An adjustable electrical power fitting clamp

Abstract

This invention discloses an adjustable power fitting clamp, belonging to the field of power fitting clamp technology. It includes a bracket, a locking block extending into a damping hole that slides within a rectangular groove, the locking block having an arc-shaped surface, and a piston block fixed to the locking block that slides within a circular groove. A resistance spring is fixed between the piston block and the circular groove. An exhaust hole is provided through the locking block and piston block, and a conical sleeve is installed within the exhaust hole. This invention allows for graded downward movement of the upper clamping seat. When clamping large-diameter cables, the eccentric wheel self-locks due to reaction force, automatically disconnecting the transmission between the rotating shaft and the sleeve, allowing continued driving of the remaining eccentric wheels to complete the clamping. This achieves precise clamping of cables of different diameters in a single operation, eliminating the need for individual cable adjustments and effectively solving the problem of traditional clamps being unable to adapt to multiple cable specifications. Simultaneously, the arc-shaped surface of the locking block reduces friction and prevents jamming, while the conical sleeve's air damping prevents repeated locking block insertion, reducing wear and rotational resistance, thus improving the overall smoothness of the mechanism's operation and its service life.

Description

Technical Field

[0001] This invention relates to the field of power fitting clamp technology, and more particularly to an adjustable power fitting clamp. Background Technology

[0002] In the wiring of power transmission systems and electrical equipment, power clamps are core components for fixing, connecting, and positioning cables. They are widely used in various power scenarios such as overhead transmission lines, electrical control cabinets, and power distribution equipment. Their performance directly affects the stability and safety of power transmission, as well as the convenience of construction and maintenance. With the rapid development of the power industry, scenarios involving the parallel laying of multiple cables are becoming increasingly common. Whether it is fixing multiple conductors in transmission lines or organizing multiple sets of cables inside electrical equipment, clamps are required to reliably clamp multiple cables simultaneously to prevent line faults caused by external disturbances, sagging due to their own weight, or poor contact, thus ensuring the normal operation of the power system.

[0003] Currently, existing power cable clamps capable of clamping multiple cables exist. They primarily achieve cable fixation through bolt tightening, wedge self-locking, and pre-twisted winding, providing a certain degree of clamping stability and meeting basic multi-cable fixing needs. However, these multi-cable clamps present significant operational inconveniences in practical use. Their core drawback lies in the fact that clamping and adjusting multiple cables requires individual operation. Workers must individually tighten and adjust the clamping structure (such as bolts, wedges, and pre-twisted wires) for each cable to achieve clamping fixation or tightness adjustment. This not only involves cumbersome and time-consuming steps, significantly reducing construction efficiency, especially in large-scale cable laying scenarios, but also, while some existing multi-cable clamps can clamp multiple cables simultaneously, they struggle to achieve synchronous and precise clamping of multiple cables of different diameters.

[0004] Therefore, this application proposes an adjustable power fitting clamp. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems by providing an adjustable power fitting clamp.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable power fitting clamp includes a bracket with multiple lower clamps on the bracket and multiple upper clamps above the lower clamps. It also includes a drive mechanism for moving the upper clamps downward to different degrees. The driving mechanism includes a rotating shaft with multiple independent sleeve groups fitted on it. Each sleeve group corresponds to one upper clamp. Each sleeve group includes two sleeves rotatably fitted on the rotating shaft. An eccentric wheel that drives the upper clamp to move is fixed between the two sleeves. Multiple damping holes are provided through the sleeves. The rotating shaft has a circular groove and a rectangular groove communicating with it. A locking block extending into the damping hole slides in the rectangular groove. The locking block has an arc-shaped surface. A piston block that slides in the circular groove is fixed on the locking block. A resistance spring is fixed between the piston block and the circular groove. An exhaust hole is provided through the locking block and the piston block. A conical sleeve is installed in the exhaust hole.

[0007] Preferably, the bracket includes a base plate for supporting the lower clamp, a top plate is provided above the base plate, and a plurality of connecting columns are provided between the base plate and the top plate, the connecting columns being connected to the base plate and the top plate by bolts.

[0008] Preferably, a mounting box is fixed to the bottom of the top plate, a bearing plate is fixed to the bottom of the mounting box, a guide groove is provided through the bottom of the bearing plate, and the upper clamp passes through the guide groove and is slidably connected to it.

[0009] Preferably, the rotating shaft passes through the mounting box and is rotatably connected to it. One end of the mounting box is provided with a transmission mechanism for driving the rotating shaft. The transmission mechanism includes a transmission box fixed on the mounting box. A short shaft is rotatably connected inside the transmission box. The short shaft is fixedly connected to the rotating shaft. A worm gear is mounted on the short shaft. A worm is rotatably connected inside the transmission box. The worm meshes with the worm gear. A drive shaft is fixed at the lower end of the worm. The drive shaft is located at the lower end of the transmission box.

[0010] Preferably, a reset plate is fixed on both sides of the upper clamp, a reset spring is fixed on the bottom of the reset plate, and the other end of the reset spring is connected to the bearing plate.

[0011] Preferably, a limiting block is fixedly connected to the upper end of the upper clamp, and a limiting groove is provided at the upper end of the limiting block, with the eccentric wheel located in the limiting groove.

[0012] Preferably, the tapered end of the tapered sleeve is positioned facing the outer surface of the rotating shaft, and the tapered sleeve is made of rubber and has elasticity.

[0013] Preferably, the damping holes are rectangular, and a plurality of the damping holes are arranged in a circumferential array on the sleeve.

[0014] Preferably, when the locking block is located inside the damping hole, the arc-shaped surface portion of the locking block is located inside the damping hole.

[0015] Preferably, the lower clamp and the upper clamp are provided with arc-shaped grooves on opposite sides, and protective pads are provided in the arc-shaped grooves.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: 1. The drive mechanism can drive the upper clamp to move down to different degrees. When a large-diameter cable is clamped in place, the corresponding eccentric wheel stops rotating due to the reaction force. The rotating shaft and the sleeve are automatically separated and the power transmission can continue to drive the other eccentric wheels to push the corresponding upper clamp down until all cables of different diameters are accurately clamped. There is no need to adjust the clamping structure of each cable one by one, which solves the problem that traditional wire clamps are difficult to adapt to multiple specifications of cables.

[0017] 2. Multiple cables can be clamped and fixed synchronously by rotating the drive shaft. When unlocking, rotating the drive shaft in the opposite direction will automatically reset the upper clamp with the help of the reset mechanism. No complicated tools are required throughout the process. The operation steps are simple. Compared with the traditional method of adjusting the clamps one by one, it saves a lot of operation time. It is especially suitable for large-scale cable laying, line maintenance and other scenarios, and significantly improves construction and maintenance efficiency.

[0018] 3. The arc-shaped surface design of the locking block reduces the frictional resistance with the inner wall of the damping hole, preventing jamming; the air damping effect of the tapered sleeve can prevent the locking block from repeatedly embedding into the damping hole, reducing the rotational resistance of the rotating shaft, and at the same time reducing the wear of the locking block and the damping hole; a deep groove ball bearing is used between the sleeve and the rotating shaft to reduce rotational friction and improve the smoothness of the mechanism operation.

[0019] 4. When the piston block moves into the circular groove, the air in the circular groove can be quickly discharged through the exhaust hole and the conical sleeve, avoiding air resistance from affecting the movement of the locking block; when the piston block moves out of the circular groove, the external air enters the circular groove through the exhaust hole and the conical sleeve. At this time, the air pressure will cause the conical sleeve to deform, which will dampen the air and prevent the piston block and the locking block from resetting, ensuring that the locking block will not be repeatedly embedded in the damping hole and ensuring the smooth operation of the mechanism.

[0020] In summary, this invention enables the upper clamp to move downwards in stages. When clamping large-diameter cables, the eccentric wheel is self-locked by the reaction force, and the rotation shaft and sleeve are automatically disconnected. This allows the remaining eccentric wheels to continue to be driven to complete the clamping, achieving simultaneous and precise clamping of cables of different diameters in one go without the need for individual adjustments. This effectively solves the problem that traditional cable clamps are difficult to adapt to multiple cable specifications. At the same time, the arc-shaped surface of the locking block reduces friction and avoids jamming, while the conical sleeve's air damping prevents the locking block from repeatedly embedding, reducing wear and rotational resistance, thus improving the overall smoothness of the mechanism's operation and its service life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an adjustable power fitting clamp proposed in this invention; Figure 2 This is a front view of an adjustable power fitting clamp proposed in this invention. Figure 3This is a side view of an adjustable power fitting clamp proposed in this invention; Figure 4 This is a schematic diagram of the internal structure of the mounting box in an adjustable power fitting clamp proposed in this invention. Figure 5 This is a schematic diagram of the eccentric wheel in an adjustable power fitting clamp proposed in this invention. Figure 6 This is a schematic diagram of the locking block in an adjustable power fitting clamp according to the present invention. Figure 7 This is a schematic diagram of the circular groove in an adjustable power fitting clamp according to the present invention. Figure 8 This is a schematic diagram of the worm gear in an adjustable power fitting clamp proposed in this invention; Figure 9 This is a schematic diagram of the conical sleeve in an adjustable power fitting clamp proposed in this invention.

[0022] In the diagram: 1. Base plate, 2. Connecting column, 3. Top plate, 4. Lower end clamp, 5. Upper end clamp, 6. Rotating shaft, 7. Eccentric wheel, 8. Mounting box, 9. Bearing plate, 10. Transmission box, 11. Drive shaft, 12. Limiting block, 13. Limiting groove, 14. Sleeve, 15. Reset plate, 16. Reset spring, 17. Damping hole, 18. Guide groove, 19. Locking block, 20. Arc surface, 21. Exhaust hole, 22. Rectangular groove, 23. Circular groove, 24. Resistance spring, 25. Piston block, 26. Worm gear, 27. Worm, 28. Conical sleeve, 29. Short shaft. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Reference Figures 1-9 An adjustable power clamp includes a bracket, which serves as the load-bearing foundation for the entire clamp, used to install and fix the lower clamp seat and other related components, ensuring the stability of the overall clamp structure. The bracket includes a base plate 1 for supporting the lower clamp seat 4. The base plate 1 is made of high-strength steel, possessing good load-bearing capacity and corrosion resistance, and can adapt to complex outdoor working environments. A top plate 3 is arranged parallel above the base plate 1, and the top plate 3 is sized to match the base plate 1, used to install the drive mechanism and related auxiliary components. Multiple connecting posts 2 are evenly arranged between the base plate 1 and the top plate 3. The connecting posts 2 are made of stainless steel, and their two ends are firmly connected to the base plate 1 and the top plate 3 by high-strength bolts. The bolt connection method facilitates later disassembly, maintenance and repair, while ensuring the connection strength between the base plate 1 and the top plate 3, preventing deformation of the bracket due to long-term stress.

[0025] To facilitate the installation and fixation of the bracket in practical applications and meet the needs of different installation scenarios, multiple fixing holes can be set through the base plate 1. The fixing holes are evenly distributed on the edge of the base plate 1. The base plate 1 can be firmly installed on the corresponding frame by means of expansion bolts and other connecting parts. If the installation scenario is not suitable for setting fixing holes, an integrated molded mounting bracket can be set at the end of the base plate 1. The mounting bracket has reserved mounting holes. The mounting bracket is connected to the frame by bolts, which can also achieve stable installation of the base plate 1, ensuring that the cable clamp will not be displaced during operation and ensuring the stability of cable clamping.

[0026] The clamping assembly, used to directly contact and clamp the cable, mainly consists of a lower clamp 4 and an upper clamp 5, which are arranged in a one-to-one correspondence to ensure uniform clamping of the cable. The lower clamp 4 is fixedly installed on the upper surface of the base plate 1, and multiple lower clamps 4 are evenly distributed along the length of the base plate 1, allowing for the simultaneous clamping and fixing of multiple cables, thus improving work efficiency. Above the lower clamps 4, multiple upper clamps 5 are correspondingly provided, and each has an arc-shaped groove on its opposite side. The curvature of the arc-shaped groove is adapted to the outer diameter of common cables, increasing the contact area with the cable surface and preventing excessive local pressure that could damage the cable surface.

[0027] To further enhance cable protection, protective pads are installed in the arc-shaped grooves of both the lower clamp 4 and the upper clamp 5. These pads are made of aging-resistant, highly elastic rubber with uniform thickness, a smooth surface, and a certain degree of friction. The rubber protective pads not only cushion the clamped cable, mitigating the impact during clamping and preventing damage to the cable surface, but also increase the friction between the cable and the clamp, preventing slippage and further improving clamping stability. Simultaneously, the rubber material possesses excellent insulation properties, effectively preventing conductive contact between the clamp and the cable, ensuring the safety of power transmission.

[0028] To accommodate cables of different diameters, the clamp also includes a drive mechanism. The core function of the drive mechanism is to drive the upper clamp 5 to move downwards to different degrees. By adjusting the distance between the upper clamp 5 and the lower clamp 4, it adapts to the clamping requirements of cables of different diameters. Its specific structure and working principle are as follows: The drive mechanism includes a rotating shaft 6, which is made of high-strength alloy steel, possessing good rigidity and wear resistance, capable of withstanding large rotational torque, and ensuring stability during long-term use. Multiple independent sleeve assemblies (as shown in the attached diagram) are fitted onto the rotating shaft 6. Figure 4As shown), each set of sleeves corresponds one-to-one with each upper clamp 5; each set of sleeves includes two rotatable sleeves 14, which are symmetrically arranged on both sides of the eccentric wheel 7. The sleeves 14 are rotatably mounted on the rotating shaft 6 through deep groove ball bearings. The deep groove ball bearings have the characteristics of low friction coefficient and flexible rotation, which can effectively reduce the frictional resistance between the sleeves 14 and the rotating shaft 6, ensure that the sleeves 14 can rotate smoothly around the rotating shaft 6, and at the same time improve the service life of the mechanism.

[0029] An eccentric wheel 7 is fixed between the two sleeves 14 to drive the upper clamp 5 to move downwards. The eccentric wheel 7 adopts an integrated molding structure, and its material is the same as that of the rotating shaft 6 to ensure structural strength. A through hole coaxial with the sleeve 14 is provided on the eccentric wheel 7, and the rotating shaft 6 passes through the through hole. The eccentric wheel 7 is welded and fixed to the end faces of the two sleeves 14, so that the eccentric wheel 7 can rotate synchronously with the sleeves 14 without affecting the rotation of the rotating shaft 6 itself. The eccentric design of the eccentric wheel 7 is the core of realizing the downward movement of the upper clamp 5. When the eccentric wheel 7 rotates, its eccentric part will press down on the upper clamp 5, pushing the upper clamp 5 to move downwards in a set direction, thereby adjusting the distance between it and the lower clamp 4, and realizing the clamping of the cable.

[0030] To achieve power transmission between the rotating shaft 6 and the sleeve 14, multiple damping holes 17 are provided through the sleeve 14. The damping holes 17 are rectangular holes, and the multiple damping holes 17 are evenly distributed in a circular array on the circumferential surface of the sleeve 14, with equal included angles between two adjacent damping holes 17. The size of the damping holes 17 is adapted to the locking block 19 that is subsequently installed. By locking the block 19 into the damping hole 17, synchronous rotation between the rotating shaft 6 and the sleeve 14 can be achieved, thereby driving the eccentric wheel 7 to rotate and completing the drive of the upper clamp 5.

[0031] To ensure that the eccentric wheel 7 can stably drive the upper clamp 5 downward and prevent the eccentric wheel 7 from deviating during rotation, thus affecting the stable transmission of driving force, a limiting block 12 is fixedly connected to the upper end of the upper clamp 5. The limiting block 12 and the upper clamp 5 are fixed by welding, ensuring a firm connection and preventing it from falling off. The upper end of the limiting block 12 has a limiting groove 13 that matches the shape of the eccentric wheel 7. The eccentric wheel 7 is embedded in the limiting groove 13, which can limit the eccentric wheel 7 and effectively prevent it from deviating left or right or moving up or down during rotation. This ensures that the rotational force of the eccentric wheel 7 can be stably transmitted to the upper clamp 5, achieving a smooth downward movement of the upper clamp 5.

[0032] To achieve power transmission and separation between the rotating shaft 6 and the sleeve 14, a circular groove 23 and a rectangular groove 22 communicating with it are provided on the rotating shaft 6. The rectangular groove 22 is provided through the outer wall of the rotating shaft 6, so that the rectangular groove 22 is connected to the outside of the rotating shaft 6. A locking block 19 is slidably connected in the rectangular groove 22. The size of the locking block 19 is adapted to the rectangular groove 22, and it can slide freely in the rectangular groove 22. The locking block 19 can extend into the damping hole 17 of the sleeve 14 to realize the linkage between the rotating shaft 6 and the sleeve 14. The locking block 19 has an arc-shaped surface 20, and the other side away from the arc-shaped surface 20 is a flat end, which slides in fit with the inner wall of the rectangular groove 22. The curvature of the arc-shaped surface 20 is adapted to the curvature of the inner wall of the sleeve 14. When the locking block 19 is located in the damping hole 17, part of its arc-shaped surface 20 is located in the damping hole 17. This structural design can adapt to the relative movement requirements between the sleeve 14 and the rotating shaft 6, reduce the frictional resistance between the locking block 19 and the inner wall of the damping hole 17, and avoid jamming between the two.

[0033] To ensure stable installation and operation of the drive mechanism, a mounting box 8 is fixed to the bottom of the top plate 3. The mounting box 8 adopts a sealed structure, welded from steel plates, and has good protective performance, effectively preventing dust, rainwater, and other impurities from entering the box and avoiding corrosion or damage to internal components. A bearing plate 9 is fixed to the bottom of the mounting box 8, and the bearing plate 9 is bolted to the mounting box 8 for easy disassembly and maintenance. A guide groove 18 is provided through the bottom of the bearing plate 9. The size of the guide groove 18 is adapted to the upper clamp 5. The upper clamp 5 passes through the guide groove 18 and is slidably connected to it. The guide groove 18 can guide and limit the up and down movement of the upper clamp 5, ensuring that the upper clamp 5 can only move up and down along the direction of the guide groove 18, preventing it from deviating during movement and ensuring clamping alignment accuracy.

[0034] The rotating shaft 6 passes through and is rotatably connected to the mounting box 8. A sealed bearing is provided at the connection between the rotating shaft 6 and the mounting box 8. The sealed bearing not only ensures the smooth rotation of the rotating shaft 6, but also provides a seal to prevent lubricating oil leakage from the box and the entry of external impurities. One end of the mounting box 8 is equipped with a transmission mechanism for driving the rotating shaft 6. The transmission mechanism adopts a worm gear transmission structure, which has the characteristics of large transmission ratio and good self-locking performance. It can effectively reduce the operating force of the operator, and at the same time ensure that the rotating shaft 6 will not rotate on its own after it stops rotating, thus improving the stability of clamping.

[0035] The transmission mechanism specifically includes a transmission box 10 fixed on a mounting box 8. The transmission box 10 and the mounting box 8 are integrally formed, resulting in a robust structure that provides a stable mounting base for the internal transmission components. A short shaft 29 is rotatably connected inside the transmission box 10. The short shaft 29 is connected to the inner wall of the transmission box 10 via bearings, ensuring smooth rotation of the short shaft 29. One end of the short shaft 29 is fixedly connected to the rotating shaft 6 using a key connection to ensure stable power transmission and prevent relative rotation between the short shaft 29 and the rotating shaft 6. A worm gear 26 is fixedly mounted on the short shaft 29, and the worm gear 26 and the short shaft 29 are interference-fitted, ensuring a tight connection and preventing loosening. A worm 27 is also rotatably connected inside the transmission box 10, meshing with the worm gear 26. Both ends of the worm 27 are connected to the inner wall of the transmission box 10 via bearings. The meshing precision between the worm 27 and the worm gear 26 is high, resulting in smooth transmission and low noise. The lower end of the worm gear 27 is fixed with a drive shaft 11, which extends to the lower end of the transmission box 10. The end of the drive shaft 11 is provided with a hexagonal interface, which makes it easy for operators to drive it to rotate using tools such as wrenches, making operation convenient.

[0036] To facilitate the automatic reset of the upper clamp 5 and subsequent cable disassembly or adjustment, the clamp is equipped with a reset mechanism. Reset plates 15 are fixed to both sides of the upper clamp 5, and the reset plates 15 are welded to the upper clamp 5 for a secure connection. A reset spring 16 is fixed to the bottom of the reset plate 15. The reset spring 16 is a high-strength compression spring with excellent elastic reset performance. The other end of the reset spring 16 is fixedly connected to the bearing plate 9. When the reset spring 16 is in its natural state, the upper clamp 5 is at its highest position, maintaining the maximum distance between it and the lower clamp 4, facilitating cable insertion. When the drive mechanism releases the downward pressure on the upper clamp 5, the reset spring 16, under the action of elastic reset force, will drive the reset plate 15 and the upper clamp 5 upwards to reset to their initial positions, providing convenience for the next cable clamping or the disassembly and adjustment of existing cables.

[0037] To ensure smooth movement of the locking block 19 and smooth power transmission and separation between the rotating shaft 6 and the sleeve 14, a piston block 25 is fixed to the locking block 19 and slidably connected within the circular groove 23. The piston block 25 fits tightly against the inner wall of the circular groove 23, allowing it to slide freely within the groove and providing good sealing performance. A resistance spring 24 is fixed between the piston block 25 and the inner wall of the circular groove 23. The resistance spring 24 is a support spring with a moderate elastic coefficient, providing stable elastic support force for the locking block 19, preventing it from easily dislodging from the damping hole 17, and enabling the linkage between the rotating shaft 6 and the sleeve 14.

[0038] It is worth noting that during the cable clamping process, the arc-shaped surface 20 abuts against the side wall of the damping hole 17, causing the sleeve 14 to rotate together. At this time, the resistance spring 24 mainly prevents the locking block 19 from retracting. That is, the elastic coefficient of the resistance spring 24 determines the final clamping force on the cable. As the rotation process continues, the clamping force on the cable increases continuously. When the elastic force of the resistance spring 24 is insufficient to prevent the locking block 19 from retracting, the preset clamping force on the cable is achieved.

[0039] An exhaust hole 21 is provided through the locking block 19 and the piston block 25. The axis of the exhaust hole 21 is parallel to the axis of the circular groove 23, which is used to allow air circulation between the inside and outside of the circular groove 23. A conical sleeve 28 is installed inside the exhaust hole 21. The conical end of the conical sleeve 28 is set towards the outer surface of the rotating shaft 6. The conical sleeve 28 is made of aging-resistant and elastic rubber material and has a certain deformation capacity. The design of the conical sleeve 28 enables rapid air discharge and air damping. When the piston block 25 moves into the circular groove 23, the air in the circular groove 23 can be quickly discharged through the exhaust hole 21 and the conical sleeve 28, avoiding air resistance from affecting the movement of the locking block 19. When the piston block 25 moves out of the circular groove 23, external air enters the circular groove 23 through the exhaust hole 21 and the conical sleeve 28. At this time, the air pressure will cause the conical sleeve 28 to deform, forming a damping effect on the air and hindering the reset of the piston block 25 and the locking block 19, ensuring that the locking block 19 will not be repeatedly embedded in the damping hole 17, and ensuring the smooth operation of the mechanism.

[0040] The specific usage process and working principle of this invention are as follows: When clamping and installing cables, firstly, the cable is passed through the gap between the lower clamp 4 and the upper clamp 5, ensuring that the cable is placed in the arc-shaped groove of the lower clamp 4 and centered to prevent cable misalignment during clamping. Subsequently, the operator can use a wrench to engage the hexagonal interface of the drive shaft 11 to drive the drive shaft 11 to rotate. The drive shaft 11 drives the worm gear 27, which is fixedly connected to it, to rotate synchronously. Since the worm gear 27 is meshed with the worm wheel 26, the rotation of the worm gear 27 will drive the worm wheel 26 to rotate, which in turn drives the short shaft 29, which is fixedly connected to the worm wheel 26, to rotate. The short shaft 29 drives the rotating shaft 6 to rotate synchronously through a key connection.

[0041] When the rotating shaft 6 rotates, it will drive the locking block 19 inside it to rotate together. At this time, under the elastic force of the resistance spring 24, the locking block 19 extends into the damping hole 17 of the sleeve 14. The flat end of the locking block 19 abuts against the radial inner wall of the damping hole 17. Since the contact surface between the flat end and the inner wall of the damping hole is basically perpendicular to the sliding direction of the locking block 19, the driving force of the rotating shaft 6 is transmitted along the normal direction of the radial inner wall of the damping hole, and no radial component force pointing into the circular groove 23 is generated. The rotational force of the rotating shaft 6 is reliably transmitted to the sleeve 14 through the locking block 19, thereby driving the sleeve 14 and the eccentric wheel 7 fixedly connected to it to rotate synchronously. During rotation, the eccentric part of the eccentric wheel 7 presses downward against the limiting block 12. The limiting block 12 transmits the pressing force to the upper clamp 5, pushing the upper clamp 5 to move smoothly downward along the guide groove 18 of the bearing plate 9. As the upper clamp 5 moves downward, the distance between it and the lower clamp 4 gradually decreases, eventually cooperating with the lower clamp 4 to clamp and fix the cable. During the clamping process, the rubber protective pad in the arc groove is in close contact with the cable surface, playing a buffering and protective role to prevent the cable surface from being pinched and damaged.

[0042] In actual power transmission scenarios, cables vary in diameter, requiring different clamping distances. Therefore, the downward movement distance of the upper clamp 5 also varies. When an upper clamp 5 moves down to engage with the lower clamp 4 and precisely clamps a large-diameter cable, it becomes blocked by the cable and cannot move further. At this point, the operator needs to continue driving the drive shaft 11 to rotate, causing the rotating shaft 6 to rotate continuously, which in turn drives the other unclamped eccentric wheels 7 to rotate continuously, pushing the corresponding upper clamp 5 downwards until all upper clamps 5 have clamped their respective cables. It should be noted that the maximum downward movement distance of the upper clamp 5 driven by the eccentric wheels 7 is precisely designed to meet the clamping requirements of the smallest cable within a set range, ensuring that all cable specifications can be stably clamped.

[0043] As the rotating shaft 6 continues to rotate, the eccentric wheel 7 corresponding to the upper clamp 5, which is already holding a large-diameter cable and cannot move further down, will be subjected to the reaction force of the limiting block 12. Since the upper clamp 5 cannot move down, the limiting block 12 also cannot move further down, thus causing the eccentric wheel 7 to stop rotating. As the rotating shaft 6 continues to rotate, the arc-shaped surface 20 on the locking block 19 will come into contact with the inner wall of the damping hole 17. Under the rotational pressure of the rotating shaft 6, the locking block 19 will be pushed into the circular groove 23, thereby driving the piston block 25 to move into the circular groove 23. At this time, the resistance spring 24 is compressed, storing elastic potential energy.

[0044] As the piston block 25 moves into the circular groove 23, it compresses the air inside the groove, increasing the air pressure. The high-pressure air is then quickly discharged through the exhaust port 21 and the conical sleeve 28. Since the conical end of the conical sleeve 28 faces the outer surface of the rotating shaft 6, and its taper direction is consistent with the air discharge direction, it does not obstruct air discharge, enabling rapid air discharge and preventing air resistance from affecting the movement of the locking block 19, thus ensuring that the locking block 19 can move smoothly into the circular groove 23.

[0045] When the locking block 19 is fully retracted into the rectangular groove 22, the locking block 19 is completely separated from the damping hole 17. At this time, the rotating shaft 6 and the sleeve 14 no longer transmit power, and they rotate relative to each other. The eccentric wheel 7 corresponding to the upper clamp 5 that cannot move down stops rotating and no longer applies downward pressure to the upper clamp 5, ensuring that the cable is not damaged by over-clamping. When the rotating shaft 6 rotates to the point where the locking block 19 is again aligned with the damping hole 17 at another position on the sleeve 14, the piston block 25 and the locking block 19 will be pushed outward by the elastic reset action of the resistance spring 24. At this time, external air enters the circular groove 23 through the exhaust hole 21 and the conical sleeve 28.

[0046] Since the air flows in the opposite direction of the taper of the conical sleeve 28, the air pressure causes the conical sleeve 28 to deform. The inner walls of the conical sleeve 28 will come closer together, creating a certain damping effect on the air. This, in turn, hinders the reset speed of the piston block 25 and the locking block 19, preventing the locking block 19 from repeatedly embedding into the damping hole 17 during the reset process. This design effectively reduces the resistance when the rotating shaft 6 rotates, reduces the operating effort of the operator, and provides convenience for the operator. At the same time, it also reduces the wear between the locking block 19 and the damping hole 17, and improves the service life of the mechanism.

[0047] After all the upper clamps 5 have completed cable clamping, the operator stops driving the drive shaft 11, and the cable clamping installation is complete. At this time, external air will slowly enter the circular groove 23 through the exhaust hole 21 and the conical sleeve 28. The air pressure in the circular groove 23 gradually returns to atmospheric pressure. Under the elastic reset action of the resistance spring 24, the piston block 25 and the locking block 19 slowly reset. The locking block 19 re-engages into the corresponding damping hole 17 on the sleeve 14, completing the locking of the eccentric wheel 7 and ensuring that the eccentric wheel 7 will not rotate on its own, thereby ensuring the stability of the clamping distance between the upper clamp 5 and the lower clamp 4.

[0048] Meanwhile, since the transmission mechanism adopts the meshing structure of worm gear 26 and worm 27, the worm gear transmission has good self-locking characteristics. That is, the worm 27 can drive the worm gear 26 to rotate, but the worm gear 26 cannot drive the worm 27 to rotate. This characteristic can effectively prevent the rotating shaft 6 from rotating on its own, further ensuring the clamping stability of the cable, avoiding the cable from loosening due to vibration and other factors during long-term use, and ensuring the safety and stability of power transmission.

[0049] When it is necessary to unlock the cable clamp for cable disassembly or adjustment, the operator only needs to reverse the drive shaft 11. The drive shaft 11 drives the worm 27 to rotate in the opposite direction. The worm 27, through its meshing with the worm wheel 26, drives the short shaft 29 and the rotating shaft 6 to rotate in the opposite direction. At this time, the flat end of the locking block 19 abuts against the inner wall of the damping hole 17 without radial force. Due to the change in the direction of the force during reverse rotation, the locking block 19 can effectively drive the sleeve 14 and the eccentric wheel 7 to rotate in the opposite direction. The eccentric part of the eccentric wheel 7 gradually disengages from the pressure on the limiting block 12, releasing the downward pressure on the upper clamp 5.

[0050] Under the elastic reset action of the return spring 16, the reset plate 15 drives the upper clamp 5 to reset upward, gradually disengaging from the cable and releasing the clamp on the cable. Workers can then easily remove the cable from between the lower clamp 4 and the upper clamp 5, completing the cable disassembly or adjustment. The entire unlocking process is convenient and requires no complex tools, effectively improving the efficiency of power line maintenance.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An adjustable power fitting clamp, comprising a bracket, a plurality of lower end clamping seats (4) are arranged on the bracket, a plurality of upper end clamping seats (5) matched with the lower end clamping seats (4) are arranged above the lower end clamping seats (4), characterized in that, It also includes a drive mechanism, which is used to drive each upper clamp (5) to move downward independently to different degrees; The driving mechanism includes a rotating shaft (6), on which multiple independent sets of sleeves are fitted, each set of sleeves corresponding to each upper clamp (5); each set of sleeves includes two sleeves (14) rotatably fitted on the rotating shaft (6), and an eccentric wheel (7) for driving the upper clamp (5) to move is fixed between the two sleeves (14). Multiple damping holes (17) are provided through the sleeves (14), and the rotating shaft (6) is provided with a circular groove (23) and a groove communicating with it. A rectangular groove (22) is provided, and a locking block (19) extending into a damping hole (17) slides in the rectangular groove (22). An arc-shaped surface (20) is provided on the locking block (19). A piston block (25) sliding in a circular groove (23) is fixed on the locking block (19). A resistance spring (24) is fixed between the piston block (25) and the circular groove (23). An exhaust hole (21) is provided through the locking block (19) and the piston block (25). A conical sleeve (28) is installed in the exhaust hole (21).

2. An adjustable electrical hardware clamp according to claim 1, wherein, The bracket includes a base plate (1) for supporting the lower end clamp (4), a top plate (3) is provided above the base plate (1), and a plurality of connecting columns (2) are provided between the base plate (1) and the top plate (3). The connecting columns (2) are connected to the base plate (1) and the top plate (3) by bolts.

3. An adjustable electrical hardware clamp according to claim 2, wherein, The bottom of the top plate (3) is fixed with an installation box (8), the bottom of the installation box (8) is fixed with a bearing plate (9), the bottom of the bearing plate (9) is provided with a guide groove (18), and the upper clamp (5) passes through the guide groove (18) and is slidably connected to it.

4. An adjustable electrical hardware clamp according to claim 3, wherein, The rotating shaft (6) passes through the mounting box (8) and is rotatably connected to it. One end of the mounting box (8) is provided with a transmission mechanism for driving the rotating shaft (6). The transmission mechanism includes a transmission box (10) fixed on the mounting box (8). A short shaft (29) is rotatably connected inside the transmission box (10). The short shaft (29) is fixedly connected to the rotating shaft (6). A worm gear (26) is installed on the short shaft (29). A worm (27) is rotatably connected inside the transmission box (10). The worm (27) is meshed with the worm gear (26). A drive shaft (11) is fixed at the lower end of the worm (27). The drive shaft (11) is located at the lower end of the transmission box (10).

5. An adjustable electrical hardware clamp according to claim 3, wherein, Both sides of the upper clamp (5) are fixed with reset plates (15), and the bottom of the reset plate (15) is fixed with a reset spring (16). The other end of the reset spring (16) is connected to the bearing plate (9).

6. An adjustable electrical hardware clamp according to claim 1, wherein, The upper end of the upper clamp (5) is fixedly connected to a limiting block (12), and the upper end of the limiting block (12) is provided with a limiting groove (13), and the eccentric wheel (7) is located in the limiting groove (13).

7. An adjustable electrical hardware clamp according to claim 1, wherein, The tapered end of the tapered sleeve (28) is positioned facing the outer surface of the rotating shaft (6), and the tapered sleeve (28) is made of rubber and is elastic.

8. An adjustable electrical hardware clamp according to claim 1, wherein, The damping hole (17) is rectangular, and multiple damping holes (17) are arranged in a circular array on the sleeve (14).

9. An adjustable electrical hardware clamp according to claim 1, wherein, When the locking block (19) is located inside the damping hole (17), the arc-shaped surface (20) on the locking block (19) is partially located inside the damping hole (17).

10. The adjustable electrical hardware clamp of claim 1, wherein, The lower clamp (4) and the upper clamp (5) are both provided with arc-shaped grooves on their opposite sides, and protective pads are provided in the arc-shaped grooves.

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