Adjustable composite cross arm

Abstract

This invention relates to the technical field of power fittings, and in particular to an adjustable composite crossarm, comprising a clamp assembly, two telescopic rods, and two crossarm arms; it also includes two mounting plates, multiple sliders, multiple wire clamping assemblies, guide grooves, multiple countersunk holes, and multiple bolts. The two mounting plates are mounted on the clamp assembly. The two ends of the two telescopic rods are respectively connected to one end of the two mounting plates and the middle of the two crossarm arms. The inner ends of the two crossarm arms are respectively hinged to the two mounting plates. The multiple sliders are slidably mounted in the mounting grooves of the two crossarm arms, and each slider is equipped with a wire clamping assembly. Guide grooves communicating with the mounting grooves are provided on both side walls of the two crossarm arms. Multiple countersunk holes are evenly provided on both side walls of the two crossarm arms. The multiple bolts pass through the guide grooves and are rotatably screwed to the multiple sliders. The nuts of the bolts are smaller than the countersunk holes. This design can adjust the spacing of multiple cables, avoiding the accident of insulation failure caused by multiple cables being too close together on the crossarm, thus ensuring good safety.

Description

Technical Field

[0001] This invention relates to the technical field of power fittings, and in particular to an adjustable composite crossarm. Background Technology

[0002] A crossarm is an angle iron component horizontally fixed at the top of a power pole or concrete utility pole, and is an indispensable piece of equipment in power grid construction. Various crossarms are disclosed in the prior art. For example, Chinese invention patent CN114961402B proposes an adjustable crossarm for power steel pipe towers. This adjustable crossarm can adjust its horizontal length and vertical tilt angle, allowing for a larger adjustable range for cable fixing on the steel pipe tower. It solves the problem that existing crossarms are non-adjustable rigid structures, and the cable fixing position is not adjustable after the crossarm is fixed to the steel pipe tower. This makes cable installation more flexible, easier to operate, and reduces the labor intensity of workers.

[0003] However, the existing adjustable crossarm mounting frame is a fixed structure, so it cannot adjust the spacing between multiple cables on the crossarm. This causes the cables to be too close together when they turn corners on the crossarm, which can easily lead to insulation failure accidents. Therefore, it needs to be improved. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides an adjustable composite crossarm that can adjust the spacing of multiple cables, avoids multiple cables being too close together on the crossarm, and prevents insulation failure accidents, thus providing good safety.

[0005] An adjustable composite crossarm of the present invention includes a clamp assembly, two telescopic rods, and two crossarm arms. The clamp assembly clamps the rods, and the outer ends of the two telescopic rods are respectively hinged to the middle of the two crossarm arms. It also includes two mounting plates, multiple sliders, multiple wire clamping assemblies, guide grooves, multiple countersunk holes, and multiple bolts. The two mounting plates are vertically mounted on the outer walls of both sides of the clamp assembly. The inner ends of the two telescopic rods are respectively hinged to one end of the two mounting plates, and the inner ends of the two crossarm arms are respectively hinged to the other ends of the two mounting plates. Mounting grooves are provided on the end faces of the two crossarms facing away from the telescopic rods. Multiple sliders are slidably mounted in the mounting grooves of the two crossarms, and wire clamping assemblies are mounted on each slider. Guide grooves communicating with the mounting grooves are provided on both side walls of the two crossarms. Multiple countersunk holes are evenly provided on both side walls of the two crossarms, the diameter of which is larger than the width of the guide grooves, and the centers of the multiple countersunk holes are located at... On the centerline of multiple guide slots, multiple bolts pass through the guide slots and are rotatably screwed to multiple sliders. The diameter of the bolt nut is slightly smaller than the diameter of the countersunk hole. During installation, the clamp assembly is fitted onto the designated height of the pole. The pitch angle of the two crossarms is adjusted by adjusting the length of the two telescopic rods. The position of the multiple sliders is adjusted along the mounting grooves of the two crossarms, thereby adjusting the distance between the multiple clamping assemblies. This causes the multiple sliders to move the multiple bolts along the guide slots. After the multiple sliders are adjusted to their positions, the multiple bolts are rotated and tightened, causing the bolt nuts to sink into the corresponding countersunk holes. The countersunk holes and the bolt nuts work together to position and lock the multiple sliders. The multiple clamping assemblies are used to clamp the cables, thereby adjusting the spacing between the multiple cables to accommodate cable bends and other positions. This prevents multiple cables from being too close together on the crossarm, which could lead to insulation failure and ensures good safety.

[0006] Preferably, the assembly also includes two rotating shafts and multiple bolts. A rotating shaft is installed in the center of each of the two mounting plates. The two rotating shafts are rotatably connected to the side walls of the clamp assembly. Multiple threaded holes are provided on the outer side walls of the clamp assembly. Multiple bolts pass through the through holes of the two mounting plates and are rotatably screwed into the multiple threaded holes of the clamp assembly. The two mounting plates can rotate around the two rotating shafts, thereby adjusting the orientation of the multiple cable clamping assemblies on the crossarm. The two mounting plates are fixed to the clamp assembly by the multiple bolts. When the crossarm is in the upper position, the multiple cable clamping assemblies support multiple cables; when the crossarm is in the lower position, the multiple cable clamping assemblies suspend multiple cables, thus achieving different cable installation processes.

[0007] Preferably, it also includes arc-shaped clamping plates. Arc-shaped clamping plates are installed on the upper and lower parts of the two mounting plates facing the end face of the clamp assembly. The ends of the arc-shaped clamping plates are provided with protrusions. Arc-shaped grooves matching the arc-shaped clamping plates are provided on both outer walls of the clamp assembly. The mounting plates cooperate with the arc-shaped grooves of the clamp assembly through the arc-shaped clamping plates. The arc-shaped clamping plates are hooked and connected to the arc-shaped grooves of the clamp assembly, which improves the connection reliability between the two mounting plates and the clamp assembly.

[0008] Preferably, the telescopic rod includes a threaded sleeve, a first screw, and a second screw. The inner wall of the threaded sleeve has positive and negative threads at both ends. One end of the first screw is hinged to a mounting plate, and the other end of the first screw is rotatably screwed to the inner end of the threaded sleeve. One end of the second screw is hinged to the middle of the crossarm, and the other end of the second screw is rotatably screwed to the outer end of the threaded sleeve. The threaded sleeve has a locking structure for locking the first and second screws. Rotating the threaded sleeve allows the positive and negative threads to engage with the first and second screws, thereby adjusting the length of the telescopic rod and consequently the pitch angle of the crossarm. After the angle adjustment is completed, the locking structure locks the rod, improving reliability.

[0009] Preferably, the locking structure consists of openings and soft metal blocks on the sidewalls at both ends of the threaded sleeve, with multiple soft metal blocks embedded in the openings respectively. After the lengths of the threaded sleeve, screw one, and screw two are adjusted, tools such as hydraulic pliers are used to press and deform the multiple soft metal blocks inward, so that the multiple soft metal blocks fill the gaps between the threads of the threaded sleeve, screw one, and screw two, thereby locking the threaded sleeve, screw one, and screw two. The operation is simple and the locking is reliable.

[0010] Preferably, the cable clamping assembly includes two shafts, two ceramic cams, and a plug. The two shafts are rotatably mounted on the slider. Two ceramic cams are respectively installed in the middle of the two shafts. The two ceramic cams are eccentric to the two shafts. The sidewalls of the protrusions of the two ceramic cams are provided with slots matching the cable diameter. The upper ends of the two shafts are provided with horizontal pin holes. The plug passes through the two pin holes to fix the two shafts. When clamping the cable, the two shafts are rotated so that the protrusions of the two ceramic cams face the outside of the slider. The cable is placed between the two ceramic cams. The two shafts are then rotated so that the protrusions of the two ceramic cams face the inside of the slider, so that the slots of the two ceramic cams clamp the two sides of the cable. The plug passes through the two pin holes to lock the two shafts, completing the cable installation. The operation is simple, the cable clamping is reliable, and there is no need to wind the cable.

[0011] Preferably, the insertion rod includes a male screw and a female screw. The male screw is movably inserted into the pin hole of one shaft, and the female screw is movably inserted into the pin hole of another shaft. The male screw and the female screw are rotatably screwed together. By turning the male screw and the female screw to rotate the two shafts respectively, it is easier to reduce the effort required and allows the two ceramic cams to apply greater pressure to the cable. After the two ceramic cams clamp the cable, the ends of the male screw and the female screw are brought close together and screwed together, thereby locking the two shafts and the two ceramic cams, making the locking more reliable and stable.

[0012] Preferably, the clamp assembly includes two half-clamps, ear plates, and multiple bolts. The two half-clamps are fastened together to form a tubular clamp. Ear plates are provided on both sides of the half-clamps. The multiple bolts secure the four ear plates together. The two half-clamps are wrapped around the pole. The multiple bolts pass through the four ear plates of the two half-clamps and are locked to secure the two half-clamps through the four ear plates. The two half-clamps are tightly wrapped around the pole. The structure is simple and the clamp is strong.

[0013] Preferably, it also includes two seat rings, two bolts, and multiple support rollers. The two seat rings are connected by two bolts after being joined together. Multiple support rollers are rotatably mounted on the upper end face of the two seat rings, and the multiple support rollers roll to support the lower end face of the two half-hoops. The two half-hoops are fitted onto the pole, and the two half-hoops are movably connected by multiple bolts. The two seat rings are fitted onto the pole, and the two seat rings are movably connected by two bolts. After the two half-hoops and the two seat rings reach the designated position on the pole, the two bolts are tightened to hold the two seat rings tightly on the pole, and the two half-hoops are loosened so that the multiple support rollers roll to support the two half-hoops, thereby flexibly adjusting the angle and direction of the two crossarms. After the angle of the two crossarms is adjusted, the multiple bolts are tightened to hold the two half-hoops tightly on the pole, and the two bolts are loosened to remove the two seat rings from the pole for recycling, saving costs.

[0014] Preferably, the lower edge of the inner wall of the two semi-hoops is provided with a tapered guide surface, and the support wheel surface of the multiple support rollers matches the tapered guide surface of the two semi-hoops; by setting the tapered guide surface, the contact area between the two semi-hoops and the multiple support rollers is increased. When the angle of the two semi-hoops is adjusted to the position and the multiple bolts are tightened, the two semi-hoops slide upward and inward along the multiple support rollers through the tapered guide surface and approach and hug the pole, improving the ease of operation.

[0015] Compared with the prior art, the beneficial effects of the present invention are: it can adjust the spacing of multiple cables to adapt to positions such as cable corners, avoid multiple cables being too close together on the crossarm, which could cause insulation failure accidents, and ensure good safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front structure of the present invention; Figure 2 This is an isometric schematic diagram of the present invention; Figure 3 It is a structural diagram of the telescopic pole, crossarm, mounting plate, slider and clamping assembly, etc. Figure 4 It is an isometric schematic diagram of the structure, including the telescopic rod, crossarm, mounting plate, slider, and clamping assembly; Figure 5 It is a structural diagram showing the exploded state of structures such as telescopic poles, crossarms, and mounting plates; Figure 6 This is a structural schematic diagram of the wire clamping assembly; Figure 7 It is a structural diagram of the clamp assembly, seat ring, bolts, and support rollers, etc. Figure 8 yes Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0017] The following are labeled in the attached diagram: 1. Clamp assembly; 2. Telescopic rod; 3. Crossarm; 4. Mounting plate; 5. Slider; 6. Wire clamp assembly; 7. Guide groove; 8. Countersunk hole; 9. Bolt 1; 10. Shaft; 11. Bolt 2; 12. Arc-shaped clamping plate; 13. Threaded sleeve; 14. Screw 1; 15. Screw 2; 16. Soft metal block; 17. Shaft; 18. Ceramic cam; 19. Sub-screw; 20. Female screw; 21. Half clamp; 22. Ear plate; 23. Bolt 3; 24. Seat ring; 25. Bolt 4; 26. Support roller. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0019] Example 1 like Figures 1 to 6As shown, an adjustable composite crossarm includes a clamp assembly 1, two telescopic rods 2, and two crossarm arms 3. The clamp assembly 1 clamps onto the pole, and the outer ends of the two telescopic rods 2 are respectively hinged to the middle of the two crossarm arms 3. It also includes two mounting plates 4, multiple sliders 5, multiple wire clamping assemblies 6, guide grooves 7, multiple countersunk holes 8, and multiple bolts 9. The two mounting plates 4 are vertically mounted on the outer walls of both sides of the clamp assembly 1. The inner ends of the two telescopic rods 2 are respectively hinged to one end of the two mounting plates 4, and the inner ends of the two crossarm arms 3 are respectively hinged to the other end of the two mounting plates 4. The end faces of the two crossarm arms 3 facing away from the telescopic rods 2... An installation groove is provided, and multiple sliders 5 are slidably installed in the installation grooves of the two crossarms 3 respectively. A wire clamping assembly 6 is installed on each slider 5. Guide grooves 7 communicating with the installation grooves are provided on both side walls of the two crossarms 3. Multiple countersunk holes 8 are evenly provided on both side walls of the two crossarms 3. The diameter of the countersunk holes 8 is larger than the width of the guide grooves 7, and the center of the countersunk holes 8 is located on the centerline of the guide grooves 7. Multiple bolts 9 pass through the guide grooves 7 and are rotatably screwed to the sliders 5. The diameter of the nut of the bolts 9 is slightly smaller than the diameter of the countersunk hole 8. The telescopic rod 2 includes a threaded sleeve 13, a screw 14, and a screw 15. The threaded sleeve 13... The inner wall has positive and negative threads at both ends. One end of screw 14 is hinged to mounting plate 4, and the other end of screw 14 is rotatably screwed to the inner end of threaded sleeve 13. One end of screw 2 15 is hinged to the middle of crossarm 3, and the other end of screw 2 15 is rotatably screwed to the outer end of threaded sleeve 13. A locking structure for locking screws 14 and 2 15 is provided on threaded sleeve 13. The locking structure consists of openings and soft metal blocks 16 on the side walls at both ends of threaded sleeve 13, with multiple soft metal blocks 16 embedded in the openings. The wire clamping assembly 6 includes two shafts 17, two ceramic cams 18, and insert rods. Two shafts 17 are rotatably mounted on the slider 5. Two ceramic cams 18 are respectively installed in the middle of the two shafts 17. The two ceramic cams 18 are eccentric to the two shafts 17. The side wall of the protrusion of the two ceramic cams 18 is provided with a slot matching the diameter of the cable. The upper end of the two shafts 17 is provided with a horizontal pin hole. The insert rod passes through the two pin holes to fix the two shafts 17. The insert rod includes a male screw 19 and a female screw 20. The male screw 19 is movably inserted into the pin hole of one shaft 17, and the female screw 20 is movably inserted into the pin hole of the other shaft 17. The male screw 19 and the female screw 20 are rotatably screwed together.

[0020] During installation, the clamp assembly 1 is fitted onto the pole at the designated height. The threaded sleeve 13 is rotated, and its threads engage with screws 14 and 15 to adjust the length of the telescopic rod 2, thereby adjusting the pitch angle of the crossarm 3. After the lengths of the threaded sleeve 13, screws 14 and 15 are adjusted, multiple soft metal blocks 16 are pressed inwards and deformed using hydraulic pliers or similar tools. This fills the gaps between the threads of the threaded sleeve 13, screws 14 and 15, locking them in place. The positions of multiple sliders 5 are adjusted along the mounting slots of the two crossarms 3, causing multiple bolts 9 to move along multiple guide grooves 7. Once the sliders 5 are in place, the bolts 9 are tightened, causing their nuts to sink into the corresponding countersunk holes 8. The nuts of bolts 8 and 9 engage to position and lock multiple sliders 5. Rotating the two shafts 17 causes the protrusions of the two ceramic cams 18 to face the outside of the sliders 5. The cable is placed between the two ceramic cams 18. By turning the screw 19 and the screw 20, the two shafts 17 are rotated respectively, causing the protrusions of the two ceramic cams 18 to rotate to face the inside of the sliders 5. This allows the slots of the two ceramic cams 18 to clamp the two sides of the cable. The ends of the screw 19 and the screw 20 are brought close together and screwed in, thereby locking the two shafts 17 and the two ceramic cams 18, completing the cable installation. The operation is simple, the cable clamping is reliable, and there is no need to wrap the cable. It allows the two ceramic cams 18 to apply greater pressure to the cable, thereby adjusting the spacing of multiple cables, adapting to cable corners and other positions, and preventing multiple cables from being too close together on the crossarm, which could cause insulation failure. It has good safety.

[0021] Example 2 like Figure 4 and Figure 5 As shown, based on Embodiment 1, it also includes two rotating shafts 10 and multiple bolts 11. The rotating shafts 10 are installed in the middle of the two mounting plates 4. The two rotating shafts 10 are rotatably connected to the two side walls of the clamp assembly 1. Multiple threaded holes are provided on the two outer walls of the clamp assembly 1. The multiple bolts 11 pass through the through holes of the two mounting plates 4 and are rotatably screwed into the multiple threaded holes of the clamp assembly 1. It also includes an arc-shaped clamping plate 12. The arc-shaped clamping plate 12 is installed on the upper and lower parts of the two mounting plates 4 facing the end face of the clamp assembly 1. The end of the arc-shaped clamping plate 12 is provided with a protrusion. Arc-shaped grooves matching the arc-shaped clamping plate 12 are provided on the two outer walls of the clamp assembly 1.

[0022] The two mounting plates 4 can rotate around the two pivots 10, thereby adjusting the orientation of the multiple cable clamping components 6 on the crossarm 3. The two mounting plates 4 are fixed to the clamping assembly 1 by multiple bolts 11. When the crossarm 3 is in the upper position, the multiple cable clamping components 6 support multiple cables. When the crossarm 3 is in the lower position, the multiple cable clamping components 6 suspend multiple cables, thereby realizing different cable installation processes. The mounting plates 4 cooperate with the arc-shaped slots of the clamping assembly 1 through the arc-shaped clamping plate 12. The arc-shaped clamping plate 12 is hooked and connected to the arc-shaped slots of the clamping assembly 1, improving the connection reliability between the two mounting plates 4 and the clamping assembly 1.

[0023] Example 3 like Figure 7 and Figure 8 As shown, based on Embodiment 1, the clamp assembly 1 includes two half-clamps 21, ear plates 22, and multiple bolts 23. The two half-clamps 21 are fastened together to form a tubular clamp. Ear plates 22 are provided on both sides of the half-clamps 21. The multiple bolts 23 screw the four ear plates 22 together. It also includes two seat rings 24, two bolts 25, and multiple support rollers 26. The two seat rings 24 are connected by two bolts 25 after being joined together. Multiple support rollers 26 are rotatably mounted on the upper end face of the two seat rings 24. The multiple support rollers 26 roll to support the lower end face of the two half-clamps 21. The lower edge of the inner wall of the two half-clamps 21 is provided with a tapered guide surface. The support wheel surface of the multiple support rollers 26 matches the tapered guide surface of the two half-clamps 21.

[0024] Two half-hoops 21 are fitted onto the pole, and multiple bolts 3 23 movably connect the two half-hoops 21. Two seat rings 24 are fitted onto the pole, and two bolts 4 25 movably connect the two seat rings 24. After the two half-hoops 21 and the two seat rings 24 reach the designated position on the pole, the two bolts 4 25 are tightened to hold the two seat rings 24 tightly onto the pole. The two half-hoops 21 are then loosened, allowing multiple support rollers 26 to roll and support the two half-hoops 21, thereby flexibly adjusting the angle and direction of the two crossarms 3. After the angle of the two crossarms 3 is adjusted, the multiple bolts 3 23 are tightened, and the two half-hoops 21 slide upward and inward along the multiple support rollers 26 through the conical guide surface, approaching and holding the pole tightly.

[0025] like Figures 1 to 8As shown, an adjustable composite crossarm of the present invention, in operation, firstly, two half-hoops 21 encircle the pole, and multiple bolts 23 are passed through the four ear plates 22 of the two half-hoops 21. Tightening the bolts 23 locks the two half-hoops 21 in place via the ear plates 22. The two half-hoops 21 are then positioned on the pole. Next, the threaded sleeve 13 is rotated, and its threads engage with screws 14 and 15 to adjust the length of the telescopic rod 2, thereby adjusting the pitch angle of the crossarm arm 3. Using hydraulic pliers or similar tools, multiple soft metal blocks 16 are pressed inwards and deformed, filling the gaps between the threads of the threaded sleeve 13, screws 14 and 15, thus locking the threaded sleeve 13, screws 14 and 15. Finally, the positions of multiple sliders 5 are adjusted along the mounting grooves of the two crossarm arms 3. The sliders 5 are positioned such that they drive the bolts 9 to move along the guide grooves 7. Once the sliders 5 are in place, the bolts 9 are rotated and tightened, causing their nuts to sink into the corresponding countersunk holes 8. The countersunk holes 8 and the nuts of the bolts 9 engage to position and lock the sliders 5. Finally, the two shafts 17 are rotated so that the protrusions of the two ceramic cams 18 face the outside of the sliders 5. The cable is placed between the two ceramic cams 18. The two shafts 17 are rotated through the male screw 19 and the female screw 20 so that the protrusions of the two ceramic cams 18 rotate to face the inside of the sliders 5. The slots of the two ceramic cams 18 clamp the two sides of the cable. The ends of the male screw 19 and the female screw 20 are brought close together and screwed in, thereby locking the two shafts 17 and the two ceramic cams 18. This allows the spacing of the multiple cables to be adjusted.

[0026] The main functions achieved by this invention are: 1. It can adjust the spacing of multiple cables to prevent multiple cables from being too close together on the crossarm, which could cause insulation failure and ensure good safety; 2. It can support and hang cables, enabling different cable installation processes; 3. The angle of the crossarm 3 can be adjusted and locked; 4. It can quickly clamp and install cables, making operation simple and quick; 5. The angle and direction of the two crossarms 3 can be flexibly adjusted.

[0027] The adjustable composite crossarm of this invention uses common mechanical methods for installation, connection, or setting. Any method that achieves the desired beneficial effect can be implemented. The clamp assembly 1, telescopic rod 2, crossarm arm 3, slider 5, bolt 1 9, bolt 2 11, threaded sleeve 13, screw 1 14, screw 2 15, soft metal block 16, ceramic cam 18, shaft 17, female screw 19, female screw 20, bolt 3 23, bolt 4 25, and support roller 26 are commercially available. Technical personnel in this industry only need to install and operate them according to the accompanying instruction manual, without requiring any creative effort from those skilled in the art.

[0028] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An adjustable composite crossarm, comprising a clamp assembly (1), two telescopic rods (2), and two crossarm arms (3), wherein the clamp assembly (1) clamps onto the pole, and the outer ends of the two telescopic rods (2) are respectively hinged to the middle portions of the two crossarm arms (3); characterized in that, It also includes two mounting plates (4), multiple sliders (5), multiple clamping assemblies (6), guide grooves (7), multiple countersunk holes (8), and multiple bolts (9). The two mounting plates (4) are vertically mounted on the outer walls of the clamping assembly (1) on both sides. The inner ends of the two telescopic rods (2) are hinged to one end of the two mounting plates (4), and the inner ends of the two crossarms (3) are hinged to the other end of the two mounting plates (4). Mounting grooves are provided on the end faces of the two crossarms (3) away from the telescopic rods (2). Multiple sliders (5) are slidably mounted on the two mounting plates (4). In the mounting groove of the crossarm (3), a clamping assembly (6) is installed on multiple sliders (5). Guide grooves (7) communicating with the mounting groove are provided on both sides of the two crossarms (3). Multiple countersunk holes (8) are evenly provided on both sides of the two crossarms (3). The diameter of the countersunk hole (8) is greater than the width of the guide groove (7). The center of the multiple countersunk holes (8) is located on the center line of the multiple guide grooves (7). Multiple bolts (9) pass through the multiple guide grooves (7) and are rotated and screwed to the multiple sliders (5). The diameter of the nut of the bolt (9) is slightly smaller than the diameter of the countersunk hole (8).

2. The adjustable composite crossarm as described in claim 1, characterized in that, It also includes two rotating shafts (10) and multiple bolts (11). The rotating shafts (10) are installed in the middle of the two mounting plates (4). The two rotating shafts (10) are rotatably connected to the two side walls of the clamp assembly (1). Multiple threaded holes are provided on the two outer walls of the clamp assembly (1). Multiple bolts (11) pass through the through holes of the two mounting plates (4) and are rotatably screwed into the multiple threaded holes of the clamp assembly (1).

3. An adjustable composite crossarm as described in claim 2, characterized in that, It also includes an arc-shaped clamping plate (12), with the arc-shaped clamping plate (12) installed on the upper and lower parts of the two mounting plates (4) facing the end face of the clamping assembly (1). The end of the arc-shaped clamping plate (12) is provided with a protrusion, and the outer walls on both sides of the clamping assembly (1) are provided with arc-shaped grooves that match the arc-shaped clamping plate (12).

4. An adjustable composite crossarm as described in claim 1, characterized in that, The telescopic rod (2) includes a threaded sleeve (13), a screw rod one (14) and a screw rod two (15). The inner walls of the threaded sleeve (13) are respectively provided with positive and negative threads. One end of the screw rod one (14) is hinged to the mounting plate (4). The other end of the screw rod one (14) is rotatably screwed to the inner end of the threaded sleeve (13). One end of the screw rod two (15) is hinged to the middle of the crossarm (3). The other end of the screw rod two (15) is rotatably screwed to the outer end of the threaded sleeve (13). The threaded sleeve (13) is provided with a locking structure for locking screw rod one (14) and screw rod two (15).

5. An adjustable composite crossarm as described in claim 4, characterized in that, The locking structure consists of openings and soft metal blocks (16) on the side walls of both ends of the threaded sleeve (13), with multiple soft metal blocks (16) respectively embedded in the multiple openings.

6. An adjustable composite crossarm as described in claim 1, characterized in that, The wire clamping assembly (6) includes two shafts (17), two ceramic cams (18), and a plug. The two shafts (17) are rotatably mounted on the slider (5). The two ceramic cams (18) are respectively mounted on the middle part of the two shafts (17). The two ceramic cams (18) are eccentric to the two shafts (17). The middle part of the side wall of the protrusion of the two ceramic cams (18) is provided with a slot matching the diameter of the cable. The upper end of the two shafts (17) is provided with a horizontal pin hole. The plug passes through the two pin holes to fix the two shafts (17).

7. An adjustable composite crossarm as described in claim 6, characterized in that, The insert includes a sub-screw (19) and a female screw (20). The sub-screw (19) is movably inserted into the pin hole of a shaft (17), and the female screw (20) is movably inserted into the pin hole of another shaft (17). The sub-screw (19) and the female screw (20) are rotatably screwed together.

8. An adjustable composite crossarm as described in claim 1, characterized in that, The clamp assembly (1) includes two half clamps (21), ear plates (22) and multiple bolts (23). The two half clamps (21) are fastened together to form a tubular clamp. Ear plates (22) are provided on both sides of the half clamps (21). Multiple bolts (23) fasten the four ear plates (22) together.

9. An adjustable composite crossarm as described in claim 8, characterized in that, It also includes two seat rings (24), two bolts (25) and multiple support rollers (26). The two seat rings (24) are connected by two bolts (25) after being joined together. Multiple support rollers (26) are rotatably installed on the upper end face of the two seat rings (24). The multiple support rollers (26) roll to support the lower end face of the two half hoop (21).

10. An adjustable composite crossarm as described in claim 9, characterized in that, The lower edge of the inner wall of the two half-hoops (21) is provided with a tapered guide surface, and the support wheel surface of the multiple rollers (26) matches the tapered guide surface of the two half-hoops (21).

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