Self-tightening nut for wind power and manufacturing mold thereof

Abstract

This utility model provides a wind turbine anti-loosening self-tightening nut and its manufacturing mold. The wind turbine anti-loosening self-tightening nut includes a fan blade fixed to the top of the mounting frame and multiple nuts B installed on the outside of the fan blade. The key feature is that multiple flexible mounting blocks are fixed to the surface of the fan blade, and multiple flexible inserts are fixed to one side of each of the multiple nuts B. One end of each mounting block is inserted into one of the inserts. Multiple engaging components are provided around the outer side of each nut B, and the other ends of each engaging component are engaged with the surface of the fan blade. The wind turbine anti-loosening self-tightening nut B and its manufacturing mold provided by this utility model have a double locking function, are easy to disassemble, and have good performance.

Description

Technical Field

[0001] This utility model relates to the field of nut technology, and in particular to a wind power anti-loosening self-tightening nut and its manufacturing mold. Background Technology

[0002] With the increasing global demand for clean energy, wind power, as an important renewable energy source, is playing an increasingly important role in the energy mix. The wind power industry is in a phase of rapid development, with the installed capacity and number of wind turbine generators constantly increasing, placing higher demands on the performance, reliability, and maintenance costs of wind power equipment.

[0003] In wind turbine generators, the fan blades are one of the key components, and their installation and fixation are of paramount importance. During operation, the fan blades need to withstand complex wind loads, centrifugal forces, vibrations, and other forces. Therefore, the nuts and other fasteners used to fix the fan blades must have high reliability to ensure a stable connection between the fan blades and the mounting frame, prevent safety accidents caused by loose nuts, and ensure the normal operation of the wind turbine generator.

[0004] Because wind turbines are typically installed outdoors, their blades are constantly exposed to complex and changing natural conditions, such as strong winds, vibrations, and temperature fluctuations. Under these conditions, traditional nuts are prone to loosening. Once the nuts loosen, the connection between the blades and the mounting bracket weakens, causing the blades to wobble during operation. This not only affects the power generation efficiency of the wind turbine but can also lead to collisions between the blades and surrounding components, causing equipment damage and even serious safety accidents.

[0005] To address the loosening issue of traditional nuts in wind power applications, existing devices have undergone some technical improvements. For example, nuts with special thread shapes or surface treatments have been developed to increase the friction or engagement force between the threads, achieving self-locking. However, due to the self-tightening characteristics of the nuts, greater torque is required for disassembly, increasing the difficulty of maintenance and replacement, and leading to damage to the bolts or nuts. In addition, some methods of using chemical adhesives to fix the nuts, while improving the anti-loosening performance to some extent, suffer from problems such as adhesive aging and poor temperature resistance, and are difficult to disassemble, which is not conducive to equipment maintenance and replacement.

[0006] Therefore, it is necessary to provide a new anti-loosening self-tightening nut for wind power and its manufacturing mold to solve the above-mentioned technical problems. Utility Model Content

[0007] To solve the above-mentioned technical problems, this utility model provides a wind power anti-loosening self-tightening nut and its manufacturing mold.

[0008] The wind turbine anti-loosening self-tightening nut and its manufacturing mold provided by this utility model include: a fan blade fixed on the top of the mounting frame and a plurality of nuts B installed on the outside of the fan blade. The feature is that a plurality of flexible mounting blocks are fixed on the surface of the fan blade, and a plurality of flexible insert blocks are fixed on one side of each of the plurality of nuts B. One end of each of the plurality of mounting blocks is inserted into the plurality of insert blocks. A plurality of engaging components are provided around the outer side of the plurality of nuts B, and the other end of each of the plurality of engaging components is engaged with the surface of the fan blade.

[0009] Preferably, a plurality of screws are fixed to the surface of the fan blade, the inner rings of the plurality of nuts B are threadedly connected to the surfaces of the plurality of screws, and one end of the plurality of screws passes through the inner rings of the plurality of mounting blocks and is fixedly connected to the surface of the fan blade.

[0010] Preferably, each of the multiple engaging components includes a mounting plate one and a mounting plate two. The mounting plate one is fixed to the outside of the nut B, and the mounting plate two is fixed to the surface of the fan blade. A rotating shaft is rotatably provided on the inner wall of the mounting plate one, and a locking plate is fixed to the surface of the rotating shaft. A locking groove is also provided on the side of the locking plate away from the rotating shaft. A spring is fixed to the top of the mounting plate one, and the other end of the spring is fixedly connected to the end of the locking plate near the rotating shaft. A locking block is rotatably provided on the inner wall of the mounting plate two, and a limiting plate for limiting the rotation angle of the locking block is fixed to one side of the mounting plate two. One end of the locking block is engaged with the inner wall of the locking groove.

[0011] Preferably, a mounting plate is fixed to the top of the mounting frame, and the fan blades are rotatably disposed on one side of the mounting plate.

[0012] A mold for manufacturing a self-locking nut for wind power includes an upper mold frame and a conveyor. The upper mold frame is located on top of the conveyor. A driving mechanism and a pressing mechanism are sequentially fixed on the top of the upper mold frame. The pressing mechanism is located to one side of the driving mechanism. A liquid storage tank, a placement box, and a welding assembly are sequentially fixed on the top of the conveyor. Nut A is placed inside the placement box. The liquid storage assembly and the placement box are located below the driving mechanism and the pressing mechanism, respectively. The welding assembly is located to one side of the placement box. Preferably, both the driving mechanism and the pressing mechanism include a motor, a turntable, and a hydraulic rod. Both motors are fixed to the top of the upper film frame. The output end of the motor passes through the surface of the upper film frame and is fixedly connected to the top of the turntable. The bottom of the turntable is fixedly connected to the top of the hydraulic rod. The output ends of both hydraulic rods are fixed with magnet 2A. One magnet 2A is located directly above the liquid storage tank, and the other magnet 2A is located directly above the placement box.

[0013] Preferably, the interior of the liquid storage tank is provided with epoxy resin adhesive.

[0014] Preferably, the welding assembly includes a support frame, which is fixed to the top of the conveyor. A robotic arm is fixed to the top wall and the inner side wall of the support frame. A welding torch is also fixed to the inner side wall of the support frame. A drive box for rotating nut A is also fixed to the bottom wall of the support frame.

[0015] Compared with related technologies, the wind power anti-loosening self-tightening nut and its manufacturing mold provided by this utility model have the following beneficial effects: This invention utilizes the flexible nature of the mounting blocks and inserts to ensure that, during installation, one end of each insert is inserted into the mounting block, allowing the nut B to fit snugly against the mounting position of the fan blade. This significantly enhances the initial connection stability between the nut B and the fan blade, effectively reducing the possibility of loosening during subsequent operation due to initial loose installation. Furthermore, multiple locking components are arranged around the outside of the nut B, with the other end of each component engaging with the fan blade surface. When the nut B is subjected to wind loads, centrifugal forces, and vibrations, the locking components further restrict the rotation and movement of the nut B, forming a double anti-loosening guarantee with the initial locking action of the inserts and mounting blocks. Even in extremely harsh natural environments, the nut B can remain tight to a certain extent, ensuring the connection strength between the fan blade and the mounting frame, effectively preventing fan blade swaying, ensuring the stable operation of the wind turbine generator, and greatly improving the safety and reliability of the wind power equipment. When disassembling the nut B of this utility model, it is only necessary to first release the engagement between the locking component and the fan blade surface, and then turn the nut B. No excessive torque needs to be applied, making the operation simple and quick. This greatly reduces the difficulty of maintenance and replacement, solves the problem of bolt or nut damage caused by disassembly difficulties, extends the service life of the equipment, and reduces maintenance costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the fan blade structure; Figure 2 A schematic diagram of the overall structure of the wind power anti-loosening self-tightening nut provided by this utility model; Figure 3 A schematic cross-sectional view of the overall anti-loosening self-tightening nut for wind power provided by this utility model; Figure 4 A schematic diagram of the structure of the wind power anti-loosening self-tightening nut and its manufacturing mold provided by this utility model.

[0017] Numbered in the diagram: 1. Mounting frame; 11. Mounting plate; 111. Mounting block; 12. Fan blade; 2. Screw; 20. Nut A; 21. Magnet II A; 3. Nut B; 31. Mounting plate I; 32. Rotating shaft; 33. Clamping plate; 331. Clamping slot; 34. Spring; 35. Mounting plate II; 351. Limiting plate; 36. Clamping block; 37. Inserting block; 4. Upper film frame; 41. Conveyor; 5. Motor; 51. Turntable; 52. Hydraulic rod; 53. Liquid storage tank; 531. Epoxy resin adhesive; 6. Placement box; 7. Support frame; 71. Robotic arm; 72. Welding torch; 73. Drive box. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Please refer to the following: Figures 1 to 4 ,in, Figure 1 This is a schematic diagram of the fan blade structure; Figure 2 A schematic diagram of the overall structure of the wind power anti-loosening self-tightening nut provided by this utility model; Figure 3 A schematic cross-sectional view of the overall anti-loosening self-tightening nut for wind power provided by this utility model; Figure 4 A schematic diagram of the structure of the wind power anti-loosening self-tightening nut and its manufacturing mold provided by this utility model.

[0020] In some embodiments, such as Figures 1 to 3 As shown, a wind turbine anti-loosening self-tightening nut includes a fan blade 12 fixed to the top of a mounting frame 1 and a plurality of nuts B3 installed on the outside of the fan blade 12. The nut is characterized in that a plurality of flexible mounting blocks 111 are fixed to the surface of the fan blade 12, and a plurality of flexible insert blocks 37 are fixed to one side of each of the plurality of nuts B3. One end of each of the plurality of mounting blocks 111 is inserted into the plurality of insert blocks 37. A plurality of engaging components are provided around the outer side of the plurality of nuts B3, and the other end of each of the plurality of engaging components is engaged with the surface of the fan blade 12. Multiple screws 2 are fixed on the surface of the fan blade 12. The inner rings of multiple nuts B3 are threadedly connected to the surface of the multiple screws 2. One end of each screw 2 passes through the inner ring of multiple mounting blocks 111 and is fixedly connected to the surface of the fan blade 12. Mounting plate 11 is fixed to the top of mounting bracket 1, and fan blade 12 is rotatably mounted on one side of mounting plate 11. The mounting plate 11 contains a generator body. The rotor of the generator body is fixedly connected to the disc on the surface of the fan blade 12 via a coupling. When in use, the wind blows the fan blade 12, which converts the wind energy into the kinetic energy of the fan blade 12. When the fan blade 12 rotates, it drives the disc and the rotor of the generator body to rotate, thereby converting the kinetic energy of the fan blade 12 into electrical energy, which is then transmitted to external equipment through wires. Specifically, in use, first tighten nut B3. Nut B3 is threadedly connected to the surface of screw 2. As nut B3 gradually approaches the fan blade 12, one end of insert block 37 is inserted into mounting block 111. Insert block 37 and mounting block 111 are made of rubber. The friction between the rubber is relatively large, but it will not affect the tightening of nut B3. The two engage and deform to compress, which has a certain degree of stickiness, making the fixing of nut B3 more stable and less prone to loosening, thus enhancing the self-locking effect between nut B3 and screw 2. Specifically, by fixing multiple mounting blocks 111 on the surface of the blade 12 and multiple insert blocks 37 on one side of the nut B3, and utilizing the flexible nature of the mounting blocks 111 and insert blocks 37, when the nut B3 is installed, one end of the insert block 37 is inserted into the mounting block 111, so that the nut B3 can fit snugly on the installation position of the blade 12. This greatly enhances the initial connection stability between the nut B3 and the blade 12, effectively reducing the possibility of loosening during subsequent operation due to loose initial installation. In addition, multiple locking components are arranged around the outside of the nut B3, and the other end of the multiple locking components is respectively engaged with the surface of the blade 12. When the nut B3 is subjected to wind load, centrifugal force, and vibration, the locking components can further restrict the rotation and movement of the nut B3, forming a double anti-loosening guarantee with the initial locking effect. Even in extremely harsh natural environments, the nut B3 can remain tight to a certain extent, ensuring the connection strength between the blade 12 and the mounting frame 1, effectively preventing the blade 12 from shaking, ensuring the stable operation of the wind turbine generator, and greatly improving the safety and reliability of the wind power equipment. Furthermore, when disassembling nut B3, simply release the engagement between the locking assembly and the surface of the fan blade 12, and then tighten nut B3. No excessive torque is required, making the operation simple and quick. This greatly reduces the difficulty of maintenance and replacement, solves the problem of bolt or nut damage caused by disassembly difficulties, extends the service life of the equipment, and reduces maintenance costs.

[0021] In some embodiments, reference is made to Figure 2 as well as Figure 3 As shown, multiple locking components include a first mounting plate 31 and a second mounting plate 35. The first mounting plate 31 is fixed to the outside of the nut B3, and the second mounting plate 35 is fixed to the surface of the fan blade 12. A rotating shaft 32 is rotatably provided on the inner wall of the first mounting plate 31. A locking plate 33 is fixed on the surface of the rotating shaft 32. A locking groove 331 is also provided on the side of the locking plate 33 away from the rotating shaft 32. A spring 34 is fixed on the top of the first mounting plate 31. The other end of the spring 34 is fixedly connected to the end of the locking plate 33 near the rotating shaft 32. A locking block 36 is rotatably provided on the inner wall of the second mounting plate 35. A limiting plate 351 for limiting the rotation angle of the locking block 36 is also fixed on one side of the second mounting plate 35. One end of the locking block 36 is engaged with the inner wall of the locking groove 331. The pallet 33 is preferably made of a flexible material, such as flexible plastic, which has a certain elasticity and can undergo a certain elastic deformation.

[0022] Specifically, during installation, first tighten nut B3. Nut B3 is threadedly connected to the surface of screw 2. As nut B3 gradually approaches the fan blade 12, one end of insert block 37 is inserted into mounting block 111. At this time, hold and rotate clamping plate 33. One end of clamping plate 33 rotates on the inner wall of mounting plate 31 through rotating shaft 32. Spring 34 at the bottom of clamping plate 33 undergoes elastic deformation and stretching, aligning the slots 331 on the surface of multiple clamping plates 33 with clamping block 36, so that clamping block 36 is engaged in the slot 331, completing the fastening and fixing, further enhancing the self-locking effect. During disassembly, hold the card plate 33 and disengage the card slots 331 on the surface of the card plate 33 from the card block 36 in sequence. Then, tighten the nut B3 to facilitate disassembly and reuse. Furthermore, for the installation and removal of nut B3, a wrench can be used to tighten nut B3 for installation and removal.

[0023] In some embodiments, reference is made to Figures 2 to 4 As shown, a mold for manufacturing a wind power anti-loosening self-tightening nut includes an upper film frame 4 and a conveyor 41. The upper film frame 4 is located on top of the conveyor 41. A driving mechanism and a pressing mechanism are fixed in sequence on the top of the upper film frame 4. The pressing mechanism is located on one side of the driving mechanism. A liquid storage tank 53, a placement box 6 and a welding assembly are fixed in sequence on the top of the conveyor 41. A nut A20 is placed in the placement box 6. The liquid storage assembly and the placement box 6 are located below the driving mechanism and the pressing mechanism, respectively. The welding assembly is located on one side of the placement box 6. Both the drive mechanism and the pressing mechanism include a motor 5, a turntable 51 and a hydraulic rod 52. Both motors 5 are fixed on the top of the upper film frame 4. The output end of the motor 5 passes through the surface of the upper film frame 4 and is fixedly connected to the top of the turntable 51. The bottom of the turntable 51 is fixedly connected to the top of the hydraulic rod 52. The output ends of both hydraulic rods 52 are fixed with magnets A21. One magnet A21 is located directly above the liquid storage tank 53 and the other magnet A21 is located directly above the placement box 6. The interior of the liquid storage tank 53 is lined with epoxy resin adhesive 531; The welding assembly includes a support frame 7, which is fixed to the top of the conveyor 41. A robotic arm 71 is fixed to the top wall and the inner wall of the support frame 7. A welding torch 72 is also fixed to the inner wall of the support frame 7. A drive box 73 for rotating the nut A20 is also fixed to the bottom wall of the support frame 7. The placement box 6 has two functions: picking up materials and pressing them together.

[0024] The adhesive properties of epoxy resin 531 provide a fixation between nut A20 and magnet A21, preventing displacement of components during subsequent welding. This ensures that nut A20 maintains a stable connection in complex wind power working environments, such as strong winds and vibrations, greatly improving the reliability and service life of the anti-loosening self-tightening nut.

[0025] The automatic transfer of nuts between different processes is achieved through a conveyor 41. One type of conveyor 41 is a conveyor belt equipped with a forward and reverse motor. If a conveyor belt is used, it can be made of rubber, plastic, or canvas, and the surface can be designed to be smooth or patterned to increase friction with the material and prevent slippage during transport. For example, when conveying smooth-surfaced nut components, a patterned conveyor belt is chosen to improve transport stability. Furthermore, the use of the conveyor 41 reduces intermediate steps and manual intervention, improving production efficiency. Simultaneously, this integrated production method facilitates large-scale, standardized production, reducing production costs.

[0026] Specifically, the preparation process includes the following stages: Material handling stage: The conveyor 41 transports the placement box 6 to a suitable position. The drive mechanism above the placement box 6 starts to work. Its motor 5 drives the turntable 51 to rotate, which drives the hydraulic rod 52 and the second magnet A21 to move directly above the placement box 6. Then the hydraulic rod 52 extends downward, so that the second magnet A21 approaches the nut A inside the placement box 6 and attracts the nut A20 by magnetic force. Then the hydraulic rod 52 retracts and lifts the nut A20. During the adhesive application stage: The drive mechanism moves the magnet A21, which holds the nut A20, to directly above the liquid storage tank 53. At this time, the hydraulic rod 52 of the pressing mechanism above the liquid storage tank 53 extends downward, pushing the magnet A21 to press the nut A into the epoxy resin adhesive 531 inside the liquid storage tank 53. This coats the surface of the nut A20 with a layer of epoxy resin adhesive, which serves to fix and strengthen the connection. Afterward, the hydraulic rod 52 retracts, and the drive mechanism removes the nut A from the liquid storage tank 53. Welding stage: After bonding, the nut A20 and its components enter the support frame 7 of the welding assembly under the action of the conveyor 41. The drive motor in the drive box 73 is started to rotate and position the nut A20 and its bonded components to ensure accurate welding position. The robotic arm 71 further adjusts the position of the components. Then the welding gun 72 is started to weld the connection between the nut A20 and the fastening assembly. The nut A20 and the fastening assembly are fixed together by welding, and the assembly of the nut A20 is completed.

[0027] Specifically, after assembling nut A20, it becomes nut B3; after assembling magnet A21, it becomes insert block 37.

[0028] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wind turbine anti-loosening self-tightening nut, comprising a fan blade (12) fixed to the top of a mounting bracket (1) and a plurality of nuts B (3) installed on the outside of the fan blade (12), characterized in that, A plurality of flexible mounting blocks (111) are fixed on the surface of the fan blade (12), a plurality of flexible insertion blocks (37) are fixed on one side of each of the plurality of nuts B (3), one end of each of the plurality of mounting blocks (111) is inserted into the plurality of insertion blocks (37) respectively, a plurality of clamping components are annularly arranged on the outer side of the plurality of nuts B (3), and the other ends of the plurality of clamping components are respectively buckled with the surface of the fan blade (12).

2. The wind power anti-loosening self-tightening nut according to claim 1, characterized in that, A plurality of screw rods (2) are fixed on the surface of the fan blade (12), the inner rings of the plurality of nuts B (3) are respectively in threaded connection with the surfaces of the plurality of screw rods (2), and one end of each of the plurality of screw rods (2) respectively passes through the inner rings of the plurality of mounting blocks (111) and is fixedly connected with the surface of the fan blade (12).

3. The self-tightening locking nut for windmill according to claim 2, wherein Each of the plurality of clamping components comprises a first mounting plate (31) and a second mounting plate (35), the first mounting plate (31) is fixed on the outer side of the nut B (3), the second mounting plate (35) is fixed on the surface of the fan blade (12), a rotating shaft (32) is rotatably arranged on the inner wall of the first mounting plate (31), a clamping plate (33) is fixed on the surface of the rotating shaft (32), a clamping groove (331) is further formed on one side of the clamping plate (33) away from the rotating shaft (32), a spring (34) is fixed on the top of the first mounting plate (31), the other end of the spring (34) is fixedly connected with one end of the clamping plate (33) close to the rotating shaft (32), a clamping block (36) is rotatably arranged on the inner wall of the second mounting plate (35), a limiting plate (351) for limiting the rotation angle of the clamping block (36) is further fixed on one side of the second mounting plate (35), and one end of the clamping block (36) is buckled with the inner wall of the clamping groove (331).

4. The wind power anti-loosening self-tightening nut according to claim 3, characterized in that, A mounting plate (11) is fixed on the top of the mounting frame (1), and the fan blade (12) is rotatably arranged on one side of the mounting plate (11).

5. A mold for manufacturing the anti-loosening self-tightening nut for wind power as described in any one of claims 1-4, characterized in that, It comprises an upper film frame (4) and a conveyor (41), the upper film frame (4) is located at the top of the conveyor (41), a driving mechanism and a pressing mechanism are sequentially fixed on the top of the upper film frame (4), the pressing mechanism is located on one side of the driving mechanism, a liquid storage tank (53), a placement box (6) and a welding assembly are sequentially fixed on the top of the conveyor (41), a nut A (20) is placed in the placement box (6), the liquid storage assembly and the placement box (6) are respectively located below the driving mechanism and the pressing mechanism, and the welding assembly is located on one side of the placement box (6).

6. The mold for manufacturing and preparing the anti-loosening self-tightening nut for wind power according to claim 5, characterized in that, The driving mechanism and the pressing mechanism both include a motor (5), a turntable (51) and a hydraulic rod (52). Both motors (5) are fixed to the top of the upper film frame (4). The output end of the motor (5) passes through the surface of the upper film frame (4) and is fixedly connected to the top of the turntable (51). The bottom of the turntable (51) is fixedly connected to the top of the hydraulic rod (52). The output ends of both hydraulic rods (52) are fixed with magnets A2 (21). One magnet A2 (21) is located directly above the liquid storage tank (53), and the other magnet A2 (21) is located directly above the placement box (6).

7. The mold for manufacturing and preparing the anti-loosening self-tightening nut for wind power according to claim 6, characterized in that, The interior of the liquid storage tank (53) is provided with epoxy resin adhesive (531).

8. The mold for manufacturing the self-tightening lock nut for wind power according to claim 7, wherein The welding assembly includes a support frame (7), which is fixed to the top of the conveyor (41). A robotic arm (71) is fixed to the top wall and the inner side wall of the support frame (7). A welding torch (72) is also fixed to the inner side wall of the support frame (7). A drive box (73) for rotating nut A (20) is also fixed to the bottom wall of the support frame (7).

Images