Shielding structure of electrical connector and assembly method thereof

Abstract

The present invention relates to a shielding structure of an electrical connector, wherein a shielding braided conductor is clamped between the conical outer surface of the tail of a shielding conductive metal shell and the conical inner surface of a shielding clamping shell, and the shielding braided conductor and the shielding conductive metal shell are fastened and connected by means of conical surface clamping. Assembly: The shielding braided conductor is directly and evenly wrapped on the conical outer surface of the tail of the shielding conductive metal shell, and the shielding braided conductor is pressed against the conical outer surface of the tail of the shielding conductive metal shell through the conical inner surface of the shielding clamping shell. The tightening screw uses the axial pre-tightening force converted from its torque to move the conical inner surface of the shielding clamping shell axially along the conical outer surface of the tail of the shielding conductive metal shell, continuously reducing the gap between the conical outer surface of the tail of the shielding conductive metal shell and the conical inner surface of the shielding clamping shell, thereby achieving connection and connection from the shielding braided conductor to the shielding circuit of the mounting metal box.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicles, and in particular to a shielding structure of an electric connector and an assembly method thereof. Background Art

[0002] With the rapid development of new energy electric vehicles, electric vehicles have gradually shifted from commercial vehicles and logistics vehicles to passenger vehicles. Electric passenger vehicles are increasingly favored by customers because of their environmental protection and better user experience. With the increasing popularity of electric passenger vehicles, customers are paying more and more attention to passenger vehicles and have higher and higher performance requirements. Among them, electromagnetic shielding is becoming more and more important due to its special properties. As an important part of the electric vehicle shielding system, the shielding effect of the electrical connector is directly related to the performance of the shielding system. However, the shielding performance of the electrical connectors currently on the market is mainly concentrated in the fixed combination of the shielding braid and the connector, which is not satisfactory.

[0003] CN201710890881.2 discloses a cable assembly and an electrical connector. Its purpose is to provide a cable assembly and an electrical connector that can reliably fix the shielding braid of the cable without damaging the shielding braid of the cable, thereby improving the electromagnetic shielding effect of the electrical connector. The shielding braid of the cable can be clamped more tightly between the tapered outer circumference of the gasket and the tapered inner circumference of the tubular connector to prevent the shielding braid of the cable from separating from the tubular connector. The technical solution: The cable assembly includes: a cable and a tubular connector, which is sleeved on the cable. The cable assembly also includes a gasket, which is sleeved on the cable and accommodated in the tubular connector. The shielding braid of the cable is flipped backward onto the gasket; the gasket has a tapered outer circumference, and the tubular connector has a tapered inner circumference. The shielding braid of the cable can be squeezed and fixed between the tapered outer circumference of the gasket and the tapered inner circumference of the tubular connector. Its shortcomings are:

[0004] (1) Shielding braiding assembly process: The shielding braid of the cable is turned back onto the gasket, causing the shielding braid mouth to be opposite to the assembly direction, which makes it easy to cause the shielding braid to be scattered when assembling the cylindrical connector, or to fix the shielding braid mouth, which makes the processing technology complicated.

[0005] (2) Shield braid tightening principle: The shield braid is connected to the inner shell of the terminal assembly through a threaded cylindrical connector, thereby continuously shrinking the gap between the conical outer surface of the gasket and the conical inner surface of the cylindrical connector, thereby continuously compressing the shield braid.

[0006] (3) Force analysis of shielding braiding: The conical inner surface of the cylindrical connector moves both axially and rotates around the axis. During the fixing and clamping process, the shielding braiding is subjected to axial friction, pressure perpendicular to the conical surface, and rotational friction along the axis. Therefore, the shielding braiding is easy to become disordered during the fixing and clamping process, resulting in uneven force on the shielding braiding and broken wires.

[0007] (4) Scope of application: Applicable only to shielded cables. Summary of the Invention

[0008] The technical problem solved by the present invention is to overcome the deficiencies in the above-mentioned prior art and provide a shielding structure of an electrical connector that realizes the connection of a shielding loop from a shielded braided conductor to a mounting metal box. Another technical problem solved by the present invention is to provide a method for assembling the shielding of an electrical connector for a new energy vehicle, which is firmly connected to the shielding braiding and will not crush or break the shielding braiding, or the shielding braiding is firmly combined with the electrical connector and does not loosen, thereby ensuring that the shielding loop connection is effective and does not leak. Another technical problem solved by the present invention is to provide a method for assembling the shielding structure of an electrical connector, which utilizes conical surface tightening to realize the fastening and conduction of the shielding braided conductor and the shielding conductive metal shell, and the shielding loop connection from the shielding braided conductor to the mounting metal box.

[0009] The technical solution of the present invention is the shielding structure of the electrical connector, which is special in that it includes a shielding conductive metal shell, a shielding clamping shell and a shielding braided conductor. The tail of the shielding conductive metal shell is provided with a conical outer surface, and the shielding clamping shell is provided with a conical inner surface. The shielding braided conductor is clamped between the conical outer surface of the tail of the shielding conductive metal shell and the conical inner surface of the shielding clamping shell, and the shielding braided conductor and the shielding conductive metal shell are tightened and connected by the conical surface.

[0010] Preferably, the cone angle of the inner surface of the shielding clamping shell is the same as the cone angle of the tail end of the shielding conductive metal shell.

[0011] Preferably, the shielding structure is further provided with a mounting metal box, and the mounting metal box is connected and conducted with the shielding conductive metal shell to realize a shielding loop connection between the shielding conductive metal shell and the mounting metal box.

[0012] Preferably, the shielding structure is further provided with a mounting metal box, and the mounting metal box is connected and conducted with the shielding conductive metal shell through a conducting component, thereby realizing a shielding loop connection between the shielding conductive metal shell and the mounting metal box.

[0013] Preferably, the first fastening screw passes through the screw holes at both ends of the shielded conductive metal shell and the mounting metal box to fix the shielded conductive metal shell on the mounting metal box; the second fastening screw passes through the screw holes at both ends of the shielded conductive metal shell and the shielded clamping shell to fix the shielded clamping shell on the shielded conductive metal shell.

[0014] Another technical solution of the present invention is an assembly method of the electrical connector shielding structure, which is special in that it includes the following steps:

[0015] (1) The shielded braided conductor is clamped between the tapered outer surface of the tail of the shielded conductive metal shell and the tapered inner surface of the shielded clamping shell, and the shielded braided conductor is pressed against the tapered outer surface of the tail of the shielded conductive metal shell through the tapered inner surface of the shielded clamping shell, and the shielded braided conductor and the shielded conductive metal shell are tightened and connected by the tapered surface;

[0016] (2) The second fastening and tightening screw passes through the screw holes at both ends of the shielded conductive metal shell and the shielded tightening shell, and the axial pre-tightening force converted by the screw torque causes the conical inner surface of the shielded tightening shell to move axially along the conical outer surface of the tail of the shielded conductive metal shell, continuously reducing the gap between the conical outer surface of the tail of the shielded conductive metal shell and the conical inner surface of the shielded tightening shell, thereby continuously compressing the shielded braided conductor and fixing the shielded tightening shell on the shielded conductive metal shell; the second fastening and tightening screw realizes the fastening and conduction of the shielded braided conductor and the shielded conductive metal shell;

[0017] (3) The first fastening screw passes through the screw holes at both ends of the shielded conductive metal shell and the mounting metal box, and fixes the shielded conductive metal shell on the mounting metal box, so that the shielded conductive metal shell and the mounting metal box are directly connected and conductive. The first fastening screw realizes the connection and conduction from the shielded braided conductor to the mounting metal box shielding loop.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) In the present invention, the shielded braided conductor is directly and evenly wrapped on the tail conical outer surface of the shielded conductive metal shell, and there is no need to process the braiding. The process operation is simple and effectively avoids shield leakage at the connection between the shielded braided conductor and the shielded conductive metal shell caused by the shielded braided conductor being spread out.

[0020] (2) In the present invention, the shielded braided conductor is fixed in the gap between the tail conical outer surface of the shielded conductive metal shell and the conical inner surface of the shielded clamping shell, so that the shielded braided conductor is evenly stressed, avoiding single wire being stressed and causing wire breakage.

[0021] (3) The present invention adopts a conical surface tightening method to effectively increase the contact area between the shielded braided conductor and the shielded conductive metal shell, reduce the shielding contact resistance, and achieve 360° shielding.

[0022] (4) The present invention adopts a conical surface tightening method to adjust the fixing force between the shielded braided conductor and the shielded conductive metal shell by adjusting the installation torque of the tightening screw, thereby preventing the shielded braided conductor from being pulled off.

[0023] (5) The present invention adopts a conical surface tightening method to ensure the consistency of the fixing force between the shielded braided conductors of different finished products and the shielded conductive metal shell by adjusting the installation torque of the tightening screws, effectively absorbing the manufacturing errors of parts and the assembly errors of finished products, thereby preventing the shielded braided conductors from being broken due to insufficient compression or overpressure.

[0024] (6) In the shielding braiding assembly process of the present invention, the shielding braided conductor is directly and evenly wrapped on the tapered outer surface of the tail of the shielding conductive metal shell along the conical surface from small to large from the tail of the shielding conductive metal shell, and the processing technology is simple.

[0025] (7) The tightening principle of the shielded braided conductor of the present invention is that the axial pre-tightening force converted from the screw torque by the tightening screw causes the conical inner surface of the shielded tightening shell to move axially along the tail conical outer surface of the shielded conductive metal shell, and continuously reduces the gap between the tail conical outer surface of the shielded conductive metal shell and the conical inner surface of the shielded tightening shell, thereby continuously compressing the shielded braided conductor.

[0026] (8) The force analysis of the shielded braided conductor of the present invention shows that the conical inner surface of the shielding clamping shell only moves axially along the tail conical outer surface of the shielding conductive metal shell. During the fixing and clamping process, the shielded braided conductor is only subjected to the friction force along the axial direction and the pressure perpendicular to the conical surface. Therefore, the shielded braided conductor will not be scattered during the fixing and clamping process, ensuring that the braiding force is uniform.

[0027] (9) The application scope of the present invention is that it can be applied to both shielded wires and non-shielded wires with an external shielding braided mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structural assembly of the shielding structure of the electrical connector of the present invention;

[0029] Figure 2 It is a schematic diagram of the structural decomposition of the shielding structure of the electrical connector of the present invention;

[0030] Figure 3 yes Figure 1 sectional view of;

[0031] Figure 4 yes Figure 3 A partial enlarged view of middle A;

[0032] Figure 5 yes Figure 3 A magnified partial view of B.

[0033] Description of main component symbols:

[0034] The conical outer surface 11 of the shielded conductive metal shell 1 shields the pressing shell 2

[0035] The conical inner surface 21 shields the braided conductor 3 and mounts the metal box 4

[0036] First fastening screw 51 screw hole 52 second fastening screw 53

[0037] Screw hole 54 DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings:

[0039] See also Figure 1 、 Figure 2 As shown, the shielding structure of the electrical connector includes a shielding conductive metal shell 1, a shielding clamping shell 2 and a shielding braided conductor 3. The tail of the shielding conductive metal shell 1 is provided with a conical outer surface 11, and the shielding clamping shell 2 is provided with a conical inner surface. The shielding braided conductor 3 is clamped between the conical outer surface 11 at the tail of the shielding conductive metal shell and the conical inner surface 21 of the shielding clamping shell and is tightened and connected to the shielding braided conductor 3 by the conical surface.

[0040] In this embodiment, the cone angle of the inner surface of the shielding and tightening shell 2 is the same as the cone angle of the tail portion of the shielding and conductive metal shell 1 .

[0041] See also Figure 1 、 Figure 2 、 Figure 3 As shown, the shielding structure is further provided with a mounting metal box 4, which is connected and conducted with the shielding conductive metal shell 1 to realize a shielding loop connection between the shielding conductive metal shell 1 and the mounting metal box 4. In another embodiment, the mounting metal box 4 is connected and conducted with the shielding conductive metal shell 1 through a conducting component (not shown in the figure).

[0042] See also Figure 1 、 Figure 2 、 Figure 3As shown, the first fastening screw 51 passes through the screw holes 52 at both ends of the shielded conductive metal shell 1 and the mounting metal box 4 to fix the shielded conductive metal shell 1 on the mounting metal box 4; the second fastening screw 53 passes through the screw holes 54 at both ends of the shielded conductive metal shell 1 and the shielded clamping shell 2 to fix the shielded clamping shell 2 on the shielded conductive metal shell 1.

[0043] See also Figures 1 to 5 As shown, the assembly method of the electrical connector shielding structure includes the following steps:

[0044] (1) The shielded braided conductor 3 is sandwiched between the tapered outer surface 11 of the tail end of the shielded conductive metal shell and the tapered inner surface 21 of the shielded clamping shell, and the shielded braided conductor 3 is pressed against the tapered outer surface 11 of the tail end of the shielded conductive metal shell by the tapered inner surface 21 of the shielded clamping shell, and the fastening and conduction of the shielded braided conductor 3 and the shielded conductive metal shell 1 are achieved by the tapered surface clamping;

[0045] (2) The second fastening and tightening screw 53 passes through the screw holes 54 at both ends of the shielded conductive metal shell 1 and the shielded tightening shell 2. The axial pre-tightening force converted by the torque of the screw 53 causes the conical inner surface 21 of the shielded tightening shell to move axially along the conical outer surface 11 of the tail of the shielded conductive metal shell, and continuously reduces the gap between the conical outer surface 11 of the tail of the shielded conductive metal shell and the conical inner surface 21 of the shielded tightening shell, thereby continuously compressing the shielded braided conductor 3 and fixing the shielded tightening shell 2 on the shielded conductive metal shell 1; the second fastening and tightening screw 53 realizes the fastening and conduction of the shielded braided conductor 3 and the shielded conductive metal shell 1;

[0046] (3) The first fastening screw 51 passes through the screw holes 52 at both ends of the shielded conductive metal shell 1 and the mounting metal box 4, and fixes the shielded conductive metal shell 1 on the mounting metal box 4, so that the shielded conductive metal shell 1 and the mounting metal box 4 are directly connected and conductive. The first fastening screw 51 realizes the connection and conduction of the shielding loop from the shielded braided conductor 3 to the mounting metal box 4.

[0047] The above descriptions are merely preferred embodiments of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.

Claims

1. A shielding structure of an electrical connector, characterized in that: The invention comprises a shielded conductive metal shell, a shielded clamping shell, a shielded braided conductor and a second fastening and clamping screw. The tail of the shielded conductive metal shell is provided with a conical outer surface and a first bottom which is obtuse at an angle to the conical outer surface. The shielded clamping shell is provided with a conical inner surface and a second bottom which is obtuse at an angle to the conical inner surface. The entire fixing portion of the shielded braided conductor is clamped between the conical outer surface of the tail of the shielded conductive metal shell and the conical inner surface of the shielded clamping shell. The second fastening and clamping screw is passed through the screw holes of the first bottom and the second bottom, and the screw torque is adjusted. The converted axial pre-tightening force can cause the conical inner surface of the shielding clamping shell to move axially along the conical outer surface of the tail end of the shielding conductive metal shell, so as to continuously reduce the gap between the conical outer surface of the tail end of the shielding conductive metal shell and the conical inner surface of the shielding clamping shell, thereby continuously compressing the shielding braided conductor, and fixing the shielding clamping shell on the shielding conductive metal shell to achieve the fastening and conduction of the shielding braided conductor and the shielding conductive metal shell through conical surface tightening; during the tightening process, the shielding braided conductor is only subjected to friction along the axial direction and pressure perpendicular to the conical surface; At the entire fixed portion where the shielded braided conductor is clamped, the slopes of the conical outer surface and the conical inner surface remain unchanged, and the conical angle of the inner surface of the shielded clamping shell is the same as the conical angle of the tail of the shielded conductive metal shell, so that when the axial preload force converted by the screw torque is adjusted, the conical inner surface and the conical outer surface both apply force to the fixed portion perpendicularly in the same direction.

2. The shielding structure of the electrical connector according to claim 1, characterized in that: The shielding structure is further provided with a mounting metal box, which is connected and conducted with the shielding conductive metal shell to achieve a shielding loop connection between the shielding conductive metal shell and the mounting metal box.

3. The shielding structure of the electrical connector according to claim 1, characterized in that: The shielding structure is further provided with a mounting metal box, which is connected and conducted with the shielding conductive metal shell through a conducting component, thereby realizing a shielding loop connection between the shielding conductive metal shell and the mounting metal box.

4. The shielding structure of the electrical connector according to claim 2 or 3, characterized in that: The first fastening screw passes through the screw holes at both ends of the shielding conductive metal shell and the mounting metal box to fix the shielding conductive metal shell on the mounting metal box.

5. A method for assembling an electrical connector shielding structure, characterized in that: The following steps are involved: (1) The entire fixed portion of the shielded braided conductor is clamped between the tapered outer surface of the tail end of the shielded conductive metal shell and the tapered inner surface of the shielded clamping shell. At the entire fixed portion where the shielded braided conductor is clamped, the slopes of the tapered outer surface and the tapered inner surface remain unchanged, and the tapered angle of the inner surface of the shielded clamping shell is the same as the tapered angle of the tail end of the shielded conductive metal shell. The shielded braided conductor is pressed against the tapered outer surface of the tail end of the shielded conductive metal shell by the tapered inner surface of the shielded clamping shell, and the tapered surface is used to clamp the shielded braided conductor and the shielded conductive metal shell to achieve fastening and conduction. During the fastening process, the shielded braided conductor is only subjected to friction along the axial direction and pressure perpendicular to the tapered surface. (2) The tail of the shielded conductive metal shell is provided with a first bottom which forms an obtuse angle with the conical outer surface, and the shielded clamping shell is provided with a second bottom which forms an obtuse angle with the conical inner surface. By passing a second fastening clamping screw through the screw holes of the first bottom and the second bottom and adjusting the axial pre-tightening force converted by the torque of the screw, the conical inner surface of the shielded clamping shell can be moved axially along the conical outer surface of the tail of the shielded conductive metal shell, and the gap between the conical outer surface of the tail of the shielded conductive metal shell and the conical inner surface of the shielded clamping shell can be continuously reduced, thereby continuously compressing the shielded braided conductor and fixing the shielded clamping shell on the shielded conductive metal shell, so that when the axial pre-tightening force converted by the torque of the screw is adjusted, the conical inner surface and the conical outer surface can both apply force to the fixed part in the same direction perpendicular to the fixing part; the second fastening clamping screw realizes the fastening and conduction of the shielded braided conductor and the shielded conductive metal shell; (3) The first fastening screw passes through the screw holes at both ends of the shielded conductive metal shell and the mounting metal box, and fixes the shielded conductive metal shell on the mounting metal box, so that the shielded conductive metal shell and the mounting metal box are directly connected and conductive. The first fastening screw realizes the connection and conduction from the shielded braided conductor to the mounting metal box shielding loop.

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