installed inside the ignition coil housing 1. The lower end of the high-voltage coil 51 is electrically connected to the filter 66.

[0034] Working principle:

[0035] When using the high-voltage-resistant automotive ignition coil installed inside the vehicle to start the vehicle for ignition:

[0036] High-voltage-resistant automotive ignition coil electromagnetic interference shielding structure:

[0037] Both the high-voltage coil 51 and the low-voltage coil 52 belong to the prior art disclosed in the patent No. "CN202325975U" of the comparative document, titled "An Automotive Ignition Coil". Conductive copper wires are wound around the ignition coil in multiple turns. A shielding layer 53 is movably connected inside multiple nuts 55. The shielding layer 53 is made of a metal thin plate made of metallic copper. By attaching multiple shielding layers 53 around the outside of the ignition coil housing 1, and then rotating the nut 55 and screwing it onto the end of the threaded column 54, the installation and fixation of the metallic copper shielding layer 53 are completed through the extrusion force of the nut 55. The metal shielding layer wrapped around the outside of the ignition coil housing 1 is used to reduce the problem that excessive magnetic fields are easily generated by the multi-layer winding of the coil and interfere with the operation of external automotive equipment, thereby improving the use effect of the high-voltage-resistant automotive ignition coil;

[0038] High-voltage-resistant automotive ignition coil spark plug clamping and fixing structure:

[0039] The spark plug 4 belongs to a relatively mature technical means at the present stage. The top of the spark plug 4 is inserted into the connecting column 61 to ignite the vehicle. After the spark plug 4 is inserted into the connecting column 61, the rotating sleeve 72 moves downward. At this time, the sleeve 72 will push the two bottom convex blocks 73 downward. The pressing piece 74 is made of a plastic material with a certain toughness. The top of the pressing piece 74 is provided with a trapezoidal block with a smaller upper part and a wider lower part. When the convex block 73 moves downward, it will squeeze the trapezoidal block of the pressing piece 74 and squeeze it inward. Then the pressing piece 74 will push the two clamping heads 75 on both sides to clamp the outer wall of the spark plug 4, and the spark plug 4 is fixedly clamped by the extrusion force.

[0040] Although the present utility model has been illustrated and described by reference to the preferred embodiments, those of ordinary skill in the art should understand that various changes in form and detail may be made within the scope of the claims.

Claims

1. A high-voltage resistant automotive ignition coil, comprising an ignition coil housing (1), an iron core (3), and a spark plug (4), characterized in that: An electromagnetic isolation and blocking structure (5) is provided outside the ignition coil housing (1). The electromagnetic isolation and blocking structure (5) includes a high-voltage coil (51), a low-voltage coil (52), and threaded posts (54). The high-voltage coil (51) is fixedly arranged inside the ignition coil housing (1), the low-voltage coil (52) is fixedly arranged inside the ignition coil housing (1), a plurality of the threaded posts (54) are fixedly connected to the outer wall of the ignition coil housing (1), a plurality of nuts (55) are threadedly connected to the outer sides of the plurality of threaded posts (54), a shielding layer (53) is movably connected to the inner sides of the plurality of nuts (55), and the inner sides of the plurality of shielding layers (53) are movably connected to the outer wall of the ignition coil housing (1).

2. The high-voltage resistant automotive ignition coil according to claim 1, characterized in that: A high-voltage-resistant ignition coil working structure (6) is provided at the lower end of the ignition coil housing (1); The high-voltage-resistant ignition coil working structure (6) includes a connecting post (61), an insulating layer (62), and a filter (66); The filter (66) is fixedly connected below the ignition coil housing (1), the connecting post (61) is fixedly connected to the bottom end of the ignition coil housing (1), the insulating layer (62) is fixedly installed on the inner wall of the connecting post (61), a docking head (65) is fixedly connected below the filter (66), a spring (64) is fixedly installed at the lower end of the docking head (65), and a high-voltage terminal (63) is fixedly installed at the lower end of the spring (64).

3. The high-voltage resistant automotive ignition coil according to claim 2, wherein: A spark plug firm connection structure (7) is provided below the connecting post (61); The spark plug firm connection structure (7) includes a threaded sleeve (71), a pressing piece (74), and a clamping head (75); The threaded sleeve (71) is fixedly sleeved on the outer wall of the connecting post (61), a sleeve (72) is threadedly connected to the outer side of the threaded sleeve (71), two convex blocks (73) are fixedly installed at the lower end of the sleeve (72), two pressing pieces (74) are movably connected to both sides of the outer wall of the connecting post (61), a clamping head (75) is fixedly installed on the inner sides of the two pressing pieces (74), and the outer walls of the tops of the two pressing pieces (74) are slidably connected to the lower ends of the convex blocks (73).

4. The high-voltage resistant automotive ignition coil according to claim 3, characterized in that: The spark plug (4) is movably connected to the lower end of the connecting post (61), the top end of the spark plug (4) is movably connected to the lower end of the high-voltage terminal (63), and the inner walls of the two clamping heads (75) are movably connected to the outer wall of the spark plug (4).

5. The high-voltage resistant automotive ignition coil according to claim 1, wherein: A power connection head (2) is fixedly installed at the top end of the ignition coil housing (1), and the lower end of the power connection head (2) is electrically connected to the low-voltage coil (52).

6. The high-voltage resistant automotive ignition coil according to claim 1, wherein: The iron core (3) is fixedly installed inside the ignition coil housing (1), and the lower end of the high-voltage coil (51) is electrically connected to the filter (66).

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