Shell welding overhead ignition coil

Abstract

A shell welding overhead ignition coil comprises an upper shell and a lower shell connected to the lower portion of the upper shell, a low-voltage head is installed on the side of the upper shell, an ignition module is installed on the inner side of the low-voltage head, a high-voltage head is arranged at the bottom of the lower shell, a high-voltage sheath is installed on the high-voltage head, and a coil assembly is arranged between the upper shell and the lower shell. Wherein the inner edge of the lower end face of the upper shell extends downwards to form a circle of strip-shaped welding part, the top end of the welding part inclines towards the outer side to form a triangular convex edge, the welding part is dissolved through ultrasonic waves so that the upper shell can be welded to the lower shell, and when the welding part is dissolved, the triangular convex edge pulls the welding part to topple towards the outer side. According to the product, the coil shell is sealed by using an ultrasonic welding process, a triangular rib bulge is designed on the outer side of the welding part of the upper shell, ultrasonic waves are concentrated on a triangular vertex part in the welding process, the effect is obvious, welding is facilitated, welding marks of the shell can be remained on the inner side of a triangular inclined surface, and the influence on the appearance can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of ignition coil structure. BACKGROUND

[0002] In automobile engine ignition system, ignition coil is a kind of executive component for providing ignition energy for igniting the air and fuel mixture in engine cylinder. It is a kind of special pulse booster based on electromagnetic induction principle, it makes 8-16V low voltage according to set frequency on-off and make 20-40KV voltage in secondary to produce electric spark through spark plug. The utility model patent with application No.201810931477.X discloses a kind of top-mounted single cylinder independent ignition coil, including high-pressure rod, high-pressure rod has passageway inside, high-pressure spring is arranged in passageway, the bottom of high-pressure rod has high-pressure connection end, the top of high-pressure rod has interconnection end;Mounting shell is connected at interconnection end, mounting shell has opening towards side, a drawer structure is installed in opening, drawer mechanism includes frame body, coil assembly, low pressure head, coil assembly includes T-shaped core pressed from powder metallurgy, PI insulating layer covering on the core column of T-shaped core, primary winding wound on PI insulating layer, secondary skeleton set outside primary winding, secondary winding wound on secondary skeleton, and mouth-shaped core pressed from powder metallurgy arranged outside T-shaped core, T-shaped core bottom surface and mouth-shaped core inner wall are attracted together by a rare earth magnet, low pressure head has a substrate, substrate is provided with ignition module, low voltage tab connected by resistance welding. Since the ignition coil of the structure adopts integrated shell design, the precision of installation cannot be guaranteed during assembly, thereby leading to various product hidden troubles. SUMMARY

[0003] In order to solve the shortcomings of the prior art, the purpose of the utility model is to provide a shell fusion top-mounted ignition coil with high installation precision.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of: a shell fusion top-mounted ignition coil, comprising an upper shell and a lower shell connected below the upper shell, a low pressure head is installed on the side of the upper shell, an ignition module is installed on the inner side of the low pressure head, the bottom of the lower shell has a high pressure head, a high pressure jacket is installed on the high pressure head, a coil assembly is arranged between the upper shell and the lower shell;Among them, the inner edge of the lower end surface of the upper shell extends downward to form a ring-shaped fusion part in the form of a strip, the top end of the fusion part is inclined outward to form a triangular convex rib, the upper shell is fused to the lower shell by ultrasonic dissolution, when dissolved, the triangular convex rib pulls the fusion part to tilt outward.

[0005] As a further improvement, the outer edge of the lower shell is formed with a flange upwardly, which covers the welding trace of the welding portion.

[0006] As a further improvement, the coil assembly comprises a T-shaped core, a primary skeleton sleeved outside the T-shaped core, a secondary skeleton sleeved on the primary skeleton, a first C-shaped core and a second C-shaped core arranged around outside the secondary skeleton, the first C-shaped core and the second C-shaped core are combined together to form an O shape and connected to the end of the T-shaped core.

[0007] As a further improvement, the outer part of the first C-shaped core and the second C-shaped core is respectively covered with a buffer cover, the top of the buffer cover of the first C-shaped core and the second C-shaped core respectively extends upwardly to form an arc-shaped upper cover, which covers the upper part of the secondary skeleton.

[0008] As a further improvement, a plurality of reinforcing ribs are arranged on the surface of the upper cover.

[0009] As a further improvement, the second C-shaped core is provided with a grounding tab by laser welding, and the grounding tab is connected to the ignition module.

[0010] As a further improvement, the top surface of the T-shaped core is adsorbed together with the first C-shaped core and the second C-shaped core by a magnetic sheet.

[0011] As a further improvement, the primary skeleton is wound with a primary winding, and the primary skeleton is provided with a primary connecting tab connected to the primary winding, and the primary connecting tab is connected to the ignition module.

[0012] As a further improvement, the secondary skeleton is wound with a secondary winding, and the secondary skeleton is provided with a high-voltage diode and a negative high-voltage tab connected to the secondary winding, and the high-voltage diode is connected to the ignition module.

[0013] As a further improvement, the bottom of the coil assembly is provided with a negative high-voltage connector and a suppression resistor, one end of the negative high-voltage connector is connected above the suppression resistor, and the other end is connected to the negative high-voltage tab in the vertical direction.

[0014] Due to the above technical scheme, the product uses ultrasonic welding process to seal the coil shell, the outer side of the upper shell welding portion is designed with a triangular rib protrusion, the ultrasonic wave is concentrated at the triangular apex during the welding process, which is obviously beneficial to the welding, and the shell welding trace will remain inside the triangular inclined surface, which can avoid affecting the appearance. BRIEF DESCRIPTION OF DRAWINGS

[0015] FIG. 2 is a perspective view of a housing fusion top-mounted ignition coil according to the present utility model; Figure 1 FIG. 3 is an exploded view of a housing fusion top-mounted ignition coil according to the present utility model;

[0016] FIG. 4 is a partial enlarged view of a fusion portion of a housing fusion top-mounted ignition coil according to the present utility model; Figure 2 FIG. 5 is a schematic view of a buffer cover of a housing fusion top-mounted ignition coil according to the present utility model.

[0017] FIG. 6 is a partial enlarged view of a fusion portion of a housing fusion top-mounted ignition coil according to the present utility model; Figure 3 FIG. 7 is a schematic view of a buffer cover of a housing fusion top-mounted ignition coil according to the present utility model.

[0018] FIG. 8 is a partial enlarged view of a fusion portion of a housing fusion top-mounted ignition coil according to the present utility model; Figure 4 FIG. 9 is a schematic view of a buffer cover of a housing fusion top-mounted ignition coil according to the present utility model. DETAILED DESCRIPTION

[0019] Hereinafter, terms used in the specification will be briefly described, and embodiments will be described in detail. All terms used herein, including descriptive terms or technical terms, should be interpreted to have meanings understood by those of ordinary skill in the art. However, the terms can have different meanings according to the intention of those of ordinary skill in the art, precedents, or the emergence of new technologies.

[0020] In addition, some terms can be selected by the applicant, and in this case, the meaning of the selected term will be described in detail in the detailed description of the embodiments. Therefore, the terms used herein must be defined based on the meaning of the terms along with the description in the entire specification. In addition, when a component "includes" or "comprises" an element, unless there is a specific description contrary thereto, the component can further include other elements, not excluding the other elements. In the following description, terms such as "component" and "module" indicate a unit for processing at least one function or operation, wherein the unit and module can be implemented as hardware or software or by combining hardware and software.

[0021] Embodiments will now be described more fully with reference to the accompanying drawings. Embodiments, however, can be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that the disclosure will be thorough and complete, and will fully convey the concept of the embodiments to those skilled in the art. In the following description, well-known functions or constructions are not described in detail because they would obscure the embodiments with unnecessary detail and, throughout the specification, like reference numerals refer to like elements throughout.

[0022] FIG. 2 is a perspective view of a housing fusion top-mounted ignition coil according to the present utility model; Figure 1The utility model discloses a shell fusion top -mounted ignition coil's perspective view, the shell fusion top -mounted ignition coil in this embodiment, including upper shell 1 and the lower shell 2 of being connected in the lower of upper shell 1, the lateral installation of upper shell 1 has low pressure head 3, the inside installation of low pressure head 3 has ignition module 4, the bottom of lower shell 2 has high pressure head 21, and high pressure head 21 is installed high pressure sheath 5, and the coil assembly is arranged between upper shell 1 and lower shell 2.

[0023] The utility model discloses a shell fusion top -mounted ignition coil's perspective view, the shell fusion top -mounted ignition coil in this embodiment, including upper shell 1 and the lower shell 2 of being connected in the lower of upper shell 1, the lateral installation of upper shell 1 has low pressure head 3, the inside installation of low pressure head 3 has ignition module 4, the bottom of lower shell 2 has high pressure head 21, and high pressure head 21 is installed high pressure sheath 5, and the coil assembly is arranged between upper shell 1 and lower shell 2. Figure 2 The utility model discloses a shell fusion top -mounted ignition coil's perspective view, the shell fusion top -mounted ignition coil in this embodiment, including upper shell 1 and the lower shell 2 of being connected in the lower of upper shell 1, the lateral installation of upper shell 1 has low pressure head 3, the inside installation of low pressure head 3 has ignition module 4, the bottom of lower shell 2 has high pressure head 21, and high pressure head 21 is installed high pressure sheath 5, and the coil assembly is arranged between upper shell 1 and lower shell 2.

[0024] The second C-shaped core 65 is connected to the ignition module 4 by laser welding the grounding tab 67. The product has a grounding tab added to the core, which is connected to the core using a laser welding process, and then the grounding lead on the module is connected, which is firm and reliable and can effectively reduce the interference of induced voltage generated during the coil operation on the coil.

[0025] The primary skeleton 62 is wound with a primary winding, and the primary skeleton 62 is provided with a primary connecting piece 621 connected to the primary winding, and the primary connecting piece 621 is connected to the ignition module 4. The secondary skeleton 63 is wound with a secondary winding, and the secondary skeleton 63 is provided with a high-voltage diode 631 and a negative high-voltage tab 632 connected to the secondary winding, and the high-voltage diode 631 is connected to the ignition module 4. The bottom of the coil assembly is provided with a negative high-voltage connector 7 and a suppression resistor 8, one end of the negative high-voltage connector 7 is connected above the suppression resistor 8, and the other end is connected to the negative high-voltage tab 632 in the vertical direction.

[0026] The utility model discloses a shell fusion top -mounted ignition coil's perspective view, the shell fusion top -mounted ignition coil in this embodiment, including upper shell 1 and the lower shell 2 of being connected in the lower of upper shell 1, the lateral installation of upper shell 1 has low pressure head 3, the inside installation of low pressure head 3 has ignition module 4, the bottom of lower shell 2 has high pressure head 21, and high pressure head 21 is installed high pressure sheath 5, and the coil assembly is arranged between upper shell 1 and lower shell 2. Figure 3The utility model discloses a partial enlarged view of the fusion part of the shell fusion top ignition coil, and the inner edge of the lower end face of the upper shell 1 extends downward to form a strip-shaped fusion part 11, the top end of the fusion part 11 is inclined outward to form a triangular rib 12, and the fusion part 11 is fused to the lower shell 2 by ultrasonic dissolution. The assembly process sequence of the coil is as follows: the low-pressure head with the module is assembled into the upper shell, the coil subassembly (primary, secondary, core and magnetic sheet) is assembled into the upper shell and placed into the ultrasonic welding jig hole with the opening upward, the lower shell with the suppression resistance and negative high-voltage plug is assembled onto the coil upper shell assembly with the lower shell high-voltage tower upward, and finally the ultrasonic fusion is performed on the ultrasonic welding equipment to fuse the upper and lower shells into one. The product is sealed by the ultrasonic fusion process, the outer side of the fusion part of the upper shell is designed with a triangular rib protrusion, the ultrasonic wave is concentrated at the triangular apex during the fusion process, therefore, the triangular rib 12 is melted fastest and then drags the fusion part 11 to pour outward, the effect is obvious and beneficial to fusion, the shell fusion mark is left on the inner side of the triangular inclined surface, the outer edge of the lower shell 2 is formed with a covering edge 21 upward, and the covering edge 21 wraps the fusion mark of the fusion part 11 to avoid affecting the appearance.

[0027] attached Figure 4 The utility model discloses a buffer cover of the shell fusion top ignition coil, and the outer part of the first C-shaped core 64 and the second C-shaped core 65 is wrapped with the buffer cover respectively, the top of the buffer cover of the first C-shaped core 64 and the second C-shaped core 65 is respectively extended to form an arc-shaped upper cover 66, the upper cover 66 covers the secondary framework 63, the outline of the upper cover 66 is designed according to the secondary framework structure trend, so that the resin around the primary and secondary windings is distributed uniformly. A plurality of reinforcing ribs 661 are arranged on the surface of the upper cover 66 at intervals, so that the local resin distribution thickness can be avoided, and in addition, the resin cracking caused by the excessive adhesion between the shell material and the resin can be avoided.

[0028] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should typically be considered as being applicable in other embodiments. While one or more embodiments have been described with reference to the figures, it will be understood by those of ordinary skill in the art that various changes in form and details can be made therein without departing from the spirit and scope as defined by the following claims.

Claims

1. A shell fusion top-mounted ignition coil, characterized by: The utility model provides a low -voltage head (3) is installed to the side of upper shell (1), the inside of low -voltage head (3) is installed with ignition module (4), the bottom of lower shell (2) has high -voltage head (21), high -voltage head (21) is installed with high -voltage sheath (5), and coil assembly is arranged between upper shell (1) and lower shell (2), wherein the inner edge of the lower end surface of upper shell (1) extends downward and forms a strip-shaped fusion part (11), the top end of fusion part (11) is inclined outward and forms a triangular convex rib (12), and the upper shell (1) is fused to the lower shell (2) by ultrasonic dissolution, when dissolving, the triangular convex rib (12) pulls the fusion part (11) to tilt outward.

2. The shell fusioned-on ignition coil according to claim 1, characterized in that: The outer edge of the lower shell (2) is formed upward to form a package edge, which covers the fusion mark of the fusion part (11).

3. The shell fusioned-on ignition coil according to claim 1, characterized in that: The coil assembly (6) includes a T-shaped core (61), a primary skeleton (62) sleeved outside the T-shaped core (61), a secondary skeleton (63) sleeved on the primary skeleton (62), a first C-shaped core (64) and a second C-shaped core (65) arranged around the outside of the secondary skeleton (63), and the first C-shaped core (64) and the second C-shaped core (65) are combined together to form an O shape and connected to the end of the T-shaped core (61).

4. The shell fusioned overhead ignition coil of claim 3, wherein: The outer part of the first C-shaped core (64) and the second C-shaped core (65) is respectively covered by a buffer cover, the top of the buffer cover of the first C-shaped core (64) and the second C-shaped core (65) is respectively extended upward to form an arc-shaped upper cover (66), and the upper cover (66) covers the upper part of the secondary skeleton (63).

5. The shell fusioned overhead ignition coil of claim 4, wherein: A plurality of reinforcing ribs (661) are arranged on the surface of the upper cover (66) at intervals.

6. The shell fusioned overhead ignition coil of claim 3, wherein: The second C-shaped core (65) is connected to the ignition module (4) by laser welding a grounding tab (67).

7. The shell fusioned overhead ignition coil of claim 3, wherein: The top surface of the T-shaped core (61) and the first C-shaped core (64) and the second C-shaped core (65) are adsorbed together by a magnetic sheet (68).

8. The shell fusioned-on ignition coil according to claim 3, characterized in that: The primary skeleton (62) is wound with a primary winding, the primary skeleton (62) is provided with a primary connecting tab (621) connected to the primary winding, and the primary connecting tab (621) is connected to the ignition module (4).

9. The shell fusioned-on ignition coil according to claim 3, characterized in that: The secondary skeleton (63) is wound with a secondary winding, the secondary skeleton (63) is provided with a high-voltage diode (631) and a negative high-voltage tab (632) connected to the secondary winding, and the high-voltage diode (631) is connected to the ignition module (4).

10. The shell fusioned-on ignition coil according to claim 9, characterized in that: The bottom of the coil assembly is provided with a negative high voltage connector (7) and a suppression resistor (8), one end of the negative high voltage connector (7) is connected above the suppression resistor (8), and the other end is connected to the negative high voltage tab (632) in the vertical direction.

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