Anti-drop grounding wire clamp self-adaptive to wire diameter

Abstract

The invention relates to the technical field of electric power system safety tools and instruments, in particular to a self-adaptive wire diameter anti-drop grounding wire clamp which comprises a tubular shell, a driving rod assembly, a hook body assembly and a jacking block. The driving rod assembly is axially and movably arranged in the tubular shell, and one end of the driving rod assembly is connected with the control inhaul cable. The hook body assembly is connected to the lower end of the tubular shell and comprises a main hook body, a pressing plate and a rotatable hook plate. The main hook body is provided with a hook groove with an opening in one side, the pressing plate is connected to the upper portion of the main hook body through a first rotating shaft, and the rotatable hook plate is connected to the lower portion of the main hook body through a second rotating shaft. The jacking block is connected to the other end of the driving rod assembly and makes contact with the pressing plate. The driving rod assembly comprises a guide rod, a lead sleeve, a power spring and a recovery spring. The grounding wire clamp is extremely easy and convenient to operate, absolutely reliable in clamping, high in adaptability, good in hooking guiding performance, rapid and reliable in unhooking and easy and convenient to maintain.

Description

Technical Field

[0001] This invention relates to the field of power system safety tools and equipment, specifically to an adaptive conductor diameter anti-derailment grounding clamp. Background Technology

[0002] In power system maintenance, the reliable connection of grounding wires is crucial for ensuring the safety of personnel and equipment. To prevent the installed grounding wires from loosening or falling off due to external forces or vibrations during operation, they must be securely fixed to the conductors or electrical equipment using specialized grounding clamps. Currently, the industry mainly uses three types of grounding clamps: bolt-type with insulated operating rods, hook-type with spring clamps, and duckbill-type gravity impact clamps (also known as throw-type). Bolt-type clamps with insulated operating rods tighten the conductor by rotating the operating rod, providing a stable and secure clamp that is not easily loosened. However, their effective operating distance is limited, making them difficult to use at remote or high locations, and repeated rotation while wearing insulated gloves is extremely inconvenient. Hook-type clamps rely on spring force to press the conductor into the hook, allowing for quick installation and removal. However, they are also limited by operating distance and cannot meet the needs of long-distance connection. Furthermore, their clamping force is limited, posing a risk of loosening in strong winds or when the conductor sways. Duckbill-type gravity impact clamps require being dropped from above the conductor, using their own weight to trigger an internal mechanism for clamping. While offering some anti-derailment capability, they have stringent requirements for the working position; the operator must be directly above the conductor, which is nearly impossible in locations far from the tower, such as corner jumpers on inner corner towers. Furthermore, in windy conditions, aligning the clamp opening with the conductor is extremely difficult, resulting in a low success rate and long processing time. More seriously, these clamps often fail to release properly during disassembly due to internal mechanism jamming, even after the control rope is broken. This often necessitates workers using ladders or other tools to climb to the conductor and manually troubleshoot, which is not only inefficient but also poses significant safety risks. In conclusion, existing grounding clamp technologies fail to balance ease of operation, reliable connection, and adaptability to complex working conditions. There is an urgent need for a universal grounding clamp that enables rapid connection, absolute anti-derailment, adaptability to wire diameter, and easy disassembly to solve the practical problems encountered in overhead line maintenance. Summary of the Invention

[0003] This invention addresses the technical shortcomings of existing overhead line grounding clamps in practical applications, such as inconvenient operation, difficulty in balancing anti-derailment performance and adaptability, difficulty in long-distance installation and removal, and easy jamming during disassembly. It provides a novel, highly integrated, and reliable adaptive conductor diameter anti-derailment grounding clamp. Through the design of an internal precision linkage mechanism, this clamp achieves rapid conductor insertion, adaptive clamping, absolute anti-derailment, and dynamic release, relying solely on a single control rope. This solves the problem of traditional grounding clamps struggling to balance safety, versatility, and operational efficiency in complex operating environments.

[0004] To achieve the above objectives, the present invention provides an adaptive conductor diameter anti-derailment grounding clamp, comprising: Tubular outer shell; A drive rod assembly, part of which is axially movable within the tubular housing, has one end connected to an external control cable; A hook assembly connected to the lower end of the tubular outer shell; the hook assembly includes: The main hook body has a hook groove that opens to the side; A pressure plate, which is rotatably connected to the main hook body via a first rotating shaft, and is located in the upper region of the hook groove; A rotatable hook plate is rotatably connected to the main hook body via a second pivot and is located in the lower region of the hook groove; A top pressure block, which is connected to the other end of the drive rod assembly and located in the main hook body; The lower end of the top pressure block is in contact with the pressure plate.

[0005] In some embodiments, the hook assembly further includes a pressure plate clamp, the pressure plate including a pressure plate body and an annular portion at its end; the annular portion includes two parallel and spaced annular clamps forming a gap between the two annular clamps, the pressure plate clamp is located within the gap, and is rotatably connected by the first rotating shaft.

[0006] In some embodiments, the free end of the rotatable hook plate is provided with an axially extending guide groove.

[0007] In some embodiments, the pressure plate body of the pressure plate is provided with a cam surface; the cam surface is located at one end of the pressure plate body near the top pressure block; the lower end of the top pressure block is in contact with the cam surface.

[0008] In some embodiments, the cam surface is a partial surface on the pressure plate that contacts the top pressure block.

[0009] In some embodiments, the drive rod assembly includes a guide rod, a lead sleeve fixed within the tubular housing, a power spring and a return spring sleeved on the guide rod; the guide rod is axially movable through the lead sleeve; the power spring is located inside the lead sleeve; the return spring is located outside the lead sleeve, with one end of the return spring contacting the lead sleeve and the other end contacting a retaining ring fixed on the guide rod.

[0010] In some embodiments, the tubular housing includes a housing body, an upper end cap, and a lower end cap; the upper end cap and the lower end cap are respectively connected to the upper and lower ends of the housing body; the guide sleeve is fixed to the upper end cap; and the main hook body is fixed to the lower end cap.

[0011] In some embodiments, the inner surface of the pressure plate is a first clamping surface, and the inner surface of the rotatable hook plate is a second clamping surface, wherein the first clamping surface and the second clamping surface are disposed opposite to each other.

[0012] In some embodiments, the free end of the rotatable hook plate bends outward toward the opening of the hook groove.

[0013] In some embodiments, an insulated operating rod connector is also included, which is fixed to the top of the tubular housing.

[0014] The technical solution of this invention is based on the above-described structure. Initially, the retraction spring is compressed, the power spring is released or slightly compressed, the top pressure block is in contact with the cam surface of the pressure plate but no downward pressure is applied, the pressure plate is in the hook groove under the action of its own torsion spring, and the rotatable hook plate remains open under the action of the positioning spring. When a hooking operation is required, the operator pulls the drive rod assembly via the control cable, causing the guide rod to move upward against the elastic force of the retraction spring, while simultaneously compressing the power spring. The upward movement of the guide rod causes the top pressure block to move upward synchronously, releasing the pressure on the pressure plate. At this time, the pressure plate rotates upward and resets under the action of the torsion spring, the rotatable hook plate remains open, and the entire hook groove is in an open state. The operator can align the hook groove opening of the wire clamp with the wire. After the wire contacts the free end of the bent extension of the rotatable hook plate, it slides into the hook groove along the guide groove. After hooking the wire, the operator releases the control cable. The retraction spring releases its stored elastic potential energy, pushing the retaining ring and the guide rod to quickly return to their original position downwards. The downward movement of the guide rod causes the top pressure block to move downwards, and the lower end face of the top pressure block acts on the cam surface of the pressure plate, forcing the pressure plate to rotate downwards around the first pivot axis. When the pressure plate rotates downwards, its first clamping surface and the second clamping surface of the inner surface of the rotatable hook plate work together to clamp the wire from both the top and bottom. At the same time, during the downward pressing process, the cam surface at the root of the pressure plate body pushes against one end of the rotatable hook plate, causing the rotatable hook plate to rotate slightly, thereby supporting the wire from below and forming a three-point clamping. The power spring continuously applies downward pressure to the pressure plate through the top pressure block, and this pressure is transmitted to the wire through the pressure plate, forming an adaptive clamping force. Since the direction of the spring force of the power spring is opposite to the possible direction of wire release, and a stable mechanical structure is formed between the pressure plate, the top pressure block, and the drive rod assembly, the wire is firmly locked in the hook groove and cannot be released on its own until the control cable is actively pulled to release this structure. When the clamp needs to be removed, pull the control cable again to move the guide rod and top pressure block upward, releasing the pressure on the pressure plate. The pressure plate rotates upward and resets under the action of the return torsion spring, releasing the wire. The rotatable hook plate also returns to its open state under the action of the positioning spring. At this time, the wire can be removed from the open hook groove. The entire clamping and releasing process is completed by a single pulling and releasing action of the control cable.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The adaptive conductor diameter anti-detachment grounding clamp provided by this invention integrates the drive rod assembly and spring mechanism into a sealed tubular shell, and adopts a hook structure combining a pressure plate driven by a top pressure block and a rotatable hook plate, achieving multiple beneficial effects. Firstly, it is extremely easy to operate; a single pulling action is sufficient for attachment and detachment, adapting to working environments where insulated gloves are worn, and there are no specific requirements for the operating position; it can be operated from the side or below the conductor. Secondly, the clamping is absolutely reliable. Utilizing the continuous pressure of the power spring and the cooperation between the cam surface and the pressure plate to form a mechanical self-locking mechanism, in the clamped state, unless the control cable is actively operated, the clamp cannot automatically open due to external vibration or wind force, fundamentally eliminating the risk of loosening. Thirdly, it has strong adaptability; the spring-driven pressure plate mechanism can automatically adjust the clamping range, adapting the first clamping surface to the second clamping surface and firmly clamping conductors of different diameters, achieving versatility. Fourth, it offers excellent hook-up guidance; the rotatable hook plate and its guide groove design make it easy to guide the wire into the hook groove, reducing alignment difficulties in complex working conditions. Fifth, it offers quick and reliable unhooking; the built-in retraction spring provides positive unhooking force, ensuring the wire clamp can open quickly and smoothly to release the wire. Sixth, it is easy to maintain; the overall structural design optimizes moving parts, greatly reducing the probability of jamming, and in extreme cases, emergency dismantling can be performed by increasing the pulling force to pull the control cable. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] In the attached diagram: Figure 1-1 This is a schematic diagram of the overall structure of an adaptive conductor diameter anti-detachment grounding clamp according to the present invention; Figure 1-2 This is a schematic diagram of the overall structure of another embodiment of the present invention; Figure 2 This is a cross-sectional view of the adaptive conductor diameter anti-detachment grounding clamp according to an embodiment of the present invention; Figure 3 This is an exploded structural diagram of an adaptive conductor diameter anti-detachment grounding clamp according to the present invention; Figure 4 This is an exploded structural diagram of the pressure plate, the rotatable hook plate, and the pressure plate clamping piece according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of a rotatable hook plate according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached drawings: 1. Tubular outer shell; 2. Drive rod assembly; 4. Hook assembly; 5. Top pressure block; 11. Outer shell body; 12. Upper end cover; 13. Lower end cover; 21. Lead sleeve; 22. Guide rod; 23. Power spring; 24. Retraction spring; 222. Retaining ring; 41. Main hook body; 42. Pressure plate; 43. Rotatable hook plate; 44. Pressure plate clamping piece; 421. First rotating shaft; 431. Second rotating shaft; 411. Hook groove; 42a. Pressure plate body; 42b. Circular part; 42c. Gap; 423. First clamping surface; 433. Second clamping surface; 424. Cam surface; 435. Guide groove; 5. Connecting part. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Please refer to Figure 1 to Figure 5 This invention provides an adaptive conductor diameter anti-derailment grounding clamp, comprising a tubular outer shell 1, a drive rod assembly 2, a hook assembly 4, and a top pressure block 5. The tubular outer shell 1 serves as the external support and sealing structure for the entire device, housing and protecting the drive rod assembly 2 and the top pressure block 5, while also acting as the main frame connecting the hook assembly 4. The drive rod assembly 2 is axially movable along the internal central axis of the tubular outer shell 1, with an external control cable connected to its upper end. This control cable passes through the top of the tubular outer shell 1 and extends to the outside, allowing for remote operation by the operator. The hook assembly 4 is fixedly connected to the lower end of the tubular outer shell 1, used for clamping and locking the overhead conductor. The top pressure block 5 is connected to the lower end of the drive rod assembly 2 and located inside the main hook 41 of the hook assembly 4. Its lower end face is in contact with the cam surface 424 of the pressure plate 42, driving the rotation of the pressure plate 42 through axial displacement. Specifically, the upper end of the guide rod 22 of the drive rod assembly 2 extends to the outside of the tubular housing 1 and is provided with a connection structure for connecting an external control cable. This connection structure can be a threaded hole, a quick-release pin, a shackle, or any other detachable connection method common in the art. One end of the guide rod 22 has a connector with a through hole through which a buckle or loop at one end of the control cable can pass and be secured. The control cable is typically a flexible rope, wire rope, or insulated rod, the length of which can be selected according to the actual operating distance required. The free end of the cable usually has a loop for easy hand-holding or hooking. The control cable is not a fixed component of the clamp product, but rather an operating accessory that can be flexibly selected according to the working environment and operating method.

[0021] refer to Figure 1-2 In a preferred embodiment, a connecting part 5 is fixedly connected to the upper part of the drive rod assembly 2. The connecting part 5 is used to connect and fix with an external rope or chain lock. Specifically, the connecting part 5 is a ring-shaped component. In other embodiments, the connecting part can also be a component of other shapes, such as C-shaped, nail-shaped, etc.

[0022] like Figure 2 As shown, the tubular outer casing 1 consists of three parts: the outer casing body 11, the upper end cover 12, and the lower end cover 13. The outer casing body 11 is a hollow cylindrical metal tube made of high-strength aluminum alloy and surface-treated to enhance corrosion resistance and insulation. The upper end cover 12 is a circular metal plate with a diameter slightly larger than the outer diameter of the outer casing body 11, and a through hole in its center for threading a control cable. The upper end cover 12 is fixed to the upper surface of the outer casing body 11 by multiple screws evenly distributed circumferentially, achieving a detachable connection for easy assembly and maintenance of internal components. The upper part of the lower end cover 13 is welded to the lower end of the outer casing body 11. The upper end cover 12 and the lower end cover 13 together with the outer casing body 11 form a closed cavity, effectively preventing dust, rainwater, and foreign objects from entering the internal moving mechanism.

[0023] The drive rod assembly 2 includes a guide rod 22, a guide sleeve 21, a power spring 23, a return spring 24, and a retaining ring 222. The guide rod 22 is axially movable and passes through the guide sleeve 21; the power spring 23 is located inside the guide sleeve 21; the return spring 24 is located outside the guide sleeve 21, with one end of the return spring 24 contacting the guide sleeve 21 and the other end contacting a retaining ring 222 fixed to the guide rod 22. The tubular outer shell 1 includes an outer shell body 11, an upper end cover 12, and a lower end cover 13; the upper end cover 12 and the lower end cover 13 are respectively connected to the upper and lower ends of the outer shell body 11; the guide sleeve 21 is fixed to the upper end cover 12; and the main hook body 41 is fixed to the lower end cover 13.

[0024] Specifically, the guide sleeve 21 is a cylindrical metal component made of stainless steel. Its outer wall is fixedly embedded in the central hole of the upper end cover 12 by an interference fit, ensuring that it does not rotate relative to each other or move axially during use. The guide rod 22 is a slender cylindrical rod made of tempered steel, and its surface can be chrome-plated to improve wear resistance. The guide rod 22 is axially slidably inserted into the inner hole of the guide sleeve 21. Its upper end extends out of the upper end cover 12 and is fixedly connected to the control cable, and its lower end extends into the tubular outer shell 1 and is fixedly connected to the top pressure block 5. The axial movement stroke of the guide rod 22 is limited by the length of the guide sleeve 21 and the internal limiting structure.

[0025] The power spring 23 is a helical compression spring, sleeved on the guide rod 22 and located inside the cavity of the guide sleeve 21. The upper end of the power spring 23 contacts the inner stepped surface of the guide sleeve 21, and the lower end contacts an annular stepped surface fixed to the guide rod 22. When the guide rod 22 moves downward, the power spring 23 is compressed and stores energy; its elastic force is always directed downward along the axis of the guide rod 22, thus continuously applying a downward force to the top pressure block 5 during clamping. The elastic coefficient of the power spring 23 is designed and selected according to the required clamping force.

[0026] The recovery spring 24 is another helical compression spring, sleeved on the guide rod 22 and located outside the guide sleeve 21, above the upper end cover 12. The lower end of the recovery spring 24 contacts the top surface of the upper end cover 12, and the upper end contacts the lower surface of the retaining ring 222. The retaining ring 222 is a ring-shaped metal part, fixedly sleeved on the upper part of the guide rod 22 by an interference fit, located above the recovery spring 24. When the operator pulls the control cable, the guide rod 22 moves upward, causing the retaining ring 222 to compress the recovery spring 24, storing elastic potential energy; when the control cable is released, the recovery spring 24 releases energy, pushing the retaining ring 222 and the guide rod 22 to quickly return to their original position downward. The elastic coefficient of the recovery spring 24 is less than that of the power spring 23 to ensure that the reset action takes precedence over the clamping action.

[0027] like Figure 2 and Figure 3 As shown, the hook assembly 4 includes a main hook body 41, a pressure plate 42, and a rotatable hook plate 43. The main hook body 41 is a C-shaped component fixed to the lower end face of the lower end cover 13. The lower end of the main hook body 41 forms a hook groove 411 that opens to the side for accommodating the overhead wire to be clamped. The inner surface of the rotatable hook plate 43 is a second clamping surface 433, which is treated, for example, by sandblasting, to increase the friction between the surface and the wire.

[0028] like Figure 4As shown, the pressure plate 42 is rotatably connected to the main hook body 41 via a first rotating shaft 421, located in the upper region of the hook groove 411. The first rotating shaft 421 is a cylindrical pin, with both ends inserted into pin holes on the side walls of the main hook body 41, and locked by cotter pins or elastic retaining rings to prevent axial dislodgement. The pressure plate 42 includes a pressure plate body 42a and an annular portion 42b at its end, which is integrally formed or fixedly connected to the pressure plate body 42a. The pressure plate body 42a is an arc-shaped plate structure with good elasticity and fatigue strength. The inner surface of the annular portion 42b is a first clamping surface 423, which is opposite to the second clamping surface 433 of the rotatable hook plate 43. When closed, the two form an upper and lower clamping area for clamping the wire. The hook body assembly 4 also includes a pressure plate clamping piece 44, which is located within the gap 42c and rotatably connected via the first rotating shaft 421. Specifically, the first rotating shaft 421 is sequentially inserted into one annular clamping piece, the pressure plate clamping piece 44, the side wall of the hook groove 411 of the main hook body 41, and another annular clamping piece of the annular part 42b.

[0029] The annular portion 42b is located at the end of the pressure plate body 42a and has a U-shaped bent structure, including two parallel and spaced annular clips. The side wall of the hook groove 411 of the main hook body 41 is inserted into the gap 42c between the two annular clips, and is rotatably connected by the first rotating shaft 421 passing through the pin hole between the two annular clips 22 and the main hook body 41. This structure ensures that when the pressure plate 42 rotates around the first rotating shaft 421, its movement trajectory is constrained by the gap 42c, effectively preventing the pressure plate 42 from moving in the axial direction and improving the stability and accuracy of rotation.

[0030] The pressure plate body 42a has a cam surface 424 at one end near the top pressure block 5. The cam surface 424 is located at the end of the pressure plate body 42a near the top pressure block 5. The cam surface 424 is an inclined structure with a precision-machined surface. The cam surface 424 faces the lower end face of the top pressure block 5, and the two maintain surface contact. When the top pressure block 5 moves downward, its lower end face slides along the cam surface 424, converting the axial pressure into a downward rotational torque of the pressure plate 42 around the first rotating shaft 421, achieving efficient force transmission. The pressure plate 42 is also equipped with a return torsion spring, which is sleeved on the first rotating shaft 421, with one end fixed to the main hook body 41 and the other end fixed to the pressure plate 42. Its elastic force causes the pressure plate 42 to rotate upward, so that the hook groove 411 is in an open state.

[0031] The rotatable hook plate 43 is rotatably connected to the main hook body 41 via a second rotating shaft 431, located in the lower region of the hook groove 411. The second rotating shaft 431 is a cylindrical pin, with both ends inserted into pin holes in the lower sidewall of the main hook body 41 and fixed by elastic retaining rings. The rotatable hook plate 43 is an arc-shaped metal plate, with its fixed end connected to the main hook body 41 via the second rotating shaft 431, and its free end bending outward toward the opening of the hook groove 411 to form a trumpet-shaped guide structure, significantly increasing the fault tolerance space during initial engagement.

[0032] like Figure 2 and Figure 5 As shown, the free end of the rotatable hook plate 43 is provided with an axially extending guide groove 435. The guide groove 435 is a through groove, and its axis is parallel to the center line of the hook groove 411, providing a clear guiding path for the wire to slide into the hook groove 411. When the wire contacts the curved end of the rotatable hook plate 43 from the side, it will naturally slide into the guide groove 435 and enter the interior of the hook groove 411 along its length. The rotatable hook plate 43 is also connected to a positioning spring, one end of which is fixed to the main hook body 41 and the other end is fixed to the rotatable hook plate 43. Its elastic force keeps the rotatable hook plate 43 in an outward-open state. During the pressing process of the pressure plate 42, the root of the pressure plate body 42a will push against the inner end face of the rotatable hook plate 43, causing it to rotate inward to a certain extent, thereby supporting the wire from below. Together with the second clamping surface 433 of the rotatable hook plate 43 and the first clamping surface 423 of the pressure plate 42, a three-point clamping structure is formed, making the clamping more stable.

[0033] like Figure 2 As shown, the top pressure block 5 is a cylindrical metal block whose surface can be hardened to increase its hardness. The top pressure block 5 is fixedly connected to the lower end of the guide rod 22, and its lower end face is an arc-shaped surface that maintains contact with the cam surface 424 of the pressure plate 42. The outer diameter of the top pressure block 5 is smaller than the inner diameter of the tubular outer shell 1 to ensure that it does not interfere with the inner wall of the outer shell during its up-and-down movement. During the clamping process, the top pressure block 5 continuously applies downward pressure to the cam surface 424 under the action of the power spring 23. This pressure is converted into a clamping force on the wire by the pressure plate 42 and is self-locked by the mechanical structure to prevent loosening.

[0034] The adaptive conductor diameter anti-derailment grounding clamp also includes an insulated operating rod connector, which is fixed to the top of the tubular housing 1. The insulated operating rod connector is an external threaded joint made of high-strength engineering plastic, possessing excellent electrical insulation performance and mechanical strength. This connector is used to mate with the threaded interface at the end of a standard insulated operating rod, enabling remote operation and is suitable for live-line working or high-altitude work scenarios.

[0035] In another embodiment of the invention, the cam surface 424 of the pressure plate 42 can be replaced with a segment of arc surface. The radius of curvature of this arc surface is designed such that its center is located on or near the extension line of the first rotating shaft 421. This arc surface forms rolling contact or near-rolling contact with the lower end face of the top pressure block 5, which can further reduce frictional resistance, make the rotation of the pressure plate 42 smoother, reduce wear, and extend service life. The remaining structure is basically the same as in the first embodiment, and will not be described again here.

[0036] In another embodiment of the invention, one or more pairs of elastic guide rollers may be added to the guide groove 435 of the rotatable hook plate 43. The rollers are mounted on the side walls of the guide groove 435 via short shafts, and the rollers may be made of a low-friction coefficient material, such as polytetrafluoroethylene or nylon. When the wire slides into the guide groove 435, the rollers contact its surface, converting sliding friction into rolling friction, significantly reducing the hooking resistance. This design is particularly suitable for wires with poor surface conditions, such as oxidized, dirty, or icy surfaces, ensuring smooth wire insertion, improving the hooking success rate, and reducing scratches on the wire surface. The remaining structure is basically the same as in the first embodiment and will not be described again here.

[0037] In another embodiment of the invention, the mounting positions of the power spring 23 and the return spring 24 are interchangeable. Specifically, the power spring 23 is positioned outside the guide sleeve 21 and above the upper cover 12, while the return spring 24 is positioned inside the guide sleeve 21. In this case, the upper end of the power spring 23 contacts the retaining ring 222, and the lower end contacts the upper cover 12; the upper end of the return spring 24 contacts the internal step of the guide sleeve 21, and the lower end contacts the annular step of the guide rod 22. This modified structure also achieves clamping and resetting functions, and its mechanical behavior is consistent with the original design. This layout change can adapt to different internal space constraints or assembly process requirements. The remaining structure is basically the same as in the first embodiment and will not be described again here.

[0038] In another embodiment of the present invention, the outer shell body 11 of the tubular outer shell 1 can adopt a segmented structure, for example, it can be formed by connecting an upper shell section and a lower shell section through a flange. A sealing ring, such as an O-ring, is provided between the upper shell section and the lower shell section to ensure internal sealing. This structure facilitates the inspection, replacement, or maintenance of internal components such as the guide rod 22 and springs without disassembling the end caps, thus improving the ease of maintenance of the device. The remaining structure is basically the same as in the first embodiment, and will not be described again here.

[0039] In another embodiment of the present invention, the second clamping surface 433 of the rotatable hook plate 43 may be provided with a plurality of transverse anti-slip teeth. The first clamping surface 423 of the pressure plate 42 is correspondingly provided with a matching tooth structure. The teeth may be arranged in a sawtooth shape, a wavy shape, or other shapes that can increase friction. When the pressure plate 42 closes to clamp the wire, the upper and lower tooth structures can enhance the biting force on the wire, effectively preventing the wire from slipping or loosening under the action of strong wind, vibration, or sudden external force (such as short-circuit electrodynamic force), thus improving the reliability of clamping. The remaining structure is basically the same as in the first embodiment, and will not be described again here.

[0040] In another embodiment of the present invention, the connection between the retaining ring 222 and the guide rod 22 can be changed from an interference fit to a threaded connection. That is, an external thread is machined on the upper end of the guide rod 22, and a matching internal thread is provided at the center of the retaining ring 222; the two are fixed by screwing. This structure facilitates adjustment of the axial position of the retaining ring 222 on the guide rod 22, thereby adjusting the pre-compression of the recovery spring 24. This allows for fine-tuning of the required force when the operator pulls the control cable, adapting to different operator preferences or operational needs under different working environments. The remaining structure is basically the same as in the first embodiment and will not be described again here.

[0041] In another embodiment of the invention, a corrugated protective sleeve may be fitted over the control cable. This protective sleeve protects the control cable from external environmental corrosion (such as ultraviolet radiation, rain, and oil), while preventing it from tangling with other objects, thus improving operational safety and extending the cable's service life. One end of the protective sleeve may be fixed to the upper end cap 12 of the tubular outer casing 1.

[0042] In another embodiment of the invention, a wear-resistant pad, such as one made of copper-based alloy or engineering plastic, may be embedded in the lower end face of the pressure block 5. This wear-resistant pad contacts the cam surface 424 of the pressure plate 42, reducing the coefficient of friction between them, lowering operating resistance and wear, and making the operation more sensitive and smooth.

[0043] In another embodiment of the invention, the main hook body 41, pressure plate 42, and rotatable hook plate 43 of the hook assembly 4 can be made entirely of high-strength aluminum alloy or stainless steel and subjected to appropriate surface insulation treatment. This can further reduce the weight of the entire clamp, facilitate long-term operation at high altitudes, and improve overall corrosion resistance and insulation safety.

[0044] In another embodiment of the invention, the outer surface of the tubular housing 1 may be coated with a brightly colored coating, such as yellow or orange, and reflective strips may be provided on the surface. This helps to quickly identify and locate the wire clamp in complex environments or under poor lighting conditions, improving operational safety.

[0045] The working principle of the adaptive conductor diameter anti-detachment grounding clamp of the present invention is as follows: Pre-operation state (initial preparation state): Before any hooking operation, the entire device is in its initial state. At this time, the operator does not apply tension to the control cable. Under the action of the return spring of the pressure plate 42, the pressure plate 42 rotates upward around the first pivot 421, and its first clamping surface 423 moves away from the second clamping surface 433 of the rotatable hook plate 43, making the opening of the hook groove 411 completely open. At the same time, the rotatable hook plate 43, under the action of its positioning spring, remains in an outwardly open state, and the entrance of its guide groove 435 is directly opposite the outside of the opening of the hook groove 411, forming a wide guide channel. In the drive rod assembly 2, the recovery spring 24 is in a natural state or a slightly pre-compressed state, and the power spring 23 is also in a natural state or a slightly pre-compressed state. Under its own weight and the action of the spring, the top pressure block 5 is in the upper or middle position of its stroke, and its lower end face is in contact with the cam surface 424 of the pressure plate 42 but with relatively low pressure.

[0046] Working state (hooking and clamping process): The operator aligns the hook assembly 4 of the wire clamp with the overhead conductor using the insulated operating rod. Utilizing the flared guide structure and guide groove 435 of the rotatable hook plate 43, the conductor is easily guided into the hook groove 411 of the main hook body 41. After the conductor is in place, the operator pulls the control cable through the mechanism at the end of the insulated operating rod. The control cable pulls the guide rod 22 upward against the elastic force of the retraction spring 24. As the guide rod 22 moves upward, it causes the pressure block 5 at its lower end to move upward as well. The lower end face of the pressure block 5 disengages from the cam surface 424 of the pressure plate 42, or the pressure decreases significantly. At this time, the pressure plate 42 tends to rotate upward under the action of its return torsion spring. However, since the conductor has entered the hook groove 411 and is located below the pressure plate 42, the pressure plate 42 is blocked by the conductor and cannot fully return to its original position, remaining in a ready-to-trigger state. Once the wire is fully inserted into the hook groove 411 and abuts against the second clamping surface 433 of the rotatable hook plate 43, the operator releases the control cable. Under the restoring force of the recovery spring 24, the retaining ring 222 is pushed, causing the guide rod 22 and the top pressure block 5 to quickly return to their original position. The top pressure block 5 moves downward, and its lower end face presses against the cam surface 424 of the pressure plate 42 again. As the top pressure block 5 continues to move downward, its axial pressure is converted into a torque through the cam surface 424, driving the pressure plate 42 to rotate downward around the first pivot 421. The pressure plate 42 overcomes the spring force of its return torsion spring and rotates downward, with its first clamping surface 423 pressing against the wire located in the hook groove 411. At the same time, during the downward rotation of the root of the pressure plate body 42a, it contacts and pushes the inner end face of the rotatable hook plate 43, causing the rotatable hook plate 43 to overcome the spring force of its positioning spring and rotate inward, with its free end supporting the wire from below. At this point, the wire is clamped and fixed from three directions by the second clamping surface 433 of the rotatable hook plate 43, the first clamping surface 423 of the pressure plate 42, and the rotatable hook plate 43, forming a stable three-point clamping structure. At the end of the clamping action, the guide rod 22 continues to move downwards and begins to compress the power spring 23. The power spring 23 is compressed and stores energy; the resulting continuous downward elastic force is transmitted to the top pressure block 5 through the guide rod 22, causing the top pressure block 5 to maintain a constant pressure on the cam surface 424, thereby ensuring that the pressure plate 42 applies a continuous and stable clamping force to the wire. Due to the inclined self-locking effect formed by the cam surface 424 and the lower end surface of the top pressure block 5, and the continuous action of the power spring 23, this clamping state can be reliably maintained, achieving mechanical self-locking and preventing loosening.

[0047] Post-operation state (disassembly and release process): When it is necessary to disassemble the wire clamp, the operator pulls the control cable again. The control cable pulls the guide rod 22 upward. The upward movement of the guide rod 22 causes the top pressure block 5 to move upward, causing its lower end face to disengage from the tight contact with the cam surface 424 of the pressure plate 42, releasing the downward pressure on the pressure plate 42. At this time, under the elastic force of its return torsion spring, the pressure plate 42 quickly rotates upward around the first pivot 421, and its first clamping surface 423 leaves the wire surface, opening the clamping area. At the same time, the rotatable hook plate 43, under the action of its positioning spring, returns to its outward opening state, disengaging from the lifting of the wire. After the clamping force is completely released, the wire can be easily removed from the open hook groove 411. After releasing the control cable, under the action of the recovery spring 24, the guide rod 22 and the top pressure block 5 return to their initial positions, and the device returns to the pre-operation preparation state, waiting for the next splicing operation.

[0048] In summary, the adaptive conductor diameter anti-detachment grounding clamp of the present invention, through the integrated encapsulation of the internal drive mechanism in the tubular shell 1, combined with the dual-spring independent power system of the drive rod assembly 2, and the cooperative clamping structure of the pressure plate 42 and the rotatable hook plate 43 in the hook assembly 4, constructs a compact, reliable, and easy-to-operate mechanical system. The clear axial movement, rotational connection, and surface contact force transmission relationships between the components enable rapid clamping and unhooking of the conductor.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive wire gauge wire-to-ground clamp, comprising: include: Tubular shell (1); A drive rod assembly (2) is partially axially movable inside the tubular housing (1), and one end of which is connected to an external control cable; A hook assembly (4) is connected to the lower end of the tubular outer shell (1); the hook assembly (4) includes: The main hook body (41) has a hook groove (411) that opens to the side. A pressure plate (42) is rotatably connected to the main hook body (41) via a first pivot (421) and is located in the upper region of the hook groove (411); A rotatable hook plate (43) is rotatably connected to the main hook body (41) via a second pivot (431) and is located in the lower region of the hook groove (411); Top pressure block (5), which is connected to the other end of the drive rod assembly (2) and located inside the main hook body (41); The lower end of the top pressure block (5) is in contact with the pressure plate (42).

2. The self-adapting conductor size dehoming ground clamp of claim 1, wherein, The hook assembly (4) further includes a pressure plate clamp (44). The pressure plate (42) includes a pressure plate body (42a) and an annular portion (42b) located at its end. The annular portion (42b) includes two parallel and spaced annular clamps, forming a gap (42c) between the two annular clamps. The pressure plate clamp (44) is located in the gap (42c) and is rotatably connected by the first rotating shaft (421).

3. The adaptive conductor diameter anti-derailment grounding clamp according to claim 1, characterized in that, The free end of the rotatable hook plate (43) is provided with an axially extending guide groove (435).

4. The adaptive conductor diameter anti-derailment grounding clamp according to claim 1, characterized in that, The pressure plate (42) has a cam surface (424) on its pressure plate body (42a); the cam surface (424) is located at one end of the pressure plate body (42a) near the top pressure block (5); the lower end of the top pressure block (5) is in contact with the cam surface (424).

5. The adaptive conductor diameter anti-derailment grounding clamp according to claim 4, characterized in that, The cam surface (424) is a local surface on the pressure plate (42) that contacts the top pressure block (5).

6. The adaptive conductor diameter anti-derailment grounding clamp according to claim 1, characterized in that, The drive rod assembly (2) includes a guide rod (22), a lead sleeve (21) fixed inside the tubular housing (1), a power spring (23) sleeved on the guide rod (22), and a return spring (24); the guide rod (22) is axially movable through the lead sleeve (21); the power spring (23) is located inside the lead sleeve (21); the return spring (24) is located outside the lead sleeve (21), one end of the return spring (24) is in contact with the lead sleeve (21), and the other end is in contact with a retaining ring (222) fixed on the guide rod (22).

7. The adaptive conductor diameter anti-detachment grounding clamp according to claim 6, characterized in that, The tubular outer shell (1) includes an outer shell body (11), an upper end cap (12) and a lower end cap (13); the upper end cap (12) and the lower end cap (13) are respectively connected to the upper and lower ends of the outer shell body (11); the guide sleeve (21) is fixed to the upper end cap (12); the main hook body (41) is fixed to the lower end cap (13).

8. The adaptive conductor diameter anti-detachment grounding clamp according to claim 1, characterized in that, The inner surface of the pressure plate (42) is the first clamping surface (423), and the inner surface of the rotatable hook plate (43) is the second clamping surface (433). The first clamping surface (423) and the second clamping surface (433) are arranged opposite to each other.

9. The adaptive conductor diameter anti-derailment grounding clamp according to claim 1 or 3, characterized in that, The free end of the rotatable hook plate (43) bends and extends outward toward the opening of the hook groove (411).

10. The adaptive conductor diameter anti-derailment grounding clamp according to claim 1, characterized in that, It also includes an insulated operating rod connector, which is fixed to the top of the tubular housing (1).

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