Self-adaptive size-adjustable optical cable fitting

Abstract

The invention relates to the technical field of line infrastructures, in particular to a self-adaptive size-adjustable optical cable fitting, which comprises a fitting main body, a clamping part and a pressure assembly. Two containing cavities and an installation cavity between the two containing cavities are formed in the fitting body, and a cable sequentially penetrates through the two containing cavities and is bent. The clamping part comprises a first clamp detachably arranged in the containing cavity, and a clamping space is formed by the first clamp and the outer side wall of the mounting cavity. The pressure assembly comprises a driving rod slidably arranged in the mounting cavity and a linkage assembly, one end of the driving rod extends out and makes contact with the cable bending part, and the linkage assembly is arranged between the driving rod and the first clamp and used for driving the clamping part to move towards the clamping space. During use, the optical cable bending and tensioning driving rod slides, the linkage assembly drives the first clamp to move and clamp the optical cable, and self-adaptive adjustment and self-locking are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of line infrastructure, in particular to an optical cable clamp with adaptive adjustable size. BACKGROUND

[0002] In the construction of power communication and optical fiber networks, optical cables often need to be fixed and supported by clamps. Traditional optical cable clamps usually adopt fixed-size clamping structures, and the clamping force and clamping range are often preset, which is difficult to adapt to the installation requirements of optical cables with different diameters or different tension levels. During installation, if the tension of the optical cable is too large, it is easy to cause insufficient clamping force and slip, affecting the reliability of the fixation; if the tension is too small, the optical cable sheath may be damaged due to excessive clamping. In addition, the adjustment of existing clamps often relies on manual experience or external tools, which is complicated and difficult to achieve adaptive adjustment during installation. SUMMARY

[0003] The purpose of the present application is to provide an optical cable clamp with adaptive adjustable size, which can adapt to the size and tension state of the optical cable, realize reliable and convenient installation, and effectively protect the optical cable.

[0004] An optical cable clamp with adaptive adjustable size comprises:

[0005] A clamp body, two accommodating cavities are provided side by side in the length direction of the clamp body, the cable passes through one of the accommodating cavities and then passes through the other accommodating cavity after being bent, and an installation cavity is provided between the two accommodating cavities;

[0006] A clamping part, comprising a first clamp which is detachably arranged in each of the two accommodating cavities, and a clamping space for the optical cable is formed between the first clamp and the outer side wall of the installation cavity;

[0007] A pressure assembly, comprising a driving rod and a linkage assembly, the driving rod is slidingly arranged in the installation cavity in the length direction of the clamp body and one end of the driving rod extends out of the installation cavity, the extending end of the driving rod is used to contact the bent part of the cable, and the linkage assembly is arranged between the driving rod and the first clamp and is used to drive the clamping part to move towards the side close to the clamping space.

[0008] In some embodiments, the linkage assembly comprises a linkage lever, an installation hole is provided between the installation cavity and the accommodating cavity for communication between the two, the linkage lever is rotatably arranged in the installation hole and the rotation direction of the linkage lever is perpendicular to the driving rod, and the two ends of the linkage lever are respectively provided with a driving shaft and a driven shaft which are parallel to the direction of the rotation axis of the linkage lever;

[0009] The driving rod is provided with a first mounting groove, and a sliding groove is formed in the side wall of the first mounting groove, wherein the driving shaft is slidingly arranged in the sliding groove; the linkage lever is rotationally connected with the first clamp through the driven shaft.

[0010] In some embodiments, the linkage lever comprises a first rod body and a second rod body arranged integrally, the driving rotation is arranged at the end of the first rod body, the driven rotation is arranged at the end of the second rod body, the rotation shaft of the linkage lever is located between the first rod body and the second rod body, the length of the first rod body is greater than the length of the second rod body, and the first rod body and the second rod body are arranged at an obtuse angle.

[0011] In some embodiments, a contact wheel for contacting the bending part of the optical cable is rotationally arranged on the extending end of the driving rod, the rotation axis of the contact wheel is perpendicular to the driving rod, and a wire slot matched with the optical cable is formed in the circumferential direction on the curved side wall of the contact wheel.

[0012] In some embodiments, the clamping part further comprises a second clamp arranged between the first clamp and the outer side wall of the accommodating cavity, and the clamping space is formed between the first clamp and the second clamp; wherein the outer side wall of the accommodating cavity is arranged to be inclined from one end to the other end, and the outer wall of the second clamp is arranged as an inclined surface matched with the slope thereof.

[0013] In some embodiments, the fitting body comprises a first body and a second body arranged symmetrically, and the first body and the second body are snap-fitted to form the accommodating cavity and the mounting cavity; the side walls on both sides of the first body and the side walls on both sides of the second body are provided with connecting ears matched with each other.

[0014] In some embodiments, it further comprises a fixed pull rod and two groups of fixed sleeves, the two groups of fixed sleeves are arranged between the connecting ears on both sides of the first body and the connecting ears on both sides of the second body, and the two ends of the fixed pull rod are fixedly connected with the two groups of fixed sleeves.

[0015] In some embodiments, the fixed pull rod is slidingly arranged in the fixed sleeve, and the two ends of the fixed pull rod are provided with fixed bolts.

[0016] In some embodiments, safety shells are arranged on both sides of the fitting body, and the safety shells are provided with through holes for the optical cable and the driving rod to pass through.

[0017] The beneficial effects of the present application are: by setting the pressure assembly with the driving rod and the linkage assembly, the tension generated when the optical cable is bent is ingeniously utilized. When the optical cable is inserted and bent and tightened, the bent part will push the driving rod to slide, and then the movement is converted into driving force to the first clamp through the linkage assembly, so that the clamping part automatically applies clamping force to the optical cable. This process realizes self-adaptive adjustment, and the clamping force is positively correlated with the tensioning degree of the optical cable, which can not only ensure that different diameter optical cables can obtain sufficient fixing force after being tightened to form effective self-locking, but also avoid the problem of too loose or too tight clamping caused by improper initial pre-tightening force. At the same time, the first clamp can be detachably arranged, which is convenient for maintenance and replacement, the overall structure is compact, the installation operation is simple, reliable fixing can be completed without the help of complex tools, the construction efficiency and the adaptability of the fitting to different working conditions are effectively improved, and the service life of the optical cable is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the self-adaptive and size-adjustable optical cable fitting in the present application.

[0019] Figure 2 It is an explosion view of the main body part of the fitting in the present application.

[0020] Figure 3 It is a side view of the main body of the fitting in the present application after being opened.

[0021] Figure 4 It is a structure view of the first main body in the present application.

[0022] Figure 5 It is a partial sectional view of the pressure assembly in the present application.

[0023] Figure 6 It is a structure view of the linkage lever in the present application.

[0024] The drawings show that: 1, the fitting main body; 11, the containing cavity; 12, the installation cavity; 13, the installation hole; 14, the first main body; 15, the second main body; 2, the clamping part; 21, the first clamp; 22, the second clamp; 23, the second installation slot; 3, the pressure assembly; 31, the driving rod; 32, the linkage lever; 321, the first rod body; 322, the second rod body; 323, the driving shaft; 324, the driven shaft; 33, the contact wheel; 331, the wire slot; 34, the first installation slot; 35, the sliding slot; 4, the fixed pull rod; 41, the fixed sleeve; 42, the fixed bolt; 5, the safety shell. DETAILED DESCRIPTION

[0025] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Generally, the components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents the selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0027] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0028] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] In addition, if the terms "horizontal", "vertical", "overhang" and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the construction of power communication and optical fiber networks, optical cables often need to be fixed and supported by hardware. Traditional optical cable hardware usually adopts a fixed-size clamping structure, and the clamping force and clamping range are often preset, which is difficult to adapt to the installation requirements of optical cables with different diameters or different tension levels. During installation, if the tension of the optical cable is too large, it is easy to cause insufficient clamping force and slip, affecting the reliability of the fixation; if the tension is too small, the optical cable sheath may be damaged due to excessive clamping. In addition, the adjustment of existing hardware often relies on manual experience or external tools, which is cumbersome and difficult to achieve self-adaptive adjustment during installation, especially in situations where a certain bending radius is required to utilize the friction force for self-locking, there is a lack of a mechanism that can automatically adjust the clamping force according to the actual bending state and tension of the optical cable. Therefore, there is an urgent need for a new hardware structure that can adapt to the size and tension state of the optical cable, achieve reliable and convenient installation, and effectively protect the optical cable.

[0031] Therefore, the present application provides a self-adaptive and adjustable size optical cable hardware, referring to Figure 1 and Figure 2 , including a hardware main body 1 as the structural basis, a clamping part 2 responsible for directly restraining the optical cable, and a pressure assembly 3 for realizing the self-adaptive adjustment function. The hardware main body 1 is the carrier of the entire device, usually made of high-strength aluminum alloy or engineering plastic through casting or machining to ensure sufficient mechanical strength and corrosion resistance. Inside the hardware main body 1, two independent rectangular cross-section accommodating cavities 11 are opened along the length direction of the hardware main body 1, and the two accommodating cavities 11 are arranged side by side along the width direction of the hardware main body 1 with parallel axes. In the actual installation process, the cable needs to pass through the two accommodating cavities 11 in turn.

[0032] The specific operation is: the cable first passes into the entrance of the first accommodating cavity 11 located at one end of the hardware main body 1, after passing through the cavity, the cable is guided to bend towards the middle of the hardware main body 1, forming an arc segment or U-shaped bending part with a specific curvature radius, and then the bending part enters and passes through the second accommodating cavity 11 adjacent to the first accommodating cavity 11, and finally passes out from the outlet of the second accommodating cavity 11 located at the other end of the hardware main body 1. This specific cable path design makes the optical cable form a controlled and fixed shape bending inside the hardware main body 1. In structure, the two accommodating cavities 11 are not solidly separated, and a mounting cavity 12 is specially provided on the hardware main body 1 adjacent to the two accommodating cavities 11, which is located in the middle region of the two accommodating cavities 11 in space, and its function is clearly distinguished from the accommodating cavities 11, mainly used for accommodating and installing the key moving parts of the pressure assembly 3, providing the required space for the sliding of the driving rod 31 and the action of the linkage assembly. The size of the mounting cavity 12 needs to be accurately calculated to ensure that the internal components have sufficient movement stroke and do not interfere with the cavity wall.

[0033] Referring to Figures 1 to 6The clamping part 2 is directly applied to the optical cable and realizes the final fixing and locking function. The clamping part 2 mainly comprises a first clamp 21 which is detachably arranged in each accommodating cavity 11. The first clamp 21 is usually made of high-strength metal. One side of the first clamp 21 is shaped to match the inner profile of the accommodating cavity 11, and the other side is processed into a curved surface which is matched with the optical cable. The first clamp 21 is allowed to move in a certain range along the direction perpendicular to the axis of the optical cable (i.e. the direction close to or away from the optical cable). The first clamp 21 arranged in each accommodating cavity 11 is arranged on the side close to the mounting cavity 12. The moving surface of the first clamp 21 and the stationary surface of the side wall of the accommodating cavity 11 away from the mounting cavity 12 together form a gap which is the clamping space for actually accommodating and clamping the optical cable. When the optical cable passes through the accommodating cavity 11, the cable body passes through the corresponding clamping space.

[0034] A gasket for contacting the optical cable is arranged on the side wall of the first clamp 21. The first clamp 21 is detachably arranged, so that different sizes or different friction coefficients of the clamp gasket can be replaced according to different diameter specifications of the optical cable, and daily maintenance and replacement of damaged parts are facilitated. The working surface of the first clamp 21 in contact with the optical cable or the gasket is often designed with longitudinal tooth pattern, friction concave point or embedded high-friction coefficient material (such as rubber, polyurethane), so as to increase the static friction of clamping and prevent the optical cable from slipping after being stressed.

[0035] The pressure assembly 3 is a device for converting the tension of the optical cable into clamping force. The pressure assembly 3 mainly comprises a driving rod 31 and a linkage assembly. The driving rod 31 is a main force-receiving and force-transmitting member, usually a high-strength steel square rod, which is slidably arranged in the installation cavity 12 along the length direction of the fitting body 1 (i.e. the general direction of the optical cable). The driving rod 31 is cooperated with the wall of the installation cavity 12 through a linear bearing, a precision bushing or a guide groove made of low-friction coefficient material to ensure smooth sliding and no radial shaking. One end of the driving rod 31 extends out of the installation cavity 12, and this extending end is processed into a specific shape, which is designed to directly contact and bear the pressure of the inner side of the bending part of the optical cable formed during the passing process, i.e. the inner side of the bending arc. The linkage assembly is a mechanical transmission and motion conversion mechanism, which is arranged between the driving rod 31 and the two first clamps 21 mentioned above to form a complete motion chain. The linkage assembly is used to reliably convert the linear sliding motion of the driving rod 31 along the length direction of the fitting body 1 into the driving action on the two first clamps 21, so as to drive the two clamping parts 2 to move synchronously towards the center of the respective clamping space, i.e. to compress the optical cable. The working principle is as follows: when the external construction tension acts on the optical cable, the bending part of the optical cable changes in curvature and exerts a pressure on the extending end of the driving rod 31, which is directed to the inside of the installation cavity 12, forcing the driving rod 31 to slide into the installation cavity 12. This sliding action is transmitted and converted through the linkage assembly and finally converted into the radial clamping force of the two first clamps 21 on the optical cable. The key is that the size of the clamping force is positively related to the tension of the optical cable, realizing the self-adaptive adjustment of the clamping force. The tighter the optical cable is pulled, the greater the clamping force is, thereby forming a reliable self-locking to avoid the optical cable from slipping outwards.

[0036] In some specific embodiments, with reference to Figures 1 to 6 A preferred and efficient and reliable implementation of the linkage assembly includes a linkage lever 32. In order to accommodate and install the linkage lever 32, a mounting hole 13 for connecting the installation cavity 12 and the accommodating cavity 11 is formed in the partition wall (or inner wall) between the installation cavity 12 and each accommodating cavity 11. The linkage lever 32 is rotatably supported on the inner wall of the mounting hole 13 through a rotating shaft. The rotating axis of the linkage lever 32 is arranged along the thickness direction of the fitting body 1 to be perpendicular to the sliding direction of the driving rod 31 to define the motion plane thereof. The two ends of the linkage lever 32 are respectively provided with a driving shaft 323 and a driven shaft 324 in the direction perpendicular to the rotating axis of the linkage lever 32, and the axes of the two shafts are parallel to the rotating axis of the linkage lever 32. In order to effectively connect with the driving end of the linkage lever 32, a first mounting slot 34 is formed in the rod body of the driving rod 31 corresponding to the position of each linkage lever 32.

[0037] The side wall of the first mounting slot 34 is further processed with a sliding slot 35 extending along the sliding direction of the driving rod 31. The direction of the sliding slot 35 can be vertical direction parallel to the width direction of the fitting body 1, or can be inclined direction with a certain angle. The end of the driving pivot 323 of the linkage lever 32 is slidingly embedded in the sliding slot 35, forming a sliding pair connection. Meanwhile, the driven pivot 324 of the linkage lever 32 is connected with the connecting seat or the groove on the back of the first clamp 21 in the accommodating cavity 11, forming a rotating pair connection. In the present application, the back of the first clamp 21 is provided with a second mounting slot 23, and the driven pivot 324 is rotatably arranged on the two side walls of the second mounting slot 23. The end of the linkage lever 32 close to the driving rod 31 is obliquely arranged to the side of the extending end of the driving rod 31. When the driving rod 31 slides under the pressure of the optical cable, the driving rod 31 drives the linkage lever 32 to swing inward. The pushing force will force the linkage lever 32 to rotate around its own fulcrum (i.e. the pivot in the mounting hole 13). The rotation of the linkage lever 32 will push the first clamp 21 connected with the driven pivot 324 on the other end of the linkage lever 32 to move to the side of the optical cable. At this time, the force of the first clamp 21 on the optical cable is divided into two parts, one part is the clamping force on the optical cable, and the other part is the friction force driving the optical cable to move to the side of the insertion direction. Thus, the optical cable is prevented from loosening and sliding out from two directions.

[0038] Further, the linkage lever 32 can be designed to include a first rod 321 and a second rod 322 integrally forged or machined. The driving shaft 323 is installed at the end of the first rod 321 through a bearing or a shaft sleeve, and the driven shaft 324 is also installed at the end of the second rod 322 in a similar manner. The rotation axis of the linkage lever 32, i.e. its physical fulcrum axis, is located at the connection between the first rod 321 and the second rod 322. In order to improve the mechanical efficiency, so that when the driving rod 31 is subjected to a small displacement under the pressure of the optical cable, it can be converted into a larger radial displacement of the first clamp 21 or provide a larger clamping force, the length of the first rod 321 is usually designed to be significantly greater than the length of the second rod 322, thereby forming a force-saving lever. In addition, the first rod 321 and the second rod 322 are not in a straight line or a standard right angle, but are arranged at an obtuse angle greater than 90 degrees and less than 180 degrees. This obtuse angle structure makes the linkage lever 32 at a more favorable transmission starting angle when it is in the initial installation state and the optical cable has not been tensioned. When the driving rod 31 is forced to start sliding into the installation cavity 12, the obtuse angle structure makes the angle between the first rod 321 and the sliding direction of the driving rod 31, and the angle between the second rod 322 and the movement direction of the first clamp 21 change more gently, which helps to more smoothly and effectively convert the axial thrust of the driving rod 31 into the rotational motion of the linkage lever 32, and through the shorter second rod 322, the amplified force is efficiently transmitted to the first clamp 21 in a nearly vertical direction, achieving a labor-saving and efficient clamping action, while reducing the risk of dead points and jamming of the mechanism.

[0039] In another embodiment, the transmission mode of the pressure assembly 3 can be changed. The linkage assembly can not be limited to a lever, but can use a rack and pinion mechanism. Specifically, a rack is machined on the side of the driving rod 31. In the partition wall between each accommodation cavity 11 and the installation cavity 12, a pinion shaft that can engage with the rack is installed, one end of the pinion shaft engages with the rack, and the other end extends into the accommodation cavity 11 and converts the rotational motion into linear motion perpendicular to the optical cable axis direction through a set of bevel gears or another set of gear pairs, thereby driving the first clamp 21. This gear transmission mode can achieve more accurate displacement conversion and higher transmission efficiency, and the force amplification ratio can be flexibly adjusted by selecting different gear tooth ratios to adapt to the needs of optical cables with different maximum tensions. At the same time, the gear mechanism has a long service life and high reliability in a well-sealed environment.

[0040] To minimize the friction between the cable bending part and the end of the driving rod 31, protect the cable sheath from cutting or abrasion, and ensure the efficiency of force transmission, a contact wheel 33 mechanism can be integrated on the extended end of the driving rod 31. The contact wheel 33 is usually made of hard engineering plastics (such as nylon, POM) or metal with a hard coating on the surface, and is rotatably installed on the specially designed fork-shaped or U-shaped bracket at the end of the driving rod 31 through a sturdy axle. The rotation axis of the contact wheel 33 is perpendicular to the sliding direction of the driving rod 31 and the length direction of the fitting body 1. On the cylindrical curved side wall of the contact wheel 33, a V-shaped, U-shaped or circular arc-shaped groove 331 is precisely machined or molded along the circumferential direction, which is compatible with the shape of the commonly used cable outer diameter. When the cable bending part is pressed on the contact wheel 33, the cable body will naturally fall into and fit into the groove 331. The groove 331 plays a good guiding, limiting and dispersing contact pressure on the cable. When the position needs to be adjusted during the initial installation of the cable, or when there is a slight displacement of the cable body due to temperature changes, wind vibration, etc. during subsequent operation, the contact wheel 33 can roll relative to the cable, thereby converting potential sliding friction into rolling friction, greatly reducing frictional resistance, and further maximizing the conversion of cable tension to the driving rod 31 when the cable is loosened outward. At the same time, it reduces the scratching, fatigue or damage of the cable sheath caused by direct sliding friction with rigid components.

[0041] Considering that the first clamp 21 may need a reset force to loosen the cable for adjustment during the initial installation of the cable or when the tension is completely removed, a reset spring can be added to the linkage assembly or the first clamp 21. For example, a pre-compressed coil spring is installed between each first clamp 21 and the wall of the accommodating cavity 11, and the spring force direction makes the first clamp 21 normally in a slightly loose position. When the driving rod 31 is pressed to push the linkage assembly to make the first clamp 21 clamped, the spring force needs to be overcome. Once the cable tension disappears, the spring force will push the first clamp 21 back to position and loosen the clamping of the cable. This design makes it more convenient to install and remove the cable, and also provides a clear "zero position" reference for the mechanism.

[0042] In some embodiments, referring to Figures 1 to 6 To further enhance the reliability, uniformity and self-locking ability of clamping, the structure of the clamping part 2 can also be provided with a second clamp 22 based on the first clamp 21. The second clamp 22 is arranged between the first clamp 21 and the original outer side wall of the accommodating cavity 11. At this time, the clamping space is formed by the outer side working surface of the first clamp 21 facing the cable and the inner side working surface of the second clamp 22. This design increases one clamping interface, which can make the clamping force more evenly distributed on the larger area of the cable circumference, reducing the local pressure.

[0043] The original outer side wall of the accommodating cavity 11 is designed as a slanted plane tapering from one end to the other, i.e. a slope, which tapers inward from the side close to the cable bending section to the side where the cable enters, and accordingly, the outer wall of the second clamp 22, i.e. the surface that matches the slanted outer side wall of the accommodating cavity 11, is also precisely machined or cast into a matching slope that is completely consistent with the slope of the slanted outer side wall, along which the second clamp 22 can slide in the accommodating cavity 11. When the cable is fixed after entering, the second clamp 22 is inserted to the side away from the extending end of the driving rod 31, and under the action of the slope, the second clamp 22 moves to the side close to the first clamp 21, clamping the cable.

[0044] In consideration of the convenience of installation, manufacturing and maintenance, as well as the cost of mass production, the fitting body 1 can adopt a split combined structure. Specifically, the fitting body 1 includes two parts divided along the symmetry plane: a first body 14 and a second body 15. The first body 14 and the second body 15 are usually firmly buckled together by a series of high-strength bolts arranged along the periphery or precisely buckled and locked. When the first body 14 and the second body 15 are accurately positioned and combined, the pre-set cavity half-slots in their respective interiors are jointly pieced together to form the aforementioned two complete accommodating cavities 11 and one complete installation cavity 12 in the middle. This split design makes it easier to realize the complex internal cavity structure and installation hole 13 through casting or machining, and also facilitates the placement of internal components such as the driving rod 31 and the linkage lever 32 during assembly. In order to achieve accurate positioning and reliable connection of the two bodies when buckled, connection ears with through holes are provided on the outer edges of the side walls on both sides of the first body 14 and the second body 15. These connection ears are aligned in pairs after the bodies are buckled, facilitating the passage and locking of fasteners such as bolts.

[0045] The cable fitting also includes a fixed pull rod 4 for connecting with external mounting points and two sets of fixed sleeves 41. The two sets of fixed sleeves 41 are usually thick-walled metal sleeves or forged parts, which are respectively installed between the connection ears on both sides of the first body 14 and the connection ears on both sides of the second body 15. Specifically, each set of fixed sleeves 41 spans across a pair of aligned connection ears of the first body 14 and the second body 15, the holes at both ends of the fixed sleeves 41 are aligned with the through holes on the connection ears, and the fixed sleeves 41 are fixed with the connection ears through short shafts or bolts. The fixed pull rod 4 is a U-shaped metal rod, the two ends of which sequentially pass through the main through holes reserved on the two sets of fixed sleeves 41 and are fixedly connected with the fixed sleeves 41.

[0046] Further, with reference to Figure 1In order to make the fixed pull rod 4 can be adjusted according to different installation conditions, such as different installation positions and the required tension length of the optical cable, the connection mode of the fixed pull rod 4 and the fixed sleeve 41 can be designed to be adjustable. The fixed pull rod 4 can be designed to be slidably arranged in the inner hole of the fixed sleeve 41 within a certain range. Threaded sections are processed at both ends of the fixed pull rod 4, and high-strength fixed nuts (a form of fixed bolts 42) and anti-loose washers are matched. During installation, the fixed pull rod 4 is first inserted through the two groups of fixed sleeves 41, and then the nuts at both ends are preliminarily screwed. After the first body 14 and the second body 15 are buckled through the connecting bolts thereof, the nuts at both ends of the fixed pull rod 4 are simultaneously tightened by using a wrench, so that the extension length of the fixed pull rod 4 is adjusted.

[0047] Finally, for the purpose of safety protection, dust prevention, moisture prevention, insect prevention, and prevention of accidental collision of external objects with internal moving parts, a streamlined safety shell 5 can be installed on both sides of the fitting body 1. The safety shell 5 is usually punched from a metal plate with excellent weather resistance or injection molded from high-strength engineering plastic, and is fixed to the outer contour of the fitting body 1 at both ends by screws or buckles. The safety shell 5 wraps the ends of the fitting body 1 and forms a relatively closed space. The safety shell 5 is provided with precisely positioned perforations, including main line perforations for the passage of incoming and outgoing optical cables, and movable perforations for the movement of the extension end of the drive rod 31. The safety shell 5 serves to protect the complex moving parts and clamping areas inside the fitting, preventing external foreign objects (such as branches, sand, ice and snow) from entering and affecting the operation of the mechanism or accelerating wear. At the same time, it can also prevent on-site personnel or animals from accidentally contacting the moving parts, causing injury or equipment failure, greatly improving the long-term operation reliability, safety and maintenance-free nature of the entire device in complex and harsh environments such as outdoor overhead lines, towers and tunnels.

[0048] For applications that require monitoring of optical cable tension or fitting working status, a micro sensor can be integrated inside the fitting. For example, a strain gauge is attached to the drive rod 31 to measure the force deformation and indirectly reflect the optical cable tension; or a micro displacement sensor is provided on the movement path of the first clamp 21 to monitor the clamping displacement. The sensor signal is transmitted out through the embedded wireless transmission module (such as LoRa, NB-IoT) or the micro wire laid along the optical cable, realizing remote online monitoring. This provides data support for preventive maintenance of smart grids and critical lines.

[0049] This invention cleverly utilizes the tension generated when the optical cable bends by setting up a pressure assembly 3 with a drive rod 31 and a linkage component. When the optical cable is inserted and bent and tightened, its bent portion pushes the drive rod 31 to slide, and then the linkage component converts the motion into a driving force on the first clamp 21, causing the clamping part 2 to automatically apply a clamping force to the optical cable. This process achieves adaptive adjustment, and the clamping force is positively correlated with the tension of the optical cable. This ensures that optical cables of different diameters receive sufficient fixing force after tightening, forming an effective self-locking, while avoiding problems of excessively loose or tight clamping caused by improper initial pre-tightening force settings. At the same time, the first clamp 21 is detachable, facilitating maintenance and replacement. The overall structure is compact, and the installation and operation are simple. Reliable fixing can be achieved without the need for complex tools, effectively improving construction efficiency and the adaptability of the hardware to different working conditions, and extending the service life of the optical cable.

[0050] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

Claims

1. An adaptively size-adjustable cable fitting, characterized by, The utility model relates to a cable clamp, which comprises: a fitting body (1) having two accommodating cavities (11) arranged side by side along the length direction of the fitting body (1), a cable passing through one of the accommodating cavities (11) and then passing through the other accommodating cavity (11) after being bent, and an installation cavity (12) arranged between the two accommodating cavities (11); a clamping part (2) comprising a first clamp (21) arranged in each of the two accommodating cavities (11) respectively, the first clamp (21) and the outer side wall of the installation cavity (12) forming a clamping space for the cable to pass through; a pressure assembly (3) comprising a driving rod (31) and a linkage assembly, the driving rod (31) being arranged in the installation cavity (12) along the length direction of the fitting body (1) and extending out of the installation cavity (12) at one end, the extending end of the driving rod (31) being used to contact the bent part of the cable, and the linkage assembly being arranged between the driving rod (31) and the first clamp (21) and used to drive the clamping part (2) to move towards the side of the clamping space.

2. The optical cable hardware of claim 1, wherein: The linkage assembly comprises a linkage lever (32), an installation hole (13) being arranged between the installation cavity (12) and the accommodating cavities (11) and used to communicate the installation cavity (12) and the accommodating cavities (11), the linkage lever (32) being rotatably arranged in the installation hole (13) and having a rotation direction perpendicular to the driving rod (31), and the two ends of the linkage lever (32) being respectively provided with a driving pivot (323) and a driven pivot (324) parallel to the direction of the rotation axis of the linkage lever (32). A first installation groove (34) is arranged on the driving rod (31), a sliding groove (35) is arranged on the side wall of the first installation groove (34), and the driving pivot (323) is slidably arranged in the sliding groove (35); and the linkage lever (32) is rotatably connected to the first clamp (21) through the driven pivot (324).

3. The optical cable hardware of claim 2, wherein: The linkage lever (32) comprises a first lever body (321) and a second lever body (322) arranged integrally, the driving pivot (323) is arranged at the end of the first lever body (321), the driven pivot (324) is arranged at the end of the second lever body (322), the rotation axis of the linkage lever (32) is located between the first lever body (321) and the second lever body (322), the length of the first lever body (321) is greater than the length of the second lever body (322), and the first lever body (321) and the second lever body (322) are arranged at an obtuse angle.

4. The optical cable hardware of claim 1, wherein: A contact wheel (33) used to contact the bent part of the cable is rotatably arranged on the extending end of the driving rod (31), the rotation axis of the contact wheel (33) is perpendicular to the driving rod (31), and a wire groove (331) adapted to the cable is arranged on the curved side wall of the contact wheel (33) in the circumferential direction.

5. The optical cable hardware of claim 1, wherein: The clamping part (2) further comprises a second clamp (22) arranged between the first clamp (21) and the outer side wall of the accommodating cavity (11), and the first clamp (21) and the second clamp (22) form the clamping space; wherein the outer side wall of the accommodating cavity (11) is arranged obliquely from one end to the other end, and the outer wall of the second clamp (22) is arranged as an inclined surface matching the slope thereof.

6. The optical cable hardware of claim 1, wherein: The fitting body (1) comprises a first body (14) and a second body (15) arranged symmetrically, and the first body (14) and the second body (15) are buckled to form the accommodating cavity (11) and the mounting cavity (12); the side walls on both sides of the first body (14) and the side walls on both sides of the second body (15) are provided with connecting ears matching each other.

7. The optical cable hardware of claim 6, wherein: Further comprising a fixed pull rod (4) and two groups of fixed sleeves (41), the two groups of fixed sleeves (41) are arranged between the connecting ears on both sides of the first body (14) and the connecting ears on both sides of the second body (15), and the two ends of the fixed pull rod (4) are fixedly connected with the two groups of fixed sleeves (41).

8. The optical cable hardware of claim 7, wherein: The fixed pull rod (4) is slidably arranged in the fixed sleeve (41), and the two ends of the fixed pull rod (4) are provided with fixed bolts (42).

9. The optical cable hardware of claim 1, wherein: The two sides of the fitting body (1) are provided with safety shells (5), and the safety shells (5) are provided with perforations for the optical cable and the driving rod (31) to pass through.

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