Aviation end tooth fretting fatigue detection device based on ultrasonic flaw detection technology

Abstract

The utility model belongs to the technical field of ultrasonic nondestructive testing, and particularly relates to an aviation end tooth fretting fatigue detection device based on an ultrasonic flaw detection technology, which comprises a stand base, a round head vertical plate is fixedly connected onto the stand base, and a lifting plate is slidably arranged on the round head vertical plate. The side, away from the round-head vertical plate, of the lifting plate is fixedly connected with one end of a telescopic piece, the other end of the telescopic piece is fixedly connected with a tray, an ultrasonic detection mechanism is fixedly arranged on the tray and used for detecting aviation end teeth, and a positioning manipulator is fixedly arranged at the bottom end of the ultrasonic detection mechanism. And the ultrasonic detection mechanism is positioned on the aviation end tooth through the positioning manipulator. According to the utility model, automatic and intelligent detection can be realized, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic nondestructive testing, in particular to an aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology. Background Art

[0002] The stable and healthy development of the aviation industry is closely related to my country's sustainable development strategy. Aviation gears are key components of aircraft engines, especially high-performance end gears, which are the leaders among key components of aircraft engines. However, as the service time increases, the superposition of residual compressive stress and working compressive stress increases to the maximum value at a certain moment. Under the repeated action of this excessive contact stress, fine fatigue cracks will occur on the surface of the end gear, that is, fretting fatigue. When stress concentration occurs at the root of the tooth, this excessive stress concentration phenomenon will cause the gear teeth to break, and then cause the end gear to lose its transmission performance.

[0003] Therefore, the current end gear micro-motion fatigue detection device has the problem of low detection efficiency due to the inconvenience of moving the positioning of the aviation gear during the detection process due to its excessive weight. Utility Model Content

[0004] The utility model aims to provide an aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology to solve the problems existing in the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides an aviation end tooth micro-motion fatigue detection device based on ultrasonic flaw detection technology, including a platform base, a round head vertical plate is fixedly connected to the platform base, a lifting plate is slidably arranged on the round head vertical plate, one end of a telescopic member is fixedly connected to the side of the lifting plate away from the round head vertical plate, the other end of the telescopic member is fixedly connected to a tray, an ultrasonic detection mechanism is fixedly arranged on the tray, the ultrasonic detection mechanism is used to detect aviation end teeth, a positioning manipulator is fixedly arranged at the bottom end of the ultrasonic detection mechanism, and the ultrasonic detection mechanism is positioned on the aviation end tooth by the positioning manipulator.

[0006] Preferably, a guide rod is fixedly connected to the round head vertical plate, a first slider is slidably connected to the guide rod, a side of the first slider away from the round head vertical plate is fixedly connected to the lifting plate, a motor 1 is fixedly installed on the round head vertical plate, a screw rod 1 is fixedly connected to the output end of the motor 1, a second slider is threadedly connected to the screw rod 1, the second slider is fixedly connected to the lifting plate, and the screw rod 1 is arranged parallel to the guide rod.

[0007] Preferably, the ultrasonic detection mechanism includes an ultrasonic detection box fixedly mounted on the top of the tray, the ultrasonic detection box is a circular tube structure, one end of a connecting rod is fixedly connected to the top of the inner wall of the ultrasonic detection box, the other end of the connecting rod is fixedly connected to a fixing plate, the bottom end of the fixing plate is fixedly connected to a circular steel plate, the top of the circular steel plate is fixedly connected to an annular table, a ring gear is fixedly sleeved on the annular table, the circular steel plate, the annular table and the ring gear are all coaxially arranged with the ultrasonic detection box, a gap is arranged between the circular steel plate and the ultrasonic detection box, a sliding assembly is slidably connected to the annular table, and an ultrasonic detection assembly is fixedly mounted on the sliding assembly.

[0008] Preferably, the sliding assembly includes a fourth slider, a bottom end of the fourth slider is fixedly connected to a plurality of rollers, the plurality of rollers are respectively slidably arranged along the inner wall of the annular table and the outer wall of the annular table, a motor three is fixedly mounted on the fourth slider, an output end of the motor three is fixedly connected to a gear, the gear is meshed with the ring gear, and the ultrasonic detection assembly is fixedly mounted on the fourth slider.

[0009] Preferably, the ultrasonic detection component includes a shell fixedly mounted on the fourth slider, an ultrasonic transmitting tube fixedly mounted on the bottom end of the shell, the ultrasonic transmitting tube extending out of the outside of the tray, a cylinder 1 coaxially fixedly arranged in the ultrasonic transmitting tube, a mounting seat fixedly mounted on the output end of the cylinder 1, a long hole horizontally opened on the side wall of the ultrasonic transmitting tube, a cylinder 2 is symmetrically arranged on both sides of the mounting seat, the output shaft of the cylinder 2 passes through the long hole and is fixedly mounted with an auxiliary fixing block, the bottom end of the auxiliary fixing block is rotatably connected with a wedge block, the opposite sides of the two wedge blocks are fixedly connected with chips, and two ultrasonic probes are fixedly mounted on the bottom end of the ultrasonic transmitting tube, and the ultrasonic probes are arranged corresponding to the chips.

[0010] Preferably, the positioning robot includes a second motor fixedly mounted on the fixed plate, the circular steel plate is provided with a hole, the output shaft of the second motor passes through the hole and is fixedly connected to a second screw rod, the output shaft of the second motor is coaxially arranged with the circular steel plate, a third slider is threadedly connected to the second screw rod, both ends of the third slider are hinged to one end of a first connecting rod, the two first connecting rods are symmetrically arranged about the second screw rod, two clamping units are fixedly arranged at the bottom end of the circular steel plate, the other ends of the two first connecting rods are respectively hinged to the clamping units, the two clamping units are respectively arranged at the two ends of the third slider, and the two clamping units are symmetrically arranged about the second screw rod.

[0011] Preferably, the gripping unit includes a bracket fixedly mounted on the bottom end of the circular steel plate, an end of the bracket away from the circular steel plate is vertically fixedly connected to a fixed shaft, a connecting plate is hinged on the fixed shaft, the connecting plate is a V-shaped structure, the V-shaped opening of the connecting plate is arranged opposite to the second screw rod, the corner of the connecting plate is hinged on the fixed shaft, one end of the connecting plate is hinged to the first connecting rod, the other end of the connecting plate is hinged to a clamping block, a second connecting rod is arranged between the connecting plate and the second screw rod, one end of the second connecting rod is hinged to the end of the bracket away from the circular steel plate, the other end of the second connecting rod is hinged to the clamping block, and a silicone pad is fixedly arranged on the side of the clamping block away from the second screw rod.

[0012] Preferably, an annular sponge is provided between the tray and the ultrasonic detection box.

[0013] Preferably, the telescopic member is an electric push rod or a hydraulic rod.

[0014] Preferably, a plurality of casters are fixedly mounted on the bottom end of the platform base.

[0015] Compared with the prior art, the utility model has the following advantages and technical effects:

[0016] The utility model provides an aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology, which can adjust the vertical position of the ultrasonic detection mechanism and the positioning manipulator by sliding a lifting plate on a round head vertical plate;

[0017] The horizontal position of the ultrasonic detection mechanism and the positioning manipulator can be adjusted by the telescopic parts provided;

[0018] The positioning manipulator is set up to perform external clamping movement on the inner hole of the aviation end gear to achieve the positioning of the aviation end gear, thereby improving the accuracy of the ultrasonic detection device in positioning the part to be tested of the aviation end gear;

[0019] The ultrasonic testing mechanism can be used to perform all-round circumferential testing on the aviation end teeth.

[0020] The utility model can realize automatic and intelligent detection and improve detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1This is a schematic diagram of the structure of an aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology proposed by the utility model;

[0023] Figure 2 This is a schematic diagram of the sliding connection structure between the lifting plate and the round head vertical plate in the utility model;

[0024] Figure 3 This is the structural intention of the ultrasonic mechanism in the utility model;

[0025] Figure 4 This is a schematic diagram of the sliding connection structure between the sliding assembly and the annular platform in the utility model;

[0026] Figure 5 for Figure 1 A partial enlarged view of the middle A;

[0027] Figure 6 It is a cross-sectional view of an ultrasonic testing component;

[0028] Figure 7 It is a structural schematic diagram of the manipulator in the utility model;

[0029] Among them: 1. Stand base; 2. Round head vertical plate; 3. Connecting rod; 4. Telescopic member; 5. Ultrasonic detection box; 6. Ring sponge; 7. Tray; 8. Shell; 9. Screw rod 2; 10. Guide rod; 11. First slider; 12. Second slider; 13. Motor 1; 14. Screw rod 1; 15. Lifting plate; 16. Motor 2; 17. Fixed plate; 18. Ring gear; 20. Motor 3; 21. Fourth slider; 22. Ring stand; 2 3. Round steel plate; 24. Roller; 25. Gear; 26. Clamp; 27. Bracket; 28. Fixed shaft; 29. ​​Third slider; 30. First connecting rod; 31. Connecting plate; 32. Second connecting rod; 33. Silicone pad; 34. Wedge; 35. Auxiliary fixing block; 36. Ultrasonic transmitting catheter; 37. Ultrasonic probe; 38. Wafer; 39. Caster; 40. Long hole; 41. Cylinder one; 42. Mounting seat; 43. Cylinder two. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Reference Figure 1-Figure 7The utility model provides an aviation end tooth micro-motion fatigue detection device based on ultrasonic flaw detection technology, including a platform base 1, a round head vertical plate 2 is fixedly connected to the platform base 1, a lifting plate 15 is slidably arranged on the round head vertical plate 2, one end of a telescopic member 4 is fixedly connected to the lifting plate 15 away from the round head vertical plate 2, the other end of the telescopic member 4 is fixedly connected to a tray 7, an ultrasonic detection mechanism is fixedly arranged on the tray 7, the ultrasonic detection mechanism is used to detect aviation end teeth, a positioning manipulator is fixedly arranged at the bottom end of the ultrasonic detection mechanism, and the ultrasonic detection mechanism is positioned on the aviation end tooth by the positioning manipulator.

[0032] The lifting plate 15 can slide on the round head vertical plate 2 to adjust the vertical position of the ultrasonic detection mechanism and the positioning manipulator;

[0033] The horizontal position of the ultrasonic detection mechanism and the positioning manipulator can be adjusted by the telescopic member 4;

[0034] The positioning manipulator is set up to perform external clamping movement on the inner hole of the aviation end gear to achieve the positioning of the aviation end gear, thereby improving the accuracy of the ultrasonic detection device in positioning the part to be tested of the aviation end gear;

[0035] The ultrasonic testing mechanism can be used to perform all-round circumferential testing on the aviation end teeth.

[0036] The utility model can realize automatic and intelligent detection and improve detection efficiency.

[0037] Furthermore, a guide rod 10 is fixedly connected to the round head vertical plate 2, and a first slider 11 is slidably connected to the guide rod 10. The side of the first slider 11 away from the round head vertical plate 2 is fixedly connected to the lifting plate 15. A motor 13 is fixedly installed on the round head vertical plate 2, and a screw rod 14 is fixedly connected to the output end of the motor 13. A second slider 12 is threadedly connected to the screw rod 14. The second slider 12 is fixedly connected to the lifting plate 15, and the screw rod 14 is arranged parallel to the guide rod 10.

[0038] In the screw transmission involved in this embodiment, the screw rod adopts a ball screw, the motor adopts a servo motor, and the slider adopts a ball nut; the guide rod 10 is symmetrically arranged at both ends of the screw rod 14.

[0039] The motor 13 drives the screw rod 14 and the second slider 12 to rotate, and the second slider 12 rotates and drives the lifting plate 15 to move on the round head vertical plate 2 under the guidance of the guide rod 10.

[0040] Furthermore, the ultrasonic detection mechanism includes an ultrasonic detection box 5 fixedly installed on the top of the tray 7, the ultrasonic detection box 5 is a circular tube structure, the top of the inner wall of the ultrasonic detection box 5 is fixedly connected to one end of a connecting plate 33, the other end of the connecting plate 33 is fixedly connected to a fixing plate 17, the bottom end of the fixing plate 17 is fixedly connected to a circular steel plate 23, the top of the circular steel plate 23 is fixedly connected to an annular table 22, a ring gear 18 is fixedly sleeved on the annular table 22, the circular steel plate 23, the annular table 22, and the ring gear 18 are all coaxially arranged with the ultrasonic detection box 5, a gap is arranged between the circular steel plate 23 and the ultrasonic detection box 5, a sliding component is slidably connected to the annular table 22, and an ultrasonic detection component is fixedly installed on the sliding component.

[0041] The fixing plate 17 and the circular steel plate 23 can be fixed at the center of the ultrasonic testing box 5 by the connection plate 33 , and a gap is left between the connection plate 33 and the sliding assembly to ensure that the sliding assembly can rotate smoothly on the annular table 22 .

[0042] Furthermore, the sliding assembly includes a fourth slider 21, and a plurality of rollers 24 are fixedly connected to the bottom end of the fourth slider 21. The plurality of rollers 24 are respectively slidably arranged along the inner wall of the annular table 22 and the outer wall of the annular table 22. A motor 3 20 is fixedly installed on the fourth slider 21, and a gear 25 is fixedly connected to the output end of the motor 3 20. The gear 25 is meshed with the ring gear 18. The ultrasonic detection assembly is fixedly installed on the fourth slider 21.

[0043] The gear 25 is meshed with the collar gear 18 to drive the fourth slider 21 to make a circular motion along the annular platform 22 under the guidance of the roller 24 .

[0044] Furthermore, the ultrasonic detection component includes a shell 8 fixedly mounted on the fourth slider 21, an ultrasonic transmitting tube 36 is fixedly mounted on the bottom end of the shell 8, a cylinder is arranged inside the ultrasonic transmitting tube 36 and the shell 8 to realize the up and down movement function of the ultrasonic transmitting tube 36, the ultrasonic transmitting tube 36 extends out of the outside of the tray 7, a cylinder 1 41 is coaxially fixedly arranged inside the ultrasonic transmitting tube 36, a mounting seat 42 is fixedly mounted on the output end of the cylinder 1 41, a long hole 40 is horizontally opened on the side wall of the ultrasonic transmitting tube 36, cylinder 2 43 is symmetrically arranged on both sides of the mounting seat 42, the output shaft of cylinder 2 43 passes through the long hole 40 and is fixedly mounted with an auxiliary fixing block 35, the bottom end of the auxiliary fixing block 35 is rotatably connected with a wedge block 34, the opposite sides of the two wedge blocks 34 are fixedly connected with a chip 38, two ultrasonic probes 37 are fixedly arranged at the bottom end of the ultrasonic transmitting tube 36, and the ultrasonic probes 37 are arranged corresponding to the chip 38.

[0045] The chip 38 is provided to facilitate the propagation of ultrasonic waves into the medium of the wedge block 34. A corresponding ultrasonic probe 37 is provided above the center of the chip 38. The two ultrasonic probes 37 have the function of transmitting ultrasonic waves and receiving feedback waves. The auxiliary fixing block 35 can slide up and down on the long hole 40 on the ultrasonic transmitting tube 36 through the provided cylinder 1 41, and can synchronously contract in the horizontal direction on the outer wall of the ultrasonic transmitting tube 36 through the provided cylinder 2 43. The two functions are used to compensate for the angle change between the wedge block 34 and the chip 38 caused by the rotation of the wedge block 34 on the auxiliary fixing block 35, thereby improving the accuracy and efficiency of detection.

[0046] Furthermore, the positioning robot includes a motor 16 fixedly mounted on a fixed plate 17, a hole is opened on the circular steel plate 23, the output shaft of the motor 16 passes through the hole and is fixedly connected to a screw rod 9, the output shaft of the motor 16 is coaxially arranged with the circular steel plate 23, a third slider 29 is threadedly connected to the screw rod 9, both ends of the third slider 29 are hinged to one end of a first connecting rod 30, the two first connecting rods 30 are symmetrically arranged about the screw rod 9, two clamping units are fixedly arranged at the bottom end of the circular steel plate 23, the other ends of the two first connecting rods 30 are respectively hinged to the clamping units, the two clamping units are respectively arranged at the two ends of the third slider 29, and the two clamping units are symmetrically arranged about the screw rod 9.

[0047] The motor 2 16 is provided to drive the screw rod 2 9 to rotate, and the third slider 29 moves on the screw rod 2 9 under the limiting action of the first connecting rod 30. The movement of the third slider 29 drives the two gripping units to approach or separate from each other through the first connecting rod 30, thereby achieving the fixation or separation of the end teeth.

[0048] Furthermore, the gripping unit includes a bracket 27 fixedly mounted on the bottom end of the circular steel plate 23, and the end of the bracket 27 away from the circular steel plate 23 is vertically fixedly connected to a fixed shaft 28, and a connecting plate 31 is hinged on the fixed shaft 28. The connecting plate 31 is a V-shaped structure, and the V-shaped opening of the connecting plate 31 is arranged opposite to the screw rod 29. The corner of the connecting plate 31 is hinged on the fixed shaft 28, one end of the connecting plate 31 is hinged to the first connecting rod 30, and the other end of the connecting plate 31 is hinged to a clamping block 26, and a second connecting rod 32 is arranged between the connecting plate 31 and the screw rod 29, one end of the second connecting rod 32 is hinged to the end of the bracket 27 away from the circular steel plate 23, and the other end of the second connecting rod 32 is hinged to the clamping block 26, and a silicone pad 33 is fixedly arranged on the side of the clamping block 26 away from the screw rod 29.

[0049] The first connecting rod 30 is set to push and pull the connecting plate 31, so that the connecting plate 31 rotates on the fixed shaft 28, thereby driving the clamping block 26 to move, and under the limiting action of the second connecting rod 32, the two clamping blocks 26 are synchronously approached or separated. When they are separated from each other, the distance between the two clamping blocks 26 continues to expand until the outer sides of the two clamping blocks 26 are clamped on the inner hole wall of the end teeth, thereby realizing the expansion positioning of the end teeth. Otherwise, the two clamping blocks 26 are separated from the end teeth.

[0050] Furthermore, in order to reduce vibration and prevent hard contact, an annular sponge 6 is provided between the tray 7 and the ultrasonic testing box 5 .

[0051] Furthermore, the telescopic member 4 is a kind of electric push rod or hydraulic rod. In this embodiment, the electric push rod is adopted.

[0052] Furthermore, in order to facilitate the movement of the device, a plurality of casters 39 are fixedly mounted on the bottom end of the stand base 1. In this embodiment, the casters 39 are universal wheels.

[0053] The utility model provides an aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology, and the specific use steps and working principle are as follows:

[0054] S1. Through the universal wheel at the bottom of the platform base 1 and the sliding lifting plate 15, the positioning manipulator is extended into the inner hole of the aviation end tooth to realize the preliminary positioning of the aviation end tooth in space by the device, and the preliminary positioning is completed.

[0055] S2. The positioning manipulator is driven by the motor 2 16 to realize the outer clamping movement of the inner hole of the aviation end gear. At the same time, the annular sponge 6 plays the role of positioning buffer, and the telescopic part 4 can realize the fine adjustment of the horizontal position, and finally realize the precise positioning of the ultrasonic detection mechanism and the aviation end gear.

[0056] S3. The ultrasonic transmitting catheter 36 slides in the inner groove at the bottom of the shell 8, so that the detection part of the device can be positioned on the tooth side of the aviation end tooth; a cylinder is provided inside the ultrasonic transmitting catheter 36 and the shell 8, so that the ultrasonic transmitting catheter 36 is extended, so that the wedge block 34 can be closely fitted with the tooth side of the aviation end tooth.

[0057] S4. Longitudinal waves are emitted through the ultrasonic probe 37. The longitudinal waves pass through the first layer of medium (air), through the chip 38, and through the second layer of medium (wedge block 34), thereby realizing flaw detection of the tooth sides and tooth roots of the aviation end teeth. The actual condition of the micro-motion fatigue damage of the detected part can be analyzed by receiving the refracted longitudinal waves, and then the telescopic mechanism of the ultrasonic transmitting catheter 36 makes the ultrasonic transmitting catheter 36 retract to the initial position, thereby completing the detection of a single tooth.

[0058] S5. Drive the ultrasonic component through the sliding component to make a circular motion with the center of the center hole of the aviation end tooth as the center point. Repeat the above S3 and S4 to complete the detection of all inter-tooth parts of the aviation end tooth.

[0059] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology, characterized in that: The invention comprises a platform base (1), the platform base (1) is fixedly connected to a round head vertical plate (2), a lifting plate (15) is slidably arranged on the round head vertical plate (2), one end of a telescopic member (4) is fixedly connected to the lifting plate (15) on the side away from the round head vertical plate (2), the other end of the telescopic member (4) is fixedly connected to a tray (7), an ultrasonic detection mechanism is fixedly arranged on the tray (7), the ultrasonic detection mechanism is used to detect aviation end teeth, a positioning manipulator is fixedly arranged at the bottom end of the ultrasonic detection mechanism, and the ultrasonic detection mechanism is positioned on the aviation end teeth by the positioning manipulator.

2. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 1 is characterized in that: A guide rod (10) is fixedly connected to the round head vertical plate (2), a first slider (11) is slidably connected to the guide rod (10), a side of the first slider (11) away from the round head vertical plate (2) is fixedly connected to the lifting plate (15), a motor (13) is fixedly installed on the round head vertical plate (2), a screw rod (14) is fixedly connected to the output end of the motor (13), a second slider (12) is threadedly connected to the screw rod (14), the second slider (12) is fixedly connected to the lifting plate (15), and the screw rod (14) is arranged parallel to the guide rod (10).

3. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 1 is characterized in that: The ultrasonic detection mechanism comprises an ultrasonic detection box (5) fixedly mounted on the top of the tray (7); the ultrasonic detection box (5) is a circular tube structure; the top of the inner wall of the ultrasonic detection box (5) is fixedly connected to one end of a connecting rod (3); the other end of the connecting rod (3) is fixedly connected to a fixing plate (17); the bottom end of the fixing plate (17) is fixedly connected to a circular steel plate (23); the top of the circular steel plate (23) is fixedly connected to an annular table (22); a collar gear (18) is fixedly sleeved on the annular table (22); the circular steel plate (23), the annular table (22) and the collar gear (18) are all coaxially arranged with the ultrasonic detection box (5); a gap is arranged between the circular steel plate (23) and the ultrasonic detection box (5); a sliding component is slidably connected to the annular table (22); an ultrasonic detection component is fixedly mounted on the sliding component.

4. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 3 is characterized in that: The sliding assembly comprises a fourth sliding block (21), the bottom end of the fourth sliding block (21) is fixedly connected to a plurality of rollers (24), the plurality of rollers (24) are respectively slidably arranged along the inner wall of the annular platform (22) and the outer wall of the annular platform (22), a motor three (20) is fixedly mounted on the fourth sliding block (21), the output end of the motor three (20) is fixedly connected to a gear (25), the gear (25) is meshed with the ring gear (18), and the ultrasonic detection assembly is fixedly mounted on the fourth sliding block (21).

5. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 4 is characterized in that: The ultrasonic detection assembly comprises a shell (8) fixedly mounted on the fourth slider (21), an ultrasonic transmitting tube (36) fixedly mounted on the bottom end of the shell (8), the ultrasonic transmitting tube (36) extending out of the outside of the tray (7), a cylinder (41) coaxially fixedly arranged inside the ultrasonic transmitting tube (36), a mounting seat (42) fixedly mounted on the output end of the cylinder (41), a long strip hole (40) horizontally opened on the side wall of the ultrasonic transmitting tube (36), Cylinder 2 (43) is symmetrically arranged on both sides of the mounting seat (42), the output shaft of the cylinder 2 (43) passes through the long hole (40) and is fixedly installed with an auxiliary fixing block (35), the bottom end of the auxiliary fixing block (35) is rotatably connected with a wedge block (34), and the opposite sides of the two wedge blocks (34) are fixedly connected with a chip (38), and two ultrasonic probes (37) are fixedly arranged at the bottom end of the ultrasonic transmitting catheter (36), and the ultrasonic probes (37) are arranged corresponding to the chip (38).

6. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 3 is characterized in that: The positioning robot comprises a second motor (16) fixedly mounted on the fixed plate (17), a hole is opened on the circular steel plate (23), the output shaft of the second motor (16) passes through the hole and is fixedly connected to the second screw rod (9), the output shaft of the second motor (16) is coaxially arranged with the circular steel plate (23), the second screw rod (9) is threadedly connected with a third slider (29), both ends of the third slider (29) are hinged with one end of a first connecting rod (30), the two first connecting rods (30) are symmetrically arranged with respect to the second screw rod (9), two gripping units are fixedly arranged at the bottom end of the circular steel plate (23), the other ends of the two first connecting rods (30) are respectively hinged to the gripping units, the two gripping units are respectively arranged at the two ends of the third slider (29), and the two gripping units are symmetrically arranged with respect to the second screw rod (9).

7. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 6 is characterized in that: The gripping unit comprises a bracket (27) fixedly mounted on the bottom end of the circular steel plate (23), one end of the bracket (27) away from the circular steel plate (23) is vertically fixedly connected to a fixed shaft (28), a connecting plate (31) is hinged on the fixed shaft (28), the connecting plate (31) is a V-shaped structure, the V-shaped opening of the connecting plate (31) is arranged opposite to the screw rod 2 (9), the corner of the connecting plate (31) is hinged on the fixed shaft (28), and the connecting plate (31) is hinged on the fixed shaft (28). ) is hinged to the first connecting rod (30), the other end of the connecting plate (31) is hinged with a clamping block (26), a second connecting rod (32) is arranged between the connecting plate (31) and the second screw rod (9), one end of the second connecting rod (32) is hinged to an end of the bracket (27) away from the circular steel plate (23), the other end of the second connecting rod (32) is hinged to the clamping block (26), and a silicone pad (33) is fixedly arranged on the side of the clamping block (26) away from the second screw rod (9).

8. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 3 is characterized in that: An annular sponge (6) is provided between the tray (7) and the ultrasonic detection box (5).

9. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 1 is characterized in that: The telescopic member (4) is a kind of electric push rod or hydraulic rod.

10. The aviation end gear micro-motion fatigue detection device based on ultrasonic flaw detection technology according to claim 1 is characterized in that: A plurality of casters (39) are fixedly mounted on the bottom end of the platform base (1).

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