Composite drive heavy load telescopic beam spreader for crane and remote control method

Abstract

The present application relates to the technical field of industrial hoisting, and discloses a composite driving heavy-load telescopic beam lifting appliance for a crane and a remote control method, which comprises hydraulic devices installed on the front and back of a fixed frame and a rotating mechanism installed on the top of the fixed frame. The gear and the gear groove are engaged to drive the fixed frame to move when the fixed frame is offset after clamping the heavy object, so that the sliding plate and the counterweight plate move to the direction of the lifting hook under the gear drive, thereby keeping the center of gravity of the lifting appliance consistent with the center of gravity of the lifting hook, and the lifting appliance itself remains stable, reducing the situation that the lifting appliance is not at the center of gravity of the heavy object due to inaccurate positioning after the lifting appliance clamps the heavy object under the operation of the staff, thereby causing the center of gravity of the lifting appliance to be different from that of the lifting hook after clamping, the heavy object swings when being lifted, and the lifting appliance is inclined and worn. The stability of the lifting appliance during work is ensured, and the quality of the device during lifting work of the heavy object is improved.

Description

Technical Field

[0001] This invention relates to the field of industrial hoisting technology, and in particular to a composite drive heavy-duty telescopic beam hoisting device for cranes and a remote control method thereof. Background Technology

[0002] In the hoisting operations of heavy components, large containers, prefabricated components, and steel structure modules, the telescopic beam spreader with composite drive relies on the telescopic sub-beam to adjust the span of the hoisting point, adapting to workpieces of various specifications, and is a commonly used key tooling for cranes.

[0003] During the use of this lifting device, the device is first connected to the hook and moved above the load. At this time, the composite-driven telescopic beam opens outward. Then, the entire lifting device moves down and is placed on the outside of the load. After placement, the operator remotely controls the hydraulic device to drive the telescopic beam to retract. The load is centered and aligned using the positioning plates on both sides. The load is then clamped and fixed by the fixing strips. However, after clamping the load, the hydraulic device and the lifting device are prone to misalignment, which can easily cause the clamping center of gravity to shift. This can cause the load to sway and swing during lifting and transport, exacerbating wear on the lifting device and affecting its stability and the effectiveness of transporting heavy loads. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose a composite drive heavy-duty telescopic beam lifting device for cranes and a remote control method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A composite drive heavy-duty telescopic beam lifting device for cranes includes: hydraulic devices installed on the front and back of a fixed frame, and a rotating mechanism installed on the top of the fixed frame; The fixing frame is used to clamp heavy objects by a hydraulic device, and vertical slots are opened on both its left and right sides. The hydraulic system includes an electrical control box, a telescopic beam, and a lifting assembly; The electrical box is fixedly connected to the top of one of the hydraulic devices, and the output end of the electrical box is connected to the internal wiring of the two hydraulic devices. The rotating mechanism includes a drive assembly, a limit assembly, and a stabilizing assembly; The drive assembly is installed on top of the hydraulic device, away from the electrical box. The drive assembly drives the limit assembly to move along the top of the fixed frame through the built-in components, so that the stabilizing component and the counterweight plate move in the same direction. When the fixed frame shifts from the center of gravity of the hook after clamping the heavy object, the stabilizing component and the counterweight plate will move towards the hook.

[0006] As a further embodiment of the present invention, the telescopic beam is slidably assembled inside the hydraulic device, and positioning plates are fixedly installed on both the left and right sides of the telescopic beam. Fixing strips are slidably connected to the opposite sides of the two positioning plates to realize the positioning and clamping of the heavy object.

[0007] As a further embodiment of the present invention, the lifting assembly is assembled on the top of the fixed frame. The lifting assembly includes a rotating ring, a connecting rod, and lifting lugs. The connecting rod is fixedly connected to the outer surface of the rotating ring, and a plurality of lifting lugs for lifting and docking are fixedly provided at the top of the connecting rod.

[0008] As a further embodiment of the present invention, the drive assembly includes a support frame, a motor, a connecting belt, a rotating shaft, and a gear. The support frame is fixedly connected to the top of the hydraulic device away from the electrical box, and the motor is fixedly connected to the top of the support frame.

[0009] As a further embodiment of the present invention, a connecting belt is provided at the bottom output end of the motor, and a rotating shaft is provided on the inner wall of the end of the connecting belt away from the support frame. A gear is fixedly connected to the outer surface of the rotating shaft. The bottom of the gear is fixedly connected to the top of the fixed frame, and the gear is driven by a motor.

[0010] As a further embodiment of the present invention, the limiting component is slidably connected to the sliding plate on the top of the fixed frame, as well as the arc groove and toothed groove inside the sliding plate. Arc grooves are provided on both the left and right sides of the sliding plate, and toothed grooves are provided in the middle of the sliding plate. The toothed grooves are provided through the sliding plate. The teeth of the tooth groove mesh with the outer surface of the gear, and the middle part of the arc groove is aligned with the bottom of the vertical groove.

[0011] As a further embodiment of the present invention, the stabilizing component includes a sliding block, a rotating rod, a pushing rod, and a moving block. The sliding block is slidably connected to the bottom of the vertical groove, and the rotating rod is rotatably connected to the outer surface of the sliding block. The middle parts of the two rotating rods are rotatably connected to the two side walls of the sliding plate, respectively.

[0012] As a further embodiment of the present invention, the two rotating rods are rotatably connected to the inner sides of each other, and the outer surface of the pushing rod is slidably connected to a moving block; The bottoms of the two moving blocks are slidably connected to the top of the sliding plate.

[0013] As a further embodiment of the present invention, a counterweight plate is fixedly connected between the two moving blocks, and a placement groove is provided on the top of the counterweight plate; The inner wall of the placement groove is slidably connected to the outer surface of the rotating ring.

[0014] A remote control method for a crane's composite drive heavy-duty telescopic beam lifting device includes the following steps: Step 1: During operation, first precisely align the lifting lug at the top of the spreader with the crane hook. The operator then starts the crane, using the hook to smoothly and precisely move the entire spreader above the object to be lifted. Step 2: The staff operates the electrical box to drive the two sets of hydraulic devices to push the telescopic beam to extend to both sides through the internal mechanical structure. At the same time, the staff controls the crane to slowly move the lifting device down, so that the opened telescopic beam and the lifting device are fitted onto the outside of the heavy object, thus completing the loading of the heavy object. Step 3: After the load is placed, the hydraulic device controlled by the electrical box drives the telescopic beam to retract. During the retraction of the telescopic beam, the positioning plates on both sides are aligned with the load to complete the alignment and calibration. The fixing strips are used to clamp and fix the load, so that the load is stably connected to the lifting device. Step 4: When the center of gravity of the hook deviates during the clamping process of the fixed frame, the motor drives the gear to rotate through the connecting belt and rotating shaft. The gear meshes and drives the sliding plate to move in the opposite direction of the fixed frame along the vertical center of gravity of the hook. With the help of the arc groove, rotating rod and push rod, the counterweight plate slides to finely adjust the position of the lifting lug, ensuring that it is coaxial and perpendicular to the hook. At the same time, the moved counterweight plate and the sliding plate and the fixed frame maintain a stable posture around the lifting lug. Step 5: After the center of gravity is corrected, the crane will lift the lifting equipment and the load smoothly. After the lifting is stable, the motor will reverse and reset, driving all transmission structures, counterweight plates and rotating rings back to the reference position, reducing the swaying of the load and the wear of the lifting equipment, and ensuring stable and efficient lifting operations.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this application, the gear and toothed gear meshing transmission causes the sliding plate and counterweight plate to move towards the hook under gear transmission when the fixed frame shifts after clamping the heavy object. This ensures that the center of gravity of the lifting device is consistent with the center of gravity of the hook, and the lifting device itself remains stable. This reduces the possibility that the lifting device may not be positioned at the center of gravity of the heavy object after being clamped by the operator of the crane, which would cause the center of gravity of the lifting device to be different from that of the hook, resulting in the heavy object swinging during lifting and causing the lifting device to tilt and wear. This ensures the stability of the lifting device during operation and improves the quality of the device when lifting heavy objects. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention; Figure 2 This is a diagram showing the connection relationship of the lifting components of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention; Figure 3 This is a schematic diagram showing the position of the drive component of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention. Figure 4 This is a diagram showing the connection relationship of the drive components of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention. Figure 5 This is a diagram showing the connection relationship of the limiting components of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention; Figure 6 This is a schematic diagram showing the position of the stabilizing components of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention. Figure 7 This is a diagram showing the connection relationship of the stabilizing components of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention. Figure 8 This is a schematic diagram showing the position of the counterweight plate of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention; Figure 9 This is a schematic diagram of the rotating mechanism of a composite drive heavy-duty telescopic beam lifting device for cranes proposed in this invention.

[0017] In the diagram: 100, fixed frame; 110, vertical groove; 200, hydraulic device; 210, electrical box; 220, telescopic beam; 221, positioning plate; 222, fixing strip; 230, lifting assembly; 231, rotating ring; 232, connecting rod; 233, lifting lug; 300, rotating mechanism; 310, drive assembly; 311, support frame; 312, motor; 313, connecting belt; 314, rotating shaft; 315, gear; 320, limiting assembly; 321, sliding plate; 322, arc groove; 323, tooth groove; 330, stabilizing assembly; 331, sliding block; 332, rotating rod; 333, push rod; 334, moving block; 400, counterweight plate; 410, placement groove. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0019] A composite drive heavy-duty telescopic beam lifting device for cranes includes: a hydraulic device 200 installed on the front and back of a fixed frame 100, and a rotating mechanism 300 installed on the top of the fixed frame 100. The fixing frame 100 is used to clamp the heavy object by the hydraulic device 200, and vertical slots 110 are opened on both its left and right sides. The hydraulic device 200 includes an electrical box 210, a telescopic beam 220, and a hoisting assembly 230; The electrical box 210 is fixedly connected to the top of one of the hydraulic devices 200, and the output end of the electrical box 210 is connected to the internal wiring of the two hydraulic devices 200. The rotating mechanism 300 includes a drive assembly 310, a limit assembly 320, and a stabilizing assembly 330; The drive assembly 310 is installed on the top of the hydraulic device 200, which is far away from the electrical box 210. The drive assembly 310 drives the limiting assembly 320 to move along the top of the fixed frame 100 through the built-in components, so that the stabilizing assembly 330 and the counterweight plate 400 move in the same direction. When the fixed frame 100 shifts from the center of gravity of the hook after clamping the heavy object, the stabilizing assembly 330 and the counterweight plate 400 will move towards the hook.

[0020] The telescopic beam 220 is slidably assembled inside the hydraulic device 200. Positioning plates 221 are fixedly installed on both the left and right sides of the telescopic beam 220. Fixing strips 222 are slidably connected to the opposite sides of the two positioning plates 221 to realize the positioning and clamping of the heavy object.

[0021] The lifting assembly 230 is assembled on the top of the fixed frame 100. The lifting assembly 230 includes a rotating ring 231, a connecting rod 232 and lifting lugs 233. The outer surface of the rotating ring 231 is fixedly connected to the connecting rod 232, and the top end of the connecting rod 232 is fixedly provided with multiple lifting lugs 233 for lifting and docking.

[0022] The drive assembly 310 includes a support frame 311, a motor 312, a connecting belt 313, a rotating shaft 314, and a gear 315. The support frame 311 is fixedly connected to the top of the hydraulic device 200, which is away from the electrical box 210, and the motor 312 is fixedly connected to the top of the support frame 311.

[0023] A connecting belt 313 is sleeved on the bottom output end of the motor 312. A rotating shaft 314 is sleeved on the inner wall of the end of the connecting belt 313 away from the support frame 311. A gear 315 is fixedly connected to the outer surface of the rotating shaft 314. The bottom of gear 315 is fixedly connected to the top of the fixed frame 100, and the gear is driven by motor transmission.

[0024] The limiting component 320 is slidably connected to the sliding plate 321 on the top of the fixed frame 100, as well as the arc groove 322 and tooth groove 323 inside the sliding plate 321. The sliding plate 321 has arc grooves 322 on both the left and right sides, and tooth groove 323 in the middle of the sliding plate 321. The tooth groove 323 is provided through the sliding plate 321. The teeth of the tooth groove 323 mesh with the outer surface of the gear 315, and the middle part of the arc groove 322 is aligned with the bottom position of the vertical groove 110.

[0025] The stabilizing component 330 includes a sliding block 331, a rotating rod 332, a pushing rod 333, and a moving block 334. The sliding block 331 is slidably connected to the bottom of the vertical groove 110, and the rotating rod 332 is rotatably connected to the outer surface of the sliding block 331. The middle parts of the two rotating rods 332 are rotatably connected to the two side walls of the sliding plate 321, respectively.

[0026] The two rotating rods 332 are rotatably connected to the push rod 333 on their respective inner sides, and the outer surface of the push rod 333 is slidably connected to the moving block 334; The bottoms of the two movable blocks 334 are slidably connected to the top of the sliding plate 321.

[0027] A counterweight plate 400 is fixedly connected between the two movable blocks 334, and a placement slot 410 is provided on the top of the counterweight plate 400. The inner wall of the placement groove 410 is slidably connected to the outer surface of the rotating ring 231.

[0028] A remote control method for a crane's composite drive heavy-duty telescopic beam lifting device includes the following steps: Step 1: During operation, first precisely align the lifting lug 233 at the top of the lifting device with the crane hook. The operator starts the crane and uses the hook to move the entire lifting device smoothly and precisely above the object to be lifted. Step 2: The staff operates the electrical box 210 to drive the two sets of hydraulic devices 200 to operate, pushing the telescopic beam 220 to extend to both sides through the internal mechanical structure. At the same time, the staff controls the crane to slowly move the lifting device down, so that the opened telescopic beam 220 and the lifting device are fitted onto the outside of the heavy object, thus completing the installation of the heavy object. Step 3: After the load is set up, the hydraulic device 200 is controlled by the electrical box 210 to drive the telescopic beam 220 to retract. During the retraction of the telescopic beam 220, the positioning plates 221 on both sides are aligned with the load to complete the alignment and calibration. The fixing strip 222 is used to clamp and fix the load, so that the load is stably connected to the lifting device. Step 4: When the center of gravity of the hook shifts during the clamping process of the fixed frame 100, the motor 312 drives the gear 315 to rotate through the connecting belt 313 and the rotating shaft 314. The gear 315 is driven to rotate and mesh, which drives the sliding plate 321 to move in the opposite direction of the vertical center of gravity of the hook towards the fixed frame 100. With the help of the arc groove 322, the rotating rod 332 and the push rod 333, the counterweight plate 400 is driven to slide and finely adjust the position of the lifting lug 233 to ensure that it is coaxial and perpendicular to the hook. At the same time, the counterweight plate 400 and the sliding plate 321 maintain a stable posture around the lifting lug 233 with the fixed frame 100 after the movement. Step 5: After the center of gravity is corrected, the crane will lift the lifting equipment and the load smoothly. After the lifting is stable, the motor 312 will reverse and reset, driving all transmission structures, counterweight plate 400 and rotating ring 231 back to the reference position, reducing the swaying of the load and the wear of the lifting equipment, and ensuring stable and efficient lifting operations.

[0029] like Figures 1-3As shown, in use, the lifting device is first connected to the crane hook via the top lifting lug 233. Then, the operator starts the crane, which moves the lifting device above the heavy object via the hook. Subsequently, the operator operates the electrical box 210 on the top of the hydraulic device 200. The electrical box 210 drives the two sets of hydraulic devices 200 to operate. The hydraulic power pushes the mechanical components inside the telescopic beam 220 to extend to both sides. While the telescopic beam 220 extends, the entire lifting device slowly moves down with the crane to complete the wrapping of the heavy object. Then, the electrical box 210 drives the hydraulic device 200 to retract the telescopic beam 220. When the telescopic beam 220 retracts, the positioning plate 221 on the side wall contacts the heavy object and positions it. Then, the fixing strip 222 fixes the heavy object. The heavy object, after being fixed by the lifting device, will be lifted and moved to the designated position by the crane.

[0030] like Figures 4-9As shown, during the process of the hydraulic device 200 driving the telescopic beam 220 to extend and retract and complete the clamping and fixing of the heavy object, because the center of gravity of the heavy object is not on the same vertical line as the center of gravity of the lifting device and the hook, the fixed frame 100 and the hydraulic device 200 will experience positional displacement after clamping the heavy object. This causes the center of gravity of the lifting device and the center of gravity of the crane hook to be unable to maintain the same vertical line, resulting in a displacement of the center of gravity of the lifting device. At this time, the motor 312 located on the support frame 311 runs, and the output end of the motor 312 is driven by the connecting belt 313 to drive the rotating shaft 314 to rotate on the top of the fixed frame 100. When 14 rotates, it synchronously drives gear 315 to rotate. When gear 315 rotates, it drives sliding plate 321 to move in the opposite direction of offset from fixed frame 100 through the tooth groove 323 that meshes with it. When sliding plate 321 moves, its arc groove 322 can guide and limit sliding block 331, so that sliding block 331 rotates along arc groove 322 and slides upward along vertical groove 110 of fixed frame 100. When sliding block 331 moves, it drives the connected rotating rod 332 to rotate. The other end of rotating rod 332 pushes moving block 334 through push rod 333, so that moving block 334... 334 slides along the top of the sliding plate 321 in the same direction as the sliding plate 321. When the moving block 334 slides, it will drive the counterweight plate 400 to slide at the bottom of the rotating ring 231, thereby driving the rotating ring 231, connecting rod 232 and lifting lug 233 to make slight adjustments to their positions, always ensuring that the lifting lug 233 and the crane hook are on the same vertical line. During this process, the fixed frame 100 and the hydraulic device 200 will have a small positional compensation offset when clamped. At the same time, the counterweight plate 400 slides in the opposite direction of the hook's center of gravity offset towards the fixed frame 100, so that the overall center of gravity of the lifting device coincides with the center of gravity of the hook, thus lifting the heavy object. The device maintains stability during lifting. After lifting the load, the motor 312 reverses and resets, driving the transmission structure, counterweight plate 400, fixed frame 100, and rotating ring 231 back to the reference position. This ensures that the lifting device and hook remain coaxial, reducing the risk of wear and tear caused by inaccurate positioning of the lifting device after it clamps the load, which could result in the load swinging during lifting and causing the lifting device to tilt. This ensures the stability of the lifting device during operation and improves the quality of lifting heavy objects.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A composite drive heavy-duty telescopic beam lifting device for cranes, characterized in that, include: Hydraulic devices (200) are installed on the front and back of the fixed frame (100), and a rotating mechanism (300) is installed on the top of the fixed frame (100). The fixing frame (100) is used to clamp heavy objects by means of a hydraulic device (200), and vertical slots (110) are provided on both its left and right sides. The hydraulic device (200) includes an electrical box (210), a telescopic beam (220), and a hoisting assembly (230). The electrical box (210) is fixedly connected to the top of one of the hydraulic devices (200), and the output end of the electrical box (210) is connected to the internal wiring of the two hydraulic devices (200). The rotating mechanism (300) includes a drive assembly (310), a limiting assembly (320), and a stabilizing assembly (330). The drive assembly (310) is installed on the top of the hydraulic device (200) away from the electrical box (210). The drive assembly (310) drives the limiting assembly (320) to move along the top of the fixed frame (100) through the built-in components, so that the stabilizing assembly (330) and the counterweight plate (400) move in the same direction. When the fixed frame (100) shifts from the center of gravity of the hook after clamping the heavy object, the stabilizing assembly (330) and the counterweight plate (400) will move towards the hook.

2. The composite drive heavy-duty telescopic beam lifting device for cranes according to claim 1, characterized in that, The telescopic beam (220) is slidably assembled inside the hydraulic device (200). Positioning plates (221) are fixedly installed on both the left and right sides of the telescopic beam (220). Fixing strips (222) are slidably connected to the opposite sides of the two positioning plates (221) to realize the positioning and clamping of the heavy object.

3. A composite drive heavy-duty telescopic beam lifting device for cranes according to claim 2, characterized in that, The lifting assembly (230) is mounted on the top of the fixed frame (100). The lifting assembly (230) includes a rotating ring (231), a connecting rod (232) and lifting lugs (233). The outer surface of the rotating ring (231) is fixedly connected to the connecting rod (232), and the top end of the connecting rod (232) is fixedly provided with a plurality of lifting lugs (233) for lifting and docking.

4. A composite drive heavy-duty telescopic beam lifting device for cranes according to claim 3, characterized in that, The drive assembly (310) includes a support frame (311), a motor (312), a connecting belt (313), a rotating shaft (314), and a gear (315). The support frame (311) is fixedly connected to the top of the hydraulic device (200) away from the electrical box (210), and the top of the support frame (311) is fixedly connected to the motor (312).

5. A composite drive heavy-duty telescopic beam lifting device for cranes according to claim 4, characterized in that, The bottom output end of the motor (312) is fitted with a connecting belt (313), and a rotating shaft (314) is fitted on the inner wall of the end of the connecting belt (313) away from the support frame (311). A gear (315) is fixedly connected to the outer surface of the rotating shaft (314). The bottom of the gear (315) is fixedly connected to the top of the fixed frame (100), and the gear is driven by motor transmission.

6. A composite drive heavy-duty telescopic beam lifting device for cranes according to claim 2, characterized in that, The limiting component (320) is slidably connected to the sliding plate (321) on the top of the fixed frame (100), as well as the arc groove (322) and tooth groove (323) inside the sliding plate (321). The sliding plate (321) has arc grooves (322) on both the left and right sides, and tooth grooves (323) in the middle of the sliding plate (321). The tooth grooves (323) are provided through the sliding plate (321). The teeth of the tooth groove (323) mesh with the outer surface of the gear (315), and the middle part of the arc groove (322) is aligned with the bottom position of the vertical groove (110).

7. A composite drive heavy-duty telescopic beam lifting device for cranes according to claim 6, characterized in that, The stabilizing component (330) includes a sliding block (331), a rotating rod (332), a pushing rod (333), and a moving block (334). The sliding block (331) is slidably connected to the bottom of the vertical groove (110), and the rotating rod (332) is rotatably connected to the outer surface of the sliding block (331). The middle parts of the two rotating rods (332) are rotatably connected to the two side walls of the sliding plate (321).

8. A composite drive heavy-duty telescopic beam lifting device for cranes according to claim 7, characterized in that, The two rotating rods (332) are rotatably connected to the push rod (333) on their respective inner sides, and the outer surface of the push rod (333) is slidably connected to the moving block (334). The bottoms of the two movable blocks (334) are slidably connected to the top of the sliding plate (321).

9. A composite drive heavy-duty telescopic beam lifting device for cranes according to claim 8, characterized in that, A counterweight plate (400) is fixedly connected between the two movable blocks (334), and a placement slot (410) is provided on the top of the counterweight plate (400). The inner wall of the placement groove (410) is slidably connected to the outer surface of the rotating ring (231).

10. A remote control method for a composite drive heavy-duty telescopic beam lifting device for cranes, characterized in that: The method of using any one of the composite drive heavy-duty telescopic beam lifting devices for cranes as described in claims 1 to 9 includes the following steps: S1: Equipment positioning: During operation, first precisely connect the lifting lug (233) at the top of the lifting device with the crane hook. The staff starts the crane and uses the hook to drive the entire lifting device to move smoothly and precisely above the object to be lifted. S2: Lowering the lifting device to cover the load: The operator controls the electrical box (210) to drive the two sets of hydraulic devices (200) to operate, push the telescopic beam (220) to extend to both sides through the internal mechanical structure, and at the same time control the crane to drive the lifting device to slowly move down, so that the opened telescopic beam (220) and the lifting device are covered on the outside of the load, thus completing the covering of the load. S3: Precise clamping and fixing: After the heavy object is set up, the hydraulic device (200) is controlled by the electrical box (210) to drive the telescopic beam (220) to retract. During the retraction of the telescopic beam (220), the positioning plates (221) on both sides are attached to the heavy object to complete the alignment and calibration. The fixing strip (222) is used to clamp and fix the heavy object, so that the heavy object is stably connected to the lifting device. S4: Automatic correction and posture stabilization: When the fixed frame (100) deviates from the center of gravity of the hook during the clamping process, the motor (312) drives the gear (315) to rotate through the connecting belt (313) and the rotating shaft (314), which meshes and drives the sliding plate (321) to move in the opposite direction along the vertical center of gravity of the hook. With the help of the arc groove (322), the rotating rod (332) and the push rod (333) transmission, the counterweight plate (400) slides to finely adjust the position of the lifting lug (233) to ensure that it is coaxial and vertical with the hook. At the same time, the counterweight plate (400) and the sliding plate (321) and the fixed frame (100) maintain a stable posture around the lifting lug (233) after the movement. S5: Lifting and Reset Operation: After the center of gravity is corrected, the crane will lift the lifting device and the heavy object smoothly. After the lifting is stable, the motor (312) will reverse and reset, driving each transmission structure, counterweight plate (400) and rotating ring (231) back to the reference position, alleviating the swing of the heavy object and the wear of the lifting device, and ensuring the stable and efficient lifting operation.

Images