High-temperature-resistant cable connector capable of improving shielding efficiency

Abstract

The utility model belongs to the technical field of cable connectors, and mainly relates to a high-temperature-resistant cable connector capable of improving shielding efficiency, the cable connector comprises a plug and a shell, the shell is internally provided with an installation cavity, the installation cavity is internally provided with a conductive lining body, the plug is in threaded connection with the shell and abuts against the conductive lining body, and the conductive lining body is internally provided with an accommodating cavity; a first annular contact part and a second annular contact part are arranged on the cavity wall of the containing cavity, a first laser welding part is arranged on the first annular contact part, and a second laser welding part is arranged on the second annular contact part. In order to ensure a good shielding effect, a traditional crimping structure is changed into a laser welding structure, namely a plurality of laser welding parts, and a plurality of outer shielding layers and a conductive lining body of the cable are subjected to laser welding fixation through the laser welding parts, so that good contact between the plurality of outer shielding layers and the conductive lining body is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of cable connector technology, and mainly relates to a high-temperature resistant cable connector that can improve shielding efficiency. Background Technology

[0002] With the rapid development of my country's aviation and aerospace engineering, the high-temperature requirements of many modules are becoming increasingly stringent. When the operating temperature exceeds the solder wire temperature, solder wire welding structures cannot be used. Furthermore, assembly and crimping structures may experience leakage at high operating frequencies. Therefore, to improve shielding efficiency at high frequencies, a connector-to-cable connection method needs to be designed to meet the requirements of high shielding efficiency. Utility Model Content

[0003] This invention provides a high-temperature resistant cable connector that can improve shielding efficiency, thereby solving the problem of low high-frequency shielding efficiency in existing cable connectors.

[0004] To solve the above problems, the present invention adopts the following technical solution:

[0005] A high-temperature resistant cable connector capable of improving shielding efficiency is disclosed. The cable connector is used to connect a cable having multiple shielding layers, including a first outer shielding layer and a second outer shielding layer. The cable connector includes a plug and a housing threadedly connected to the plug. The housing has a mounting cavity, and a conductive liner is disposed within the mounting cavity. The plug is threadedly connected to the housing and presses against the conductive liner to fix the conductive liner within the mounting cavity. The conductive liner has a receiving cavity for accommodating and fixing the cable.

[0006] The cavity wall has a first annular contact portion for contacting the first outer shielding layer and a second annular contact portion for contacting the second outer shielding layer. The first annular contact portion is provided with a first laser welding portion to circumferentially contact the first outer shielding layer. The first annular contact portion and the first outer shielding layer are fixed together by the first laser welding portion. The second annular contact portion is provided with a second laser welding portion to circumferentially contact the second outer shielding layer. The second annular contact portion and the second outer shielding layer are fixed together by the second laser welding portion.

[0007] It has the following beneficial effects: In order to ensure good shielding effect, the multiple outer shielding layers of the cable cannot be fixed by crimping or other methods. In order to ensure that it can be used at high temperature, traditional solder wire cannot be used for welding. After the process parameters were tested and verified, this structure changed the traditional crimping structure to a laser welding structure, that is, multiple laser welding parts. The multiple outer shielding layers and conductive lining of the cable are fixed by laser welding through the laser welding parts, ensuring good contact between the multiple outer shielding layers and conductive lining.

[0008] Furthermore, the first laser-welded portion wraps around the first annular contact portion at least two times.

[0009] It has the following beneficial effects: it increases the area of ​​laser welding and ensures the stability of the fixed connection.

[0010] Furthermore, the second laser welding portion wraps around the second annular contact portion at least three times.

[0011] It has the following beneficial effects: it increases the area of ​​laser welding and ensures the stability of the fixed connection.

[0012] Furthermore, the conductive liner has a first shell and a second shell, both of which are cylindrical. The outer diameter of the first shell is larger than the outer diameter of the second shell, and the inner diameter of the first shell is larger than the inner diameter of the second shell.

[0013] The first annular contact portion is located at the first shell section, and the second annular contact portion is located at the second shell section.

[0014] Furthermore, the difference between the inner diameter of the first shell segment and the inner diameter of the second shell segment is greater than or equal to twice the wall thickness of the first outer shielding layer.

[0015] Furthermore, the conductive liner includes an outer conductor and a bushing. The first laser welding part and the second laser welding part are both located on the outer conductor. The outer conductor is sleeved on the bushing. The bushing has a first end with an annular protrusion. The annular protrusion presses against one end of the outer conductor to form a stop. The plug is threadedly connected to the housing and presses against the annular protrusion to fix the conductive liner in the mounting cavity.

[0016] Furthermore, the plurality of shielding layers includes an inner shielding layer located inside the second outer shielding layer;

[0017] The annular protrusion has a through groove on the side near the plug, and the inner shielding layer is laser-welded into the through groove.

[0018] It has the following beneficial effects: because the plug and the annular protrusion are pressed together, there will be gaps in the through groove after pressing, and these gaps are leakage points. The leakage is improved by laser welding at the gaps. Attached Figure Description

[0019] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the outer conductor.

[0022] Figure 3 This is the front view of the bushing.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Cable; 2. First outer shielding layer; 3. Second outer shielding layer; 4. Inner shielding layer; 5. Plug; 6. Housing; 7. Mounting cavity; 8. Outer conductor; 9. Bushing; 10. First annular contact; 11. First laser welding part; 12. Second annular contact; 13. Second laser welding part; 14. Receiving cavity; 15. First shell section; 16. Second shell section; 17. Annular protrusion; 18. Through groove. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] The following describes various non-limiting embodiments of this utility model. Any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] In this embodiment, the cable 1 has multiple shielding layers, including a first outer shielding layer 2, a second outer shielding layer 3, and an inner shielding layer 4. The inner shielding layer 4 is located inside the second outer shielding layer 3. That is, the shielding layers of the cable 1 are, from the outside to the inside, the first outer shielding layer 2, the second outer shielding layer 3, and the inner shielding layer 4. The number of outer shielding layers can be determined according to the actual situation of the cable 1.

[0028] Both the inner shielding layer 4 and the outer shielding layer are designed to reduce electromagnetic interference. During the operation of cable 1, it is subject to interference from various internal and external electromagnetic signals. For example, in high-voltage environments such as substations, surrounding electrical equipment generates complex electromagnetic fields. Both the inner shielding layer 4 and the outer shielding layer can ensure the accuracy and stability of signal transmission by isolating the signals inside cable 1 from external interference signals or different signals within cable 1.

[0029] The inner shielding layer 4 is located inside the cable 1, typically between the insulation layer and the conductor. For example, in a high-voltage cross-linked polyethylene cable 1, the inner shielding layer 4 is tightly wrapped around the insulation layer. Its main purpose is to balance the electric field distribution on the conductor surface and prevent the insulation layer from being broken down due to excessively high local electric field strength.

[0030] The outer shielding layer is located at the outermost layer of cable 1 (besides the outer sheath of cable 1). Its main purpose is to shield the internal signals of cable 1 from external interference, such as preventing external radio frequency interference and electrostatic interference. For example, in computer network cable 1, the outer shielding layer can block electromagnetic interference emitted by other surrounding electrical equipment, protecting the integrity of data transmission.

[0031] The inner shielding layer 4 primarily shields the insulation layer from the influence of the electric field generated by the current within the conductor of cable 1. When current flows through the conductor of cable 1, an electric field is generated around it. If this electric field is not uniformly distributed, certain areas within the insulation layer will experience excessively high electric field strength, easily leading to insulation failure. The inner shielding layer 4 ensures a more uniform distribution of the electric field, thus protecting the insulation layer.

[0032] The outer shielding layer primarily protects against electromagnetic interference from the external environment that could affect the signals transmitted inside cable 1. For example, in industrial plants, there are numerous motors, frequency converters, and other equipment that generate electromagnetic interference. The outer shielding layer can prevent these interfering signals from entering cable 1 and affecting signal quality.

[0033] like Figure 1 , Figure 2 As shown, a high-temperature resistant cable connector with improved shielding efficiency is disclosed. The cable connector is used to connect cable 1 and includes a plug 5 and a housing 6 threadedly connected to the plug 5. The plug 5 is used to plug into another socket. The housing 6 has a mounting cavity 7, within which a conductive liner is provided. The conductive liner is made of a conductive material and can be laser-welded to the outer shielding layer of cable 1. The plug 5 is threadedly connected to the housing 6 and presses against the conductive liner to fix the conductive liner within the mounting cavity 7. The conductive liner has a receiving cavity 14 for accommodating and fixing cable 1. In this embodiment, the plug 5 contains a conductive material, which presses against the conductive liner when the plug 5 is threaded onto the housing 6.

[0034] The cavity wall of the receiving cavity 14 has a first annular contact portion 10 for contacting the first outer shielding layer 2 and a second annular contact portion 12 for contacting the second outer shielding layer 3. The first annular contact portion 10 is provided with a first laser welding portion 11 to circumferentially contact the first outer shielding layer 2, and the first annular contact portion 10 and the first outer shielding layer 2 are fixed together by the first laser welding portion 11. The second annular contact portion 12 is provided with a second laser welding portion 13 to circumferentially contact the second outer shielding layer 3, and the second annular contact portion 12 and the second outer shielding layer 3 are fixed together by the second laser welding portion 13. One end of the cable 1 is stripped to expose the first outer shielding layer 2, the second outer shielding layer 3, and the inner shielding layer 4. The end of the cable 1 is inserted into the receiving cavity 14 of the conductive liner. Using a laser welding device, the first annular contact portion 10 of the conductive liner is laser welded together with the first outer shielding layer 2 on the outside of the conductive liner. Then, the second annular contact portion 12 of the conductive liner is laser welded together with the second outer shielding layer 3, thereby achieving the fixation between the conductive liner and the cable 1.

[0035] To ensure good shielding performance, the multiple outer shielding layers of cable 1 cannot be fixed by crimping or other methods. To ensure use at high temperatures, traditional solder wire welding cannot be used either. After verifying the process parameters, this structure replaces the traditional crimping structure with a laser welding structure, i.e., multiple laser welding parts. The multiple outer shielding layers and conductive liner of cable 1 are laser welded and fixed through the laser welding parts, ensuring good contact between the multiple outer shielding layers and the conductive liner.

[0036] In this embodiment, the first laser welding part 11 wraps around the first annular contact part 10 at least two times. The second laser welding part 13 wraps around the second annular contact part 12 at least three times. By increasing the area of ​​laser welding, the stability of the fixed connection is ensured.

[0037] In this embodiment, the conductive liner has a first shell 15 and a second shell 16, both of which are cylindrical. The outer diameter of the first shell 15 is larger than the outer diameter of the second shell 16, and the inner diameter of the first shell 15 is larger than the inner diameter of the second shell 16. A first annular contact portion 10 is located at the first shell 15, and a second annular contact portion 12 is located at the second shell 16. This perfectly matches the diameter of the stripped cable 1.

[0038] In this embodiment, the difference between the inner diameter of the first shell 15 and the inner diameter of the second shell 16 is greater than or equal to twice the wall thickness of the first outer shielding layer 2. This allows the interior of the first shell 15 and the interior of the second shell 16 to accommodate the first outer shielding layer 2.

[0039] The conductive liner includes an outer conductor 8 and a bushing 9. The first laser welding part 11 and the second laser welding part 13 are both located on the outer conductor 8. The outer conductor 8 is sleeved on the bushing 9. The bushing 9 has a first end with an annular protrusion 17. The annular protrusion 17 presses against one end of the outer conductor 8 to form a stop, so that the bushing 9 is located at one end of the outer conductor 8. The plug 5 is threaded to the housing 6 and presses against the annular protrusion 17 to fix the conductive liner in the mounting cavity 7.

[0040] like Figure 3 As shown, the annular protrusion 17 has a through groove 18 on the side near the plug 5, and the inner shielding layer 4 is laser-welded into the through groove 18. Because the plug 5 and the annular protrusion 17 are pressed together, a gap will exist at the through groove 18 after pressing. The gap is a leakage point, and the leakage is improved by welding at the gap.

[0041] The optimized product structure significantly improves shielding efficiency. The crimped structure assembly achieves a shielding efficiency of -60dB at 67GHz, while the optimized laser-welded cable assembly achieves -80dB at the same frequency. This demonstrates that changing from a crimped structure to a laser-welded structure reduces interference signal intensity by a factor of 10.

Claims

1. A high-temperature resistant cable connector capable of improving shielding efficiency, the cable connector being used to connect a cable having multiple shielding layers, the multiple shielding layers including a first outer shielding layer and a second outer shielding layer, characterized in that, The cable connector includes a plug and a housing threadedly connected to the plug. The housing has a mounting cavity and a conductive liner inside the mounting cavity. The plug is threadedly connected to the housing and presses against the conductive liner to fix the conductive liner inside the mounting cavity. The conductive liner has a receiving cavity for accommodating and fixing the cable. The cavity wall has a first annular contact portion for contacting the first outer shielding layer and a second annular contact portion for contacting the second outer shielding layer. The first annular contact portion is provided with a first laser welding portion to circumferentially contact the first outer shielding layer. The first annular contact portion and the first outer shielding layer are fixed together by the first laser welding portion. The second annular contact portion is provided with a second laser welding portion to circumferentially contact the second outer shielding layer. The second annular contact portion and the second outer shielding layer are fixed together by the second laser welding portion.

2. The high-temperature resistant cable connector with improved shielding efficiency according to claim 1, characterized in that, The first laser welding part wraps around the first annular contact part at least two times.

3. A high-temperature resistant cable connector with improved shielding efficiency according to claim 2, characterized in that, The second laser welding part wraps around the second annular contact part at least three times.

4. A high-temperature resistant cable connector with improved shielding efficiency according to claim 3, characterized in that, The conductive liner has a first shell and a second shell, both of which are cylindrical. The outer diameter of the first shell is larger than the outer diameter of the second shell, and the inner diameter of the first shell is larger than the inner diameter of the second shell. The first annular contact portion is located at the first shell section, and the second annular contact portion is located at the second shell section.

5. A high-temperature resistant cable connector with improved shielding efficiency according to claim 4, characterized in that, The difference between the inner diameter of the first shell segment and the inner diameter of the second shell segment is greater than or equal to twice the wall thickness of the first outer shielding layer.

6. A high-temperature resistant cable connector with improved shielding efficiency according to claim 5, characterized in that, The conductive liner includes an outer conductor and a bushing. The first laser welding part and the second laser welding part are both located on the outer conductor. The outer conductor is sleeved on the bushing. The bushing has a first end with an annular protrusion. The annular protrusion presses against one end of the outer conductor to form a stop. The plug is threadedly connected to the housing and presses against the annular protrusion to fix the conductive liner in the mounting cavity.

7. A high-temperature resistant cable connector with improved shielding efficiency according to claim 6, characterized in that, The plurality of shielding layers include an inner shielding layer, which is located inside the second outer shielding layer; The annular protrusion has a through groove on the side near the plug, and the inner shielding layer is laser-welded into the through groove.

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