Ignition coil shell with built-in noise reduction resistor and ignition coil

Abstract

The utility model belongs to the technical field of ignition coils, and particularly relates to an ignition coil shell with a built-in noise reduction resistor, which comprises a shell body and the noise reduction resistor fixed in the shell body through injection molding, the top of the shell body is provided with a mounting groove, the bottom of the shell body is provided with a hollow round rod communicated with the mounting groove, and the hollow round rod is internally provided with an annular groove; the upper end of the noise reduction resistor is sleeved with a lug plate, the end, away from the noise reduction resistor, of the lug plate is used for being connected with a secondary framework of the ignition coil, and the lower end of the noise reduction resistor is installed in an annular groove of the hollow round rod. The technical problems that an existing ignition coil resistor is prone to shaking, poor in insulation effect, prone to creepage and prone to corrosion are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ignition coils, and particularly relates to an ignition coil housing with a noise-reducing resistor built therein and an ignition coil. Background Art

[0002] The ignition coil is one of the key parts of the engine ignition device, providing sufficient energy for the spark plug to generate enough electric sparks and improving the working performance of the engine. The utility model patent with the publication number of CN 206116189 U discloses a top-mounted ignition coil. One end of the socket is connected to the outer housing. An iron core is arranged inside the top end of the outer housing. One end of the iron core is connected to one end of a permanent magnet, and the other end of the permanent magnet is connected to a magnetic conduction component. A primary skeleton is arranged on the outer surface of the iron core. A diode D is arranged on the primary skeleton. A secondary skeleton is arranged on the outer surface of the primary skeleton. The secondary skeleton is connected to a high-voltage conductive column through a connecting piece, and the high-voltage conductive column is connected to a high-voltage resistor.

[0003] When assembling the above top-mounted ignition coil, its high-voltage resistor is usually assembled from the bottom of the outer housing after pouring epoxy resin on the top of the outer housing to connect it to the high-voltage conductive column. After assembly, the high-voltage resistor is prone to shaking, and the insulation effect of the high-voltage resistor is poor, which easily leads to creepage and resistor corrosion. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an ignition coil housing with a noise-reducing resistor built therein and an ignition coil to solve the technical problems of the existing ignition coil resistor being prone to shaking, poor insulation effect, easy creepage, and easy corrosion.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] An ignition coil housing with a noise-reducing resistor built therein includes a housing and a noise-reducing resistor injection-molded and fixed in the housing. An installation groove is provided at the top of the housing, and a hollow round rod communicating with the installation groove is provided at the bottom of the housing. A ring groove is provided in the hollow round rod. A connecting piece is sleeved on the upper end of the noise-reducing resistor. The end of the connecting piece away from the noise-reducing resistor is used to connect to the secondary skeleton of the ignition coil, and the lower end of the noise-reducing resistor is installed in the ring groove of the hollow round rod.

[0007] Further, a fixing block is provided at the bottom of the installation groove of the housing, and the end of the connecting piece away from the noise-reducing resistor is stuck on the fixing block.

[0008] Further, the end of the connecting piece away from the noise-reducing resistor is provided with a first insertion piece extending upward.

[0009] Further, a copper cap and an aluminum cap are respectively provided at the upper and lower ends of the noise-reducing resistor. The connecting piece is connected to the copper cap, and the aluminum cap is installed in the ring groove of the hollow round rod.

[0010] An ignition coil with a built-in noise reduction resistor includes the housing of the ignition coil with the built-in noise reduction resistor described above, and a primary skeleton installed in the housing installation groove. A primary coil is provided on the primary skeleton, and a secondary skeleton is sleeved outside the primary skeleton. A secondary coil is provided on the secondary skeleton. The secondary skeleton is connected to the first insert piece of the connection piece, and epoxy resin is poured around the secondary skeleton, the connection piece, and the noise reduction resistor.

[0011] Further, a slot is provided on the secondary skeleton, and a second insert piece is provided in the slot. The second insert piece is clamped on the first insert piece.

[0012] Compared with the prior art, the present utility model has the following beneficial technical effects:

[0013] For the ignition coil housing and the ignition coil with the built-in noise reduction resistor of the present utility model, the noise reduction resistor is pre-installed and injection-molded in the hollow round rod of the housing in advance, reducing the process of manually assembling the noise reduction resistor. The pre-installation work of the noise reduction resistor is completed through mechanical assembly, improving the assembly consistency. After the assembly is completed, epoxy resin is poured. The epoxy resin is solidified around the connection piece and the noise reduction resistor, which can limit the displacement of the connection piece and the noise reduction resistor, avoid the loosening of the connection piece and the noise reduction resistor, and affect the normal operation of the ignition coil. It can also form an insulating layer outside the noise reduction resistor, improving the insulation performance of the noise reduction resistor, meeting the noise reduction effect, reducing electromagnetic interference and risks such as creepage and corrosion, and improving the performance strength of the ignition coil. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the ignition coil housing with the built-in noise reduction resistor of the present utility model;

[0015] Figure 2 It is a cross-sectional view of the ignition coil housing with the built-in noise reduction resistor of the present utility model;

[0016] Figure 3 It is a cross-sectional view of the ignition coil with the built-in noise reduction resistor of the present utility model. Detailed Embodiment

[0017] The following is further detailed through specific embodiments:

[0018] The reference numerals in the drawings of the specification include:

[0019] Housing 1, installation groove 11, fixing block 12, hollow round rod 13, annular groove 14;

[0020] Noise reduction resistor 2, copper cap 21, aluminum cap 22;

[0021] Connection piece 3, first insert piece 31;

[0022] Primary skeleton 4, primary coil 41;

[0023] Secondary skeleton 5, secondary coil 51, second insert piece 52;

[0024] Epoxy resin 6.

[0025] Embodiment

[0026] As Figure 1-2 As shown, an ignition coil housing with a noise reduction resistor built-in includes a housing 1 and a noise reduction resistor 2 disposed within the housing 1. An installation groove 11 is formed at the top of the housing 1, and a fixing block 12 is provided at the bottom of the installation groove 11. A hollow round rod 13 communicating with the installation groove 11 is formed at the bottom of the housing 1, and an annular groove 14 is formed within the hollow round rod 13; the upper end of the noise reduction resistor 2 is connected to a copper cap 21, a wiring piece 3 is sleeved on the copper cap 21, one end of the wiring piece 3 away from the copper cap 21 is stuck on the fixing block 12, and a first insert piece 31 extending upward is formed, and the first insert piece 31 is used to connect with the secondary skeleton 5 of the ignition coil. The lower end of the noise reduction resistor 2 is connected to an aluminum cap 22, and the aluminum cap 22 is installed in the annular groove 14 of the hollow round rod 13.

[0027] By pre-installing and injecting the noise reduction resistor 2 into the hollow round rod 13 of the housing 1 in advance, the process of manually assembling the noise reduction resistor 2 is reduced, and the pre-installation work of the noise reduction resistor 2 is completed through mechanical assembly, improving its assembly consistency.

[0028] As Figure 3 As shown, an ignition coil with a noise reduction resistor built-in includes the ignition coil housing with a noise reduction resistor built-in described in this embodiment, and a primary skeleton 4 installed in the installation groove 11 of the housing 1. A primary coil 41 is wound around the primary skeleton 4, a secondary skeleton 5 is sleeved outside the primary skeleton 4, a secondary coil 51 is wound around the secondary skeleton 5, a slot is formed on the secondary skeleton 5, and a second insert piece 52 is fixed in the slot. The second insert piece 52 is clamped on the first insert piece 31 of the wiring piece 3, and epoxy resin 6 is poured around the secondary skeleton 5, the wiring piece 3, and the noise reduction resistor 2.

[0029] The assembly process of the ignition coil in this embodiment is as follows: Inject and pre-install the noise reduction resistor 2 into the hollow round rod 13 of the housing 1, then sleeve one end of the wiring piece 3 on the copper cap 21 of the noise reduction resistor 2, and the other end of the wiring piece 3 is stuck on the fixing block 12 of the housing 1; sleeve the secondary skeleton 5 outside the primary skeleton 4 and install it in the installation groove 11 of the housing 1, so that the second insert piece 52 on the secondary skeleton 5 is clamped on the first insert piece 31 of the wiring piece 3. After all components of the ignition coil are assembled, pour epoxy resin 6 into the installation groove 11 of the housing 1, and the epoxy resin 6 solidifies around the secondary skeleton 5, the wiring piece 3, and the noise reduction resistor 2, that is, the assembly work is completed.

[0030] After the epoxy resin 6 is solidified, it can limit the displacement of the terminal piece 3 and the noise reduction resistor 2, avoid the loosening of the terminal piece 3 and the noise reduction resistor 2, and affect the normal operation of the ignition coil. It can also form an insulating layer outside the noise reduction resistor 2, improve the insulation performance of the noise reduction resistor 2, meet the noise reduction effect, reduce the risks of electromagnetic interference, creepage, corrosion, etc., and improve the performance strength of the ignition coil.

[0031] The above are only the embodiments of the present invention, and the well-known specific technical solutions and / or common knowledge such as characteristics in the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. An ignition coil housing with a built-in noise reduction resistor, characterized in that: The invention comprises a shell (1) and a noise reduction resistor (2) fixed in the shell (1) by injection molding, wherein the top of the shell (1) is provided with a mounting groove (11), the bottom of the shell (1) is provided with a hollow round rod (13) connected to the mounting groove (11), and an annular groove (14) is provided in the hollow round rod (13); a wiring piece (3) is sleeved on the upper end of the noise reduction resistor (2), an end of the wiring piece (3) away from the noise reduction resistor (2) is used for connecting to the secondary frame of the ignition coil, and the lower end of the noise reduction resistor (2) is installed in the annular groove (14) of the hollow round rod (13).

2. The ignition coil housing with built-in noise reduction resistor according to claim 1, characterized in that: A fixing block (12) is provided at the bottom of the installation slot (11) of the housing (1), and one end of the connecting piece (3) away from the noise reduction resistor (2) is clamped on the fixing block (12).

3. The ignition coil housing with built-in noise reduction resistor according to claim 1, characterized in that: An end of the connecting piece (3) away from the noise reduction resistor (2) is provided with a first inserting piece (31) extending upward.

4. An ignition coil housing with a built-in noise reduction resistor according to any one of claims 1 to 3, characterized in that: The upper end and the lower end of the noise reduction resistor (2) are respectively provided with a copper cap (21) and an aluminum cap (22), the wiring piece (3) is connected to the copper cap (21), and the aluminum cap (22) is installed in the annular groove (14) of the hollow round rod (13).

5. An ignition coil with a built-in noise reduction resistor, characterized in that: The invention comprises an ignition coil housing with a built-in noise reduction resistor as claimed in claim 3, and a primary frame (4) installed in a mounting groove (11) of a housing (1), a primary coil (41) being provided on the primary frame (4), a secondary frame (5) being sheathed outside the primary frame (4), a secondary coil (51) being provided on the secondary frame (5), the secondary frame (5) being connected to a first plug-in piece (31) of a wiring piece (3), and epoxy resin (6) being poured around the secondary frame (5), the wiring piece (3), and the noise reduction resistor (2).

6. The ignition coil with built-in noise reduction resistor according to claim 5, characterized in that: The secondary frame (5) is provided with a slot, in which a second inserting piece (52) is provided, and the second inserting piece (52) is clamped on the first inserting piece (31).

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