A nut installation auxiliary tool for high-speed rail box girder hoist

Abstract

The application discloses a nut mounting auxiliary tool for a high-speed rail box girder lifting appliance, a stud mounting hole is arranged at the top of the high-speed rail box girder, the lifting appliance is arranged above the high-speed rail box girder, the stud on the lifting appliance penetrates into the high-speed rail box girder through the stud mounting hole, the stud is locked on the inner wall of the high-speed rail box girder through a nut, and the nut mounting auxiliary tool comprises a centering assembly, a plurality of clamping assemblies surrounding the centering hole, the plurality of clamping assemblies can simultaneously extend inward by the same distance along the radius of the centering hole, a lifting assembly, a lifting mounting position corresponding to the centering hole in the vertical direction, a nut fixing assembly arranged on the side of the lifting mounting position facing the centering hole, a nut fixing position arranged in the nut fixing assembly, the center of the nut fixing position corresponding to the center of the centering hole in the vertical direction, and a nut screwing assembly connected with the nut fixing assembly and used for controlling the rotation of the nut fixing assembly. The application effectively solves the problem that the nut is easy to slide and cause safety hazards when the nut is manually held.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and in particular to an auxiliary tool for nut installation in a high-speed railway box girder lifting device. Background Technology

[0002] When transporting high-speed railway box girders, lifting studs on the overhead crane need to be inserted into the inner cavity of the box girder, and then locked at the free end of the studs with nuts. Since the nuts are locked on the outside of the lifting studs, workers need to lift and lock them during installation. However, the nuts are heavy, and if they are not lifted steadily during installation, they may slip and fall, injuring workers, thus posing a safety hazard. Summary of the Invention

[0003] The purpose of this invention is to provide an auxiliary tool for nut installation in high-speed railway box girder lifting equipment, which can effectively solve the problem of nuts easily slipping off and causing safety hazards when manually lifting nuts.

[0004] The objective of this invention is achieved as follows:

[0005] A nut installation auxiliary tool for a high-speed railway box girder lifting device includes a stud mounting hole on the top of the box girder. The lifting device is positioned above the box girder, and the studs on the lifting device extend into the box girder through the stud mounting hole. The studs are locked to the inner wall of the box girder by nuts. The tool comprises: a centering assembly with a centering hole in the center and multiple clamping assemblies surrounding the centering hole, the clamping assemblies extending inwards by the same distance along the radius of the centering hole simultaneously; a lifting assembly with a lifting mounting position corresponding vertically to the centering hole; a nut fixing assembly located on the side of the lifting mounting position facing the centering hole, with a nut fixing position whose center corresponds vertically to the center of the centering hole; and a nut tightening assembly connected to the nut fixing assembly at the bottom of the nut fixing assembly for controlling the rotation of the nut fixing assembly.

[0006] Compared with existing technologies, the technical effects achieved by adopting this technical solution are as follows: The nut fixing assembly is used to install the nut, thereby avoiding manual lifting and improving safety; the centering hole in the centering assembly is used to pass through the stud, and through the simultaneous inward movement of multiple clamping assemblies, it can be clamped on the periphery of the stud at the same time, so that the axis of the centering hole and the axis of the stud coincide. At this time, the lifting assembly lifts the nut fixing assembly to the position of the stud, and the nut tightening assembly can accurately tighten the nut and the stud, completing the installation of the nut. Therefore, the manpower required for lifting and tightening is saved in this process, and the installation efficiency is also improved.

[0007] Furthermore, the centering component includes: a centering component base, the centering component base including a plurality of radially arranged first sliding grooves, the first sliding grooves communicating with the centering hole; the clamping component includes a first rod, the first rod sliding within the first sliding groove.

[0008] The technical effects achieved by adopting this technical solution are as follows: The first groove is used to guide the first rod, so that each first rod can move stably along the radial direction of the centering component base to achieve radial clamping. At this time, the centering hole and the stud are more accurately aligned.

[0009] Preferably, the end of the first rod facing the centering hole is an arc surface or a plane.

[0010] Furthermore, the centering component base also includes: a second sliding groove, which is located on the side of the first sliding groove away from the centering hole, and the second sliding groove is arranged in a fan shape; the clamping component also includes a second rod, which has a protrusion perpendicular to the second rod on one end located in the second sliding groove, and the other end of the second rod is rotatably connected to the first rod through a pin.

[0011] The technical effect achieved by adopting this technical solution is that the second rod sweeps along the second slide groove in a fan shape, which can push the first rod to move along the first slide groove toward the centering hole, or retract the first rod.

[0012] Preferably, the end of the first groove away from the centering hole has a blocking surface, which is shaped to match the end of the first rod away from the centering hole.

[0013] In one specific embodiment, the centering component further includes: a linkage member, which is disposed on the base of the centering component. The linkage member has the same number of linkage member circular holes as the second rods, which penetrate the linkage member vertically. The positions of the multiple linkage member circular holes correspond to the positions of the protrusions on the multiple second rods. The protrusions on each second rod are fitted upwards and tightly fitted into the linkage member circular holes of the linkage member. The protrusions at the ends of all second rods away from the first rods are rotatably connected to the linkage member.

[0014] The technical effect achieved by adopting this technical solution is as follows: During the rotation of the linkage, it can drive the ends of all the second rods away from the first rods to rotate synchronously. At this time, the second rods sweep across the second slide groove, and all the first rods move synchronously toward the centering hole to achieve centering.

[0015] Preferably, a linkage through hole is provided at the center of the linkage component, which connects to the centering hole.

[0016] Preferably, at least one handle is provided on the periphery of the linkage.

[0017] Furthermore, the lifting assembly includes: a lifting platform and a lifting drive; one end of the lifting platform is a lifting mounting position that is perpendicularly connected to the side wall of the connecting round rod in the middle of the nut tightening assembly, and the end of the lifting platform away from the lifting mounting position is a lifting transmission component; the lifting drive component is provided with an output shaft arranged in the vertical direction, and the lifting transmission component moves up and down along the output shaft.

[0018] The technical effect achieved by adopting this technical solution is that the output shaft is used to control the lifting and lowering of the lifting transmission component, thereby realizing the lifting and lowering of the nut and saving manpower.

[0019] Furthermore, the lifting assembly also includes: a support tube, the support tube having at least one transmission rail arranged in the vertical direction, an output shaft disposed inside the support tube, the output shaft having a first thread; a lifting transmission component cooperating with the transmission rail, the lifting transmission component sliding along the transmission rail, and the lifting transmission component having a second thread cooperating with the output shaft.

[0020] The technical effects achieved by adopting this technical solution are as follows: the lifting transmission component meshes with the output shaft, allowing the lifting transmission component to slide along the first thread of the output shaft, while the transmission track limits the direction of movement of the lifting transmission component. Therefore, the lifting transmission component can be pushed by the first thread of the output shaft to achieve lifting; multiple transmission tracks can make the lifting platform more stable.

[0021] Preferably, the lifting transmission component has a protrusion, and the first thread of the output shaft is located at the end of the protrusion facing the output shaft; the protrusion cooperates with the transmission rail to achieve lifting.

[0022] Furthermore, the nut fixing assembly includes a nut fixing disc, a claw drive rod, and two nut claws; the claw drive rod and the two nut claws are both mounted on the nut fixing disc, and the two nut claws with identical structures are symmetrically placed on both sides of the center of the nut fixing disc; the claw drive rod passes through one opposite end of each of the two nut claws and is connected by threads, and the claw drive rod is used to drive the two nut claws to move towards each other, forming a nut fixing position between the two nut claws; wherein, both ends of the claw drive rod are mounted on the nut fixing disc through support platforms, and the claw drive rod is rotatably connected to the support platforms, and either end of the claw drive rod can be rotated by hand crank or motor drive.

[0023] The technical effects achieved by adopting this technical solution are as follows: When the chuck drive component has two sections of threads with opposite directions of rotation, the two nut chucks can move in opposite directions, that is, clamping towards each other or moving away from each other, thus achieving the clamping of the nut; in the process of the nut chucks clamping the nut, the correspondence between the center of the nut and the center of the nut fixing position is also realized simultaneously, that is, the correspondence between the center of the nut and the center of the stud is realized, improving the accuracy of installation.

[0024] Furthermore, the nut tightening assembly includes a rotary drive, a rotary guide, and a connecting rod. The nut fixing plate has a guide groove located on its periphery. The rotary guide includes a rotary support and a guide rod arranged vertically. The guide rod is connected to the periphery of the rotary support, the nut fixing plate is placed on top of the rotary support, and the lower end of the guide rod is tightly engaged in the guide groove. The upper end of the guide rod is suspended and located below the first support plate. The rotary drive is connected upward to the rotary guide via the connecting rod to control the rotation of the guide rod around the nut fixing position.

[0025] The technical effects achieved by adopting this technical solution are as follows: the rotary drive component can drive the rotary guide component to rotate, that is, the guide rod can apply a force along the circumference of the nut fixing plate to the guide groove, thereby pushing the nut fixing plate and the nut installed above it to rotate together, so as to lock the nut and the stud; during the nut locking process, the guide rod also realizes the vertical guiding effect on the nut fixing plate, so that the nut can move upward until it is completely locked with the stud.

[0026] Furthermore, the nut installation auxiliary tool also includes: a support frame for supporting the centering component; and a locking wheel located at the bottom of the support frame, which can lock and prevent rotation when the nut installation auxiliary tool is moved to any position inside the high-speed railway box girder.

[0027] The technical effects achieved by adopting this technical solution are as follows: After the support frame supports the centering component, the locking wheel can push or brake the nut installation auxiliary tool, which makes it easy for the nut installation auxiliary tool to move quickly to the position of other studs for nut installation; and the locking wheel can lock the position after the centering component is aligned, preventing the nut installation auxiliary tool from shaking and causing the nut to be out of alignment with the stud.

[0028] Preferably, the support frame includes: a first support plate and a second support plate, and a support column disposed between the first support plate and the second support plate.

[0029] In summary, the present invention has the following beneficial effects:

[0030] (1) The nut fixing assembly can clamp the nut through the jaw drive rod and two nut jaws. The nut tightening assembly controls the nut fixing assembly to rotate and achieve the centering of the nut and the nut fixing position.

[0031] (2) The lifting assembly realizes the lifting of the nut fixing assembly through the meshing of the lifting transmission component and the output shaft, as well as the guiding effect of the transmission rail, avoiding manual lifting, thus improving safety and efficiency;

[0032] (3) The centering hole in the centering assembly is used to pass through the stud. By moving inward simultaneously through multiple clamping components, it can be clamped on the circumference of the stud at the same time, so that the axis of the centering hole and the axis of the stud coincide, thus realizing the accurate installation of the nut and the stud.

[0033] (4) The locking wheel facilitates the use of the nut installation auxiliary tool to install nuts on studs in other positions. The locking wheel can also lock its position after the centering assembly has completed the centering. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of an auxiliary tool for nut installation in a high-speed railway box girder lifting device, provided by an embodiment of the present invention.

[0035] Figure 2 for Figure 1 A schematic diagram of the nut installation auxiliary tool and the installation of the high-speed railway box girder;

[0036] Figure 3 for Figure 1 A schematic diagram of the structure of the center-to-center component;

[0037] Figure 4 for Figure 3 Exploded view of the center-to-center components;

[0038] Figure 5 for Figure 4 A schematic diagram of the structure of the center-to-center component base;

[0039] Figure 6 for Figure 1 Schematic diagram of the lifting assembly, nut fixing assembly, and nut tightening assembly;

[0040] Figure 7 for Figure 1 Schematic diagram of the middle nut fixing assembly;

[0041] Figure 8 for Figure 1 Schematic diagram of the middle nut tightening assembly;

[0042] Figure 9 for Figure 6 Schematic diagram of the middle lifting platform;

[0043] Explanation of key component symbols:

[0044] 100 is a nut installation auxiliary tool; 110 is a centering assembly; 111 is a centering hole; 112 is a centering assembly base; 112a is a first slide groove; 112b is a second slide groove; 112c is a blocking surface; 113 is a first rod; 114 is a second rod; 114a is a protrusion; 114b is a pin; 115 is a linkage component; 115a is a circular hole for the linkage component; 115b is a through hole for the linkage component; 115c is a handle; 116 is a clamping assembly; 120 is a lifting assembly; 121 is a lifting platform; 121a is a lifting mounting position; 121b is a lifting transmission component; 121c is a protrusion; 122 is a lifting drive component. ; 122a is the output shaft; 123 is the support tube; 130 is the nut fixing assembly; 131 is the nut fixing position; 132 is the nut fixing disc; 132a is the guide groove; 133 is the claw drive rod; 134 is the nut claw; 135 is the support platform; 140 is the nut tightening assembly; 141 is the rotation drive component; 142 is the rotation guide component; 142a is the guide rod; 142b is the rotation support component; 143 is the connecting round rod; 150 is the support frame; 151 is the first support plate; 152 is the second support plate; 153 is the support column; 160 is the locking wheel; 200 is the high-speed railway box girder; 201 is the stud mounting hole. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the embodiments and the accompanying drawings.

[0046] A nut installation auxiliary tool for a high-speed railway box girder lifting device includes a stud mounting hole 201 on the top of the high-speed railway box girder 200, with the lifting device positioned above the high-speed railway box girder 200. A stud mounted on the lifting device extends into the high-speed railway box girder 200 through the stud mounting hole 201, and the stud is locked to the inner wall of the high-speed railway box girder 200 by a nut. The nut installation auxiliary tool 100 includes a centering assembly 110, with a centering hole 111 in the middle of the centering assembly 110 and a plurality of clamping assemblies 116 surrounding the centering hole 111. The plurality of clamping assemblies 116 can extend inward by the same distance along the radius of the centering hole 111 simultaneously. The lifting assembly 120 has a lifting mounting position 121a, which corresponds to the centering hole 111 in the vertical direction; the nut fixing assembly 130 is located on the side of the lifting mounting position facing the centering hole 111, and has a nut fixing position 131, the center of which corresponds to the center of the centering hole 111 in the vertical direction; the nut tightening assembly 140 is located at the bottom of the nut fixing assembly 130 and is connected to the nut fixing assembly 130 to control the rotation of the nut fixing assembly 130.

[0047] In this embodiment, the nut fixing assembly 130 is used to install the nut, thereby avoiding manual lifting and improving safety. The centering hole 111 in the centering assembly 110 is used to pass through the stud. By having multiple clamping assemblies move inward simultaneously, they can eventually clamp around the stud, making the axis of the centering hole 111 coincide with the axis of the stud. At this time, the lifting assembly 120 lifts the nut fixing assembly 130 to the position of the stud, and the nut tightening assembly 140 can accurately tighten the nut and the stud, completing the installation of the nut. Therefore, this process saves the manpower required for lifting and tightening, and also improves the installation efficiency.

[0048] In one specific embodiment, the centering assembly 110 includes: a centering assembly base 112, the centering assembly base 112 including a plurality of radially arranged first sliding grooves 112a, the first sliding grooves 112a communicating with the centering hole 111; and a clamping assembly 116 including a first rod 113, the first rod 113 sliding within the first sliding grooves 112a. The first sliding grooves 112a serve to guide the first rods 113, enabling each first rod 113 to move stably along the radial direction of the centering assembly base 112, thereby achieving radial clamping of the stud. This results in a more accurate centering state between the centering hole 111 and the stud.

[0049] Preferably, the end of the first rod 113 facing the centering hole 111 is an arc surface or a plane, which is not limited here.

[0050] In one specific embodiment, the centering component base 112 further includes: a second slide groove 112b, which is located on the side of the first slide groove 112a away from the centering hole 111, and the second slide groove 112b is arranged in a fan shape; the clamping component 116 further includes a second rod 114, on one end of the second rod 114 located in the second slide groove 112b, a protrusion 114a perpendicular to the second rod 114 is provided, and the other end of the second rod 114 is rotatably connected to the first rod 113 through a pin 114b; wherein, the second rod 114 sweeps along the second slide groove 112b in a fan shape, which can push the first rod 113 to move along the first slide groove 112a toward the centering hole 111, or retract the first rod 113.

[0051] Preferably, the end of the first groove 112a away from the centering hole 111 has a blocking surface 112c. The blocking surface 112c is shaped to match the end of the first rod 113 away from the centering hole 111, thereby preventing the first rod 113 from retracting too much and causing the angle between the first rod 113 and the second rod 114 to be less than 90 degrees, making it difficult to slide inward again.

[0052] Preferably, the depth of the first groove 112a is greater than the depth of the second groove 112b, and the second rod 114 is located on the side of the first rod 113 away from the centering component base 112, so that the movement of the first rod 113 and the second rod 114 will not interfere with each other.

[0053] Preferably, the second slide groove 112b is located on one side of the first slide groove 112a. That is, after the second rod 114 rotates to a state where it is collinear with the first rod 113 via the pin 114b, it will not continue to slide due to the obstruction of the side wall of the first slide groove 112a, thus making the clamping state more stable.

[0054] In one specific embodiment, the centering component 110 further includes a linkage component 115, which is mounted on the centering component base 112. The linkage component 115 has the same number of linkage holes 115a as the second rods 114, which penetrate the linkage component 115 vertically. The positions of the multiple linkage holes 115a correspond to the positions of the protrusions 114a on the multiple second rods 114. The protrusions 114a on each second rod 114 are fitted upwards and tightly fitted into the linkage holes 115a of the linkage component 115. The protrusions 114a of all the second rods 114 at the ends away from the first rods 113 are rotatably connected to the linkage component 115. During the rotation of the linkage component 115, the protrusions 114a can drive the ends of all the second rods 114 away from the first rods 113 to rotate synchronously. At this time, the second rods 114 sweep across the second sliding groove 112b, and all the first rods 113 move synchronously toward the centering hole 111 to achieve centering.

[0055] Preferably, a linkage through hole 115b is provided in the center of the linkage 115, which connects to the centering hole 111, so that a stud or nut can pass through.

[0056] Preferably, at least one handle 115c is provided on the periphery of the linkage 115 to facilitate manual rotation of the linkage 115 to control the clamping assembly 116 to clamp the stud for centering.

[0057] In one specific embodiment, the lifting assembly 120 includes a lifting platform 121 and a lifting drive 122; one end of the lifting platform 121 is a lifting mounting position 121a that is vertically connected to the side wall of the connecting rod 143 in the middle of the nut tightening assembly 140, and the other end of the lifting platform 121 away from the lifting mounting position is a lifting transmission component 121b; an output shaft 122a is provided on the lifting drive 122 in a vertical direction, and the lifting transmission component 121b moves up and down along the output shaft 122a; wherein, the output shaft 122a is used to control the lifting transmission component 121b to move up and down, thereby realizing the lifting and transporting of the lifting platform 121 and the nut, saving manpower.

[0058] Preferably, the lifting assembly 120 further includes: a support tube 123, the support tube 123 having at least one transmission track 123a arranged vertically, an output shaft 122a disposed within the support tube 123, and the output shaft 122a having a first thread; a lifting transmission member 121b cooperating with the transmission track 123a, the lifting transmission member 121b sliding along the transmission track 123a, and the lifting transmission member 121b having a second thread cooperating with the output shaft 122a. The engagement of the lifting transmission member 121b with the output shaft 122a allows the lifting transmission member 121b to slide along the first thread of the output shaft 122a, while the transmission track 123a defines the direction of movement of the lifting transmission member 121b. Therefore, the lifting transmission member 121b can be driven by the first thread of the output shaft 122a to achieve lifting.

[0059] Preferably, the lifting transmission component 121b has a ring structure, and the inner ring of the lifting transmission component 121b cooperates with the outer wall of the support tube 123 to prevent movement during the lifting process.

[0060] Preferably, the lifting transmission component 121b has a protrusion 121c, and the first thread of the output shaft 122a is located at the end of the protrusion 121c facing the output shaft 122a; the protrusion 121c cooperates with the transmission rail 123a to achieve lifting. When the support tube 123 has multiple rails, multiple protrusions 121c can be provided accordingly, thereby improving the stability of the lifting platform 121.

[0061] In one specific embodiment, the nut fixing assembly 130 includes a nut fixing plate 132, a claw drive rod 133, and two nut claws 134. The claw drive rod 133 and the two nut claws 134 are both disposed on the nut fixing plate 132, and the two nut claws 134 with identical structures are symmetrically placed on both sides of the center of the nut fixing plate 132. The claw drive rod 133 passes through one opposite end of each of the two nut claws 134 and is connected by threads. The claw drive rod 133 is used to drive the two nut claws 134 to move towards each other, and a nut fixing position 131 is formed between the two nut claws 134. The two ends of the claw drive rod 133 are mounted on the nut fixing plate 132 through a support platform 135. The claw drive rod 133 is rotatably connected to the support platform 135, and either end of the claw drive rod 133 can be rotated by hand or motor drive.

[0062] Preferably, when the two ends of the clevis drive 133 have two sections of threads with opposite directions of rotation, that is, when the two nut clevises 134 are installed on the thread sections with different directions of rotation, they can achieve opposite directions of movement, clamping towards each other or moving away from each other, thus achieving the clamping of the nut and facilitating the assembly of the nut and the stud; wherein, during the process of the nut clevises 134 clamping the nut, the center of the nut is also simultaneously aligned with the center of the nut fixing position 131, that is, the center of the nut and the center of the stud are aligned, improving the accuracy of installation.

[0063] In one specific embodiment, the nut tightening assembly 140 includes a rotation drive 141, a rotation guide 142, and a connecting rod 143. The nut fixing plate 132 is provided with a guide groove 132a, which is located on the periphery of the nut fixing plate 132. The rotation guide 142 includes a rotation support 142b and a guide rod 142a arranged in a vertical direction. The guide rod 142a is connected to the periphery of the rotation support 142b. The nut fixing plate 132 is placed on top of the rotation support 142b, and the lower end of the guide rod 142a is tightly engaged in the guide groove 132a. The upper end of the guide rod 142a is suspended and located on the first support. Below plate 151; rotary drive 141 is connected upward to rotary guide 142 via connecting rod 143, used to control guide rod 142a to rotate around nut fixing position 131; wherein, rotary drive 141 can drive rotary guide 142 to rotate, that is, guide rod 142a can apply force along the circumference of nut fixing plate 132 to guide groove 132a, thereby pushing nut fixing plate 132 and the nut installed above it to rotate together, realizing the locking of nut and stud; during the nut locking process, guide rod 142a also realizes the vertical guiding effect of nut fixing plate 132, so that nut can move upward until fully locked with stud.

[0064] In one specific embodiment, the nut installation auxiliary tool 100 further includes: a support frame 150 for supporting the alignment component 110; and a locking wheel 160, which is located at the bottom of the support frame 150. When the nut installation auxiliary tool 100 moves to any position within the high-speed railway box girder 200, the locking wheel 160 can lock and prevent rotation. Specifically, after the support frame 150 supports the alignment component 110, the locking wheel 160 can push or brake the nut installation auxiliary tool 100, facilitating its rapid movement to other stud positions for nut installation. The locking wheel 160 locks its position after the alignment component 110 completes alignment, preventing the nut installation auxiliary tool 100 from shaking and causing the nut to misalign with the stud.

[0065] Preferably, the support frame 150 includes: a first support plate 151 and a second support plate 152, and a support column 153 disposed between the first support plate 151 and the second support plate 152. The centering assembly 110 is disposed at the upper center of the first support plate 151, and the lifting drive component 122 and the locking wheel 160 are disposed below the second support plate 152.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nut installation auxiliary tool for a high-speed railway box girder lifting device, wherein a stud mounting hole is provided on the top of the high-speed railway box girder, the lifting device is positioned above the high-speed railway box girder, a stud installed on the lifting device extends into the high-speed railway box girder through the stud mounting hole, and the stud is locked to the inner wall of the high-speed railway box girder by a nut, characterized in that: The nut installation auxiliary tool includes: a centering assembly with a centering hole in the middle and multiple clamping assemblies surrounding the centering hole, the multiple clamping assemblies being able to extend inward by the same distance along the radius of the centering hole simultaneously; a lifting assembly with a lifting mounting position that corresponds vertically to the centering hole; a nut fixing assembly located on the side of the lifting mounting position facing the centering hole, the nut fixing assembly having a nut fixing position whose center corresponds vertically to the center of the centering hole; and a nut tightening assembly located at the bottom of the nut fixing assembly and connected to the nut fixing assembly for controlling the rotation of the nut fixing assembly.

2. The nut installation auxiliary tool for high-speed railway box girder lifting device according to claim 1, characterized in that: The centering assembly includes: a centering assembly base, the centering assembly base including a plurality of radially arranged first sliding grooves, the first sliding grooves communicating with the centering hole; the clamping assembly includes a first rod, the first rod sliding within the first sliding groove.

3. The nut installation auxiliary tool for high-speed railway box girder lifting device according to claim 2, characterized in that: The centering component base also includes: a second slide groove, which is located on the side of the first slide groove away from the centering hole, and the second slide groove is fan-shaped; the clamping component also includes a second rod, which has a protrusion perpendicular to the second rod at one end located in the second slide groove, and the other end of the second rod is rotatably connected to the first rod via a pin.

4. The nut installation auxiliary tool for high-speed railway box girder lifting device according to claim 3, characterized in that: The centering component also includes: a linkage component, which is mounted on the centering component base. The linkage component has the same number of linkage component holes as the second rods, which pass through the linkage component vertically. The positions of the multiple linkage component holes correspond to the positions of the protrusions on the multiple second rods. The protrusions on each second rod are tightly fitted upwards into the linkage component holes of the linkage component. The protrusions at the ends of all second rods away from the first rods are rotatably connected to the linkage component.

5. The nut installation auxiliary tool for high-speed railway box girder lifting device according to claim 4, characterized in that: A linkage through hole is provided in the center of the linkage component, which connects to the centering hole, and at least one handle is provided on the periphery of the linkage component.

6. The nut installation auxiliary tool for high-speed railway box girder lifting equipment according to any one of claims 1-5, characterized in that: The lifting assembly includes a lifting platform and a lifting drive component; one end of the lifting platform is a lifting mounting position that is perpendicularly connected to the side wall of the connecting round rod in the middle of the nut tightening assembly, and the other end of the lifting platform away from the lifting mounting position is a lifting transmission component; the lifting drive component is provided with an output shaft arranged in the vertical direction, and the lifting transmission component moves up and down along the output shaft.

7. The nut installation auxiliary tool for high-speed railway box girder lifting device according to claim 6, characterized in that: The lifting assembly also includes: a support tube, which has at least one transmission rail arranged in a vertical direction, an output shaft located inside the support tube, and the output shaft having a first thread; a lifting transmission component that cooperates with the transmission rail, the lifting transmission component sliding along the transmission rail, and the lifting transmission component having a second thread that cooperates with the output shaft.

8. The nut installation auxiliary tool for high-speed railway box girder lifting device according to claim 6, characterized in that: The nut fixing assembly includes a nut fixing disc, a claw drive rod, and two nut claws. The claw drive rod and the two nut claws are all mounted on the nut fixing disc, with two identical nut claws symmetrically placed on either side of the center of the nut fixing disc. The claw drive rod passes through one opposite end of each of the two nut claws and is threaded together. The claw drive rod drives the two nut claws to move towards each other, forming a nut fixing position between the two nut claws. Both ends of the claw drive rod are mounted on the nut fixing disc via support platforms, and the claw drive rod is rotatably connected to the support platforms. Either end of the claw drive rod can be rotated by hand cranking or a motor drive.

9. The nut installation auxiliary tool for high-speed railway box girder lifting device according to claim 8, characterized in that: The nut tightening assembly includes a rotary drive, a rotary guide, and a connecting rod. The nut fixing plate has a guide groove located on its periphery. The rotary guide includes a rotary support and a guide rod arranged vertically. The guide rod is connected to the periphery of the rotary support. The nut fixing plate is placed on top of the rotary support, and the lower end of the guide rod is tightly engaged in the guide groove. The upper end of the guide rod is suspended and located below the first support plate. The rotary drive is connected upward to the rotary guide via the connecting rod to control the rotation of the guide rod around the nut fixing position.

10. The nut installation auxiliary tool for high-speed railway box girder lifting equipment according to any one of claims 1-5, characterized in that: The nut installation auxiliary tool also includes: a support frame for supporting the centering component; and a locking wheel located at the bottom of the support frame. When the nut installation auxiliary tool is moved to any position inside the high-speed railway box girder, the locking wheel can lock and prevent rotation.

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