A rail flaw detection landing gear

Abstract

The present invention provides a rail flaw detection landing gear, which includes a fixed frame and a rotating assembly fixedly matched with the fixed frame. Both ends of the rotating assembly respectively have a rotating output end, and a swing arm is fixedly connected to the rotating output end. The rotating ends of the swing arms are respectively fixedly connected with a flaw detection assembly, and at least one flaw detection wheel is arranged on the flaw detection assembly. The flaw detection wheel can rotate along with the swing arm and press on the surface of the rail. The advantages of the present invention are as follows: The entire landing gear is installed on the flaw detection vehicle through the fixed frame, which can facilitate the overall installation and disassembly of the landing gear. A flaw detection assembly is respectively arranged on both sides of the fixed frame, which can be respectively used to detect the damages of the tracks on both sides. Thus, the flaw detection assemblies on both sides can be synchronously debugged, simplifying the installation and debugging process, improving the work efficiency, being convenient for disassembly and assembly, and facilitating the synchronous adjustment of the positions of the flaw detection assemblies on both sides.

Description

Technical Field

[0001] The present invention relates to the technical field of rail flaw detection, and particularly to a rail flaw detection landing gear. Background Art

[0002] During the welding process of rails, due to problems such as unstable welding equipment, improper selection of process parameters, and quality of rail base metals, defects are generated during the welding process. Among them, there are volume-shaped ones, such as porosity and slag inclusions; and there are planar ones, such as microcracks, grey spots, and lack of fusion. To ensure the safety of train operation, these defects must be detected early.

[0003] Currently, the flaw detection vehicle used for rail flaw detection fixes the detection wheels on both sides of the flaw detection vehicle through mounting brackets. The flaw detection vehicle travels along the rail, causing the detection wheels to scan through the inside of the rail. Before work, it is necessary to fix the detection wheels on both sides separately, then connect the connecting wires, and adjust the angles and positions of the detection wheels on both sides. The whole process is rather cumbersome. Moreover, due to the busy operation of the railway network, the flaw detection vehicle needs to often leave the track for avoidance. At this time, the detection wheels need to be removed from the flaw detection vehicle and reinstalled when starting work again, which affects work efficiency. Also, due to the long operation time, there are certain safety hazards.

[0004] In addition, during the operation of the flaw detection vehicle, the detection wheels on both sides will swing left and right, resulting in missed detections and undetected damages, which brings certain safety hazards to the safe operation of the railway system. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a rail flaw detection landing gear that can adjust the detection wheels on both sides simultaneously to simplify the assembly and debugging process.

[0006] The present invention solves the above technical problem through the following technical solutions: A rail flaw detection landing gear includes a fixed frame and a rotating assembly fixedly matched with the fixed frame. Both ends of the rotating assembly respectively have a rotating output end, and a swing arm is fixedly connected to the rotating output end. The rotating ends of the swing arms are respectively fixedly connected with a flaw detection assembly, and at least one detection wheel is arranged on the flaw detection assembly. The detection wheel can follow the swing arm to rotate and press on the surface of the rail.

[0007] The present invention installs the entire landing gear on the flaw detection vehicle through the fixed frame, which can conveniently realize the overall installation and disassembly of the landing gear. A flaw detection assembly is respectively arranged on both sides of the fixed frame, which can be respectively used to detect the damages of the tracks on both sides. Thus, the flaw detection assemblies on both sides can be synchronously debugged, simplifying the installation and debugging process, improving work efficiency, being convenient for disassembly and assembly, and facilitating the synchronous adjustment of the positions of the flaw detection assemblies on both sides.

[0008] Preferably, the fixing bracket includes a first fixing rod and a second fixing rod below the first fixing rod. A connecting block is respectively arranged below both ends of the first fixing rod. Both ends of the second fixing rod can be clamped into the connecting blocks from below. A limiting block screwed and fixed to the connecting block is clamped and arranged below the second fixing rod. A mounting block is clamped and arranged on the second fixing rod. The mounting block can be fixed to the flaw detection vehicle through two mounting bolts respectively located above and below the second fixing rod.

[0009] Preferably, the rotating assembly includes a double-shaft rotating oil cylinder. Output ends at both ends of the double-shaft rotating oil cylinder are respectively fixedly connected with a rotating shaft. The swing arm rotates following a guiding key.

[0010] Preferably, both ends of the double-shaft rotating oil cylinder are respectively fixed on a first fixing plate. A second fixing plate is respectively arranged at the end parts of the two rotating shafts. A bearing seat is arranged on the second fixing plate. The rotating shaft is fixedly matched with the bearing seat. The first fixing plate and the second fixing plate are respectively fixed on the first fixing rod.

[0011] Preferably, a plurality of clamping plates are arranged on the first fixing rod. The clamping plate includes two clamping blocks. The clamping block has a notch matching with the surface of the first fixing rod. The two clamping blocks are combined to clamp the first fixing rod. The clamping block is screwed and matched with the first fixing plate or the second fixing plate through a bolt.

[0012] Preferably, the output end of the double-shaft rotating oil cylinder is fixedly connected with a connecting sleeve through a spline structure. The rotating shaft is inserted into the connecting sleeve and locked radially through a bolt. A second fixing plate is also arranged at the middle position of the rotating shaft. The rotating shaft is fixedly matched with the bearing seat on the second fixing plate.

[0013] Preferably, two reinforcing plates are also arranged between the two first fixing plates. Both ends of the reinforcing plate are respectively fixedly matched with the first fixing plates on both sides. The double-shaft rotating oil cylinder is located between the two reinforcing plates.

[0014] Preferably, a guiding hub groove is arranged at the fixed end of the swing arm. A rotating plate is arranged at the rotating end of the swing arm. The guiding hub groove is fixedly matched with the rotating shaft.

[0015] Preferably, the flaw detection assembly includes two parallel clamping plates and a plurality of vertical plates fixing the clamping plates between the two clamping plates. The rotating shaft of the flaw detection wheel is fixed on the clamping plates. A connecting plate connecting the two clamping plates is fixed above the clamping plates. The rotating plate is fixedly matched with the connecting plate.

[0016] Preferably, the swing arm is hinged and matched with the rotating plate. A positioning plate is also arranged on the swing arm. An air spring is respectively arranged at both ends of the positioning plate. The two air springs are crossed and then connected to both ends of one of the vertical plates.

[0017] Preferably, a positioning wheel is respectively arranged at both ends of the clamping plate. A limiting protrusion is arranged inside the positioning wheel. Two of the flaw detection wheels are arranged between the two positioning wheels on both sides.

[0018] Preferably, the positioning wheel is screwed on the wheel axle. The wheel axle is fixedly matched with the clamping plates on both sides through positioning bearing seats. One end of the wheel axle at the inner side is coaxially fixed with a worm gear. A transmission rod is fixedly arranged on the inner clamping plate through a worm bearing seat. Worm gears meshing with the worm gears at both ends are respectively fixed on the transmission rod. The flaw detection assembly further includes a driving unit for driving the transmission rod to rotate.

[0019] Preferably, the driving unit includes a motor fixed at the end of the clamping plate. The output end of the motor is connected with a speed reducer. A driving sprocket is arranged at the output end of the speed reducer. A follower sprocket is coaxially fixed at the end of the transmission rod. The driving sprocket and the follower sprocket are connected by a chain for transmission.

[0020] Preferably, a horizontal adjustment assembly is further arranged between the flaw detection assemblies on both sides. The horizontal adjustment assembly includes a telescopic cylinder. The two ends of the telescopic cylinder are respectively connected with a support rod. The ends of the support rods are respectively hinged with a support plate. The support plate is hinged with a connecting plate on the clamping plate. The rotating plate is fixedly connected with the support plate.

[0021] Preferably, a leveling air spring is further hinged on the support rod. The other end of the leveling air spring is hinged on the inner vertical plate.

[0022] The advantages of the rail flaw detection landing gear provided by the present invention are as follows: The whole landing gear is installed on the flaw detection vehicle through a fixing frame, which can conveniently realize the overall installation and disassembly of the landing gear. A flaw detection assembly is respectively arranged on both sides of the fixing frame, which can be respectively used to detect the damage of the tracks on both sides. Thus, the flaw detection assemblies on both sides can be synchronously debugged, simplifying the installation and debugging process, improving the work efficiency, being convenient for disassembly and assembly, and facilitating the synchronous adjustment of the positions of the flaw detection assemblies on both sides. The rotating assembly controls the movement of the swing arms on both sides through a double-axis rotary oil cylinder, ensuring the synchronous adjustment of the positions of the flaw detection assemblies on both sides. The flaw detection wheels are kept on the rail through the positioning wheels, and the position of the positioning wheels can be adjusted axially, facilitating the centering of the flaw detection wheels. The horizontal adjustment assembly enables the flaw detection assemblies on both sides to adapt to the adjustment of the rail spacing width, ensuring that the flaw detection wheels remain centered. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cooperation between the rail flaw detection landing gear provided by the embodiment of the present invention and the rail;

[0024] Figure 2One of the schematic diagrams of the fixing frame of the rail flaw detection landing gear provided by the embodiment of the present invention;

[0025] Figure 3 Another schematic diagram of the fixing frame of the rail flaw detection landing gear provided by the embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the rail flaw detection landing gear provided by the embodiment of the present invention;

[0027] Figure 5 Cross-sectional view of the rotating assembly of the rail flaw detection landing gear provided by the embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the swing arm of the rail flaw detection landing gear provided by the embodiment of the present invention;

[0029] Figure 7 Schematic diagram of the flaw detection assembly of the rail flaw detection landing gear provided by the embodiment of the present invention;

[0030] Figure 8 Schematic diagram of the horizontal adjustment assembly of the rail flaw detection landing gear provided by the embodiment of the present invention. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the following combines specific embodiments and refers to the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0032] As Figure 1 shown, this embodiment provides a rail flaw detection landing gear, including a fixing frame 1 and a rotating assembly 2 fixedly matched with the fixing frame 1. Both ends of the rotating assembly 2 respectively have a rotating output end (not shown in the figure), and a swing arm 3 is fixedly connected to the rotating output end. The rotating ends of the swing arm 3 are respectively fixedly connected to a flaw detection assembly 4. At least one flaw detection wheel 5 is arranged on the flaw detection assembly 4, and the flaw detection wheel 5 can follow the swing arm to rotate and press on the surface of the rail 51.

[0033] In this embodiment, the entire landing gear is installed on the flaw detection vehicle through the fixing frame 1, which can conveniently realize the overall installation and disassembly of the landing gear. A flaw detection assembly 4 is respectively arranged on both sides of the fixing frame, which can be respectively used to detect the damage of the two sides of the track, so that the two flaw detection assemblies 4 can be synchronously debugged, simplifying the installation and debugging process, improving work efficiency, being convenient for disassembly and assembly, and convenient for synchronously adjusting the positions of the two flaw detection assemblies.

[0034] Combined with Figure 2 and Figure 3 The fixing frame 1 includes a first fixing rod 11. The first fixing rod 11 is arranged horizontally. A second fixing rod 13 is also arranged in parallel below the first fixing rod 11. Below the two ends of the first fixing rod 11, a connecting block 14 is respectively arranged. The two ends of the second fixing rod 13 can be clamped into the connecting block 14 from below. A limiting block 15 that is screwed and fixed to the connecting block 14 is clamped and arranged below the second fixing rod 13. The second fixing rod 13 is fixed below the first fixing rod 11 through the fixed connection between the limiting block 15 and the connecting block 14. An installation block 16 is also clamped and arranged on the second fixing rod 13. The installation block 16 is inserted onto the second fixing rod 13 from the side of the second fixing rod 13. The installation block 16 can be fixedly connected to the flaw detection vehicle through two installation bolts respectively located above and below the second fixing rod, thereby fixing the fixing frame 1 on the flaw detection vehicle.

[0035] Refer to Figure 4 The rotating assembly 2 includes a double-shaft rotating oil cylinder 21. At the output ends of both ends of the double-shaft rotating oil cylinder 21, a rotating shaft 22 is respectively fixedly connected. The rotating shaft 22 serves as the rotating output end of the rotating assembly 2, and the swing arm 3 rotates following the rotating shaft 22. Specifically, both ends of the double-shaft rotating oil cylinder 21 are respectively fixed on a first fixing plate 23. At one end of each of the two rotating shafts 22 away from the double-shaft rotating oil cylinder 12, a second fixing plate 24 is arranged. A bearing seat 241 is arranged on the second fixing plate 24. The rotating shaft 22 is fixedly matched with the bearing seat 241 so as to be able to rotate freely.

[0036] The first fixing plate 23 and the second fixing plate 24 are respectively fixed on the first fixing rod 11. Specifically, the first fixing plate 23 and the second fixing plate 24 are respectively clamped or sleeved on the first fixing rod 11, and then are screwed and fixed through a plurality of clamping blocks 12 fixed on the first fixing rod 11. The clamping plate 12 can be fixed on the first fixing rod 11 through installation bolts (not shown in the figure). Specifically, the clamping plate 12 includes two clamping blocks 121. The clamping block 121 has a notch (not shown in the figure) that cooperates with the surface of the first fixing rod 11. The two clamping blocks 121 can be combined to clamp the first fixing rod 11. The two ends of the clamping block 121 are respectively fixed together through installation bolts. The positions of the first fixing plate 23 and the second fixing plate 24 on the first fixing rod 11 are determined by the clamping plate 12.

[0037] Combined with Figure 5The output end of the dual-axis rotary cylinder 21 is fixedly connected to a connecting sleeve 25 through a spline structure. The connecting sleeve 25 has a perforated plate (not shown) inside, and is screwed and fixed to the output end of the dual-axis rotary cylinder 21 through bolts passing through the perforated plate. At the same time, the end of the rotating shaft 22 is inserted into the connecting sleeve 25, and the surface of the rotating shaft 22 is pressed against by bolts arranged radially on the outside of the connecting sleeve 25, so as to realize the coaxial fixation of the rotating shaft 22 and the output end of the dual-axis rotary cylinder 221. Furthermore, a keyway can be arranged on the surface of the rotating shaft 22 to accommodate the bolts tightened radially to improve the locking effect. A second fixing plate 24 is also arranged in the middle position of the rotating shaft 22, and the swing arm 3 is fixed between the two second fixing plates 24 to reduce the shaking of the rotating shaft 22.

[0038] Refer to Figure 4 Two reinforcing plates 26 are further provided between the two first fixing plates 23 , and the two ends of the reinforcing plates 26 are respectively fixedly matched with the first fixing plates 23 on both sides. The dual-axis rotating cylinder 21 is located between the two reinforcing plates 26 , and the reinforcing plates 26 are used to improve the stability of the two first fixing plates 23 .

[0039] refer to Figure 4 and Figure 6 A guide hub groove 31 is provided at the fixed end of the swing arm 3, and a rotating plate 32 is provided at the rotating end of the swing arm 3. The guide hub groove 31 is fixedly matched with the rotating shaft 22, so that the guide hub groove 31 follows the rotating shaft 22 to rotate and adjust the angle. The rotating plate 32 is fixedly matched with the flaw detection component 4, driving the flaw detection component 4 to rotate and press on the rail 51.

[0040] refer to Figure 7 The flaw detection assembly 4 includes two parallel clamps 41 and a plurality of vertical plates 42 between the two clamps 41 for fixing the clamps 41. The axle of the flaw detection wheel 5 is fixed on the clamps 41. A connecting plate 43 fixedly matched with the two clamps 41 is fixed above the clamps 41. The rotating plate 32 is fixedly matched with the connecting plate 43, so that the entire flaw detection assembly 4 rotates with the swing arm 3.

[0041] Further, combined with Figure 4 and Figure 6 The swing arm 3 is hinged with the rotating plate 32, so that the flaw detection component 4 can be gradually pressed onto the rail. At the same time, a positioning plate 33 is fixed on the swing arm 3. An air spring 34 is provided at both ends of the positioning plate 33 in the horizontal direction. The two air springs 34 are crossed and connected to the two ends of one of the vertical plates 42. The clamping plate 41 is pulled by the air spring 34 to prevent the flaw detection component 4 from rotating over a large range relative to the swing arm 3. When it is pressed onto the rail again, the air spring 34 can provide a pressing force to improve the contact effect.

[0042] Reference Figure 7 In this embodiment, two of the flaw detection wheels 5 are arranged between the clamping plates 41. Double scanning is adopted to avoid missed detection and lost detection, thereby reducing safety risks. At both ends of the two clamping plates 41, a positioning wheel 44 is respectively fixed. The inner side of the positioning wheel 44 has a limiting protrusion 441, and the limiting protrusion 441 can contact the edge of the rail for limiting, so as to determine the position of the entire flaw detection assembly 4, making the flaw detection wheels 5 basically located at the center of the rail.

[0043] The two flaw detection wheels 5 are located between the positioning wheels 44 on both sides. The positioning wheels 44 are screwed on the wheel shaft 442, and the wheel shaft 442 and the clamping plates 41 on both sides are fixedly matched through a positioning bearing seat (not shown in the figure), so that the wheel shaft 442 can rotate freely relative to the clamping plates 41. One end of the wheel shaft 442 located on the inner side is coaxially fixed with a turbine 443. A transmission rod 445 is fixed on the inner clamping plate 41 through a worm bearing seat 444. Worms 446 meshing with the turbines 443 at both ends are respectively fixed on the transmission rod 445. The flaw detection assembly 4 further includes a driving unit (not shown in the figure) for driving the transmission rod 445 to rotate. By driving the transmission rod 445 to rotate, the worm and gear structures on both sides rotate synchronously, so as to drive the positioning wheels 44 on both sides to axially adjust their positions relative to the wheel shaft 442, ensuring that the flaw detection wheels 5 are in the centered position.

[0044] The driving unit includes a motor 45 fixed to the end of the clamping plate 41. The output end of the motor 45 is connected with a speed reducer 46. A driving sprocket 461 is arranged at the output end of the speed reducer. A follower sprocket 447 is coaxially fixed at the end of the transmission rod 445. The driving sprocket 461 and the follower sprocket 447 are connected by a chain drive to achieve synchronous rotation, so as to drive the transmission rod 445 to rotate through the motor 45.

[0045] A horizontal adjustment assembly 6 is also arranged between the flaw detection assemblies 4 on both sides. Figure 4 and Figure 8, the horizontal adjustment assembly 6 includes a telescopic cylinder 61. Both ends of the telescopic cylinder 61 are respectively connected with a support rod 62. The end parts of the support rods 62 are respectively hinged with a support plate 63. The support plate 63 is fixedly matched with a connecting plate 43 on the clamping plate 41. The rotating plate 32 is fixedly connected with the support plate 63, so that the horizontal adjustment assembly 6 follows the swing arm 3 to rotate and adjust the position. At the same time, based on the horizontal adjustment assembly 6, the flaw detection assemblies 4 on both sides are driven to change the position synchronously. The telescopic cylinder 61 can use a double-acting cylinder or a single-axis cylinder. One end of the telescopic cylinder 61 is hinged with the support rod 62, allowing the flaw detection assemblies 4 on both sides to adjust the position with a higher degree of freedom. A leveling air spring 64 is also hinged on the support rod 62. The other end of the leveling air spring 64 is hinged on the inner vertical plate 41. With the help of the support plate 63 and the leveling air spring 64, the limit protrusions 441 of the positioning wheels 44 on both sides can abut against the edges of the rail, ensuring that the flaw detection wheels 5 are in the centering position and improving the detection effect of flaw detection.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A rail flaw detection landing gear, characterized in that: It includes a fixed frame and a rotating assembly fixedly matched with the fixed frame. Both ends of the rotating assembly respectively have a rotating output end, and a swing arm is fixedly connected to the rotating output end. A flaw detection assembly is fixedly connected to the rotating ends of the swing arms. At least one flaw detection wheel is arranged on the flaw detection assembly, and the flaw detection wheel can rotate along with the swing arm and press on the surface of the rail. A rotating plate is arranged at the rotating end of the swing arm. The flaw detection assembly includes two parallel clamping plates and a plurality of vertical plates that fix the clamping plates between the two clamping plates. A connecting plate connected to the two clamping plates is fixed above the clamping plates, and the rotating plate is fixedly matched with the connecting plate. The swing arm is hinged with the rotating plate, and a positioning plate is also arranged on the swing arm. An air spring is arranged at each end of the positioning plate, and the two air springs are crossed and connected to both ends of one of the vertical plates. The axle of the flaw detection wheel is fixed on the clamping plate. A positioning wheel is respectively fixed at both ends of the two clamping plates. The positioning wheel is screwed on the axle. The axle and the clamping plates on both sides are fixedly matched through a positioning bearing seat. One end of the axle on the inner side is coaxially fixed with a worm gear. A transmission rod is fixed on the inner clamping plate through a worm gear bearing seat. Worm gears meshing with the worm gears at both ends are respectively fixed on the transmission rod. The flaw detection assembly also includes a driving unit for driving the transmission rod to rotate.

2. The rail flaw detection landing gear according to claim 1, wherein: The fixed frame includes a first fixed rod and a second fixed rod below the first fixed rod. A connecting block is respectively arranged below both ends of the first fixed rod. Both ends of the second fixed rod can be clamped into the connecting block from below. A limiting block screwed and fixed with the connecting block is clamped and arranged below the second fixed rod. An installation block is clamped and arranged on the second fixed rod. The installation block can be fixed on the flaw detection vehicle through two installation bolts respectively located above and below the second fixed rod.

3. The rail flaw detection landing gear according to claim 2, characterized in that: The rotating assembly includes a double-shaft rotating oil cylinder. Output ends at both ends of the double-shaft rotating oil cylinder are respectively fixedly connected with a rotating shaft, and the swing arm rotates along with the rotating shaft.

4. The rail flaw detection landing gear according to claim 3, characterized in that: Both ends of the double-shaft rotating oil cylinder are respectively fixed on a first fixing plate. A second fixing plate is respectively arranged at the end parts of the two rotating shafts. A bearing seat is arranged on the second fixing plate, and the rotating shaft is fixedly matched with the bearing seat. The first fixing plate and the second fixing plate are respectively fixed on the first fixed rod.

5. The rail flaw detection landing gear according to claim 4, characterized in that: A plurality of clamping plates are arranged on the first fixed rod. The clamping plate includes two clamping blocks. The clamping block has a notch matched with the surface of the first fixed rod. The two clamping blocks are combined and clamped the first fixed rod. The clamping block is screwed and matched with the first fixing plate or the second fixing plate through a bolt.

6. The undercarriage for rail flaw detection according to claim 4, characterized in that: The output end of the double-shaft rotating oil cylinder is fixedly connected with a connecting sleeve through a spline structure. The rotating shaft is inserted into the connecting sleeve and locked radially through a bolt. A second fixing plate is also arranged at the middle position of the rotating shaft. The rotating shaft is fixedly matched with the bearing seat on the second fixing plate.

7. The rail flaw detection landing gear according to claim 6, characterized in that: Two reinforcing plates are also arranged between the two first fixing plates. Both ends of the reinforcing plate are respectively fixedly matched with the first fixing plates on both sides. The double-shaft rotating oil cylinder is located between the two reinforcing plates.

8. The rail flaw detection landing gear according to claim 3, characterized in that: A guiding hub groove is arranged at the fixed end of the swing arm, and the guiding hub groove is fixedly matched with the rotating shaft.

9. The rail flaw detection landing gear according to claim 8, characterized in that: The inner side of the positioning wheel has a limit projection, and two flaw detection wheels are arranged between the two positioning wheels on both sides.

10. The rail flaw detection landing gear according to claim 9, wherein: The driving unit includes a motor fixed to the end of the clamping plate. The output end of the motor is connected with a speed reducer. The output end of the speed reducer is provided with a driving sprocket. One end of the transmission rod is coaxially fixed with a follower sprocket. The driving sprocket and the follower sprocket are connected by a chain drive.

11. The rail flaw detection landing gear according to claim 8, characterized in that: A horizontal adjustment component is further arranged between the flaw detection components on both sides. The horizontal adjustment component includes a telescopic cylinder. The two ends of the telescopic cylinder are respectively connected with a support rod. The ends of the support rods are respectively hinged with a support plate. The support plate is hinged and matched with a connecting plate on the clamping plate. The rotating plate is fixedly connected with the support plate.

12. A rail flaw detection landing gear according to claim 11, characterized in that: A leveling air spring is also hinged on the support rod, and the other end of the leveling air spring is hinged on the inner vertical plate.

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