Four-way vehicle track impact force testing device

Abstract

The invention relates to the technical field of impact testing devices, in particular to a four-way vehicle track impact force testing device.Sliding bases are installed at the two ends of the top side of a base correspondingly, installation frames are installed on the sliding bases, bridge shore plates are installed on the installation frames, and bridge pier installation plates are installed in the middle of the base; wherein the end part of the two-span four-lane bridge model is connected with the bridge shore plate, and piers at the bottom of the two-span four-lane bridge model are mounted on the pier mounting plate; the impact mechanism moves on the pier mounting plate, so that subsequent impact tests can be conveniently carried out on piers at different positions, the lifting frame ascends and descends, the height of the slideway rod is adjusted, impact tests can be carried out on point positions at different heights of the piers, the rotary table rotates, the angle of the slideway rod is conveniently adjusted, and impact tests at different angles can be conveniently simulated on the piers; after adjustment is completed, the guide rod stretches out and draws back in the slide way rod, the moving path of the impact ball is guided, it is guaranteed that the impact ball smoothly impacts the pier, and then impact force testing of any point position is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of impact testing devices, and in particular to a four-way vehicle track impact force testing device. Background Art

[0002] When conducting an impact force test on a two-span, four-lane bridge model, the impact points and angles of the ship and the bridge pier are different under different water levels. The tonnage and speed of the ship are also different. The existing impact force testing device has a single test condition, which leads to limitations in the test results. Summary of the invention

[0003] The problem to be solved by the present invention is to provide a four-way vehicle track impact force testing device, which solves the technical problem that when performing an impact force test on a two-span four-lane bridge model, under different water levels, the collision points and angles of a ship and a bridge pier are different, and the tonnage and speed of the ship are also different. The existing impact force testing device has a single testing condition, which leads to limitations in the test results.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A four-way vehicle track impact force testing device comprises a base, two ends of the top side of the base are respectively installed with slides, a mounting frame is installed on the slide, and a bridge bank plate is installed on the mounting frame, a pier mounting plate is installed in the middle of the base, wherein the end of a two-span four-lane bridge model is connected to the bridge bank plate, and the piers at the bottom of the two-span four-lane bridge model are installed on the pier mounting plate, an impact mechanism is slidably installed on the side wall of the pier mounting plate, and a testing mechanism is installed on the side wall of the base; The impact mechanism comprises a slider, a lifting frame is installed on the slider, and a turntable is rotatably installed on the lifting frame, a fixed plate is fixedly installed on the turntable, and a slide plate is slidably installed on the turntable, a slide rod is installed on both the fixed plate and the slide plate, and a guide rod is telescopically installed on the end of the slide rod, a mounting oblique arm parallel to the slide rod is installed on the turntable, a translation seat is slidably installed on the mounting oblique arm, and the translation seat is connected to the impact ball on the slide rod through a connecting wire; The testing mechanism includes an ultrasonic testing probe for internal flaw detection of a two-span four-lane bridge model.

[0005] Preferably, a slide rail is provided on the top side of the base, and the slide seat moves along the slide rail, a bolt is threadedly mounted on the slide seat, and the bottom end of the bolt contacts the slide rail; A first pneumatic cylinder is installed at the center of the top side of the base, and the telescopic end of the first pneumatic cylinder is connected to the pier mounting plate. Guide rods are installed around the bottom side of the pier mounting plate, and guide sleeves that slide with the guide rods are installed around the top side of the base.

[0006] Preferably, a first motor is installed at the end of the pier mounting plate, and a first threaded rod threadably connected to the slider is installed at the output end of the first motor.

[0007] Preferably, a second pneumatic cylinder is installed on the bottom side of the slider, and the telescopic end of the second pneumatic cylinder is connected to the lifting frame; A second motor is installed in the lifting frame, and an output end of the second motor is connected to the turntable.

[0008] Preferably, the turntable is symmetrically installed with first shaft seats, and a bidirectional threaded rod and a sliding rod passing through the fixed plate and the skateboard are installed between the two first shaft seats, and the bidirectional threaded rod and the skateboard are threadedly connected, and a third motor is installed on one of the first shaft seats, and the third motor is connected to the bidirectional threaded rod.

[0009] Preferably, a rod groove is opened in the slide rod, a second threaded rod and a support rod are installed in the rod groove, the guide rod is threadedly connected to the second threaded rod, and the guide rod is slidably connected to the support rod, a motor is installed on the slide rod, and the motor output end is connected to the second threaded rod.

[0010] Preferably, a fourth motor is installed at the top end of the mounting oblique arm, and a third threaded rod threadably connected to the translation seat is installed at the output end of the fourth motor.

[0011] Preferably, a storage groove is provided on the translation seat, a fifth motor is installed at the end of the translation seat, and a wire roller is installed in the storage groove at the output end of the fifth motor, a connecting wire is wound on the wire roller, and second shaft seats are symmetrically installed on the translation seat, a sixth motor is installed on one of the second shaft seats, and the output end of the sixth motor is connected to the T-shaped barrier arm.

[0012] Preferably, the testing mechanism also includes an electric slide rail, an electric slider is slidably installed on the electric slide rail, a vertical frame is vertically installed on the electric slider, a seventh motor is installed on the top of the vertical frame, and a fourth threaded rod is installed on the output end of the seventh motor, the fourth threaded rod is threadedly connected to the horizontally arranged lifting frame, an eighth motor is installed on the end of the lifting frame, the output end of the eighth motor is connected to the fifth threaded rod, the fifth threaded rod is threadedly connected to the translation frame, a ninth motor is installed on the end of the translation frame, a sixth threaded rod is installed on the output end of the ninth motor, and the sixth threaded rod is threadedly connected to the detection movable seat.

[0013] Preferably, a bottom groove is formed at the bottom end of the detection movable seat, a tenth motor is installed on the side wall of the detection movable seat, a rotating shaft is installed at the output end of the tenth motor, and an ultrasonic detection probe is installed on the rotating shaft.

[0014] The beneficial effects of the present invention are as follows: the impact mechanism moves on the pier mounting plate, which is convenient for subsequent impact tests on piers at different positions; the lifting frame is raised and lowered to adjust the height of the slide rod, which is used to perform impact tests on points at different heights of the pier; the turntable rotates, which is convenient for adjusting the angle of the slide rod, which is convenient for simulating impact tests on the pier at different angles; after the adjustment is completed, the guide rod is extended and retracted in the slide rod to guide the moving path of the impact ball, thereby ensuring that the impact ball smoothly impacts the pier, thereby realizing the impact force test at any point; The translation seat moves along the installation oblique arm to adjust the height of the translation seat and the impact ball. At the same time, the impact ball connected by the connecting wire is easy to replace, and the distance between the two slide rods is adjusted according to the size of the replaced impact ball. When performing the impact force test, the impact strength and impact speed can be adjusted; Before impact, the wire roller rotates to wind the connecting wire and pull the impact ball to realize recovery, and at the same time, the T-shaped blocking arm rotates to block the impact ball. During impact, the wire roller rotates to release the connecting wire, and then the T-shaped blocking arm rotates upward to separate from the impact ball, realizing automatic retraction and release of the impact ball, which is convenient for realizing multiple impact force tests when no one is watching; The ultrasonic detection probe can be adjusted in multiple directions through the testing mechanism. During flaw detection, the ultrasonic detection probe can be translated along the top side of the bridge and raised and lowered along the piers. The detection angle can be adjusted by rotating the ultrasonic detection probe, thereby achieving all-round flaw detection of the bridge and piers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is an overall side view of the present invention; Figure 3 It is a schematic diagram of the first structure of the impact mechanism of the present invention; Figure 4 It is a second structural schematic diagram of the impact mechanism of the present invention; Figure 5 It is a partial cross-sectional view of the slideway rod of the present invention; Figure 6 It is a schematic diagram of the structure of the testing mechanism of the present invention; Figure 7 It is a side view of the testing mechanism of the present invention.

[0016] Reference numerals: 1. Base; 2. Slide rail; 3. Slide seat; 4. Mounting frame; 5. Bridge shore plate; 6. First pneumatic cylinder; 7. Pier mounting plate; 8. Guide rod; 9. Guide sleeve; 10. Impact mechanism; 11. Testing mechanism; 12. First motor; 13. First threaded rod; 14. Sliding block; 15. Second pneumatic cylinder; 16. Lifting frame; 17. Second motor; 18. Turntable; 19. First shaft seat; 20. Third motor; 21. Bidirectional threaded rod; 22. Slide rod; 23. Fixed plate; 24. Slide plate; 25. Slideway rod; 26. Guide rod; 27. Rod groove; 28. Motor; 29. ​​Second threaded rod; 30. Support rod; 31. Mounting The inclined arm; 32. the third threaded rod; 33. the fourth motor; 34. the translation seat; 35. the storage slot; 36. the wire roller; 37. the connecting wire; 38. the impact ball; 39. the fifth motor; 40. the second shaft seat; 41. the sixth motor; 42. the T-shaped stop arm; 43. the electric slide rail; 44. the electric slider; 45. the vertical frame; 46. the fourth threaded rod; 47. the seventh motor; 48. the lifting frame; 49. the eighth motor; 50. the fifth threaded rod; 51. the translation frame; 52. the ninth motor; 53. the sixth threaded rod; 54. the detection movable seat; 55. the bottom slot; 56. the tenth motor; 57. the rotating shaft; 58. the ultrasonic detection probe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Specific examples are given below.

[0019] See also Figure 1 to Figure 7A four-way vehicle track impact force testing device comprises a base 1, a slide 3 is respectively installed at both ends of the top side of the base 1, a mounting frame 4 is installed on the slide 3, and a bridge bank 5 is installed on the mounting frame 4, a pier mounting plate 7 is installed in the middle of the base 1, wherein the end of a two-span four-lane bridge model is connected to the bridge bank 5, and the piers at the bottom of the two-span four-lane bridge model are installed on the pier mounting plate 7, an impact mechanism 10 is slidably installed on the side wall of the pier mounting plate 7, a testing mechanism 11 is installed on the side wall of the base 1, a slide rail 2 is arranged on the top side of the base 1, and the slide 3 moves along the slide rail 2, a bolt is threadedly installed on the slide 3, and the bottom end of the bolt is in contact with the slide rail 2, and the center of the top side of the base 1 A first pneumatic cylinder 6 is installed, and the telescopic end of the first pneumatic cylinder 6 is connected to the pier mounting plate 7. Guide rods 8 are installed around the bottom side of the pier mounting plate 7, and guide sleeves 9 that are slidably mounted with the guide rods 8 are installed around the top side of the base 1. The two-span four-lane bridge is proportionally reduced to make a model, the bolts are loosened, and the slide 3 is slid on the slide rail 2 to ensure that the distance between the two bridge shore plates 5 is adapted to the length of the two-span four-lane bridge model. The pier mounting plate 7 is driven to rise and fall by the first pneumatic cylinder 6 to meet the piers of the two-span four-lane bridge model, and then the two-span four-lane bridge model is installed on the device. According to the test requirements, the impact balls 38 of different masses are connected to the connecting wires 37; The impact mechanism 10 includes a slider 14, a lifting frame 16 is installed on the slider 14, and a turntable 18 is rotatably installed on the lifting frame 16, a fixed plate 23 is fixedly installed on the turntable 18, and a slide plate 24 is slidably installed on the turntable 18, a slide rod 25 is installed on both the fixed plate 23 and the slide plate 24, and a guide rod 26 is telescopically installed at the end of the slide rod 25, a mounting oblique arm 31 parallel to the slide rod 25 is installed on the turntable 18, a translation seat 34 is slidably installed on the mounting oblique arm 31, and the translation seat 34 is connected to the impact ball 38 on the slide rod 25 through a connecting wire 37, a first motor 12 is installed at the end of the pier mounting plate 7, a first threaded rod 13 threadedly connected to the slider 14 is installed at the output end of the first motor 12, and a second air The telescopic end of the second pneumatic cylinder 15 is connected to the lifting frame 16, the lifting frame 16 is equipped with a second motor 17, and the output end of the second motor 17 is connected to the turntable 18, the turntable 18 is symmetrically equipped with a first shaft seat 19, and a bidirectional threaded rod 21 and a slide rod 22 that penetrate the fixed plate 23 and the slide plate 24 are installed between the two first shaft seats 19, and the bidirectional threaded rod 21 and the slide plate 24 are threadedly connected, a third motor 20 is installed on one of the first shaft seats 19, and the third motor 20 is connected to the bidirectional threaded rod 21, a rod groove 27 is opened in the slide rod 25, a second threaded rod 29 and a support rod 30 are installed in the rod groove 27, the guide rod 26 is threadedly connected to the second threaded rod 29, and the guide rod 26 is slidably connected to the support rod 30, and the slide rod 2 5 is installed with a motor 28, and the output end of the motor 28 is connected to the second threaded rod 29, a fourth motor 33 is installed at the top of the installation oblique arm 31, and the output end of the fourth motor 33 is installed with a third threaded rod 32 threadedly connected to the translation seat 34, a storage groove 35 is provided on the translation seat 34, a fifth motor 39 is installed at the end of the translation seat 34, and the output end of the fifth motor 39 is located in the storage groove 35 and a wire roller 36 is installed, and a connecting wire 37 is wound on the wire roller 36, and a second shaft seat 40 is symmetrically installed on the translation seat 34, one of the second shaft seats 40 is installed with a sixth motor 41, and the output end of the sixth motor 41 is connected to the T-shaped stop arm 42, the translation seat 34 moves along the installation oblique arm 31, and the height of the translation seat 34 and the impact ball 38 is adjusted, and the connecting wire 37 is connected at the same time. The impact ball 38 connected by the wire 37 is easy to replace, and the distance between the two slide rods 25 is adjusted according to the size of the replaced impact ball 38. When performing the impact force test, the impact force and impact speed can be adjusted. The first motor 12 drives the first threaded rod 13 to rotate, and then drives the threaded slider 14 to move, adjust the position of the impact mechanism 10, and drive the lifting frame 16 to move up and down through the second pneumatic cylinder 15 to adjust the height of the slide rod 25. The turntable 18 is driven to rotate by the second motor 17 to adjust the angle of the slide rod 25. The second threaded rod 29 is driven to rotate by the motor 28, and then the threaded guide rod 26 is driven to move in the rod groove 27 along the support rod 30 until the end of the guide rod 26 is close to the impact point of the pier.The fourth motor 33 drives the third threaded rod 32 to rotate, thereby driving the threaded translation seat 34 to move along the installation inclined arm 31 to adjust the height of the translation seat 34, and then the fifth motor 39 drives the wire roller 36 to rotate, and the connecting wire 37 is wound and pulled to pull the impact ball 38 up on the slide rod 25, and the sixth motor 41 drives the T-shaped blocking arm 42 to rotate to block the impact ball 38. The impact mechanism 10 moves on the pier mounting plate 7 to facilitate subsequent impact tests on piers at different positions. The lifting frame 16 is raised and lowered to adjust the height of the slide rod 25 for impact tests on points at different heights of the pier. The turntable 18 rotates to facilitate adjustment of the angle of the slide rod 25. , which is convenient for simulating impact tests at different angles on bridge piers. After adjustment, the guide rod 26 is extended and retracted in the slide rod 25 to guide the moving path of the impact ball 38, ensuring that the impact ball 38 can smoothly impact the bridge pier, thereby realizing the impact force test at any point. During the impact, the wire roller 36 rotates to release the connecting wire 37, and then the T-shaped blocking arm 42 rotates upward to separate from the impact ball 38. At this time, the impact ball 38 moves along the slide rod 25 and the guide rod 26 to impact the bridge pier. After the impact is completed, the wire roller 36 rotates to wind the connecting wire 37 and pull the impact ball 38 to achieve recovery, realizing the automatic retraction and release of the impact ball 38, which is convenient for realizing multiple impact force tests when no one is watching. ,

[0020] The test mechanism 11 includes an ultrasonic detection probe 58 for internal flaw detection of a two-span four-lane bridge model. The test mechanism 11 also includes an electric slide rail 43, on which an electric slider 44 is slidably installed, and a vertical frame 45 is vertically installed on the electric slider 44. A seventh motor 47 is installed on the top of the vertical frame 45, and a fourth threaded rod 46 is installed at the output end of the seventh motor 47. The fourth threaded rod 46 is threadedly connected to a horizontally arranged lifting frame 48, and an eighth motor 49 is installed at the end of the lifting frame 48. The output end of the eighth motor 49 is connected to a fifth threaded rod 50, and the fifth threaded rod 50 is threadedly connected to a translation frame 51. A ninth motor 52 is installed at the end of the translation frame 51, a sixth threaded rod 53 is installed at the output end of the ninth motor 52, and the sixth threaded rod 53 is threadedly connected to the detection movable seat 54, a bottom groove 55 is provided at the bottom end of the detection movable seat 54, a tenth motor 56 is installed on the side wall of the detection movable seat 54, a rotating shaft 57 is installed at the output end of the tenth motor 56, and an ultrasonic detection probe 58 is installed on the rotating shaft 57. The fifth threaded rod 50 is driven to rotate by the eighth motor 49 to drive the threaded translation frame 51 to move, so that the translation frame 51 can be moved to the top and bottom sides of the two-span four-lane bridge model before flaw detection, and After the flaw detection, the translation frame 51 moves to overlap with the lifting frame 48, and the fourth threaded rod 46 is driven to rotate by the seventh motor 47, thereby driving the threaded lifting frame 48 to rise and fall, and adjusting the height of the lifting frame 48. The electric slider 44 moves along the electric slide rail 43 to facilitate the movement of the ultrasonic detection probe 58 in the X-axis direction of the two-span four-lane bridge model. The sixth threaded rod 53 is driven to rotate by the ninth motor 52, thereby driving the threaded detection movable seat 54 to move, thereby facilitating the movement of the ultrasonic detection probe 58 in the Y-axis direction of the two-span four-lane bridge model. The rotating shaft is driven by the tenth motor 56 57 is rotated to adjust the detection angle of the ultrasonic detection probe 58. When the ultrasonic detection probe 58 is facing downward, the bridge part of the two-span four-lane bridge model can be inspected. When the ultrasonic detection probe 58 is facing horizontally, the pier part of the two-span four-lane bridge model can be inspected. The ultrasonic detection probe 58 can be adjusted in multiple directions through the testing mechanism 11. During the flaw detection, the ultrasonic detection probe 58 can be moved horizontally along the top side of the bridge and raised and lowered along the pier. The detection angle can be adjusted by rotating the ultrasonic detection probe 58, thereby realizing all-round flaw detection of the bridge and the piers.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A four-way vehicle track impact force testing device, characterized in that: The invention comprises a base (1), wherein two ends of the top side of the base (1) are respectively mounted with slides (3), a mounting frame (4) is mounted on the slide (3), and a bridge bank plate (5) is mounted on the mounting frame (4), a pier mounting plate (7) is mounted in the middle of the base (1), wherein the end of a two-span four-lane bridge model is connected to the bridge bank plate (5), and the piers at the bottom of the two-span four-lane bridge model are mounted on the pier mounting plate (7), an impact mechanism (10) is slidably mounted on the side wall of the pier mounting plate (7), and a testing mechanism (11) is mounted on the side wall of the base (1); The impact mechanism (10) comprises a slider (14), a lifting frame (16) is mounted on the slider (14), and a turntable (18) is rotatably mounted on the lifting frame (16), a fixing plate (23) is fixedly mounted on the turntable (18), and a slide plate (24) is slidably mounted on the turntable (18), a slide rod (25) is mounted on both the fixing plate (23) and the slide plate (24), and a guide rod (26) is telescopically mounted on the end of the slide rod (25), a mounting oblique arm (31) parallel to the slide rod (25) is mounted on the turntable (18), a translation seat (34) is slidably mounted on the mounting oblique arm (31), and the translation seat (34) is connected to an impact ball (38) on the slide rod (25) via a connecting wire (37); The testing mechanism (11) comprises an ultrasonic testing probe (58) for internal flaw detection of a two-span four-lane bridge model.

2. A four-way vehicle track impact force testing device according to claim 1, characterized in that: A slide rail (2) is arranged on the top side of the base (1), and the slide seat (3) moves along the slide rail (2); a bolt is threadedly mounted on the slide seat (3), and the bottom end of the bolt is in contact with the slide rail (2); A first pneumatic cylinder (6) is installed at the center of the top side of the base (1), and the telescopic end of the first pneumatic cylinder (6) is connected to the pier mounting plate (7), guide rods (8) are installed around the bottom side of the pier mounting plate (7), and guide sleeves (9) that are slidably mounted on the guide rods (8) are installed around the top side of the base (1).

3. A four-way vehicle track impact force testing device according to claim 2, characterized in that: A first motor (12) is mounted on the end of the pier mounting plate (7), and a first threaded rod (13) threadably connected to a slider (14) is mounted on the output end of the first motor (12).

4. A four-way vehicle track impact force testing device according to claim 3, characterized in that: A second pneumatic cylinder (15) is installed on the bottom side of the sliding block (14), and a telescopic end of the second pneumatic cylinder (15) is connected to a lifting frame (16); A second motor (17) is installed in the lifting frame (16), and an output end of the second motor (17) is connected to the turntable (18).

5. A four-way vehicle track impact force testing device according to claim 4, characterized in that: The turntable (18) is symmetrically mounted with first shaft seats (19), and a bidirectional threaded rod (21) and a slide rod (22) penetrating a fixed plate (23) and a slide plate (24) are mounted between the two first shaft seats (19), and the bidirectional threaded rod (21) and the slide plate (24) are threadedly connected, and a third motor (20) is mounted on one of the first shaft seats (19), and the third motor (20) is connected to the bidirectional threaded rod (21).

6. A four-way vehicle track impact force testing device according to claim 5, characterized in that: A rod groove (27) is formed in the slide rod (25), a second threaded rod (29) and a support rod (30) are installed in the rod groove (27), the guide rod (26) is threadedly connected to the second threaded rod (29), and the guide rod (26) is slidably connected to the support rod (30), a motor (28) is installed on the slide rod (25), and an output end of the motor (28) is connected to the second threaded rod (29).

7. A four-way vehicle track impact force testing device according to claim 6, characterized in that: A fourth motor (33) is installed at the top end of the installation oblique arm (31), and a third threaded rod (32) threadably connected to the translation seat (34) is installed at the output end of the fourth motor (33).

8. A four-way vehicle track impact force testing device according to claim 7, characterized in that: The translation seat (34) is provided with a receiving groove (35), a fifth motor (39) is installed at the end of the translation seat (34), and a wire roller (36) is installed at the output end of the fifth motor (39) located in the receiving groove (35), a connecting wire (37) is wound on the wire roller (36), and second shaft seats (40) are symmetrically installed on the translation seat (34), a sixth motor (41) is installed on one of the second shaft seats (40), and the output end of the sixth motor (41) is connected to the T-shaped barrier arm (42).

9. A four-way vehicle track impact force testing device according to claim 8, characterized in that: The testing mechanism (11) further comprises an electric slide rail (43), an electric slider (44) being slidably mounted on the electric slide rail (43), a vertical frame (45) being vertically mounted on the electric slider (44), a seventh motor (47) being mounted on the top of the vertical frame (45), and a fourth threaded rod (46) being mounted on the output end of the seventh motor (47), the fourth threaded rod (46) being threadedly connected to a horizontally arranged lifting frame (48), an eighth motor (49) being mounted on the end of the lifting frame (48), the output end of the eighth motor (49) being connected to a fifth threaded rod (50), the fifth threaded rod (50) being threadedly connected to a translation frame (51), a ninth motor (52) being mounted on the end of the translation frame (51), a sixth threaded rod (53) being mounted on the output end of the ninth motor (52), and the sixth threaded rod (53) being threadedly connected to a detection movable seat (54).

10. A four-way vehicle track impact force testing device according to claim 9, characterized in that: A bottom groove (55) is formed at the bottom end of the detection movable seat (54); a tenth motor (56) is mounted on the side wall of the detection movable seat (54); a rotating shaft (57) is mounted on the output end of the tenth motor (56); and an ultrasonic detection probe (58) is mounted on the rotating shaft (57).

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