An easily installed electrical cross arm

Abstract

The application discloses an easily-installed electric power cross arm which is used for being installed on a telegraph pole, the diameter of the telegraph pole is gradually reduced from the bottom to the top; the electric power cross arm comprises a transverse rod, two first connecting rods arranged in an X shape are arranged on the transverse rod, C-shaped arms are rotationally connected to the upper ends and the lower ends of the two first connecting rods, upper slide rods and lower slide rods arranged vertically are fixedly arranged at the middle part of the transverse rod, first slide rods are slidably connected to the upper slide rods and the lower slide rods in the vertical direction, connecting blocks are arranged on the convex shafts where the C-shaped arms are rotationally connected with the first connecting rods, the connecting blocks are slidably connected to the first slide rods in the left-right direction, and elastic components are arranged on the first slide rods; a guide component for being pressed on the telegraph pole is arranged in each C-shaped arm, clamping components matched with the C-shaped arms are arranged between the upper ends of the two first connecting rods and between the lower ends of the two first connecting rods; the electric power cross arm is not only simple in structure but also convenient to install.

Description

Technical Field

[0001] This invention relates to the field of power technology, and in particular to an easy-to-install power crossarm. Background Technology

[0002] In recent years, with the rapid development of my country's power industry, the demand for power poles has also increased. Since most pole installations are located in the field, and there is a lack of large working platforms suitable for the required height, power workers must manually climb power poles for installation. Among the items to be installed, the crossarm serves to support the electrical equipment subsequently installed on it, making its installation particularly important. Currently, the traditional installation method requires power workers to climb to the top of the pole beforehand, then use insulated ropes to hoist the crossarm to the top, and then install and secure it. Afterward, insulators and other devices are hoisted and installed. During these hoisting processes, power workers need to hoist slowly to prevent the crossarm, insulators, and other equipment from being worn by the concrete pole, which could lead to potential safety hazards. This installation method is extremely dangerous because power workers need to operate with both hands during hoisting or installation. Furthermore, to ensure the equipment is not damaged, the hoisting speed cannot be increased, resulting in extremely low efficiency, high labor intensity, and cumbersome operation. Summary of the Invention

[0003] The purpose of this invention is to provide an easy-to-install power crossarm, which is not only simple in structure but also convenient to install.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an easy-to-install power crossarm, which is used to install on a utility pole, the diameter of which gradually decreases from bottom to top; the power crossarm includes a horizontal bar, on which two first connecting rods are arranged in an X-shape, and C-arms are rotatably connected to the upper and lower ends of the two first connecting rods; a vertically arranged upper sliding rod and a lower sliding rod are fixed in the middle of the horizontal bar, and the upper sliding rod and the lower sliding rod are in a coaxial position; a first sliding rod arranged in a left-right direction is slidably connected to the upper sliding rod and the lower sliding rod; a connecting block is provided on the convex shaft rotatably connected to the first connecting rods of the C-arms, and the connecting block is slidably connected to the first sliding rods in the left-right direction; an elastic component is provided on the first sliding rod for forcing the connecting block to move closer to the upper sliding rod and the lower sliding rod; a guide component for pressing against the utility pole is provided in each C-arm; clamping components that cooperate with the C-arms are provided between the upper ends and between the lower ends of the two first connecting rods.

[0005] Furthermore, the elastic component includes a first spring, and each end of the first slide rod is fitted with a limiting end. The first spring is sleeved on the first slide rod and located between the connecting block and the limiting end. The first spring is used to force the connecting block to move away from the limiting end.

[0006] Furthermore, the guiding assembly includes a roller shaft with guide rods slidably connected to both ends of the roller shaft within the C-arm. Each guide rod has a limiting block at its end extending out of the C-arm. The roller shaft is horizontally positioned and perpendicular to the first guide rod. A guide roller is rotatably connected to the outer side of the roller shaft. A second spring is sleeved on each guide rod between the C-arm and the roller shaft. The second spring is used to force the guide roller to press against the utility pole.

[0007] Furthermore, the clamping assembly includes a clamping box, with sliding grooves on both the left and right sides of the clamping box. A protruding plate for insertion into the sliding groove is hinged to the end of the C-arm away from the first slide rod. Each protruding plate has a ratchet surface and a convex surface on both sides. A rack is slidably connected inside the clamping box. The rack is horizontally positioned and perpendicular to the first slide rod. A clamping head for clamping onto the utility pole is located at the end of the rack near the first slide rod. A clamping plate is located on the transverse rod, directly opposite the clamping head. The clamping box contains a transmission assembly that engages with the rack and the convex surfaces on the protruding plate, and a one-way control assembly that engages with the ratchet surface on the protruding plate. When the protruding plate moves into the sliding groove, the convex surfaces on the protruding plate engage with the transmission assembly to drive the rack towards the utility pole. The one-way control assembly controls the convex plate's unidirectional movement into the sliding groove.

[0008] Furthermore, the transmission assembly includes a first gear rotatably connected within the clamping box, the first gear meshing with a rack, and a second gear coaxially fixed at the upper end of the first gear, the second gear meshing with the convex tooth surface on the convex plate.

[0009] Furthermore, the one-way control component includes a ratchet plate hinged within a clamping box. A spring plate is provided within the clamping box to force the ratchet plate to press against the ratchet surface of the convex plate. A slot is provided at the upper end of the clamping box, and a pawl extending upward through the slot is provided on the ratchet plate. Moving the pawl can cause the ratchet plate to disengage from the ratchet surface of the convex plate.

[0010] Furthermore, the clamping head is fixedly provided with a guide slider that is parallel to the rack and slidably connected inside the clamping box.

[0011] Furthermore, the upper end of the upper sliding rod and the lower end of the lower sliding rod are both threaded with limit nuts.

[0012] Beneficial effects

[0013] Compared with the prior art, the technical solution of the present invention has the following advantages:

[0014] 1. This invention features two X-shaped first connecting rods, working in conjunction with a clamping assembly. Utilizing the characteristic of concrete utility poles being wider at the bottom and narrower at the top, power workers simply clamp the device onto the pole from the ground, and then a pole climber pushes it upwards. Individual devices such as insulators that need to be installed on the pole can be installed on the ground and then lifted together with the invention. As the invention is lifted, the clamping assembly gradually extends its clamping head, thus holding the pole in place. As the height increases, the pole diameter decreases, reducing the distance between the clamping head and the crossarm, automatically securing the pole and preventing it from falling. Power workers simply need to push it to the appropriate height. This greatly simplifies the installation of power crossarms, eliminating the need for high-altitude hoisting by power workers, thus improving their safety and preventing damage to the crossarm and insulators from the concrete pole, thereby reducing the possibility of future safety hazards.

[0015] 2. This invention features two first connecting rods arranged in an X-shape, which, together with a clamping assembly, utilize the characteristic of the concrete utility pole being wider at the bottom and narrower at the top. This allows power workers to complete the installation simply by pushing the pole to a suitable height. Meanwhile, the remaining devices can also be installed on the ground. This provides operational space for multiple power workers to work together simultaneously, avoiding situations where only one person can perform pole climbing operations. This directly improves the installation efficiency of the power crossarm and reduces the labor intensity of the installation work.

[0016] 3. The present invention is provided with two first connecting rods arranged in an X shape, which, together with the clamping assembly, enable the present invention to adapt to various specifications of cement utility poles, effectively improving the applicability of the present invention and avoiding the need to equip different U-bolts for cement utility poles of different sizes.

[0017] 4. This invention features two first connecting rods arranged in an X-shape, which, together with the clamping assembly and the guiding assembly, ensure that after the power crossarm is installed, the special shape of the clamping head, combined with the use of the second spring and the guide roller, keeps the crossarm directly perpendicular to the cement power pole. The power crossarm is completely symmetrical from left to right, eliminating the need for electricians to manually calibrate it using mallets or other tools. This effectively simplifies the installation process and optimizes the installation effect. Attached Figure Description

[0018] Figure 1 This is a partial 3D view of the completed installation of the present invention;

[0019] Figure 2 This is a partial three-dimensional view of the crossarm portion in its initial state according to the present invention;

[0020] Figure 3 This is a partially sectional three-dimensional view of the installation of the upper slide rod, lower slide rod, and first slide rod of the present invention.

[0021] Figure 4 This is a three-dimensional view of a partial section of the first slide bar inserted into the C-arm of the present invention;

[0022] Figure 5 This is a three-dimensional view of the first sliding rod and the crossarm of the present invention when they are fully connected.

[0023] Figure 6 This is a three-dimensional view of the device of the present invention clamping onto the utility pole;

[0024] Figure 7 This is a three-dimensional view of the protrusion plate after its position has been adjusted according to the present invention.

[0025] Figure 8 This is a three-dimensional view of the clamping box of the present invention just after it has been installed;

[0026] Figure 9 This is a three-dimensional view of the insulator of the present invention after installation;

[0027] Figure 10 This is a three-dimensional view of the device of the present invention when it is raised to the desired position;

[0028] Figure 11 For the present invention Figure 10 A three-dimensional view of the state from another perspective;

[0029] Figure 12 For the present invention Figure 10 A complete 3D view of the status;

[0030] Figure 13 This is a three-dimensional view of the ratchet surface when it disengages from the ratchet plate according to the present invention;

[0031] Figure 14 This is a three-dimensional view of a partial cross-section of the interior of the clamping box of the present invention;

[0032] Figure 15 This is a three-dimensional view of the crossbeam, clamping head, and protruding plate of the present invention. Detailed Implementation

[0033] Please see Figure 1-15As shown, an easy-to-install power crossarm is used to install on a utility pole 5, the diameter of which gradually decreases from bottom to top. The power crossarm includes a horizontal bar 21, on which two first connecting rods 221 arranged in an X-shape are provided. C-shaped arms 231 are rotatably connected to the upper and lower ends of the two first connecting rods 221. A vertically arranged upper sliding rod 11 and lower sliding rod 12 are fixed in the middle of the horizontal bar 21, and the upper sliding rod 11 and lower sliding rod 12 are in a coaxial position. The upper sliding rod 11 and lower sliding rod 12 are slidably connected along the vertical direction. A first slide rod 131 is connected in a left-right direction. A connecting block 2311 is provided on a convex shaft that is rotatably connected to the first connecting rod 221. The connecting block 2311 is slidably connected to the first slide rod 131 in a left-right direction. The first slide rod 131 is provided with an elastic component for forcing the connecting block 2311 to move closer to the upper slide rod 11 and the lower slide rod 12. Each C-arm 231 is provided with a guide component for pressing against the utility pole 5. Clamping components that cooperate with the C-arm 231 are provided between the upper ends and between the lower ends of the two first connecting rods 221. The upper end of the upper slide rod 11 and the lower end of the lower slide rod 12 are threadedly connected with limit nuts 141.

[0034] The elastic component includes a first spring 151, and each end of the first slide rod 131 is equipped with a limiting end 143. The first spring 151 is sleeved on the first slide rod 131 and located between the connecting block 2311 and the limiting end 143. The first spring 151 is used to force the connecting block 2311 to move away from the limiting end 143.

[0035] The guiding assembly includes a roller shaft 24a, with guide rods 24b slidably connected to both ends of the roller shaft 24a within the C-arm 231. Each guide rod 24b extending out of the C-arm 231 has a limiting block 24c. The roller shaft 24a is horizontally positioned and perpendicular to the first guide rod 131. A guide roller 24 is rotatably connected to the outer side of the roller shaft 24a. A second spring 25 is sleeved on each guide rod 24b, located between the C-arm 231 and the roller shaft 24a. The second spring 25 is used to force the guide roller 24 to press against the utility pole 5.

[0036] The clamping assembly includes a clamping box 32. Both sides of the clamping box 32 are provided with sliding grooves 32a arranged in the left-right direction. The end of the C-arm 231 away from the first sliding rod 131 is hinged with a protruding plate 26 for insertion into the sliding groove 32a. Each protruding plate 26 has a ratchet surface 261 and a toothed surface 262 on both sides. A rack 311 is slidably connected inside the clamping box 32. The rack 311 is horizontally arranged and perpendicular to the first sliding rod 131. The end of the rack 311 near the first sliding rod 131 is provided for clamping onto the utility pole. The clamping head 31 on pole 5 has a clamping plate 212 on the transverse rod 21 that is directly opposite to the clamping head 31. The clamping box 32 contains a transmission assembly that engages with the rack 311 and the convex tooth surface 262 on the convex plate 26, and a one-way control assembly that engages with the ratchet surface 261 on the convex plate 26. When the convex plate 26 moves into the insertion slot hole 32a, the convex tooth surface 262 on the convex plate 26 engages with the transmission assembly to drive the rack 311 to move in the direction of the utility pole 5. The one-way control assembly is used to control the convex plate 26 to move unidirectionally into the insertion slot hole 32a. The clamping head 31 is fixedly provided with a guide slider 31a that is parallel to the rack 311 and slidably connected in the clamping box 32. The transmission assembly includes a first gear 3232 rotatably connected within the clamping box 32, which meshes with a rack 311. A second gear 3231 is coaxially fixed at the upper end of the first gear 3232, and meshes with the toothed surface 262 on the convex plate 26. The one-way control assembly includes a ratchet plate hinged within the clamping box 32. A spring plate 322 is provided within the clamping box 32, which forces the ratchet plate to press against the ratchet surface 261 of the convex plate 26. The upper end of the clamping box 32 has a slot, and the ratchet plate has a pawl 3211 extending upward through the slot. Pulling the pawl 3211 can disengage the ratchet plate from the ratchet surface 261 of the convex plate 26.

[0037] The present invention includes the following steps in operation:

[0038] Step 1: Installation of the first sliding rod

[0039] When this device is needed, the two first slide rods 131 must first be installed on the upper slide rod 11 and the lower slide rod 12 respectively. Each set is a sliding connection, so limit nuts 141 need to be installed at the ends of the upper slide rod 11 and the lower slide rod 12. The installation effect is as follows. Figure 3 As shown. Since the C-arm 231 is rotatably connected to the first connecting rod 221, the two ends of the two first sliding rods 131 can be inserted into the connecting block 2311 of the C-arm 231, as shown. Figure 4As shown. Next, align the upper sliding rod 11 and the lower sliding rod 12 with the mating interface 211 on the transverse rod 21 and complete the connection. Then rotate the first connecting rod 221 so that the two upper C-arms 231 and the two lower C-arms 231 move closer together. Then insert the first spring 151 and reinstall the four limiting end caps 143. The completed installation state is as shown. Figure 5 As shown.

[0040] Step 2: Hug the utility pole

[0041] After the attitude adaptation rod is installed, forcefully pry open the two C-shaped arms 231 that are close together and clamp them directly onto the utility pole 5. At this time, the first spring 151 applies a force to the two C-shaped arms 231 to bring them closer together, which in turn causes the four guide rollers 24 to simultaneously hold the utility pole 5 and compress their respective second springs 25, as shown in the figure. Figure 6 As shown. Then rotate the protrusion 26 on the back of the C-arm 231 to the position shown. Figure 7 The state is shown. Then, the clamping box 32 is removed, and the two clamping boxes 32 are positioned vertically, with their respective clamping heads 31 horizontally pressing against the utility pole 5. This results in different lengths of the clamping heads 31 extending beyond the clamping box 32, ensuring that the clamping heads 31 remain firmly against the utility pole 5 during subsequent equipment lifting. The clamping box 32 contains a double-layer gear, with the first gear 3232 at its bottom engaging with the rack 311 of the clamping head 31. Next, the two adjacent C-shaped arms 231 are pried apart, and the four protruding plates 26, arranged in pairs at the same height, are simultaneously inserted into the sliding slots 32a of the clamping box 32. Then, under the push of the first spring 151, the ratchet surface 261 of the protruding plate 26 begins to engage with the ratchet plate, while the protruding surface 262 on the back begins to engage with the second gear 3231, causing the double-layer gear to move as shown. Figure 14 The counter-clockwise rotation from the top-down view causes the clamping head 31 to extend out of the clamping box 32 and hold the utility pole 5 against it. At this point, the device has completed its pole-holding action. Due to the shape of the utility pole 5 (wider at the bottom than at the top), the downward movement of the device will inevitably push the clamping head 31 back into the clamping box 32. However, due to the action of the convex plate 26, the double-layer gear cannot rotate, thus preventing the clamping head 31 from retracting and maintaining its height. The clamping head 31 and the clamping plate 212 on the transverse rod 21 continue to clamp the utility pole 5. Then, the insulator 4 is installed on the transverse rod 21, resulting in the following state: Figure 9 As shown.

[0042] Step 3: Fix the height

[0043] After the remaining devices to be installed on the horizontal pole 21 are installed, the electrician climbs the pole and gradually pushes the device upward. During the ascent, due to the action of the first spring 151 and as the diameter of the utility pole 5 decreases, the two C-shaped arms 231 gradually move closer together, causing the convex plate 26 to continue to penetrate deeper into the clamping box 32. This, in turn, causes the double-layer gears to continue to rotate, continuously pushing out the clamping head 31, keeping it in close contact with the utility pole 5, until the device reaches the required installation height. A partial state is as follows: Figure 10 , 11 The complete state shown is as follows Figure 1 , 11 As shown. To lower the height, simply move the ratchet plate's pin 3211 outwards from the clamping box 32 by hand, causing the ratchet plate to disengage from the ratchet surface 261 of the protrusion plate 26, compressing the spring plate 322, and then lowering the horizontal bar 21 to the required height. The device is now installed and in the required working position. Due to the special shape of the clamping head 31 and clamping plate 212, combined with the use of the second spring 25, the two first sliding rods 131, the upper sliding rod 11, and the lower sliding rod 12, the horizontal bar 21 is fully perpendicular to the utility pole 5, eliminating the need for power workers to use tools for calibration.

[0044] 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 easy-to-install power crossarm, said power crossarm being mounted on a utility pole, the diameter of said utility pole gradually decreasing from bottom to top; characterized in that, The power crossarm includes a horizontal bar with two first connecting rods arranged in an X-shape. C-arms are rotatably connected to the upper and lower ends of the two first connecting rods. A vertically arranged upper sliding rod and a lower sliding rod are fixed in the middle of the horizontal bar, and the upper and lower sliding rods are coaxial. First sliding rods arranged in a left-right direction are slidably connected to the upper and lower sliding rods in the vertical direction. A connecting block is provided on a convex shaft rotatably connected to the first connecting rods in the C-arms. The connecting block is slidably connected to the first sliding rods in the left-right direction. An elastic component is provided on the first sliding rod to force the connecting block to move closer to the upper and lower sliding rods. Each C-arm contains a guide component for pressing against the utility pole. Clamping components that cooperate with the C-arms are provided between the upper and lower ends of the two first connecting rods.

2. The easily installable power crossarm according to claim 1, characterized in that, The elastic component includes a first spring, and each end of the first slide rod is fitted with a limiting end. The first spring is sleeved on the first slide rod and located between the connecting block and the limiting end. The first spring is used to force the connecting block to move away from the limiting end.

3. The easily installable power crossarm according to claim 2, characterized in that, The guiding assembly includes a roller shaft with guide rods slidably connected to both ends of the roller shaft within a C-arm. Each guide rod has a limiting block at its end extending out of the C-arm. The roller shaft is horizontally positioned and perpendicular to the first guide rod. A guide roller is rotatably connected to the outer side of the roller shaft. A second spring is sleeved on each guide rod between the C-arm and the roller shaft. The second spring is used to force the guide roller to press against the utility pole.

4. The easily installable power crossarm according to claim 1, characterized in that, The clamping assembly includes a clamping box, with sliding grooves on both sides of the clamping box arranged in a left-right direction. A protruding plate for insertion into the sliding groove is hinged to the end of the C-arm away from the first slide rod. Each protruding plate has a ratchet surface and a convex surface on both sides. A rack is slidably connected inside the clamping box. The rack is horizontally arranged and perpendicular to the first slide rod. A clamping head for clamping onto a utility pole is provided at the end of the rack near the first slide rod. A clamping plate is provided on the transverse rod, directly opposite the clamping head. The clamping box contains a transmission assembly that engages with the rack and the convex surfaces on the protruding plate, and a one-way control assembly that engages with the ratchet surface on the protruding plate. When the protruding plate moves into the sliding groove, the convex surfaces on the protruding plate engage with the transmission assembly to drive the rack towards the utility pole. The one-way control assembly controls the convex plate's unidirectional movement into the sliding groove.

5. The easily installable power crossarm according to claim 4, characterized in that, The transmission assembly includes a first gear rotatably connected inside the clamping box, the first gear meshing with a rack, and a second gear coaxially fixed at the upper end of the first gear, the second gear meshing with the convex tooth surface on the convex plate.

6. The easily installable power crossarm according to claim 4, characterized in that, The one-way control assembly includes a ratchet plate hinged in a clamping box. A spring plate is provided in the clamping box to force the ratchet plate to press against the ratchet surface of the convex plate. The upper end of the clamping box is provided with a slot, and the ratchet plate is provided with a pawl extending upward through the slot. Moving the pawl can cause the ratchet plate to disengage from the ratchet surface of the convex plate.

7. The easily installable power crossarm according to claim 4, characterized in that, The clamping head is fixedly provided with a guide slider that is parallel to the rack and slidably connected inside the clamping box.

8. The easily installable power crossarm according to claim 1, characterized in that, The upper end of the upper slide rod and the lower end of the lower slide rod are both threaded with limit nuts.

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