Crane sling and control system

Abstract

The invention relates to the technical field of crane accessories, in particular to a crane sling and a control system. The hoisting device comprises a hoisting frame connected with a hoisting mechanism of the crane. Through the structural design of the carrying butt joint mechanism and the auxiliary mechanism, the lifting frame and the lifting connector can be rapidly connected through the device, the device can adapt to different lifting hooks, lifting rings or lifting suction cups, a lifting appliance can be normally used according to different lifting operation requirements, the application range of the device is greatly widened, and the device is suitable for popularization and application. Through the structural design of the second-stage positioning mechanism, the device can conduct secondary positioning on the hoisting connector, torsion and shaking are prevented in the heavy object hoisting process, the control system reduces sudden hoisting accidents through parameterized intelligent control, passive protection is converted into active prevention by introducing closed-loop feedback, and the safety of hoisting is improved. The technical effect is improved, and the safety specification of hoisting equipment is met.

Description

Technical Field

[0001] This invention relates to the field of crane accessories technology, and in particular to a crane lifting device and control system. Background Technology

[0002] Cranes are multi-action lifting machinery, capable of vertically lifting heavy objects and horizontally moving them within a certain range. They are also known as overhead cranes, gantry cranes, and hoists. The concept of a crane mentioned here emphasizes the lifting mechanism used for hoisting heavy objects. When lifting packaged items, the most commonly used lifting tools are hooks and slings. In addition, lifting rings, lifting suction cups, clamps, and forks are also available. Because cranes are widely used in the lifting and hoisting industry, they are usually used in conjunction with lifting tools to facilitate the lifting of objects.

[0003] For example, a loading and unloading device and method for a multi-functional crane, with publication (announcement) number CN117263004A, includes: a crane trolley for being connected to the beam drive of the multi-functional crane and moving along the beam under the drive of the beam drive; a lifting device for being connected to the crane trolley; a first control circuit for being electrically connected to the crane trolley and the lifting device; a hydraulic grab for being electrically connected to the first control circuit, the first control circuit being used to control the hydraulic grab to unload goods; a second control circuit for being electrically connected to the crane trolley and the lifting device; and a tilting spreader for being electrically connected to the second control circuit, the second control circuit being used to control the tilting spreader to tilt containers and load goods.

[0004] In summary, the following technical problems exist in the existing technology: Although the existing technology can flip containers and load goods by flipping the spreader during use, for diverse lifting operations, there are also operation methods that use lifting tools such as hooks, lifting rings or lifting suction cups. The existing technology is not convenient for quickly switching and connecting with the corresponding tools. Therefore, we propose a crane spreader and control system. Summary of the Invention

[0005] The purpose of this invention is to provide a crane lifting device and control system to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A crane lifting device includes a lifting frame connected to a crane lifting mechanism. A lifting connector for connecting to a hook, a lifting ring, or a lifting suction cup is mounted on the lower part of the lifting frame. A connecting frame is fixed to the bottom of the lifting frame. A cylindrical body is fixed to the inner side of the connecting frame. A mounting docking mechanism is mounted on the inner side of the cylindrical body for connecting to the lifting connector.

[0008] Preferably, the mounting and docking mechanism includes a drive component and a transmission component. The drive component is mounted on the inner side of the cylinder, and the transmission component is mounted between the drive component and the hoisting connector.

[0009] Preferably, the drive assembly includes a hydraulic rod, a docking cylinder, a power rod, a lever, and a limiting post. The hydraulic rod is fixed to the top of the cylinder. The output end of the hydraulic rod passes through the inner side of the cylinder and is fixed to a power rod. The docking cylinder is slidably connected to the outer side of the power rod. The docking cylinder is fixed to the cylinder. A lever is fixed to one end of the power rod. Both ends of the lever are equipped with limiting posts. The limiting posts are slidably connected to the inner side of the docking cylinder.

[0010] Preferably, both ends of the lever are integrally fixed with cylindrical heads, and the top of each limiting post is provided with a through-hole corresponding to the position of the cylindrical head, and the through-hole is slidably connected to the cylindrical head.

[0011] Preferably, the transmission assembly includes a guide limiting head, a spiral groove, a locking protrusion, and an annular ring. Both ends of the docking cylinder are fixed with guide limiting heads. The outer sides of the limiting posts are provided with spiral grooves, and the two spiral grooves are centrally symmetrical along the central axis of the docking cylinder. One end of each guide limiting head penetrates the inner side of the docking cylinder and is slidably connected to the spiral groove. The bottom edge of each limiting post is integrally fixed with a locking protrusion. The top of the hoisting connector is fixed with an annular ring. The distance between the surfaces of the two limiting posts is equal to the diameter of the annular ring.

[0012] Preferably, an inner annular recess is provided on the inner side of the annular ring, and an auxiliary mechanism is assembled between the lever and the inner annular recess.

[0013] Preferably, the auxiliary mechanism includes a rectangular groove, a first force-applying rack, a central gear, a second force-applying rack, a transmission rod, a positioning rotary column, a semi-circular groove, and a triangular force-applying frame. The bottom of the docking cylinder has a rectangular groove. The inner side of the rectangular groove is slidably connected to the first and second force-applying racks. One end of the first force-applying rack is fixed to a lever. A central gear meshes between the first and second force-applying racks. The central gear is rotatably connected to the rectangular groove via a shaft. One end of the second force-applying rack is fixed to a transmission rod. The outer side of the transmission rod is slidably connected to a positioning rotary column. The top of the positioning rotary column is fixed to the docking cylinder. The bottom of the positioning rotary column has a semi-circular groove. Both ends of the inner side of the semi-circular groove are rotatably connected to triangular force-applying frames. One end of the transmission rod is assembled and connected to the triangular force-applying frame.

[0014] Preferably, a support rod is provided on the inner side of one end of the transmission rod, and an arc-shaped protrusion and an elliptical protrusion are fixed at both ends of the triangular force-applying frame, respectively. The arc-shaped protrusion is slidably connected to the support rod, and the elliptical protrusion is transitionally fitted to the inner side of the inner annular recess.

[0015] Preferably, both ends of the docking cylinder are fixed with L-shaped tie plates, and a base plate is fixed to the bottom of the two L-shaped tie plates. A secondary positioning mechanism is assembled between the base plate and the limiting post. The secondary positioning mechanism includes a mounting cylinder, toothed blocks, a transmission guide plate, a positioning fixing ring, a sealing ring, a hexagonal protrusion groove, a limiting clamping strip, a rectangular movable block, a spring, and a limiting guide cavity. The mounting cylinder is rotatably connected to the top of the base plate. Multiple toothed blocks are evenly distributed and fixed to the outer side of one of the limiting posts. The toothed blocks are all engaged with the top of the inner side of the mounting cylinder. A transmission guide plate is fixed to the inner side of the mounting cylinder. The transmission guide plate is rotatably connected to the base plate. The top of the base plate... A positioning ring is fixed inside the transmission guide plate. A sealing ring is fixed to the top of the positioning ring. A hexagonal protrusion groove is formed on the inner side of the transmission guide plate. Multiple limiting clamping strips are evenly distributed and slidably connected to the inner side of the top of the positioning ring. Each limiting clamping strip is slidably connected to the inner side of the hexagonal protrusion groove. A rectangular movable block is fixed to the top of each limiting clamping strip. A spring is fixed to one end of each rectangular movable block. Multiple limiting guide cavities corresponding to the positions of the rectangular movable blocks are evenly distributed at the bottom of the sealing ring. The limiting guide cavities are slidably connected to the rectangular movable blocks. The end of the spring away from the rectangular movable block is fixed to the end of the limiting guide cavity inside the limiting guide cavity.

[0016] A control system for a crane spreader, applicable to a crane spreader, comprising:

[0017] The hydraulic control module is used to adjust the advance amount at the output end of the hydraulic rod;

[0018] An angle sensing unit, installed on the limiting post, is used to monitor the torsion angle of the limiting post in real time;

[0019] The displacement sensing unit, mounted on the triangular force-applying frame, is used to monitor the movement amplitude or rotation angle of the elliptical protrusion.

[0020] The central processing unit is communicatively connected to the hydraulic control module, the angle sensing unit, and the displacement sensing unit, and is configured as follows:

[0021] The hydraulic rod is controlled to move according to the preset target value of the advance amount;

[0022] Receive and compare the real-time data of the torsion angle and the magnitude of movement with a preset threshold;

[0023] When the torsion angle deviates from the preset range, adjust the advance of the hydraulic rod;

[0024] When the movement of the elliptical protrusion reaches the target value, the hydraulic rod stops moving.

[0025] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0026] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0027] 1. The present invention, through its structural design incorporating a docking mechanism and an auxiliary mechanism, facilitates the quick connection of the lifting frame with the lifting connector, and can be adapted to different hooks, lifting rings or lifting suction cups. This allows for the normal use of lifting tools according to different lifting operation requirements, greatly expanding the applicability of the device.

[0028] 2. Through the structural design of the two-stage positioning mechanism, this invention enables the device to perform secondary positioning of the hoisting connector, preventing twisting and swaying during the hoisting of heavy objects, and improving the safety and stability of hoisting operations.

[0029] 3. The control system of the present invention transforms mechanical advantages into quantifiable and replicable technical functions through parameterized intelligent control, forming a core technical barrier that combines high efficiency, safety and adaptability, reducing sudden hoisting accidents, and transforming passive protection into active prevention by introducing closed-loop feedback through the control system, thereby achieving a qualitative improvement in technical effect and complying with the safety specifications for lifting equipment. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the connection structure of the lifting frame and the lifting connector of the present invention;

[0033] Figure 3 This is a cross-sectional structural diagram of the cylinder and the connecting cylinder of the present invention;

[0034] Figure 4 This is a schematic diagram of the connection structure between the power rod and the lever of the present invention;

[0035] Figure 5 This is a schematic diagram of the connection structure between the cylindrical head and the through-hole of the present invention;

[0036] Figure 6 This is a schematic diagram of the connection structure between the annular ring and the inner annular recess of the present invention;

[0037] Figure 7 This is a cross-sectional schematic diagram of the positioning rotary column and transmission rod of the present invention;

[0038] Figure 8 This is a schematic diagram of the connection structure between the substrate and the mounting cylinder of the present invention;

[0039] Figure 9 This is a cross-sectional view of the substrate and the mounting cylinder of the present invention;

[0040] Figure 10 This is a schematic diagram of the connection structure between the substrate and the positioning and fixing ring of the present invention;

[0041] Figure 11 This is a schematic diagram of the connection structure between the sealing ring and the limiting guide cavity of the present invention;

[0042] Figure 12 This is a schematic diagram of the connection structure between the hexagonal protrusion groove and the limiting clamping strip of the present invention.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] In the diagram: 1. Lifting frame; 2. Lifting connector; 3. Connecting frame; 4. Cylinder; 5. Hydraulic rod; 6. Connecting cylinder; 7. Power rod; 8. Lever; 9. Limiting post; 10. Through-hole; 11. Cylindrical head; 12. Guide limiting head; 13. Spiral groove; 14. Locking protrusion; 15. Annular ring; 16. Inner annular recess; 17. Rectangular groove; 18. First force-applying rack; 19. Central gear; 20. Second force-applying... 21. Rack; 22. Transmission rod; 23. Positioning rotary column; 24. Semicircular groove; 25. Triangular force-applying frame; 26. Support rod; 27. Arc-shaped protrusion; 28. Elliptical protrusion; 29. ​​Base plate; 30. Mounting cylinder; 31. Tooth block; 32. Transmission guide plate; 33. Positioning fixing ring; 34. Sealing ring; 35. Hexagonal protruding groove; 36. Limiting clamping strip; 37. Rectangular movable block; 38. Spring; 39. Limiting guide cavity. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] Example 1

[0047] Reference Figure 1-7A crane lifting device includes a lifting frame 1 connected to the crane lifting mechanism. A lifting connector 2 is mounted on the lower part of the lifting frame 1 and connected to a hook, lifting ring or lifting suction cup. A connecting frame 3 is fixed to the bottom of the lifting frame 1. A cylinder 4 is fixed to the inner side of the connecting frame 3. A mounting docking mechanism is mounted on the inner side of the cylinder 4. The mounting docking mechanism is used to connect with the lifting connector 2. In other embodiments, the bottom of the lifting connector 2 is also connected to a hydraulic grab hook, clamp, lifting beam and some non-standard lifting devices. The connection is fixed by fasteners or welding, which is convenient to adapt to the lifting operations of warehouses and storage yards with multiple types of goods.

[0048] The docking mechanism includes a drive assembly and a transmission assembly. The drive assembly is installed inside the cylinder 4, and the transmission assembly is installed between the drive assembly and the lifting connector 2. The drive assembly includes a hydraulic rod 5, a docking cylinder 6, a power rod 7, a lever 8, and a limiting post 9. The hydraulic rod 5 is fixed to the top of the cylinder 4. The output end of the hydraulic rod 5 passes through the inside of the cylinder 4 and is fixed to the power rod 7. The docking cylinder 6 is slidably connected to the outside of the power rod 7 and is fixed to the cylinder 4. The lever 8 is fixed to one end of the power rod 7, and both ends of the lever 8 are equipped with limiting posts 9. The limiting posts 9 are slidably connected to the inside of the docking cylinder 6. When the hydraulic rod 5 is activated, the output end of the hydraulic rod 5 pulls the power rod 7 upward, thereby causing the power rod 7 to drive the lever 8 to move synchronously.

[0049] Both ends of the lever 8 are integrally fixed with cylindrical heads 11. The top of the limiting post 9 is provided with a through-hole 10 corresponding to the position of the cylindrical head 11. The through-hole 10 is slidably connected to the cylindrical head 11. Most of the surface of the cylindrical head 11 is cylindrical. When the limiting post 9 rotates inside the docking cylinder 6, there will be no motion interference between the through-hole 10 and the cylindrical head 11.

[0050] The transmission assembly includes a guide limiting head 12, a spiral groove 13, a locking protrusion 14, and an annular ring 15. Guide limiting heads 12 are fixed at both ends of the docking cylinder 6. Spiral grooves 13 are opened on the outer side of the limiting posts 9, and the two spiral grooves 13 are centrally symmetrical along the central axis of the docking cylinder 6. One end of the guide limiting head 12 passes through the inner side of the docking cylinder 6 and is slidably connected to the spiral groove 13. The bottom edge of the limiting posts 9 is integrally fixed with a locking protrusion 14. An annular ring 15 is fixed on the top of the hoisting connector 2. The distance between the surfaces of the two limiting posts 9 is equal to the diameter of the annular ring 15. It can be understood that the difference between the diameter of the annular ring 15 and the diameter of the top of the hoisting connector 2 is equal to the length of the two locking protrusions 14.

[0051] An inner annular recess 16 is formed on the inner side of the annular ring 15. An auxiliary mechanism is assembled between the lever 8 and the inner annular recess 16. The auxiliary mechanism includes a rectangular groove 17, a first force-applying rack 18, a central gear 19, a second force-applying rack 20, a transmission rod 21, a positioning rotary column 22, a semi-circular groove 23, and a triangular force-applying frame 24. A rectangular groove 17 is formed at the bottom of the docking cylinder 6. The first force-applying rack 18 and the second force-applying rack 20 are slidably connected to the inner side of the rectangular groove 17. One end of the first force-applying rack 18 is fixed to the lever 8. A central gear 19 is meshed between the first force-applying rack 18 and the second force-applying rack 20. The central gear 19 is rotatably connected to the rectangular groove 17 through a shaft. One end of the second force-applying rack 20 is fixed to the transmission rod 21. The positioning rotary column 22 is slidably connected to the outer side of the transmission rod 21. The top of the rotating column 22 is fixed to the docking cylinder 6. A semi-circular groove 23 is provided at the bottom of the positioning rotating column 22. Both ends of the inner side of the semi-circular groove 23 are rotatably connected to the triangular force-applying frame 24. One end of the transmission rod 21 is assembled and connected to the triangular force-applying frame 24. When the hydraulic rod 5 is activated, the hydraulic rod 5 drives the power rod 7 and the lever 8 to move upward, which in turn causes the lever 8 to pull the first force-applying rack 18 to move upward. Because the first force-applying rack 18 is meshed with the central gear 19, and the central gear 19 is rotatably connected with the rectangular groove 17, the central gear 19 can mesh with the second force-applying rack 20 to move, so that the second force-applying rack 20 drives the transmission rod 21 to move inside the positioning rotating column 22.

[0052] A support rod 25 is provided on the inner side of one end of the transmission rod 21. An arc-shaped protrusion 26 and an elliptical protrusion 27 are fixed at both ends of the triangular force-applying frame 24, respectively. The arc-shaped protrusion 26 is slidably connected to the support rod 25, and the elliptical protrusion 27 is transitionally fitted to the inner side of the inner annular recess 16. When the second force-applying rack 20 pushes the transmission rod 21 downward, the transmission rod 21 pushes the arc-shaped protrusion 26 to move through the support rod 25. Because the triangular force-applying frame 24 is rotatably connected to the semi-circular groove 23, the two elliptical protrusions 27 can move in a direction away from each other. When the elliptical protrusion 27 is placed inside the annular ring 15, the two elliptical protrusions 27 can finally be stuck inside the inner annular recess 16, forming a vertical positioning of the hoisting connector 2.

[0053] Example 2

[0054] Further optimizations to Example 1, specifically, such as... Figure 8-12As shown, L-shaped tie plates are fixed at both ends of the docking cylinder 6. A base plate 28 is fixed at the bottom of the two L-shaped tie plates. A secondary positioning mechanism is assembled between the base plate 28 and the limiting post 9. The secondary positioning mechanism includes a mounting cylinder 29, toothed blocks 30, a transmission guide plate 31, a positioning fixing ring 32, a sealing ring 33, a hexagonal protrusion groove 34, a limiting clamping strip 35, a rectangular movable block 36, a spring 37, and a limiting guide cavity 38. The mounting cylinder 29 is rotatably connected to the top of the base plate 28. Multiple toothed blocks 30 are evenly distributed and fixed on the outer side of one of the limiting posts 9. The toothed blocks 30 are all meshed with the top of the inner side of the mounting cylinder 29. A transmission guide plate is fixed on the inner side of the mounting cylinder 29. A moving guide disk 31 is rotatably connected to a base plate 28. A positioning and fixing ring 32 is fixed on the top of the base plate 28, inside the transmission guide disk 31. A sealing ring 33 is fixed on the top of the positioning and fixing ring 32. A hexagonal protrusion groove 34 is formed on the inner side of the transmission guide disk 31. Multiple limiting clamping strips 35 are evenly distributed and slidably connected to the inner side of the top of the positioning and fixing ring 32. Each limiting clamping strip 35 is slidably connected to the inner side of the hexagonal protrusion groove 34. Multiple tangential grooves corresponding to the limiting clamping strips 35 are formed on the inner side of the hexagonal protrusion groove 34. The tangential grooves are slidably connected to one end of the limiting clamping strips 35, and the tangential grooves are arranged clockwise inclinations in the hexagonal protrusion groove 34. Inside; rectangular movable blocks 36 are fixed to the top of each limiting clamping bar 35, and springs 37 are fixed to one end of each rectangular movable block 36. Multiple limiting guide cavities 38, corresponding to the positions of the rectangular movable blocks 36, are evenly distributed at the bottom of the sealing ring 33. The limiting guide cavities 38 are slidably connected to the rectangular movable blocks 36. The end of the spring 37 away from the rectangular movable blocks 36 is fixed to the inner end of the limiting guide cavity 38. It can be understood that the inner sides of the base plate 28, the positioning and fixing ring 32, and the sealing ring 33 are all in clearance fit with the lifting connector 2. During the assembly and connection of the lifting frame 1 and the lifting connector 2, the limiting post 9 drives the toothed block 30 to mesh with and rotate the mounting cylinder 29, causing... The cylinder 29 drives the transmission guide disc 31 to rotate synchronously. Because the tangent groove is slidably connected to the limiting clamping strip 35 and the tangent groove is arranged at an angle, and the limiting clamping strip 35 is slidably connected to the positioning and fixing ring 32, and the rectangular movable block 36 is slidably connected to the limiting guide cavity 38, the tangent groove can push the limiting clamping strip 35 to move. The rectangular movable block 36 compresses the spring 37 to contract, thereby causing multiple limiting clamping strips 35 to move towards the center of the positioning and fixing ring 32 until multiple limiting clamping strips 35 come into contact with the surface of the lifting connector 2, thereby achieving secondary positioning and fixing of the lifting connector 2 and preventing twisting and shaking during the lifting process.

[0055] Example 3

[0056] A control system for a crane spreader, applicable to a crane spreader, comprising:

[0057] The hydraulic control module is used to adjust the advance amount at the output end of the hydraulic rod 5;

[0058] An angle sensing unit is installed on the limiting post 9 to monitor the torsion angle of the limiting post 9 in real time.

[0059] The displacement sensing unit, mounted on the triangular force-applying frame 24, is used to monitor the movement amplitude or rotation angle of the elliptical protrusion 27.

[0060] The central processing unit (CPU) is communicatively connected to the hydraulic control module, angle sensing unit, and displacement sensing unit. The CPU is configured as follows:

[0061] The hydraulic rod 5 is controlled to move according to the preset target value of the advance amount;

[0062] Receive and compare real-time data of torsion angle and movement amplitude with preset thresholds;

[0063] When the torsion angle deviates from the preset range, adjust the advance amount of the hydraulic rod 5;

[0064] When the movement of the elliptical protrusion 27 reaches the target value, the hydraulic rod 5 stops moving. In specific implementation, the control system includes the following components: a high-precision displacement sensor is installed at the output end of the hydraulic rod 5 for real-time measurement of the advance amount; an angle encoder is integrated on the top of the limit column 9 to monitor the torsion angle, ranging from 0° to 180° with an accuracy of ±1°; a miniature rotation sensor is installed at the arc-shaped protrusion 26 of the triangular force-applying frame 24 to record the rotation angle of the elliptical protrusion 27, with a target value of 45°.

[0065] The central processing unit uses an embedded microprocessor (such as an ARM Cortex-M7) to run a control algorithm: During initialization, hydraulic rod 5 is reset (advance = 0). The operator initiates the connection sequence through the interface, the central processing unit outputs a signal, and the hydraulic control module increases the advance at a constant rate (e.g., 5 mm / s). Simultaneously, the angle sensing unit transmits torsion angle data; when the angle reaches 45°, the system checks whether it is synchronized with the spiral groove 13. If the angle deviation exceeds 10% (e.g., 50° is detected but the preset angle is 45°), the microprocessor pauses the hydraulic rod, fine-tunes the pressure, and then continues.

[0066] When the torsion angle approaches 90° (locking protrusion 14 engages the annular ring 15), the displacement sensing unit monitors the movement of the elliptical protrusion 27. If the angle is less than 45°, the microprocessor increases the feed rate to 7 mm / s until the angle reaches the target. Throughout the process, if the torsion angle is greater than 150° or the elliptical protrusion angle is greater than 55°, the system triggers a safety protocol, stops the operation, and issues an alarm.

[0067] In this embodiment, the system achieved a 30% reduction in connection time and a 95% reduction in sway rate during testing, effectively improving the efficiency and safety of hoisting operations.

[0068] In summary:

[0069] This invention addresses the technical problem of existing technologies. While existing technologies can use flipping spreaders to flip containers and load goods, for diverse lifting operations, there are still methods that require the use of lifting tools such as hooks, lifting rings, or lifting suction cups. Existing technologies are not convenient for quickly switching and connecting to corresponding tools. The invention employs the technical solutions described in the above embodiments. Furthermore, the implementation process of the above technical solutions is as follows:

[0070] During use, when it is necessary to assemble and connect the lifting frame 1 and the lifting connector 2, first align the docking cylinder 6 vertically with the lifting connector 2, then place the annular ring 15 between the two limiting posts 9, and then start the hydraulic rod 5. The output end of the hydraulic rod 5 pulls the power rod 7 to move vertically, which in turn causes the power rod 7 to drive the lever 8 to move synchronously. Because the cylindrical head 11 is slidably connected to the through-hole 10, the limiting post 9 is slidably connected to the docking cylinder 6, and the guide limiting head 12 is slidably connected to the spiral groove 13, when the limiting post 9 is dragged upward by the cylindrical head 11, since the limiting post 9 is a rotating body and the spiral groove 13 is spiral, it can be rotated under the guidance of the guide limiting head 12. This allows the limiting post 9 to drive the locking protrusion 14 to rotate synchronously, so that one end of each locking protrusion 14 is in contact with the surface of the lifting connector 2. At this time, the two locking protrusions 14 just lock the annular ring 15, forming a stable connection.

[0071] With the above-mentioned settings, this application will certainly solve the above-mentioned technical problems, and at the same time achieve the following technical effects:

[0072] 1. Through the structural design of the docking mechanism and auxiliary mechanism, the present invention makes it easy to quickly connect the lifting frame 1 and the lifting connector 2, and can be adapted to different hooks, lifting rings or lifting suction cups, so as to make it easy to use the lifting tools normally according to different lifting operation requirements, which greatly improves the applicability of the device.

[0073] 2. Through the structural design of the two-stage positioning mechanism, this invention enables the device to perform secondary positioning of the lifting connector 2, preventing twisting and swaying during the lifting of heavy objects, and improving the safety and stability of the lifting operation.

[0074] 3. The control system of the present invention transforms mechanical advantages into quantifiable and replicable technical functions through parameterized intelligent control, forming a core technical barrier that combines high efficiency, safety and adaptability, reducing sudden hoisting accidents, and transforming passive protection into active prevention by introducing closed-loop feedback through the control system, thereby achieving a qualitative improvement in technical effect and complying with the safety specifications for lifting equipment.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A crane lifting device, characterized in that, The system includes a lifting frame (1) connected to the lifting mechanism of a crane. The lower part of the lifting frame (1) is equipped with a lifting connector (2) that is connected to a hook, lifting ring or lifting suction cup. A connecting frame (3) is fixed at the bottom of the lifting frame (1). A cylinder (4) is fixed on the inner side of the connecting frame (3). A mounting docking mechanism is installed on the inner side of the cylinder (4). The mounting docking mechanism is used to connect with the lifting connector (2).

2. A crane lifting device according to claim 1, characterized in that, The mounting and docking mechanism includes a drive component and a transmission component. The drive component is mounted on the inner side of the cylinder (4), and the transmission component is mounted between the drive component and the hoisting connector (2).

3. A crane lifting device according to claim 2, characterized in that, The drive assembly includes a hydraulic rod (5), a docking cylinder (6), a power rod (7), a lever (8), and a limiting post (9). The top of the cylinder (4) is fixed with a hydraulic rod (5). The output end of the hydraulic rod (5) passes through the inside of the cylinder (4) and is fixed with a power rod (7). The outside of the power rod (7) is slidably connected with the docking cylinder (6). The docking cylinder (6) is fixed to the cylinder (4). One end of the power rod (7) is fixed with a lever (8). Both ends of the lever (8) are equipped with limiting posts (9). The limiting posts (9) are slidably connected to the inside of the docking cylinder (6).

4. A crane lifting device according to claim 3, characterized in that, Both ends of the lever (8) are integrally fixed with cylindrical heads (11), and the top of the limiting post (9) is provided with a through hole (10) corresponding to the position of the cylindrical head (11), and the through hole (10) is slidably connected to the cylindrical head (11).

5. A crane lifting device according to claim 4, characterized in that, The transmission assembly includes a guide limiting head (12), a spiral groove (13), a locking protrusion (14), and an annular ring (15). Both ends of the docking cylinder (6) are fixed with guide limiting heads (12). The outer side of each limiting post (9) is provided with a spiral groove (13), and the two spiral grooves (13) are centrally symmetrical along the central axis of the docking cylinder (6). One end of each guide limiting head (12) passes through the inner side of the docking cylinder (6) and is slidably connected with the spiral groove (13). The bottom edge of each limiting post (9) is integrally fixed with a locking protrusion (14). The top of the hoisting connector (2) is fixed with an annular ring (15). The distance between the surfaces of the two limiting posts (9) is equal to the diameter of the annular ring (15).

6. A crane lifting device according to claim 5, characterized in that, The inner side of the annular ring (15) is provided with an inner annular recess (16), and an auxiliary mechanism is assembled between the lever (8) and the inner annular recess (16).

7. A crane lifting device according to claim 6, characterized in that, The auxiliary mechanism includes a rectangular groove (17), a first force-applying rack (18), a central gear (19), a second force-applying rack (20), a transmission rod (21), a positioning rotary column (22), a semi-circular groove (23), and a triangular force-applying frame (24). The bottom of the docking cylinder (6) is provided with a rectangular groove (17). The first force-applying rack (18) and the second force-applying rack (20) are slidably connected to the inner side of the rectangular groove (17). One end of the first force-applying rack (18) is fixed to the lever (8), and the first force-applying rack (18) and the second force-applying rack (20) are meshed together. There is a central gear (19), which is rotatably connected to a rectangular groove (17) via a shaft. One end of the second force-applying rack (20) is fixed with a transmission rod (21). A positioning rotary column (22) is slidably connected to the outside of the transmission rod (21). The top of the positioning rotary column (22) is fixed to the docking cylinder (6). A semi-circular groove (23) is opened at the bottom of the positioning rotary column (22). Both ends of the inner side of the semi-circular groove (23) are rotatably connected to a triangular force-applying frame (24). One end of the transmission rod (21) is assembled and connected to the triangular force-applying frame (24).

8. A crane lifting device according to claim 7, characterized in that, A support rod (25) is provided on the inner side of one end of the transmission rod (21). An arc-shaped protrusion (26) and an elliptical protrusion (27) are fixed at both ends of the triangular force-applying frame (24). The arc-shaped protrusion (26) is slidably connected to the support rod (25), and the elliptical protrusion (27) is transitionally fitted to the inner side of the inner annular recess (16).

9. A crane lifting device according to claim 5, characterized in that, Both ends of the docking cylinder (6) are fixed with L-shaped tie plates. A base plate (28) is fixed at the bottom of the two L-shaped tie plates. A secondary positioning mechanism is assembled between the base plate (28) and the limiting post (9). The secondary positioning mechanism includes a mounting cylinder (29), toothed blocks (30), a transmission guide plate (31), a positioning fixing ring (32), a sealing ring (33), a hexagonal protrusion groove (34), a limiting clamping strip (35), a rectangular movable block (36), a spring (37), and a limiting guide cavity (38). The top of the base plate (28) is rotatably connected to the mounting cylinder (29). Multiple toothed blocks (30) are evenly distributed and fixed on the outer side of one of the limiting posts (9). The toothed blocks (30) are all meshed with the top of the inner side of the mounting cylinder (29). The inner side of the mounting cylinder (29) is fixed with a transmission guide plate (31). The transmission guide plate (31) is rotatably connected to the base plate (28). The base plate (28) A positioning ring (32) is fixed at the top of the transmission guide plate (31) and at the inner side of the transmission guide plate (31). A sealing ring (33) is fixed at the top of the positioning ring (32). A hexagonal protrusion groove (34) is opened on the inner side of the transmission guide plate (31). Multiple limiting clamping strips (35) are evenly distributed and slidably connected to the inner side of the top of the positioning ring (32). The limiting clamping strips (35) are all slidably connected to the inner side of the hexagonal protrusion groove (34). A rectangular movable block (36) is fixed to the top of each strip (35), and a spring (37) is fixed to one end of each rectangular movable block (36). Multiple limiting guide cavities (38) corresponding to the positions of the rectangular movable blocks (36) are evenly distributed at the bottom of the sealing ring (33). The limiting guide cavity (38) is slidably connected to the rectangular movable block (36), and the end of the spring (37) away from the rectangular movable block (36) is fixed to the end of the limiting guide cavity (38) inside.

10. A control system for a crane lifting device, applicable to a crane lifting device as described in any one of claims 1-9, characterized in that, include: The hydraulic control module is used to adjust the advance amount of the output end of the hydraulic rod (5); An angle sensing unit is installed on the limiting post (9) to monitor the torsion angle of the limiting post (9) in real time. The displacement sensing unit is mounted on the triangular force application frame (24) and is used to monitor the movement amplitude or rotation angle of the elliptical protrusion (27). The central processing unit is communicatively connected to the hydraulic control module, the angle sensing unit, and the displacement sensing unit, and is configured as follows: The hydraulic rod (5) is controlled to move according to the preset target value of the advance amount; Receive and compare the real-time data of the torsion angle and the magnitude of movement with a preset threshold; When the torsion angle deviates from the preset range, adjust the advance of the hydraulic rod (5); When the movement of the elliptical protrusion (27) reaches the target value, the hydraulic rod (5) stops moving.

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