High-strength bolt fastening tool for wind turbine generator

Abstract

The utility model relates to the technical field of wind turbine mechanical engineering provides high -strength bolt fastening frock of wind turbine, including frock body, positioning structure, and elastic coupling structure, frock body is provided with at least two positioning holes, and the adjacent positioning hole forms a limit position on frock body between, two positioning structures are oppositely established, two positioning structures are movably established on frock body, wherein a positioning hole is formed on the elastic coupling structure, a plurality of installation cavities and elastomer are axially provided in the elastic coupling structure, a plurality of installation cavities are arranged along the circumferential direction of the elastic coupling structure, and the elastomer is arranged in the installation cavity. The utility model can adapt to the blade bolt with flat protrusion, so as to solve the problem that the existing electric wrench cannot directly apply pre-tightening force to the blade bolt, the fastening frock can be used with electric or pneumatic tool, thereby realizing mechanization, automatic fastening operation.

Description

Technical Field

[0001] This utility model relates to the technical field of wind turbine mechanical engineering, specifically to high-strength bolt fastening fixtures for wind turbines. Background Technology

[0002] In recent years, with technological advancements and industry development, grid parity for large-megawatt wind turbines has become a significant trend in the wind power industry. To achieve this goal, turbine manufacturers and component suppliers are taking measures to reduce costs in various ways, including but not limited to design optimization, selecting more cost-effective raw materials, and improving manufacturing processes.

[0003] In wind turbines, the blades are one of the key components for capturing wind energy. The connection between the blades and the pitch bearings and hub must be sufficiently robust and reliable to ensure the safe and stable operation of the entire system. In wind turbine design and assembly practice, high-strength double-ended bolts are typically used at the blade root to connect the blade to the hub. In standard industry designs, the exposed end of the double-ended bolt (i.e., the end exposed on the blade flange) often has an internal hexagonal groove to facilitate tightening or loosening using standard tools.

[0004] However, in certain specific projects or high-end testing needs, due to the process requirements of non-destructive testing (NDT), especially when bolt phased array ultrasonic testing technology is required for periodic health monitoring of leaf root bolts, the bolt design has changed. To ensure good coupling and signal penetration of the phased array probe to the bolt end face, the design requires that the exposed head of the bolt must have a smooth, flat structure (as per the instruction manual). Figure 1 As shown, this design features a flat surface without internal or external hexagonal protrusions (i.e., no raised or recessed structures). While this planar design improves inspection accuracy and reliability, it also presents a critical problem: the bolt loses the mechanical structure that allows it to be held with conventional tools, making direct tightening or loosening impossible. Therefore, achieving efficient and reliable bolt tightening and loosening under these conditions becomes a pressing issue. Utility Model Content

[0005] This utility model provides a high-strength bolt fastening fixture for wind turbine units to solve the problems existing in the background art. The specific implementation method is as follows:

[0006] A high-strength bolt fastening fixture for wind turbine units includes a fixture body, wherein the fixture body has at least two positioning holes, and a finite positioning surface is formed on the fixture body between adjacent positioning holes.

[0007] The positioning structure is provided in two opposite positions, and the two positioning structures are movably mounted on the tooling body.

[0008] An elastic coupling structure, wherein a positioning hole is formed on the elastic coupling structure, and multiple mounting cavities and an elastic body are provided axially inside the elastic coupling structure. The multiple mounting cavities are spaced apart along the circumferential direction of the elastic coupling structure, and the elastic body is disposed in the mounting cavity.

[0009] As a further embodiment of this utility model, both positioning structures have contact surfaces, and the two contact surfaces respectively abut against both sides of the blade bolt end face to confine the blade bolt in the positioning hole.

[0010] As a further embodiment of this utility model, the positioning structure includes a control rod and a slider rotatably connected to the control rod. The control rod is threadedly connected to the tooling body. Under the action of external force, the control rod drives the slider to move radially so that the slider abuts against the blade bolt.

[0011] As a further embodiment of this utility model, a limiting rod is provided on the slider, and a guide hole is provided on the tooling body corresponding to the limiting rod, and the limiting rod is slidably disposed in the guide hole.

[0012] As a further embodiment of this utility model, the control rod is provided with an elastic element, the two ends of which abut against the slider and the tooling body respectively.

[0013] As a further embodiment of this utility model, the flexible coupling structure includes a slave coupling sleeve and a main coupling sleeve integral with the tooling body. The main coupling sleeve and the slave coupling sleeve each include a plurality of protruding teeth distributed axially along the outer edge of the circumference of the tooling body. The protruding teeth of the main coupling sleeve and the slave coupling sleeve are interlocked with each other, and an installation cavity is reserved between the interlocking protruding teeth. The elastic body is disposed in the installation cavity.

[0014] As a further embodiment of this utility model, the main coupling sleeve and / or the meshing surface of the coupling sleeve are provided with mounting holes, the mounting holes corresponding to the mounting cavity arrangement, and at least a portion of the elastomer is inserted into the mounting holes.

[0015] As a further embodiment of this utility model, the main coupling sleeve is provided with a first connecting member, and the slave coupling sleeve is provided with a second connecting member. The first connecting member and the second connecting member are locked together by fasteners.

[0016] As a further embodiment of this utility model, a plurality of fasteners are provided, and the plurality of fasteners are spaced apart along the main coupling sleeve and / or from the circumferential direction of the coupling sleeve.

[0017] As a further embodiment of this utility model, the fastener includes a bolt and a nut that mates with the bolt. Both the first connecting member and the second connecting member have shaft holes. The bolt passes through the shaft holes and mates with the nut to achieve a locking connection between the first connecting member and the second connecting member.

[0018] Due to the adoption of the above technical solutions, the beneficial technical effects of this utility model are:

[0019] 1. This utility model can be adapted to blade bolts with flat protrusions to solve the problem that existing electric wrenches cannot directly apply pre-tightening force to blade bolts. The fastening fixture can be used in conjunction with electric or pneumatic tools to realize mechanized and automated fastening operations.

[0020] 2. This utility model integrates an elastic coupling structure to transmit torque and utilizes an elastic body to absorb vibration impact and instantaneous overload stress, effectively alleviating the damage of impact loads to blade bolts, thereby helping to reduce the risk of fatigue fracture of blade bolts caused by alternating loads during long-term operation and extending their service life.

[0021] 3. This utility model uses a positioning structure to clamp the flat protrusion of the blade bolt, which can be adapted to various specifications of blade bolts with flat head structures. There is no need to equip each specification of bolt with special tools, thereby reducing the cost of equipment procurement and inventory management. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a high-strength bolt in the background art of this utility model;

[0023] Figure 2 This is a schematic diagram of the high-strength bolt fastening fixture for the wind turbine unit in a specific embodiment of this utility model;

[0024] Figure 3 This is a cross-sectional view of the high-strength bolt fastening fixture for the wind turbine unit in a specific embodiment of this utility model;

[0025] Figure 4 This is a diagram showing the working state of the positioning structure in a specific embodiment of this utility model;

[0026] Figure 5 This is an exploded view of the high-strength bolt fastening fixture for the wind turbine unit in a specific embodiment of this utility model;

[0027] Figure 6 This is a partial enlarged view of the high-strength bolt fastening fixture for the wind turbine unit in a specific embodiment of this utility model.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Blade bolt; 101. Flat protrusion; 200. Fastening fixture.

[0030] 1. Tooling body; 2. Positioning structure; 3. Coupling sleeve; 4. First positioning hole; 5. Bolt; 6. First spring; 7. Nut; 8. Elastomer; 9. Chamfer;

[0031] 11. Second positioning hole; 12. Limiting surface; 13. Mounting hole; 14. First connector; 15. First protruding tooth; 16. First arc-shaped groove.

[0032] 21. Control lever, 22. Control wheel, 23. Slider, 24. Elastic element, 25. Limiting rod.

[0033] 31. Second connector; 32. Second protruding tooth; 33. Second arc-shaped groove.

[0034] 81. Elastomer body; 82. Connector. Detailed Implementation

[0035] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples:

[0036] It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0037] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0038] Combination Figure 1 As shown, a flat protrusion 101 with a perpendicular cylindrical end face extends from the cylindrical end face of the blade bolt 100, so that the blade bolt 100 forms a bolt head with a flat head structure. This flat protrusion 101 is mainly to meet the requirements of non-destructive testing (NDT), especially when using phased array ultrasonic testing technology, where a smooth surface is required to ensure good coupling and signal penetration. However, because the flat protrusion 101 differs from traditional internal or external hexagonal recesses, it is difficult to directly connect and apply torque with a conventional electric wrench. Therefore, this utility model provides a high-strength bolt fastening fixture for wind turbine units, such as... Figure 2As shown, the fastening fixture 200 includes a fixture body 1, a positioning structure 2, and an elastic coupling structure. The fixture body 1 has an annular structure and at least two positioning holes, namely a first positioning hole 4 and a second positioning hole 11, which are located opposite each other at the top and bottom ends of the fixture body 1. The first positioning hole 4 is used to position the output shaft of the electric wrench, and the second positioning hole 11 is used to position the head of the blade bolt 100, ensuring that the fastening fixture 200 can firmly clamp the bolt. A limiting surface 12 is formed on the fixture body 1 between adjacent positioning holes. The limiting surface 12 cooperates with the end face of the blade bolt 100 and the end face of the output shaft of the electric wrench to play an axial limiting role.

[0039] Preferably, both the first positioning hole 4 and the second positioning hole 11 have a chamfer 9. The chamfer 9 is located at the axial end face entrance of the first positioning hole 4 and the second positioning hole 11, and has a tapered structure that gradually narrows towards the inside of the hole. The chamfer 9 plays a guiding role during the connection process. When the output shaft of the electric wrench is inserted into the first positioning hole 4, or the flat protrusion 101 of the blade bolt 100 is inserted into the second positioning hole 11, the chamfer 9 can effectively guide the shaft center alignment, reduce assembly deviation, and improve installation efficiency.

[0040] In one specific embodiment, such as Figure 3 As shown, the positioning structure 2 is disposed within the second positioning hole 11 to confine the blade bolt 100 within the second positioning hole 11. Two positioning structures 2 are provided opposite each other, and the two positioning structures 2 are movably disposed on the tooling body 1. The two positioning structures 2 are symmetrically disposed on the tooling body 1 and can be adjusted radially along the tooling body 1. Through this radial adjustment function, the two positioning structures 2 can simultaneously clamp the blade bolt 100, thereby ensuring that the blade bolt 100 is subjected to uniform force during the tightening process, effectively avoiding preload deviation or thread damage caused by uneven clamping. In addition, this radial adjustment function allows the fastening tooling 200 to adapt to various specifications of blade bolts 100. By adjusting the distance between the two positioning structures 2, the fastening tooling 200 can accommodate flat protrusions 101 of different widths, thereby significantly improving the versatility and flexibility of the fastening tooling 200 and meeting the actual needs of multi-model and multi-specification bolt assembly in wind power sites.

[0041] In this embodiment, the positioning structure 2 includes a control rod 21 and a slider 23 rotatably connected to the control rod 21. The control rod 21 is threadedly connected to the tooling body 1. Under the action of external force, the control rod 21 drives the slider 23 to move radially so that the slider 23 abuts against the blade bolt 100. The tooling body 1 is provided with a corresponding radially extending threaded hole, and the control rod 21 passes through the threaded hole and is threadedly engaged with it. When the operator rotates the control rod 21, the control rod 21 moves radially along the tooling body 1 under the action of the thread, and drives the slider 23 connected to it to move synchronously towards or away from the center, thereby realizing the clamping or loosening of the slider 23 on the end face of the blade bolt 100. In addition, for easy manual adjustment, the end of the control rod 21 is provided with a control wheel 22. The control wheel 22 can be a knurled round wheel structure, which is convenient for the operator to hold and apply rotational torque, thereby significantly improving the ease of operation and efficiency of the fastening tooling 200 during use.

[0042] In this embodiment, both positioning structures 2 have contact surfaces, which abut against both sides of the end face of the blade bolt 100 to confine the blade bolt 100 within the positioning hole. Specifically, the contact surface of the positioning structure 2 is formed on the slider 23 and is designed as a plane matching the shape of the upper flat protrusion 101, with its width, height, and relative position corresponding to the groove wall of the groove 101. When the positioning structure 2 moves radially along the tooling body 1, the two positioning structures 2 move closer to the center of the tooling body 1, allowing the contact surfaces to fit tightly against and abut against the side wall of the groove 101, forming a stable surface contact connection. This confines the blade bolt 100 within the second positioning hole 11, preventing the blade bolt 100 from rotating or moving axially during tightening, and ensuring that the torque is evenly transmitted from the tooling body 1 to the blade bolt 100, avoiding stress concentration.

[0043] Furthermore, the slider 23 is rotatably connected to the control rod 21, allowing the slider 23 to automatically adjust its angle during movement to ensure that its contact surface always maintains good contact with the side wall of the groove 101 of the blade bolt 100, avoiding point contact or off-center loading caused by assembly deviation, and improving the stability and reliability of clamping.

[0044] In this embodiment, as Figure 4As shown, the slider 23 is provided with a limiting rod 25, and the tooling body 1 has a guide hole corresponding to the limiting rod 25. The limiting rod 25 is slidably disposed in the guide hole. There are two limiting rods 25, which are symmetrically arranged on both sides of the control rod 21, so that the movement of the slider 23 is restricted within the path defined by the guide hole, ensuring that it moves smoothly and linearly in the radial direction of the tooling body 1, effectively preventing the slider 23 from deflecting, jamming or twisting during the movement. In addition, the cooperation between the limiting rod 25 and the guide hole plays a guiding and supporting role, thereby improving the accuracy and repeatability of the movement of the positioning structure 2, ensuring that the sliders 23 of the two positioning structures 2 clamp the blade bolts 100 synchronously and symmetrically, and avoiding uneven force or clamping failure caused by movement deviation.

[0045] In this embodiment, the control rod 21 is provided with an elastic element 24, the two ends of which abut against the slider 23 and the tooling body 1, respectively. Preferably, the elastic element 24 is a spring, which is sleeved on the outer periphery of the control rod 21, with one end connected to the slider 23 and the other end connected to the inner wall of the second positioning hole 11 on the tooling body 1. When the control rod 21 rotates and drives the slider 23 to move in the direction of the blade bolt 100, the spring is compressed; after clamping is completed, the spring maintains a certain pre-compression state and continuously provides a rebound force.

[0046] In one specific embodiment, to achieve efficient docking with the electric wrench and ensure the stability and reliability of torque transmission, a positioning hole is formed on the elastic coupling structure. The elastic coupling structure has multiple mounting cavities and elastic bodies 8 axially arranged within it. The mounting cavities are spaced apart along the circumferential direction of the elastic coupling structure, and the elastic bodies 8 are disposed within the mounting cavities. Specifically, the positioning hole is a first positioning hole 4, which is a quadrilateral structure used to position the output shaft of the electric wrench, thereby ensuring the directness and stability of power transmission. Preferably, multiple mounting cavities are provided, and each mounting cavity contains an elastic body 8. This elastic body 8 can absorb vibration and mitigate impact during tightening, which not only improves the smoothness of torque transmission but also reduces mechanical impact on the blade bolt 100, lowering the risk of damage to the blade bolt 100 due to stress concentration.

[0047] In this embodiment, as Figure 5As shown, the flexible coupling structure includes a driven coupling sleeve 3 and a main coupling sleeve integral with the tooling body 1. The main coupling sleeve and the driven coupling sleeve 3 each include multiple convex teeth axially distributed along the outer edge of the tooling body 1. The convex teeth of the main coupling sleeve and the driven coupling sleeve 3 interlock, and a ring-shaped array of mounting cavities is reserved between the interlocking convex teeth. The elastic body 8 is disposed in the mounting cavity. The elastic body 8 can be a buffer element made of rubber, polyurethane, or other elastic and wear-resistant polymer materials. The main coupling sleeve is integrally formed with the tooling body 1, and the driven coupling sleeve 3 is detachably connected to the main coupling sleeve. The connecting portion of the main coupling sleeve and the driven coupling sleeve 3 is provided with multiple convex teeth, including a first convex tooth 15 on the tooling body 1 and a second convex tooth 32 on the driven coupling sleeve 3. The first convex tooth 15 and the second convex tooth 32 are staggered and interlock, and a ring-shaped array of mounting cavities is reserved between the interlocking first convex tooth 15 and the second convex tooth 32. Each mounting cavity is composed of a first arc-shaped groove 16 and a second arc-shaped groove 33, used to accommodate the elastic body 8. The outer wall of the elastic body 8 is tightly fitted with the first arc-shaped groove 16 and the second arc-shaped groove 33, respectively, to ensure that vibration and impact can be effectively absorbed during torque transmission and to maintain a stable position. The main coupling sleeve and the driven coupling sleeve 3 achieve efficient torque transmission through the mechanical meshing of the convex teeth. The presence of the elastic body 8 gives the elastic coupling structure a certain degree of flexibility and buffering capacity, thereby reducing the direct impact on the blade bolt 100 and reducing the risk of fatigue damage. Furthermore, due to the small gap between the first convex tooth 15 and the second convex tooth 32 and the deformation characteristics of the elastic body 8, this elastic coupling structure can compensate for misalignment between the tool and the fastening fixture 200 within a certain range, thereby improving assembly accuracy and reliability.

[0048] In actual operation, when the electric or pneumatic tool drives the coupling sleeve 3 to rotate, the torque is transmitted to the first convex tooth 15 through the second convex tooth 32, and then drives the entire tool body 1 to rotate through the main coupling sleeve, thus completing the tightening of the blade bolt 100. The elastic body 8 absorbs vibration and impact during this process, ensuring smooth power transmission and reducing damage to the blade bolt 100.

[0049] Furthermore, the main coupling sleeve and / or the meshing surface of the coupling sleeve 3 are provided with mounting holes 13, the mounting holes 13 corresponding to the mounting cavity arrangement, and at least a portion of the elastomer 8 is inserted into the mounting holes 13. The elastomer 8 includes a cylindrical elastomer body 81 and a connector 82, the connector 82 being axially disposed on the elastomer body 81, and the tooling body 1 having mounting holes 13 corresponding to the connector 82, the connector 82 being inserted into the mounting holes 13, thereby achieving the installation and positioning of the elastomer 8.

[0050] In one specific embodiment, to ensure a stable connection between the main coupling sleeve and the driven coupling sleeve 3 and to achieve effective torque transmission, the main coupling sleeve and the driven coupling sleeve 3 are locked together by fasteners. Specifically, the main coupling sleeve is provided with a first connecting member 14, which has a disc-shaped structure and multiple shaft holes evenly distributed along the circumference. The driven coupling sleeve 3 is provided with a second connecting member 31, which also has a corresponding shaft hole corresponding to the first connecting member 14. The first connecting member 14 and the second connecting member 31 are connected and locked by fasteners passing through the corresponding shaft holes. When the fasteners are tightened, the first connecting member 14 and the second connecting member 31 fit tightly together, thereby axially pressing the main coupling sleeve and the driven coupling sleeve 3 together, so that the protrusions on both (i.e., the first protrusion 15 and the second protrusion 32) are fully engaged and maintain a stable meshing state.

[0051] In this embodiment, multiple fasteners are provided, and these fasteners are spaced apart along the circumferential direction of the main coupling sleeve and / or the secondary coupling sleeve 3. The multiple fasteners are arranged in a ring array along the circumferential direction. The fasteners pass through the corresponding shaft holes between the first connecting member 14 on the main coupling sleeve and the second connecting member 31 on the secondary coupling sleeve 3, achieving axial clamping and circumferential fixation of both, thereby ensuring uniform stress distribution in the connection area and preventing structural deformation or loosening due to localized stress concentration.

[0052] In this embodiment, the fastener includes a bolt 5 and a nut 7 that mates with the bolt 5. Both the first connecting member 14 and the second connecting member 31 have shaft holes. The bolt 5 passes through the shaft hole and mates with the nut 7 to achieve a locking connection between the first connecting member 14 and the second connecting member 31. During assembly, the bolt 5 passes through the corresponding shaft holes on the first connecting member 14 and the second connecting member 31 in sequence and screws onto the nut 7 for locking. By tightening the bolt 5 and the nut 7, the first connecting member 14 and the second connecting member 31 are axially pressed together, thereby firmly connecting the main coupling sleeve and the driven coupling sleeve 3.

[0053] Preferably, a first spring 6 is connected between the first connecting member 14 and the second connecting member 31. The first spring 6 is a compression spring, and its number corresponds one-to-one with the bolts 5. Each first spring 6 is respectively sleeved on the corresponding bolt 5. One end of the first spring 6 abuts against the end face of the first connecting member 14, and the other end abuts against the end face of the second connecting member 31. During the process of the bolt 5 passing through the shaft hole and being locked with the nut 7, the first spring 6 is axially compressed and enters a pre-compression state, thereby continuously applying an elastic clamping force between the connecting parts.

[0054] The working principle of this utility model is as follows: During use, the second positioning hole 11 on the tooling body 1 is aligned with the flat protrusion 101 of the blade bolt 100, allowing the bolt head to enter the second positioning hole 11. The operator rotates the control lever 21, and the radial movement of the slider 23 firmly clamps the blade bolt 100 in the positioning hole. Next, the output shaft of the electric wrench is inserted into the first positioning hole 4, and the electric wrench is activated. The torque is transmitted from the coupling sleeve 3 to the main coupling sleeve, and then applied to the blade bolt 100 via the tooling body 1. During the tightening process, the elastic body 8 absorbs vibration and impact, reducing mechanical damage to the blade bolt 100 and the tooling body 1. Furthermore, the first spring 6 maintains an appropriate preload to prevent the bolt 5 and nut 7 from loosening due to vibration, ensuring the connection stability of the main coupling sleeve and the driven coupling sleeve 3. After reaching the preset torque, the electric wrench stops working, the control lever 21 is released, the slider 23 is released, the tooling is removed, and the tightening operation is completed. The fastening fixture 200 enables safe and efficient fastening of the blade bolts 100, and can also effectively reduce the risk of fatigue fracture of the blade bolts 100, thereby extending their service life.

[0055] Many other changes and modifications can be made without departing from the concept and scope of this utility model. It should be understood that this utility model is not limited to the specific embodiments, and the scope of this utility model is defined by the appended claims.

Claims

1. A high-strength bolt fastening fixture for wind turbine generators, characterized in that, Includes a tooling body (1), the tooling body (1) having at least two positioning holes, and a finite positioning surface (12) is formed on the tooling body (1) between adjacent positioning holes. Positioning structure (2), two positioning structures (2) are provided opposite to each other, and the two positioning structures (2) are movably provided on the tooling body (1); An elastic coupling structure, wherein a positioning hole is formed on the elastic coupling structure, and multiple mounting cavities and an elastic body (8) are provided axially inside the elastic coupling structure. The multiple mounting cavities are arranged at intervals along the circumferential direction of the elastic coupling structure, and the elastic body (8) is disposed in the mounting cavity.

2. The high-strength bolt fastening fixture for wind turbine units according to claim 1, characterized in that, Both positioning structures (2) have contact surfaces, which abut against the two sides of the end face of the blade bolt (100) to confine the blade bolt (100) in the positioning hole.

3. The high-strength bolt fastening fixture for wind turbine units according to claim 1, characterized in that, The positioning structure (2) includes a control rod (21) and a slider (23) rotatably connected to the control rod (21). The control rod (21) is threadedly connected to the tool body (1). Under the action of external force, the control rod (21) drives the slider (23) to move radially so that the slider (23) abuts against the blade bolt (100).

4. The high-strength bolt fastening fixture for wind turbine units according to claim 3, characterized in that, The slider (23) is provided with a limiting rod (25), and the tooling body (1) is provided with a guide hole corresponding to the limiting rod (25). The limiting rod (25) is slidably disposed in the guide hole.

5. The high-strength bolt fastening fixture for wind turbine units according to claim 3, characterized in that, The control rod (21) is provided with an elastic element (24), and the two ends of the elastic element (24) abut against the slider (23) and the tooling body (1) respectively.

6. The high-strength bolt fastening fixture for wind turbine units according to claim 1, characterized in that, The elastic coupling structure includes a slave coupling sleeve (3) and a main coupling sleeve integrated with the tooling body (1). The main coupling sleeve and the slave coupling sleeve (3) each include a plurality of protruding teeth distributed axially along the outer edge of the circumference of the tooling body (1). The protruding teeth of the main coupling sleeve and the slave coupling sleeve (3) are interlocked with each other, and an installation cavity is reserved between the interlocking protruding teeth. The elastic body (8) is disposed in the installation cavity.

7. The high-strength bolt fastening fixture for wind turbine units according to claim 6, characterized in that, The main coupling sleeve and / or the meshing surface of the coupling sleeve (3) are provided with mounting holes (13), the mounting holes (13) correspond to the mounting cavity arrangement, and at least a portion of the elastomer (8) is inserted into the mounting holes (13).

8. The high-strength bolt fastening fixture for wind turbine units according to claim 6, characterized in that, The main coupling sleeve is provided with a first connecting member (14), and the slave coupling sleeve (3) is provided with a second connecting member (31). The first connecting member (14) and the second connecting member (31) are locked together by fasteners.

9. The high-strength bolt fastening fixture for wind turbine units according to claim 8, characterized in that, The fasteners are provided in multiple quantities, and the multiple fasteners are arranged at intervals along the main coupling sleeve and / or from the circumferential direction of the coupling sleeve (3).

10. The high-strength bolt fastening fixture for wind turbine units according to claim 8, characterized in that, The fasteners include a bolt (5) and a nut (7) that engages with the bolt (5). The first connector (14) and the second connector (31) are both provided with shaft holes. The bolt (5) passes through the shaft holes and engages with the nut (7) to achieve a locking connection between the first connector (14) and the second connector (31).

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