A type of extrusion cable anchor joint

Abstract

This utility model provides a compression-type cable anchoring joint, belonging to the field of cable anchoring technology. It includes two locking plates symmetrically arranged on the outer sides of the joint position of two cable cores to form a split-type locking mechanism. A semi-circular groove is formed on the side of each locking plate closest to the cable core. When the two locking plates are combined, the two semi-circular grooves form a circular groove. Each end of the locking plate has a semi-conical compression surface, which, when combined, forms a conical compression surface. Locking sleeves are fitted onto both ends of the locking mechanism through the conical compression surface. The interior of each locking sleeve has a conical cavity matching the conical compression surface. When the two locking sleeves are closed, they together enclose the locking mechanism. This utility model offers convenient and efficient installation, reliable and uniform fixing, good sealing and protection, strong environmental adaptability, low cost, and long service life.

Description

Technical Field

[0001] This utility model relates to the field of cable anchoring technology, and in particular to a compression cable anchoring joint. Background Technology

[0002] Cables are wire products used to transmit electrical (magnetic) energy, information, and to convert electromagnetic energy. In a broad sense, cables are also simply referred to as wires and cables. In a narrow sense, cables refer specifically to insulated cables, which can be defined as: an assembly consisting of one or more insulated cores, and their respective possible sheaths, overall protective layers, and outer protective layers. Cables may also have additional uninsulated conductors. Currently, the traditional cable connection method is explosive bonding, which, due to its high cost, low efficiency, and safety hazards, is gradually becoming unable to meet the needs of modern engineering.

[0003] In the prior art, Chinese patent CN214478133U discloses a cable sealing and fixing connection device, including a locking sleeve and a cable. The cable is provided with a sealing and fixing connection mechanism, which includes an extrusion member, a locking seat, and a locking sealing ring. The outer wall of the locking sleeve is threaded, the upper end of the locking sleeve is provided with an extrusion member, and the inner side of the upper end of the locking sleeve is provided with a locking sealing ring. The extrusion member includes an extrusion sleeve and a locking plate. The upper end of the extrusion sleeve is circumferentially arrayed with locking plates. The lower end face of the extrusion sleeve abuts against the upper end face of the locking sleeve and the upper end face of the locking sealing ring. The locking plates are axially arranged and inclined. The locking seat is provided with an extrusion conical hole. The locking seat passes through the cable and is sleeved on the locking plate, the extrusion sleeve, and the locking sleeve, and is threadedly connected to the locking sleeve to achieve a sealing and fixing connection between the locking seat, the locking sleeve, and the cable.

[0004] While the aforementioned connection device addresses some of the problems of traditional connections to a certain extent, it still has the following shortcomings in actual use: First, the threaded connection structure requires precise alignment of the thread profile, making the installation process cumbersome, especially in confined spaces where operation is difficult, time-consuming, and labor-intensive; second, while multi-layer sealing structures (such as locking rings and O-rings) improve sealing performance, they also increase the number of components and assembly complexity, leading to higher manufacturing costs. Furthermore, the sealing rings may fail due to aging after long-term use, affecting connection reliability; third, the locking plates of this device adopt a circumferential array structure, requiring axial compression deformation for fixation, which places extremely high demands on the thread precision of the locking seat. If the threads are worn or unevenly stressed, the cable may not be securely fixed, and there is even a risk of loosening and falling off. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of existing cable connection devices, such as complex structure, difficult operation, and poor sealing and locking effects, and to provide a compression-type cable anchoring joint.

[0006] This utility model is achieved through the following technical solution: a compression-type cable anchoring joint, comprising two locking plates symmetrically arranged on the outer side of the joint position of two cable cores to form a split locking mechanism capable of pressing the cable cores; a semi-circular groove is provided on the side of the locking plate near the cable core, and when the two locking plates are combined, the two semi-circular grooves form a circular groove coaxial with the cable core; a semi-conical compression surface is provided at both ends of the locking plate, and when the two locking plates are combined, the two semi-conical compression surfaces form a conical compression surface; locking sleeves are respectively fitted at both ends of the locking mechanism through the conical compression surface, and the interior of the locking sleeve has a conical cavity matching the conical compression surface, and when the two locking sleeves are closed, the two locking sleeves together enclose the locking mechanism.

[0007] The split locking mechanism of this connector eliminates the need for threaded tightening, completing installation through a pure extrusion process, significantly reducing operational complexity and saving time and effort. The conical structure design reduces the pressure required for extrusion, minimizing tool size and making it suitable for construction in confined spaces. The annular clamping structure between the locking plate and the cable core provides more uniform radial pressure compared to existing circumferential array locking plates, resulting in a more secure fixation and preventing the cable core from loosening and falling off.

[0008] A further improvement of this utility model is that the inner side of the semi-circular slot is provided with an anti-slip texture.

[0009] A further improvement of this utility model is that a semi-cylindrical extrusion surface is provided at the center of the locking piece between its two semi-conical extrusion surfaces. When the two locking pieces are combined, the two semi-cylindrical extrusion surfaces form a cylindrical extrusion surface. A cylindrical cavity that cooperates with the cylindrical extrusion surface is provided on the side of the conical cavity near the center of the locking piece. When the two locking sleeves are closed, the two cylindrical cavities completely enclose the cylindrical extrusion surface, so that the two locking sleeves completely enclose the locking mechanism.

[0010] A further improvement of this utility model is that it also includes an outer sleeve, which is fitted over the outside of the two locking sleeves after the two locking sleeves are closed.

[0011] A further improvement of this utility model is that the two ends of the outer sleeve are respectively fitted onto the outer side of the cable sheath at the joint end of the two cables.

[0012] A further improvement of this utility model is that the diameter of the two locking sleeves and the locking mechanism as a whole corresponds to the diameter of the cable.

[0013] A further improvement of this utility model is that the outer sleeve is made of an elastic material, and the inner diameter of the outer sleeve is smaller than the diameter of the cable.

[0014] A further improvement of this utility model is that the locking sleeve and the locking mechanism are engaged by friction.

[0015] As can be seen from the above technical solutions, the beneficial effects of this utility model are: 1. This connector replaces the traditional threaded connection with a pure extrusion structure. With its simplified operation process of placement, alignment and extrusion, it eliminates the tedious steps of thread alignment. It not only saves time and effort, but also allows for rapid construction in confined spaces due to its low tool size requirements. It effectively avoids problems such as thread wear and stripping, and significantly improves installation efficiency. It is especially suitable for emergency repairs and large-scale construction scenarios.

[0016] 2. This connector adopts a split locking plate and conical extrusion structure. The circular groove and anti-slip texture formed by the symmetrical arrangement of at least two locking plates, combined with the radial contraction force of the conical extrusion surface of the locking sleeve conical cavity, can generate sufficient friction to fix the cable core. In addition, the cooperation between the central cylindrical extrusion surface and the cylindrical cavity of the locking sleeve eliminates the force blind zone, so that the fixing range covers the entire length of the locking plate. Compared with the structure that only relies on the upper end of the locking plate for extrusion, the connection strength is higher and can effectively cope with scenarios such as high load current transmission and axial tension.

[0017] 3. The elastic outer sleeve of this connector is fitted outside the locking sleeve and has an interference fit with the cable sheath. Sealing is achieved through elastic compression and contraction, eliminating the need for multiple sealing rings, resulting in a simpler structure and lower cost. Its elastic material adapts to the thermal expansion and contraction of the cable, providing a stable dynamic seal. It prevents moisture and dust intrusion, buffers vibration, and reduces component wear. Furthermore, the frictional wedge engagement between the locking sleeve and the locking mechanism, along with the overall diameter matching the cable, ensures a smooth outer surface for easy installation and maintenance, extending the connector's service life. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of the structure after the lock sleeve and the locking mechanism are engaged according to a specific embodiment of this utility model.

[0021] Figure 3 This is a structural schematic diagram of the locking mechanism according to a specific embodiment of the present utility model.

[0022] Figure 4 This is a schematic diagram of the structure of the lock plate in a specific embodiment of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the lock sleeve according to a specific embodiment of this utility model.

[0024] In the diagram: 1. Cable sheath; 2. Cable core; 3. Locking plate; 301. Semi-circular groove; 302. Semi-conical extrusion surface; 303. Semi-cylindrical extrusion surface; 4. Locking sleeve; 401. Conical chamber; 402. Cylindrical chamber; 5. Outer sleeve. Detailed Implementation

[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0026] Now refer to Figure 1 — Figure 5 The following is a description of a specific embodiment: The present invention provides a compression-type cable anchoring joint, comprising two locking plates 3. These two locking plates 3 are symmetrically arranged on the outer side of the joint position of two cable cores 2 to form a split-type locking mechanism capable of pressing the cable cores 2. A semi-circular groove 301 is provided on the side of each locking plate 3 closest to the cable core 2. When the two locking plates 3 are combined, the two semi-circular grooves 301 form a circular groove coaxial with the cable core 2. Semi-conical compression surfaces 302 are provided at both ends of each locking plate 3. When the two locking plates 3 are combined, the two semi-conical compression surfaces 302 form a conical compression surface. Locking sleeves 4 are respectively fitted onto the conical compression surfaces at both ends of the locking mechanism. The interior of each locking sleeve 4 has a conical cavity 401 matching the conical compression surface. When the two locking sleeves 4 are closed, they together enclose the locking mechanism.

[0027] Two locking plates 3 are symmetrically arranged on the outer side of the cable core 2. After assembly, the semi-circular groove 301 forms a circular groove that grips the cable core 2. The two semi-conical extrusion surfaces 302 at both ends form a conical extrusion surface. The locking sleeve 4 is fitted onto both ends of the locking mechanism through the internal conical cavity 401 and the conical extrusion surface. When the locking sleeve 4 is squeezed with a special tool, the conical cavity 401 generates a radial contraction force on the conical extrusion surface, forcing the locking plates 3 to tighten towards the center, so that the circular groove tightly engages with the cable core 2, achieving mechanical fixation.

[0028] The split locking mechanism of this connector does not require thread tightening and is installed through a pure extrusion process, which significantly reduces the complexity of operation and saves time and effort. The conical structure design reduces the pressure required for extrusion, requires smaller tools, and is suitable for construction in confined spaces. The annular clamping structure between the locking plate 3 and the cable core 2 provides more uniform radial pressure and more stable fixation compared to the existing circumferential array locking plates, preventing the cable core 2 from loosening and falling off.

[0029] Specifically, refer to Figure 3 , Figure 4 and Figure 5 The locking plate 3 has a semi-cylindrical extrusion surface 303 located between its two semi-conical extrusion surfaces 302 at its center. When the two locking plates 3 are combined, the two semi-cylindrical extrusion surfaces 303 form a cylindrical extrusion surface. The conical chamber 401 has a cylindrical chamber 402 that mates with the cylindrical extrusion surface on the side near the center of the locking plate 3. When the two locking sleeves 4 are closed, the two cylindrical chambers 402 completely enclose the cylindrical extrusion surface, so that the two locking sleeves 4 completely enclose the locking mechanism.

[0030] The semi-cylindrical extrusion surface 303 at the center of the locking plate 3 combines to form a cylindrical extrusion surface, which cooperates with the cylindrical cavity 402 inside the conical cavity 401 of the locking sleeve 4. When the locking sleeve 4 is closed, the cylindrical cavity 402 applies axial pressure to the cylindrical extrusion surface, causing the middle part of the locking plate 3 to fit tightly against the cable core 2, forming a triple fixing structure of conical extrusion at both ends and cylindrical extrusion in the middle.

[0031] This structure, through the cooperation of the cylindrical chamber 402 and the cylindrical extrusion surface, compensates for the potential force blind spot in the middle of the locking plate 3 that may exist in simple conical extrusion, making the extrusion of the cable core 2 by the locking plate 3 more uniform and avoiding local loosening; compared with the structure of the prior art that only relies on the extrusion of the upper end of the locking plate, the fixing range of this design covers the entire length of the locking plate 3, improving the overall connection strength, and is especially suitable for high-load connection scenarios of large-diameter cables.

[0032] Specifically, refer to Figure 1 It also includes an outer sleeve 5, which is fitted over the outside of the two locking sleeves 4 after the two locking sleeves 4 are closed.

[0033] The outer sleeve 5 is located on the outside of the closed locking sleeve 4. A special tool is used to radially compress the outer sleeve 5, causing its inner wall to fit tightly against the outer surface of the locking sleeve 4, thus forming a protective enclosure for the locking mechanism. The restraining effect of the outer sleeve 5 prevents the locking sleeve 4 from shifting due to vibration during long-term use, while also isolating the external environment from the internal locking mechanism.

[0034] This connector isolates the mechanical connection between the locking plate 3 and the locking sleeve 4 from the external environment through the outer sleeve 5, preventing dust and moisture from entering and causing component corrosion, thus extending service life. Compared with the complex structure of existing technologies that achieve sealing through multiple sealing rings, this design achieves protection by extruding a single outer sleeve 5, simplifying the assembly process, reducing costs, and providing higher sealing reliability.

[0035] Specifically, refer to Figure 1 The two ends of the outer sleeve 5 are respectively fitted onto the outer side of the cable sheath 1 at the joint end of the two cables.

[0036] The outer sleeve 5 is fitted over the outer side of the cable sheath 1 at both ends. After compression, the inner wall of the outer sleeve 5 and the cable sheath 1 form an interference fit, creating a sealed interface. This design allows the outer sleeve 5 to not only wrap around the locking sleeve 4 but also directly connect to the cable body, forming a dual protection system where the locking sleeve 4 fixes the cable core 2 and the outer sleeve 5 seals the cable sheath 1.

[0037] This connector effectively prevents moisture from seeping into the connection point along the cable sheath 1 by directly engaging the outer sleeve 5 with the cable sheath 1, thus solving the sealing defect of the limited contact area between the O-ring and the cable outer wall in the prior art. At the same time, the compression of the cable sheath 1 by the outer sleeve 5 can disperse the axial tension of the cable, avoiding the tension from acting directly on the connection between the locking plate 3 and the cable core 2, thereby improving the tensile strength of the overall structure.

[0038] Specifically, refer to Figure 1 The diameter of the two locking sleeves 4, when integrated with the locking mechanism, corresponds to the diameter of the cable.

[0039] The overall diameter of the locking sleeve 4 after closing with the locking mechanism is consistent with the cable diameter, so that the outer sleeve 5 forms a smooth transition outer surface after compression. This design ensures that the outer sleeve 5 can be subjected to uniform force during compression, avoiding local stress concentration caused by diameter difference, and at the same time matching the overall size of the joint with the cable appearance, which facilitates subsequent insulation layer covering or conduit laying.

[0040] This connector eliminates installation obstacles caused by uneven diameter in traditional connectors through the aforementioned diameter matching design, making it particularly suitable for scenarios requiring insertion into narrow pipes or multiple protective layers. Compared to the stepped structure that may exist between the locking sleeve and the cable in existing technologies, the smooth transition of this design reduces frictional resistance during cable laying and improves construction efficiency.

[0041] In one embodiment, reference Figure 4 The inner side of the semi-circular slot 301 is provided with an anti-slip texture.

[0042] When the anti-slip texture, such as serrated or corrugated, on the inner side of the semi-circular groove 301 contacts the surface of the cable core 2, it increases the coefficient of friction and hinders the axial movement of the cable core 2. When the locking piece 3 is squeezed and tightened, the anti-slip texture embeds into the surface of the cable core 2, forming a mechanical engagement and further enhancing the friction.

[0043] This connector effectively solves the problem of slippage when the smooth groove is under cable stress through its anti-slip texture design. Especially in the transmission of high load current, it can prevent the cable core 2 from being displaced due to vibration or tension, thus improving the reliability of the connection. Compared with the friction force generated by the tilt angle of the locking plate in the existing technology, the anti-slip effect of this structure is more direct and causes less damage to the surface of the cable core 2.

[0044] In one embodiment, the outer sleeve 5 is made of an elastic material, and the inner diameter of the outer sleeve 5 is smaller than the diameter of the cable.

[0045] The inner diameter of the outer sleeve 5, made of elastic material such as rubber or elastic plastic, is smaller than the cable diameter. When compressed, the outer sleeve 5 generates radial contraction force due to elastic deformation, tightly fitting the outer surface of the cable sheath 1 and the locking sleeve 4. This interference fit requires no additional seals, achieving dynamic sealing solely through the elasticity of the material, adapting to dimensional changes caused by the thermal expansion and contraction of the cable.

[0046] This connector overcomes the limitations of the existing technology that requires precise installation of the sealing ring by using the self-sealing characteristics of the elastic outer sleeve 5. Even if there is a slight deviation during installation, it can be compensated by elastic deformation to ensure the sealing effect. At the same time, the buffering effect of the elastic material can absorb external vibration, reduce wear between the locking plate 3 and the cable core 2, and extend the service life of the connector. It is especially suitable for vibrating environments such as industrial equipment and rail transportation.

[0047] In one embodiment, the locking sleeve 4 is frictionally engaged with the locking mechanism.

[0048] The inner wall of the locking sleeve 4 and the conical pressing surface of the locking plate 3 are fixed by friction wedge engagement. That is, when pressing, the pressure generated by the conical cavity 401 of the locking sleeve 4 on the locking plate 3 is converted into frictional force, preventing the locking sleeve 4 and the locking plate 3 from rotating relative to each other or displacing axially. This friction connection does not require threads or snaps, and only relies on the positive pressure between the conical surfaces to maintain the tightness.

[0049] Compared to existing threaded connections, friction wedge structures avoid problems such as thread wear and stripping, and can maintain connection strength even after repeated disassembly and assembly. At the same time, the self-locking effect generated by conical friction can prevent the locking sleeve 4 from loosening after compression, making it particularly suitable for scenarios that require frequent maintenance or adjustment, thus improving the reliability of the connection and the convenience of maintenance.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An extruded cable anchoring joint comprising a locking plate (3), characterised in that, The locking plate (3) consists of two pieces, which are symmetrically arranged on the outside of the docking position of the two cable cores (2) to form a split locking mechanism that can press the cable cores (2). A semi-circular slot (301) is provided on the side of the locking plate (3) close to the cable core (2). When the two locking plates (3) are combined, the two semi-circular slots (301) form a circular slot coaxial with the cable core (2). The two ends of the locking plate (3) are respectively provided with a semi-conical extrusion surface (302). When the two locking plates (3) are combined, the two semi-conical extrusion surfaces (302) form a conical extrusion surface. Lock sleeves (4) are respectively fitted on both ends of the locking mechanism. A conical cavity (401) matching the conical extrusion surface is provided inside the lock sleeve (4). When the two lock sleeves (4) are closed, the two lock sleeves (4) together wrap the locking mechanism.

2. An extruded cable anchoring fitting according to claim 1, characterized in that The inner surface of the semi-circular slot (301) is provided with an anti-slip texture.

3. An extruded cable anchoring fitting according to claim 1, characterized in that The center of the locking plate (3) is provided with a semi-cylindrical extrusion surface (303) located between the semi-conical extrusion surfaces (302) at both ends. When the two locking plates (3) are combined, the two semi-cylindrical extrusion surfaces (303) form a cylindrical extrusion surface. The conical cavity (401) is provided with a cylindrical cavity (402) that cooperates with the cylindrical extrusion surface on the side near the center of the locking plate (3). When the two locking sleeves (4) are closed, the two cylindrical cavities (402) completely enclose the cylindrical extrusion surface so that the two locking sleeves (4) completely enclose the locking mechanism.

4. An extruded cable anchoring fitting according to claim 1, characterized in that It also includes an outer sleeve (5), which is fitted over the outside of the two locking sleeves (4) after the two locking sleeves (4) are closed.

5. An extruded cable anchoring fitting according to claim 4, characterised in that The two ends of the outer sleeve (5) are respectively fitted onto the outside of the cable sheath (1) at the joint end of the two cables.

6. An extruded cable anchoring fitting according to claim 5, wherein, The diameter of the two locking sleeves (4) and the locking mechanism as a whole corresponds to the diameter of the cable.

7. An extruded cable anchoring fitting according to claim 6, characterised in that The outer sleeve (5) is made of elastic material, and the inner diameter of the outer sleeve (5) is smaller than the diameter of the cable.

8. An extruded cable anchoring fitting according to claim 1, wherein The locking sleeve (4) engages with the locking mechanism through friction.

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