CN220253026U

CN220253026U - Anti-creepage structure of pen-type ignition coil

Info

Publication number: CN220253026U
Application number: CN202321453594.2U
Authority: CN
Inventors: 王林
Original assignee: Changsha Aosky Auto Parts Co ltd
Current assignee: Changsha Aosky Auto Parts Co ltd
Priority date: 2023-06-08
Filing date: 2023-06-08
Publication date: 2023-12-26
Anticipated expiration: 2033-06-08

Abstract

The utility model discloses an anti-creepage structure of a pen-type ignition coil, which comprises a high-voltage framework and a high-voltage winding thereof, a low-voltage framework and a low-voltage winding thereof, a magnetic conduction sleeve and a high-voltage head, wherein gaps among the high-voltage framework, the low-voltage framework and the high-voltage head are filled with epoxy resin; an annular groove is formed in the inner side of the high-pressure head and is positioned between the high-pressure head and the neck of the high-pressure framework; the upper port of the low-pressure framework is provided with an extension part, and the extension part is correspondingly inserted into the annular groove. The utility model has the beneficial effects that the cracking phenomenon of the epoxy resin can be effectively reduced; in addition, the occurrence of creepage phenomenon can be greatly reduced under the condition that cracks appear; therefore, the utility model can effectively reduce the risk of failure of the pen-type ignition coil caused by the creepage phenomenon.

Description

Anti-creepage structure of pen-type ignition coil

Technical Field

The utility model relates to a pen-type ignition coil structure.

Background

As a very mature automobile part, the pen-type ignition coil mainly comprises an iron core, magnetic sheets, a high-voltage framework and a high-voltage winding thereof, a low-voltage framework and a low-voltage winding thereof, a magnetic conduction sleeve, epoxy resin, a shell, a high-voltage head, a low-voltage plug, a high-voltage protection sleeve, a spring, a sealing ring and the like. The high-low voltage framework provides a pressure-resistant framework for winding high-low voltage windings, the magnetic conduction sleeve, the iron core, the magnetic sheets and the like play a role in storing energy, and the epoxy resin fills the inner cavity to play a role in pressure-resistant sealing. The magnetic conduction sleeve and the high-voltage winding are insulated and isolated by epoxy resin.

A disadvantage of the prior art is that the pen-type ignition coil comprises a housing 109, a low voltage bobbin 106, a high voltage protective sheath 108, a spring 107, etc. as shown in fig. 1. A cavity 104 is provided between the high-voltage head 101 and the neck 103 of the high-voltage frame 102, and the cavity 104 is filled with epoxy resin (not shown) for insulation. The pen-type ignition coil has an operating temperature range of-40 to-130 degrees, and the epoxy resin is easy to crack when the temperature changes due to the difference of expansion coefficients of the epoxy resin and the magnetic sleeve 105, especially in the cavity 104, the filled epoxy resin block is larger in volume and more easy to crack. Creepage phenomenon easily occurs between the magnetic conductive sleeve 105 and the high-voltage winding along the cracking part, the creepage path is as shown in an arrow a example in fig. 1, and the high-voltage electricity of the high-voltage winding on the high-voltage skeleton 102 climbs to the magnetic conductive sleeve 105 through the epoxy resin crack of the cavity part 104, thereby causing the failure of the pen-type ignition coil.

Disclosure of Invention

In order to solve the above-mentioned drawback, the technical problem to be solved by the present utility model is to provide an improved structure of a pen-type ignition coil, which effectively reduces the risk of failure of the pen-type ignition coil caused by the creepage phenomenon. In order to solve the technical problems, the technical scheme adopted by the utility model is that the anti-creepage structure of the pen-type ignition coil comprises a high-voltage framework and a high-voltage winding thereof, a low-voltage framework and a low-voltage winding thereof, a magnetic conduction sleeve and a high-voltage head, wherein gaps among the high-voltage framework, the low-voltage framework and the high-voltage head are filled with epoxy resin; the high-pressure head is characterized in that an annular groove is formed in the inner side of the high-pressure head, and the annular groove is positioned between the high-pressure head and the neck of the high-pressure framework; the upper port of the low-pressure framework is provided with an extension part, and the extension part is correspondingly inserted into the annular groove.

The utility model has the beneficial effects that the cracking phenomenon of the epoxy resin can be effectively reduced; in addition, the occurrence of creepage phenomenon can be greatly reduced under the condition that cracks appear; therefore, the utility model can effectively reduce the risk of failure of the pen-type ignition coil caused by the creepage phenomenon.

Preferably, a limiting ring is arranged on the periphery of the low-pressure framework below the extension part. Further, the height of the extension part above the limiting ring is 7-9 mm. In particular 8mm. Is convenient for assembly and positioning.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. When an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Drawings

FIG. 1 is a schematic diagram of the internal structure of a conventional pen-type ignition coil;

fig. 2 is a schematic view of the internal structure of the pen-type ignition coil (combined with a partially enlarged schematic view of the structure) of the embodiment;

fig. 3 is a schematic view of a low-pressure skeleton structure of an embodiment.

Detailed Description

Referring to the drawings, a specific structure of the present utility model is reflected. The anti-creepage structure of the pen-type ignition coil comprises a high-voltage framework 201 and a high-voltage winding thereof, a low-voltage framework 202 and a low-voltage winding thereof, a magnetic conduction sleeve 203, and a high-voltage head 204, wherein gaps among the high-voltage framework 201, the low-voltage framework 202 and the high-voltage head 204 are filled with epoxy resin (not shown in the figure).

An annular groove 205 is formed in the inner side of the Gao Yatou, and the annular groove 205 is positioned between the high-pressure head 204 and the neck 206 of the high-pressure skeleton 201; the upper port of the low pressure backbone 202 has an extension 207, the extension 207 being correspondingly inserted into the annular groove 205.

In an example, a stop ring 208 is provided on the outer periphery of the low-pressure skeleton 202 below the extension 207. In an example, the height H of the extension above the stop collar 208 is 8mm. Is convenient for assembly and positioning.

The main effect of the technical scheme is as follows:

first, through setting up ring channel 205 and cutting apart the cavity portion between high pressure head 204 and the neck 201 of high pressure skeleton 201, reduce the epoxy resin piece volume of packing and its structure of crushing, effectively reduce the fracture phenomenon of epoxy resin and take place.

Second, the extension 207 is inserted into the annular groove 205 to form a creepage barrier for further isolating the contact between the epoxy resin and the magnetic conductive sleeve. Even if the epoxy resin is cracked, the creepage path is greatly prolonged and bent due to the existence of the barrier, the creepage phenomenon can be effectively blocked and inhibited, and the creepage phenomenon is greatly reduced.

The utility model can reduce the risk of failure of the pen-type ignition coil caused by the creepage phenomenon.

The embodiments of the utility model disclosed above are intended only to assist in the description of the utility model. The examples are not intended to be exhaustive or to limit the utility model to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in conjunction with the accompanying drawings in order to best explain the principles of the utility model and the practical application, and to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, it is therefore intended that the utility model be limited only by the claims and the full scope and equivalents thereof, and not by the specific embodiments disclosed.

Claims

1. The anti-creepage structure of the pen-type ignition coil comprises a high-voltage framework and a high-voltage winding thereof, a low-voltage framework and a low-voltage winding thereof, a magnetic conduction sleeve and a high-voltage head, wherein gaps among the high-voltage framework, the low-voltage framework and the high-voltage head are filled with epoxy resin; the high-pressure head is characterized in that an annular groove is formed in the inner side of the high-pressure head, and the annular groove is positioned between the high-pressure head and the neck of the high-pressure framework; the upper port of the low-pressure framework is provided with an extension part, and the extension part is correspondingly inserted into the annular groove.

2. The anti-creepage structure of a pen-type ignition coil as claimed in claim 1, wherein a limit ring is arranged on the periphery of the low-voltage framework below the extension part.

3. The anti-creepage structure of a pen-type ignition coil as claimed in claim 2, wherein the height of the extension part above the limit ring is 7-9 mm.

4. A pen-type ignition coil creepage preventing structure as claimed in claim 3, wherein the height of the extension above the limit ring is 8mm.