Low internal stress automobile ignition coil

Abstract

The low-internal-stress automobile ignition coil comprises a shell and a connecting mechanism arranged in the shell, and the connecting mechanism comprises a heat dissipation assembly, a power supply assembly and a buffering assembly; the heat dissipation assembly comprises a PCB, a power element and a shielding cover, the power supply assembly comprises an outer iron core, an inner iron core, a primary winding, a secondary winding, epoxy resin and a rubber sealing piece, and the buffer assembly comprises an elastic cushion, an ignition chain spring and a sheath. According to the utility model, heat is generated during working, the heat is upwards discharged into the shell through the heat dissipation grooves, meanwhile, the heat in the shell can be outwards transmitted by the heat dissipation fins through heat transfer, double heat dissipation is more efficient, the dust cover can prevent external dust and the like from falling into the shell, and the dust and the like are prevented from damaging the power element; the ignition chain spring can perform primary buffering on the spark plug, the spark plug is prevented from generating large shaking and further affecting ignition operation, the elastic cushion can perform secondary damping on shaking, the vibration sense is further relieved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ignition coils, in particular to a low internal stress automobile ignition coil. Background Art

[0002] With the development of automobile ignition system, the structure of automobile ignition coil is developing towards miniaturization, lightness and high performance. Existing dry ignition coils have high heat resistance and high pressure resistance, and are small in size. In particular, the high-voltage coil winding of the multi-head dry ignition coil can ignite two cylinders at the same time. Since the energy loss between the distributor head and the side electrode in the distributor is eliminated, the ignition energy can be increased and the electromagnetic interference of the electric spark to the outside world can be reduced.

[0003] For example, the application number CN212990901U discloses an ignition coil, which relates to the field of ignition coil structure, and includes a housing and an ignition coil, wherein a placement groove is formed in the housing, and an intermediate frame is provided on the side of the ignition coil away from the bottom of the placement groove, and the ignition coil is fixedly mounted on the intermediate frame. This application has the advantages of high protection of the ignition coil and strong safety performance.

[0004] However, when this type of ignition coil is in use, the heat dissipation environment is not good, resulting in poor heat dissipation efficiency of the ignition coil and high temperature during operation, which seriously affects the service life. At the same time, due to the vibration generated by the operation of the engine, the spark plug is easily caused to fall off due to vibration, the fixation is not firm, and the excessive internal stress causes the overall equipment life to be reduced, which does not meet people's usage needs. Therefore, a low internal stress automobile ignition coil is needed. Utility Model Content

[0005] In order to solve the defects of the prior art such as poor heat dissipation environment, large internal stress resulting in reduced equipment life, and unreliable fixation, the utility model provides a low internal stress automobile ignition coil.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] The utility model discloses a low internal stress automobile ignition coil, comprising a shell and a connecting mechanism arranged inside the shell, wherein the connecting mechanism comprises a heat dissipation component, a power supply component and a buffer component;

[0008] The heat dissipation assembly includes a PCB board, a power element, a shielding cover and a connector. The PCB board is fixedly installed inside the shell, the power element arranged at one end of the PCB board is installed on the inner wall of the shell, and the shielding cover is welded on the lower surface wall of the PCB board, and the connector is sleeved on the outer wall of the shell;

[0009] The power supply assembly comprises an outer iron core, an inner iron core, a primary winding, a secondary winding, epoxy resin, a rubber seal and a permanent magnet; the outer iron core is arranged inside the shielding cover, the inner iron core is arranged inside the outer iron core, the outer wall of the inner iron core is wound with a primary winding, the outer wall of the outer iron core is wound with a secondary winding, the primary winding is located between the outer iron core and the inner iron core, the secondary winding is located between the shielding cover and the outer iron core, the middle between the shielding cover and the outer iron core is filled with epoxy resin, the epoxy resin wraps the secondary winding, a rubber seal is arranged on the outer side wall of the shielding cover, the rubber seal is sealed and connected to the lower surface wall of the shell, and a permanent magnet is fixedly installed at the bottom of the outer iron core;

[0010] The buffer assembly includes an elastic pad, an anti-interference resistor, an ignition chain spring and a sleeve. The bottom of the permanent magnet is provided with an elastic pad, an anti-interference resistor is fixedly installed at one end of the elastic pad away from the permanent magnet, an ignition chain spring is installed at the bottom of the anti-interference resistor, the bottom of the shielding cover is sealed with a sleeve, and the ignition chain spring is arranged inside the sleeve.

[0011] As a preferred technical solution of the utility model, heat sinks are welded at the four corners of the top of the shell, a dust cover is fixedly installed on the top of the heat sink, and heat sink fins are embedded on the front and rear side walls of the shell.

[0012] As a preferred technical solution of the utility model, mounting columns are welded on both the front and rear side walls of the shell, and the interiors of the two groups of mounting columns are threadedly screwed with mounting grounding bolts.

[0013] As a preferred technical solution of the utility model, the number of turns of the primary winding is greater than the number of turns of the secondary winding, and the coil diameter of the primary winding is smaller than the coil diameter of the secondary winding.

[0014] As a preferred technical solution of the utility model, the size of the dust cover is exactly the same as the size of the top of the shell, and a heat dissipation groove is provided on the top of the shell, and the length of the heat dissipation groove is smaller than the length of the top of the shell.

[0015] As a preferred technical solution of the utility model, the housing is fixedly mounted on the external engine by means of mounting grounding bolts inside the mounting column.

[0016] The utility model has the following beneficial effects:

[0017] By providing a dust cover, heat dissipation fins and heat dissipation slots, the PCB board and the power components generate heat when working, and the heat is discharged upwards through the heat dissipation slots into the housing. At the same time, the heat dissipation fins on the outer wall of the housing can transfer the heat inside the housing to the outside through heat transfer, and double heat dissipation makes cooling more efficient. The dust cover above the housing can prevent dust generated by the external environment from falling into the interior of the housing. The dust cover can ensure that the internal environment of the housing is clean, avoid dust and the like from damaging the PCB board and the power components, and extend the service life of the PCB board and the power components.

[0018] By setting up elastic pads and ignition chain springs, when encountering bumps, the spark plug is stuck on the ignition chain spring. The ignition chain spring can provide primary buffering for the spark plug to prevent the spark plug from shaking too much and affecting the ignition operation. The elastic pad under the outer iron core can provide secondary shock absorption for the shaking caused by bumps, further reducing the vibration caused by bumps and extending the service life of the overall equipment.

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the low internal stress automobile ignition coil of the utility model;

[0021] Figure 2 This is a half-section structural schematic diagram of a low internal stress automobile ignition coil of the utility model;

[0022] Figure 3 This is a structural schematic diagram of a low internal stress automobile ignition coil heat dissipation component of the utility model;

[0023] Figure 4 This is a structural schematic diagram of a low internal stress automobile ignition coil power supply assembly of the utility model;

[0024] Figure 5 The utility model is a structural schematic diagram of a low internal stress automobile ignition coil buffer component.

[0025] In the figure: 1. Shell; 2. PCB board; 3. Power element; 4. Shielding cover; 5. Connector plug; 6. Outer core; 7. Inner core; 8. Primary winding; 9. Secondary winding; 10. Epoxy resin; 11. Rubber seal; 12. Permanent magnet; 13. Elastic pad; 14. Anti-interference resistor; 15. Ignition chain spring; 16. Sheath; 17. Heat sink; 18. Dust cover; 19. Heat sink fin; 20. Mounting column; 21. Mounting grounding bolt; 22. Heat sink. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0027] Example 1: Figure 1-5 As shown, the low internal stress automobile ignition coil proposed by the utility model comprises a housing 1 and a connecting mechanism arranged inside the housing 1, wherein the connecting mechanism comprises a heat dissipation component, a power supply component and a buffer component;

[0028] The heat dissipation assembly includes a PCB board 2, a power element 3, a shielding cover 4 and a plug 5. The PCB board 2 is fixedly installed inside the housing 1. The power element 3 arranged at one end of the PCB board 2 is installed on the inner wall of the housing 1, and the shielding cover 4 is welded on the lower surface wall of the PCB board 2. The plug 5 is sleeved on the outer wall of the housing 1. When working, the plug 5 is first inserted into the external port, the PCB board 2 receives the signal transmitted by the plug 5, and transmits current to the primary winding 8 on the inner core 7 through the power element 3. The shielding cover 4 can shield and protect the primary winding 8 and the secondary winding 9 inside the shielding cover 4 to avoid external signal interference, and the operation is more stable.

[0029] The power supply assembly includes an outer iron core 6, an inner iron core 7, a primary winding 8, a secondary winding 9, an epoxy resin 10, a rubber seal 11 and a permanent magnet 12. The outer iron core 6 is arranged inside the shielding cover 4, the inner iron core 7 is arranged inside the outer iron core 6, the outer wall of the inner iron core 7 is wound with the primary winding 8, the outer wall of the outer iron core 6 is wound with the secondary winding 9, the primary winding 8 is located between the outer iron core 6 and the inner iron core 7, the secondary winding 9 is located between the shielding cover 4 and the outer iron core 6, the middle of the shielding cover 4 and the outer iron core 6 is filled with epoxy resin 10, the epoxy resin 10 wraps the secondary winding 9, and a rubber seal 11 is arranged on the outer wall of the shielding cover 4, and the rubber seal 11 is sealed and connected to the outer shell 1, a permanent magnet 12 is fixedly installed at the bottom of the outer core 6. When working, the power element 3 transmits current to the primary winding 8 on the inner core 7, and then the power element 3 cuts off the power supply according to the signal, and the magnetic field generated in the primary winding 8 collapses instantly, so that the secondary winding 9 wound outside the outer core 6 generates a huge induced voltage, and the induced voltage acts on the spark plug through the anti-interference resistor 14, so that the spark plug generates an electric spark and then the engine starts. The epoxy resin 10 can protect the secondary winding 9 and prevent the secondary winding 9 from shaking, which is safer and more reliable. The rubber seal 11 can ensure that foreign debris cannot enter the inside of the shielding cover 4, and the working environment is cleaner.

[0030] Furthermore, heat sinks 17 are welded at the four corners of the top of the shell 1, and a dust cover 18 is fixedly installed on the top of the heat sink 17. Heat dissipation fins 19 are inlaid on the front and rear side walls of the shell 1. When working, by setting the dust cover 18 and the heat dissipation fins 19, the dust cover 18 above the shell 1 can prevent dust generated by the external environment from falling into the interior of the shell 1. The dust cover 18 can ensure that the internal environment of the shell 1 is clean, prevent dust from damaging the PCB board 2 and the power element 3, and extend the service life of the PCB board 2 and the power element 3.

[0031] Furthermore, mounting columns 20 are welded on the front and rear side walls of the outer shell 1, and the interiors of the two sets of mounting columns 20 are threaded with mounting grounding bolts 21. During operation, by setting the mounting grounding bolts 21, it is beneficial to fix the outer shell 1 on the engine through the mounting grounding bolts 21 inside the mounting columns 20, thereby achieving a control operation in which the outer shell 1 is firmly fixed and the grounding is more stably achieved.

[0032] Furthermore, the number of turns of the primary winding 8 is greater than the number of turns of the secondary winding 9, and the coil diameter of the primary winding 8 is smaller than the coil diameter of the secondary winding 9. During operation, by setting the primary winding 8 and the secondary winding 9, it is beneficial to generate high voltage through low voltage, and then realize the high voltage of the spark plug to break through the air to generate sparks, thereby realizing the control operation of engine starting.

[0033] Furthermore, the size of the dust cover 18 is exactly the same as the size of the top of the shell 1. A heat dissipation groove 22 is provided on the top of the shell 1. The length of the heat dissipation groove 22 is smaller than the length of the top of the shell 1. During operation, the heat dissipation groove 22 is provided, and the PCB board 2 and the power element 3 generate heat during operation. The heat is discharged upward through the heat dissipation groove 22 into the shell 1. The dust cover 18 can completely block dust on the top of the shell 1, ensure that there is no dust inside the shell 1, and extend the service life.

[0034] Furthermore, the housing 1 is fixedly mounted on the external engine by means of the mounting grounding bolt 21 inside the mounting column 20. During operation, by setting the mounting grounding bolt 21, it is beneficial to ground one end of the primary winding 8 inside the housing 1, so that the grounding is more stable and not easily disconnected due to shaking, and the operation is more stable and safer.

[0035] Example 2: Figure 1-5As shown, the low internal stress automobile ignition coil proposed by the utility model, compared with Example 1, as another implementation mode of the utility model, the buffer component includes an elastic pad 13, an anti-interference resistor 14, an ignition chain spring 15 and a sheath 16, the bottom of the permanent magnet 12 is provided with an elastic pad 13, the end of the elastic pad 13 away from the permanent magnet 12 is fixedly installed with the anti-interference resistor 14, the bottom of the anti-interference resistor 14 is installed with the ignition chain spring 15, the bottom of the shielding cover 4 is sealed and connected with the sheath 16, and the ignition chain spring 15 is arranged inside the sheath 16. During operation, by arranging the elastic pad 13 and the ignition chain spring 15, when encountering bumps, the spark plug is stuck on the ignition chain spring 15, and the ignition chain spring 15 can perform a primary buffer on the spark plug to prevent the spark plug from shaking greatly and thus affecting the ignition operation. The elastic pad 13 under the outer iron core 6 can perform a secondary shock absorption on the shaking caused by the bumps, further reduce the vibration caused by the bumps, and extend the service life of the overall equipment.

[0036] When working, first insert the connector 5 into the external port, then insert the spark plug into the inside of the sheath 16, and then fix the housing 1 on the engine through the mounting grounding bolt 21 inside the mounting column 20. The PCB board 2 receives the signal transmitted from the connector 5, and transmits current to the primary winding 8 on the inner iron core 7 through the power element 3. Then, according to the signal, the power element 3 cuts off the power supply, and the magnetic field generated in the primary winding 8 collapses instantly, so that the secondary winding 9 wound outside the outer iron core 6 generates a huge induced voltage, and the induced voltage acts on the spark plug through the anti-interference resistor 14, so that the spark plug generates electric sparks and the engine starts.

[0037] Next, the PCB board 2 and the power element 3 generate heat when working, and the heat is discharged upward into the shell 1 through the heat dissipation groove 22. At the same time, the heat dissipation fins 19 on the outer wall of the shell 1 can transfer the heat inside the shell 1 to the outside through heat transfer. Double heat dissipation and more efficient cooling. The dust cover 18 above the shell 1 can prevent dust generated by the external environment from falling downward into the interior of the shell 1. The dust cover 18 can ensure that the internal environment of the shell 1 is clean, prevent dust from damaging the PCB board 2 and the power element 3, and extend the service life of the PCB board 2 and the power element 3.

[0038] Finally, when encountering bumps, the spark plug is stuck on the ignition chain spring 15, which can provide primary buffering for the spark plug to prevent the spark plug from shaking too much and thus affecting the ignition operation. The elastic pad 13 under the outer iron core 6 can provide secondary shock absorption for the shaking caused by the bumps, further reducing the vibration caused by the bumps and extending the service life of the entire equipment.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low internal stress automobile ignition coil, comprising a housing (1) and a connecting mechanism arranged inside the housing (1), characterized in that: The connecting mechanism includes a heat dissipation component, a power supply component and a buffer component; The heat dissipation assembly comprises a PCB board (2), a power element (3), a shielding cover (4) and a connector (5); the PCB board (2) is fixedly mounted inside the housing (1); the power element (3) arranged at one end of the PCB board (2) is mounted on the inner side wall of the housing (1); the shielding cover (4) is welded to the lower surface wall of the PCB board (2); and the connector (5) is sleeved on the outer side wall of the housing (1); The power supply assembly comprises an outer iron core (6), an inner iron core (7), a primary winding (8), a secondary winding (9), an epoxy resin (10), a rubber seal (11) and a permanent magnet (12); the outer iron core (6) is arranged inside the shielding cover (4); the inner iron core (7) is arranged inside the outer iron core (6); the primary winding (8) is wound around the outer wall of the inner iron core (7); the secondary winding (9) is wound around the outer wall of the outer iron core (6); the primary winding (8) is located on the outer iron core (6); ) and the inner core (7), the secondary winding (9) is located between the shielding cover (4) and the outer core (6), the shielding cover (4) and the outer core (6) are filled with epoxy resin (10), the epoxy resin (10) wraps the secondary winding (9), a rubber seal (11) is provided on the outer wall of the shielding cover (4), the rubber seal (11) is sealed and connected to the lower surface wall of the outer shell (1), and a permanent magnet (12) is fixedly installed at the bottom of the outer core (6); The buffer assembly comprises an elastic pad (13), an anti-interference resistor (14), an ignition chain spring (15) and a sheath (16); the elastic pad (13) is arranged at the bottom of the permanent magnet (12); the anti-interference resistor (14) is fixedly mounted at one end of the elastic pad (13) away from the permanent magnet (12); the ignition chain spring (15) is mounted at the bottom of the anti-interference resistor (14); the sheath (16) is sealed and connected to the bottom of the shielding cover (4); and the ignition chain spring (15) is arranged inside the sheath (16).

2. The low internal stress automobile ignition coil according to claim 1, characterized in that: Heat dissipation frames (17) are welded at the four corners of the top of the housing (1), a dust cover (18) is fixedly mounted on the top of the heat dissipation frame (17), and heat dissipation fins (19) are embedded on both the front and rear side walls of the housing (1).

3. The low internal stress automobile ignition coil according to claim 1, characterized in that: Mounting columns (20) are welded to both the front and rear side walls of the housing (1), and mounting grounding bolts (21) are screwed into the interiors of both groups of mounting columns (20).

4. The low internal stress automobile ignition coil according to claim 1, characterized in that: The number of winding turns of the primary winding (8) is greater than the number of winding turns of the secondary winding (9), and the coil diameter of the primary winding (8) is smaller than the coil diameter of the secondary winding (9).

5. The low internal stress automobile ignition coil according to claim 2, characterized in that: The size of the dust cover (18) is exactly the same as the size of the top of the outer shell (1); a heat dissipation groove (22) is provided on the top of the outer shell (1); and the length of the heat dissipation groove (22) is smaller than the length of the top of the outer shell (1).

6. The low internal stress automobile ignition coil according to claim 1 or 3, characterized in that: The housing (1) is fixedly mounted on the external engine via a mounting grounding bolt (21) inside the mounting column (20).

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