Remote control I-beam hanger

Abstract

This invention discloses a remote-controlled I-beam lifting device, relating to the field of lifting and hoisting technology. It aims to solve the problems of high labor intensity and high operational risks associated with manually dismantling I-beam lifting slings at heights. The invention includes a drive mechanism, a clamping mechanism, a control mechanism, an anti-torsion mechanism, and a remote controller. The motor of the drive mechanism meshes with the driven gear of the clamping mechanism via a drive gear, thereby driving a bidirectional screw to rotate. The bidirectional screw is threadedly connected to the lead screw beams on the left and right jaws, converting the rotational motion into the opening and closing action of the jaws to clamp or release the I-beam. The anti-torsion mechanism is attached to the I-beam via a guide shaft under the linear bearing mounting plate and a strong magnet at the bottom, preventing torsion when the lifting device is released. This technical solution is used for remote-controlled hoisting and automatic detachment of I-beams, realizing remote ground operation of high-altitude work, effectively reducing the labor intensity of workers, and improving safety and operational efficiency.

Description

Technical Field

[0001] This invention relates to the field of lifting and hoisting technology, specifically to a remote-controlled I-beam lifting device. Background Technology

[0002] I-beams are widely used in steel structure construction. They are typically hoisted by directly tying steel wire ropes and shackles to the I-beams. After hoisting into place, construction workers climb to the middle of the steel beam to manually release the shackles and remove the hoisting slings.

[0003] After the beams and columns of a steel structure building are in place and connected, the shackles and wire ropes on the I-beams are usually still quite high off the ground. To remove the shackles and wire ropes, construction workers typically need to climb from both ends of the I-beam to the middle before manually dismantling it. I-beams are generally narrow and have long spans, making manual dismantling at heights not only labor-intensive and inefficient, but also posing significant safety risks.

[0004] Currently, H-beam lifting slings are structurally divided into two types: contour lifting slings and jaw lifting slings. Contour lifting slings use two horizontal clamps to hold the sides of the H-beam flange, and are fixed with bolts using a top connecting plate. This type of H-beam lifting sling has poor adaptability; one type of sling can only be used for one size of H-beam. Dismantling still requires manual unscrewing of the fixing bolts and loosening of the clamps to remove the lifting sling. Jaw lifting slings use two jaws that close to hold the H-beam. A connecting block is installed in the jaws, and a two-way screw is inserted into the arc-shaped threaded surface of the connecting block. Tightening the screw tightens the two jaws. This type of H-beam lifting sling still requires manual operation for locking and unlocking, posing a significant safety risk when dismantling lifting slings for H-beams suspended at high altitudes.

[0005] To address the practical difficulties in lifting and installing steel structure I-beams, especially in high-altitude disassembly and wire rope operations, it is essential to design a special lifting tool for remotely dismantling I-beams. Summary of the Invention

[0006] The technical problem to be solved and the technical task proposed by this invention is to improve and refine existing technical solutions, and to provide a remotely controllable opening and clamping I-beam lifting sling, so as to reduce construction labor intensity, reduce operational risks, save lifting operation time, and improve construction production efficiency, thereby effectively improving the convenience and safety of dismantling I-beam lifting slings. To achieve the above objectives, this invention adopts the following technical solution.

[0007] A remote-controlled I-beam lifting device, characterized in that it includes a drive mechanism, a clamping mechanism, a control mechanism, an anti-torsion mechanism, and a remote controller for wirelessly controlling the operation of the drive mechanism; the drive mechanism is connected to the clamping mechanism to drive the clamping mechanism to operate.

[0008] The drive mechanism includes a motor and a drive gear connected to the output shaft of the motor;

[0009] The clamping mechanism includes a driven gear meshing with the drive mechanism, a bidirectional screw driven by the driven gear (221) to rotate, and two jaws symmetrically arranged on the left and right. The jaws are provided with lead screw beams, and the two ends of the bidirectional screw are threadedly connected to the lead screw beams on the two jaws.

[0010] The anti-torsion mechanism includes a linear bearing mounting plate connected to the clamping mechanism, linear bearings installed vertically at both ends of the linear bearing mounting plate, a guide shaft inserted in the linear bearing, a spring between the guide shaft and the linear bearing, and a strong magnet fixed at the bottom of the guide shaft; the length direction of the linear bearing mounting plate is perpendicular to the bidirectional screw.

[0011] The rotation of the double-acting screw drives the lead screw beam to move along the axis of the double-acting screw, thereby causing the jaws on both sides to deflect and clamp or release the I-beam. When the jaws are clamped, the double-acting screw and the lead screw beam are locked together by threads. The threaded locking design between the double-acting screw and the lead screw beam makes the clamping more secure and less prone to loosening when the jaws are clamped, thus enhancing the load-bearing capacity and stability of the jaws clamping the I-beam.

[0012] The lifting device's opening and closing actions are controlled via remote control, allowing construction workers to operate it without direct contact. This is particularly suitable for high-altitude, long-distance, or other inconvenient work environments. Using a motor as the drive unit, the opening and closing of the lifting device's grippers is automated, reducing the high intensity and risk associated with manual operation and making the lifting device more efficient and reliable. The clamping mechanism, through the engagement of the driven and driven components and the rotation of the bidirectional screw, achieves synchronous movement of the lead screw beam along the axis of the bidirectional screw, thereby driving the opening and closing of the grippers fixed to the lead screw beam. This allows the lifting device to open and close the I-beam, resulting in a compact structure and ensuring stability and reliability during the opening and closing process.

[0013] The specialized lifting sling for I-beams achieves automated control through remote operation, enabling the slings to automatically detach from the suspended object at high altitudes or in inaccessible locations. This not only reduces the burden on workers climbing to heights but also avoids the safety risks associated with working at heights. Traditionally, workers had to manually climb to heights to perform heavy and dangerous tasks such as untying and dismantling slings; the application of this lifting sling completely changes this situation, making these originally labor-intensive tasks easy and simple, greatly reducing the physical burden on workers. Working at heights and directly dismantling slings both pose high safety risks. The remote operation and automated control functions of the remote-controlled I-beam lifting sling effectively reduce the time workers are exposed to hazardous environments, lowering the risk of accidents caused by human error or environmental factors, thereby improving the overall safety of the operation. The automation and remote control features allow this lifting sling to quickly respond to operating commands and complete the dismantling of the I-beam slings, significantly saving operation time and improving construction efficiency compared to traditional manual methods. Because this lifting sling significantly reduces labor intensity, lowers operational risks, and saves time, it directly improves construction efficiency. Construction teams can complete lifting tasks faster, reducing time wasted waiting or dealing with safety issues, thus accelerating project progress. The design of this lifting sling fully considers the needs of actual construction, making the dismantling process more convenient and efficient. Furthermore, its automation and remote control functions further enhance the safety of the dismantling process, providing more reliable protection for the construction team.

[0014] The driving component can be a gear or a worm gear to achieve the driving function.

[0015] A strong magnet at the bottom of the guide shaft firmly attaches it to the I-beam. After the I-beam is in place, the grippers maintain their relative position when releasing the beam, preventing twisting and snagging on the beam, which would hinder the spreader's detachment. Once the spreader is off the beam, the guide shaft springs back to its original position. Linear bearings and magnets maintain the relative position of the grippers and I-beam during release, ensuring safer and more reliable detachment. The design is space-saving, operates smoothly, is easy to install, and uses standard parts for easy maintenance and replacement. The linear bearing mounting plate is positioned perpendicular to the bidirectional screw, with linear bearings and guide shafts installed at both ends. This ensures the line connecting the two guide shafts is perpendicular to the bidirectional screw axis, maximizing the distance (lever arm). When the lifting device experiences a torsional tendency around the bidirectional screw axis due to load, this mechanism creates a torque with pressure on one side and tension on the other, balancing the torsional torque with the maximum lever arm, thus significantly enhancing anti-torsion stability and reliability. The symmetrical double-point support structure distributes the anti-torsion force evenly on both sides of the base, improving the overall structural stability and service life of the lifting device. Each guide shaft is equipped with an independent spring, allowing the strong magnets at both ends to move independently up and down. Even if the top surface of the I-beam flange is slightly tilted or uneven, the two strong magnets will simultaneously and tightly adhere under the action of the springs, ensuring the anti-torsion effect is not compromised.

[0016] As a preferred technical means: the drive mechanism further includes a motor mounting bracket, on which the motor is mounted, the output shaft of the motor extends out of the motor mounting bracket, the output shaft is connected to a drive gear as a drive member, and the drive gear meshes with a driven gear as a driven member; the clamping mechanism base is provided below the motor mounting bracket.

[0017] As a preferred technical means: the clamping mechanism further includes a base with a slot in the middle for meshing the drive gear and the driven gear. The driven gear is installed in the middle position of the bidirectional screw. The base is provided with a bearing mounting base, and the bidirectional screw is inserted into the bearing.

[0018] The base can be used to support the motor mounting bracket. Bearings are installed in the base at both ends of the base, and the double-acting screw is installed in the base through the bearings. The base has a slot in the middle, and the driven gear meshes with the drive gear through the slot. The driven gear is fixed in the middle position of the double-acting screw.

[0019] As a preferred technical means: the clamping mechanism further includes a jaw part, each jaw is composed of two gripping plates, the two gripping plates are fixed together by a bushing and rivets, the lead screw beam is fixed between the two gripping plates, the two jaws are rotatably connected by the top lifting ring spacer sleeve, and the left and right jaws can rotate around the axis of the lifting ring spacer sleeve.

[0020] The lead screw crossbeam is located between two gripper plates and can be used to fix the front and rear gripper plates of the clamp. A threaded hole is provided in the middle of the lead screw crossbeam. The rotation of the bidirectional screw drives the lead screw crossbeam to move laterally, and the lead screw crossbeam then drives the clamp to deflect. As a connecting intermediate component, the lead screw crossbeam converts rotational motion into linear motion, offering advantages such as compact structure, smooth operation, high movement accuracy and stability, thus improving the reliability of the entire transmission mechanism.

[0021] Each gripper on one side consists of two gripping plates fixed together by a bushing, and the gripping plates and bushings are secured with rivets. The left and right grippers are connected at the top by a lifting ring spacer sleeve, and the gripping plates and lifting ring spacer sleeve are secured with rivets. The lifting ring spacer sleeve has an arc-shaped groove in the middle for threading the steel wire rope. The grippers are fixedly connected to the anti-torsion mechanism via a base.

[0022] The single-sided gripper is composed of two gripping plates that are fixed together, with the actuator placed in the middle. The overall structure is compact and highly integrated, effectively protecting the actuator components from external damage. The two gripping plates on the front and back of the single-sided gripper increase the gripping points on the I-beam, preventing the weakness of single-point gripping and avoiding the safety risk of the gripper detaching from the I-beam.

[0023] As a preferred technical means: the outer side of the gripper is arc-shaped, and its inner bottom has an upwardly inclined U-shaped groove. The bottom of the U-shaped groove has an arc-shaped protrusion, and the two sides of the arc-shaped protrusion are concave arc transition edges. The U-shaped groove is used to clamp the flange of the I-beam, and the top opening is used to insert the lifting ring spacer. The middle part of the lifting ring spacer has an arc-shaped groove for threading the steel wire rope. The gripper has an opening for connecting the bushing. The two grippers on one side are fixed by the bushing, and the two grippers on the left and right sides are connected by the lifting ring spacer.

[0024] The arc-shaped gripper design helps avoid stress concentration when the gripper is under load, resulting in a more rational structural design. The U-shaped groove with an upward-sloping opening effectively clamps the I-beam flange, preventing slippage and ensuring the I-beam doesn't fall off during transport. The arc-shaped protrusion and its concave transition edges evenly distribute stress across the entire gripper, rather than concentrating it at localized corners. This reduces the risk of cracking or deformation due to prolonged stress or impact loads, extending the gripper's lifespan. It also ensures structural stability during hoisting, preventing safety hazards caused by structural failure and preventing cracks from appearing at the transition edges after long-term use. This extends the gripper's structural lifespan, ensures long-term hoisting reliability, and prevents jamming with the I-beam flange.

[0025] As a preferred technical means: the control mechanism includes a control box mounting bracket and a control box mounted on the control box mounting bracket. The control box contains a controller and a battery. The left side of the control box is a sensor mounting bracket. Two Hall proximity switch sensors are mounted on the sensor mounting bracket by sensor fixing nuts. The sensing magnet that triggers the Hall proximity switch sensor is mounted on the end of the bidirectional screw.

[0026] Integrating the remote receiver, motor controller, and battery into the control box reduces external wiring, making the entire control mechanism more compact and streamlined. The enclosed control box protects the delicate components from external elements such as rain and dust, ensuring reliable and normal operation. Concentrating all critical components in one unit facilitates maintenance and replacement, reducing maintenance costs and time. The built-in battery powers the remote receiver and motor controller, eliminating the need for an external power supply and enhancing the device's independence and portability.

[0027] As a preferred technical means: the controller has a built-in remote control signal receiving module and a motor control module. The remote control signal receiving module is connected to the remote control wirelessly. The motor control module receives signals from the remote control and sensor signals, and then controls the battery to switch the motor on and off.

[0028] As a preferred technical means: the sensor mounting bracket is installed on the lead screw beam and moves synchronously with the lead screw beam. The sensor mounting bracket is slotted along the axis of the bidirectional screw to adjust the installation position of the Hall proximity switch sensor. When the clamping mechanism is in the clamping state of the I-beam, the position directly above the induction magnet installed at the end of the bidirectional screw is the installation position of the outer Hall proximity switch sensor; when the clamping mechanism is in the loosened state of the I-beam, the position directly above the induction magnet installed at the end of the bidirectional screw is the installation position of the inner Hall proximity switch sensor.

[0029] Hall effect proximity sensors can detect the gripper's state. When the gripper is clamped, the outer Hall effect proximity sensor 1 is directly above the induction magnet. This triggers a signal from the outer Hall effect proximity sensor 1, causing the motor controller to shut off the motor power. This prevents the operator from continuing to remotely control the motor, which could damage the threads on the bidirectional screw and the lead screw beam, avoiding gear breakage and motor overheating. As the gripper slowly opens and the lead screw beam moves outward, the outer Hall effect proximity sensor 1 moves away from the induction magnet, while the inner Hall effect proximity sensor 2 moves closer. When the inner Hall effect proximity sensor 2 moves directly above the induction magnet, it triggers a signal, indicating the gripper is now released. This shuts off the motor power, preventing the operator from continuing to remotely control the motor and causing the lead screw beam to slip out of the bidirectional screw. These sensors monitor the gripper's clamping status, ensuring the safety of automatically dismantling the gripper.

[0030] The sensor mounting bracket's limiting groove is parallel to the axis of the bidirectional screw. For different types of I-beams, their cross-sectional widths vary, and the included angle between the two jaws changes depending on the width of the I-beam's cross-section. Therefore, the positions of Hall effect proximity switches 1 and 2 need to be adjusted to ensure correct operation when the jaws loosen or tighten. By mounting the sensor through the groove in the sensor bracket, the sensor position can be flexibly adjusted to accommodate different types of I-beams using lifting tools, improving the adaptability and flexibility of the lifting tools.

[0031] As a preferred technical means: the linear bearing mounting plate is fixed to the bottom of the base, and the linear bearing is provided on the linear bearing mounting plate on the outer side of the base; a limiting ring is provided at the top of the guide shaft, the spring is located between the limiting ring and the linear bearing mounting plate, and the guide shaft extends downward out of the linear bearing mounting plate.

[0032] The linear bearing mounting plate is fixed to the bottom of the base, embedding the entire anti-torsion mechanism within the main structure of the lifting device without occupying additional space. The arrangement of linear bearings on both sides, compared to single bearings or single-point supports, effectively resists the rotational torque generated during lifting device operation, preventing the mechanism itself from swaying and ensuring the reliability of the anti-torsion mechanism. The design of the spring located between the limit ring and the linear bearing mounting plate allows the guide shaft to continue compressing the spring upwards after the strong magnet contacts the surface of the I-beam. This compensates for unevenness or slight tilting of the I-beam flange surface, ensuring that the bottom surface of the strong magnet remains firmly attached. Simultaneously, the spring's cushioning effect absorbs minor impacts generated during lifting, protecting the magnet and workpiece surface.

[0033] As a preferred technical means: the left and right threaded sections of the bidirectional screw are opposite threads, the middle section is a cylindrical section, and a raised shoulder is provided at the intersection of the threaded section and the cylindrical section.

[0034] The bidirectional screw has opposite threaded sections on the left and right sides, and a cylindrical section in the middle. A raised shoulder is provided at the intersection of the threaded and cylindrical sections. The bidirectional screw is threadedly connected to the lead screw beams of the two side grippers. The design of the opposite threads allows the bidirectional screw to rotate, simultaneously causing the left and right grippers to deflect towards the center, thus clamping the I-beam. When the bidirectional screw rotates in opposite directions, it simultaneously causes the left and right grippers to deflect to the sides, thus releasing the I-beam. The cylindrical section in the middle is used to install bearings and driven gears. The shoulder design has a limiting function to prevent operator error from causing the grippers to continuously close and damage mechanical parts.

[0035] In summary, the beneficial effects of the present invention are as follows:

[0036] The I-beam lifting device of this invention can be remotely operated, allowing it to automatically detach from the suspended object at high altitudes. This eliminates the need for workers to manually climb to high places to dismantle the lifting slings, significantly reducing labor intensity, lowering operational risks, saving lifting time, improving construction efficiency, and effectively enhancing the convenience and safety of dismantling the lifting device. It is applicable to different models of I-beams, improving the versatility of the I-beam lifting device. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the state of the present invention for hoisting I-beams;

[0038] Figure 2 This is a schematic diagram of the state of the I-beam clamping device of the present invention;

[0039] Figure 3 This is a schematic diagram of the state of the I-beam lifting tool of the present invention for releasing the I-beam;

[0040] Figure 4 This is a schematic diagram of the structure of the remote-controlled I-beam lifting device of the present invention;

[0041] Figure 5 This is a schematic diagram of the drive mechanism of the present invention;

[0042] Figure 6 This is a schematic diagram of the clamping mechanism of the present invention;

[0043] Figure 7 This is a schematic diagram of the control mechanism of the present invention;

[0044] Figure 8 This is a schematic diagram of the anti-torsion mechanism of the present invention.

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. I-beams;

[0047] 21. Drive mechanism; 22. Clamping mechanism; 23. Control mechanism; 24. Anti-torsion mechanism;

[0048] 211. Motor; 212. Drive gear; 213. Motor mounting bracket;

[0049] 221. Driven gear; 222. Base; 223. Double-acting screw; 224. Bearing; 225. Lifting eye spacer; 226. Grip plate; 227. Lead screw crossbeam; 228. Bushing; 229. Rivet;

[0050] 231. Control box mounting bracket; 232. Control box; 233. Controller; 234. Battery; 235. Sensor mounting bracket; 236. Hall effect proximity switch sensor; 237. Sensor fixing nut; 238. Induction magnet;

[0051] 241. Linear bearing mounting plate; 242. Linear bearing; 243. Guide shaft; 244. Spring; 245. Strong magnet;

[0052] 3. Hook;

[0053] 4. Steel wire rope. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0055] Example 1:

[0056] Please see Figures 1 to 8 This embodiment provides a remote-controlled I-beam lifting device, which includes a drive mechanism 21, a clamping mechanism 22, a control mechanism 23, an anti-torsion mechanism 24, and a remote controller. The drive mechanism 21 meshes with the driven gear of the clamping mechanism 22 through a gear. The drive mechanism is located inside the clamping mechanism. At the same time, the remote controller is connected to the drive mechanism wirelessly and controls the drive mechanism to open and close the jaws on both sides of the clamping mechanism. After the remote controller sends a signal, the drive mechanism starts, which drives the bidirectional screw 223 of the clamping mechanism to rotate. The left and right threads of the bidirectional screw drive the lead screw beam 227 to move axially, thereby enabling the clamping mechanism to clamp or release the I-beam 1 without manual operation, which is automatic, efficient, and convenient.

[0057] Specifically, the drive mechanism includes a motor mounting bracket 213, on which a motor 211 is mounted. A drive gear 212 is mounted on the output shaft of the motor 211. The drive gear 212 meshes with the driven gear 221 of the clamping mechanism 22, which can drive the gripper of the clamping mechanism 22 to rotate, thereby achieving the clamping or releasing of the I-beam 1. At the same time, the bottom of the motor mounting bracket 213 is fixedly connected to the base 222 of the clamping mechanism 22.

[0058] The clamping mechanism 22 includes a base 222 with a slot in the middle for meshing of the driven gear 221 and the drive gear 212. Mounting bases for bearings 224 are provided at both ends. A bidirectional screw 223 is inserted into the bearings, with a cylindrical section in the middle and threaded sections on the left and right. The driven gear 221 is fixed at the middle position of the cylindrical section of the bidirectional screw 223. When the control motor 211 starts, the drive gear 212 drives the driven gear 221, causing the bidirectional screw 223 to rotate. The threads on the bidirectional screw 223 rotate, thereby driving the lead screw beams 227 in the two clamping jaws to move outward synchronously along the axis of the bidirectional screw 223, controlling the two clamping jaws to deflect outward, thus releasing the I-beam. Conversely, the lead screw beams 227 in the two clamping jaws move inward synchronously along the axis of the bidirectional screw 223, controlling the two clamping jaws to deflect inward, thus closing and clamping the I-beam. The two grippers are fixedly connected to each other by two gripping plates 226 through bushings 228 and rivets 229. The outer side of the gripping plate 226 is arc-shaped, and the bottom of its inner side has an upward U-shaped groove. The bottom of the U-shaped groove has an arc-shaped protrusion, and the two sides of the arc-shaped protrusion are concave arc transition edges. The U-shaped groove clamps the flange of the I-beam. The top of the gripping plate 226 has a round hole for fixing the lifting ring spacer 225. The left and right grippers are rotatably connected to the rivets 229 through the top lifting ring spacer 225, so that the left and right grippers can rotate around the axis of the lifting ring spacer 225. The middle part of the lifting ring spacer 225 has an arc-shaped groove for hanging the steel wire rope.

[0059] The control mechanism 23 includes a control box mounting bracket 231, which is fixed to the base 222. A control box 232 is mounted on the bracket 231. The control box 232 contains a controller 233 and a battery 234. The controller 233 integrates a remote control receiver and a motor controller. The motor controller is connected to the motor 211 and controls its operation. The remote control receiver is wirelessly connected to the remote control and receives command signals from the remote control to control the motor controller, thereby controlling the motor 211. The controller 233 also has indicator lights to display the battery level and power on / off status, providing a clear view of the lifting device's operating status and improving operational safety. The controller 233 is connected to Hall effect proximity sensors 236 via wires. It is a long cylindrical shape, with two Hall effect proximity sensors 236 mounted along the axis of the bidirectional screw. The sensor mounting bracket 235 has a slot in the middle, with the slot direction aligned with the axis of the bidirectional screw 223. The Hall proximity switch sensor 236 is secured to the slot in the sensor mounting bracket 235 by two sensor fixing nuts 237. The sensing magnet 238, used to trigger the Hall proximity switch sensor, is mounted on the end of the bidirectional screw. The positions of the two Hall proximity switch sensors 236 within the slot are determined by the positions of the sensing magnet 238 in the clamped and unclamped states. When the clamp is clamped, the position directly above the sensing magnet 238 is the mounting position of the outer Hall proximity switch sensor; when the clamp is unclamped, the position directly above the sensing magnet 238 is the mounting position of the inner Hall proximity switch sensor. The slot in the sensor mounting bracket 235 allows for easy adjustment of the mounting position of the Hall proximity switch sensor 236, enabling it to adapt to different models and specifications of I-beams. When the gripper is clamping the I-beam, the sensing magnet 238 is directly below the outer Hall proximity switch sensor 236, triggering the outer Hall proximity switch sensor signal. This signal indicates that the gripper is in the clamped position. The signal is transmitted to the controller 233, which cuts off the power to the motor 211 and transmits the signal to the remote control display screen in the operator's hand. When the gripper is releasing the I-beam, the sensing magnet 238 is directly below the inner Hall proximity switch sensor 236, triggering the inner Hall proximity switch sensor signal. This signal indicates that the gripper is in the released position. The signal is transmitted to the controller 233, which cuts off the power to the motor 211 and transmits the signal to the remote control display screen in the operator's hand.

[0060] It should be noted that the remote control, as a switching device, is not shown in the accompanying drawings of this application. When in use, it is held in the hand of the operator to control the clamping or loosening of the lifting device. The principle of its remote control adopts existing technology.

[0061] The anti-torsion mechanism 24 includes a linear bearing mounting plate 241, which is fixed to the bottom of the base 222 to ensure that the entire clamping mechanism and the anti-torsion mechanism are reliably fixed. The middle part has a slot for the driven gear 221 to pass through, and the two ends have holes for installing the linear bearing 242. The line connecting the two holes is parallel to the length direction of the clamped I-beam 1. A guide shaft 243 is installed inside the linear bearing 242. A limiting ring with a diameter larger than the linear bearing hole is provided on the top of the guide shaft 243 to prevent the guide shaft 243 from slipping out of the linear bearing 242. A spring 244 is installed between the limiting ring of the guide shaft 243 and the bottom surface of the linear bearing 242 for the guide shaft 243 to spring back and reset. A strong magnet 245 is installed at the bottom of the guide shaft. When the clamping mechanism 22 clamps the I-beam 1, the strong magnet 245 at the bottom of the guide shaft 243 will be firmly attracted to the surface of the I-beam 1. When the clamping mechanism 22 releases the I-beam 1, the strong magnet 245 is still attracted to the surface of the I-beam, which can prevent the clamping mechanism from being relatively twisted, thereby avoiding the jaws from accidentally getting caught on the I-beam and ensuring that the lifting device can be released smoothly.

[0062] It should be noted that the remote control receiver module of controller 233 transmits information with the transmitter in the remote control of the ground operator, so that the high-altitude lifting equipment can receive the power on / off, release or clamping commands issued by the ground operator, and feed back parameters such as the clamping status and power level to the remote control terminal for display. The transmitting and receiving devices used for remote control comply with the relevant safety standards for industrial remote control anti-interference and anti-malfunction.

[0063] The process of using the remote-controlled I-beam lifting device of this invention is as follows:

[0064] 1. Adjust the position of the inner and outer Hall proximity switch sensors 236 in the slot of the sensor mounting bracket 235 according to the cross-sectional dimensions of the hoisted I-beam 1.

[0065] 2. Determine the lifting point position based on the length of the I-beam 1 to be lifted, generally at one-third to two-thirds of the length of the I-beam 1. Place the remote-controlled I-beam lifting tool at lifting point 1 and operate the remote control to issue a clamping command. At this time, the motor 211 rotates forward, and the motor 211 drives the drive gear 212 to rotate. The drive gear 212 drives the driven gear 221 mounted on the double-acting screw 223 to rotate. The driven gear 221 then drives the double-acting screw 223 to rotate. The rotation of the double-acting screw 223 drives the thread to rotate. Since the lead screw beam 227 is threadedly connected to the double-acting screw 223 and the thread directions of the left and right threaded sections are opposite, the lead screw beams 227 on both sides will move inward synchronously along the axis of the double-acting screw 223. The lead screw beams 227 on both sides are fixed on the jaws on both sides respectively. The jaws on both sides are connected at the top through the lifting ring spacer 225. Therefore, the jaws on both sides will deflect inward at the same time, completing the clamping action of the I-beam 1. At this time, the induction magnet 238 is located directly below the outer Hall proximity switch sensor 236, triggering the outer Hall proximity switch sensor 236 to emit a signal. The motor controller then shuts off the power and simultaneously feeds back the clamping status signal to the operator's remote control. The operation at lifting point 2 is similar.

[0066] 3. After the I-beam 1 is clamped, the guide shaft of the anti-torsion mechanism 24 moves downward under the action of magnetic force, and the strong magnet 245 at the bottom is firmly attached to the surface of the I-beam 1. Then, the wire rope 4 on the crane hook and the hook 3 are threaded onto the lifting ring spacer 225 to complete the connection between the lifting device and the lifting equipment.

[0067] 4. After confirming that the lifting equipment is stable and secure, the signal is normal, and the surrounding environment is safe, direct the lifting personnel to lift and install the I-beam 1 to the installation position, thus completing the placement of the I-beam 1.

[0068] 5. Once the I-beam 1 is confirmed to be in place, the operator issues a release command via remote control. When motor 211 reverses, the lead screw beams 227 on both sides will move outward synchronously along the axis of the bidirectional screw 223, thereby causing the grippers on both sides to deflect outward simultaneously, completing the release action of the I-beam 1. Due to the anti-torsion mechanism 24, the position of the lifting device relative to the I-beam 1 remains unchanged after the I-beam 1 is released. At this time, the induction magnet 238 is located directly below the inner Hall proximity switch sensor 236, triggering the inner Hall proximity switch sensor 236 to send a signal. The motor controller shuts off the power and simultaneously feeds back the release status signal to the operator's remote control.

[0069] 6. After confirming that the lifting sling is in the detached state, direct the lifting personnel to disengage from the lifting sling and complete the automatic dismantling of the slings.

[0070] In summary, the remote-controlled I-beam lifting device of the present invention, through the perfect cooperation of the actuator and the control mechanism, can easily complete the dismantling of slings at high altitudes without requiring construction personnel to climb onto the I-beam to dismantle the slings. This greatly improves the efficiency of lifting operations, effectively reduces the labor intensity of construction personnel, avoids dangerous high-altitude operations for construction personnel, significantly improves construction safety, and the device is also applicable to I-beams of different models and specifications, improving the device's versatility.

[0071] Example 2:

[0072] The similarities with Example 1 will not be repeated here; the differences are as follows:

[0073] In addition to using the meshing of the drive gear 212 and the driven gear 221 to achieve transmission, the meshing of the worm gear and the worm can also be used to achieve transmission.

[0074] The remote-controlled I-beam lifting device shown above is a specific embodiment of the present invention, which embodies the substantial features and progress of the present invention. Based on the actual needs of use, equivalent modifications in shape, structure, etc., can be made to it according to the inspiration of the present invention, and all such modifications are within the scope of protection of this solution.

Claims

1. A remote-controlled I-beam lifting device, characterized in that: It includes a drive mechanism (21), a clamping mechanism (22), a control mechanism (23), an anti-torsion mechanism (24), and a remote controller for wirelessly controlling the operation of the drive mechanism (21); the drive mechanism is connected to the clamping mechanism to drive the clamping mechanism (22) to operate; The drive mechanism includes a motor (211) and a drive gear (212) connected to the output shaft of the motor (211). The clamping mechanism (22) includes a driven gear (221) meshing with the driving mechanism, a bidirectional screw (223) driven to rotate by the driven gear (221), and two jaws symmetrically arranged on the left and right. The jaws are provided with a lead screw beam (227), and the two ends of the bidirectional screw (223) are threadedly connected to the lead screw beam (227) on the jaws on both sides. The anti-torsion mechanism (24) includes a linear bearing mounting plate (241) connected to the clamping mechanism (22), and linear bearings (242) installed vertically at both ends of the linear bearing mounting plate (241). A guide shaft (243) is inserted into the linear bearing (242), and a spring (244) is provided between the guide shaft (243) and the linear bearing (242). A strong magnet (245) is fixed at the bottom of the guide shaft. The length direction of the linear bearing mounting plate (241) is perpendicular to the bidirectional screw (223). Two Hall effect proximity sensors (236) are mounted on a sensor mounting bracket (235) via sensor fixing nuts (237). The sensing magnet (238) that triggers the Hall effect proximity sensor (236) is mounted on the end of the bidirectional screw (223). The sensor mounting bracket (235) is mounted on a lead screw beam (227) and moves synchronously with the lead screw beam (227). The sensor mounting bracket (235) has a slot along the axis of the bidirectional screw (223) for adjustment. The installation position of the Hall proximity switch sensor (236) is as follows: when the clamping mechanism (22) is clamping the I-beam, the position directly above the induction magnet (238) installed at the end of the bidirectional screw (223) is the installation position of the outer Hall proximity switch sensor (236); when the clamping mechanism (22) is releasing the I-beam, the position directly above the induction magnet (238) installed at the end of the bidirectional screw (223) is the installation position of the inner Hall proximity switch sensor (236).

2. The remote-controlled I-beam lifting device according to claim 1, characterized in that: The drive mechanism also includes a motor mounting bracket (213), on which the motor (211) is mounted. The output shaft of the motor (211) extends out of the motor mounting bracket (213), and the output shaft is connected to a drive gear (212) which serves as a drive member. The drive gear (212) meshes with a driven gear (221) which serves as a driven member. The clamping mechanism base (222) is located below the motor mounting bracket (213).

3. The remote-controlled I-beam lifting device according to claim 1, characterized in that: The clamping mechanism also includes a base (222), with a slot in the middle for meshing the drive gear and the driven gear (221). The driven gear (221) is installed in the middle of the bidirectional screw (223). The base (222) has a mounting base for a bearing (224), and the bidirectional screw (223) is inserted into the bearing.

4. The remote-controlled I-beam lifting device according to claim 1, characterized in that: Each gripper is composed of two gripping plates (226), which are fixed together by a bushing (228) and a rivet (229). The lead screw beam (227) is fixed between the two gripping plates (226). The two grippers are rotatably connected by a top lifting ring spacer (225), and the left and right grippers can rotate around the axis of the lifting ring spacer.

5. A remote-controlled I-beam lifting device according to claim 4, characterized in that: The outer side of the gripper is arc-shaped, and the bottom of its inner side has an upwardly sloping U-shaped groove. The bottom of the U-shaped groove has an arc-shaped protrusion, and the two sides of the arc-shaped protrusion are concave arc transition edges. The U-shaped groove is used to clamp the flange of the I-beam, and the top opening is used to insert the lifting ring spacer sleeve. The middle part of the lifting ring spacer sleeve has an arc-shaped groove for threading the steel wire rope.

6. The remote-controlled I-beam lifting device according to claim 1, characterized in that: The control mechanism (23) includes a control box mounting bracket (231) and a control box (232) mounted on the control box mounting bracket (231). The control box (232) contains a controller (233) and a battery (234). The left side of the control box (232) is a sensor mounting bracket (235).

7. A remote-controlled I-beam lifting device according to claim 6, characterized in that: The controller has a built-in remote control signal receiving module and a motor control module. The remote control signal receiving module is connected to the remote control wirelessly. The motor control module receives signals from the remote control and sensor signals, and then controls the battery (234) to switch the motor (211) on and off.

8. A remote-controlled I-beam lifting device according to claim 3, characterized in that: The linear bearing mounting plate (241) is fixed below the base (222), and the linear bearing (242) is provided on the linear bearing mounting plate (241) on the outside of the base (222); the top of the guide shaft (243) is provided with a limiting ring, and the spring is located between the limiting ring and the linear bearing mounting plate (241). The guide shaft (243) extends downward out of the linear bearing mounting plate (241).

9. A remote-controlled I-beam lifting device according to claim 1, characterized in that: The left and right threaded sections of the bidirectional screw (223) are opposite threads, and the middle section is a cylindrical section. A raised shoulder is provided at the intersection of the threaded section and the cylindrical section.

Images