Heavy steel coil hoisting device suitable for various hoisting equipment

Abstract

The utility model relates to hoisting equipment, in particular to a heavy steel coil hoisting device suitable for various hoisting equipment, which mainly comprises an upright post, a cantilever, a cross arm, a connecting seat, a bottom plate, a hydraulic motor, a speed reducer, an inner gear ring, a rotary disk, a vertical plate, an oil cylinder, a hook and the like. The upper end of a stand column is fixedly connected with a cantilever, and a cross arm is fixedly connected between the stand column and the cantilever to form a stable main body structure; the connecting seat is conveniently connected with hoisting equipment; a hydraulic motor and a speed reducer are installed on the bottom plate, and a gear is meshed with the inner gear ring to drive the rotary disc to rotate. An oil cylinder and a hook are hinged to the vertical plate, and hoisting and rotating of the steel coil are achieved. The device is compact in design and simple and convenient to operate, has an overload protection function, ensures the safety and stability in the hoisting process, and is widely applied to various hoisting equipment such as forklifts, loaders, crown blocks and the like.

Description

Technical Field

[0001] The utility model relates to a lifting equipment, in particular to a heavy steel coil lifting device applicable to a variety of lifting equipment. Background Art

[0002] In the fields of industrial logistics and manufacturing, the handling and storage of heavy steel coils is a crucial operation. Although traditional handling equipment such as forklifts, loaders, and overhead cranes play key roles in cargo handling, they still face a series of challenges and limitations when dealing with heavy and bulky steel coils.

[0003] Forklifts, as a widely used handling tool, are often designed for handling standardized goods. Facing steel coils with special shapes or overweight, forklifts do not perform well in terms of handling efficiency and safety. Although loaders perform well in earthwork projects, their cargo handling capabilities in fine operations and specific environments are limited, lacking the necessary flexibility. And overhead cranes, although common in indoor warehouse environments, their fixed track systems limit their application in outdoor or environments where it is not suitable to lay tracks.

[0004] To overcome these limitations, a large number of beneficial explorations have been carried out. For example, Chinese Patent CN111533046A discloses a steel coil lifting mechanism. Although this technical solution alleviates the problem of steel coil handling to a certain extent, there are still some significant defects in actual applications. These defects are mainly manifested in that if major modifications are required to the original structure of the forklift to adapt to this lifting mechanism, it will not only increase the modification cost but also may reduce the performance of the forklift, affecting its stability and durability; if a forklift designed specifically for steel coil handling is used, the forklift loses its flexibility and versatility and cannot adapt to the handling of other types of goods, resulting in waste of resources and inconvenience in use. In addition, the use of special equipment also increases the difficulty of equipment maintenance and management for enterprises. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model proposes an innovative heavy steel coil lifting device, aiming to achieve efficient and safe lifting of heavy steel coils without large-scale modification of existing lifting equipment. The design of this device fully considers generality and adaptability, enabling it to be widely applied to a variety of lifting equipment such as forklifts, loaders, and overhead cranes, significantly improving the applicability and economy of the equipment. The technical solutions adopted by the utility model are as follows:

[0006] A heavy-duty steel coil lifting device applicable to a variety of lifting equipment, comprising two columns. The upper ends of the two columns are respectively fixedly connected with cantilevers. A plurality of cross braces are fixedly connected between the two columns and the cantilevers. Different from the prior art, connection seats adapted to be connected with the lifting equipment are respectively fixedly connected near the upper ends of the two columns. A bottom plate, a hydraulic motor and a speed reducer are fixedly connected near the free ends of the two cantilevers. An internal gear ring with a vertical axis is rotatably arranged on the bottom plate. The output shaft of the speed reducer is fixedly connected with a gear, and the gear meshes with the internal gear ring. The lower end of the internal gear ring passes through the bottom plate with a clearance and is fixedly connected with a rotary disc. The rotary disc is fixedly connected with two vertical plates. Upper pin holes and lower pin holes are formed on the two vertical plates. One or more oil cylinders are hinged through the upper pin holes, and a C-shaped hook adapted to be inserted into the middle hole of the steel coil is hinged through the lower pin holes. The piston rod of the oil cylinder is hinged with the middle part of the hook.

[0007] Further, pads adapted to abut against the lifting equipment and / or clamping plates adapted to be inserted into the lifting equipment are respectively fixedly connected to the lower ends of the two columns.

[0008] Further, top plates are fixedly connected to the two cantilevers corresponding to the bottom plate. The upper section of the internal gear ring, the hydraulic motor and the speed reducer are located in the cavity formed by the top plate and the bottom plate.

[0009] Further, rubber pads are fixedly arranged on the vertical rod parts of the hook opposite to the end faces of the steel coil; reinforcing ribs are fixedly arranged at the joints of the columns and the cantilevers.

[0010] Further, the internal gear ring is transferred through a thrust bearing between the bottom plate.

[0011] Further, the connection seat is a pin hole type connection seat, and a pin shaft with a locking mechanism is matched with the connection seat.

[0012] Further, the oil cylinder can maintain its position at a certain telescopic position without continuous power input.

[0013] Further, the oil cylinder and the hydraulic motor are connected to the hydraulic oil circuit of the lifting equipment through pipelines.

[0014] Further, a chain scale for measuring and warning the height of the steel coil is installed on the hook. The oil cylinder and the hydraulic motor are equipped with overload protection devices, which automatically trigger the protection mechanism when the load exceeds the safety threshold.

[0015] Further, the rotary disc is provided with a rotary encoder for real-time monitoring and controlling the rotation angle of the rotary disc.

[0016] Compared with the prior art, the beneficial technical effects of the utility model are:

[0017] Compatibility Advantage: Through the design of the connection base, this device can adapt to various types of lifting equipment without large-scale modification or adjustment of the original equipment, thus reducing the application cost and time.

[0018] Enhanced Safety: By rotating the turntable, the loading angle can be adjusted to facilitate the front-facing of the steel coil end face, avoiding the steel coil from rolling forward and pressing on the cab, ensuring the safety of the driver. Moreover, the variable-angle hook design helps to prevent the accidental detachment of the steel coil during hoisting, improving the safety of the operation.

[0019] Improved Structural Strength: The design of the column combined with the cross brace of the cantilever provides higher structural stability and strength, capable of withstanding the hoisting load of heavy steel coils and reducing the risk of deformation and damage during operation.

[0020] Enhanced Operational Flexibility: The integrated design of the hydraulic motor and the reducer, combined with the meshing drive of the internal gear ring and the gear, realizes the smooth rotation and precise positioning of the hoisting device, improving the operational flexibility and adaptability of the operation.

[0021] Multi-angle Adaptability: The hook can rotate and adapt to different placement requirements of the steel coil, providing greater operational flexibility and the ability to adapt to different working environments.

[0022] Precise Pitch Adjustment: The pitch adjustment of the hook angle is achieved through the oil cylinder, and the contact angle between the hook and the steel coil can be precisely controlled according to the operation requirements, optimizing the hoisting process.

[0023] Slow Descent Control: The design of the hook allows one end of the steel coil to touch the ground first. By controlling the telescoping of the oil cylinder, the smooth placement of the steel coil can be realized, avoiding large vibrations caused by rough placement and protecting the steel coil and the hoisting equipment.

[0024] Reduced Impact Damage: The pitch and rotation functions of the hook enable the steel coil to contact the ground or other contact surfaces more smoothly during loading and unloading, reducing the damage caused by impact.

[0025] Improved Operational Efficiency: The flexibility and controllability of the hook reduce the repositioning and adjustment of the steel coil, thus improving the overall operational efficiency.

[0026] Extended Equipment Service Life: By reducing equipment damage caused by improper operation, this device helps to extend the service life of the lifting equipment and the steel coil.

[0027] Operational Simplicity: The integrated hydraulic control system simplifies the operation process, enabling the operator to more conveniently control the rotation and pitch of the hook and reducing the operation difficulty.

[0028] Reduced Maintenance Cost: Due to design optimization, the maintenance cost caused by improper operation or equipment failure is reduced.

[0029] In summary, through its innovative design, the heavy-duty steel coil lifting device of the present utility model provides a safe, efficient, flexible and economical steel coil lifting solution, which is applicable to various lifting equipment and significantly improves the performance and reliability of the lifting operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the present utility model.

[0031] Figure 2 is a schematic structural diagram of the present utility model from another perspective.

[0032] Figure 3 is Figure 2 a schematic structural diagram after hiding the top plate.

[0033] Figure 4 is Figure 3 a partial enlarged view at position B of

[0034] Figure 5 is a schematic structural diagram of some components of the present utility model.

[0035] Figure 6 is Figure 5 a partial enlarged view at position A of

[0036] Figure 7 is a schematic diagram of the state when the present utility model is lifting a steel coil.

[0037] Figure 8 is a step-by-step state diagram when the hook of the present utility model gradually enters the steel coil.

[0038] Figure 9 is a schematic diagram of the state when the present utility model realizes that one end of the steel coil touches the ground first and avoids falling off by changing the angle of the hook.

[0039] Figure 10 is a step-by-step state diagram when the present utility model rotates 360 degrees after lifting the steel coil.

[0040] Reference numerals in the drawings: column - 1, cantilever - 2, cross brace - 3, connecting seat - 4, reinforcing rib - 5, cushion block - 6, clamping plate - 7, bottom plate - 8, top plate - 9, hydraulic motor - 10, speed reducer - 11, internal gear ring - 12, gear - 13, slewing disc - 14, vertical plate - 15, upper pin hole - 16, lower pin hole - 17, oil cylinder - 18, hook - 19, rubber pad - 20, thrust bearing - 21, steel coil - 100. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. At the same time, the orientation or positional relationship indicated by "front", "rear", etc. used in the embodiments is only based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0042] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0043] Refer to Figure 1-10 As shown, a heavy-duty steel coil lifting device applicable to a variety of lifting equipment includes two columns 1. The upper ends of the two columns 1 are respectively fixedly connected with cantilevers 2. A plurality of cross braces 3 are fixedly connected between the two columns 1 and the cantilevers 2. Connection seats 4 adapted to be connected with the lifting equipment are respectively fixedly connected near the upper ends of the two columns 1. A bottom plate 8, a hydraulic motor 10 and a speed reducer 11 are fixedly arranged near the free ends of the two cantilevers 2. An internal gear ring 12 with a vertical axis is rotatably arranged on the bottom plate 8. The output shaft of the speed reducer 11 is fixedly connected with a gear 13, and the gear 13 meshes with the internal gear ring 12. The lower end of the internal gear ring 12 passes through the bottom plate 8 with a clearance and is fixedly connected with a rotating disk 14. Two vertical plates 15 are fixedly connected to the rotating disk 14. Upper pin holes 16 and lower pin holes 17 are formed in the two vertical plates 15. Two oil cylinders 18 are hinged through the upper pin holes 16, and a hook 19 in a C shape and adapted to be inserted into the middle hole of the steel coil 100 is hinged through the lower pin holes 17. The piston rod of the oil cylinder 18 is hinged to the middle of the hook 19.

[0044] In use, first, connect the hoisting device to the lifting equipment by means of the connecting seat 4. The design of the connecting seat 4 enables it to adapt to various types of lifting equipment, ensuring the stability of the hoisting device. Preparation of the hydraulic system: On the bottom plate 8 of the hoisting device, the hydraulic motor 10 and the speed reducer 11 are fixedly arranged. The oil cylinder 18 and the hydraulic motor 10 are connected to the hydraulic oil circuit of the lifting equipment to provide power. Operate the hydraulic system to drive the oil cylinder 18 so that the hook 19 moves above the steel coil 100 and accurately inserts into the central hole of the steel coil. Subsequently, the lifting equipment provides an upward force to lift the steel coil 100. By controlling the telescopic movement of the oil cylinder 18, adjust the pitching angle of the hook 19 to ensure the stability of the steel coil 100 during lifting and transportation. When placing the steel coil, the oil cylinder 18 can be carefully controlled to make one end of the steel coil 100 touch the ground smoothly first, avoiding large vibrations or impacts. If necessary, the hydraulic motor 10 can drive the rotary disk 14 to rotate through the gear 13 and the internal gear ring 12 to achieve the rotation of the hoisting device in the horizontal plane to adapt to different placement requirements. After reaching the designated position, control the oil cylinder 18 to descend to place the steel coil 100 smoothly on the ground or other predetermined positions. Then, retract the oil cylinder 18, and the hook 19 disengages from the central hole of the steel coil to complete the entire hoisting and unloading process. Through the above steps, the heavy steel coil hoisting device of the present utility model realizes the safe and efficient hoisting and unloading of heavy steel coils, and at the same time provides high adaptability and operation flexibility.

[0045] In another preferred embodiment, the lower ends of the two columns 1 are respectively fixedly connected with a cushion block 6 adapted to abut against the lifting equipment and / or a clamping plate 7 adapted to be inserted into the lifting equipment. The cushion block 6 is designed to abut against the bottom of the lifting equipment. This design can provide additional support and stability, especially when the lifting equipment needs to operate on an uneven or inclined surface. The cushion block 6 can be made of a strong and durable material to withstand the load and pressure during the hoisting process. The clamping plate 7 is designed to be inserted into the side or other suitable parts of the lifting equipment. This design allows the hoisting device to be quickly installed and disassembled, improving the flexibility and efficiency of the operation. The clamping plate 7 can be designed to be adjustable to adapt to lifting equipment of different widths or shapes. The use of the cushion block 6 and the clamping plate 7 improves the stability between the hoisting device and the lifting equipment, reducing the shaking and displacement during the hoisting process. The design of the cushion block 6 and the clamping plate 7 enables the hoisting device to adapt to more types of lifting equipment, including equipment of different sizes, shapes and working conditions.

[0046] In another preferred embodiment, a top plate 9 is fixedly connected to the two cantilevers 2 corresponding to the bottom plate 8, and the upper section of the internal gear ring 12, the hydraulic motor 10, and the speed reducer 11 are located in the cavity formed by the top plate 9 and the bottom plate 8. Fixing the top plate 9 to the two cantilevers 2 not only enhances the structural stability of the entire hoisting device but also provides additional protection and support for the internal components. It reduces the potential damage to the hydraulic components caused by external factors, reduces the risk of failure, and improves the safety of the hoisting operation.

[0047] In another preferred embodiment, a rubber pad 20 is fixedly provided on the vertical rod portion of the hook 19 opposite to the end face of the steel coil 100; a reinforcing rib 5 is fixedly provided at the junction of the column 1 and the cantilever 2. The rubber pad 20 can protect the surface of the steel coil 100 and prevent scratches or damages caused by friction or impact during the hoisting process. The rubber material helps to absorb and reduce the noise that may be generated during the hoisting process and improves the working environment. The reinforcing rib 5 can significantly improve the structural strength at the junction of the column 1 and the cantilever 2, enabling it to withstand greater loads and impact forces. When hoisting heavy objects, the reinforcing rib 5 helps to prevent bending or deformation caused by the load, ensuring the stability and reliability of the hoisting device. By enhancing the structural strength of key parts, the reinforcing rib 5 helps to extend the service life of the hoisting device and reduce the frequency of maintenance and replacement.

[0048] In another preferred embodiment, the internal gear ring 12 and the bottom plate 8 are transferred through a thrust bearing 21. The use of the thrust bearing 21 significantly reduces the friction between the internal gear ring 12 and the bottom plate 8 during rotation, which helps to improve the rotation efficiency and service life of the slewing disc 14. The thrust bearing 21 can bear and transmit axial loads, ensuring the stability of the internal gear ring 12 during the hoisting process and reducing displacement or vibration caused by the load. As a standardized component, the thrust bearing 21 is relatively simple to maintain and replace, which helps to reduce the maintenance cost during long-term operation. Due to the high load-bearing capacity and durability of the thrust bearing 21, the durability and reliability of the entire hoisting device are enhanced. The use of the thrust bearing 21 helps to maintain the accuracy of the rotation of the internal gear ring 12, which is crucial for ensuring the meshing accuracy between the gear 13 and the internal gear ring 12. When hoisting a heavy steel coil 100, the thrust bearing 21 can effectively support the axial force generated by the hoisting and ensure the stability of the entire transmission system. Reducing friction also means reducing energy loss and improving the energy efficiency of the hoisting device. The thrust bearing 21 allows the internal gear ring 12 to rotate more flexibly, which helps to achieve smoother and more accurate hoisting operations. Since the thrust bearing 21 can bear repeated loads and rotations, it helps to extend the service life of the internal gear ring 12 and related components.

[0049] In another preferred embodiment, the connecting seat 4 is a pin-hole type connecting seat, and is equipped with a pin shaft that has a locking mechanism in cooperation with the connecting seat 4. The connecting seat 4 adopts a pin-hole type design, which allows for quick and convenient connection to the corresponding part of the lifting equipment through the pin shaft, achieving rapid installation and disassembly of the lifting device. The connecting seat 4 adopts a pin-hole type design, which allows for quick and convenient connection to the corresponding part of the lifting equipment through the pin shaft, achieving rapid installation and disassembly of the lifting device. The combination of the pin-hole type connecting seat and the locking pin shaft provides higher connection stability, ensuring that the connection between the lifting device and the lifting equipment will not loosen or become disengaged even when lifting a heavy steel coil 100. The presence of the locking mechanism significantly improves the safety of operation, reducing the risk of lifting accidents caused by unstable connections. When rapid installation or disassembly of the lifting device is required, the design of the pin-hole type connecting seat and the pin shaft makes the operation faster and more convenient, improving work efficiency.

[0050] In another preferred embodiment, the oil cylinder 18 can maintain its telescopic position unchanged without continuous power input. The oil cylinder 18 adopts a self-locking hydraulic system, which uses the hydraulic pressure difference to lock the position of the oil cylinder and prevent the oil cylinder from telescoping when there is no input signal. Since the oil cylinder 18 does not require continuous power input to maintain its position, this design helps to save energy and reduce the energy consumption of the entire lifting system. The position-holding function reduces the risk of accidental movement of the load caused by hydraulic system failures or leaks, improving the safety of the lifting operation. The operator does not need to continuously operate the control system to maintain the load position, which simplifies the operation process and enables the operator to focus more on other operation tasks. In situations where the load needs to be kept stationary for a long time, such as during transportation or when operating on an uneven surface, the position-holding function of the oil cylinder 18 ensures the stability of the load.

[0051] In another preferred embodiment, the oil cylinder 18 and the hydraulic motor 10 are connected to the hydraulic oil circuit of the lifting equipment through pipelines. By using standard pipeline connections, the oil cylinder 18 and the hydraulic motor 10 can be quickly and conveniently integrated with the hydraulic system of the lifting equipment, simplifying the installation process. This design improves the compatibility of the hoisting device, enabling it to adapt to a variety of different models and specifications of lifting equipment without major modifications to the hydraulic system. Utilizing the existing hydraulic oil circuit of the lifting equipment reduces the need for a separate hydraulic system for the hoisting device, thereby reducing the costs of additional equipment and maintenance. Direct connection to the hydraulic oil circuit of the lifting equipment means that the oil cylinder 18 and the hydraulic motor 10 can immediately respond to control signals, improving the efficiency of the hoisting operation. Since it shares the hydraulic system of the lifting equipment, the maintenance and troubleshooting of the hydraulic components of the hoisting device can be carried out simultaneously with the lifting equipment, simplifying the maintenance work. By reducing additional hydraulic components, potential failure points are reduced, enhancing the reliability of the entire hoisting system. Connection to the hydraulic oil circuit of the lifting equipment enables the operation of the hoisting device to be integrated into the operation control system of the lifting equipment, facilitating unified control and monitoring.

[0052] In another preferred embodiment, a chain scale for measuring and warning the height of the steel coil 100 is installed on the hook 19; the oil cylinder 18 and the hydraulic motor 10 are equipped with overload protection devices that automatically trigger a protection mechanism when the load exceeds the safety threshold. The chain scale can slide along the vertical rod part of the hook, and the scale on the scale can help the operator intuitively understand the height of the steel coil, thereby more accurately controlling the hoisting and placement process. The use of the chain scale improves the accuracy of the hoisting operation, ensuring that the steel coil 100 can be placed or transported at a predetermined height and position. The chain scale can also be used as a warning tool to help the operator determine whether the steel coil 100 may collide with other objects or whether the safety height limit has been reached. The oil cylinder 18 and the hydraulic motor 10 are equipped with overload protection devices, which is a safety feature that automatically triggers a protection mechanism when the load exceeds the safety threshold designed for the equipment. When an overload situation is detected, the overload protection device will automatically activate, possibly by stopping the further extension or retraction of the oil cylinder 18 or stopping the operation of the hydraulic motor 10, to prevent equipment damage and potential safety accidents. The integration of the overload protection device improves the reliability of the entire hoisting system, ensuring that the equipment can respond appropriately in the face of unexpected overloading. By preventing equipment damage caused by overload, the overload protection device helps reduce long-term maintenance costs and downtime.

[0053] In another preferred embodiment, the rotary disk 14 is provided with a rotary encoder for real-time monitoring and control of the rotation angle of the rotary disk 14. The rotary encoder can accurately monitor the rotation angle of the rotary disk 14 to ensure the accuracy and repeatability of the hoisting operation. Through the real-time data fed back by the encoder, the control system can more precisely adjust the operation of the hydraulic motor 10 to achieve precise control of the rotary disk 14. The rotary encoder can interface with the automatic control system to realize the automatic control of the hoisting device and reduce the need for manual operation. Real-time monitoring of the rotation angle helps prevent accidents caused by improper operation, such as over-rotation or incomplete rotation. Precise control of the rotation angle of the rotary disk 14 can speed up the operation process and reduce the extra time required for adjustment and alignment. In a working environment with limited space or poor visibility, the angle information provided by the rotary encoder can help the operator complete the hoisting task more safely and accurately. The encoder can record the rotation data, providing a basis for operation analysis and subsequent optimization.

[0054] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacement of some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heavy steel coil lifting device suitable for various lifting equipment, comprising two columns (1), the upper ends of the two columns (1) are respectively fixedly connected to cantilevers (2), and a plurality of cross braces (3) are fixedly connected between the two columns (1) and the cantilever (2), characterized in that: The upper ends of the two uprights (1) are respectively fixedly connected to connection seats (4) suitable for connecting to lifting equipment, and the free ends of the two cantilevers (2) are fixedly connected to a base plate (8), a hydraulic motor (10) and a reducer (11) are fixedly installed, an axially vertical inner gear ring (12) is rotated on the base plate (8), and the output shaft of the reducer (11) is fixedly connected to a gear (13), and the gear (13) is meshed with the inner gear ring (12); the gap at the lower end of the inner gear ring (12) passes through the The bottom plate (8) is fixedly connected to a rotating disk (14) at the rear, and the rotating disk (14) is fixedly connected to two vertical plates (15). The two vertical plates (15) are provided with upper pin holes (16) and lower pin holes (17). One or more oil cylinders (18) are hingedly connected through the upper pin holes (16), and a C-shaped hook (19) suitable for being inserted into the middle hole of the steel coil (100) is hingedly connected through the lower pin holes (17). The piston rod of the oil cylinder (18) is hingedly connected to the middle part of the hook (19).

2. A heavy steel coil lifting device suitable for various lifting equipment according to claim 1, characterized in that: The lower ends of the two upright columns (1) are respectively fixedly connected to cushion blocks (6) suitable for abutting against a lifting device and / or to a clamping plate (7) suitable for plugging into a lifting device.

3. A heavy steel coil lifting device applicable to various lifting equipment according to claim 1, characterized in that: A top plate (9) is fixedly connected to the two cantilevers (2) corresponding to the bottom plate (8), and the upper section of the inner gear ring (12), the hydraulic motor (10) and the reducer (11) are located in a cavity formed by the top plate (9) and the bottom plate (8).

4. The heavy steel coil lifting device applicable to various lifting equipment according to claim 1, characterized in that: A rubber pad (20) is fixedly provided on the vertical rod portion of the hook (19) opposite to the end surface of the steel coil (100); and a reinforcing rib (5) is fixedly provided at the junction of the column (1) and the cantilever (2).

5. The heavy steel coil lifting device applicable to various lifting equipment according to claim 1, characterized in that: The inner gear ring (12) and the base plate (8) are connected via a thrust bearing (21).

6. The heavy steel coil lifting device applicable to various lifting equipment according to claim 1, characterized in that: The connection seat (4) is a pin-hole type connection seat, and a pin shaft having a locking mechanism cooperates with the connection seat (4).

7. The heavy steel coil lifting device applicable to various lifting equipment according to claim 1, characterized in that: The oil cylinder (18) can maintain itself in a certain telescopic position without the need for continuous power input.

8. The heavy steel coil lifting device applicable to various lifting equipment according to claim 1, characterized in that: The oil cylinder (18) and the hydraulic motor (10) are connected to the hydraulic oil circuit of the lifting equipment via pipelines.

9. The heavy steel coil lifting device applicable to various lifting equipment according to claim 1, characterized in that: The hook (19) is provided with a chain scale for measuring and warning the height of the steel coil (100); the oil cylinder (18) and the hydraulic motor (10) are equipped with an overload protection device, which automatically triggers a protection mechanism when the load exceeds a safety threshold.

10. The heavy steel coil lifting device applicable to various lifting equipment according to claim 1, characterized in that: The turntable (14) is provided with a rotary encoder for real-time monitoring and controlling the rotation angle of the turntable (14).

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