Copper bar inductance structure capable of preventing magnetic core from falling off under high-frequency vibration

Abstract

The utility model discloses a copper bar inductance structure capable of preventing magnetic cores from falling off under high-frequency vibration, which comprises a copper bar body, a first magnetic core and a second magnetic core, the first magnetic core and the second magnetic core are oppositely buckled on the copper bar body to form a magnetic ring, a first soft silica gel sheet is arranged between the first magnetic core and the copper bar body, and a second soft silica gel sheet is arranged between the second magnetic core and the copper bar body. Silica gel adhesives are dispensed on the front and back surfaces of the first soft silica gel sheet and the second soft silica gel sheet, so that the first magnetic core is adhered to the first soft silica gel sheet and the copper bar body, and the second magnetic core is adhered to the second soft silica gel sheet and the copper bar body. The silica gel adhesive is an adhesive with the fracture elongation rate of more than 200% and the tensile strength of 4-6 Mpa. And a first groove and a second groove are respectively formed in the opposite buckling surfaces of the first magnetic core and the second magnetic core. The soft silica gel is used as a bonding medium, bonding can be kept in the high-frequency vibration process, meanwhile, the good elastic buffering effect is achieved, and the copper bar inductor magnetic core used in the high-frequency vibration working condition environment is not prone to falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic components, in particular to an EMC filtering copper bus inductor in the vehicle field. Background Art

[0002] Usually, EMC filtering magnetic components, such as copper busbar inductors, copper busbar link bridges and inductors with magnetic cores. The copper busbar is usually in the shape of a flat square, made of pure copper or copper alloy. The magnetic core is bonded to the upper and lower sides of the copper busbar to form a special inductor. After adding the magnetic core, it can effectively suppress the high-frequency interference signal of the current. However, the current technical problem is that the magnetic core is bonded to the copper busbar. The traditional solution is to use epoxy glue to bond it to the copper busbar on one side, and the copper busbar and the whole device are connected by screws or welding. After the epoxy glue is cured, it is also a hard connection medium. The entire copper busbar, magnetic core, and whole device form a rigid connection. After the rigid connection is formed, it is easy to cause resonance between the magnetic core and the copper busbar under various harsh working conditions of the vehicle. The resonance will increase the vibration magnitude, which can easily cause the magnetic core and the copper busbar to fall off, or even the magnetic core to be shattered, resulting in the failure of the copper busbar inductor. For this reason, it is necessary to optimize and improve the installation and fixation of the magnetic core of the existing copper busbar inductor. Utility Model Content

[0003] In view of this, the utility model proposes a copper busbar inductor structure that prevents the magnetic core from falling off under high-frequency vibration, so as to solve the connection problem between the magnetic core and the copper busbar link bridge while being able to withstand high-frequency vibration without falling off or breaking.

[0004] The technical solution disclosed by the utility model is a copper busbar inductor structure for preventing a magnetic core from falling off under high-frequency vibration. The structure comprises a copper busbar body, a first magnetic core and a second magnetic core which are buckled on the copper busbar body to form a magnetic ring, a first soft silicone sheet is arranged between the first magnetic core and the copper busbar body, and a second soft silicone sheet is arranged between the second magnetic core and the copper busbar body, and silicone adhesive is dotted on the front and back surfaces of the first soft silicone sheet and the second soft silicone sheet to achieve bonding of the first magnetic core with the first soft silicone sheet and the copper busbar body, and bonding of the second magnetic core with the second soft silicone sheet and the copper busbar body.

[0005] Preferably, the silicone adhesive has a breaking elongation greater than 200% and a tensile strength of 4 to 6 MPa.

[0006] Furthermore, the facing surfaces of the first magnetic core and the second magnetic core are respectively provided with a first groove and a second groove, and the first groove and the second groove form a cavity for buckling the first soft silicone sheet, the copper busbar body and the second soft silicone sheet.

[0007] Furthermore, the first soft silicone sheet is bonded to the bottom surface of the first groove, and the second soft silicone sheet is bonded to the bottom surface of the second groove.

[0008] Furthermore, the transition edges between the groove bottom and the groove wall of the first groove and the second groove are set as inner chamfered arc edges.

[0009] Preferably, the first soft silicone sheet is bonded to the overall surface of the first magnetic core corresponding to the first groove, and the second soft silicone sheet is bonded to the overall surface of the second magnetic core corresponding to the second groove. When the first magnetic core and the second magnetic core are buckled, the bottom surface of the first magnetic core on both sides of the first groove and the top surface of the second magnetic core on both sides of the second groove are bonded by the first soft silicone sheet and the second soft silicone sheet.

[0010] Furthermore, a corrosion-resistant oxide film layer is electroplated on the surface of the copper busbar body.

[0011] The beneficial effects of the utility model are as follows: a magnetic ring is formed by bonding them to the copper busbar body by buckling them in opposite directions, and a first soft silicone sheet and a second soft silicone sheet are added at the bonding point as intermediate bonding media. Since the silicone adhesive of the soft silicone sheet has the characteristics of a breaking elongation rate greater than 200% and a tensile strength of 4 to 6 MPa, the problems of high-frequency vibration fatigue, easy falling off or breaking caused by the traditional magnetic core directly bonding to the copper busbar with epoxy glue can be solved, thereby improving the reliability of the product.

[0012] Because soft silicone has strong adhesion and good heat resistance, it can meet the high temperature of 200 degrees. At the same time, it can meet the safety and reliability of products under different harsh working conditions of -40℃ ~ 155℃.

[0013] In addition, the process of dispensing glue is also adopted, and the process operation is simple and mature, and the production is automated. Compared with the scheme of installing elastic fasteners, this scheme is relatively low in cost. Silicone has strong adhesion, softness, elasticity and anti-aging properties. As an adhesive medium, it can maintain adhesion during high-frequency vibration and play a good elastic buffering role. It can solve the problem that the copper busbar inductor core used in the working environment of high-frequency vibration is easy to fall off and break. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the copper busbar inductor structure decomposition of the utility model.

[0015] Figure 2 It is a three-dimensional diagram of the overall structure of the copper busbar inductor structure of the present invention.

[0016] Figure 3 This is a schematic diagram of an embodiment in which a first soft silicone sheet is bonded to a first magnetic core and a second soft silicone sheet is bonded to a second magnetic core.

[0017] Figure 4 The present invention is a schematic diagram of another embodiment in which a first soft silicone sheet is bonded to a first magnetic core and a second soft silicone sheet is bonded to a second magnetic core. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present disclosure, rather than all embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present disclosure.

[0019] Please refer to Figures 1 to 4 , a copper busbar inductor structure for preventing the magnetic core from falling off under high-frequency vibration provided by the technical solution, includes a copper busbar body 1, a first magnetic core 2 and a second magnetic core 3 that are buckled on the copper busbar body 1 to form a magnetic ring, a first soft silicone sheet 4 is arranged between the first magnetic core 2 and the copper busbar body 1, and a second soft silicone sheet 5 is arranged between the second magnetic core 3 and the copper busbar body 1, and silicone adhesive is dotted on the front and back surfaces of the first soft silicone sheet 4 and the second soft silicone sheet 5 to achieve bonding of the first magnetic core 2 with the first soft silicone sheet 4 and the copper busbar body 1, and bonding of the second magnetic core 3 with the second soft silicone sheet 5 and the copper busbar body 1.

[0020] Preferably, the silicone adhesive has a tensile strength of 4-6 Mpa and a tensile rate of greater than 200%. The adhesive is used to bond the first soft silicone sheet 4 and the second soft silicone sheet 5 at the copper busbar body 1 where the first magnetic core 2 and the second magnetic core 3 are bonded. The first soft silicone sheet 4 and the second soft silicone sheet 5 are bonded as a bonding sandwich layer, and the vibration resistance is enhanced by taking advantage of the characteristics of silicone.

[0021] Preferably, the facing surfaces of the first magnetic core 2 and the second magnetic core 3 are respectively provided with a first groove 21 and a second groove 31, and the first groove 21 and the second groove 31 form a cavity for buckling the first soft silicone sheet 4, the copper bar body 1 and the second soft silicone sheet 5. By providing the first groove 21 and the second groove 31 as positioning grooves for buckling the copper bar body 1, it is also beneficial for the end surfaces of the first magnetic core 2 and the second magnetic core 3 to butt against each other.

[0022] Reference Figure 3 As one embodiment, the first soft silicone sheet 4 is bonded to the bottom surface of the first groove 21, and the second soft silicone sheet 5 is bonded to the bottom surface of the second groove 31, that is, the size of the first soft silicone sheet 4 is the same as the size of the bottom of the first groove 21, and the size of the second soft silicone sheet 5 is the same as the bottom surface of the second groove 31.

[0023] Preferably, the transition edge between the bottom and the wall of the first groove 21 and the second groove 31 is set as an inner chamfered arc edge 01. The inner chamfered arc edge 01 will allow the adhesive overflowing from the two sides of the bonding first soft silicone sheet 4 and the second soft silicone sheet 5 to enter the inner chamfered arc edge 01 and the side wall of the copper busbar body 1, forming an adhesive protective glue for the side walls of the first groove 21 and the second groove 31.

[0024] Reference Figure 4 As another embodiment, the first soft silicone sheet 4 is bonded to the overall surface of the first magnetic core 2 corresponding to the first groove 21, and the second soft silicone sheet 5 is bonded to the overall surface of the second magnetic core 3 corresponding to the second groove 31. When the first magnetic core 2 and the second magnetic core 3 are buckled, the bottom surface of the first magnetic core 2 on both sides of the first groove 21 and the top surface of the second magnetic core 3 on both sides of the second groove 31 are bonded by the first soft silicone sheet 4 and the second soft silicone sheet 5. The bonding effect achieved by this scheme is better.

[0025] Preferably, the surface of the copper busbar body 1 is plated with a corrosion-resistant oxide film layer, and a unique 1Ts inductor is formed after being assembled with the first magnetic core 2 and the second magnetic core 3. The first groove 21 of the first magnetic core 2 and the second groove 31 of the second magnetic core 3 cooperate with the space of the copper busbar body 1. The magnetic core itself generates a magnetic field during operation. The size and position of the magnetic core and the copper busbar are effectively coordinated, which can better serve as an EMC filter.

[0026] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A copper busbar inductor structure for preventing the magnetic core from falling off under high frequency vibration, characterized in that: The invention comprises a copper bar body (1), a first magnetic core (2) and a second magnetic core (3) which are buckled on the copper bar body (1) to form a magnetic ring, a first soft silicone sheet (4) is arranged between the first magnetic core (2) and the copper bar body (1), and a second soft silicone sheet (5) is arranged between the second magnetic core (3) and the copper bar body (1), and silicone adhesive is applied on the front and back surfaces of the first soft silicone sheet (4) and the second soft silicone sheet (5) to achieve bonding of the first magnetic core (2) with the first soft silicone sheet (4) and the copper bar body (1), and bonding of the second magnetic core (3) with the second soft silicone sheet (5) and the copper bar body (1).

2. The copper busbar inductor structure for preventing the magnetic core from falling off under high frequency vibration according to claim 1, characterized in that: The silicone adhesive has a breaking elongation greater than 200% and a tensile strength of 4 to 6 MPa.

3. The copper busbar inductor structure for preventing the magnetic core from falling off under high frequency vibration according to claim 1, characterized in that: The facing surfaces of the first magnetic core (2) and the second magnetic core (3) are respectively provided with a first groove (21) and a second groove (31), and the first groove (21) and the second groove (31) form a cavity for locking the first soft silicone sheet (4), the copper busbar body (1) and the second soft silicone sheet (5).

4. The copper busbar inductor structure for preventing the magnetic core from falling off under high frequency vibration according to claim 3, characterized in that: The first soft silicone sheet (4) is bonded to the bottom surface of the first groove (21), and the second soft silicone sheet (5) is bonded to the bottom surface of the second groove (31).

5. The copper busbar inductor structure for preventing the magnetic core from falling off under high frequency vibration according to claim 3, characterized in that: The edges where the groove bottoms and groove walls of the first groove (21) and the second groove (31) transition are configured as inner chamfered arc edges (01).

6. The copper busbar inductor structure for preventing the magnetic core from falling off under high frequency vibration according to claim 5, characterized in that: The first soft silicone sheet (4) is bonded to the overall surface of the first magnetic core (2) corresponding to the first groove (21), and the second soft silicone sheet (5) is bonded to the overall surface of the second magnetic core (3) corresponding to the second groove (31). When the first magnetic core (2) and the second magnetic core (3) are buckled together, the bottom surface of the first magnetic core (2) on both sides of the first groove (21) and the top surface of the second magnetic core (3) on both sides of the second groove (31) are bonded via the first soft silicone sheet (4) and the second soft silicone sheet (5).

7. The copper busbar inductor structure for preventing the magnetic core from falling off under high frequency vibration according to claim 1, characterized in that: The surface of the copper busbar body (1) is electroplated with a corrosion-resistant oxide film layer.

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