Optical cable strain clamp

Abstract

The invention provides an optical cable strain clamp, and relates to the technical field of communication equipment.The cable clamp comprises a shell body and at least two oppositely-arranged inner wedge-shaped clamping blocks, a through channel is formed in the shell body, and an axial notch is formed in the side wall of the shell body; the inner wedge-shaped clamping block is slidably arranged in the shell main body, the outer surface of the inner wedge-shaped clamping block and the inner wall of the shell main body form a slope sliding pair, and the wire clamp further comprises an anchoring connection unit and tail end locking structures symmetrically arranged at the tail end of the shell main body; during installation, an optical cable is pressed between the inner wedge-shaped clamping blocks from the axial notches, and the inner wedge-shaped clamping blocks are pushed to move forwards to realize primary clamping; when the optical cable bears tensile force, the inner wedge-shaped clamping block slides along the inclined plane and locks the optical cable in the radial direction. And meanwhile, the pulling force of the anchoring connecting unit acts on the tail end locking structure, so that the tail end locking structure clamps the tail part of the inner wedge-shaped clamping block, and the holding force is further enhanced. The device has the advantages of lateral cable entry, reliable self-locking, strong holding force, convenience in installation and the like, and is suitable for tension anchoring occasions of communication optical cables.

Description

Technical Field

[0001] This invention relates to the field of communication equipment technology, and in particular to an optical cable tension clamp. Background Technology

[0002] Optical fiber cable is an important communication medium used to transmit optical signals. It is typically composed of optical fibers, reinforcing members, and a sheath. It has advantages such as large transmission capacity, strong anti-interference ability, and long transmission distance, and is widely used in communications, power, transportation, and other fields. In actual engineering, optical fiber cables usually need to be erected on supporting structures (such as poles, towers, and supports) and kept fixed under a certain tension to ensure their stability and transmission performance.

[0003] Tension clamps are key hardware used to anchor and tension optical cables to supporting structures. Their function is to bear tension at the ends of the optical cable terminal or tension section and transfer the load to the supporting structure. Existing optical cable tension clamps mostly employ a wedge clamping principle, achieving self-locking through the cooperation of inner and outer wedges. However, traditional structures often suffer from problems such as inconvenient installation, insufficient gripping force, and easy damage to the optical cable sheath. For example, some clamps need to be inserted from the end of the optical cable, making installation difficult in confined spaces or on existing optical cables; others rely on bolt fastening, which is prone to loosening due to vibration or long-term load, affecting anchoring reliability. Summary of the Invention

[0004] The purpose of this invention is to provide an optical cable tension clamp to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An optical cable tension clamp includes a housing body and at least two opposing inner wedge-shaped clamping blocks. The housing body has an axially oriented through-channel for accommodating the optical cable. An axial notch, co-located and communicating with the housing body, is formed on the side wall of the housing body. The inner wedge-shaped clamping blocks are slidably disposed inside the housing body and coaxially configured with the through-channel. One end of each inner wedge-shaped clamping block protrudes from the tail end of the housing body, and the inner surface of each inner wedge-shaped clamping block forms a clamping surface for contact and gripping. The clamp also includes an anchoring connection unit and a tail-end locking structure. Two tail-end locking structures are symmetrically arranged on the tail-end side wall of the housing body. One end of the anchoring connection unit connects to the two tail-end locking structures, and the other end connects to a support structure.

[0007] The outer surface of the inner wedge-shaped clamping block and the inner wall of the outer shell body form a mutually cooperating inclined sliding pair. When the optical cable is subjected to axial tension, the tension drives the inner wedge-shaped clamping block to slide along the inclined surface and lock the optical cable. When the anchoring connection unit is subjected to tension, the end of the anchoring connection unit acts on the tail locking structure, and the tail locking structure clamps the tail of the inner wedge-shaped clamping block from both sides.

[0008] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In one alternative: the anchoring connection unit includes an anchor seat and a connecting rope. The anchor seat is located in the middle of the connecting rope and is used to connect to the support structure. Both ends of the connecting rope are provided with hooks, and the hooks are detachably connected to the tail locking structure.

[0010] In one alternative: the tail-end locking structure includes a side connecting bracket and a side pressing unit. The side connecting bracket has an axially open cavity inside. An axially movable cylinder is provided inside the cavity. The arc apex of the movable cylinder and the upper surface of the cavity both have axially open installation notches. The side pressing unit is located at the tail of the outer shell body, with one end extending to the end face of the movable cylinder and the other end facing the outer wall of the tail of the inner wedge-shaped clamping block.

[0011] In one alternative: the axial length of the movable cylinder is greater than the axial length of the side connecting bracket, and both ends of the movable cylinder are provided with blocking rings with a diameter greater than the diameter of the through cavity; a hidden cavity is provided at one end of the through cavity with an inner diameter greater than the outer diameter of the blocking ring and the outer diameter of the hanging head.

[0012] In one alternative embodiment: the side pressure unit includes a side top rotating shaft, a force-bearing part, and a side pressure block. The side top rotating shaft is rotatably mounted on the end face of the outer shell body via a bearing seat. One end of the force-bearing part is fixedly connected to the side wall of the side top rotating shaft, and the other end extends to and contacts the end face of the blocking ring. The outer wall of the side top rotating shaft is also provided with a side top rod pointing inward to the wedge-shaped clamping block, and the side pressure block is fixed to the end of the side top rod.

[0013] In one alternative: the clamping surface is an arc surface with abrasion-enhancing texture. When the two inner wedge-shaped clamping blocks clamp the optical cable, the two clamping surfaces cooperate with each other to form a spiral pattern.

[0014] In one alternative: the tops of the two inner wedge-shaped clamps are fixedly connected to a front pressure slider, and the front pressure slider is close to the end of the inner wedge-shaped clamp away from the anchoring connection unit. The front pressure slider is connected to the upper surface of the outer shell body and can slide axially.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects:

[0016] In this invention, the outer shell has an axial notch on its side wall, and the inner wedge-shaped clamp maintains a relative gap in the initial state, allowing the optical cable to be directly pressed in from the side without needing to be threaded through the end. This is particularly suitable for situations where space is limited or optical cables have already been laid, significantly improving construction efficiency. The inner wedge-shaped clamp engages with the inner wall of the outer shell via a sloping sliding pair. When the optical cable is under tension, the tension drives the inner wedge-shaped clamp to move forward along the sloping face and tighten radially, achieving automatic locking. The gripping force increases with the increase of tension, ensuring high anchoring safety. Through the linkage between the anchoring connection unit and the tail locking structure, when subjected to tension, the tail locking structure simultaneously clamps the tail of the inner wedge-shaped clamp from both sides, further increasing the radial pressure of the clamping surface on the optical cable and effectively preventing slippage. This is especially suitable for harsh working conditions such as high tension and long-term vibration. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the optical cable tension clamp in this invention.

[0019] Figure 2 This is a schematic diagram of the outer shell structure in this invention.

[0020] Figure 3 This is a schematic diagram of the inner wedge-shaped clamping block structure in this invention.

[0021] Figure 4 This is a schematic diagram of the anchoring connection unit structure in this invention.

[0022] Figure 5 This is a schematic diagram of the tail-end locking structure in this invention.

[0023] Figure 6 This is a schematic diagram of the side connection bracket structure in this invention.

[0024] Reference numerals in the attached drawings: outer shell 100, through channel 110, axial notch 120, inner wedge-shaped clamping block 200, front pressure slider 210, clamping surface 220, grinding texture 230, anchoring connection unit 300, anchoring seat 310, connecting rope 320, hanging head 330, optical cable 400, side connection bracket 500, through cavity 510, hidden cavity 520, installation notch 530, movable cylinder 540, blocking ring 550, side pressure unit 600, side top rotating shaft 610, force-bearing part 620, side top rod 630, side pressure block 640. Detailed Implementation

[0025] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0026] The left, right, up, and down positions of the various components shown in the attached diagram are just one arrangement method; the specific positions should be set according to specific needs.

[0027] In one embodiment, such as Figures 1-4 As shown, a fiber optic cable tension clamp is used to anchor and tension an optical cable 400 onto a support structure. It includes a housing body 100 and at least two opposing inner wedge-shaped clamping blocks 200. The housing body 100 has an axially oriented through-channel 110 for accommodating the optical cable 400. An axial notch 120, co-located and communicating with the housing body 100, is formed on the side wall of the housing body 100. The inner wedge-shaped clamping blocks 200 are slidably disposed inside the housing body 100 and coaxially configured with the through-channel 110. One end of each inner wedge-shaped clamping block 200 protrudes from the tail of the housing body 100, and the inner surface of the inner wedge-shaped clamping block 200 forms a clamping surface 220 for contact and gripping. The clamp also includes an anchoring connection unit 300 and a tail-end locking structure. Two tail-end locking structures are symmetrically arranged on the tail-end side wall of the housing body 100. One end of the anchoring connection unit 300 connects to the two tail-end locking structures, and the other end connects to the support structure.

[0028] The outer surface of the inner wedge-shaped clamp 200 and the inner wall of the outer shell body 100 form a mutually cooperating inclined sliding pair. When the optical cable 400 is subjected to axial tension, the tension drives the inner wedge-shaped clamp 200 to slide along the inclined surface and lock the optical cable 400. When the anchoring connection unit 300 is subjected to tension, the end of the anchoring connection unit 300 acts on the tail locking structure, and the tail locking structure clamps the tail of the inner wedge-shaped clamp 200 from both sides.

[0029] In this embodiment of the invention, during installation, both inner wedge-shaped clamps 200 are located at the tail end of the outer shell body 100 and have a relative gap. The optical cable 400 can be pressed into the two inner wedge-shaped clamps 200 through the axial notch 120 and the relative gap between the two inner wedge-shaped clamps 200. The inner wedge-shaped clamps 200 are pushed towards the front end of the through channel 110, and the inner wedge-shaped clamps 200 slide along the inclined surface. The two inner wedge-shaped clamps 200 approach each other and gradually clamp onto the outer wall of the optical cable 400. One end of the anchoring connection unit 300 is fixed to the support structure, and an axial tensile force is generated between the anchoring connection unit 300 and the optical cable 400. The outer wall of the optical cable 400 and the two inner wedge-shaped clamps... The inner wall of the 200 contacts and generates friction. When the optical cable 400 is subjected to axial tension, the tension drives the inner wedge-shaped clamp 200 to slide along the inclined plane to lock the optical cable 400, thereby forming a self-locking mechanism. At the same time, the axial tension borne by the anchoring connection unit 300 acts on the two tail-end locking structures. The two tail-end locking structures move synchronously and clamp the tails of the two inner wedge-shaped clamps 200, thereby increasing the gripping force of the clamping surface 220 on the optical cable 400. The support structure is an existing technology such as an angle tower or a splicing tower. The outer shell body 100 is made of high-strength composite material, which is carbon fiber reinforced composite material or glass fiber reinforced composite material.

[0030] In one embodiment, such as Figures 1-4 As shown, the anchoring connection unit 300 includes an anchoring seat 310 and a connecting rope 320. The anchoring seat 310 is located in the middle of the connecting rope 320 and is used to connect to the support structure. Both ends of the connecting rope 320 are provided with hooks 330, which are detachably connected to the tail-end locking structure. In this embodiment, the connection between the hooks 330 and the tail-end locking structure is detachable. Therefore, during installation, the hooks 330 and the tail-end locking structure can be separated. The connecting rope 320 is first wound around the support structure, and then the hooks 330 are connected to the tail-end locking structure, improving installation convenience. The connecting rope 320 is flexible and adaptable to different support structures. The connecting rope 320 is made of high-carbon steel or alloy steel, with multiple strands of steel wire twisted into a rope. Through reasonable load distribution, it achieves high overall tensile strength, can withstand heavy loads and impact loads, is not easily broken, and has high wear resistance.

[0031] In one embodiment, such as Figures 1-6As shown, the tail-end locking structure includes a side connecting bracket 500 and a side pressing unit 600. The side connecting bracket 500 has an axially oriented cavity 510 inside, and an axially movable cylinder 540 is disposed inside the cavity 510. The apex of the movable cylinder 540 and the upper surface of the cavity 510 both have axially oriented mounting notches 530. The side pressing unit 600 is located at the tail of the outer shell body 100, with one end extending to the end face of the movable cylinder 540 and the other end facing the outer wall of the tail of the inner wedge-shaped clamp 200. In this embodiment of the invention, the connecting rope 320 can be installed from the... The notch 530 is pressed into the movable cylinder 540. The hanger 330 is located at one end of the cavity 510, and its diameter is larger than the inner diameter of the cavity 510. When the connecting rope 320 is subjected to tension, the hanger 330 contacts one end of the movable cylinder 540 and applies an axial moving force to it. The moving movable cylinder 540 acts on one end of the side pressure unit 600, causing it to move. The other end of the side pressure unit 600 abuts against the side wall of the inner wedge-shaped clamp 200 and applies a radial force to it. As a result, the two inner wedge-shaped clamps 200 move closer to each other and increase the clamping force on the optical cable 400.

[0032] In one embodiment, such as Figures 1-6 As shown, the axial length of the movable cylinder 540 is greater than the axial length of the side connecting bracket 500. Both ends of the movable cylinder 540 are provided with blocking rings 550, and the diameter of the blocking rings 550 is greater than the diameter of the through cavity 510. A hidden cavity 520 is opened at one end of the through cavity 510, and the inner diameter of the hidden cavity 520 is greater than the outer diameter of the blocking ring 550 and the outer diameter of the hanging head 330. In this embodiment of the invention, under the axial pulling force of the connecting rope 320, the hanging head 330 pushes the blocking ring 550 and enters the hidden cavity 520. The hanging head 330 follows the blocking ring 550 into the hidden cavity 520, which can prevent the connecting rope 320 from coming out of the movable cylinder 540 and the side connecting bracket 500.

[0033] In one embodiment, such as Figures 1-6 As shown, the side pressure unit 600 includes a side top rotating shaft 610, a force-bearing part 620, and a side pressure block 640. The side top rotating shaft 610 is rotatably mounted on the end face of the outer shell body 100 via a bearing seat. One end of the force-bearing part 620 is fixedly connected to the side wall of the side top rotating shaft 610, and the other end extends to and contacts the end face of the blocking ring 550. The outer wall of the side top rotating shaft 610 is also provided with a side top rod 630 pointing towards the inward wedge-shaped clamping block 200, and the side pressure block 640... 0 is fixed at the end of the side top rod 630; In this embodiment of the invention, when the movable cylinder 540 and the blocking ring 550 move toward the direction where the side pressure unit 600 is located, the blocking ring 550 acts on the end of the force-bearing part 620 and applies torque to it, so the side top rotating shaft 610 rotates and the side top rod 630 rotates with the side top rotating shaft 610. The side top rod 630 rotates toward the side wall of the inner wedge-shaped clamp 200 so that the side pressure block 640 abuts against the outer wall of the inner wedge-shaped clamp 200.

[0034] In one embodiment, such as Figures 1-3 As shown, the clamping surface 220 is an arc surface with abrasion-enhancing texture 230 on its surface. When the two inner wedge-shaped clamping blocks 200 clamp the optical cable 400, the two clamping surfaces 220 cooperate with each other to form a spiral pattern. In this embodiment of the invention, the arc surface can increase the contact area with the outer wall of the optical cable 400, and the spiral pattern increases the friction force, dispersing the grip over a large area. The pressure is dispersed through a large area of ​​wrapping and uniform gripping force, avoiding stress concentration.

[0035] In one embodiment, such as Figures 1-3 As shown, the tops of the two inner wedge-shaped clamps 200 are fixedly connected to front pressure sliders 210, with the front pressure sliders 210 close to the end of the inner wedge-shaped clamps 200 away from the anchoring connection unit 300. The front pressure sliders 210 are connected to the upper surface of the outer shell body 100 and can slide axially. In this embodiment of the invention, the inner wedge-shaped clamps 200 slide along the inclined plane to lock the optical cable 400. The front pressure sliders 210 move with the inner wedge-shaped clamps 200. The two front pressure sliders 210 approach each other and apply opposing forces to the inner wedge-shaped clamps 200 at their ends to increase the pressure of the inner wedge-shaped clamps 200 on the optical cable 400 and prevent relative movement between the optical cable 400 and the inner wedge-shaped clamps 200.

[0036] The above embodiment provides an optical cable tension clamp, the working principle of which is as follows:

[0037] In the initial installation stage, both inner wedge-shaped clamps 200 are located at the tail of the outer casing 100, with a relative gap between them. The operator can laterally press the optical cable 400 into the through channel 110 from the axial notch 120 on the side wall of the outer casing 100 and the gap between the two inner wedge-shaped clamps 200, thus completing the initial placement of the optical cable 400.

[0038] Subsequently, the inner wedge-shaped clamp 200 is pushed towards the front end of the through channel 110, i.e. the end away from the anchoring connection unit. Since the outer surface of the inner wedge-shaped clamp 200 and the inner wall of the outer shell body 100 form a mutually cooperating inclined sliding pair, the inner wedge-shaped clamp 200 will move along the inclined plane during this sliding process, causing the two inner wedge-shaped clamps 200 to approach each other, and the clamping surface 220 of its inner surface gradually clamps onto the outer wall of the optical cable 400.

[0039] Meanwhile, the anchoring seat 310 of the anchoring connection unit 300 or the middle of the connecting rope 320 is fixed to the support structure such as the corner tower; the hanging heads 330 at both ends of the connecting rope 320 are respectively connected to the tail locking structure on both sides; during installation, the hanging head 330 is connected to the movable cylinder 540 of the side connecting bracket 500, and the connecting rope 320 can be pressed in from the installation notch 530 of the side connecting bracket 500.

[0040] When axial tension is generated between the anchoring connection unit 300 and the optical cable 400, the system enters the working and self-locking state: the axial tension borne by the optical cable 400 is transmitted to the inner wedge clamp 200 through the friction between the outer wall of the optical cable and the clamping surface 220 of the inner wedge clamp 200; this tension will drive the inner wedge clamp 200 to tend to slide towards the tail, but due to the action of the inclined sliding pair, this sliding tendency is transformed into a force that makes the two inner wedge clamps 200 move closer to each other and radially clamp the optical cable 400, thus forming a self-locking mechanism of "the tighter it is pulled, the more firmly it is clamped", effectively preventing the optical cable from slipping. The two front pressure sliders 210 at the front end of the inner wedge clamp 200 also move together, applying opposing forces from the ends to enhance clamping stability. The abrasion texture 230 on the surface of the clamping surface 220 and the spiral texture formed by the cooperation of the two clamping surfaces 220 further increase the friction and help to disperse the gripping pressure, avoiding stress concentration on the outer sheath of the optical cable.

[0041] Tail-end auxiliary locking: The tension from the support structure borne by the anchoring connection unit 300, especially the connecting rope 320, acts on the two tail-end locking structures. Specifically, the tension causes the hanging head 330 to apply an axial force to the end of the movable cylinder 540, pushing the movable cylinder 540 and its blocking ring 550 towards the side pressure unit 600. The moving blocking ring 550 presses against the end of the force-bearing part 620 of the side pressure unit 600, generating torque, which drives the side top rotating shaft 610 to rotate; the side top rod 630 on the side top rotating shaft 610 rotates accordingly, pushing the side pressure block 640 at its end to move radially inward, clamping the tail outer wall of the inner wedge-shaped clamping block 200 from both sides; this additional radial clamping force, together with the self-locking effect generated by the optical cable tension, further increases the gripping force of the clamping surface 220 on the optical cable 400, ensuring the reliability of the anchoring.

[0042] In summary, the optical cable tension clamp achieves basic anchoring through the inclined self-locking principle between the inner wedge-shaped clamp 200 and the outer shell body 100. At the same time, the tension of the anchoring connection unit 300 triggers the tail-end locking structure to apply auxiliary clamping force to the tail of the wedge-shaped clamp, forming a double locking guarantee, ensuring stable holding and safe anchoring of the optical cable under long-term operation and high tension.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A tension clamp for optical cables, comprising a housing body and at least two opposing inner wedge-shaped clamping blocks, characterized in that, The outer shell body has an axially oriented through channel for accommodating optical cables inside, and an axial notch in the same direction and communicating with the outer shell body is provided on the side wall of the outer shell body. The inner wedge-shaped clamping block is slidably disposed inside the outer shell body and coaxially configured with the through channel. One end of the inner wedge-shaped clamping block protrudes from the tail of the outer shell body, and the inner surface of the inner wedge-shaped clamping block forms a clamping surface for contact and gripping. It also includes an anchoring connection unit and a tail-end locking structure. The tail-end locking structure consists of two symmetrically arranged on the tail-end sidewall of the main body of the outer shell. One end of the anchoring connection unit is connected to the two tail-end locking structures, and the other end is connected to the support structure. The outer surface of the inner wedge-shaped clamping block and the inner wall of the outer shell body form a mutually cooperating inclined sliding pair; When the optical cable is subjected to axial tension, the tension drives the inner wedge-shaped clamp to slide along the inclined plane and lock the optical cable. When the anchoring connection unit is subjected to tensile force, the end of the anchoring connection unit acts on the tail locking structure, which clamps the tail of the inner wedge-shaped block from both sides.

2. The optical cable tension clamp according to claim 1, characterized in that, The anchoring connection unit includes an anchor seat and a connecting rope. The anchor seat is located in the middle of the connecting rope and is used to connect to the support structure. Both ends of the connecting rope are provided with hooks, which are detachably connected to the tail locking structure.

3. The optical cable tension clamp according to claim 2, characterized in that, The tail-end locking structure includes a side connection bracket and a side pressure unit. The side connection bracket has an axial cavity inside, and an axially movable cylinder is provided inside the cavity. The arc apex of the movable cylinder and the upper surface of the cavity both have axially axially provided installation notches. The side pressure unit is located at the tail of the outer shell body, with one end extending to the end face of the movable cylinder and the other end facing the outer wall of the tail of the inner wedge-shaped clamping block.

4. The optical cable tension clamp according to claim 3, characterized in that, The axial length of the movable cylinder is greater than the axial length of the side connecting bracket. Both ends of the movable cylinder are provided with blocking rings, and the diameter of the blocking rings is greater than the diameter of the through cavity. A hidden cavity is opened at one end of the through cavity, and the inner diameter of the hidden cavity is greater than the outer diameter of the blocking ring and the outer diameter of the hanging head.

5. The optical cable tension clamp according to claim 4, characterized in that, The side pressure unit includes a side top rotating shaft, a force-bearing part, and a side pressure block. The side top rotating shaft is rotatably mounted on the end face of the outer shell body through a bearing seat. One end of the force-bearing part is fixedly connected to the side wall of the side top rotating shaft, and the other end extends to and contacts the end face of the blocking ring. The outer wall of the side top rotating shaft is also provided with a side top rod pointing inward to the wedge-shaped clamping block, and the side pressure block is fixed to the end of the side top rod.

6. The optical cable tension clamp according to claim 1, characterized in that, The clamping surface is an arc surface with abrasion-enhancing texture. When the two inner wedge-shaped clamping blocks clamp the optical cable, the two clamping surfaces cooperate with each other to form a spiral pattern.

7. The optical cable tension clamp according to claim 1, characterized in that, The tops of the two inner wedge-shaped clamps are fixedly connected to a front pressure slider, which is located near the end of the inner wedge-shaped clamp away from the anchoring connection unit. The front pressure slider is connected to the upper surface of the outer shell and can slide axially.

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