CN102867635A

CN102867635A - Ignition coil

Info

Publication number: CN102867635A
Application number: CN2012103599260A
Authority: CN
Inventors: 张克平; 周耀
Original assignee: HUNAN HAIFULAI TECHNOLOGY CO LTD
Current assignee: HUNAN HAIFULAI TECHNOLOGY CO LTD
Priority date: 2012-09-25
Filing date: 2012-09-25
Publication date: 2013-01-09

Abstract

The invention discloses an ignition coil, wherein a shell (6) of the coil is provided with a cylindrical iron core (10). The iron core (10) is provided with a high-voltage winding (7); the high-voltage winding (7) is provided with a low-voltage winding (8); epoxy resin (5) is injected between the low-voltage winding (8) and the shell (6) and between the low-voltage winding (8) and the high-voltage winding (7); the inner cavity bottom of the shell (6) is provided with a annular groove (2) with a U-shaped section; and a high-voltage terminal (1) is plugged in the centre of the annular groove (2). Due to the annular groove (2) with the U-shaped section, the high pressure resistant epoxy resin (5) has more contraction space to surround the high-voltage terminal (1) after injection, so that the high pressure resistant ability is improved. The ignition coil disclosed by the invention is simple in structure and has the following advantages that: 1, the ignition coil is more convenient for batch production, and the cost is reduced; 2, the high pressure resistant ability is improved at least by 20 percent; and 3, the high-voltage terminal is small in size; and the epoxy resin and the shell are prevented from being cracked because of heat-expansion and cold-contraction of the material.

Description

Ignition coil

Technical field

The invention belongs to technical field of engines, relate to a kind of high pressure resistant pen-type ignition coil for the automobile engine take natural gas as fuel.

Background technology

At present, existing automobile engine take natural gas as fuel, because its fuel used calorific value is higher, its igniter is that the structural requirement of automobile-used pen-type ignition coil is also very high.Yet, known this traditional automobile-used pen-type ignition coil, its HV Terminal is divided molded making with its shell and skeleton, make assembly technology complicated, especially make used coil the situation of epoxy resin seepage occur in the embedding process segment, thereby so that the high-voltage resistance capability of coil greatly reduces, not only affect quality, and because the output of substandard product in enormous quantities and significantly improve production cost, and cause the igniting effect of the engine user take the high heating value natural gas as fuel.

Summary of the invention

The technical problem to be solved in the present invention is for the defective that prior art exists, to provide a kind of simple in structure, reasonable in design, more reliable used for natural gas engine ignition coil of igniting effect.

Technical solution of the present invention is that described this ignition coil for natural gas engine referring to Fig. 1, has test tube type shell 6 as shown in Figure 1.These shell 6 upper outside one deck overcoats 9 that are surrounded by.A cylinder-shaped iron core 10 has been coaxially set in the inner chamber of this shell 6.Coaxial line is set with high pressure winding 7 on described iron core 10 cylinders, and this high pressure winding 7 end port at the bottom of described shell 6 inner chamber chambeies is plugged with a mouthful plug 4.Coaxial line is set with a low pressure winding 8 on this high pressure winding 7.Be perfused with epoxy resin 5 in the cavity between this low pressure winding 8 and described shell 6 and the high pressure winding 7.Radially be provided with Low-voltage socket 11 on opening one newel post's face of described shell 6.Its technical characterstic is, coaxial line has cannelure 2 at the bottom of the other end inner chamber chamber of described shell 6 openings one end, these cannelure 2 cell body cross sections are " U " font, go back the coaxial line sealing on the shell 6 of cannelure 2 central authorities and be plugged with a HV Terminal 1, the end of this HV Terminal 1 in described shell 6 is needle-like and is set with resilient sleeve 3, and described HV Terminal 1 is namely axially inserted in the above-mentioned mouthful of plug 4 by needle-like one end with resilient sleeve 3.

By the above ignition coil of the present invention that consists of, because the cannelure 2 that the cross section is " U " font allows and have larger shrink space after high pressure resistant epoxy resin 5 perfusions and hug HV Terminal 1, thereby can make the high-voltage resistance capability of ignition coil be able to abundant raising.So, just realized that shell 6 of the present invention can bear higher voltage, and when Batch assemblage production fire coil, the epoxy resin 5 of perfusion can not leak out yet.

The invention has the beneficial effects as follows, this ignition coil structure that provides is simple, is convenient to produce in enormous quantities with the more and more vigorous demand in the present auto parts machinery of satisfying the market market.Therefore, produce market of the present invention is very wide, and potentiality are very big.This ignition coil is compared with existing traditional automobile ignition coil has following remarkable advantage:

1, according to design of the present invention, can be with HV Terminal directly and shell bottom integrated injection molding, thus more convenient production in enormous quantities reduces production costs;

2, the cross section cannelure that is " U " font allows and has larger shrink space after the high pressure resistant epoxy resin perfusion and hug HV Terminal, thereby can make the high-voltage resistance capability of ignition coil improve at least more than 20%;

3, the HV Terminal volume of ignition coil is little, has avoided because of material expand with heat and contract with cold epoxy resin and the shell of spalling perfusion.

Description of drawings

Fig. 1 is the structural representation of a specific embodiment of ignition coil of the present invention, is denoted as among the figure:

1-HV Terminal,

2-cannelure,

3-resilient sleeve

4-mouthful plug,

5-epoxy resin,

6-shell,

7-high pressure winding,

8-low pressure winding,

9-overcoat,

10-iron core,

11-Low-voltage socket.

Embodiment

Referring to accompanying drawing 1, this embodiment of ignition coil of the present invention PBT plastics of drawing materials makes the test tube type shell 6 that thickness is 1mm, caliber Φ 24mm, long 110mm, stainless steel overcoat 9 of its size of outsourcing one deck and size coupling of shell 6.The shell 6 inner chambers cylinder-shaped iron core 10 that is coaxially set.This iron core 10 adopts commercially available silicon steel to tailor diameter of section Φ 9mm, long 80mm.Coaxial line suit one deck high pressure winding 7 on iron core 10 cylinders, high pressure winding 7 end port at the bottom of shell 6 inner chamber chambeies plugs a mouthful plug 4.On the high pressure winding 7 again coaxial line be set with a low pressure winding 8.In the cavity between low pressure winding 8 and shell 6 and the high pressure winding 7, vacuum degree 200Pa condition lower seal formula is poured into commercially available ordinary epoxy resin 5, to reach the insulating space between low pressure winding 8 and the shell 6 between sealing low pressure winding 8 and the high pressure winding 7.Low-voltage socket 11 adopts commercially available common two pin plugs, and this Low-voltage socket 11 radially is installed on opening one newel post's face of shell 6.Coaxial line is dug a cannelure 2 at the bottom of the other end inner chamber chamber of shell 6 openings one end, makes cannelure 2 cell body cross sections be " U " font.By the HV Terminal of the plant of coaxial line sealing inwardly outward 1, this HV Terminal 1 adopts general cylindrical HV Terminal on the shell 6 of cannelure 2 central authorities.Be sleeved on this HV Terminal 1 is needle-like one end in shell 6 resilient sleeve 3, adopt specification and HV Terminal 1 to be the commercially available general stainless steel resilient sleeve of needle-like one end coupling, needle-like one end is set with the HV Terminal 1 of resilient sleeve 3 and is namely axially inserted in the mouth plug 4 of high pressure winding 7 ports by its needle-like one end.

Entire length by the above ignition coil of the present invention that consists of is 140mm, is proved to be respond well through manufacturing experimently to try out, and reaches designing requirement fully.

Claims

1. ignition coil, has test tube type shell (6), the upper outside one deck overcoat (9) that is surrounded by of this shell (6), a cylinder-shaped iron core (10) has been coaxially set in the inner chamber of this shell (6), coaxial line is set with high pressure winding (7) on described iron core (10) cylinder, this high pressure winding (7) end port at the bottom of described shell (6) inner chamber chamber is plugged with a mouthful plug (4), the upper coaxial line of this high pressure winding (7) is set with a low pressure winding (8), be perfused with epoxy resin (5) in the cavity between this low pressure winding (8) and described shell (6) and the high pressure winding (7), radially be provided with Low-voltage socket (11) on opening one newel post's face of described shell (6), it is characterized in that, coaxial line has cannelure (2) at the bottom of the other end inner chamber chamber of described shell (6) opening one end, this cannelure (2) cell body cross section is " U " font, go back the coaxial line sealing on the shell (6) of cannelure (2) central authorities and be plugged with a HV Terminal (1), the end of this HV Terminal (1) in described shell (6) is needle-like and is set with resilient sleeve (3), and described HV Terminal (1) is namely axially inserted in the above-mentioned mouthful of plug (4) by needle-like one end of band resilient sleeve (3).