A wheel set flaw detection test bench for rail transit locomotives and rolling stock

Abstract

The present invention relates to the technical field of wheel set flaw detection, and specifically to a wheel set flaw detection test bench for rail transit locomotives and vehicles, including a buried frame, the buried frame is fixedly connected with a framework, and further includes: a wheel set limit and lifting structure connected to the buried frame; a track simulation driving structure connected to the buried frame; a bearing limit and supporting structure connected to the buried frame, the bearing limit and supporting structure includes a variable pitch lifting part, and the variable pitch lifting part is connected with two groups of bearing clamping and limiting parts; an ultrasonic flaw detection structure connected to the track simulation driving structure. The present invention limits the bearings on the wheel set, drives the wheel set to rotate and performs ultrasonic flaw detection on the rotating wheel set. When an independent power component is installed on the wheel set, the present invention provides limit for the wheel set and measures the angle passed by the rotation of the wheel set, so that the present invention is applicable to flaw detection operations on different wheel sets and improves the applicability of the present invention.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel set flaw detection, and specifically to a wheel set flaw detection test bench for rail transit locomotives and vehicles. Background Art

[0002] With the expansion of the urban rail transit industry over the years, the subway, as an important part of the urban transportation network, has become an indispensable part of urban residents' travel. The wheel set drive of urban rail transit, as a key component of subway vehicles, its service reliability is directly related to the safety and comfort of subway vehicles. After the wheel sets of urban rail vehicles have been running for a certain period of time, they need to be overhauled. In order to ensure the good technical condition of the wheel sets and provide data support, it is necessary to perform flaw detection on the wheel sets to determine whether there are defects such as fatigue cracks. The flaw detection area of the wheel sets includes the axle and the wheel.

[0003] When the wheel set flaw detection test bench is in use, the bearings on the wheel set need to be placed on the support platform. However, the bearing positions of different types of wheel sets are different, and the bearing sizes are also different. Some wheel sets are equipped with independent power components, so some wheel sets do not require the equipment to drive the wheel set to rotate. While some wheel sets are not equipped with independent power components, the test bench needs to be provided with a drive component to drive the wheel set to rotate. However, existing equipment often can only meet one situation, and its applicability is limited. Summary of the Invention

[0004] The purpose of the present invention is to provide a wheel set flaw detection test bench for rail transit locomotives and vehicles to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A wheel set flaw detection test bench for rail transit locomotives and vehicles, including a buried frame, the buried frame is fixedly connected with a frame, the frame is fixedly connected with a console, and further includes:

[0007] A wheel set limit and lifting structure connected to the buried frame, the wheel set limit and lifting structure is used to provide a limit for the wheel set to be detected and provide a driving force for adjusting the position of the wheel set to be detected;

[0008] A rail-simulation drive structure connected to the buried frame, the rail-simulation drive structure enables the wheel set to obtain torque by applying frictional force to the wheel set. When the wheel set rotates actively, the rail-simulation drive structure provides a limit support for the wheel set and performs corner measurement operations;

[0009] A bearing limit support structure connected to an underground frame. The bearing limit support structure includes a variable pitch lifting part connected to the underground frame. The variable pitch lifting part is connected with two groups of symmetrically arranged bearing clamping and limiting parts. The bearing clamping and limiting part includes a linkage seat connected to the variable pitch lifting part. The linkage seat is fixedly connected with a driving motor. The driving motor is fixedly connected with a rotating arm. The rotating arm and the linkage seat are respectively fixedly connected with a group of semi-circular rotating limit components. The two groups of semi-circular rotating limit components are movably connected to each other;

[0010] An ultrasonic flaw detection structure connected to an imitation rail driving structure.

[0011] As a further improvement of the present invention: The wheel set limit lifting structure includes a cushion floor fixedly connected to the underground frame. The cushion floor is fixedly connected with two groups of first active telescopic frames. The underground frame is fixedly connected with two groups of second active telescopic frames. The mobile ends of the two groups of second active telescopic frames are jointly fixedly connected with a track frame. The track frame is fixedly connected with the mobile ends of the two groups of first active telescopic frames. The track frame is fixedly connected with a first motor. The output end of the first motor is fixedly connected with a first lead screw. The first lead screw is threadedly connected with a suspension. The suspension is rotatably connected with a plurality of casters arranged in the groove of the track frame. The suspension is fixedly connected with two groups of third active telescopic frames. The mobile end of the third active telescopic frame is fixed with a double groove plate. Two symmetrically arranged transverse grooves are opened on the double groove plate. Each transverse groove is slidably connected with a convex shaft frame. The convex shaft frame is fixedly connected with a tapered roller. The convex shaft frame is rotatably connected with the suspension. An I-shaped groove is opened on the suspension. A gearbox docking component is movably installed on the I-shaped groove.

[0012] As a further improvement of the present invention: The gearbox docking component includes a hole frame slidably connected to the I-shaped groove. A plurality of connection holes are opened on the hole frame. The hole frame is threadedly connected with a screw rod. The screw rod is fixedly connected with a crank.

[0013] As a further improvement of the present invention: The imitation rail driving structure includes two groups of fixed frames fixedly installed on the underground frame. The two groups of fixed frames are symmetrically arranged on the underground frame. The fixed frame is fixedly connected with a clutch. The clutch is coaxially fixedly connected with a servo motor. The servo motor is fixedly connected with the fixed frame. One end of the clutch away from the servo motor is connected with a reducer. The reducer is fixedly installed on the top surface of the fixed frame. The output end of the reducer is coaxially connected with an optical encoder. The output end of the reducer is coaxially fixedly connected with a conical surface carrier wheel. The fixed frame is fixedly connected with a fourth active telescopic frame. The mobile end of the fourth active telescopic frame is fixedly connected with an assisting support plate. The assisting support plate is movably connected with the conical surface carrier wheel.

[0014] As a further improvement of the present invention: The variable pitch lifting part includes two groups of active telescopic rods fixedly connected to the buried frame. The moving ends of the two groups of active telescopic rods are fixedly connected to a cross frame. A double-output shaft motor is fixedly installed in the middle of the cross frame. The output end of the double-output shaft motor is fixedly connected to a second lead screw. The second lead screw is threadedly connected to a slider that is slidably connected to the cross frame. The slider is fixedly connected to the linkage seat.

[0015] As a further improvement of the present invention: The semi-circular rotation limiting component includes a connecting frame. The connecting frame of the semi-circular rotation limiting component installed on the rotating arm is fixedly connected to the rotating arm. The connecting frame of the semi-circular rotation limiting component installed on the linkage seat is fixedly connected to the linkage seat. The connecting frame is fixedly connected to a rotation limiting frame. The rotation limiting frame is rotatably connected to a semi-circular ring frame. The semi-circular ring frame is fixedly connected to a semi-circular gear ring. The connecting frame is fixedly connected to a second motor. The output end of the second motor is fixedly connected to a gear that meshes with the semi-circular gear ring. The semi-circular gear ring is fixedly connected to three sets of sleeves. Each set of connecting frames is fixedly connected to three rectangular sleeves. The rectangular sleeves are slidably connected to extension bars. The extension bars are fixedly connected to support rods that are slidably connected to the sleeves. The extension bars are fixedly connected to pressure sensors. The pressure sensors are fixedly connected to a sleeve frame. The sleeve frame is connected to a housing through multiple bolts. The housing is fixedly connected to an arc-shaped concave frame.

[0016] As a further improvement of the present invention: The ultrasonic flaw detection structure includes a fifth active telescopic frame fixedly connected to the fixed frame. The moving end of the fifth active telescopic frame is fixedly connected to a sixth active telescopic frame. The moving end of the sixth active telescopic frame is fixedly connected to a first ultrasonic probe. The frame is fixedly connected to a track frame. The track frame is fixedly connected to a third motor. The output end of the third motor is fixedly connected to a reverse threaded rod. The reverse threaded rod is threadedly connected to two symmetrically arranged cross-moving sleeves. The cross-moving sleeves are slidably connected to the track frame. The cross-moving sleeves are fixedly connected to a seventh active telescopic frame. The moving end of the seventh active telescopic frame is fixedly connected to a second ultrasonic probe.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] During use, place the wheel set to be detected on the wheel set limit lifting structure. If there is no independent power component installed on the wheel set, the wheel set limit lifting structure moves the wheel set so that the wheel set moves towards the bearing clamping and limiting part. The driving motor drives the rotating arm to rotate. Under the drive of the rotating arm on the semi-circular rotating limit component, the two groups of semi-circular rotating limit components of the same bearing clamping and limiting part move away from each other. Then, the outer ring of the bearing on the wheel set is caught in the semi-circular rotating limit component on the linkage seat. Then, the driving motor drives the rotating arm to rotate towards the linkage seat, so that the two groups of semi-circular rotating limit components are butted, so that the semi-circular rotating limit component restricts the movement of the outer ring of the bearing, and the wheel set abuts against the ultrasonic flaw detection structure. Then, the variable pitch lifting part drives the bearing clamping and limiting part to move, so that the bearing clamping and limiting part drives the bearing to move, so that the bearing drives the wheel set to move towards the rail-simulating driving structure. The rail-simulating driving structure drives the wheel set to rotate, and the ultrasonic flaw detection structure performs flaw detection on the wheel set. If there is an independent power component installed on the wheel set, connect the wheel set limit lifting structure to the housing of the independent power component. Then, the wheel set limit lifting structure moves the wheel set so that the bearing on the wheel set is butted against the bearing clamping and limiting part, the wheel of the wheel set abuts against the rail-simulating driving structure, and the wheel set abuts against the ultrasonic flaw detection structure. The ultrasonic flaw detection structure performs flaw detection on the wheel set. As the independent power component drives the wheel set, the wheel set rotates. During this period, the rail-simulating driving structure performs a rotational speed measurement operation. Through the mutual cooperation among the wheel set limit lifting structure, the rail-simulating driving structure, and the bearing limit and supporting structure, the present invention limits the bearing on the wheel set, drives the wheel set to rotate, and performs ultrasonic flaw detection on the rotating wheel set. When there is an independent power component installed on the wheel set, the present invention provides limit for the wheel set and measures the angle through which the wheel set rotates, so that the present invention is applicable to flaw detection operations on different wheel sets, improving the applicability of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0020] Figure 2 is a partial three-dimensional structural schematic diagram of the wheel set limit lifting structure of the present invention;

[0021] Figure 3 is a partial three-dimensional structural schematic diagram of the wheel set limit lifting structure of the present invention from another perspective;

[0022] Figure 4 is a three-dimensional structural schematic diagram of the mutual cooperation among the buried frame, the rail-simulating driving structure, and the bearing limit and supporting structure of the present invention;

[0023] Figure 5 is a three-dimensional structural schematic diagram of the mutual cooperation among the fifth active telescopic frame, the sixth active telescopic frame, the first ultrasonic probe, and a part of the rail-simulating driving structure of the present invention;

[0024] Figure 6 Schematic three-dimensional structure diagram of the double-output shaft motor, second lead screw, slider, and bearing clamping and limiting part of the present invention;

[0025] Figure 7 Schematic three-dimensional structure diagram of the bearing clamping and limiting part of the present invention;

[0026] Figure 8 For the present invention Figure 7 Partial enlarged schematic diagram at position A in the present invention;

[0027] Figure 9 Schematic three-dimensional structure diagram of the bearing clamping and limiting part of the present invention from another perspective;

[0028] Figure 10 Schematic internal three-dimensional structure diagram of the sleeve frame, housing, and arc-shaped concave frame of the present invention;

[0029] Figure 11 Schematic three-dimensional structure diagram of the screw rod and the crank of the present invention;

[0030] Figure 12 Schematic three-dimensional structure diagram of the track frame, third motor, reverse threaded rod, transverse sleeve, seventh active telescopic frame, and second ultrasonic probe of the present invention.

[0031] In the figure: 1. Buried frame; 2. Frame; 3. Wheel set limit lifting structure; 4. Rail-simulating drive structure; 5. Bearing limit supporting structure; 6. Variable pitch lifting part; 7. Bearing clamping limit part; 8. Linkage seat; 9. Driving motor; 10. Rotary arm; 11. Semi-circular rotation limit assembly; 12. Ultrasonic flaw detection structure; 13. Floor mat; 14. First active telescopic frame; 15. Second active telescopic frame; 16. Track frame; 17. First motor; 18. First lead screw; 19. Suspension; 20. Third active telescopic frame; 21. Double groove plate; 22. Horizontal groove; 23. Convex shaft frame; 24. Tapered roller; 25. I-shaped groove; 26. Gearbox docking assembly; 27. Hole frame; 29. Screw; 30. Crank; 31. Fixed frame; 32. Clutch; 33. Tapered surface carrier wheel; 34. Reducer; 35. Photoelectric encoder; 36. Servo motor; 37. Fourth active telescopic frame; 38. Boosting support plate; 39. Active telescopic rod; 40. Horizontal frame; 41. Double output shaft motor; 42. Second lead screw; 43. Slide block; 44. Connecting frame; 45. Rotation limit frame; 46. Semi-circular ring frame; 47. Semi-circular gear ring; 48. Second motor; 49. Gear; 50. Sleeve body; 51. Rectangular sleeve; 52. Extension bar; 53. Support rod; 54. Pressure sensor; 55. Sleeve frame; 56. Shell; 57. Arc-shaped concave frame; 58. Fifth active telescopic frame; 59. Sixth active telescopic frame; 60. First ultrasonic probe; 61. Track frame; 62. Third motor; 63. Reverse threaded rod; 64. Horizontal shift sleeve; 65. Seventh active telescopic frame; 66. Second ultrasonic probe. Specific embodiments

[0032] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments.

[0033] Example 1. Refer to Figures 1 to 12 As shown, a wheel set flaw detection test bench for rail transit locomotives and vehicles includes a buried frame 1. The buried frame 1 is fixedly connected to a frame 2, and the frame 2 is fixedly connected to a console. It also includes:

[0034] A wheel set limit lifting structure 3 connected to the buried frame 1. The wheel set limit lifting structure 3 is used to provide limits for the wheel set to be detected and driving force for adjusting the position of the wheel set to be detected;

[0035] A rail-simulating drive structure 4 connected to the buried frame 1. The rail-simulating drive structure 4 obtains torque for the wheel set by applying frictional force to the wheel set. When the wheel set rotates actively, the rail-simulating drive structure 4 provides limit support for the wheel set and performs corner measurement operations;

[0036] The bearing limit supporting structure 5 connected to the buried frame 1, the bearing limit supporting structure 5 includes a variable pitch lifting part 6 connected to the buried frame 1, the variable pitch lifting part 6 is connected with two groups of bearing clamping and limiting parts 7 arranged symmetrically, the bearing clamping and limiting part 7 includes a linkage seat 8 connected to the variable pitch lifting part 6, the linkage seat 8 is fixedly connected with a driving motor 9, the driving motor 9 is fixedly connected with a rotating arm 10, the rotating arm 10 and the linkage seat 8 are respectively fixedly connected with a group of semi-circular rotating limit components 11, and the two groups of semi-circular rotating limit components 11 are movably connected to each other;

[0037] The ultrasonic flaw detection structure 12 connected to the imitation rail driving structure 4, the ultrasonic flaw detection structure 12 is fixedly connected with the frame 2.

[0038] During use, place the wheel set to be detected on the wheel set limit lifting structure 3. If there is no independent power component installed on the wheel set, the wheel set limit lifting structure 3 moves the wheel set so that the wheel set moves towards the bearing clamping and limiting part 7. The driving motor 9 drives the rotating arm 10 to rotate. Under the drive of the rotating arm 10 on the semi-circular rotating limit component 11, the two groups of semi-circular rotating limit components 11 of the same bearing clamping and limiting part 7 move away from each other. Then, the outer ring of the bearing on the wheel set is caught in the semi-circular rotating limit component 11 on the linkage seat 8. Then, the driving motor 9 drives the rotating arm 10 to rotate towards the linkage seat 8, so that the two groups of semi-circular rotating limit components 11 are butted, so that the semi-circular rotating limit component 11 restricts the movement of the outer ring of the bearing, and the wheel set abuts against the ultrasonic flaw detection structure 12. Then, the variable pitch lifting part 6 drives the bearing clamping and limiting part 7 to move, so that the bearing clamping and limiting part 7 drives the bearing to move, so that the bearing drives the wheel set to move towards the imitation rail driving structure 4. The imitation rail driving structure 4 drives the wheel set to rotate, and the ultrasonic flaw detection structure 12 performs flaw detection operations on the wheel set. If there is an independent power component installed on the wheel set, connect the wheel set limit lifting structure 3 to the outer shell of the independent power component. Then, the wheel set limit lifting structure 3 moves the wheel set so that the bearing on the wheel set is butted against the bearing clamping and limiting part 7. The wheel of the wheel set abuts against the imitation rail driving structure 4, and the wheel set abuts against the ultrasonic flaw detection structure 12. The ultrasonic flaw detection structure 12 performs flaw detection operations on the wheel set. As the independent power component drives the wheel set, the wheel set rotates. During this period, the imitation rail driving structure 4 performs rotational speed measurement operations. Through the mutual cooperation among the wheel set limit lifting structure 3, the imitation rail driving structure 4, and the bearing limit supporting structure 5, the present invention limits the bearing on the wheel set, drives the wheel set to rotate, and performs ultrasonic flaw detection operations on the rotating wheel set. When there is an independent power component installed on the wheel set, the present invention provides limit for the wheel set and measures the angle passed by the rotation of the wheel set, so that the present invention is applicable to flaw detection operations on different wheel sets and improves the applicability of the present invention.

[0039] In a case of this embodiment, the wheel set limit lifting structure 3 includes a floor plate 13 fixedly connected to the buried frame 1. The floor plate 13 is fixedly connected with two groups of first active telescopic frames 14. The buried frame 1 is fixedly connected with two groups of second active telescopic frames 15. The moving ends of the two groups of second active telescopic frames 15 are jointly fixedly connected with an orbital frame 16. The orbital frame 16 is fixedly connected with the moving ends of the two groups of first active telescopic frames 14. The orbital frame 16 is fixedly connected with a first motor 17. The output end of the first motor 17 is fixedly connected with a first lead screw 18. The first lead screw 18 is threadedly connected with a suspension 19. The suspension 19 is rotatably connected with a plurality of casters arranged in the groove of the orbital frame 16. The suspension 19 is fixedly connected with two groups of third active telescopic frames 20. The moving end of the third active telescopic frame 20 is fixed with a double-groove plate 21. Two symmetrically arranged transverse grooves 22 are formed on the double-groove plate 21. Each transverse groove 22 is slidably connected with a convex shaft frame 23. The shaft convex end of the convex shaft frame 23 is slidably arranged in the transverse groove 22. The convex shaft frame 23 is fixedly connected with a tapered roller 24. The convex shaft frame 23 is rotatably connected with the suspension 19. An I-shaped groove 25 is formed on the suspension 19. A gearbox docking assembly 26 is movably installed on the I-shaped groove 25. The independent power assembly on the wheel set generally consists of a gearbox installed on the axle of the wheel set and an electric motor power-connected to the gearbox. Generally, the floor plate 13 is installed in the ground, and the top surface of the floor plate 13 is flush with the ground. The floor plate 13 is used to carry the wheel set. The first active telescopic frame 14 and the second active telescopic frame 15 jointly adjust the height of the orbital frame 16 to adjust the height of the casters and the suspension 19. And the third active telescopic frame 20 drives the double-groove plate 21 to move, so that the transverse groove 22 drives the convex shaft frame 23 to rotate. The rotating convex shaft frame 23 drives the tapered roller 24 to move, so that the tapered roller 24 abuts against the wheel of the wheel set. Then the first active telescopic frame 14 and the second active telescopic frame 15 jointly adjust the height of the orbital frame 16, and the first motor 17 drives the first lead screw 18 to rotate. The rotating first lead screw 18 drives the suspension 19 to move. The suspension 19 drives the convex shaft frame 23 to move to move the wheel set supported by the tapered roller 24.

[0040] In a case of this embodiment, the gearbox docking assembly 26 includes a hole frame 27 slidably connected with the I-shaped groove 25. A plurality of connection holes are formed on the hole frame 27. The hole frame 27 is threadedly connected with a screw rod 29. The screw rod 29 is fixedly connected with a crank 30. Rotate the crank 30 so that the screw rod 29 abuts against the suspension 19 to limit the movement of the hole frame 27. Then use a threaded component to connect the hole frame 27 with the gearbox of the independent power assembly of the wheel set, so that the gearbox docking assembly 26 is connected with the gearbox of the independent power assembly of the wheel set, thereby facilitating the suspension 19 to move the independent power assembly connected to the wheel set by moving the gearbox docking assembly 26, and further moving the wheel set.

[0041] In a case of this embodiment, the imitation-rail driving structure 4 includes two groups of fixed frames 31 fixedly installed on the buried frame 1. The two groups of fixed frames 31 are symmetrically arranged on the buried frame 1. The fixed frame 31 is fixedly connected with a clutch 32. The clutch 32 is coaxially and fixedly connected with a servo motor 36. The servo motor 36 is fixedly connected with the fixed frame 31. One end of the clutch 32 away from the servo motor 36 is connected with a speed reducer 34. The speed reducer 34 is fixedly installed on the top surface of the fixed frame 31. The output end of the speed reducer 34 is coaxially connected with an optical encoder 35. The output end of the speed reducer 34 is coaxially and fixedly connected with a conical surface carrier wheel 33. The fixed frame 31 is fixedly connected with a fourth active telescopic frame 37. The mobile end of the fourth active telescopic frame 37 is fixedly connected with an assisting support plate 38. The assisting support plate 38 is movably connected with the conical surface carrier wheel 33. The servo motor 36 drives the input end of the speed reducer 34 to rotate through the clutch 32, so that the speed reducer 34 drives the conical surface carrier wheel 33 to rotate. The rotating conical surface carrier wheel 33 rubs against the wheels of the wheel pair, so that the wheels rotate. When the wheels rotate actively, the clutch 32 disconnects the power connection between the servo motor 36 and the speed reducer 34, and the optical encoder 35 measures the angle rotated by the output end of the speed reducer 34 in real time.

[0042] In a case of this embodiment, the variable pitch and lifting part 6 includes two groups of active telescopic rods 39 fixedly connected with the buried frame 1. The mobile ends of the two groups of active telescopic rods 39 are jointly fixedly connected with a cross frame 40. The cross frame 40 is slidably connected with multiple groups of guiding frames slidably connected with the buried frame 1. A double-output shaft motor 41 is fixedly installed in the middle of the cross frame 40. The output end of the double-output shaft motor 41 is fixedly connected with a second lead screw 42. The second lead screw 42 is threadedly connected with a slider 43 slidably connected with the cross frame 40. The slider 43 is fixedly connected with the linkage seat 8. The active telescopic rods 39 drive the cross frame 40 to move to adjust the height of the cross frame 40. The cross frame 40 drives the double-output shaft motor 41 to move longitudinally. And the double-output shaft motor 41 drives the second lead screw 42 to rotate. The rotating second lead screw 42 drives the slider 43 to move on the cross frame 40 to adjust the distance between the bearing clamping and limiting parts 7, and at the same time adjust the height of the bearing clamping and limiting parts 7.

[0043] In a case of this embodiment, the semi-circular rotation limiting assembly 11 includes a connecting frame 44. The connecting frame 44 of the semi-circular rotation limiting assembly 11 installed on the swing arm 10 is fixedly connected to the swing arm 10, and the connecting frame 44 of the semi-circular rotation limiting assembly 11 installed on the linkage seat 8 is fixedly connected to the linkage seat 8. The connecting frame 44 is fixedly connected with a rotation limiting frame 45. The rotation limiting frame 45 is rotatably connected with a semi-ring frame 46. The semi-ring frame 46 is fixedly connected with a semi-circular gear ring 47. The connecting frame 44 is fixedly connected with a second motor 48. The output end of the second motor 48 is fixedly connected with a gear 49 meshing with the semi-circular gear ring 47. The semi-circular gear ring 47 is fixedly connected with three sets of sleeves 50. Each set of connecting frames 44 is fixedly connected with three rectangular sleeves 51. The rectangular sleeve 51 is slidably connected with an extension bar 52. The extension bar 52 is fixedly connected with a support rod 53 slidably connected with the sleeve 50. The extension bar 52 is fixedly connected with a pressure sensor 54. The pressure sensor 54 is fixedly connected with a sleeve frame 55. The sleeve frame 55 is connected with a housing 56 through a plurality of bolts. The housing 56 is fixedly connected with an arc-shaped concave frame 57. After two rotation limiting frames 45 in the same semi-circular rotation limiting assembly 11 abut against each other, the second motor 48 drives the gear 49 to rotate. The gear 49 drives the semi-circular gear ring 47 to rotate. The semi-circular gear ring 47 drives the sleeve 50 to rotate. The sleeve 50 drives the support rod 53 to move. The moving support rod 53 drives the extension bar 52 to move. The extension bar 52 drives the sleeve frame 55 to move through the pressure sensor 54. The sleeve frame 55 drives the housing 56 to move to adjust the positions of the housing 56 and the arc-shaped concave frame 57. The arc-shaped concave frame 57 restricts the movement and rotation of the outer ring of the bearing by clamping the outer ring of the bearing and applying frictional force to the outer wall of the outer ring of the bearing. By removing the bolts, the housing 56 can be detached from the sleeve frame 55 to facilitate the replacement operation of the housing 56 and the arc-shaped concave frame 57, so that the semi-circular rotation limiting assembly 11 can be adapted to bearings of different sizes.

[0044] Embodiment 2. On the basis of Embodiment 1, refer to Figure 1 、 Figure 5 、 Figure 12, the ultrasonic flaw detection structure 12 includes two groups of fifth active telescopic frames 58, the two groups of fifth active telescopic frames 58 are respectively fixedly installed on the two fixed frames 31, the mobile end of the fifth active telescopic frame 58 is fixedly connected with a sixth active telescopic frame 59, the mobile end of the sixth active telescopic frame 59 is fixedly connected with a first ultrasonic probe 60, the frame 2 is fixedly connected with a track frame 61, the track frame 61 is fixedly connected with a third motor 62, the output end of the third motor 62 is fixedly connected with a reverse threaded rod 63, the reverse threaded rod 63 is provided with two groups of symmetric and reverse threads, the reverse threaded rod 63 is threadedly connected with two symmetrically arranged transverse shift sleeves 64, the transverse shift sleeves 64 are slidably connected with the track frame 61, the transverse shift sleeves 64 are fixedly connected with a seventh active telescopic frame 65, and the mobile end of the seventh active telescopic frame 65 is fixedly connected with a second ultrasonic probe 66. The fifth active telescopic frame 58 is used to adjust the height of the sixth active telescopic frame 59. The sixth active telescopic frame 59 makes the first ultrasonic probe 60 abut against the wheel of the wheel set by means of active extension, so as to perform flaw detection operation on the wheel of the wheel set. The third motor 62 drives the reverse threaded rod 63 to rotate, and rotating the reverse threaded rod 63 drives the two groups of transverse shift sleeves 64 to move, so as to adjust the distance between the two groups of seventh active telescopic frames 65, and further adjust the distance between the two groups of second ultrasonic probes 66. With the active extension of the seventh active telescopic frame 65, the second ultrasonic probe 66 abuts against the outer surface of the axle of the wheel set, and then the second ultrasonic probe 66 performs ultrasonic flaw detection operation on the axle.

[0045] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A wheel set flaw detection test bench for rail transit locomotives and vehicles, including a buried frame, the buried frame is fixedly connected with a frame, and the frame is fixedly connected with a console, characterized in that, Further comprising: A wheel set limit and lifting structure connected to the buried frame. The wheel set limit and lifting structure is used to provide limit for the wheel set to be detected and driving force for adjusting the position of the wheel set to be detected. The wheel set limit and lifting structure includes a pad floor fixedly connected to the buried frame. Two groups of first active telescopic frames are fixedly connected to the pad floor. Two groups of second active telescopic frames are fixedly connected to the buried frame. The mobile ends of the two groups of second active telescopic frames are jointly fixedly connected with a track frame. The track frame is fixedly connected to the mobile ends of the two groups of first active telescopic frames. A first motor is fixedly connected to the track frame. The output end of the first motor is fixedly connected with a first lead screw. The first lead screw is threadedly connected with a suspension. The suspension is rotatably connected with a plurality of caster wheels arranged in the groove of the track frame. Two groups of third active telescopic frames are fixedly connected to the suspension. The mobile end of the third active telescopic frame is fixed with a double-groove plate. Two symmetrically arranged transverse grooves are formed on the double-groove plate. Each transverse groove is slidably connected with a convex shaft frame. The convex shaft frame is fixedly connected with a tapered roller. The convex shaft frame is rotatably connected with the suspension. An I-shaped groove is formed on the suspension. A gearbox docking component is movably installed on the I-shaped groove. The gearbox docking component includes a hole frame slidably connected with the I-shaped groove. A plurality of connection holes are formed on the hole frame. A screw is threadedly connected to the hole frame. The screw is fixedly connected with a crank. A rail-simulating driving structure connected to the buried frame. The rail-simulating driving structure enables the wheel set to obtain torque by applying frictional force to the wheel set. When the wheel set rotates actively, the rail-simulating driving structure provides limit support for the wheel set and conducts corner measurement operations. A bearing limit and supporting structure connected to the buried frame. The bearing limit and supporting structure includes a variable-distance lifting part connected to the buried frame. The variable-distance lifting part is connected with two symmetrically arranged bearing clamping and limiting parts. The bearing clamping and limiting part includes a linkage seat connected to the variable-distance lifting part. A driving motor is fixedly connected to the linkage seat. The driving motor is fixedly connected with a rotating arm. A semi-circular rotation limit component is fixedly connected to each of the rotating arm and the linkage seat. The two semi-circular rotation limit components are movably connected to each other. An ultrasonic flaw detection structure connected to the rail-simulating driving structure.

2. The rail transit locomotive and rolling stock wheel set flaw detection test bench according to claim 1, characterized in that The rail-simulating driving structure includes two fixed frames fixedly installed on the buried frame. The two fixed frames are symmetrically arranged on the buried frame. A clutch is fixedly connected to the fixed frame. A servo motor is coaxially fixedly connected to the clutch. The servo motor is fixedly connected with the fixed frame. One end of the clutch away from the servo motor is connected with a reducer. The reducer is fixedly installed on the top surface of the fixed frame. An optical encoder is coaxially connected to the output end of the reducer. A conical surface carrier wheel is coaxially fixedly connected to the output end of the reducer. A fourth active telescopic frame is fixedly connected to the fixed frame. The mobile end of the fourth active telescopic frame is fixedly connected with an assisting support plate. The assisting support plate is movably connected with the conical surface carrier wheel.

3. A rail transit locomotive and vehicle wheel set flaw detection test bench according to claim 1, characterized in that, The variable pitch lifting part includes two groups of active telescopic rods fixedly connected to the buried frame. The moving ends of the two groups of active telescopic rods are fixedly connected to a cross frame. A double-output shaft motor is fixedly installed in the middle of the cross frame. The output end of the double-output shaft motor is fixedly connected to a second lead screw. The second lead screw is threadedly connected to a slider that is slidably connected to the cross frame. The slider is fixedly connected to the linkage seat.

4. A rail transit locomotive and rolling stock wheel set flaw detection test bench according to claim 1, characterized in that, The semi-circular rotation limiting component includes a connecting frame. The connecting frame of the semi-circular rotation limiting component installed on the rotating arm is fixedly connected to the rotating arm. The connecting frame of the semi-circular rotation limiting component installed on the linkage seat is fixedly connected to the linkage seat. The connecting frame is fixedly connected to a rotation limiting frame. The rotation limiting frame is rotatably connected to a semi-circular ring frame. The semi-circular ring frame is fixedly connected to a semi-circular gear ring. The connecting frame is fixedly connected to a second motor. The output end of the second motor is fixedly connected to a gear that meshes with the semi-circular gear ring. The semi-circular gear ring is fixedly connected to three groups of sleeves. Each group of connecting frames is fixedly connected to three groups of rectangular sleeves. The rectangular sleeves are slidably connected to extension bars. The extension bars are fixedly connected to support rods that are slidably connected to the sleeves. The extension bars are fixedly connected to pressure sensors. The pressure sensors are fixedly connected to sleeve frames. The sleeve frames are connected to a housing through multiple bolts. The housing is fixedly connected to an arc-shaped concave frame.

5. The wheel set flaw detection test bench for rail transit locomotives and rolling stock according to claim 2, characterized in that, The ultrasonic flaw detection structure includes a fifth active telescopic frame fixedly connected to the fixed frame. The moving end of the fifth active telescopic frame is fixedly connected to a sixth active telescopic frame. The moving end of the sixth active telescopic frame is fixedly connected to a first ultrasonic probe. The frame is fixedly connected to an orbital frame. The orbital frame is fixedly connected to a third motor. The output end of the third motor is fixedly connected to a reverse threaded rod. The reverse threaded rod is threadedly connected to two symmetrically arranged transverse moving sleeves. The transverse moving sleeves are slidably connected to the orbital frame. The transverse moving sleeves are fixedly connected to a seventh active telescopic frame. The moving end of the seventh active telescopic frame is fixedly connected to a second ultrasonic probe.

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