Clamping structure and cable pulling device

Abstract

The application relates to the technical field of cable construction and operation and maintenance, in particular to a clamping structure and a cable traction device. The clamping structure comprises at least two clamping arms, at least two movable arms and a connecting piece. The clamping arms are crossed with each other and are hinged at the crossing positions. One end of each clamping arm is provided with a chuck. Each clamping arm is correspondingly connected with a movable arm, and one end of the movable arm is hinged with the end of the clamping arm away from the chuck. The connecting piece is located at the end of the movable arm away from the clamping arm, and the movable arms are hinged with the connecting piece. When a traction force acts on the connecting piece, the connecting piece pulls the movable arms inward, drives the clamping arms to rotate around the crossing positions, so that the chucks are close to each other to realize clamping. The design structure is compact and small in size, can adapt to the working environment in a limited narrow space such as a cable well, and automatically converts the traction force into clamping force to realize efficient, stable and low-damage safe traction operation of the cable.

Description

Technical Field

[0001] This application relates to the field of cable construction and maintenance technology, and in particular to a clamping structure and a cable pulling device. Background Technology

[0002] In the field of power system distribution cable construction and operation and maintenance, cable laying and traction are key aspects of daily operations. With the rapid development of urban power grid construction, cable lines are increasingly widely used in distribution networks. Cable wells, as important channels and work nodes for cable laying, fault repair, and routine maintenance, typically have very limited internal space, with crisscrossing pipelines and a complex working environment. During cable laying or fault repair, it is often necessary to pull and move heavy and rigid cables within the limited underground space. Due to the limited working space within cable wells, it is difficult to use large mechanized equipment for on-site operations.

[0003] Currently, cable traction operations in confined spaces mainly rely on the following conventional devices and methods. The first is manual pulling, where workers directly pull the cable by hand or with the aid of ropes. This is the most traditional method on site, relying primarily on manpower to overcome the cable's own weight and the frictional resistance between it and the well wall or supports. The second is the hand-operated hoist traction method. This type of device uses a hand-operated hoist as a labor-saving device. Its structure mainly includes a lifting chain, a hand chain, a transmission gear set, and upper and lower hooks. During operation, one end of the hand-operated hoist needs to be fixed to the well wall or supports, and the other end is connected to the cable through a hook or wire rope loop. Workers repeatedly pull the hand chain manually, driving the internal gear set to engage and thus slowly traction and displacement of the cable. The third is a large electric traction machine. This type of equipment uses a high-power electric motor to drive a winding drum through a reduction mechanism to wind and unwind the wire rope to achieve cable traction. Although this type of electric equipment is equipped with a dedicated cable clamping and traction mechanism, it is large and heavy, and usually needs to be placed in an open area for batch traction operations.

[0004] However, during manual operation, workers directly pull the cable by hand or with the help of ropes. But the cable itself is heavy, and there is a lot of frictional resistance between it and the well wall and support when it moves in the cable well. Multiple workers are required to work together, which is extremely labor-intensive and inefficient. At the same time, it is difficult to maintain uniform and stable force when applied manually. Sudden slackening or sudden pulling can easily occur, resulting in uneven stress on the cable, which may damage the cable insulation layer. In addition, the space inside the cable well is small, making it difficult for multiple people to work at the same time, which poses a safety hazard.

[0005] Although hand-operated chain hoists can save labor through gear sets, operators still need to repeatedly pull the chain manually. This is inconvenient to operate in confined spaces such as cable wells, and prolonged operation can lead to high operator fatigue. Furthermore, hand-operated chain hoists require close-range operation, which poses a significant risk to personnel who remain in enclosed, humid environments such as cable wells where harmful gases may be present. In addition, hand-operated chain hoists are usually connected to cables via hooks or wire ropes, which makes it difficult to secure smooth 10kV insulated cables, as they are prone to slipping and falling off. Directly binding with wire ropes can also damage the cable sheath.

[0006] While large electric traction machines offer high traction force and efficiency, their bulky size and heavy weight prevent them from operating in confined spaces such as cable wells. They are only suitable for open ground areas, and the time required for equipment transportation, installation, and commissioning makes them unsuitable for situations requiring rapid response, such as emergency cable fault repair. Furthermore, their procurement and maintenance costs are high. Regarding cable fixing and gripping, existing cable clamps are mostly of fixed specifications, making it difficult to accommodate cables of different diameters. Their clamping force is also insufficient, leading to slippage under high traction forces. Additionally, rigid clamps directly gripping cables can damage the insulation, affecting cable lifespan and safe operation. Summary of the Invention

[0007] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This part of the invention is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0008] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0009] Therefore, a first aspect of the present invention provides a clamping structure.

[0010] A second aspect of the present invention provides a cable traction device.

[0011] In view of this, a first aspect of the embodiments of this application provides a clamping structure, including: At least two clamping arms, which cross each other and are hinged at the crossing position, and one end of each clamping arm is provided with a clamp; At least two movable arms, each of the clamping arms is correspondingly connected to the movable arm, and one end of the movable arm is hinged to the end of the clamping arm that is away from the chuck. A connector is located at the end of the movable arm opposite to the clamping arm, and the movable arm is hinged to the connector. When the traction force is applied to the connector, the connector pulls the movable arm inward and drives the clamping arm to rotate around the intersection, so that the clamps come closer to each other to achieve clamping.

[0012] In one possible implementation, the sides of the clamps that are close to each other have an arc-shaped clamping surface.

[0013] In one feasible implementation, an anti-slip cushioning pad is provided on the side of the clamps that are close to each other.

[0014] In one feasible implementation, it further includes: An adjustment structure, disposed on the chuck, is used to adjust the minimum distance between the relative clamping surfaces. The adjustment structure includes: A top block, wherein the top block is disposed on one side of the clamps that are close to each other; A distance adjustment element, which connects the top block and the clamp.

[0015] In one feasible implementation, the distance adjustment element includes: A rod, which is threadedly connected to the chuck, and one end of the rod is connected to the top block.

[0016] In one feasible implementation, it further includes: A rolling element is rotatably disposed on the chuck and located on the side of the chuck away from the clamping arm.

[0017] In one feasible implementation, it further includes: A lifting lug is provided on the connector.

[0018] According to a second aspect of this embodiment, a cable pulling device is provided, including the clamping structure described in any of the above technical solutions, and further comprising: A traction component, one end of which is provided with a connecting portion for connecting to the connecting component; A drive unit, the output of which is connected to the traction member, is used to drive the traction member to move.

[0019] In one feasible implementation, the drive unit includes: Rotation drive component; A drum, one end of which is connected to the output end of the rotation drive; The traction member is wound around the drum, and one end of the traction member is connected to the drum.

[0020] In one feasible implementation, it further includes: A limiting ring is provided on one side of the drum, and the traction member passes through the limiting ring; A limiting block is disposed on the traction member and located at the end of the traction member away from the drum.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects: This application provides a clamping structure and a cable traction device. By applying traction force to the connector, the linkage arm and clamping arm achieve automatic clamping. This design is compact and small in size, and can flexibly adapt to the working environment in confined and narrow spaces such as cable wells. It effectively solves the problems of large electric traction machines being unable to enter confined spaces and conflicts with manual operation space. It automatically converts traction force into clamping force, which not only avoids the high-intensity labor of directly pulling the cable by hand, but also solves the problems of personnel fatigue caused by repeated close-range operation of the chain in traditional hand chain hoists and the high risk of being trapped in harmful gas environments. At the same time, this automatic clamping method is more stable than direct binding with wire rope, and solves the problem of easy slippage and detachment of smooth cable surfaces, realizing efficient, stable and low-damage safe traction operation of cables.

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

[0023] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic structural diagram of the overall structure of a clamping structure according to an embodiment of this application; Figure 2 A schematic structural diagram of the overall structure of a cable traction device according to an embodiment of this application; Figure 3 A schematic structural diagram of the drive unit of a cable traction device according to an embodiment of this application.

[0024] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 101 Clamping arm, 102 Clamp head, 103 Movable arm, 104 Connector, 105 Lifting lug; 210 Traction component, 211 Connecting part, 220 Drive unit, 221 Rotation drive component, 222 Drum, 231 Limiting ring component, 232 Limiting block. Detailed Implementation

[0025] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the technical solutions provided by the present invention. However, it will be apparent to those skilled in the art that the technical solutions provided by the present invention can be implemented without one or more of these details.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0027] Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the invention is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art.

[0028] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0029] like Figure 1As shown, a clamping structure is proposed according to a first aspect of the present application, including at least two clamping arms 101, at least two movable arms 103, and a connector 104. The clamping arms 101 cross each other and are hinged at the crossing position. One end of each clamping arm 101 is provided with a chuck 102. Each clamping arm 101 is correspondingly connected to a movable arm 103, and one end of the movable arm 103 is hinged to the end of the clamping arm 101 away from the chuck 102. The connector 104 is located at the end of the movable arm 103 away from the clamping arm 101, and all movable arms 103 are hinged to the connector 104. When a traction force is applied to the connector 104, the connector 104 pulls the movable arm 103 inward, causing the clamping arm 101 to rotate around the crossing position, so that the chucks 102 move closer to each other to achieve clamping. The clamping structure is designed based on the lever principle, with movable arm 103 and clamping arm 101. When the traction force is applied to the connector 104, the clamp 102 generates a clamping force toward the center of the cable under the lever action. The greater the traction force, the greater the clamping force, forming a self-locking effect that tightens as it is pulled, ensuring that the cable will not slip during the traction process.

[0030] In this embodiment, the traction force acts on the connector 104, linking the movable arm 103 and the clamping arm 101 to achieve automatic clamping. This design is compact and small in size, and can flexibly adapt to the working environment in confined and narrow spaces such as cable wells. It effectively solves the problems of large electric traction machines being unable to enter confined spaces and conflicts with manual operation space. It automatically converts traction force into clamping force, which not only avoids the high-intensity labor of directly pulling the cable by hand, but also solves the problems of personnel fatigue caused by repeated close-range operation of the chain in traditional hand chain hoists and the high risk of being trapped in harmful gas environments. At the same time, this automatic clamping method is more stable than direct binding with wire rope, and solves the problem of slippage and detachment on smooth cable surfaces, realizing efficient, stable and low-damage safe traction operation of cables.

[0031] In one possible implementation, the chucks 102 have an arc-shaped clamping surface on the side that is close to each other.

[0032] In this technical solution, the curvature of the clamping surface can be designed according to the diameter specifications of commonly used cables. For example, for cables ranging from 50mm² to 300mm², the radius of the clamping surface can be designed within the range of R10mm to R25mm to increase the contact area between the clamp 102 and the cable surface. The arc-shaped clamping surface can be made of high-strength manganese steel by stamping and rust prevention treatment, or a composite structure can be adopted, with an inner metal skeleton to ensure strength and an outer arc-shaped rubber layer to increase the coefficient of friction. During operation, as the clamp 102 gradually clamps the cable, the arc-shaped clamping surface can form a good fit and coverage with the cylindrical outer surface of the cable, avoiding point contact or line contact.

[0033] Understandably, by setting an arc-shaped clamping surface, the clamping force can be more evenly distributed on the cable surface. Compared with the planar clamping method, it effectively reduces the pressure borne by the cable per unit area in a local area, reduces the risk of insulation layer deformation or damage caused by concentrated clamping force, and at the same time, the arc-shaped structure plays a certain role in lateral limiting of the cable, preventing the cable from slipping laterally from the clamp 102 during the traction process, and improving the stability of clamping.

[0034] In one feasible implementation, the chucks 102 are provided with anti-slip cushioning pads on the sides that are close to each other.

[0035] In this technical solution, the anti-slip buffer pad can be one of vulcanized rubber pads, polyurethane pads, or textured silicone pads, and is fixed to the clamping surface of the clamp 102 by adhesive, screw fixing, or embedded clip mounting. The surface of the anti-slip buffer pad can be provided with diamond-shaped, wavy, or grid-like anti-slip textures to further increase surface roughness. When the clamp 102 clamps the cable, the anti-slip buffer pad undergoes slight elastic deformation under pressure, filling the tiny unevenness on the surface of the cable insulation sheath, increasing the frictional resistance of the contact surface.

[0036] Understandably, the anti-slip buffer pad enhances the reliability of clamping by using a high-friction material, preventing slippage caused by a smooth or oily cable surface. On the other hand, the elastic deformation of the buffer pad absorbs the impact load during clamping, providing good protection for the cable insulation sheath, avoiding mechanical damage to the cable caused by rigid clamping, and extending the cable's service life.

[0037] In one feasible implementation, a rolling element is provided on the side of the clamp 102 away from the clamping arm 101. The rolling element can be a roller or a ball. When a traction force is applied to the connector 104 to pull it upward, the rolling element reduces the frictional force that causes the two opposing clamps 102 to move closer together. Alternatively, when the clamp 102 falls to the position where the cable is to be clamped, it facilitates the movement of the two clamps 102 away from each other, thus automatically opening the clamp 102.

[0038] In this technical solution, rollers can be hinged to both sides of the clamp 102 via pins. The rotation axis of the rollers is perpendicular to the swing plane of the clamping arm 101, and the outer circumferential surface of the rollers protrudes from the outer surface of the clamp 102. Alternatively, balls can be embedded in spherical grooves on the surface of the clamp 102, with a limiting structure to prevent them from coming out. Before traction operations, when the clamping structure is placed on the ground or cable support, the rollers or balls first contact the contact surface. At this time, the operator only needs to apply a small pushing force to move the clamping structure along the cable axis to the designated position, without having to lift and move the entire device. When the clamping structure is lowered to the cable position, if the position needs to be adjusted, the rolling action of the rollers reduces the resistance to the opening of the clamp 102, allowing the clamp 102 to slide smoothly around the cable.

[0039] Understandably, by setting up rolling elements, the sliding friction between the traditional chuck 102 and the contact surface is transformed into rolling friction, which significantly reduces frictional resistance. This makes it easier and more convenient for operators to move and position the device in the confined space of the cable well. It also reduces wear caused by dragging the device and improves the operational flexibility and durability of the device.

[0040] In one feasible embodiment, the clamping structure further includes an adjustment structure disposed on the chuck 102 for adjusting the minimum distance between the relative clamping surfaces. The adjustment structure includes a top block and a distance adjustment member, the top block being disposed on one side of the chuck 102 that are close to each other; the distance adjustment member connecting the top block and the chuck 102.

[0041] In this technical solution, the top block can be made of hard alloy material or high-strength plastic, and its shape can be designed to conform to the cable surface as an arc or wedge. The distance adjustment component can be a screw, telescopic rod, or linkage assembly. When the screw is rotated, it pushes the top block to move relative to the chuck 102, thereby changing the depth of the clamping space. For cables with thick insulation layers, the top block can be adjusted outward to reduce the clamping depth and prevent over-clamping; for cables with thin insulation layers or small diameters, the top block can be adjusted inward to ensure effective clamping force. Anti-slip buffer pads can also be provided on the surface of the top block. Understandably, the precise control of clamping depth is achieved through the cooperation of the top block and the distance adjustment component. The structure is simple and easy to adjust, which can effectively avoid the problem of damage to the cable due to excessive clamping or slippage due to excessive clamping caused by differences in cable diameter, thus improving the safety and reliability of clamping operations.

[0042] In one feasible implementation, the distance adjustment component includes a rod, which is threadedly connected to a clamp 102, and one end of the rod is connected to a top block.

[0043] In this technical solution, the rod is provided with external threads, and the corresponding position on the chuck 102 is provided with internal threaded holes. The rod passes through the threaded holes, and one end is connected to the top block via a ball joint or bearing, while the other end is provided with an operating handle for easy rotation. When rotating the rod, the rotational motion is converted into linear motion of the top block using the principle of threaded transmission. Furthermore, the threaded connection has a self-locking function, preventing loosening once the adjustment is in place. Operators can roughly judge the adjustment distance by observing the scale lines on the rod or by the number of rotations, achieving precise adjustment.

[0044] Understandably, the threaded connection adjustment method is not only compact and easy to manufacture, but also allows for micron-level feed adjustment through the thread's fit clearance, ensuring adjustment accuracy. At the same time, the thread's self-locking characteristic ensures that the top block position remains fixed under severe vibration or heavy load traction conditions, guaranteeing the stability of the clamping state.

[0045] In one possible implementation, the clamping structure further includes a lug 105 disposed on the connector 104.

[0046] In this technical solution, the lifting lug 105 can be designed as a U-shaped ring, a D-shaped ring, or a connecting plate structure with pin holes, and is fixed to the center position or the upper end of the traction force direction of the connecting member 104 by welding, riveting, or integral casting. The inner hole size of the lifting lug 105 must meet the connection requirements of standard hooks or wire rope loops. During assembly, the connection is completed simply by hooking the hook of the traction device into the hole of the lifting lug 105. The lifting lug 105 can also be designed as a rotating type, connected by a pin shaft, allowing the traction direction to deflect freely within a certain range, reducing the impact of lateral force on the connecting member 104.

[0047] Understandably, the lifting lug 105 provides a standardized connection interface, facilitating the quick assembly and disassembly of the traction device and clamping structure, making on-site operations more convenient and efficient. At the same time, the independent lifting lug 105 structure avoids wear caused by directly binding the traction rope to the connector 104, extending the service life of the connector 104, and is simple in structure and low in manufacturing cost.

[0048] In this design, the clamping structure employs a lever-based design with a movable arm 103 and a clamping arm 101. During traction, the clamp tightens as it is pulled, achieving a self-locking effect and ensuring the cable will not slip under a 1.5-ton traction force. The clamp 102 features a flat, round clamp design with rubber anti-slip pads, suitable for 10kV insulated cables of various sizes from 50 to 300 mm². The rounded shape and rubber layer of the clamp 102 effectively prevent damage to the cable sheath and slippage, solving the problems of difficult cable fixing and easy damage to the insulation layer in existing technologies.

[0049] like Figure 2As shown, the second aspect of this embodiment provides a cable pulling device, including the clamping structure described in any of the above technical solutions, and further including a pulling member 210 and a driving unit 220. One end of the pulling member 210 is provided with a connecting part 211, which is used to connect with the connecting member 104. The output end of the driving unit 220 is connected to the pulling member 210 and is used to drive the pulling member 210 to move. By replacing the traditional manual pulling with the driving unit 220, the cable pulling operation is mechanized, effectively reducing the labor intensity of the operators and improving work efficiency. The overall length of the pulling member 210 is controlled within 40cm, and the length of the clamping structure is controlled within 30cm. The structure is small and compact, which can adapt to the narrow working environment in confined spaces such as cable wells, solving the problem that large electric pulling machines cannot enter narrow spaces for operation. At the same time, the cable pulling device and the clamping structure adopt a separable independent modular design, which can be quickly connected to each other through hooks. If necessary, steel wire ropes can be added between the hooks to adapt to different operating requirements. It is easy to transport, carry and quickly assemble on site, and has high mobility. It is particularly suitable for occasions that require rapid response, such as cable fault repair. The traction component 210 can be made of steel strand, possessing sufficient tensile strength to meet the 1.5-ton traction force requirement. The rope length is pre-designed to be 10-20m, and can be adjusted according to actual site requirements. The connecting part 211 can be a hook, connecting the two structural parts together. The hook has an anti-loosening buckle to ensure a safe and reliable connection, while also facilitating quick on-site assembly, disassembly, and transport.

[0050] like Figure 3 As shown, in one feasible embodiment, the drive unit 220 includes a rotary drive component 221 and a drum 222, one end of which is connected to the output end of the rotary drive component 221; a traction component 210 is wound around the drum 222, and one end of the traction component 210 is connected to the drum 222. The rotary drive component 221 can be a motor or a reducer. This device can remotely control the motor to rotate forward and backward to achieve the winding and unwinding function, and is equipped with an emergency stop button, allowing operators to operate from safe locations such as outside the cable well, avoiding prolonged stays of personnel in the confined, humid cable well where harmful gases may exist, significantly improving operational safety. The reducer adopts a multi-stage planetary gear set or worm gear transmission structure to achieve a large reduction ratio and torque amplification, converting the power output by the motor into a low-speed, high-torque traction force. The gear set is made of alloy steel, which has sufficient strength and wear resistance after heat treatment. The reducer is externally encased in a high-strength metal shell to protect the internal gear mechanism, and an emergency stop button is provided on the shell to immediately cut off the motor power and stop the traction operation in an emergency. This solution replaces manual drive with a small motor, which drives a gear set to achieve high torque output. The rotational motion output by the motor is converted into the linear winding and unwinding motion of the traction steel wire rope, achieving a traction force output of 1.5 tons.

[0051] In this technical solution, the rotating drive component 221 can specifically be a DC brushless motor paired with a planetary reducer, or an AC asynchronous motor paired with a worm gear reducer. The transmission ratio design must meet the torque requirement of outputting 1.5 tons of pulling force at rated power. The surface of the drum 222 can be designed with spiral rope grooves to guide the traction component 210 to wind neatly and prevent rope tangling. The height of the edge of the side plate of the drum 222 should exceed the total thickness of the winding layers to prevent the wire rope from slipping out. The reducer housing can serve as the mounting base for the motor and the drum 222, forming an integrated power head. During operation, the operator starts the motor. The high-speed rotation of the motor output shaft is reduced and increased in torque by the reducer, driving the drum 222 to rotate at a low speed, thereby winding the traction component 210 and applying continuous tension to the clamping structure.

[0052] Understandably, the continuous output of traction force is achieved through the cooperation of the rotating drive component 221 and the drum 222, which greatly improves traction efficiency compared to the intermittent operation of manual tools. The reducer allows a small-power motor to output high torque, reducing the weight and size of the entire machine, making it easy to carry and deploy in confined spaces. At the same time, the mechanized transmission method ensures the stability of the traction speed and reduces the impact load on the cable.

[0053] In one feasible embodiment, the cable traction device further includes a limiting ring 231 and a limiting block 232. The limiting ring 231 is disposed on one side of the drum 222, and the traction member 210 passes through the limiting ring 231. The limiting block 232 is disposed on the traction member 210 and located at the end of the traction member 210 away from the drum 222. A multi-purpose hook is also provided on the top of the housing of the electric traction device for connecting the entire traction mechanism to a stable or heavy-duty structure. The multi-purpose hook is forged from high-strength alloy steel and has an anti-drop buckle (such as a spring-loaded safety buckle) to prevent accidental detachment during traction. It can be connected to a stable pole base, a sturdy steel frame structure, or a firmly driven, non-loose grounding rod, etc., as a support point for the traction endpoint. During operation, connect the multi-purpose hook to the stable structure on site and confirm that the anti-drop buckle is locked; start the motor to rotate forward via remote control, and the reducer drives the drum 222 to rotate and wind up the traction wire rope. The wire rope pulls the clamping structure and cable to the traction endpoint through the connecting hook; when it is necessary to loosen the cable, control the motor to reverse and release the wire rope; in case of emergency, press the emergency stop button to cut off the power.

[0054] In this technical solution, the limiting ring 231 can be an annular boss welded to the housing or a guide pulley seat, with its inner diameter slightly larger than that of the traction member 210, ensuring that the traction member 210 can slide smoothly without significant swaying. The limiting block 232 can be a metal sleeve pressed against the end of the traction member 210 or a locking block secured by bolts, with its size larger than the inner diameter of the limiting ring 231. When the traction member 210 is extended to its end, the limiting block 232 will be blocked by the limiting ring 231, preventing the traction member 210 from completely detaching from the drum 222 or getting caught inside the mechanism. The multi-purpose hook can be mounted on the top of the housing via a rotating shaft, enabling multi-angle rotation adjustment. The opening size of the hook should meet the size requirements of common fixed piles on site. During traction operations, the multi-purpose hook acts as a fixed anchor point, bearing the entire traction reaction force, ensuring that the main body of the device remains stable, and the cable movement can be completed simply by retracting or extending the traction member 210.

[0055] Understandably, the cooperation between the limiting ring 231 and the limiting block 232 constitutes a mechanical anti-detachment protection mechanism, effectively avoiding the risk of injury from the traction component 210 flying off due to misoperation or loss of control, and improving the safety protection level of the device. The multi-purpose hook design allows the device to be quickly fixed using the site environment without the need for additional ground stakes or moving heavy objects as counterweights, adapting to the complex and ever-changing working environment around cable wells, and further improving on-site applicability and operational efficiency.

[0056] The overall work process is as follows: 1) Preparation stage: The operator brings the cable pulling device and clamping structure to the work site; connects the multi-purpose hook of the cable pulling device to the stable structure on site and locks the anti-drop buckle; selects and installs the appropriate clamp 102 according to the cable model.

[0057] 2) Installation stage: Open the clamp 102 of the clamping structure, put the cable to be pulled in, and pre-clamp it; connect the connecting hook at the end of the traction wire rope to the connecting hook or lifting lug 105 of the clamping structure and lock the anti-drop buckle.

[0058] 3) Traction stage: The operator retreats to a safe position and holds the remote control device; the motor is started and rotates forward, the traction wire rope gradually tightens and generates traction force; the clamping structure self-locks under the action of traction force, the clamp 102 is pulled tighter and tighter, and the cable is stably pulled to the end point; the traction speed and start / stop can be controlled in real time via remote control.

[0059] 4) Release phase: After the cable reaches the target position, control the motor to reverse and loosen the traction wire rope; release the clamping structure 102 to release the cable; disconnect the two hooks and remove the device.

[0060] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit 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 this invention.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A clamping structure, characterized in that, include: At least two clamping arms, which cross each other and are hinged at the crossing position, and one end of each clamping arm is provided with a clamp; At least two movable arms, each of the clamping arms is correspondingly connected to the movable arm, and one end of the movable arm is hinged to the end of the clamping arm that is away from the chuck. A connector is located at the end of the movable arm opposite to the clamping arm, and the movable arm is hinged to the connector. When the traction force is applied to the connector, the connector pulls the movable arm inward and drives the clamping arm to rotate around the intersection, so that the clamps come closer to each other to achieve clamping.

2. The clamping structure according to claim 1, characterized in that: The clamps have an arc-shaped clamping surface on the side where they are close to each other.

3. The clamping structure according to claim 1, characterized in that: The sides of the clamps that are close to each other are provided with anti-slip cushioning pads.

4. The clamping structure according to claim 1, characterized in that, It also includes an adjustment structure disposed on the chuck for adjusting the minimum distance between the relative clamping surfaces, the adjustment structure comprising: A top block, wherein the top block is disposed on one side of the clamps that are close to each other; A distance adjustment element, which connects the top block and the clamp.

5. The clamping structure according to claim 4, characterized in that, The distance adjustment component includes: A rod, which is threadedly connected to the chuck, and one end of the rod is connected to the top block.

6. The clamping structure according to claim 1, characterized in that, Also includes: A rolling element is rotatably disposed on the chuck and located on the side of the chuck away from the clamping arm.

7. The clamping structure according to claim 1, characterized in that, Also includes: A lifting lug is provided on the connector.

8. A cable traction device, characterized in that, The clamping structure comprising any one of claims 1 to 7 further comprises: A traction component, one end of which is provided with a connecting portion for connecting to the connecting component; A drive unit, the output of which is connected to the traction member, is used to drive the traction member to move.

9. The cable traction device according to claim 8, characterized in that, The driving unit includes: Rotation drive component; A drum, one end of which is connected to the output end of the rotation drive; The traction member is wound around the drum, and one end of the traction member is connected to the drum.

10. The cable traction device according to claim 9, characterized in that, Also includes: A limiting ring is provided on one side of the drum, and the traction member passes through the limiting ring; A limiting block is disposed on the traction member and located at the end of the traction member away from the drum.

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