Preparation method of hoisting frame capable of improving hoisting stability

By introducing stable components and self-balancing components into the lifting hanger, the problems of device instability and center of gravity shift during lifting are solved, and higher lifting stability and safety are achieved.

CN119822250AInactive Publication Date: 2025-04-15TONGLING XIMA ELECTROMECHANICAL CO LTD
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Patent Information

Application Number
CN202411931808.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-04-15
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing lifting hanger is not well fixed during the lifting process and is prone to shake. As the height of the cargo increases, the center of gravity of the device shifts, which may cause items to shake and safety hazards.

Method used

A design consisting of a base, support column, boom and self-balancing assembly is adopted. There is a stable assembly in the base to increase stability through friction between the ground cone and the surface; the self-balancing assembly adaptively adjusts the center of gravity of the boom through the counterweight and chain system to ensure the stability of the device during lifting.

Benefits of technology

By enhancing friction and self-balancing functions with the ground, the stability of the lifting equipment is significantly improved, shaking and pouring are avoided, and the safety of the lifting process is improved.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention belongs to the technical field of lifting equipment, and discloses a preparation method of a lifting frame capable of improving lifting stability, which comprises a base, a support column is fixedly mounted on one side of the top end of the base, a mounting seat is arranged at the top end of the support column, a notch is formed in the mounting seat, a lifting arm is arranged in the notch, and a winding and unwinding mechanism is arranged outside the lifting arm in a sleeving manner; a stabilizing assembly is arranged in the base, and self-balancing assemblies are symmetrically arranged on the front side and the back side of the suspension arm. Through mutual cooperation of internal structures, the ground cone extends out of the base and is inserted into the ground surface, the friction force between the ground cone and the ground is improved, the effect of stabilizing the hoisting equipment is achieved, and the situation that the hoisting equipment shakes left and right during operation is avoided; along with the rising of the lifted goods, the balancing weight at the bottom end of the lifting arm is driven to move towards one side of the supporting column through the operation of the self-balancing assembly, the gravity center position of the whole equipment can be adjusted in a self-adaptive mode, and the situation that the equipment topples over in the lifting process is avoided.
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Description

Technical Field

[0001] The present application relates to the technical field of lifting equipment, and more specifically, to a method for preparing a lifting hanger that improves lifting stability. Background Art

[0002] Lifting equipment is a type of lifting machinery. It is a machine that performs cyclic and intermittent motions. A working cycle includes the picking device lifting the object from the picking location, then moving horizontally to the designated location to lower the object, and then performing reverse motion to return the picking device to its original position for the next cycle. Usually, lifting machinery consists of a lifting mechanism, a running mechanism, a luffing mechanism and a slewing mechanism. It is a multi-action lifting machinery that vertically lifts and horizontally transports heavy objects within a certain range. It is mainly used to lift pieced items. After being equipped with appropriate slings, it can also lift bulk materials and liquid materials.

[0003] Some existing lifting hangers are usually placed directly on the ground without any reinforcing and stable structure between the ground. Therefore, during the lifting process, the fixing effect of the lifting hanger body itself is poor and it is easy to shake. In addition, when lifting goods, as the height of the goods increases, the center of gravity of the device itself will shift, so that during lifting, the body may tilt and cause the goods to shake, which poses certain safety hazards.

[0004] In order to solve the above problems, the present application provides a method for preparing a lifting hanger that improves lifting stability. Summary of the invention

[0005] The present application provides a method for preparing a lifting hanger for improving lifting stability by adopting the following technical solution:

[0006] A preparation method for a lifting hanger for improving lifting stability, comprising a base, a support column is fixedly installed on one side of the top of the base, a mounting seat is arranged on the top of the support column, a notch is provided inside the mounting seat, a lifting arm is arranged inside the notch, a circular hole is provided at one end of the lifting arm, a rotating rod is arranged inside the circular hole, two ends of the rotating rod are respectively rotatably connected to the inner walls of the front and rear sides of the mounting seat, a hook is arranged at the other end of the lifting arm, a winding and unwinding mechanism is sleeved on the outside of the lifting arm, a bracket is fixedly installed on the other side of the top of the base, a hydraulic rod is arranged on the top of the bracket, and the top of the hydraulic rod is arranged at the bottom end of the lifting arm;

[0007] A stabilizing component is provided inside the base, a plurality of ground cones are provided at the bottom end of the stabilizing component, a corresponding socket adapted to the ground cone is provided at the bottom end of the base, the ground cone is slidably inserted and connected inside the socket, self-balancing components are symmetrically provided on the front and back sides of the boom, a counterweight is provided at the bottom end of the self-balancing component, a U-shaped plate is fixedly connected to the top end of the counterweight, and the top end of the U-shaped plate is slidably connected to the bottom end of the boom.

[0008] Furthermore, the stabilizing assembly includes a lifting plate, a lifting cylinder, a threaded rod, a worm gear and a worm, the outer wall of the lifting plate is slidably connected to the inner wall of the base, and the bottom end of the lifting plate is fixedly connected to the top end of the ground cone.

[0009] Through the above technical solution, the lifting plate can drive the ground cone at the bottom to move synchronously during the descent process, and then extend from the bottom socket and insert into the ground surface.

[0010] Furthermore, the bottom ends of the two lifting cylinders are symmetrically fixedly connected to the top sides of the lifting plate, threaded holes matching the threaded rods are provided inside the lifting cylinders, and the bottoms of the threaded rods are rotatably connected to the inside of the lifting cylinders.

[0011] Through the above technical solution, the lifting plate and the threaded rod are connected through the lifting cylinder. When the threaded rod rotates, the lifting plate can be driven to rise or fall through the lifting cylinder.

[0012] Furthermore, the top of the threaded rod is rotatably connected to the top inner wall of the base, the worm gear is sleeved on the top of the threaded rod, the outer wall of the worm gear is meshed with the outer wall of the worm, and the two ends of the worm are rotatably connected to the inner walls on both sides of the base respectively.

[0013] Through the above technical solution, when the worm rotates, the worm wheel on one side can be turned, thereby driving the threaded rod to rotate.

[0014] Furthermore, the two groups of self-balancing components each include a sprocket, a chain, a first gear and a second gear. The sprockets of the same group are symmetrically arranged on both sides of the boom, and the two ends of the chain are respectively sleeved on the outside of the two sprockets.

[0015] Through the above technical solution, the sprockets on both sides are connected by chains for transmission. When the sprocket on the side close to the hook rotates, the sprocket on the other side can be driven to rotate synchronously.

[0016] Furthermore, a first shaft hole is opened on the back side of the sprocket, a second rotating shaft is arranged inside the first shaft hole, and the second rotating shaft is rotatably connected to a fixing frame at one end away from the boom.

[0017] Through the above technical solution, two sets of self-balancing components are fixedly installed on one side of the boom through the fixing frames on both sides.

[0018] Furthermore, the second gear is sleeved on the outside of the second rotating shaft, and the outer wall of the second gear is meshed with the outer wall of the first gear.

[0019] Through the above technical solution, when the first gear rotates, the sprocket on one side can be driven to rotate through the second gear and the second rotating shaft.

[0020] Furthermore, opposite ends of the plurality of fixing frames are symmetrically fixedly connected to the front and back sides of the boom, and the bottom end of the chain is fixedly connected to the top end of the U-shaped plate.

[0021] Through the above technical solution, when the sprockets on both sides rotate, the chain can be operated, thereby driving the counterweight block to move through the U-shaped plate at the bottom.

[0022] Furthermore, the winding and unwinding mechanism includes a driving power supply, a winding wheel, a fixed pulley and a suspension rope. A fixed seat is provided at the bottom end of the driving power supply, and a driving shaft is provided on the back of the driving power supply. One end of the driving shaft is fixedly sleeved on the inside of the winding wheel, and one end of the suspension rope is sleeved on the outside of the winding wheel.

[0023] Through the above technical solution, when the reel rotates clockwise, one end of the lifting rope can be reeled in, thereby driving the lifting hook to rise through the other end of the lifting rope.

[0024] Furthermore, the fixed pulley is symmetrically arranged on both sides of the top of the boom, a fixed shaft is arranged inside the fixed pulley, both ends of the fixed shaft are rotatably connected to auxiliary frames, the bottom end of the auxiliary frame is fixedly connected to both sides of the boom, the lifting rope is sleeved on the outside of the fixed pulley, and the other end of the lifting rope is fixedly connected to the top of the hook.

[0025] Through the above technical solution, the fixed pulleys on both sides are respectively installed on both sides of the boom through the fixed shaft and the auxiliary frame.

[0026] In summary, this application includes the following beneficial technical effects:

[0027] 1. This invention has a stabilizing component inside the base. Through the cooperation between the internal structures, the ground cone can be extended out of the base and inserted into the ground surface, thereby increasing the friction between the ground and stabilizing the lifting equipment and preventing the lifting equipment from shaking left and right during operation.

[0028] 2. This invention has a self-balancing component on one side of the boom. As the lifted cargo rises, the counterweight at the bottom of the boom is driven to move toward the support column through the operation of the self-balancing component, so that the center of gravity of the entire equipment can be adaptively adjusted to avoid the equipment from tipping over during the lifting process, thereby improving the safety of the device.

[0029] 3. The invention, with the cooperation of the stabilizing component and the self-balancing component, can greatly improve the stability of the lifting equipment during lifting and facilitate its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of this application;

[0031] Figure 2 This is a first cross-sectional structural schematic diagram of the present application;

[0032] Figure 3 For this application Figure 2 A schematic diagram of the structure enlargement in the middle;

[0033] Figure 4 This is a schematic diagram of the top view of the structure of this application;

[0034] Figure 5 For this application Figure 4 Enlarged schematic diagram of the structure at B in the middle

[0035] Figure 6 This is a second cross-sectional structural schematic diagram of the present application.

[0036] Description of the numbers in the figure:

[0037] 1. Base; 2. Support column; 3. Bracket; 4. Fixed seat; 5. Driving power supply; 6. Winding wheel; 7. Lifting rope; 8. Hydraulic rod; 9. Boom; 10. Fixed pulley; 11. Auxiliary frame; 12. Fixed frame; 13. Sprocket; 14. Chain; 15. U-shaped plate; 16. Counterweight; 17. Hook; 18. Driving shaft; 19. Rotating rod; 20. Ground cone; 21. Lifting plate; 22. Lifting cylinder; 23. Threaded rod; 24. Worm wheel; 25. Worm; 26. Fixed shaft; 27. Mounting seat; 28. First gear; 29. ​​Second gear; 30. Second rotating shaft. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0039] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] Example:

[0042] The present application embodiment discloses a method for preparing a lifting hanger that improves lifting stability. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , including a base 1, a support column 2 is fixedly installed on one side of the top of the base 1, a mounting seat 27 is arranged on the top of the support column 2, a notch is provided inside the mounting seat 27, a boom 9 is arranged inside the notch, a circular hole is provided at one end of the boom 9, a rotating rod 19 is arranged inside the circular hole, both ends of the rotating rod 19 are rotatably connected to the inner walls of the front and back sides of the mounting seat 27 respectively, a hook 17 is arranged at the other end of the boom 9, a winding mechanism is sleeved on the outside of the boom 9, a bracket 3 is fixedly installed on the other side of the top of the base 1, a hydraulic rod 8 is arranged on the top of the bracket 3, and the top of the hydraulic rod 8 is arranged at the bottom end of the boom 9;

[0043] A stabilizing component is provided inside the base 1, and a plurality of ground cones 20 are provided at the bottom end of the stabilizing component. A corresponding socket adapted to the ground cones 20 is provided at the bottom end of the base 1, and the ground cones 20 are slidably inserted and connected inside the socket. Self-balancing components are symmetrically provided on the front and back sides of the boom 9, and a counterweight block 16 is provided at the bottom end of the self-balancing component. A U-shaped plate 15 is fixedly connected to the top end of the counterweight block 16, and the top end of the U-shaped plate 15 is slidably connected to the bottom end of the boom 9.

[0044] See also Figure 2 and Figure 3The stabilizing assembly includes a lifting plate 21, a lifting cylinder 22, a threaded rod 23, a worm gear 24 and a worm 25. The outer wall of the lifting plate 21 is slidably connected to the inner wall of the base 1, and the bottom end of the lifting plate 21 is fixedly connected to the top end of the ground cone 20.

[0045] When the lifting plate 21 descends, it can drive the ground cone 20 at the bottom to move synchronously, and then extend from the bottom insertion hole and insert into the ground surface.

[0046] See also Figure 2 and Figure 3 The bottom ends of the two lifting cylinders 22 are symmetrically fixedly connected to the top sides of the lifting plate 21 , and threaded holes matching the threaded rods 23 are provided inside the lifting cylinders 22 , and the bottoms of the threaded rods 23 are rotatably connected to the inside of the lifting cylinders 22 .

[0047] The lifting plate 21 and the threaded rod 23 are connected via a lifting cylinder 22. Since the bottom end of the lifting cylinder 22 is fixed to the top end of the lifting plate 21, the lifting cylinder 22 cannot rotate. Therefore, when the threaded rod 23 rotates, the lifting plate 21 can be raised or lowered by the lifting cylinder 22.

[0048] See also Figure 2 and Figure 3 The top of the threaded rod 23 is rotatably connected to the top inner wall of the base 1, the worm wheel 24 is sleeved on the top of the threaded rod 23, the outer wall of the worm wheel 24 is meshed with the outer wall of the worm 25, and the two ends of the worm 25 are rotatably connected to the inner walls on both sides of the base 1 respectively.

[0049] One end of the worm 25 extends to one side of the base 1 and is provided with a servo motor. When the worm 25 rotates, it can turn the worm wheel 24 on one side, thereby driving the threaded rod 23 to rotate.

[0050] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The two sets of self-balancing components include a sprocket 13, a chain 14, a first gear 28 and a second gear 29. The same set of sprockets 13 are symmetrically arranged on both sides of the boom 9, and the two ends of the chain 14 are respectively sleeved on the outside of the two sprockets 13.

[0051] The sprocket wheels 13 on both sides are respectively connected by chains 14 for transmission. When the sprocket wheel 13 on the side close to the hook 17 rotates, the sprocket wheel 13 on the other side can be driven to rotate synchronously.

[0052] See also Figure 1 , Figure 4 , Figure 5 and Figure 6A first shaft hole is provided on the back of the sprocket 13 , a second rotating shaft 30 is provided inside the first shaft hole, and the second rotating shaft 30 is rotatably connected to the fixing frame 12 at one end away from the boom 9 .

[0053] One end of the second rotating shaft 30 is fixedly sleeved inside the sprocket 13. When the second rotating shaft 30 rotates, it can drive the sprocket 13 to rotate. The two sets of self-balancing components are fixedly installed on one side of the boom 9 through the fixing frames 12 on both sides.

[0054] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The second gear 29 is sleeved on the outside of the second rotating shaft 30 , and the outer wall of the second gear 29 is meshed with the outer wall of the first gear 28 .

[0055] The other end of the second rotating shaft 30 is fixedly sleeved inside the second gear 29 . The diameter of the first gear 28 is smaller than that of the second gear 29 . When the first gear 28 rotates, the sprocket 13 on one side can be driven to rotate through the second gear 29 and the second rotating shaft 30 .

[0056] See also Figure 1 , Figure 4 , Figure 5 and Figure 6 The opposite ends of the plurality of fixing frames 12 are symmetrically fixedly connected to the front and back sides of the boom 9 , and the bottom end of the chain 14 is fixedly connected to the top of the U-shaped plate 15 .

[0057] When the sprocket wheels 13 on both sides rotate, the chain 14 can be operated, thereby driving the counterweight block 16 to move through the U-shaped plate 15 at the bottom.

[0058] See also Figure 2 , Figure 4 and Figure 6 The winding mechanism includes a driving power supply 5, a winding wheel 6, a fixed pulley 10 and a suspension rope 7. A fixed seat 4 is provided at the bottom end of the driving power supply 5, and a driving shaft 18 is provided on the back of the driving power supply 5. One end of the driving shaft 18 is fixedly sleeved on the inside of the winding wheel 6, and one end of the suspension rope 7 is sleeved on the outside of the winding wheel 6.

[0059] The driving power source 5 is connected to the winding wheel 6 through the driving shaft 18. When the driving power source 5 is started and the winding wheel 6 is driven to rotate clockwise, one end of the suspension rope 7 can be wound up, thereby driving the hook 17 to rise through the other end of the suspension rope 7.

[0060] See also Figure 2 , Figure 4 and Figure 6The fixed pulley 10 is symmetrically arranged on both sides of the top of the boom 9, a fixed shaft 26 is arranged inside the fixed pulley 10, both ends of the fixed shaft 26 are rotatably connected to the auxiliary frame 11, the bottom end of the auxiliary frame 11 is fixedly connected to both sides of the boom 9, the lifting rope 7 is sleeved on the outside of the fixed pulley 10, and the other end of the lifting rope 7 is fixedly connected to the top of the hook 17.

[0061] The fixed shaft 26 is fixedly sleeved inside the fixed pulley 10. The fixed shaft 26 on the side close to the hook 17 extends to both sides and is fixedly connected to the opposite sides of the two first gears 28 respectively. Therefore, when the fixed pulley 10 on one side rotates, the first gears 28 on both sides can be driven to rotate through the fixed shaft 26. The fixed pulleys 10 on both sides are respectively installed on both sides of the boom 9 through the fixed shaft 26 and the auxiliary frame 11.

[0062] The implementation principle of this embodiment is as follows: when the worm 25 rotates clockwise, the worm wheel 24 on one side can be moved to drive the threaded rod 23 to rotate clockwise. Since the bottom end of the lifting cylinder 22 is fixed to the top of the lifting plate 21, the lifting cylinder 22 cannot rotate. Therefore, when the threaded rod 23 rotates, the lifting plate 21 can be driven to descend through the lifting cylinder 22, thereby driving the ground cone 20 to extend through the lifting plate 21 and insert into the ground surface.

[0063] During the lifting process, the lifting rope 7 will drive the fixed pulley 10 to rotate clockwise, thereby driving the first gears 28 at both ends to rotate coaxially through the fixed shaft 26, and then shifting the second gear 29 on one side, driving the sprocket 13 on one side to rotate counterclockwise through the second rotating shaft 30, and under the action of the sprocket 13 on the other side, the chain 14 will rotate counterclockwise, so that the counterweight block 16 can be driven to move to the side close to the support column 2 through the bottom U-shaped plate 15, thereby adjusting the overall center.

[0064] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for preparing a lifting hanger for improving lifting stability, comprising a base (1), characterized in that: A support column (2) is fixedly mounted on one side of the top end of the base (1), a mounting seat (27) is arranged on the top end of the support column (2), a slot is provided inside the mounting seat (27), a suspension arm (9) is arranged inside the slot, a circular hole is provided at one end of the suspension arm (9), a rotating rod (19) is arranged inside the circular hole, two ends of the rotating rod (19) are rotatably connected to the inner walls of the mounting seat (27) on both sides, a hook (17) is arranged on the other end of the suspension arm (9), a winding mechanism is sleeved on the outside of the suspension arm (9), a bracket (3) is fixedly mounted on the other side of the top end of the base (1), a hydraulic rod (8) is arranged on the top end of the bracket (3), and the top end of the hydraulic rod (8) is arranged at the bottom end of the suspension arm (9); A stabilizing component is arranged inside the base (1), and a plurality of groups of ground cones (20) are arranged at the bottom end of the stabilizing component. A corresponding plug hole matching the ground cone (20) is opened at the bottom end of the base (1), and the ground cone (20) is slidably inserted and connected inside the plug hole. Self-balancing components are symmetrically arranged on both sides of the boom (9), and a counterweight block (16) is arranged at the bottom end of the self-balancing component. The top end of the counterweight block (16) is fixedly connected to a U-shaped plate (15), and the top end of the U-shaped plate (15) is slidably connected to the bottom end of the boom (9).

2. A method for preparing a lifting hanger for improving lifting stability according to claim 1, characterized in that: The stabilizing assembly comprises a lifting plate (21), a lifting cylinder (22), a threaded rod (23), a worm wheel (24) and a worm (25); the outer wall of the lifting plate (21) is slidably connected to the inner wall of the base (1); and the bottom end of the lifting plate (21) is fixedly connected to the top end of the ground cone (20).

3. A method for preparing a lifting hanger for improving lifting stability according to claim 2, characterized in that: The bottom ends of the two lifting cylinders (22) are symmetrically fixedly connected to the top sides of the lifting plate (21), and threaded holes matching the threaded rods (23) are provided inside the lifting cylinders (22), and the bottoms of the threaded rods (23) are rotatably connected to the inside of the lifting cylinders (22).

4. A method for preparing a lifting hanger for improving lifting stability according to claim 2, characterized in that: The top end of the threaded rod (23) is rotatably connected to the top inner wall of the base (1); the worm wheel (24) is sleeved on the top of the threaded rod (23); the outer wall of the worm wheel (24) is meshed with the outer wall of the worm (25); and the two ends of the worm (25) are rotatably connected to the inner walls on both sides of the base (1).

5. A method for preparing a lifting hanger for improving lifting stability according to claim 1, characterized in that: The two groups of self-balancing components both comprise a sprocket (13), a chain (14), a first gear (28) and a second gear (29); the sprockets (13) of the same group are symmetrically arranged on both sides of the boom (9); and the two ends of the chain (14) are respectively sleeved on the outside of the two sprockets (13).

6. A method for preparing a lifting hanger for improving lifting stability according to claim 5, characterized in that: A first shaft hole is provided on the back of the sprocket (13), a second rotating shaft (30) is arranged inside the first shaft hole, and the second rotating shaft (30) is rotatably connected to a fixing frame (12) at one end away from the suspension arm (9).

7. A method for preparing a lifting hanger for improving lifting stability according to claim 6, characterized in that: The second gear (29) is sleeved on the outside of the second rotating shaft (30), and the outer wall of the second gear (29) is meshed with the outer wall of the first gear (28).

8. A method for preparing a lifting hanger for improving lifting stability according to claim 6, characterized in that: The opposite ends of the plurality of fixing frames (12) are symmetrically fixedly connected to the front and back sides of the boom (9), and the bottom end of the chain (14) is fixedly connected to the top end of the U-shaped plate (15).

9. A method for preparing a lifting hanger for improving lifting stability according to claim 1, characterized in that: The winding and unwinding mechanism comprises a driving power source (5), a winding wheel (6), a fixed pulley (10) and a suspension rope (7); a fixing seat (4) is arranged at the bottom end of the driving power source (5); a driving shaft (18) is arranged at the back of the driving power source (5); one end of the driving shaft (18) is fixedly sleeved inside the winding wheel (6); and one end of the suspension rope (7) is sleeved outside the winding wheel (6).

10. A method for preparing a lifting hanger for improving lifting stability according to claim 9, characterized in that: The fixed pulley (10) is symmetrically arranged on both sides of the top of the boom (9); a fixed shaft (26) is arranged inside the fixed pulley (10); both ends of the fixed shaft (26) are rotatably connected to auxiliary frames (11); the bottom ends of the auxiliary frames (11) are fixedly connected to both sides of the boom (9); the lifting rope (7) is sleeved on the outside of the fixed pulley (10); and the other end of the lifting rope (7) is fixedly connected to the top of the hook (17).