Screw mounting tool

Abstract

The utility model provides a screw mounting tool, and belongs to the technical field of wind turbine generator overhauling, the screw mounting tool comprises an electric wrench, a sleeve and a nut, the nut is matched with a screw, the nut is connected with the electric wrench through the sleeve, a driving shaft, the sleeve and the nut are coaxially arranged, the driving shaft is connected with the screw through the nut, and the driving shaft is connected with the screw through the nut. The screw rod and the driving shaft coaxially rotate, so that the screw rod is quickly screwed into a mounting screw hole in the wind turbine generator set through rotation of the nut, the mounting efficiency of the screw rod is improved, and the labor intensity of workers is reduced; through cooperation of the nut and the screw rod, the combination stability of the screw rod and the installation tool is guaranteed, damage to the first external thread when the installation tool is used can be avoided, and the integrity of the first external thread is guaranteed.

Description

A screw installation tool Technical Field

[0001] This application belongs to the field of wind turbine maintenance technology, specifically relating to a screw installation tool. Background Technology

[0002] When replacing the main bearing of a GE 1.5MW wind turbine, the connecting bolts of all connecting components also need to be replaced simultaneously. Replacing the connecting bolts between the hub and the main shaft is particularly challenging due to their large size and numerous quantity. Manual installation is typically required, taking 4-5 maintenance personnel approximately one hour. This expends significant physical effort and time, delaying the overall replacement process, increasing downtime, and impacting the turbine's power generation. Furthermore, because the bolts have a tight fit with the turbine's mounting holes, using existing installation tools can easily damage the bolt's external threads, rendering the entire bolt unusable. This necessitates the removal of the damaged bolt, increasing maintenance costs and reducing efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] In view of this, a screw installation tool is proposed according to an embodiment of this application, comprising:

[0005] Electric wrench, including a drive shaft;

[0006] A sleeve, the first end of which is detachably connected to the drive shaft, and the sleeve and the drive shaft are coaxially arranged.

[0007] The nut is fixedly connected to the second end of the sleeve, and the nut and the sleeve are coaxially arranged.

[0008] The inner wall of the nut is provided with a first internal thread, and the outer wall of the screw is provided with a first external thread. The first internal thread and the first external thread are matched.

[0009] In one feasible implementation, the nut includes a threaded hole, and a first internal thread is provided on the inner wall of the threaded hole;

[0010] The sleeve covers at least part of the threaded hole so that when the nut is screwed into the screw, the end face of the screw away from the unit abuts against the sleeve.

[0011] In one feasible implementation, the inner diameter of the second end of the sleeve is smaller than the diameter of the threaded hole.

[0012] In one feasible implementation, the nut is welded to the sleeve.

[0013] In one feasible implementation, the weld height between the nut and the sleeve is no more than 3 mm.

[0014] In one feasible implementation, the screw mounting tool further includes:

[0015] Limiting holes are provided on the side wall of the drive shaft;

[0016] The connecting hole penetrates the side wall of the sleeve and is coaxial with the limiting hole;

[0017] The positioning component passes through the connecting hole and is then embedded in the limiting hole, and is connected to the sleeve.

[0018] In one feasible implementation, the positioning component includes:

[0019] The limiting rod has its first end embedded in the limiting hole and its second end embedded in the connecting hole.

[0020] The fixing part is detachably connected to the sleeve.

[0021] An elastic element is disposed between the fixed part and the limiting rod. The first end of the elastic element is connected to the limiting rod, and the second end of the elastic element is connected to the fixed part. The elastic element applies a pushing force to the limiting rod, causing the limiting rod to press against the drive shaft.

[0022] In one feasible implementation, a second internal thread is provided on the inner wall of the connecting hole, and a second external thread is provided on the side wall of the fixing part, with the fixing part threadedly connected to the connecting hole.

[0023] In one feasible implementation, the screw installation tool further includes a limiting component, the first end of which is rotatably connected to the nut, and the second end of which extends away from the electric wrench. The limiting component abuts against the mounting surface to limit the screw tightening depth.

[0024] In one feasible implementation, the limiting component includes:

[0025] A connecting part is provided along the circumference of the nut and is fixedly connected to the outer wall of the nut;

[0026] The slewing bearing is fitted onto the outside of the nut, and the first end of the slewing bearing is connected to the end face of the connecting part that is away from the electric wrench.

[0027] The connecting ring is fitted onto the outside of the nut and is connected to the second end of the slewing bearing.

[0028] A support rod is provided, which is parallel to the axis of the nut, and the first end of the support rod is connected to the connecting ring.

[0029] The contact ring is connected to the second end of the support rod.

[0030] The screw installation tool of this application has the following advantages compared with the prior art:

[0031] The screw installation tool provided in this application includes an electric wrench, a socket, and a nut. The nut is adapted to the screw, and the nut and electric wrench are connected through the socket. The drive shaft, socket, and nut are coaxially arranged. The nut is connected to the screw so that the screw rotates coaxially with the drive shaft. The rotation of the nut allows the screw to be quickly screwed into the mounting screw hole on the wind turbine, improving the installation efficiency of the screw and reducing the intensity of manual labor. The cooperation between the nut and the screw not only ensures the stability of the connection between the screw and the installation tool, but also avoids damage to the first external thread during the use of the installation tool, ensuring the integrity of the first external thread. Attached Figure Description

[0032] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0033] Figure 1 is a schematic structural diagram of the screw installation tool according to an embodiment of this application at the first angle;

[0034] Figure 2 is a schematic structural diagram of a screw installation tool according to an embodiment of this application from a second angle;

[0035] Figure 3 is an enlarged view of point A in Figure 1;

[0036] Figure 4 is an enlarged view of section B in Figure 2;

[0037] The correspondence between the reference numerals and component names in Figures 1 to 4 is as follows:

[0038] 1. Electric wrench;

[0039] 11. Drive shaft; 12. Sleeve; 13. Nut; 14. Limiting hole; 15. Connecting hole; 16. Positioning assembly; 17. Limiting assembly; 18. Screw; 19. Threaded hole; 20. Inner hole at the second end of the sleeve;

[0040] 161. Limiting rod; 162. Fixing part; 163. Elastic element;

[0041] 171. Connecting part; 172. Slewing bearing; 173. Connecting ring; 174. Support rod; 175. Contact ring. Detailed Implementation

[0042] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0046] As shown in Figures 1 and 2, according to an embodiment of this application, a screw 18 installation tool is proposed, including: an electric wrench 1, a socket 12, and a nut 13; the electric wrench 1 includes a drive shaft 11; the first end of the socket 12 is detachably connected to the drive shaft 11, and the socket 12 and the drive shaft 11 are coaxially arranged; the nut 13 is fixedly connected to the second end of the socket 12, and the nut 13 and the socket 12 are coaxially arranged; the inner wall of the nut 13 is provided with a first internal thread, and the outer wall of the screw 18 is provided with a first external thread, the first internal thread and the first external thread being adapted to each other.

[0047] The screw 18 installation tool provided in this embodiment includes an electric wrench 1, a socket 12, and a nut 13. The nut 13 is adapted to the screw 18, and the nut 13 and the electric wrench 1 are connected through the socket 12. The drive shaft 11, the socket 12, and the nut 13 are coaxially arranged. The nut 13 is connected to the screw 18 so that the screw 18 rotates coaxially with the drive shaft 11. Then, by rotating the nut 13, the screw 18 is quickly screwed into the mounting screw hole on the wind turbine, improving the installation efficiency of the screw 18 and reducing the intensity of manual labor. The cooperation between the nut 13 and the screw 18 not only ensures the stability of the connection between the screw 18 and the installation tool, but also avoids damage to the first external thread when using the installation tool, and eliminates the need to groove the end face of the screw 18, thus ensuring the integrity of the first external thread.

[0048] It should be noted that the connecting screw 18 of the wind turbine is relatively large in size and weight, and the fit between the screw 18 and the mounting screw hole is quite tight. When using existing installation tools, the tool needs to clamp the screw 18 tightly in order to rotate it. If the clamping force is too small, the screw 18 is prone to slipping; if the clamping force is too large, damage to the external threads on the screw 18 is inevitable. This application utilizes the threaded fit between the nut 13 and the screw 18 to avoid damage to the external threads of the screw 18 by the tool, and to ensure the stability of the connection between the tool and the screw 18, as well as the synchronicity of the rotation of the screw 18 and the nut 13.

[0049] Understandably, driving the electric wrench 1 to reverse the drive shaft 11 will allow the nut 13 to be removed from the screw 18. Since the screw 18 fits tightly with the mounting screw hole and the length of the screw 18 screwed into the mounting screw hole is relatively long, the screw 18 does not rotate with the nut 13 when the nut 13 rotates in the reverse direction, so that the tool can be quickly separated from the screw 18 after the screw 18 is installed.

[0050] As shown in Figure 1, in one feasible embodiment, the nut 13 includes a threaded hole 19, and a first internal thread is provided on the inner wall of the threaded hole 19; the sleeve 12 covers at least part of the threaded hole 19 so that when the nut 13 is screwed with the screw 18, the end face of the screw 18 away from the unit abuts against the sleeve 12.

[0051] In this technical solution, the sleeve 12 seals the end of the nut 13 near the electric wrench 1. Under the limiting action of the sleeve 12, the screw 18 no longer has relative displacement with the nut 13. Thus, after the screw 18 and the nut 13 are assembled in place, the screw 18 and the nut 13 rotate synchronously. Then, the drive shaft 11 drives the screw 18 to rotate relative to the mounting screw hole, so that the screw 18 is screwed into the mounting screw hole on the unit, ensuring the installation efficiency of the screw 18.

[0052] It is understandable that the screw 18 and nut 13 are assembled in place, which means that the screw 18 is screwed into the deepest part of the nut 13 and abuts against the sleeve 12. The sleeve 12 then restricts the axial displacement of the screw 18 in the nut 13, ensuring that the screw 18 and nut 13 can rotate synchronously.

[0053] As shown in Figure 1, in one feasible embodiment, the inner hole size of the second end of the sleeve 12 is smaller than the size of the threaded hole 19.

[0054] In this technical solution, the inner diameter of the second end of the sleeve 12 is smaller than the diameter of the threaded hole 19. The annular end face of the sleeve 12 covers part of the threaded hole 19, thereby blocking the screw 18 through the sleeve 12. This prevents the screw 18 and nut 13 from moving relative to each other after they are assembled in place, thus ensuring the installation efficiency of the screw 18.

[0055] In one possible implementation, the nut 13 is welded to the sleeve 12.

[0056] In this technical solution, the nut 13 is welded to the sleeve 12 to ensure the firmness and stability of the connection between the nut 13 and the sleeve 12, and to ensure the coaxiality of the nut 13 and the drive shaft 11, thereby ensuring that there is no eccentric load during the torque transmission of the tool, so as to improve the overall rigidity of the tool.

[0057] Furthermore, the inner hole at the first end of the sleeve 12 is square, and the square inner hole is inserted and connected to the square drive shaft 11; the inner hole at the second end of the sleeve 12 is hexagonal, and the maximum diameter of the hexagonal inner hole is smaller than the diameter of the bolt hole, so as to limit the screw 18 through the sleeve 12, and ensure that after the screw 18 and the nut 13 are assembled in place, the screw 18 will no longer have axial displacement relative to the nut 13.

[0058] Furthermore, the nut 13 and the sleeve 12 are welded together using an argon arc welding process.

[0059] In one feasible implementation, the weld height between the nut 13 and the sleeve 12 is no more than 3 mm.

[0060] In this technical solution, the weld height between the nut 13 and the sleeve 12 is less than or equal to 3mm, which reduces the tendency of the nut 13 and the sleeve 12 to deform during the welding process, thereby avoiding an increase in the axial deviation between the nut 13 and the sleeve 12, and thus ensuring the coaxiality of the nut 13 and the sleeve 12.

[0061] Furthermore, before welding the nut 13 and the sleeve 12, the axial deviation of the nut 13 and the sleeve 12 is calibrated to ensure that the axial deviation of the nut 13 and the sleeve 12 is no more than 0.1mm. Then the nut 13 and the sleeve 12 are welded together. Then the sleeve 12 is installed on the drive shaft 11 of the electric wrench 1, which reduces the difficulty of calibrating the axial deviation of the nut 13 and the sleeve 12.

[0062] As shown in Figures 1 and 3, in one feasible embodiment, the screw 18 installation tool further includes: a limiting hole 14, a connecting hole 15, and a positioning component 16; the limiting hole 14 is disposed on the side wall of the drive shaft 11; the connecting hole 15 penetrates the side wall of the sleeve 12, and the connecting hole 15 is coaxially disposed with the limiting hole 14; after the positioning component 16 passes through the connecting hole 15, the positioning component 16 is embedded in the limiting hole 14, and the positioning component 16 is connected to the sleeve 12.

[0063] In this technical solution, the sleeve 12 is connected and positioned to the drive shaft 11 via a positioning component 16 to mount the sleeve 12 onto the drive shaft 11. The positioning component 16 passes through the connecting hole 15 and is embedded in the limiting hole 14 to restrict the relative movement and rotation between the sleeve 12 and the drive shaft 11, ensuring the stability and firmness of the connection between the sleeve 12 and the drive shaft 11. This ensures the synchronicity of the rotation between the sleeve 12 and the drive shaft 11, reduces the impact on the drive shaft 11, and helps extend the tool's service life.

[0064] As shown in Figure 2, in one feasible embodiment, the positioning assembly 16 includes: a limiting rod 161, a fixing part 162, and an elastic element 163; the first end of the limiting rod 161 is embedded in the limiting hole 14, and the second end of the limiting rod 161 is embedded in the connecting hole 15; the fixing part 162 is detachably connected to the sleeve 12; the elastic element 163 is disposed between the fixing part 162 and the limiting rod 161, the first end of the elastic element 163 is connected to the limiting rod 161, the second end of the elastic element 163 is connected to the fixing part 162, and the elastic element 163 applies a pushing force to the limiting rod 161, causing the limiting rod 161 to press against the drive shaft 11.

[0065] In this technical solution, the limiting rod 161 is simultaneously embedded in the limiting hole 14 and the connecting hole 15 to limit the bushing; the fixing part 162 is detachably connected to the sleeve 12, and the fixing part 162 and the limiting rod 161 are connected by an elastic element 163. The elastic element 163 applies pressure to the limiting rod 161, so that the limiting rod 161 is stably embedded in the limiting hole 14 and the connecting hole 15, preventing the limiting rod 161 from coming out of the limiting hole 14, thereby ensuring the reliability of the connection and positioning of the sleeve 12.

[0066] As a preferred embodiment, the elastic element 163 is a spring.

[0067] In one feasible implementation, a second internal thread is provided on the inner wall of the connecting hole 15, and a second external thread is provided on the side wall of the fixing part 162, and the fixing part 162 is threadedly connected to the connecting hole 15.

[0068] In this technical solution, the fixing part 162 is threadedly connected to the sleeve 12. The thread has a self-locking characteristic. On the basis of ensuring the stability of the connection between the fixing part 162 and the sleeve 12, the positioning component 16 is detachably connected to the sleeve 12. This makes it easy to replace nuts 13 of different specifications by disassembling and assembling the sleeve 12, thereby making the tool applicable to screws 18 of different specifications and improving the practicality of the tool.

[0069] As shown in Figures 1 and 2, in one feasible embodiment, the screw 18 installation tool further includes a limiting component 17, the first end of which is rotatably connected to the nut 13, and the second end of which extends away from the electric wrench 1. The limiting component 17 abuts against the mounting surface to limit the screw 18 tightening depth.

[0070] In this technical solution, the limiting component 17 is used to limit the depth of the screw 18 screwed into the unit. The limiting component 17 is rotatably connected to the nut 13. When the screw 18 is installed in place, the limiting component 17 abuts against the mounting surface of the screw 18. Without interfering with the rotation of the nut 13, it limits the depth of the screw 18 screwed into the mounting hole, thereby making the screw depth of all screws 18 on the unit consistent and the length of the screw 18 protruding from the mounting surface consistent. This eliminates the need for uniform adjustment of the protruding length of the screw 18, improves work efficiency, and reduces manual labor intensity.

[0071] As shown in Figures 1, 2, and 4, in one feasible embodiment, the limiting assembly 17 includes: a connecting portion 171, a slewing bearing 172, a connecting ring 173, a support rod 174, and a contact ring 175; the connecting portion 171 is arranged circumferentially along the nut 13 and is fixedly connected to the outer wall of the nut 13; the slewing bearing 172 is fitted on the outside of the nut 13, and the first end of the slewing bearing 172 is connected to the end face of the connecting portion 171 opposite to the electric wrench 1; the connecting ring 173 is fitted on the outside of the nut 13 and is connected to the second end of the slewing bearing 172; the support rod 174 is arranged parallel to the axis of the nut 13, and the first end of the support rod 174 is connected to the connecting ring 173; the contact ring 175 is connected to the second end of the support rod 174.

[0072] In this technical solution, the first end of the slewing bearing 172 is installed onto the nut 13 via the connecting part 171, and the contact ring 175 and the support rod 174 are installed onto the second end of the slewing bearing 172 via the connecting ring 173. The slewing bearing 172 then provides rotational support for the contact ring 175 to ensure that the normal rotation of the nut 13 is not interfered with as the contact ring 175 gradually comes into contact with the mounting surface of the screw 18, thus ensuring that the screw 18 can be installed in place.

[0073] It will be readily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.

[0074] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A screw installation tool, characterized in that, The screw installation tool includes: an electric wrench, the electric wrench including a drive shaft; a socket, the first end of the socket being detachably connected to the drive shaft, the socket being coaxial with the drive shaft; a nut, the nut being fixedly connected to the second end of the socket, the nut being coaxial with the socket; the inner wall of the nut is provided with a first internal thread, the outer wall of the screw is provided with a first external thread, and the first internal thread and the first external thread are adapted to each other.

2. The screw installation tool according to claim 1, characterized in that, The nut includes a threaded hole, and the inner wall of the threaded hole is provided with the first internal thread; the sleeve covers at least part of the threaded hole so that when the nut is screwed into the screw, the end face of the screw away from the unit abuts against the sleeve.

3. The screw installation tool according to claim 2, characterized in that, The inner diameter of the second end of the sleeve is smaller than the diameter of the threaded hole.

4. A screw installation tool according to claim 1, characterized in that, The nut is welded to the sleeve.

5. A screw installation tool according to claim 4, characterized in that, The weld height between the nut and the sleeve is no more than 3mm.

6. A screw installation tool according to claim 1, characterized in that, The screw installation tool further includes: a limiting hole, which is disposed on the side wall of the drive shaft; a connecting hole, which penetrates the side wall of the sleeve and is coaxially disposed with the limiting hole; and a positioning component, which passes through the connecting hole and is embedded in the limiting hole, and is connected to the sleeve.

7. A screw installation tool according to claim 6, characterized in that, The positioning component includes: a limiting rod, the first end of which is embedded in the limiting hole, and the second end of which is embedded in the connecting hole; a fixing part, which is detachably connected to the sleeve; and an elastic element, which is disposed between the fixing part and the limiting rod, the first end of which is connected to the limiting rod, and the second end of which is connected to the fixing part. The elastic element applies a pushing force to the limiting rod, causing the limiting rod to press against the drive shaft.

8. A screw installation tool according to claim 7, characterized in that, The inner wall of the connecting hole is provided with a second internal thread, and the side wall of the fixing part is provided with a second external thread. The fixing part is threadedly connected to the connecting hole.

9. A screw installation tool according to claim 1, characterized in that, The screw installation tool further includes a limiting component, the first end of which is rotatably connected to the nut, and the second end of which extends away from the electric wrench. The limiting component abuts against the mounting surface to limit the screw tightening depth.

10. A screw installation tool according to claim 9, characterized in that, The limiting assembly includes: a connecting portion arranged circumferentially along the nut and fixedly connected to the outer wall of the nut; a slewing bearing fitted on the outside of the nut, with its first end connected to the end face of the connecting portion opposite to the electric wrench; a connecting ring fitted on the outside of the nut and connected to the second end of the slewing bearing; a support rod arranged parallel to the axis of the nut, with its first end connected to the connecting ring; and a contact ring connected to the second end of the support rod.

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