A crane track smoothness laser detection device

Abstract

The present application relates to the technical fields of track smoothness detection, in particular to a crane track smoothness laser detection device, which comprises a mounting box, side plates are fixedly installed on both sides of the mounting box, mounting rods are fixedly installed on the bottom surfaces of the two side plates, universal wheels are fixedly installed at one end of the mounting rods, the mounting box is placed on the track, according to the specifications of the track, the motor B is started to drive the second lead screw to rotate, the second lead screw drives the threaded sleeve to move when rotating, the threaded sleeve drives the two moving plates to move through the cooperation of the first connecting seat, the second connecting seat and the connecting rod when moving, the two moving plates drive the plurality of sliders to move when moving, the plurality of sliders drive the plurality of mounting rods to move when moving, so as to adjust the positions of the plurality of mounting rods, after the plurality of mounting rods move to a certain position, the plurality of universal wheels contact the two sides of the track, the track is clamped, the phenomenon of derailment of the device during detection is avoided, and the stability during detection is enhanced.

Description

Technical Field

[0001] This invention relates to the field of track smoothness detection technology, specifically to a laser detection device for crane track smoothness. Background Technology

[0002] Cranes are essential tools in modern production and construction, widely used in all sectors of the national economy for material handling, loading and unloading, transportation, and installation. The rails, as the load-bearing components of a crane, bear the weight of the crane itself and the loads being lifted. The condition of the rails directly affects the stability and service life of the crane. Due to the difficulty in guaranteeing manufacturing and installation precision, and the influence of factors such as wear and tear and ground subsidence, cranes are prone to "rail biting" during use. "Rail biting" refers to the forced contact between the wheel flanges and the side of the rail during crane trolley operation, generating a horizontal lateral thrust and causing severe friction between the wheel flanges and the rail, resulting in severe wear. Rail biting significantly affects the service life of the crane and also threatens its safe operating condition. In severe cases, rail biting may cause the crane to derail during operation, leading to a major safety accident.

[0003] Existing methods for crane track smoothness testing mostly rely on traditional gauges or inertial methods, which involve a large amount of manual labor, are discontinuous, and have low accuracy and efficiency. While using large track inspection vehicles to test various dynamic parameters of the track provides accurate and reliable data, the cost is quite high, hindering widespread adoption and portability. Therefore, a laser-based crane track smoothness testing device is proposed. Summary of the Invention

[0004] To address the aforementioned problems, a laser detection device for crane track smoothness is provided to solve the issues raised in the background section.

[0005] To address the problems of existing technologies, this invention provides a laser detection device for crane track smoothness, comprising:

[0006] The mounting box has side plates fixedly installed on both sides, and mounting rods fixedly installed on the bottom surface of both side plates. One end of each of the mounting rods is fixedly equipped with a caster wheel.

[0007] An adjustment assembly is disposed within the mounting box and is used to move multiple mounting rods.

[0008] A side box is fixedly installed on one side of the mounting box, and a cleaning brush is provided on the bottom surface of the side box;

[0009] A locking assembly, which is disposed on the side box and is used to limit the cleaning brush;

[0010] A lifting platform is slidably installed inside a mounting box, and the detector body is fixedly installed on the bottom surface of the lifting platform.

[0011] A lifting assembly, which is housed within a mounting box and is used to drive the lifting platform to rise and fall;

[0012] Two traveling wheels are rotatably mounted on both sides inside the mounting box. When testing the smoothness of the track, the mounting box is placed on the track. According to the track specifications, motor B is started to drive the second lead screw to rotate. When the second lead screw rotates, it drives the threaded sleeve to move. When the threaded sleeve moves, it drives the two moving plates to move through the cooperation of the first connecting seat, the second connecting seat, and the connecting rod. When the two moving plates move, they drive multiple sliders to move. When the multiple sliders move, they drive multiple mounting rods to move, thereby adjusting the position of the multiple mounting rods. When the multiple mounting rods move to a certain position, the multiple universal wheels will contact the two sides of the track, clamping the track and preventing the device from derailing during testing, thus enhancing the stability of the testing.

[0013] As one technical solution of the present invention, the adjustment component includes two movable plates, which are slidably mounted on the top surfaces of two side plates respectively. Multiple sliders are slidably mounted inside the two side plates. The top ends of the multiple sliders are fixedly connected to the bottom surfaces of the two movable plates, and the bottom ends of the multiple sliders are fixedly connected to the top ends of multiple mounting rods respectively. When the two movable plates move, they drive the multiple sliders to move, which in turn drives the multiple mounting rods to move, thereby adjusting the position of the multiple mounting rods. When the multiple mounting rods move to a certain position, the multiple casters will contact both sides of the track, clamping the track and preventing the device from derailing during testing, thus enhancing the stability during testing.

[0014] As a technical solution of the present invention, the adjustment component further includes two slots, which are respectively opened on both sides of the mounting box. An inner plate is fixedly installed on the inner side wall of the mounting box. The same second lead screw is rotatably installed between the inner plate and the mounting box. A threaded sleeve is threadedly connected to the second lead screw. A first connecting seat is fixedly installed on both sides of the threaded sleeve. A second connecting seat is fixedly installed on the top surface of the two moving plates. A connecting rod is rotatably installed in each of the two first connecting seats. The bottom ends of the two connecting rods pass through the two slots and are rotatably installed in the two second connecting seats. When the threaded sleeve moves, the two moving plates will move through the cooperation of the first connecting seat, the second connecting seat, and the connecting rod.

[0015] As one technical solution of the present invention, a motor B is fixedly installed on the top surface of the mounting box. The bottom end of the output shaft of the motor B is fixedly connected to the top end of the second lead screw. When the motor B is started, it drives the second lead screw to rotate. When the second lead screw rotates, it will drive the threaded sleeve to move.

[0016] As a technical solution of the present invention, the locking assembly includes two mounting slots, which are formed on the bottom surface of the side box and connected to the inside of the side box. Two mounting sleeves are fixedly installed on the top surface of the cleaning brush, and the two mounting sleeves are respectively movably fitted into the two mounting slots. Two movable blocks are slidably installed inside the side box, and a rod is fixedly installed on the side of each of the two movable blocks that is far apart from each other. The two rods are respectively movably fitted into the two mounting sleeves. After the two movable blocks move to a certain position, the rods will disengage from the mounting sleeves, thereby releasing the restriction on the cleaning brush and allowing the cleaning brush to be removed from the side box.

[0017] As a technical solution of the present invention, the locking assembly further includes two slide rods, which are slidably mounted on the side box. The bottom ends of the two slide rods are respectively fixedly connected to the top surfaces of the two movable blocks. A turntable is rotatably mounted on the top surface of the side box, and two movable rods are rotatably mounted on the turntable. The other ends of the two movable rods are respectively rotatably mounted on the two slide rods. A side frame is fixedly mounted on one side of the mounting box, and a motor C is fixedly mounted on the top surface of the side frame. The bottom end of the output shaft of the motor C is fixedly connected to the top surface of the turntable, which can start the motor C to drive the turntable to rotate. When the turntable rotates, the two slide rods will pull the two slide rods closer together. When the two slide rods are closer together, they will drive the two movable blocks closer together.

[0018] As one technical solution of the present invention, the lifting assembly includes two movable platforms, which are slidably installed on the inner top surface of the mounting box. A second mounting seat is fixedly installed on the bottom surface of each of the two movable platforms. Two first mounting seats are fixedly installed on the top surface of the lifting platform. An adjusting rod is rotatably installed inside each of the two first mounting seats. The top ends of the two adjusting rods are rotatably installed in the two second mounting seats respectively. When the distance between the two movable platforms is adjusted, the lifting platform is raised or lowered through the cooperation of the adjusting rods, the second mounting seats, and the first mounting seats, thereby adjusting the height of the detector body. This facilitates the detector body in detecting the flatness of the track and enhances the accuracy of the detection.

[0019] As a technical solution of the present invention, the lifting assembly further includes a first lead screw, which is rotatably installed in the mounting box. The first lead screw has two threads with opposite directions. The two moving platforms are threadedly connected to the first lead screw. A motor A is fixedly installed on the outer wall of the mounting box. One end of the output shaft of the motor A is fixedly connected to one end of the first lead screw, which can start the motor A to drive the first lead screw to rotate. When the first lead screw rotates, it will adjust the distance between the two moving platforms.

[0020] As one technical solution of the present invention, a traction hook is fixedly installed on one side of the mounting box, and the traction device is connected to the traction hook to drive the entire device to move on the track.

[0021] The advantages of this invention compared to the prior art are:

[0022] 1. When testing the smoothness of the track, place the mounting box on the track. According to the track specifications, start motor B to drive the second lead screw to rotate. When the second lead screw rotates, it will drive the threaded sleeve to move. When the threaded sleeve moves, it will drive the two moving plates to move through the cooperation of the first connecting seat, the second connecting seat, and the connecting rod. When the two moving plates move, they will drive multiple sliders to move. When the multiple sliders move, they will drive multiple mounting rods to move, thereby adjusting the position of multiple mounting rods. When the multiple mounting rods move to a certain position, multiple universal wheels will contact the two sides of the track, clamping the track and preventing the device from derailing during testing, thus enhancing the stability of the test.

[0023] 2. The smoothness of the track is tested by the instrument body. When the instrument body is testing, motor A can be started to drive the first lead screw to rotate. When the first lead screw rotates, it will adjust the distance between the two moving platforms. When the distance between the two moving platforms is adjusted, the lifting platform will be raised and lowered through the cooperation of the adjusting rod, the second mounting base and the first mounting base, thereby adjusting the height of the instrument body. This makes it easier for the instrument body to test the smoothness of the track and enhances the accuracy of the test.

[0024] 3. While inspecting the track, the cleaning brush will sweep the front side of the track to prevent impurities from obstructing the movement of the mounting box on the track. When the cleaning brush wears out, motor C can be started to drive the turntable to rotate. When the turntable rotates, it will pull two sliding rods closer together through two movable rods. When the two sliding rods are close together, they will drive two movable blocks closer together. After the two movable blocks move to a certain position, the insertion rod will disengage from the mounting sleeve. At this time, the limit on the cleaning brush is released, so that the cleaning brush can be removed from the side box to complete the replacement of the cleaning brush. Attached Figure Description

[0025] Figure 1 This is one of the three-dimensional structural diagrams of a laser detection device for crane track smoothness.

[0026] Figure 2 This is the second three-dimensional structural schematic diagram of a laser detection device for crane track smoothness.

[0027] Figure 3 This is the third schematic diagram of a three-dimensional structure of a laser detection device for crane track smoothness.

[0028] Figure 4 A laser detection device for crane track smoothness Figure 3 Enlarged structural diagram of section A in the middle.

[0029] Figure 5 This is the fourth schematic diagram of a three-dimensional structure of a laser detection device for crane track smoothness.

[0030] Figure 6 This is one of the schematic diagrams of the cross-sectional structure of the mounting box for a laser detection device for crane track smoothness.

[0031] Figure 7 This is the second schematic diagram of the cross-sectional structure of the mounting box for a laser detection device for crane track smoothness.

[0032] Figure 8 This is the fifth three-dimensional structural schematic diagram of a laser detection device for crane track smoothness.

[0033] Figure 9 This is the third schematic diagram of the cross-sectional structure of the mounting box for a laser detection device for crane track smoothness.

[0034] The following are the labels in the diagram: 1. Mounting box; 2. Side plate; 3. Mounting rod; 4. Casters; 5. Side box; 6. Cleaning brush; 7. Lifting platform; 8. Tester body; 9. Moving platform; 10. First mounting seat; 11. Second mounting seat; 12. Adjusting rod; 13. First lead screw; 14. Motor A; 15. Second lead screw; 16. Threaded sleeve; 17. Box groove; 18. First connecting seat; 19. Moving plate; 20. Second connecting seat; 21. Connecting rod; 22. Slider; 23. Traction hook; 24. Motor B; 25. Mounting groove; 26. Mounting sleeve; 27. Movable block; 28. Insert rod; 29. ​​Movable rod; 30. Slide rod; 31. Turntable; 32. Traveling wheel; 33. Side frame; 34. Motor C; 35. Inner plate. Detailed Implementation

[0035] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0036] See Figures 1-9As shown, a laser detection device for crane track smoothness includes: a mounting box 1, with side plates 2 fixedly mounted on both sides of the mounting box 1, mounting rods 3 fixedly mounted on the bottom surface of each side plate 2, and casters 4 fixedly mounted on one end of each of the multiple mounting rods 3; an adjustment assembly, disposed within the mounting box 1 and used to move the multiple mounting rods 3; a side box 5, fixedly mounted on one side of the mounting box 1, with a cleaning brush 6 on the bottom surface of the side box 5; a locking assembly, disposed on the side box 5 and used to limit the movement of the cleaning brush 6; a lifting platform 7, slidably mounted within the mounting box 1, with a detector body 8 fixedly mounted on the bottom surface of the lifting platform 7; a lifting assembly, disposed within the mounting box 1 and used to lift the lifting platform 7; and two traveling wheels 32. Wheels 32 are rotatably installed on both sides inside the mounting box 1. When testing the smoothness of the track, the mounting box 1 is placed on the track. According to the specifications of the track, the motor B24 is started to drive the second lead screw 15 to rotate. When the second lead screw 15 rotates, it will drive the threaded sleeve 16 to move. When the threaded sleeve 16 moves, it will drive the two moving plates 19 to move through the cooperation of the first connecting seat 18, the second connecting seat 20, and the connecting rod 21. When the two moving plates 19 move, they will drive multiple sliders 22 to move. When the multiple sliders 22 move, they will drive multiple mounting rods 3 to move, thereby adjusting the position of the multiple mounting rods 3. When the multiple mounting rods 3 move to a certain position, the multiple universal wheels 4 will contact the two sides of the track, clamping the track and preventing the device from derailing during testing, thus enhancing the stability of the test.

[0037] In this embodiment, the adjustment component includes two movable plates 19, which are slidably mounted on the top surfaces of two side plates 2. Multiple sliders 22 are slidably mounted inside the two side plates 2. The top ends of the multiple sliders 22 are fixedly connected to the bottom surfaces of the two movable plates 19, and the bottom ends of the multiple sliders 22 are fixedly connected to the top ends of multiple mounting rods 3. When the two movable plates 19 move, they will drive the multiple sliders 22 to move. When the multiple sliders 22 move, they will drive the multiple mounting rods 3 to move, thereby adjusting the position of the multiple mounting rods 3. When the multiple mounting rods 3 move to a certain position, the multiple casters 4 will contact the two sides of the track, clamping the track and preventing the device from derailing during testing, thus enhancing the stability during testing.

[0038] In this embodiment, the adjustment assembly also includes two slots 17, which are respectively opened on both sides of the mounting box 1. An inner plate 35 is fixedly installed on the inner side wall of the mounting box 1. The same second lead screw 15 is rotatably installed between the inner plate 35 and the mounting box 1. A threaded sleeve 16 is threadedly connected to the second lead screw 15. A first connecting seat 18 is fixedly installed on both sides of the threaded sleeve 16. A second connecting seat 20 is fixedly installed on the top surface of the two moving plates 19. A connecting rod 21 is rotatably installed in each of the two first connecting seats 18. The bottom ends of the two connecting rods 21 pass through the two slots 17 and are rotatably installed in the two second connecting seats 20. When the threaded sleeve 16 moves, the two moving plates 19 will move through the cooperation of the first connecting seat 18, the second connecting seat 20, and the connecting rod 21.

[0039] Motor B24 is fixedly installed on the top surface of mounting box 1. The bottom end of the output shaft of motor B24 is fixedly connected to the top end of the second lead screw 15. When motor B24 is started, it drives the second lead screw 15 to rotate. When the second lead screw 15 rotates, it will drive the threaded sleeve 16 to move.

[0040] In this embodiment, the locking assembly includes two mounting slots 25, which are formed on the bottom surface of the side box 5 and are connected to the interior of the side box 5. Two mounting sleeves 26 are fixedly installed on the top surface of the cleaning brush 6, and the two mounting sleeves 26 are respectively movably fitted into the two mounting slots 25. Two movable blocks 27 are slidably installed inside the side box 5. Insert rods 28 are fixedly installed on the side of the two movable blocks 27 that are far apart from each other. The two insert rods 28 are respectively movably fitted into the two mounting sleeves 26. After the two movable blocks 27 move to a certain position, the insert rods 28 will disengage from the mounting sleeves 26, thereby releasing the restriction on the cleaning brush 6 and allowing the cleaning brush 6 to be removed from the side box 5.

[0041] In this embodiment, the locking assembly also includes two slide rods 30, which are slidably mounted on the side box 5. The bottom ends of the two slide rods 30 are fixedly connected to the top surfaces of the two movable blocks 27, respectively. A turntable 31 is rotatably mounted on the top surface of the side box 5. Two movable rods 29 are rotatably mounted on the turntable 31. The other ends of the two movable rods 29 are rotatably mounted on the two slide rods 30, respectively. A side frame 33 is fixedly mounted on one side of the mounting box 1. A motor C34 is fixedly mounted on the top surface of the side frame 33. The bottom end of the output shaft of the motor C34 is fixedly connected to the top surface of the turntable 31. The motor C34 can be started to drive the turntable 31 to rotate. When the turntable 31 rotates, the two slide rods 30 will be pulled closer through the two movable rods 29. When the two slide rods 30 are close together, they will drive the two movable blocks 27 to be close together.

[0042] In this embodiment, the lifting assembly includes two movable platforms 9, which are slidably mounted on the inner top surface of the mounting box 1. A second mounting base 11 is fixedly mounted on the bottom surface of each of the two movable platforms 9. Two first mounting bases 10 are fixedly mounted on the top surface of the lifting platform 7. An adjusting rod 12 is rotatably mounted inside each of the two first mounting bases 10. The top ends of the two adjusting rods 12 are rotatably mounted inside the two second mounting bases 11. When the distance between the two movable platforms 9 is adjusted, the lifting platform 7 will be raised or lowered through the cooperation of the adjusting rods 12, the second mounting bases 11, and the first mounting bases 10, thereby adjusting the height of the detector body 8. This facilitates the detector body 8 in detecting the flatness of the track, enhancing the accuracy of the detection.

[0043] In this embodiment, the lifting assembly also includes a first lead screw 13, which is rotatably installed in the mounting box 1. The first lead screw 13 has two threads with opposite directions. The two moving platforms 9 are threadedly connected to the first lead screw 13. A motor A14 is fixedly installed on the outer wall of the mounting box 1. One end of the output shaft of the motor A14 is fixedly connected to one end of the first lead screw 13. The motor A14 can be started to drive the first lead screw 13 to rotate. When the first lead screw 13 rotates, it will adjust the distance between the two moving platforms 9.

[0044] In this embodiment, a traction hook 23 is fixedly installed on one side of the mounting box 1. The traction device is connected to the traction hook 23 to drive the entire device to move on the track.

[0045] In use, when testing the smoothness of the track, the mounting box 1 is placed on the track. According to the specifications of the track, the motor B24 is started to drive the second lead screw 15 to rotate. When the second lead screw 15 rotates, it will drive the threaded sleeve 16 to move. When the threaded sleeve 16 moves, it will drive the two moving plates 19 to move through the cooperation of the first connecting seat 18, the second connecting seat 20, and the connecting rod 21. When the two moving plates 19 move, they will drive multiple sliders 22 to move. When the multiple sliders 22 move, they will drive multiple mounting rods 3 to move, thereby adjusting the position of the multiple mounting rods 3. When the multiple mounting rods 3 move to a certain position, the multiple universal wheels 4 will contact the two sides of the track to clamp the track, preventing the device from derailing during testing and enhancing the stability of the test.

[0046] The smoothness of the track is tested by the instrument body 8. When the instrument body 8 is testing, the motor A14 can be started to drive the first lead screw 13 to rotate. When the first lead screw 13 rotates, it will adjust the distance between the two moving platforms 9. When the distance between the two moving platforms 9 is adjusted, the lifting platform 7 will be raised and lowered through the cooperation of the adjusting rod 12, the second mounting base 11, and the first mounting base 10, thereby adjusting the height of the instrument body 8, which makes it easier for the instrument body 8 to test the smoothness of the track and enhances the accuracy of the test.

[0047] While inspecting the track, the cleaning brush 6 will clean the front side of the track to prevent impurities from obstructing the movement of the mounting box 1 on the track. When the cleaning brush 6 wears out, the motor C34 can be started to drive the turntable 31 to rotate. When the turntable 31 rotates, it will pull the two sliding rods 30 closer through the two movable rods 29. When the two sliding rods 30 are close, they will drive the two movable blocks 27 closer. After the two movable blocks 27 move to a certain position, the insertion rod 28 will disengage from the mounting sleeve 26. At this time, the limit on the cleaning brush 6 is released, so that the cleaning brush 6 can be removed from the side box 5 to complete the replacement of the cleaning brush 6.

[0048] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A laser detection device for crane track smoothness, characterized in that, include: Mounting box (1), with side plates (2) fixedly installed on both sides of the mounting box (1), mounting rods (3) fixedly installed on the bottom surface of the two side plates (2), and casters (4) fixedly installed on one end of the multiple mounting rods (3). An adjustment component is disposed within the mounting box (1) and is used to move multiple mounting rods (3); Side box (5), the side box (5) is fixedly installed on one side of the mounting box (1), and the bottom surface of the side box (5) is provided with a cleaning brush (6). A locking assembly is disposed on the side box (5) and is used to limit the cleaning brush (6). Lifting platform (7), the lifting platform (7) is slidably installed in the mounting box (1), and the bottom surface of the lifting platform (7) is fixedly installed with the detector body (8). The lifting assembly is installed inside the mounting box (1) and is used to drive the lifting platform (7) to rise and fall. Two wheels (32) are rotatably mounted on both sides inside the mounting box (1); The adjustment assembly includes two movable plates (19), which are slidably mounted on the top surfaces of two side plates (2). Multiple sliders (22) are slidably mounted inside the two side plates (2). The top ends of the multiple sliders (22) are fixedly connected to the bottom surfaces of the two movable plates (19), and the bottom ends of the multiple sliders (22) are fixedly connected to the top ends of multiple mounting rods (3). The locking assembly includes two mounting slots (25), which are formed on the bottom surface of the side box (5) and are connected to the inside of the side box (5). Two mounting sleeves (26) are fixedly installed on the top surface of the cleaning brush (6), and the two mounting sleeves (26) are respectively movably fitted into the two mounting slots (25). Two movable blocks (27) are slidably installed inside the side box (5), and a rod (28) is fixedly installed on the side of the two movable blocks (27) that are far apart from each other. The two rods (28) are respectively movably fitted into the two mounting sleeves (26). The lifting assembly includes two movable platforms (9), which are slidably installed on the top surface inside the mounting box (1). The bottom surfaces of the two movable platforms (9) are fixedly installed with second mounting seats (11). The top surface of the lifting platform (7) is fixedly installed with two first mounting seats (10). Adjusting rods (12) are rotatably installed in the two first mounting seats (10). The top ends of the two adjusting rods (12) are rotatably installed in the two second mounting seats (11).

2. The laser detection device for crane track smoothness according to claim 1, characterized in that, The adjustment assembly also includes two slots (17), which are respectively opened on both sides of the mounting box (1). An inner plate (35) is fixedly installed on the inner side wall of the mounting box (1). The same second lead screw (15) is rotatably installed between the inner plate (35) and the mounting box (1). A threaded sleeve (16) is threadedly connected to the second lead screw (15). A first connecting seat (18) is fixedly installed on both sides of the threaded sleeve (16). A second connecting seat (20) is fixedly installed on the top surface of the two moving plates (19). A connecting rod (21) is rotatably installed in each of the two first connecting seats (18). The bottom ends of the two connecting rods (21) pass through the two slots (17) and are rotatably installed in the two second connecting seats (20).

3. The laser detection device for crane track smoothness according to claim 2, characterized in that, The top surface of the mounting box (1) is fixedly mounted with a motor B (24), and the bottom end of the output shaft of the motor B (24) is fixedly connected to the top end of the second lead screw (15).

4. The laser detection device for crane track smoothness according to claim 1, characterized in that, The locking assembly also includes two slide rods (30), which are slidably mounted on the side box (5). The bottom ends of the two slide rods (30) are fixedly connected to the top surfaces of the two movable blocks (27), respectively. A turntable (31) is rotatably mounted on the top surface of the side box (5). Two movable rods (29) are rotatably mounted on the turntable (31). The other ends of the two movable rods (29) are rotatably mounted on the two slide rods (30), respectively. A side frame (33) is fixedly mounted on one side of the mounting box (1). A motor C (34) is fixedly mounted on the top surface of the side frame (33). The bottom end of the output shaft of the motor C (34) is fixedly connected to the top surface of the turntable (31).

5. The laser detection device for crane track smoothness according to claim 1, characterized in that, The lifting assembly also includes a first lead screw (13), which is rotatably installed in the mounting box (1). The first lead screw (13) has two threads with opposite directions. The two moving platforms (9) are threadedly connected to the first lead screw (13). A motor A (14) is fixedly installed on the outer wall of the mounting box (1). One end of the output shaft of the motor A (14) is fixedly connected to one end of the first lead screw (13).

6. The laser detection device for crane track smoothness according to claim 1, characterized in that, A traction hook (23) is fixedly installed on one side of the mounting box (1).

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