Shielded cable lap joint adapter structure and cable assembly

Abstract

The application relates to a cable adapter structure, in particular to a shielding cable overlap adapter structure and a cable assembly. The structure comprises a core wire pressing sleeve for pressing two side cables exposed core wires, a bushing for sleeving one side cable outer sheath, the core wire pressing sleeve is used for pressing the conductor and the wire skin of the two side core wires, the core wire pressing sleeve is sleeved with the core wire protection heat shrink tube outside and is heat shrink fixed; the first shielding layer of the bushing sleeved cable is turned outside and is sleeved outside the bushing, the second shielding layer of the other side cable is sleeved on the turned outside first shielding layer, the shielding pressing sleeve is sleeved outside the second shielding layer, the shielding pressing sleeve is located outside the bushing and is pressed on the second shielding layer, the first shielding layer, the bushing and the cable outer sheath, the shielding pressing sleeve and the second shielding layer are sleeved with the cable anti-skid heat shrink tube outside and are heat shrink fixed, and the cable assembly comprises two cable sections connected through the above structure. The application can reduce the length and the outer diameter of the adapter structure and reduce the interference of human factors.

Description

Technical Field

[0001] This invention relates to a cable transition structure, specifically to a shielded cable splicing transition structure and cable assembly. Background Technology

[0002] During maintenance and repair of the data bus cable, a connector is needed to reconnect the twisted-pair shielded cables on both sides of the cable break point. The core wires and shielding must be terminated simultaneously to achieve 360° shielding. Furthermore, since the cable needs to be laid and used on equipment, the laying path requires bending. Therefore, the overlap points need to be relatively flexible to facilitate bending at the overlap points, and possess sufficient tensile strength to prevent breakage.

[0003] To achieve this effect, existing technologies mainly employ two approaches:

[0004] The first method: Use a dead connector to connect the core wire ends on both sides of the break point, then cover the entire area with a wave-shielding sleeve. The wave-shielding sleeve is placed on top of the shielding layer on both sides of the break point. The overlap of the wave-shielding sleeve is tinned to the shielding layer. The entire overlap area is then covered with heat-shrink tubing and heat-shrinked. Figure 1 As shown.

[0005] The second method involves using a dedicated shielded dead connector to transfer the shielded twisted-pair cable. The transfer of the core wires is the same as in the first method, using a dead connector. The shielding is achieved by using a blow-weld type shielding mesh with heat-shrink tubing heated and welded with a hot air gun. Specifically, the two ends of the shielding mesh are fitted onto the shielding layer on both sides of the break point, and pre-placed solder is applied to both ends of the shielding mesh. The pre-placed solder is placed on the outer surface of the shielding layer, and the heat-shrink tubing is used for heat shrink protection.

[0006] The above two methods have the following drawbacks:

[0007] ① In existing technologies, the overlap length at the cable break point is long, and the outer diameter of the cable overlap point is large, making it inconvenient to bend the cable at laying bends. Specifically, the core wire dead joint used for the transition uses a rigid insulating sheath to protect the core wire. The rigid insulating sheath at the core wire transition point, plus the size of the core wire, results in a large outer diameter at the core wire transition point. Due to the large outer diameter at the core wire transition point, the transition positions of each core wire need to be staggered during the transition so that the core wires in the cable can be set according to the standard. The cable contains multiple core wires, and the transition positions of multiple core wires all need to be staggered, resulting in a long overlap length at the cable overlap point. Furthermore, the use of a rigid insulating sheath for protection for each core wire, plus the outer diameter of the core wire, results in an overall excessively large outer diameter at the cable overlap point, making it inconvenient to bend during laying.

[0008] ② Cable shielding mainly achieves electromagnetic shielding. The shielding overlap methods of the first and second methods involve processes that are highly dependent on human labor, such as bundling, soldering, and blow welding. These processes are labor-intensive, not convenient to operate, and not reliable, which is not conducive to automation and thus not conducive to improving production efficiency. Summary of the Invention

[0009] To solve the above-mentioned technical problems, the present invention provides a shielded cable splicing and adapter structure and a cable assembly.

[0010] The objective of this invention is achieved through the following technical solution. A shielded cable splicing and transition structure proposed in this invention includes a core wire crimping sleeve for crimping the exposed core wires of cables on both sides, and a bushing for fitting onto the outer sheath of one side of the cable. The core wire crimping sleeve is used to crimp the conductors and sheaths of the core wires on both sides. A core wire protective heat-shrink tubing is fitted onto the outside of the core wire crimping sleeve and heat-shrinked for fixation. The first shielding layer of the cable fitted onto the bushing is folded outwards and fitted onto the outside of the bushing. The second shielding layer of the cable on the other side is fitted onto the folded-out first shielding layer. A shielding crimping sleeve is fitted onto the outside of the second shielding layer. The shielding crimping sleeve is located outside the bushing and crimped onto the second shielding layer, the first shielding layer, the bushing, and the cable outer sheath. Cable anti-slip heat-shrink tubing is fitted onto the outside of the shielding crimping sleeve and the second shielding layer and heat-shrinked for fixation.

[0011] Furthermore, the inner hole of the core wire crimping sleeve includes a wire crimping hole in the middle that matches the wire and wire sheath crimping holes at both ends that match the wire sheath.

[0012] Furthermore, the sheath is removed from the end of the core wire to expose the conductor, and a stepped shaft is formed at the end of the core wire. The core wire crimping sleeve is a stepped crimping sleeve, and the diameter of the conductor crimping hole is smaller than the diameter of the sheath crimping hole. A step matching the step on the stepped shaft is formed between the conductor crimping hole and the sheath crimping hole.

[0013] Furthermore, when the end of the core wire is inserted into the stepped wire clamping sleeve, it is positioned by a stepped stop engagement.

[0014] Furthermore, the second shielding layer is straightened and then fitted onto the outward-folded first shielding layer.

[0015] Furthermore, the shielding wire sleeve slides past the outside of the second shielding layer and is then fitted onto the outside of the bushing, the first shielding layer, and the second shielding layer.

[0016] Furthermore, the outer wall of the bushing is provided with anti-slip grooves.

[0017] A cable assembly includes two interconnected cable segments connected by a shielded cable overlap transition structure.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] The core wire crimping sleeve of the present invention can ensure the strength of use. Therefore, only a thin and short heat-shrinkable material is used for protection and sealing on the outside of the core wire crimping area. That is, a core wire protective heat-shrinkable tube is applied to the outside of the core wire crimping sleeve after crimping and to the outside of the core wire near the core wire crimping sleeve and then heat-shrinkable. This can effectively shorten the length of the transition structure between the two core wires. The length is more than 30mm shorter than the existing ordinary twisted pair shielded overlap structure.

[0020] The core wire crimping structure (including core wire crimping sleeve and core wire protective heat shrink tubing) in this application is short in length and small in outer diameter. Multiple core wires in the cable adopt the core wire crimping structure, which does not require excessive spacing. This can reduce the overlap length at the cable break point and reduce the outer diameter at the overlap point, making it easier to bend during laying.

[0021] The shielding crimping structure (including bushings and shielding crimp sleeves) enables the conduction and connection of the shielding layers on both sides of the break point, achieving full shielding at the cable termination location. Furthermore, the shielding crimping structure fixes the shielding layers on both sides through crimping, avoiding manual processes such as bundling, soldering, and blow soldering, and is not affected by human factors. The crimping force is controlled by crimping tools, achieving standardization of crimping and ensuring reliable connection.

[0022] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the purpose, features and advantages of the present invention more obvious and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the existing technology for terminating the core wires at the cable break point by using a dead joint, a shielding layer wrapped with a wave-damping sleeve, spot welding, and an outer heat-shrink tubing.

[0024] Figure 2 This is a schematic diagram of the existing technology where the core wires at the cable break point are terminated using a dead joint, the shielding layer is a blow-welded shielding mesh with heat shrink tubing, and pre-placed solder.

[0025] Figure 3 This is a cross-sectional schematic diagram of an embodiment of a shielded cable splicing and transition structure according to the present invention;

[0026] Figure 4 for Figure 3 A cross-sectional schematic diagram of the core wire crimping structure;

[0027] Figure 5 for Figure 3 A cross-sectional schematic diagram of the shielded crimping structure.

[0028] Figure label:

[0029] 1-Core wire,

[0030] 101-Wire,

[0031] 102-line leather,

[0032] 2-Dead connector,

[0033] 3-Shielding layer,

[0034] 4-Breakproof sleeve,

[0035] 5-Heat shrink tubing,

[0036] 6- Blow-welded type shielding mesh with heat shrink tubing,

[0037] 7-Pre-placed solder,

[0038] 8-Cable,

[0039] 9-Shielded crimping structure,

[0040] 901 - First shielding layer

[0041] 902 - Second shielding layer

[0042] 903-Bushing,

[0043] 904-Shielded Wire Crimping Sleeve

[0044] 905 - Anti-slip groove,

[0045] 10- Cable protection heat shrink tubing

[0046] 11-Core wire crimping structure,

[0047] 1101-Stepped Wire Sealing Sleeve

[0048] 11011 - Wire crimp hole

[0049] 11012 - Wire sheath crimping hole

[0050] 1102 - Core wire protection heat shrink tubing

[0051] 12-Outer sheath. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] An embodiment of the shielded cable splicing and transition structure of the present invention is as follows: Figures 3 to 5 As shown, this structure is used to terminate the cable on both sides of the break point of the shielded cable. In this embodiment, a twisted-pair shielded cable is used for illustration, hereinafter referred to as cable 8. Cable 8 has multiple core wires 1 inside, and a shielding layer and an outer sheath 12 are sequentially provided on the outside of the multiple core wires 1.

[0054] The structure used in this invention includes a shielding crimping structure 9, a core wire crimping structure 11, and a cable protective heat shrink tubing 10, as shown below. Figure 3 As shown. The core wire crimping structure 11 includes a stepped crimping sleeve 1101 and a core wire protective heat shrink tubing 1102, as... Figure 4 As shown. The shielding crimping structure 9 includes a bushing 903 and a shielding wire clamping sleeve 904, as... Figure 5 As shown.

[0055] The core wires 1 on both sides of the cable break point are terminated by a core wire crimping structure 11. The core wire 1 includes a conductor 101 and a wire sheath 102 sleeved on the outside of the conductor 101. The core wire crimping structure 11 includes a stepped crimping sleeve 1101 for directly crimping the core wire 1 and a core wire protective heat shrink tubing 1102 for protecting the termination position.

[0056] Remove the sheath 102 from the end of the core wire 1 to expose the conductor 101. The sheath 102 has a certain thickness, so a stepped axis is formed between the sheath 102 and the conductor 101, and a step is formed between the sheath 102 and the conductor 101.

[0057] The ends of the corresponding core wires 1 in the cables on both sides of the cable break point are close together, and stepped wire clamps 1101 are used to cover the ends of the core wires 1 on both sides.

[0058] The stepped wire clamping sleeve 1101 is configured with a stepped structure. The holes inside the stepped wire clamping sleeve 1101 are divided into wire crimping holes 11011 located in the middle and wire insulation crimping holes 11012 located at both ends. The diameter of the wire crimping hole 11011 is smaller than the diameter of the wire insulation crimping hole 11012, so that a step is formed between the wire insulation crimping hole 11012 and the wire crimping hole 11011.

[0059] After the stepped wire clamping sleeve 1101 is fitted onto the ends of the core wires 1 on both sides of the break point, the wire sheath crimping holes 11012 at both ends of the stepped wire clamping sleeve 1101 match the wire sheaths 102 near the ends of the core wires 1, and the wire crimping holes 11011 in the middle of the stepped wire clamping sleeve 1101 match the exposed wires 101 on both sides of the break point. The steps at both ends of the stepped wire clamping sleeve 1101 match the steps on the corresponding core wires 1 at both ends. Then, the stepped wire clamping sleeve 1101 is crimped with a wire clamping tool, so that the wires 101 are crimped in the middle of the stepped wire clamping sleeve 1101 and the wire sheaths 102 are crimped in at both ends, so as to achieve a reliable connection of the core wires 1 on both sides of the break point and the bending resistance after connection.

[0060] The stepped wire clamping sleeve 1101 can realize the electrical connection of the two core wires 1. After the two core wires 1 are connected, the stepped wire clamping sleeve 1101 is simultaneously clamped onto the conductors 101 of the two core wires 1, so as to realize the reliable conduction of the conductors 101. The stepped crimping sleeve 1101 of the present invention simultaneously crimps the conductor 101 and the wire sheath 102. In the prior art, the crimping sleeve only crimps the conductor 101. In order to increase the crimping strength, the crimping sleeve usually has a large outer diameter. A rigid insulating sheath is fitted on the outside of the crimping sleeve. In addition to protecting the crimping position, the rigid insulating sheath also needs to improve the tensile strength of the wire sheaths on both sides. Therefore, the rigid insulating sheath needs to be thickened. Thus, the outer diameter at the crimping position in the prior art is large. The stepped crimping sleeve 1101 of the present invention has a longer mating length with the core wire 1, and the stepped crimping sleeve 1101 fits the core wire 1 as a whole, resulting in higher connection strength. The thickness of the stepped crimping sleeve 1101 can be reduced, and the outer diameter at the crimping position can be reduced. At the same time, the connection strength of the core wires 1 on both sides of the break point of the present invention is higher, and the tensile strength is stronger.

[0061] Therefore, the stepped crimping sleeve 1101 in the core wire crimping structure 11 of the present invention can ensure the strength of use. Thus, only a thin and short heat-shrinkable material is used for protection and sealing on the outer side of the core wire 1 crimping point. That is, a core wire protective heat-shrinkable tube 1102 is fitted on the outer side of the stepped crimping sleeve 1101 after crimping and on the outer side of the core wire 1 near the stepped crimping sleeve 1101 and then heat-shrinked. Figure 4 As shown, it can effectively shorten the length of the transition structure between the two core wires 1, and the length is more than 30mm shorter than the existing ordinary twisted pair shielded overlap structure.

[0062] Therefore, the core wire crimping structure 11 in this application is short in length and small in outer diameter. Multiple core wires 1 in the cable adopt the core wire crimping structure 11, which does not require excessive spacing. This can reduce the overlap length at the cable break point and reduce the outer diameter at the overlap point, making it easier to bend during laying.

[0063] The shielding layers of the cables on both sides of the break point are connected using a shielding crimping structure 9 to achieve the crimping transition of the shielding layers in the cables on both sides, ensuring the conductivity of the shielding layers and the reliability of the connection. The shielding crimping structure includes a bushing 903 and a shielding crimp sleeve 904, such as... Figure 5 As shown.

[0064] After stripping the cable end, the core wire 1 and the shielding layer are exposed. The shielding layer of the cable on one side of the break point is the first shielding layer 901, and the shielding layer of the cable on the other side is the second shielding layer 902.

[0065] The bushing 903 is fitted onto the outer circumference of the cable where the first shielding layer 901 is located. The first shielding layer 901 is folded outward to the outside of the bushing 903 and covers the bushing 903. The second shielding layer 902 is straightened and its end is fitted onto the outside of the folded first shielding layer 901. Then, the shielding crimping sleeve 904 is fitted onto the outside of the end of the second shielding layer 902 and located outside the bushing 903. The shielding crimping sleeve 904 is crimped using a crimping tool to fix the first shielding layer 901 and the second shielding layer 902. At the same time, the first shielding layer 901 and the second shielding layer 902 are fixed between the bushing 903 and the shielding crimping sleeve 904 and fixed on the outer sheath of the cable where the bushing 903 is located.

[0066] The shielding crimping structure 9 enables the conduction and connection of the shielding layers on both sides of the break point, achieving full shielding at the cable termination position. Furthermore, the shielding crimping structure 9 fixes the shielding layers on both sides through crimping, avoiding human-intensive processes such as bundling, soldering, and blow welding. It is not affected by human factors, and the crimping force is controlled by crimping tools, achieving crimping standardization and ensuring reliable connection.

[0067] To increase the bonding strength between the bushing 903 and the shielding layer, the outer wall of the bushing 903 is provided with anti-slip grooves 905. Multiple anti-slip grooves 905 are distributed axially on the outer wall of the bushing 903. After pressing, the shielding layer can be embedded in the anti-slip grooves 905, and the shielding layer is firmly fixed by the anti-slip grooves 905, thereby increasing the tensile strength.

[0068] After the shielding crimping structure 9 is crimped, a cable protection heat shrink tube 10 is fitted on the outside of the break point and heat-shrinked. The cable outer sheath, the shielding crimping structure 9, and the exposed shielding layer near the break point are wrapped inside the cable protection heat shrink tube 10 to achieve protection of the termination position.

[0069] The splicing and connection process of the shielded cable in this invention is summarized as follows:

[0070] Prepare two cable sections on either side of the break point. Place the bushing 903 on the outer sheath 12 of one cable 8 and place the shielding clamp sleeve 904 and the cable protection heat shrink tubing 10 on the outer sheath 12 of the other cable.

[0071] Strip the outer sheath 12 and shielding layer of the cable ends on both sides to a suitable length to expose the core wire 1. Remove the wire insulation 102 at the end of the core wire 1 to expose the conductor 101. First, put the core wire protective heat shrink tubing 1102 on one of the core wires 1. Then, insert the core wires 1 on both sides into the inside of the stepped wire clamping sleeve 1101 at both ends until the step on the core wire 1 abuts against the step inside the stepped wire clamping sleeve 1101 to achieve positioning. After insertion, crimp the core wires and use two stepped wire clamping sleeves 1101 to achieve the transfer of the two core cables. The wire insulation 102 at both ends of the core wires 1 on both sides needs to be crimped through the stepped wire clamping sleeve 1101. After crimping, put the core wire protective heat shrink tubing 1102 on the stepped wire clamping sleeve 1101 and heat shrink it.

[0072] The first shielding layer 901 of the cable fitted under bushing 903 is turned outwards onto the outside of bushing 903. The second shielding layer 902 of the cable on the other side is straightened and fitted onto the outside of the first shielding layer 901 and bushing 903. The shielding clamping sleeve 904 is pushed along the second shielding layer 902 to the outside of the end of the second shielding layer 902 and located outside bushing 903. While pushing the shielding clamping sleeve 904, the second shielding layer 902 is further straightened and flattened. The shielding clamping sleeve 904 is pressed to achieve the clamping and fixing of the shielding layer and to achieve the connection of the shielding layer. The shielding layer is trimmed. The cable protection heat shrink tube 10 is pushed to the outside of the shielding clamping sleeve 904 and the second shielding layer 902 and heat-shrinked to achieve the overlapping and transfer of the shielded cable.

[0073] The splicing and connection process of the cable of the present invention is not limited to the above sequence, and the sequence can be adjusted as needed.

[0074] In another embodiment of the shielded cable splicing and transition structure of the present invention, the stepped wire clamping sleeve 1101 can be replaced with a regular core wire clamping sleeve. The core wire clamping sleeve has a straight hole inside and can be made of a material with good plasticity. During crimping, the core wire clamping sleeve can still be crimped simultaneously with the conductor 101 and the wire sheath 102. Alternatively, the inner diameter of the core wire clamping sleeve gradually decreases from the outside to the inside.

[0075] An embodiment of the present invention provides a cable assembly using the above-described shielded cable overlap transition structure, comprising at least two cable segments, wherein the two interconnected cable segments are overlapped and transitioned through the above-described shielded cable overlap transition structure.

[0076] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shielded cable splicing and transition structure, characterized in that: The system includes a core wire crimping sleeve for crimping the exposed core wires (1) of the cables on both sides to achieve reliable conduction between the core wires on both sides, and a bushing (903) for fitting onto the outer sheath of one side of the cable. The core wire crimping sleeve is used to crimp onto the conductors (101) and sheaths (102) of the core wires (1) on both sides. A core wire protective heat shrink tubing (1102) is fitted on the outside of the core wire crimping sleeve and fixed by heat shrinking. The first shielding layer (901) of the cable fitted by the bushing (903) is turned outward and fitted onto the outside of the bushing (903). The second shielding layer (902) of the cable on the other side is fitted onto the turned outward first shielding layer (901). A shielding crimping sleeve (904) is fitted on the outside of the second shielding layer (902). The shielding crimping sleeve (904) is located outside the bushing (903) and crimped onto the second shielding layer (902) and the first shielding layer (902). 1) On the bushing (903) and the outer sheath of the cable, the cable anti-slip heat shrink tube (10) is fitted on the outside of the shielding crimp sleeve (904) and the second shielding layer (902) and fixed by heat shrinking; the wire insulation (102) is removed from the end of the core wire (1) to expose the conductor (101), and the end of the core wire (1) forms a stepped shaft. The core wire crimp sleeve is a stepped crimp sleeve (1101). The inner hole of the core wire crimp sleeve includes a conductor crimping hole (11011) in the middle that matches the conductor (101) and wire insulation crimping holes (11012) at both ends that match the wire insulation (102). The diameter of the conductor crimping hole (11011) is smaller than the diameter of the wire insulation crimping hole (11012). A step matching the step on the stepped shaft is formed between the conductor crimping hole (11011) and the wire insulation crimping hole (11012).

2. The shielded cable splicing and transition structure according to claim 1, characterized in that: When the end of the core wire (1) is inserted into the stepped wire clamp (1101), it is positioned by step stop engagement.

3. The shielded cable splicing and transition structure according to claim 1, characterized in that: The second shielding layer (902) is straightened and then fitted onto the outward-folded first shielding layer (901).

4. The shielded cable splicing and transition structure according to claim 3, characterized in that: The shielding wire sleeve (904) slides over the outside of the second shielding layer (902) and is then fitted onto the outside of the bushing (903), the first shielding layer (901), and the second shielding layer (902).

5. The shielded cable splicing and transition structure according to claim 1, characterized in that: The bushing (903) has anti-slip grooves on its outer wall.

6. A cable assembly comprising two interconnected cable segments, characterized in that: The two cable segments are connected by the shielded cable splice adapter structure as described in any one of claims 1-5.

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