Floating adjustment mechanism for bolt tensioning device

Abstract

The utility model relates to a kind of floating adjusting mechanism for bolt stretching device, include vertical placement floating seat, respectively set in the cantilever floating assembly of floating seat top two sides, set on floating seat and located below cantilever floating assembly rotating support assembly;The cantilever floating assembly includes with the guide rod of vertical placement floating seat, the slider of sliding setting on guide rod, the floating spring of being set on guide rod and being located the two sides of slider respectively;The inner end of guide rod is connected with floating seat by rod end fish eye bearing movably;Two the slider for connecting the upper portion of intelligent stretcher;Rotating support assembly is hinged structure, one end is rotatably connected with floating seat, and the other end is connected with the lower portion of intelligent stretcher by fastener;The utility model can make intelligent stretcher have multiple degree-of-freedom pose compensation, i.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine manufacturing technology, and specifically to a floating adjustment mechanism for a bolt tensioning device. Background Technology

[0002] As the core load-bearing component of a wind turbine generator, the wind turbine hub plays a crucial role in connecting the blades, main shaft, and nacelle. Its structural reliability directly affects the safe operation of the unit under complex conditions such as strong winds and vibrations. During the assembly of the hub and pitch bearing, the bolt tensioning process is a critical step in ensuring uniform preload at the connection interface. Its precision directly impacts the stress distribution and fatigue resistance of the bearing mating surfaces. Traditional manual tensioning methods suffer from uneven preload and low efficiency, while existing solutions using auxiliary tooling still have significant limitations.

[0003] Taking the existing technology CN202411544552.9 as an example, the pitch bearing connecting bolt tensioning fixture disclosed therein, through the combination structure of support frame, rotating beam and tensioner bracket, can support the tensioner. Although it reduces the labor intensity of manual lifting to a certain extent, the tensioner is directly installed on the tensioner bracket. Due to various factors such as processing and installation, it is difficult to ensure that the tensioner and each bolt on the pitch bearing are placed concentrically. If the axis of the tensioner is too far off from the axis of the bolt to be tensioned, the tensioner may not be able to be put on, the direction of tension may be offset and cause jamming, and the tension may be unbalanced and cause bolt deformation. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a floating adjustment mechanism for bolt tensioning devices.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a floating adjustment mechanism for a bolt tensioning device, comprising a vertically placed floating seat, cantilever floating components respectively disposed on both sides of the top of the floating seat, and a rotating support component disposed on the floating seat and located below the cantilever floating components.

[0006] The cantilever floating assembly includes a guide rod placed perpendicular to the floating seat, a slider slidably disposed on the guide rod, and floating springs sleeved on the guide rod and located on both sides of the slider; the inner end of the guide rod is movably connected to the floating seat through a rod end fisheye bearing, and the outer end is provided with a threaded limit end cap; the two sliders are used to connect to the upper part of the intelligent tensioner;

[0007] The rotating support assembly is a hinge structure, with one end rotatably connected to the floating seat and the other end connected to the lower part of the intelligent tensioner via fasteners.

[0008] Preferably, the cantilever floating assembly further includes a connecting seat and a limiting block; the connecting seat is used to connect the rod end fisheye bearing and the floating seat; the limiting block is installed on the connecting seat and forms a limiting hole between the limiting block and the connecting seat; the diameter of the limiting hole is slightly larger than the rod diameter of the rod end fisheye bearing, so that the guide rod can only rotate and swing within the range of motion of the rod end fisheye bearing.

[0009] Preferably, the rotary support assembly includes a connecting disc, a rotating shaft, and a clamp;

[0010] The connecting plate has a stepped hole in the middle and multiple connecting holes for connecting to the floating seat on its edge.

[0011] The rotating shaft is placed coaxially with the connecting plate, with its inner end rotatably set in the stepped hole and its outer end rotatably connected to the clamp.

[0012] The rotation axis of the clamp and the rotating shaft are placed perpendicular to the rotating shaft; the clamp is used to connect the lower part of the intelligent tensioner 7.

[0013] Preferably, the inner end of the rotating shaft is stepped, and a bearing is provided between its small end and the stepped hole; the outer ring of the bearing is positioned at both ends by the stepped hole and the large retaining ring, and the inner ring is positioned by the shaft shoulder and the small retaining ring.

[0014] Preferably, it also includes a vertically placed Z-axis linear module; the Z-axis linear module includes a main slide and a driven slide, wherein the main slide is driven by the linear module, and the driven slide is connected to the main slide through an elastic element;

[0015] The floating seat is mounted on the driven slide.

[0016] Preferably, a quick-change mechanism is also provided between the driven slide and the floating seat; the quick-change mechanism includes a main quick-change seat vertically arranged on the driven slide and a secondary quick-change seat arranged on the back of the floating seat; the main quick-change seat and the secondary quick-change seat are quickly connected by a dovetail groove structure.

[0017] Preferably, the bottom of the main quick-change seat is provided with a limiting plate to prevent the secondary quick-change seat from falling off the main quick-change seat; the side of the secondary quick-change seat is provided with a set screw for abutting against the main quick-change seat.

[0018] Preferably, the elastic element includes an elastic frame disposed on the main slide, a guide post that passes vertically through the elastic frame and is bolted to the main quick-change seat, and a buffer spring sleeved on the guide post and located between the elastic frame and the main quick-change seat.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] 1. This utility model uses a triple mechanism of guide rod floating, slider sliding, and hinge rotation to cover positional deviations in the radial, axial and tilt directions, enabling the intelligent tensioner to have multi-degree-of-freedom posture compensation. That is, it automatically corrects the posture at the moment of contact with the bolt, realizes self-alignment, significantly improves concentricity accuracy, and avoids tension jamming or bolt deformation.

[0021] 2. This utility model is equipped with a Z-axis linear module. Since the driven slide is connected to the main slide through an elastic element, it provides flexible support, avoids rigid impact, and extends the overall service life.

[0022] 3. This utility model is equipped with a quick-change mechanism, which facilitates the rapid replacement of the tension module according to different pitch bearing bolts, achieving "one machine with multiple specifications" compatibility. Attached Figure Description

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0024] Appendix Figure 1 This is a schematic diagram of the floating adjustment mechanism for the bolt tensioning device described in this utility model.

[0025] Appendix Figure 2 This is a schematic diagram of the cantilever floating assembly in this utility model;

[0026] Appendix Figure 3 This is a schematic diagram of the rotating support assembly in this utility model;

[0027] Appendix Figure 4 This is a partial cross-sectional view of the rotary support assembly in this utility model;

[0028] Appendix Figure 5 This utility model includes a Z-axis linear module and a quick-change mechanism.

[0029] Appendix Figure 6 This is a bottom view structural diagram of the floating adjustment mechanism for the bolt tensioning device described in this utility model.

[0030] The components include: 1. Floating seat; 2. Cantilever floating assembly; 21. Guide rod; 22. Slider; 23. Floating spring; 24. Rod end fisheye bearing; 25. Limiting end cap; 26. Connecting seat; 27. Limiting block; 3. Rotary support assembly; 31. Connecting plate; 311. Stepped hole; 312. Countersunk connecting hole; 32. Rotating shaft; 321. Small end; 33. Clamp; 34. Bearing; 35. Large snap ring; 36. Small snap ring; 4. Z-axis linear module; 41. Main slide table; 42. Driven slide table; 5. Elastic element; 51. Elastic frame; 52. Guide post; 53. Buffer spring; 6. Quick change mechanism; 61. Main quick change seat; 62. Driven quick change seat; 63. Set screw; 64. Limiting plate; 7. Intelligent tensioner. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] Appendix Figure 1 The floating adjustment mechanism for the bolt tensioning device described in this utility model includes a vertically placed floating seat 1, cantilever floating components 2 respectively disposed on both sides of the top of the floating seat 1, and a rotating support component 3 disposed on the floating seat 1 and located below the cantilever floating components 2; during operation: through the synergistic effect of the cantilever floating components 2 and the rotating support component 3, multi-degree-of-freedom pose compensation of the intelligent tensioner 7 is achieved.

[0033] Furthermore, such as Figure 2 As shown, the cantilever floating assembly 2 includes a guide rod 21 placed perpendicular to the floating seat 1, a slider 22 slidably disposed on the guide rod 21, and floating springs 23 sleeved on the guide rod 21 and located on both sides of the slider 22. The inner end of the guide rod 21 is movably connected to the floating seat 1 through a rod end fisheye bearing 24, and the outer end is provided with a threaded limiting end cap 25. The two sliders 22 are used to connect the upper part of the intelligent stretcher 7. During operation: the guide rod 21 is movably connected to the floating seat 1 through the rod end fisheye bearing 24, allowing the guide rod 21 to swing within a certain angle range. In addition, the sliders 22 are slidably disposed on the guide rod 21, and floating springs 23 are provided at both ends of the sliders 22, so that the intelligent stretcher 7 can move with multiple degrees of freedom.

[0034] Furthermore, such as Figure 2 As shown, the cantilever floating assembly 2 also includes a connecting seat 26 and a limiting block 27; the connecting seat 26 is used to connect the rod end fisheye bearing 24 and the floating seat 1, making its structure more stable; the limiting block 27 is installed on the connecting seat 26, and a limiting hole is formed between the limiting block 27 and the connecting seat 26; the diameter of the limiting hole is slightly larger than the rod diameter of the rod end fisheye bearing 24, so that the guide rod 21 can only rotate and swing within the range of motion of the rod end fisheye bearing 24, which plays a limiting role and is used to protect the rod end fisheye bearing 24.

[0035] Furthermore, such as Figure 1 As shown, the rotating support component 3 is a hinge structure, with one end rotatably connected to the floating seat 1 and the other end connected to the lower part of the intelligent stretcher 7. During operation, the rotating support component 3 not only provides support, but also allows the intelligent stretcher 7 to adaptively adjust in the front-back, left-right, and tilt directions by rotating the hinge structure in conjunction with the swing of the guide rod 21 of the cantilever floating component 2, thereby achieving multi-dimensional posture correction.

[0036] Furthermore, such as Figure 3As shown, the rotating support assembly 3 includes a connecting plate 31, a rotating shaft 32, and a clamp 33. The connecting plate 31 has a stepped hole 311 in the middle and multiple countersunk connecting holes 312 connected to the floating seat 1 on its edge. The rotating shaft 32 is coaxially placed with the connecting plate 31, with its inner end rotatably disposed in the stepped hole 311 and its outer end rotatably connected to the clamp 33. The rotation axis of the clamp 33 and the rotating shaft 32 is perpendicular to the rotating shaft 32. The clamp 33 is used to connect the lower part of the intelligent tensioner 7. During operation: since the connecting plate 31 is installed on the floating seat, and the rotating shaft 32 is rotatably connected to the clamp 33, and the rotating shaft 32 can rotate on its own, the lower part of the intelligent tensioner 7 can rotate around the axis of the rotating shaft 32 and its vertical direction.

[0037] Furthermore, such as Figure 4 As shown, the inner end of the rotating shaft 32 is stepped, and a bearing 34 is provided between its small end 321 and the stepped hole 311; the two ends of the outer ring of the bearing 34 are respectively positioned by the shoulder of the stepped hole 311 and the large retaining ring 35, and the inner ring is respectively positioned by the shoulder of the small end 321 and the small retaining ring 36; through the above structural design, this utility model is not only easy to process, but also easy to assemble.

[0038] Furthermore, such as Figure 1 and Figure 5 As shown, it also includes a vertically placed Z-axis linear module 4; the Z-axis linear module 4 includes a main slide 41 and a driven slide 42, wherein the main slide 41 is driven by the linear module, while the driven slide 42 is not driven by the linear module, but is only connected to the main slide 41 through the elastic element 5 and slides with the main slide 41.

[0039] The floating seat 1 is mounted on the driven slide 42;

[0040] During operation: When the Z-axis linear module 4 drives the intelligent tensioner 7 to descend and contact the bolt on the pitch bearing, the elastic element 5 not only plays a buffering role, avoiding rigid contact and improving the overall service life, but also enables the intelligent tensioner 7 to have a floating effect.

[0041] Furthermore, such as Figure 1 and Figure 5 As shown, a quick-change mechanism 6 is also provided between the driven slide 42 and the floating seat 1; the quick-change mechanism 6 includes a main quick-change seat 61 vertically arranged on the driven slide 42 and a secondary quick-change seat 62 arranged on the back of the floating seat 1; the main quick-change seat 61 and the secondary quick-change seat 62 are quickly connected by a dovetail groove structure; in this embodiment, the main quick-change seat 61 is provided with a vertically placed dovetail protrusion, and the secondary quick-change seat 62 is provided with a dovetail groove corresponding to the dovetail protrusion; when it is necessary to replace the intelligent tensioner 7 for pitch bearings of different diameters, the dovetail groove on the quick-change seat is fitted onto the dovetail protrusion on the main quick-change seat 61 to achieve quick installation.

[0042] Furthermore, such as Figure 6 As shown, the bottom of the main quick-change seat 61 is provided with a limiting plate 64 to prevent the secondary quick-change seat 62 from falling off the main quick-change seat 61; the side of the secondary quick-change seat 62 is provided with a set screw 63 for abutting against the main quick-change seat 61; this application uses the dual function of the limiting plate 64 and the set screw 63 to fix the secondary quick-change seat 62.

[0043] Furthermore, such as Figure 5 As shown, the elastic element 5 includes an elastic frame 51 mounted on the main slide table 41, a guide post 52 that passes vertically through the elastic frame 51 and is bolted to the main quick-change seat 61, and a buffer spring 53 that is sleeved on the guide post 52 and located between the elastic frame 51 and the main quick-change seat 61. During operation: since the guide post 52 passes vertically through the elastic frame 51 and is bolted to the main quick-change seat 61, it serves to connect the elastic frame 51 and the main quick-change seat 61. The buffer spring 53 is mounted on the guide post 52 between the elastic frame 51 and the main quick-change seat 61. When the Z-axis linear module 4 drives the intelligent tensioner 7 to descend and contact the bolt on the pitch bearing, the guide post 52 can slide upward along the elastic frame 51. At this time, the buffer spring 53 plays a buffering role.

[0044] Furthermore, the intelligent tensioner 7 is existing technology, such as the wind turbine generator hub assembly production line and assembly method disclosed in existing technology CN115890233A, which adds two motors to the traditional tensioner. One motor is used to drive the pull rod to rotate, realizing the connection and disconnection of the pull rod and the bolt; the other motor is used to drive the gear box to automatically lock the nut, eliminating manual operation and improving work efficiency.

[0045] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.

Claims

1. A floating adjustment mechanism for a bolt tensioning device, characterized in that: It includes a vertically placed floating seat, cantilever floating assemblies respectively set on both sides of the top of the floating seat, and a rotating support assembly set on the floating seat and located below the cantilever floating assemblies; The cantilever floating assembly includes a guide rod placed perpendicular to the floating seat, a slider slidably disposed on the guide rod, and floating springs sleeved on the guide rod and located on both sides of the slider; the inner end of the guide rod is movably connected to the floating seat through a rod end fisheye bearing, and the outer end is provided with a threaded limit end cap; the two sliders are used to connect to the upper part of the intelligent tensioner; The rotating support assembly is a hinge structure, with one end rotatably connected to the floating seat and the other end connected to the lower part of the intelligent tensioner via fasteners.

2. The floating adjustment mechanism for a bolt tensioning device according to claim 1, characterized in that: The cantilever floating assembly also includes a connecting seat and a limiting block; the connecting seat is used to connect the rod end fisheye bearing and the floating seat; the limiting block is installed on the connecting seat and forms a limiting hole between the limiting block and the connecting seat; the diameter of the limiting hole is slightly larger than the rod diameter of the rod end fisheye bearing, so that the guide rod can only rotate and swing within the range of motion of the rod end fisheye bearing.

3. The floating adjustment mechanism for a bolt tensioning device according to claim 1, characterized in that: The rotary support assembly includes a connecting disc, a rotating shaft, and a clamp; The connecting plate has a stepped hole in the middle and multiple connecting holes for connecting to the floating seat on its edge. The rotating shaft is placed coaxially with the connecting plate, with its inner end rotatably set in the stepped hole and its outer end rotatably connected to the clamp. The rotation axis of the clamp and the rotating shaft are placed perpendicular to the rotating shaft; the clamp is used to connect the lower part of the intelligent tensioner.

4. The floating adjustment mechanism for a bolt tensioning device according to claim 3, characterized in that: The inner end of the rotating shaft is stepped, and a bearing is provided between its small end and the stepped hole; the outer ring of the bearing is positioned by the stepped hole and the large retaining ring at both ends, and the inner ring is positioned by the shaft shoulder and the small retaining ring.

5. The floating adjustment mechanism for a bolt tensioning device according to any one of claims 1-4, characterized in that: It also includes a vertically placed Z-axis linear module; the Z-axis linear module includes a main slide and a driven slide, wherein the main slide is driven by the linear module, and the driven slide is connected to the main slide through an elastic element; The floating seat is mounted on the driven slide.

6. The floating adjustment mechanism for a bolt tensioning device according to claim 5, characterized in that: A quick-change mechanism is also provided between the driven slide and the floating seat; the quick-change mechanism includes a main quick-change seat vertically arranged on the driven slide and a secondary quick-change seat arranged on the back of the floating seat; the main quick-change seat and the secondary quick-change seat are quickly connected by a dovetail groove structure.

7. The floating adjustment mechanism for a bolt tensioning device according to claim 6, characterized in that: The bottom of the main quick-change seat is provided with a limiting plate to prevent the secondary quick-change seat from falling off the main quick-change seat; the side of the secondary quick-change seat is provided with a set screw to abut against the main quick-change seat.

8. The floating adjustment mechanism for a bolt tensioning device according to claim 6, characterized in that: The elastic element includes an elastic frame mounted on the main slide, a guide post that passes vertically through the elastic frame and is bolted to the main quick-change seat, and a buffer spring sleeved on the guide post and located between the elastic frame and the main quick-change seat.

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