Automatic cable following device for tower crane

Abstract

The application discloses a tower crane cable automatic following-up device and belongs to the technical field of tower crane auxiliary equipment. The device comprises a guide cylinder which is hinged by a movable end and a fixed end, and a clamping mechanism is arranged outside the guide cylinder. The clamping mechanism comprises multiple groups of rotating seats which are uniformly distributed along the circumferential outer wall of the guide cylinder, the rotating seats are hinged to clamping arms through rotating pins, the clamping arms are provided with sliding grooves and a reset tensioning mechanism, and the reset tensioning mechanism is composed of an adjusting screw, a reset spring and an adjusting nut. The fixed end of the guide cylinder is connected to a fixing mechanism through a connecting rod, a connecting piece, a pressing plate, an adjusting rod and a fixing nut, and can be clamped and fixed on a tower crane standard section. The device adopts a multiple-clamping-arm ring embracing type elastic clamping, can self-adaptively adapt to cables of different specifications, can realize automatic synchronous climbing of the cables along with the tower crane top lifting, can limit cable shaking, winding and friction damage, greatly reduces the risk of manual climbing, and is convenient to install and disassemble, has high universality and good protection effect.

Description

Technical Field

[0001] This invention relates to the field of tower crane equipment technology, specifically to an automatic cable lifting device for tower cranes. Background Technology

[0002] Tower cranes are widely used in building construction. As the construction floors increase, tower cranes need to be continuously lifted to connect standard sections. The traditional methods of laying their power supply cables are mostly hanging, binding and fixing, or manually binding them section by section as they are raised.

[0003] The existing technology has the following drawbacks:

[0004] Cables that are suspended in the air for a long time are subject to swaying and shaking under wind loads, which can easily cause friction, entanglement, and scratches with the standard sections and attachment frames of tower cranes. Damage to the insulation layer can lead to leakage safety hazards. When the tower crane is being raised to a higher position, it is necessary to manually climb up and loosen and re-tie the cables section by section. This involves a large amount of work at height, high labor intensity, and risks of falling from height and being crushed or pinched. The cable lacks a centered guide and self-adaptive clamping structure, making it prone to twisting and pulling during lifting and lowering. Long-term stress can easily lead to breakage of the internal wire core of the cable, shortening its service life. Traditional fixing methods have poor versatility, cannot be adapted to different specifications of tower crane standard sections and different thicknesses of power supply cables, and are cumbersome to install and disassemble, with poor reusability.

[0005] In view of the problems of existing technologies such as strong reliance on manual labor, significant safety hazards, easy damage to cables, and poor adaptability, there is an urgent need to design an automatic tower crane cable lifting device that can automatically climb synchronously with the tower crane jacking, self-adaptive clamping, convenient installation, and good protection. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic cable lifting device for tower cranes, which solves the problems of manual cable binding and lifting, easy swaying and wear, high risk of high-altitude operation, poor adaptability, and easy cable pulling damage in existing tower cranes. It realizes cable centering guidance, adaptive elastic clamping, and automatic synchronous lifting, which greatly reduces the risk of manual climbing and improves construction safety and cable service life.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An automatic cable lifting device for tower cranes includes a guide cylinder composed of a movable end and a fixed end, and a clamping mechanism is provided on the outer side of the guide cylinder; The clamping mechanism includes multiple sets of rotating seats evenly arranged on the outer surface of the guide cylinder. Each set of rotating seats is rotatably connected to a clamping arm by a rotating pin. A sliding groove is provided through the clamping arm, and a reset tensioning mechanism is provided inside the sliding groove. The reset tensioning mechanism includes an adjusting screw that passes through the inside of the slide groove. One end of the adjusting screw is fixedly connected to the surface of the guide cylinder, and the other end of the adjusting screw passes through the slide groove and is provided with an adjusting nut. A reset spring is also sleeved on the surface of the adjusting screw. The outer side of the fixed end of the guide cylinder is connected to the horizontal component of the standard section of the tower crane through a fixing mechanism.

[0008] More preferably, one side of the movable end and the fixed end are rotatably connected by a rotating shaft, and a first connecting ring is symmetrically arranged on the other side of the movable end, and a second connecting ring is arranged on the other side of the fixed end at a position corresponding to the position between the two first connecting rings; When the first connecting ring and the second connecting ring are on the same vertical axis, the movable end and the fixed end are locked by inserting a pin into the first connecting ring and the second connecting ring; When the pin is pulled out of the first connecting ring and the second connecting ring, and the movable end rotates away from the second connecting ring under the action of the rotating shaft, the movable end opens from the fixed end.

[0009] More preferably, the clamping arm has at least one positioning hole at one end near the rotating seat, and the positioning hole is connected to the rotating pin.

[0010] More preferably, the end of the clamping arm near the center of the guide cylinder is provided with an arc-shaped wedge, and the surface of the arc-shaped wedge is provided with anti-slip texture.

[0011] More preferably, the reset spring is disposed on the surface of the adjusting screw between the bottom of the clamping arm and the guide cylinder.

[0012] More preferably, the top of the guide cylinder is provided with a reserved groove corresponding to the clamping arm.

[0013] More preferably, the fixing mechanism includes connecting rods symmetrically connected to the outer surface of the fixing end, a connecting member is provided at the other end of the connecting rod, a pressure plate is provided inside the connecting member, and an adjusting rod is connected to the center of the side of the pressure plate away from the connecting rod by a bearing, the other end of the adjusting rod penetrates the side wall of the connecting member, and a fixing nut is also provided at the connection between the outer surface of the connecting member and the adjusting rod, and the adjusting rod and the fixing nut are connected by a screw connection.

[0014] More preferably, the connector has an overall inverted U-shaped structure.

[0015] More preferably, one end of the rotating pin is provided with a pull ring, and the other end of the rotating pin is provided with a fixing member.

[0016] Compared with the prior art, the beneficial effects of the present invention are: Quick assembly and disassembly, reducing frequent high-altitude operations: The guide cylinder adopts a hinged opening and closing structure with a movable end and a fixed end. The movable end can be opened by pulling out the pin, and the cable can be quickly inserted without the need for wire threading. It can be directly clamped onto the standard section of the tower crane through the inverted U-shaped fixing mechanism. The installation and disassembly are convenient and it can be reused repeatedly.

[0017] Adaptive elastic clamping with strong adaptability: Multiple clamping arms, together with return springs and adjusting screws, can adaptively clamp tower crane power cables of different diameters. The arc wedge design with anti-slip texture ensures a stable clamping without damaging the cable sheath, while allowing the cable to slide upwards with the tower crane as it rises.

[0018] Automatic lifting and good protection: The guide cylinder forms a central limiting guide for the cable, preventing the cable from swaying in the wind and rubbing and tangling with the standard section, eliminating the risk of leakage due to insulation damage; when the tower crane is being lifted to a higher position, the cable can automatically and synchronously climb under the limiting position of the clamping arm, without the need for manual loosening and fixing multiple times.

[0019] Adjustable structure and high stability: The preload of the reset spring can be adjusted by adjusting the nut to control the clamping force of the clamping arm; the fixing mechanism drives the pressure plate to tighten the standard section through the adjusting rod, which can be adapted to standard section components of different specifications and is firmly fixed without loosening.

[0020] Easy to maintain and long service life: The rotating pin with pull ring design allows for quick disassembly of the clamping arm for inspection and replacement; the overall mechanical structure has no electrical control components, is resistant to outdoor wind, rain, sun and corrosion, has a low failure rate, and is suitable for various construction sites. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a top view of the overall structure of the present invention; Figure 3 This is a cross-sectional view of the overall structure of the present invention; In the diagram: 1. Movable end; 2. Fixed end; 3. Rotating shaft; 4. First connecting ring; 5. Second connecting ring; 6. Adjusting screw; 7. Return spring; 8. Adjusting nut; 9. Clamping arm; 10. Rotating seat; 11. Slide groove; 12. Rotating pin; 13. Reserved slot; 14. Connecting rod; 15. Connecting piece; 16. Pressure plate; 17. Adjusting rod; 18. Fixed nut; 19. Pull ring. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-3 The present invention provides a technical solution: An automatic cable lifting device for tower cranes includes a guide cylinder composed of a movable end 1 and a fixed end 2, and a clamping mechanism is provided on the outside of the guide cylinder. The clamping mechanism includes multiple sets of rotating seats 10 evenly arranged on the outer surface of the guide cylinder. Each set of rotating seats 10 is rotatably connected to a clamping arm 9 by a rotating pin 12. A sliding groove 11 is provided through the clamping arm 9, and a reset tensioning mechanism is provided inside the sliding groove 11. The reset tensioning mechanism includes an adjusting screw 6 that passes through the inside of the slide groove 11. One end of the adjusting screw 6 is fixedly connected to the surface of the guide cylinder, and the other end of the adjusting screw 6 passes through the slide groove 11 and is provided with an adjusting nut 8. A reset spring 7 is also sleeved on the surface of the adjusting screw 6. The outer side of the fixed end 2 of the guide cylinder is connected to the horizontal component of the standard section of the tower crane through a fixing mechanism.

[0024] In this invention, one side of the movable end 1 and the fixed end 2 are rotatably connected by a rotating shaft 3. A first connecting ring 4 is symmetrically arranged on the other side of the movable end 1, and a second connecting ring 5 is arranged on the other side of the fixed end 2 at the position between the two first connecting rings 4. When the first connecting ring 4 and the second connecting ring 5 are on the same vertical axis, the movable end 1 and the fixed end 2 are locked by inserting the first connecting ring 4 and the second connecting ring 5 with a pin. When the pin is pulled out of the first connecting ring 4 and the second connecting ring 5, and the movable end 1 rotates away from the second connecting ring 5 under the action of the rotating shaft 3, the movable end 1 opens from the fixed end 2.

[0025] In this invention, the clamping arm 9 has at least one positioning hole at one end near the rotating seat 10, and the positioning hole is connected to the rotating pin 12 in a cooperative manner; one end of the rotating pin 12 is provided with a pull ring 19, and the other end of the rotating pin 12 is provided with a fixing member. The end of the clamping arm 9 near the center of the guide cylinder is provided with an arc-shaped wedge, and the surface of the arc-shaped wedge is provided with anti-slip texture. The return spring 7 is provided on the surface of the adjusting screw 6 between the bottom of the clamping arm 9 and the guide cylinder; the top of the guide cylinder is also provided with a reserved groove 13 corresponding to the clamping arm 9.

[0026] In this invention, the fixing mechanism includes connecting rods 14 symmetrically connected to the outer surface of the fixing end 2. A connecting member 15 is provided at the other end of the connecting rods 14. A pressure plate 16 is provided inside the connecting member 15, and an adjusting rod 17 is connected to the center of the side of the pressure plate 16 away from the connecting rods 14 via a bearing. The other end of the adjusting rod 17 penetrates the side wall of the connecting member 15, and a fixing nut 18 is provided at the connection point between the outer surface of the connecting member 15 and the adjusting rod 17. The adjusting rod 17 and the fixing nut 18 are connected by a screw thread. The connecting member 15 has an overall inverted U-shaped structure.

[0027] Example: Both the movable end 1 and the fixed end 2 are made of 5mm thick hot-dip galvanized steel sheet bent into an arc-shaped cylindrical structure. The two are joined together to form a complete circular guide cylinder. The guide cylinder is arranged vertically and is used to pass through the tower crane power supply cable. One side of the movable end 1 is hinged to the fixed end 2 through a rotating shaft 3 to form a hinge-type openable structure. Two first connecting rings 4 are symmetrically welded to the other side of the movable end 1, and a second connecting ring 5 is welded to the fixed end 2 at the middle position of the two first connecting rings 4. After the movable end 1 is closed, the first connecting ring 4 and the second connecting ring 5 are vertically coaxial, and can be locked closed by inserting a pin. After the pin is pulled out, the movable end 1 can be rotated outward around the rotating shaft 3 to open, and the cable can be inserted laterally without having to pass through the cable end, making installation and modification convenient.

[0028] Three sets of rotating seats 10 are evenly distributed on the outer surface of the guide cylinder. The three sets of rotating seats are symmetrically distributed along the circumference at adjacent included angles of 120°. Each set of rotating seats 10 is connected by a rotating pin 12 to rotatably mount a clamping arm 9. A total of three clamping arms 9 are provided, arranged in an equilateral triangle at 120°, forming a three-point balanced ring clamping of the central cable. The 120° clamping, combined with the overall fixing structure, ensures uniform force distribution, firm installation, and convenient assembly and disassembly without damaging the original standard section structure of the tower crane.

[0029] One end of the rotating pin 12 is integrally equipped with a pull ring 19 for easy manual lifting and removal. The other end of the rotating pin 12 is fitted with a fixing component to prevent slippage. The clamping arm 9 has at least one positioning hole at its end near the rotating seat 10, which is clearance-fitted with the rotating pin 12. The distance between the clamping arms 9 can be changed by inserting the rotating pin 12 into different positioning holes, thereby accommodating cables of different diameters. This allows the clamping arm 9 to freely deflect and swing slightly around the rotating pin 12. The clamping arm 9 has a long groove 11 that runs vertically through the length of the guide cylinder.

[0030] Each clamping arm 9 has an adjusting screw 6 installed inside its corresponding groove 11. The inner end of the adjusting screw 6 is fixedly welded to the outer wall of the guide cylinder. The adjusting screw 6 passes vertically through the groove 11, and the outer protruding end is threaded with an adjusting nut 8. A return spring 7 is fitted on the adjusting screw 6 between the bottom of the clamping arm 9 and the outer wall of the guide cylinder. The return spring 7 is a cylindrical compression spring, which always pushes the clamping arm 9 upward under normal conditions, causing the three clamping arms 9 arranged at 120° to converge towards the center of the guide cylinder. Rotating the adjusting nut 8 can compress or release the return spring 7 to adjust the clamping preload and adapt to tower crane cables of different outer diameters.

[0031] The end of the clamping arm 9 near the center of the guide cylinder is machined with an arc-shaped wedge. The surface of the wedge is pressed with anti-slip texture, which can fit the outer surface of the cable, increase friction, prevent slippage, and avoid damaging the cable insulation layer by hard clamping.

[0032] The top of the guide cylinder is provided with a reserved groove 13 corresponding to the swing path of the three clamping arms 9. The reserved groove 13 is an arc-shaped clearance groove. When the clamping arms 9 open outward to avoid or install / remove cables, the end of the clamping arm 9 can fall into the reserved groove 13 to eliminate structural interference and ensure that the clamping arms 9 rotate and open and close smoothly.

[0033] Two connecting rods 14 are symmetrically welded to the outer surface of the fixed end 2 of the guide cylinder. The outer ends of the connecting rods 14 are fixedly connected to the connecting parts 15. The connecting parts 15 are inverted U-shaped channel steel structures and can be directly snapped onto the horizontal angle steel or round tube beam of the standard section of the tower crane. A pressure plate 16 is set inside the connecting parts 15. The center of the pressure plate 16 on the side away from the connecting rods 14 is connected to the end of the adjusting rod 17 through a bearing. The adjusting rod 17 passes through the side wall of the connecting parts 15 laterally. A fixing nut 18 is fixedly installed at the point where the connecting parts 15 pass through. The adjusting rod 17 and the fixing nut 18 are threaded together.

[0034] Rotating the adjusting rod 17, the threaded transmission drives the clamping plate 16 to horizontally and linearly press against the side wall of the standard section steel of the tower crane, achieving a clamping and fixing without welding or drilling; the bearing structure ensures that the clamping plate 16 only moves horizontally and does not rotate when the adjusting rod 17 rotates.

[0035] This embodiment uses the assembly process: First, attach the inverted U-shaped connector 15 to the horizontal component of the standard tower crane section, and then tighten the adjusting rod 17 to push the clamping plate 16 to secure it in place, thus completing the overall fixation of the device. Pull out the pins inside the first connecting ring 4 and the second connecting ring 5, and flip the movable end 1 outward around the rotating shaft 3 to place the tower crane power supply cable in the center of the guide cylinder. Close the movable end 1, align the first connecting ring 4 and the second connecting ring 5, and then insert the pins to lock it. Under the action of the return spring 7, the three clamping arms 9 form a 120° equilateral triangle that evenly encircles the cable, which not only restricts the radial swaying and twisting of the cable, but also allows the cable to slide smoothly upward under the jacking traction force. Multiple sets of this device are installed at vertical intervals of 3 to 5 meters along the tower crane body. Only one set of this device needs to be installed at each connection point of the tower crane section. There is no need to remove the previously fixed devices. This achieves automatic synchronous climbing and limit protection of the cable. All components work together, and the structure is stable, highly adjustable, and reusable.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] 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 automatic cable-following device for tower cranes, characterized in that: It includes a guide cylinder composed of a movable end (1) and a fixed end (2), and a clamping mechanism is provided on the outside of the guide cylinder; The clamping mechanism includes multiple sets of rotating seats (10) evenly arranged on the outer surface of the guide cylinder. Each set of rotating seats (10) is rotatably connected to a clamping arm (9) by a rotating pin (12). A sliding groove (11) is provided through the clamping arm (9), and a reset tensioning mechanism is provided inside the sliding groove (11). The reset tensioning mechanism includes an adjusting screw (6) that passes through the inside of the slide groove (11). One end of the adjusting screw (6) is fixedly connected to the surface of the guide cylinder, and the other end of the adjusting screw (6) passes through the slide groove (11) and is provided with an adjusting nut (8). A reset spring (7) is also sleeved on the surface of the adjusting screw (6). The outer side of the fixed end (2) of the guide cylinder is connected to the horizontal component of the standard section of the tower crane through a fixing mechanism.

2. The automatic cable-following device for tower cranes according to claim 1, characterized in that: The movable end (1) and the fixed end (2) are rotatably connected by a rotating shaft (3). A first connecting ring (4) is symmetrically arranged on the other side of the movable end (1), and a second connecting ring (5) is arranged on the other side of the fixed end (2) at the position between the two first connecting rings (4). When the first connecting ring (4) and the second connecting ring (5) are on the same vertical axis, the movable end (1) and the fixed end (2) are locked by inserting the first connecting ring (4) and the second connecting ring (5) with a pin; When the pin is pulled out from the first connecting ring (4) and the second connecting ring (5), and the movable end (1) rotates away from the second connecting ring (5) under the action of the rotating shaft (3), the movable end (1) opens from the fixed end (2).

3. The automatic cable-following device for tower cranes according to claim 1, characterized in that: The clamping arm (9) has at least one positioning hole at one end near the rotating seat (10), and the positioning hole is connected to the rotating pin (12).

4. The automatic cable-following device for tower cranes according to claim 1, characterized in that: The clamping arm (9) has an arc-shaped wedge at its end near the center of the guide cylinder, and the surface of the arc-shaped wedge has anti-slip texture.

5. The automatic cable-following device for tower cranes according to claim 1, characterized in that: The reset spring (7) is located on the surface of the adjusting screw (6) between the bottom of the clamping arm (9) and the guide cylinder.

6. The automatic cable-following device for tower cranes according to claim 4, characterized in that: The top of the guide cylinder is also provided with a reserved groove (13) corresponding to the clamping arm (9).

7. The automatic cable-following device for tower cranes according to claim 1, characterized in that: The fixing mechanism includes a connecting rod (14) symmetrically connected to the outer surface of the fixing end (2). The other end of the connecting rod (14) is provided with a connecting piece (15). The connecting piece (15) is provided with a pressure plate (16). An adjusting rod (17) is connected to the center of the side of the pressure plate (16) away from the connecting rod (14) via a bearing. The other end of the adjusting rod (17) passes through the side wall of the connecting piece (15). A fixing nut (18) is also provided at the connection between the outer surface of the connecting piece (15) and the adjusting rod (17). The adjusting rod (17) and the fixing nut (18) are connected by a screw connection.

8. The automatic cable-following device for tower cranes according to claim 7, characterized in that: The connector (15) has an overall inverted U-shaped structure.

9. The automatic cable-following device for tower cranes according to claim 1, characterized in that: One end of the rotating pin (12) is provided with a pull ring (19), and the other end of the rotating pin (12) is provided with a fixing member.

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