A bolt hole alignment platform for high altitude work

Abstract

The present application aims to overcome the defects of manual alignment, time-consuming and laborious work, and high risk of high-altitude operation in the existing high-altitude butt flange bolt hole of the vertical steel pipe tower, and provides a bolt hole alignment platform for high-altitude operation, which adopts an arc-shaped track sliding platform to carry a mechanical hand module and a screw hole alignment module, automatically completes the up and down pipe section flange bolt hole alignment operation, reduces the labor intensity of high-altitude operation, avoids the safety hazards brought by high-altitude manual operation, and improves the butt joint assembly efficiency of the steel pipe tower.

Description

Technical Field

[0001] This invention belongs to the technical field of high-altitude assembly equipment for power communication towers, and specifically relates to a bolt hole alignment platform for high-altitude operations. Background Technology

[0002] Steel pipe towers are widely used in high-voltage power transmission, communication base station and other engineering projects. Steel pipe towers are usually assembled from multiple cylindrical pipe sections at high altitude on the construction site. The ends of two adjacent cylindrical pipe sections are welded with flanges. During the assembly process, it is necessary to align all the bolt holes on the flanges of the upper and lower pipe sections one by one, and then insert bolts to complete the flange fixing connection, such as the steel pipe tower structure shown in the patents with authorization announcement numbers CN211342028U and CN222276339U.

[0003] Currently, flange bolt hole alignment mainly relies on high-altitude workers. Workers use aerial work platforms or scaffolding to reach the flange location, visually inspect the holes, and then use crowbars to pry the flange to align the bolt holes. However, in this traditional manual operation, when flange bolt holes are misaligned, tools such as crowbars are needed to manually move the steel pipe tower. At heights, space constraints and the use of crowbars are inconvenient, leading to low efficiency. Furthermore, steel pipe tower assembly is a high-risk high-altitude operation, with a high risk of accidents such as falls and tools falling and injuring ground personnel. Finally, the alignment accuracy of manual operation is unstable, especially since manual alignment can only perform unilateral operations and cannot achieve mirror alignment. After aligning one side of the bolt holes, the other side is prone to shifting, and misalignment directly affects the quality of subsequent bolt assembly. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing methods that rely on manual alignment of flange bolt holes for high-altitude docking of vertical steel pipe towers, which is time-consuming, labor-intensive, and dangerous at heights. This invention provides a bolt hole alignment platform for high-altitude operations, which uses an arc-shaped track sliding platform equipped with a robotic arm module and a bolt hole alignment module to automatically complete the alignment of flange bolt holes of upper and lower pipe sections. This reduces the labor intensity of high-altitude operations, avoids the safety hazards caused by manual high-altitude operations, and improves the efficiency of steel pipe tower docking and assembly.

[0005] To solve the above problems, the present invention adopts the following technical solution: A bolt hole alignment platform for high-altitude operations includes a sliding module, a clamping module, a robotic arm module, and a bolt hole alignment module; The sliding module includes a sliding platform that is slidably mounted on an arc-shaped track, and a power component that drives the sliding platform to slide on the arc-shaped track. The robotic arm module is mounted on a sliding platform and slides along the arc-shaped slide rail to adjust its position. The robotic arm module is used to clamp the screw hole alignment module, which is inserted into the screw hole to achieve the alignment of the bolt connection parts of the workpieces to be assembled at both ends. The clamping module is fixedly mounted on the arc-shaped track and is used to clamp the outer side of the upright columnar workpiece to be assembled.

[0006] Furthermore, the inner or outer side of the arc-shaped track is provided with a rack that conforms to the contour of the arc-shaped track; the output end of the power component on the sliding platform is provided with a gear that meshes with the rack; the power component is used to drive the gear to rotate, and cooperates with the rack to control the sliding platform to slide on the arc-shaped track.

[0007] Furthermore, several sliding plates are fixedly installed below the sliding platform; each sliding plate is equipped with two sets of pulleys spaced at a predetermined interval, and the two sets of pulleys roll and adhere to both sides of the arc-shaped track respectively.

[0008] Furthermore, the sliding platform is C-shaped in overall shape, and both the sliding platform and the curved track have cuts on their sides for connection; two robotic arm modules are fixedly installed on the sliding platform, and the two robotic arm modules are symmetrically arranged on both sides of the upper surface of the sliding platform about the center of the platform; the distance between the two robotic arm modules and the cuts of the sliding platform is the same.

[0009] Furthermore, a connecting frame for installing the clamping module is provided below the arc-shaped track; the connecting frame is formed by welding several metal round tubes; and a cavity for accommodating the clamping module is provided inside the connecting frame.

[0010] Furthermore, the connecting frame is C-shaped in general, and two parallel mounting plates are provided on the inner side of the connecting frame, with the two mounting plates distributed vertically. The clamping module includes a clamping arm, a jaw, a clamping cylinder, and a center contact block. The clamping arm is arc-shaped, with a protruding hinge on the outward-facing side of the middle section. One end of the clamping cylinder is hinged to this hinge. The other end of the clamping cylinder is hinged to one end of the jaw. The middle section of the jaw is rotatably connected to a shaft fixed between two mounting plates. The other end of the jaw extends out of the connecting frame and clamps the outer surface of the workpiece to be assembled inside the connecting frame. A protruding center contact block is provided on the inward-facing side of the middle section of the clamping arm, which abuts against the outer surface of the workpiece to be assembled.

[0011] Furthermore, the screw hole alignment module includes a clamping rod, a housing, a motor, a lead screw, a linear slider, and an alignment insert. The clamping rod is used to cooperate with the robotic arm module, which clamps the clamping rod to achieve a fixed connection between the two. The clamping rod is also fixedly connected to the housing. A motor is fixedly installed inside the housing, and a lead screw is rotatably installed thereon. The lead screw is connected to the motor and is driven by the motor to rotate around its axis. The linear slider is installed on the lead screw and is threadedly engaged with it. The alignment insert is fixedly installed on the linear slider and extends out of a through hole at the bottom of the housing to be inserted into a bolt hole on the workpiece to be assembled, thereby aligning the two bolt holes.

[0012] Furthermore, the screw hole alignment module also includes a guide rod and a guide member; the guide rod is fixedly disposed inside the housing and is parallel to the axis of the lead screw; the guide member is slidably disposed on the guide rod and is also fixedly connected to the linear slider.

[0013] Furthermore, the alignment rod is generally in the shape of an inverted triangle, with one end of the alignment rod inserted into the bolt hole being a pointed end; the perforation provided at the bottom of the outer casing is a square hole, and one side or the corresponding two sides of the alignment rod are set as a vertical plane, which fits against the edge of the perforation.

[0014] Furthermore, the screw hole alignment module also includes a hole-expanding plate; one side of the alignment rod is configured to be a vertical plane that fits against the edge of the perforation in the outer shell, and two adjacent sides of the vertical plane in the alignment rod are configured as first inclined surfaces with a set angle; two hole-expanding plates are respectively disposed on the first inclined surfaces on the left and right sides of the alignment rod, and the hole-expanding plates are located between the alignment rod and the inner wall of the perforation at the bottom of the outer shell; an elastic element is also provided between the hole-expanding plate and the outer shell to push the hole-expanding plate toward the alignment rod; the side of the hole-expanding plate that fits against the alignment rod is configured as a second inclined surface corresponding to the angle of the first inclined surface, and the first and second inclined surfaces fit against each other; the side of the hole-expanding plate away from the alignment rod is configured as an arc surface corresponding to the inner wall of the bolt hole; the lower end of the hole-expanding plate is configured as a pointed tip, and the end of the pointed tip is close to the side of the hole-expanding plate that is close to the alignment rod.

[0015] The beneficial effects of this invention are as follows: By setting up a sliding module, the sliding platform can slide circumferentially along the arc track, adapting to the bolt holes distributed circumferentially on the flange of the cylindrical steel pipe tower. It can switch work positions circumferentially without repeatedly moving the entire set of equipment. With the help of the robotic arm module and the bolt hole alignment module, it can achieve the sequential alignment of all bolt holes on the flange. By configuring a gear and rack drive between the arc-shaped track and the sliding platform, the sliding process of the sliding platform is controlled to be smooth and the positioning accuracy of the sliding motion is high, which makes it convenient for the robot arm module to operate and align the bolt holes in the corresponding positions. By setting up a clamping module, the clamps clamp the outer wall of the steel pipe tower after the entire platform is in place, locking the platform relative to the tower in a circumferential manner. During the operation, the platform will not shift relative to the tower, ensuring the stability of the alignment operation. The connecting frame adopts a C-shaped frame welded with round tubes, with a reserved cavity inside to accommodate the clamping module. The overall structure is lightweight and suitable for high-altitude working conditions. The clamping cylinder drives the clamps to form a linkage mechanism, which, together with the central contact block, forms a three-point clamping, ensuring stable and reliable clamping force. By setting contact blocks and spring pins at the ends of the grippers, the gripping stability of the steel pipe tower is ensured, and the contact area and contact friction of the gripping parts are enhanced. By setting up a centrally symmetrical arrangement of dual robotic arm modules, it supports simultaneous operation of two workstations. On the one hand, it improves the efficiency of bolt hole alignment, and on the other hand, the mirror alignment operation on both sides effectively avoids the problem of the other side shifting after one side is operated, ensuring the stability of bolt hole alignment. By configuring a robotic arm module to hold the screw hole alignment module, the internal motor-screw mechanism of the screw hole alignment module drives the alignment rod to extend and retract. The alignment rod is inserted into the corresponding bolt holes of the upper and lower flanges to achieve hole alignment, replacing manual pry bar alignment and avoiding manual work at height. By configuring parallel guide rods and guide components through the screw hole alignment module, the linear slider's motion posture is constrained. This, combined with the alignment rod fitting against the vertical plane of the square perforation in the outer shell, suppresses the twisting of the alignment rod during operation and improves the alignment reliability of the rod. By installing beveled expansion plates and elastic elements on both sides of the alignment rod, when there is a slight assembly deviation in the bolt hole, the expansion plates can adaptively compensate outward and perform slight correction on the bolt hole to ensure accurate alignment of the bolt hole. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the bolt hole alignment platform clamped onto the steel pipe tower in Example 1; Figure 2 This is a schematic diagram of the bolt hole alignment platform from another angle in Embodiment 1; Figure 3 This is a schematic diagram of the bolt hole alignment platform in Example 1; Figure 4 This is a schematic diagram showing the separation of the sliding module and the gripper in Example 1; Figure 5 This is a schematic diagram showing the separation of the arc-shaped track and the sliding platform in Example 1; Figure 6 This is a schematic diagram of the screw hole alignment module in Example 1; Figure 7 This is an exploded view of the screw hole alignment module in Example 1.

[0017] Figure labeling: Sliding module 1, Arc track 11, Sliding platform 12, Power component 13, Rack 14, Gear 15, Slide plate 16, Pulley 17, Clamping module 2, Clamping arm 21, Hinge 211, Gripper 22, Contact block 221, Spring pin 222, Clamping cylinder 23, Center contact block 24, Robotic arm module 3, Screw hole alignment module 4, Clamping rod 41, Spring seat 411, Housing 42, Through hole 421, Motor 43, Lead screw 44, Linear slider 45, Alignment rod 46, First inclined surface 461, Slide groove 462, Guide rod 47, Guide component 48, Expanding hole plate 49, Second inclined surface 491, Arc surface 492, Protrusion 493, Connecting frame 5, Mounting plate 51, Rotating shaft 52. Detailed Implementation

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

[0019] Example 1:

[0020] like Figures 1-7 As shown, a bolt hole alignment platform for high-altitude operations includes a sliding module 1, a clamping module 2, a robotic arm module 3, and a bolt hole alignment module 4. This alignment platform is used for the automated alignment of bolt holes between the mating flanges of two sections of an upright cylindrical steel pipe tower. It should be noted that this example uses the bolt connection of a steel pipe tower; in some other embodiments, it can also be used for bolt hole alignment between other cylindrical workpieces.

[0021] The sliding module 1 includes an arc-shaped track 11, a sliding platform 12, and a power component 13. Both the arc-shaped track 11 and the sliding platform 12 have a C-shaped outline with a break in it, allowing them to be directly engaged laterally with the outside of an upright steel pipe tower workpiece. A rack 14 matching the track outline is provided on the outer or inner side of the arc-shaped track 11; in this example, the rack 14 is located on the outer side of the arc-shaped track 11. The power component 13 is mounted on the sliding platform 12, and a gear 15 is fitted at the output end of the power component 13. The gear 15 and the rack 14 mesh with each other, and the power component 13 drives the gear 15 to rotate, causing the sliding platform 12 to move circumferentially along the arc-shaped track 11. Multiple sliding plates 16 are fixedly installed below the sliding platform 12. Each sliding plate 16 is equipped with two sets of pulleys 17 with a set spacing. In this example, each set of pulleys 17 includes two pulleys 17. The two sets of pulleys 17 are respectively rolled and clamped on both sides of the arc-shaped track 11, so that the sliding platform 12 can slide stably along the arc-shaped track 11. Two robotic arm modules 3 are symmetrically installed on the upper surface of the sliding platform 12. The distance between the two robotic arm modules 3 and the cut of the sliding platform 12 is equal, which supports single-station operation or dual-station synchronous operation. When operating synchronously in dual stations, it can effectively avoid the other side from shifting when aligning one side, and ensure the overall bolt hole alignment accuracy.

[0022] A connecting frame 5 is fixedly installed below the arc-shaped track 11. The connecting frame 5 is formed by welding metal round tubes and has the same overall shape as C. The inside of the connecting frame forms a cavity to accommodate the clamping module 2. Two parallel mounting plates 51 are fixedly installed on the inside of the connecting frame 5 by welding, and a rotating shaft 52 is fixed between the two mounting plates 51.

[0023] The clamping module 2 is assembled in the cavity inside the connecting frame 5. The clamping module 2 includes a clamping arm 21, a gripper 22, and a clamping cylinder 23. The clamping arm 21 is an arc-shaped rod corresponding to the outer side of the steel pipe tower. It should be noted that in this example, a center contact block 24 is also provided in the inner side of the clamping arm 21 near the middle. When the clamping module 2 is clamped and fixed to the outside of the steel pipe tower, the center contact block 24 abuts against the outside of the steel pipe tower, so that a gap is left between the clamping arm 21 and the outer side of the steel pipe tower, so as to avoid the clamping arm 21 rubbing against the steel pipe tower and affecting the clamping effect. The middle part of the clamping arm 21 protrudes outward to form a hinge part 211; one end of the clamping cylinder 23 is hinged to the hinge part 211, and the other end of the clamping cylinder 23 is hinged to one end of the gripper 22; the middle section of the gripper 22 is rotatably mounted on the rotating shaft 52 between the two mounting plates 51, and the working end of the gripper 22 extends outward from the inner side of the connecting frame 5; the clamping cylinder 23 extends and retracts to drive the gripper 22 to swing around the rotating shaft 52, and the gripper 22 swings inward to clamp the outer surface of the internal vertical columnar steel pipe tower workpiece, and with the cooperation of the center contact block 24 on the clamping arm, three-point clamping and locking are achieved, and the entire platform is circumferentially locked and positioned relative to the steel pipe tower.

[0024] To ensure tight contact between the gripper 22 and the cylindrical steel pipe tower, a contact block 221 is provided on the inner side of the gripper 22. The contact block 221 is rotatably connected to the gripper 22. The side of the contact block 221 closest to the steel pipe tower has an arc surface. A spring pin 222 is also provided at the end of the gripper. The end of the spring pin 222 extends out of the gripper 22 and abuts against the side of the contact block 221 facing the gripper 22. The contact block 221 ensures the clamping effect between the gripper 22 and the steel pipe tower.

[0025] The screw hole alignment module 4 includes a clamping rod 41, a housing 42, a motor 43, a lead screw 44, a linear slider 45, an alignment insertion rod 46, a guide rod 47, a guide component 48, a hole enlarging plate 49, and an elastic component. The clamping rod 41 is T-shaped to facilitate clamping by the robotic arm module 3 and prevent deflection displacement after clamping. The clamping rod 41 is fixed to the housing 42 by a spring seat 411, which absorbs the radial deflection force applied to the clamping rod 41 by the robotic arm module 3. The motor 43 is fixedly installed inside the housing 42, and the lead screw 44 is rotatably mounted inside the housing 42. The motor 43 and the lead screw 44 are connected by a meshing gear set, driving the lead screw 44 to rotate. The linear slider 45 is threaded onto the lead screw 44. The interior of the housing 42 is also parallel to... The lead screw 44 fixes the guide rod 47, and the guide member 48 is slidably assembled on the guide rod 47. The guide member 48 and the linear slider 45 are fixed to each other. A square through hole 421 is opened at the bottom of the housing 42. The alignment rod 46 is fixed on the linear slider 45 and passes downward through the through hole 421. The lower end of the alignment rod 46 inserted into the bolt hole has a pointed inverted triangular structure. A vertical plane is provided on the side of the alignment rod 46 that is close to the inner wall of the through hole. The vertical plane fits with the edge of the square through hole 421, which restricts the alignment rod 46 from twisting.

[0026] The vertical plane of the alignment rod 46 has two adjacent sides with a first inclined surface 461 at a set angle. Two expanding plates 49 are arranged on both sides of the alignment rod 46, between the alignment rod 46 and the inner wall of the through hole 421. The expanding plate 49 has a second inclined surface 491 facing the alignment rod 46, which is in opposite directions to the first inclined surface 461. The inner wall of the through hole 421 is also provided with a sliding hole for embedding the expanding plate 49. A spring is provided in the sliding hole as an elastic element, which continuously pushes the expanding plate 49 toward the alignment rod 46. In this example, two sliding holes are provided at different heights in the through hole 421. The two sliding holes cooperate with each other to limit the deflection of the expanding plate 49. The outer side of the expanding plate 49 away from the alignment rod 46 is set as an arc surface 492 that adapts to the inner wall of the bolt hole. The lower end of the expanding plate 49 is a pointed tip, which is close to the side of the expanding plate 49 that is close to the alignment rod 46. When the alignment rod 46 extends downward into the bolt hole, if there is a slight misalignment between the upper and lower flange bolt holes, the hole wall presses against the expanding plate 49. The expanding plate 49 overcomes the thrust of the elastic element and slides along the inclined surface, adaptively compensating for the hole position deviation and achieving fine correction of the bolt hole. In this example, a groove 462 and a protrusion 493 are also provided between the alignment rod 46 and the expanding plate 49. The groove is provided on the first inclined surface 461 of the alignment rod 46, and the protrusion 493 is provided on the second inclined surface 491 of the expanding plate 49. The protrusion 493 is embedded in the groove 462 and slides along the groove 462.

[0027] During implementation, firstly, during high-altitude operations, the entire platform is laterally clamped to the outside of the two connecting flanges of the vertical steel pipe tower using a C-shaped cut. Then, the clamping module 2 is activated, and the clamping cylinder 23 drives the gripper 22 to swing inward, cooperating with the center contact block to apply clamping force in a triangular pattern, clamping the outer wall of the steel pipe tower and locking the entire platform to the tower body to prevent circumferential displacement during operation. Next, the robotic arm module 3 grabs the clamping rod 41 of the screw hole alignment module 4, completing the clamping and fixing of the screw hole alignment module 4. Then, the power component 13 of the sliding module 1 drives the gear 15 to mesh with the rack 14, causing the sliding platform 12 to rotate along the arc-shaped track 11, moving the screw hole alignment module 4 above the set of bolt holes that need to be aligned. Subsequently, the internal motor 43 of the screw hole alignment module 4 drives the lead screw 44 to rotate. The motor rotates, causing the linear slider 45 to move downwards. The alignment rod 46 extends downwards and inserts into the corresponding bolt holes of the upper and lower flanges. It should be noted that at this time, the robotic arm modules 3 on both sides move synchronously in mirror image to perform mirror alignment of the bolt holes on the steel pipe tower. If there is a slight misalignment in the bolt holes, the expanding plate 49 is squeezed and compressed by the hole wall to complete the micro-correction. Relying on the constraint of the alignment rod 46, the bolt holes of the upper and lower flanges are aligned. After the alignment of this set of bolt holes is completed, the motor reverses and drives the alignment rod 46 to retract upwards and disengage from the bolt holes. The sliding module 1 drives the sliding platform 12 to rotate to the next set of bolt hole positions and repeats the alignment operation until all operations are completed. Finally, the clamping cylinder 23 drives the gripper 22 to release the steel pipe tower, and the entire set of equipment is detached from the steel pipe tower from the side, completing the operation.

[0028] The above description is merely a specific example of the present invention and does not constitute any limitation on the present invention. Obviously, those skilled in the art, after understanding the content and principles of the present invention, may make various modifications and changes in form and detail without departing from the principles and structure of the present invention; however, these modifications and changes based on the spirit of the present invention are still within the scope of protection of the claims of the present invention.

Claims

1. A bolt hole alignment platform for high-altitude operations, characterized in that, It includes a sliding module (1), a clamping module (2), a robotic arm module (3), and a screw hole alignment module (4); The sliding module (1) includes a sliding platform (12) that is slidably disposed on the arc track (11), and a power component (13) that drives the sliding platform to slide on the arc track (11). The robotic arm module (3) is mounted on the sliding platform (12) and slides along the arc-shaped slide rail to adjust its position. The robotic arm module (3) is used to clamp the screw hole alignment module (4). The screw hole alignment module (4) is inserted into the screw hole to realize the alignment of the bolt connection parts of the workpieces to be assembled at both ends. The clamping module (2) is fixedly mounted on the arc-shaped track (11). The clamping module (2) is used to clamp the outer side of the upright columnar workpiece to be assembled.

2. The arc-shaped guide rail platform according to claim 1, characterized in that, The inner or outer side of the arc track (11) is provided with a rack (14) that conforms to the contour of the arc track (11); the output end of the power component (13) on the sliding platform is provided with a gear (15) that meshes with the rack (14); the power component (13) is used to drive the gear (15) to rotate, and cooperates with the rack (14) to control the sliding platform (12) to slide on the arc track (11).

3. The arc-shaped guide rail platform according to claim 2, characterized in that, Several sliding plates (16) are fixedly installed below the sliding platform (12); each sliding plate (16) is provided with two sets of pulleys (17) spaced at a predetermined interval, and the two sets of pulleys (17) roll and adhere to both sides of the arc track (11).

4. The arc-shaped guide rail platform according to claim 3, characterized in that, The sliding platform (12) is C-shaped in shape. Both the sliding platform (12) and the arc track (11) have cuts on their sides for connection. Two robotic arm modules (3) are fixedly installed on the sliding platform (12). The two robotic arm modules (3) are symmetrically arranged on both sides of the upper surface of the sliding platform (12) about the center of the circle. The distance between the two robotic arm modules and the cut of the sliding platform (12) is the same.

5. The arc-shaped guide rail platform according to claim 1, characterized in that, Below the arc track (11) is a connecting frame (5) for installing the clamping module (2); the connecting frame (5) is formed by welding several metal round tubes; a cavity for accommodating the clamping module (2) is provided inside the connecting frame (5).

6. The arc-shaped guide rail platform according to claim 5, characterized in that, The connecting frame (5) is C-shaped in general. Two mounting plates (51) are arranged parallel to each other on the inner side of the connecting frame (5). The two mounting plates (51) are distributed vertically. The clamping module (2) includes a clamping arm (21), a jaw (22), a clamping cylinder (23), and a center contact block (24); wherein the clamping arm (21) is arc-shaped, and a hinge (211) protruding outward is provided on the outward side of the middle part of the clamping arm (21), and one end of the clamping cylinder (23) is hinged to the hinge (211); the other end of the clamping cylinder (23) is hinged to one end of the jaw (22), and the middle section of the jaw (22) is also rotatably connected to the rotating shaft (52) fixed between the two mounting plates (51), and the other end of the jaw (22) extends out of the connecting frame (5) to clamp the outer surface of the workpiece to be assembled inside the connecting frame (5); a protruding center contact block (24) is provided on the inward side of the middle part of the clamping arm (21), and the center contact block (24) is used to abut against the outer side of the workpiece to be assembled.

7. The arc-shaped guide rail platform according to claim 1, characterized in that, The screw hole alignment module (4) includes a clamping rod (41), a housing (42), a motor (43), a lead screw (44), a linear slider (45), and an alignment plug (46). The clamping rod (41) is used to cooperate with the robot module (3), and the robot module (3) clamps the clamping rod (41) to achieve a fixed connection between the two. The clamping rod (41) is also fixedly connected to the housing (42). The motor (43) is fixedly installed inside the housing (42), and the lead screw (44) is rotatably installed. The lead screw (44) is connected to the motor (43) for transmission, and the motor (43) drives the lead screw (44) to rotate around the axis. The linear slider (45) is installed on the lead screw (44) and is threadedly connected to the lead screw (44). The alignment plug (46) is fixedly installed on the linear slider (45), and the alignment plug (46) extends out of the through hole (421) provided at the bottom of the housing (42) to be inserted into the bolt hole on the workpiece to be assembled, so as to achieve the alignment of the two bolt holes.

8. The arc-shaped guide rail platform according to claim 7, characterized in that, The screw hole alignment module (4) also includes a guide rod (47) and a guide member (48); the guide rod (47) is fixedly installed inside the housing (42), and the axis of the guide rod (47) is parallel to that of the lead screw (44); the guide member (48) is slidably installed on the guide rod (47), and the slid member is also fixedly connected to the linear slider (45).

9. The arc-shaped guide rail platform according to claim 8, characterized in that, The alignment rod (46) is in the shape of an inverted triangle, and the end of the alignment rod (46) inserted into the bolt hole is a pointed end; the perforation (421) provided at the bottom of the outer shell (42) is a square hole, and one side or the corresponding two sides of the alignment rod (46) is set as a vertical plane, which is in contact with the edge of the perforation (421).

10. The arc-shaped guide rail platform according to claim 9, characterized in that, The screw hole alignment module (4) also includes a hole-expanding plate (49); one side of the alignment rod (46) is configured to fit the vertical plane against the edge of the through hole (421) of the outer shell (42), and the two adjacent sides of the vertical plane of the alignment rod (46) are configured as first inclined surfaces (461) with a set angle; two hole-expanding plates (49) are respectively set on the first inclined surfaces (461) on the left and right sides of the alignment rod (46), and the hole-expanding plates (49) are located between the alignment rod (46) and the inner wall of the through hole (421) at the bottom of the outer shell (42); the hole-expanding plates (49) and the outer shell (42) An elastic element is also provided between 42) to push the expanding plate (49) toward the aligning rod (46); the side of the expanding plate (49) that is in contact with the aligning rod (46) is set as a second inclined surface (491) corresponding to the inclination angle of the first inclined surface (461), and the first inclined surface (461) and the second inclined surface (491) are in opposite contact; the side of the expanding plate (49) that is away from the aligning rod (46) is set as an arc surface (492) corresponding to the inner wall of the bolt hole; the lower end of the expanding plate (49) is set as a tip, and the end of the tip is close to the side of the expanding plate (49) that is close to the aligning rod (46).

Images