Ultrasonic flaw detector for hollow axle

Abstract

The invention discloses an ultrasonic flaw detector for a hollow axle. The ultrasonic flaw detector comprises a frame, an axle detection mechanism and a cantilever mechanism, the cantilever mechanism comprises an adjusting assembly, the adjusting assembly comprises a first sleeve, a second sleeve, a third sleeve, a spring, an adjusting rod and a hanging block, the second sleeve is arranged in the first sleeve, the third sleeve is arranged in the second sleeve, the spring is located in the third sleeve, the adjusting rod is partially arranged in the third sleeve, and the spring is arranged on the adjusting rod in a sleeving mode. The lower end of the adjusting rod extends out of the third sleeve and is connected with a hanging block, and the hanging block is connected with an axle detection mechanism. And by arranging the three sleeves, the adjusting stroke is increased, so that the applicable height range of the ultrasonic flaw detector for the hollow axle is wider. By pushing the adjusting rod, the second sleeve and the third sleeve stretch out and draw back synchronously along with movement of the adjusting rod, so that fine adjustment of the vertical height of the axle detection mechanism is achieved, more detection requirements can be met, and the detection efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic flaw detection, in particular to an ultrasonic flaw detector for a hollow axle. Background Art

[0002] The hollow axle of the EMU is one of the important components of the bogie wheelset, which directly affects the safety of the EMU operation. Therefore, it is necessary to inspect the hollow axle to prevent damage or deformation inside the hollow axle and ensure the safety of the EMU operation. The existing ultrasonic flaw detectors for hollow axles of EMUs usually use a moving mechanism to move the detection mechanism to a suitable position, and then the detection mechanism performs flaw detection on the hollow axle. However, the moving mechanism in the existing ultrasonic flaw detector generally uses a mechanical arm or a mechanical lever structure to realize the movement of the detection mechanism, and the position of the probe rod cannot be fine-tuned; some ultrasonic flaw detectors that can fine-tune the position of the detection mechanism have insufficient adjustment stroke and cannot meet the detection needs of the detection mechanism, resulting in reduced flaw detection efficiency. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a hollow axle ultrasonic flaw detector to solve the problem that the existing hollow axle ultrasonic flaw detector has insufficient adjustment stroke of the detection mechanism, cannot meet the detection requirements of the detection mechanism, and has low flaw detection efficiency.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is to provide a hollow axle ultrasonic flaw detector, comprising:

[0005] frame;

[0006] An axle detection mechanism, which is arranged on one side of the frame and is used to detect the hollow axle;

[0007] A cantilever mechanism, the cantilever mechanism acts on the axle detection mechanism and is used to adjust the position of the axle detection mechanism. The cantilever mechanism includes a lifting assembly, a rotating assembly, a swing assembly and an adjusting assembly. The bottom end of the lifting assembly is fixedly connected to the frame, the height of the lifting assembly is greater than the height of the frame, the top end of the lifting assembly is connected to the rotating assembly, and the lifting assembly can adjust the vertical height of the rotating assembly;

[0008] The rotating assembly can rotate relative to the lifting assembly, the head end of the swing assembly is connected to the rotating assembly, the swing assembly can swing circumferentially relative to the rotating assembly, and the tail end of the swing assembly is connected to the adjusting assembly;

[0009] The adjusting assembly includes a first sleeve, a second sleeve, a third sleeve, a spring, an adjusting rod and a hanging block. The second sleeve is arranged inside the first sleeve, and the second sleeve can move vertically relative to the first sleeve. The third sleeve is arranged inside the second sleeve, and the third sleeve can move vertically relative to the second sleeve. The spring is located inside the third sleeve. The adjusting rod part is arranged inside the third sleeve. The spring is sleeved on the adjusting rod. The adjusting rod can move vertically relative to the third sleeve and squeeze the spring. The lower end of the adjusting rod extends from the third sleeve and is connected to the hanging block. The hanging block is connected to the axle detection mechanism.

[0010] In some embodiments, a first limiting protrusion is circumferentially provided on the outer side of the third sleeve, and the first limiting protrusion is located at the upper end of the third sleeve; a second limiting protrusion is circumferentially provided on the inner side of the second sleeve, and the second limiting protrusion is close to the lower end of the second sleeve; during the downward movement of the third sleeve relative to the second sleeve, the first limiting protrusion stops at the second limiting protrusion and limits the movement of the third sleeve; a third limiting protrusion is circumferentially provided on the outer side of the second sleeve, and the third limiting protrusion is located at the upper end of the second sleeve; a fourth limiting protrusion is circumferentially provided on the inner side of the first sleeve, and the fourth limiting protrusion is close to the lower end of the first sleeve; during the downward movement of the second sleeve relative to the first sleeve, the third limiting protrusion stops at the fourth limiting protrusion and limits the movement of the second sleeve.

[0011] In some embodiments, a first extension protrusion is circumferentially arranged on the upper end of the first limiting protrusion, a first friction ring is arranged on the outer sleeve of the first limiting protrusion, and the outer surface of the first friction ring is flush with the outer surface of the first extension protrusion; a second extension protrusion is circumferentially arranged on the upper end of the third limiting protrusion, a second friction ring is arranged on the outer sleeve of the third limiting protrusion, and the outer surface of the second friction ring is flush with the outer surface of the second extension protrusion.

[0012] In some embodiments, a first gasket is provided at the lower end of the first sleeve, and the first gasket includes a first connecting portion and a first extending portion. The first connecting portion is connected to the lower end of the first sleeve, the lower end of the first extending portion is connected to the first connecting portion, the upper end of the first extending portion abuts against the fourth limiting protrusion, the width of the first extending portion is greater than the fourth limiting protrusion, and the first extending portion is located between the first sleeve and the second sleeve; a second gasket is provided at the lower end of the second sleeve, and the second gasket includes a second connecting portion and a second extending portion. The second connecting portion is connected to the lower end of the second sleeve, the lower end of the second extending portion is connected to the second connecting portion, the upper end of the second extending portion abuts against the second limiting protrusion, the width of the second extending portion is greater than the second limiting protrusion, and the second extending portion is located between the second sleeve and the third sleeve.

[0013] In some embodiments, the adjusting rod includes a top cap portion and a rod body portion, the top cap portion is connected to the upper end of the spring, a third friction ring is arranged on the periphery of the top cap portion, the third friction ring can slide relative to the inner surface of the third sleeve, the rod body portion is connected to the lower end of the top cap portion, and the lower end of the rod body portion extends from the lower end of the third sleeve.

[0014] In some embodiments, the rotating assembly includes a bearing seat, a fixed shaft, a first bearing, a second bearing, a rotating seat, a rotating locking handle and a rotating arm. The bearing seat is arranged at the upper end of the lifting assembly, the fixed shaft is connected to the bearing seat, and the fixed shaft is provided with a rotating locking hole along the circumferential direction. The first bearing is sleeved at the lower end of the fixed shaft, and the second bearing is sleeved at the upper end of the fixed shaft. The first bearing and the second bearing can rotate relative to the fixed shaft. The rotating seat is sleeved around the periphery of the first bearing and the second bearing. A first through hole is provided on the side wall of the rotating seat. The rotating locking handle is connected to the rotating seat. The front end of the rotating locking handle has a rotating locking pin. The rotating locking pin can extend into the rotating seat through the first through hole and be inserted into the rotating locking hole to limit the rotation of the rotating seat. The rotating seat is also connected to the rotating arm.

[0015] In some embodiments, the rotating assembly also includes an articulated seat and an articulated shaft. The articulated seat is located at one end of the rotating assembly away from the lifting assembly. A second through hole is provided on the articulated seat, and the articulated shaft is provided on the articulated seat; the swinging assembly includes a swinging connecting seat, a swinging arm and a swing locking handle. The swinging connecting seat is rotatably connected to the articulated shaft. A plurality of swing locking holes are circumferentially provided at the bottom of the swinging connecting seat. A swing locking pin is provided at one end of the swing locking handle. The swing locking handle is connected to the articulated seat. The swing locking pin can be extended into the articulated seat through the second through hole and inserted into the swing locking hole to limit the swinging of the swinging connecting seat.

[0016] In some embodiments, the lifting assembly includes a mounting seat, a fixed column, a lifting column, a ball screw, a drive motor, a first pulley, a second pulley and a synchronous belt. The drive motor and the fixed column are arranged on the mounting seat, the lifting column is arranged in the fixed column and can slide vertically relative to the fixed column, the ball screw is threadedly installed inside the lifting column, the first pulley, the second pulley and the synchronous belt are arranged in the mounting seat, the drive motor is connected to the first pulley, the first pulley is connected to the second pulley through a synchronous belt, and the second pulley is connected to the ball screw.

[0017] In some embodiments, the hollow axle ultrasonic flaw detector also includes a wire taking-up assembly, a socket box, a power supply line and a power plug. The wire taking-up assembly is arranged in a frame, and the wire taking-up assembly includes a wire taking-up mounting frame, a wire taking-up drum and a wire taking-up drive. The wire taking-up drum is installed on the wire taking-up mounting frame and can rotate relative to the wire taking-up mounting frame. The wire taking-up drive is arranged inside the wire taking-up drum, and the wire taking-up drive is used to drive the wire taking-up drum to rotate; the socket box is arranged on one side of the frame, the socket box is adjacent to the wire taking-up drum, the tail end of the power supply line is wound around the wire taking-up drum, an opening is arranged on the socket box, the head end of the power supply line extends from the opening and is connected to the power plug, and the power plug is located in the socket box.

[0018] In some embodiments, a cable limit frame is also provided on the wire taking-up mounting frame, and the cable limit frame is located on a side of the wire taking-up mounting frame adjacent to the socket box. A limit hole is provided on the cable limit frame, and the head end of the power supply line extends from the limit hole. A limit ball is provided on the power supply line, and the limit ball is close to the head end of the power supply line. The limit hole is used to prevent the limit ball from passing through so as to limit the power supply line.

[0019] The beneficial effects of the present invention are as follows: in the present invention, the second sleeve is arranged inside the first sleeve, the second sleeve can move vertically relative to the first sleeve, the third sleeve is arranged inside the second sleeve, the third sleeve can move vertically relative to the second sleeve, the spring is located inside the third sleeve, the adjusting rod part is arranged inside the third sleeve, the spring is sleeved on the adjusting rod, the adjusting rod can move vertically relative to the third sleeve and squeeze the spring, the lower end of the adjusting rod extends from the third sleeve and is connected to the hanging block, and the hanging block is connected to the axle detection mechanism. By arranging the first sleeve, the second sleeve and the third sleeve, the adjustment stroke is increased, so that the height range applicable to the hollow axle ultrasonic flaw detector is wider. By pushing the adjusting rod, the second sleeve and the third sleeve are synchronously extended and retracted with the movement of the adjusting rod, thereby realizing fine adjustment of the vertical height of the axle detection mechanism, the adjustment stroke is large, more detection requirements can be met, and the detection efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0021] Figure 2 is a structural schematic diagram of another perspective of an embodiment of the present invention;

[0022] Figure 3 It is a structural schematic diagram of a cantilever mechanism according to an embodiment of the present invention;

[0023] Figure 4 is a schematic structural diagram of a rotating assembly according to an embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram of the exploded structure of a rotating assembly according to an embodiment of the present invention;

[0025] Figure 6 It is a schematic structural diagram of a swing assembly according to an embodiment of the present invention;

[0026] Figure 7 It is a structural schematic diagram of a lifting assembly according to an embodiment of the present invention;

[0027] Figure 8 It is a schematic diagram of the exploded structure of the regulating assembly according to one embodiment of the present invention;

[0028] Fig. 9 is a schematic cross-sectional structural diagram of an adjustment component according to an embodiment of the present invention;

[0029] Fig.10 yes Fig. 9 The enlarged view of point A in the middle;

[0030] Fig.11 It is a structural schematic diagram of a wire take-up assembly according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the present invention are provided in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0032] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0033] Figure 1-Figure 11 An embodiment of the hollow axle ultrasonic flaw detector of the present invention is shown, comprising:

[0034] A frame 1, an axle detection mechanism 2 and a cantilever mechanism 3. The axle detection mechanism 2 is arranged on one side of the frame 1. The axle detection mechanism 2 is used to detect the hollow axle. There are many types of axle detection mechanisms 2. According to the different detection principles of the axle detection mechanism 2, it can be divided into ultrasonic detection, X-ray detection or electromagnetic eddy current detection, etc. Ultrasonic detection is adopted in this embodiment. Ultrasonic detection uses the principle of reflection or diffraction formed after ultrasonic waves encounter defects to determine whether the axle has defects. The cantilever mechanism 3 acts on the axle detection mechanism 2. The cantilever mechanism 3 can move the axle detection mechanism 2 to a suitable position, so that the axle detection mechanism 2 is docked with the hollow axle to be detected, and then the axle detection mechanism 2 detects the hollow axle to promptly discover the defects of the hollow axle.

[0035] Specifically, in Figure 3 In the embodiment, the cantilever mechanism 3 includes a lifting assembly 31, a rotating assembly 32, a swinging assembly 33 and an adjusting assembly 34. The bottom end of the lifting assembly 31 is fixedly connected to the frame 1. The height of the lifting assembly 31 is greater than the height of the frame 1. The lifting assembly 31 is connected to the rotating assembly 32. The lifting assembly 31 can adjust the vertical height of the rotating assembly 32.

[0036] Combination Figure 3 and Figure 6 The rotating assembly 32 can rotate relative to the lifting assembly 31, the head end 331 of the swing assembly is connected to the rotating assembly 32, the swing assembly 33 can swing circumferentially relative to the rotating assembly 32, and the tail end 332 of the swing assembly is connected to the adjusting assembly 34;

[0037] Combination Figure 3 as well as Figure 8-Figure 10 As shown, the adjustment assembly 34 includes a first sleeve 341, a second sleeve 342, a third sleeve 343, a spring 344, an adjustment rod 345 and a hanger block 346. The second sleeve 342 is arranged inside the first sleeve 341, and the second sleeve 342 can move vertically relative to the first sleeve 341. The third sleeve 343 is arranged inside the second sleeve 342, and the third sleeve 343 can move vertically relative to the second sleeve 342. The spring 344 is located inside the third sleeve 343. The adjustment rod 345 is partially arranged inside the third sleeve 343. The spring 344 is sleeved on the adjustment rod 345. The adjustment rod 345 can move vertically relative to the third sleeve 343 and squeeze the spring 344. The lower end of the adjustment rod 345 extends from the third sleeve 343 and is connected to the hanger block 346. The hanger block 346 is connected to the axle detection mechanism 2.

[0038] In the present invention, the second sleeve 342 is arranged inside the first sleeve 341, and the second sleeve 342 can move vertically relative to the first sleeve 341. The third sleeve 343 is arranged inside the second sleeve 342, and the third sleeve 343 can move vertically relative to the second sleeve 342. The spring 344 is located inside the third sleeve 343. The adjustment rod 345 is partially arranged inside the third sleeve 343, and the spring 344 is sleeved on the adjustment rod 345. The adjustment rod 345 can move vertically relative to the third sleeve 343 and compress the spring 344. The lower end of the adjustment rod 345 extends from the third sleeve 343 and is connected to the hanging block 346. The hanging block 346 is connected to the axle detection mechanism 2. By arranging the first sleeve 341, the second sleeve 342 and the third sleeve 343, the adjustment stroke is increased, so that the height range applicable to the hollow axle ultrasonic flaw detector is wider. By pushing the adjusting rod 345 , the second sleeve 342 and the third sleeve 343 are synchronously extended and retracted as the adjusting rod 345 moves, thereby achieving fine adjustment of the vertical height of the axle detection mechanism 2 , which can meet more detection requirements and has high detection efficiency.

[0039] In some embodiments, Figure 1 , Figure 3 and Fig. 9 As shown, the upper end of the axle detection mechanism 2 has a suspension rod 21, and the suspension rod 21 is connected to the suspension block 346. The vertical height adjustment of the axle detection mechanism 2 is mainly divided into two steps. First, the vertical height of the axle detection mechanism 2 is preliminarily adjusted by the lifting component 31 of the cantilever mechanism 3. When the cantilever mechanism 3 lifts the axle detection mechanism 2, the adjustment component 34 is extended to the maximum stroke due to the influence of the self-weight of the axle detection mechanism 2. At this time, combined with the specific position of the hollow axle, the suspension rod 21 is pulled upward, and the upward force is transmitted to the adjustment rod 345 through the suspension block 346. The adjustment rod 345 moves, and the second sleeve 342 and the third sleeve 343 are synchronously extended and retracted with the movement of the adjustment rod 345, so as to achieve fine adjustment of the vertical height of the axle detection mechanism 2.

[0040] In some embodiments, in combination Figure 8-Figure 10 As shown, in Fig.10 In the embodiment, the outer side of the third sleeve 343 is provided with a first limiting protrusion 3431 along the circumferential direction, and the first limiting protrusion 3431 is located at the upper end of the third sleeve 343. Fig. 9 In the embodiment, a second limiting protrusion 3421 is circumferentially arranged on the inner side of the second sleeve 342, and the second limiting protrusion 3421 is close to the lower end of the second sleeve 342. When the third sleeve 343 moves downward relative to the second sleeve 342, the first limiting protrusion 3431 stops at the second limiting protrusion 3421 and limits the movement of the third sleeve 343. Fig.10In the embodiment, a third limiting protrusion 3422 is circumferentially arranged on the outer side of the second sleeve 342, and the third limiting protrusion 3422 is located at the upper end of the second sleeve 342. Fig. 9 In the figure, a fourth limiting protrusion 3411 is circumferentially arranged on the inner side of the first sleeve 341, and the fourth limiting protrusion 3411 is close to the lower end of the first sleeve 341. When the second sleeve 342 moves downward relative to the first sleeve 341, the third limiting protrusion 3422 stops at the fourth limiting protrusion 3411 and limits the movement of the second sleeve 342. When the adjusting rod 345 is subjected to an external force and moves vertically downward relative to the third sleeve 343, the adjusting rod 345 presses the spring 344 downward, the lower end of the spring 344 contacts the third sleeve 343, and the force is transmitted to the third sleeve 343, and the third sleeve 343 begins to move vertically relative to the second sleeve 342. After the first limiting protrusion 3431 stops at the second limiting protrusion 3421, the second sleeve 342 begins to move vertically relative to the first sleeve 341 until the third limiting protrusion 3422 stops at the fourth limiting protrusion 3411, and the adjusting assembly 34 is extended to the maximum stroke. Through the cooperation of the first limiting protrusion 3431 and the second limiting protrusion 3421 and the cooperation of the third limiting protrusion 3422 and the fourth limiting protrusion 3411, the third sleeve 343 and the second sleeve 342 are limited, and the reliability and stability of the telescopic process are improved.

[0041] In some embodiments, in combination Figure 8-Figure 10 As shown, in Fig.10 In the embodiment, the upper end of the first limiting protrusion 3431 is provided with a first extension protrusion 3432 along the circumferential direction, and the outer periphery of the first limiting protrusion 3431 is provided with a first friction ring 347, and the outer surface of the first friction ring 347 is flush with the outer surface of the first extension protrusion 3432; the upper end of the third limiting protrusion 3422 is provided with a second extension protrusion 3423 along the circumferential direction, and the outer periphery of the third limiting protrusion 3422 is provided with a second friction ring 348, and the outer surface of the second friction ring 348 is flush with the outer surface of the second extension protrusion 3423. When the third sleeve 343 moves vertically relative to the second sleeve 342, the first friction ring 347 contacts the inner surface of the second sleeve 342 and slides along the inner surface of the second sleeve 342. The first friction ring 347 can provide greater friction, so that the process of the third sleeve 343 moving vertically relative to the second sleeve 342 is smoother. The second friction ring 348 has the same function as the first friction ring 347 , which will not be described in detail here.

[0042] In some embodiments, in combination Figure 8 and Fig. 9As shown, a first gasket 349 is disposed at the lower end of the first sleeve 341, and the first gasket 349 includes a first connecting portion 3491 and a first extending portion 3492. The first connecting portion 3491 is connected to the lower end of the first sleeve 341, and the lower end of the first extending portion 3492 is connected to the first connecting portion 3491. The upper end of the first extending portion 3492 abuts against the fourth limiting protrusion 3411. The width of the first extending portion 3492 is greater than the fourth limiting protrusion 3411, and the first extending portion 3492 is located between the first sleeve 341 and the second sleeve 342.

[0043] exist Fig. 9 In the embodiment, the second sleeve 342 is provided with a second gasket 340 at the lower end thereof, and the second gasket 340 includes a second connection portion 3401 and a second extension portion 3402. The second connection portion 3401 is connected to the lower end of the second sleeve 342, the lower end of the second extension portion 3402 is connected to the second connection portion 3401, the upper end of the second extension portion 3402 abuts against the second limiting protrusion 3421, the width of the second extension portion 3402 is greater than the second limiting protrusion 3421, and the second extension portion 3402 is located between the second sleeve 342 and the third sleeve 343. When the second sleeve 342 moves vertically relative to the first sleeve 341, since the width of the first extension portion 3492 is greater than the fourth limiting protrusion 3411, the outer surface of the second sleeve 342 contacts the first extension portion 3492, and does not collide with the fourth limiting protrusion 3411 during the movement, and the entire vertical movement process is more stable. The second gasket 340 has the same function as the first gasket 349 and is not described again here.

[0044] In some embodiments, in combination Fig. 9 As shown, the adjustment rod 345 includes a top cap portion 3451 and a rod body portion 3452, the top cap portion 3451 is connected to the upper end of the spring 344, a third friction ring 350 is arranged on the periphery of the top cap portion 3451, the third friction ring 350 can slide relative to the inner surface of the third sleeve 343, the rod body portion 3452 is connected to the lower end of the top cap portion 3451, and the lower end of the rod body portion 3452 extends from the lower end of the third sleeve 343. By sleeve-arranging the third friction ring 350 on the periphery of the top cap portion 3451, when the adjustment rod 345 moves vertically relative to the third sleeve 343, the third friction ring 350 contacts the inner surface of the third sleeve 343, the sliding friction force is greater, and the vertical movement process is more stable.

[0045] In some embodiments, Figure 3-Figure 5 As shown, in Figure 5In the embodiment, the rotating assembly 32 includes a bearing seat 321, a fixed shaft 322, a first bearing 323, a second bearing 324, a rotating seat 325, a rotating locking handle 326 and a rotating arm 327. The bearing seat 321 is arranged at the upper end of the lifting assembly 31, the fixed shaft 322 is connected to the bearing seat 321, and the fixed shaft 322 is provided with a plurality of rotating locking holes 3221 along the circumferential direction. The first bearing 323 is sleeved on the lower end of the fixed shaft 322, and the second bearing 324 is sleeved on the upper end of the fixed shaft 322. The first bearing 323 and the second bearing 324 are sleeved on the upper end of the fixed shaft 322. The rotating seat 325 can rotate relative to the fixed shaft 322, and the rotating seat 325 is sleeved on the periphery of the first bearing 323 and the second bearing 324. The side wall of the rotating seat 325 is provided with a first through hole 3251. The rotating locking handle 326 is connected to the rotating seat 325. The front end of the rotating locking handle 326 has a rotating locking pin 3261. The rotating locking pin 3261 can extend into the rotating seat 325 through the first through hole 3251 and be inserted into the rotating locking hole 3221 to limit the rotation of the rotating seat 325. The rotating seat 325 is also connected to the rotating arm 327. The rotating locking handle 326 can insert the rotating locking pin 3261 into the rotating locking hole 3221 by pushing, or can extend the rotating locking pin 3261 and insert it into the rotating locking hole 3221 by rotating. When the axle detection mechanism 2 is rotated to a suitable position, the rotation locking pin 3261 at the front end of the rotation locking handle 326 is extended into the rotation seat 325 through the first through hole 3251 and inserted into the rotation locking hole 3221, thereby locking the rotation seat 325 and the fixed shaft 322, limiting the rotation of the rotation seat 325, preventing shaking when the axle detection mechanism 2 is subsequently moved, reducing the risk of collision, and making the moving process safer.

[0046] In some embodiments, Figure 3-Figure 5 As shown, a retaining ring 328 and a washer 329 are provided at the top of the rotating seat 325. The retaining ring 328 is provided at the upper end of the fixed shaft 322. The retaining ring 328 is fixedly connected to the fixed shaft 322, and the washer 329 is located between the second bearing 324 and the retaining ring 328. By providing the retaining ring 328 and the washer 329, the retaining ring 328 is connected to the fixed shaft 322, and the retaining ring 328 fixes and positions the end of the fixed shaft 322 through its own elastic deformation and the friction force with the end of the fixed shaft 322, and the washer 329 is located between the second bearing 324 and the retaining ring 328. The washer 329 fills the gap between the second bearing 324 and the retaining ring 328, and plays a buffering and shock-absorbing role when the second bearing 324 is subjected to vibration and impact.

[0047] In some embodiments, Figure 3-Figure 6 As shown, in Figure 4In the embodiment, the rotating assembly 32 also includes an articulated seat 320 and an articulated shaft 330. The articulated seat 320 is located at one end of the rotating assembly 32 away from the lifting assembly 31. The articulated seat 320 is provided with a second through hole 3201, and the articulated shaft 330 is provided on the articulated seat 320; the swinging assembly 33 includes a swinging connecting seat 333, a swinging arm 334 and a swing locking handle 335. The swinging connecting seat 333 is rotatably connected to the articulated shaft 330. The bottom of the swinging connecting seat 333 is circumferentially provided with a plurality of swing locking holes 3331. One end of the swing locking handle 335 has a swing locking pin 3351. The swing locking handle 335 is connected to the articulated seat 320. The swing locking pin 3351 can be extended into the articulated seat 320 through the second through hole 3201 and inserted into the swing locking hole 3331 to limit the swinging of the swinging connecting seat 333. When the swing connection seat 333 swings to a suitable position, the swing locking handle 335 is operated, and the swing locking pin 3351 extends into the hinge seat 320 through the second through hole 3201 and is inserted into the swing locking hole 3331, thereby locking the swing connection seat 333 and the hinge seat 320 to prevent the swing connection seat 333 from shaking, which is safer. The working principle of the swing locking handle 335 is the same as that of the rotation locking handle 326, which will not be repeated here.

[0048] In some embodiments, in combination Figure 3 and Figure 7 As shown, the lifting assembly 31 includes a mounting seat 311, a fixed column 312, a lifting column 313, a ball screw 314, a drive motor 315, a first pulley 316, a second pulley 317 and a synchronous belt 318. The drive motor 315 and the fixed column 312 are arranged on the mounting seat 311, the lifting column 313 is arranged in the fixed column 312, and can slide vertically relative to the fixed column 312, the ball screw 314 is threadedly installed inside the lifting column 313, the first pulley 316, the second pulley 317 and the synchronous belt 318 are arranged in the mounting seat 311, the drive motor 315 is connected to the first pulley 316, the first pulley 316 and the second pulley 317 are connected through the synchronous belt 318, and the second pulley 317 is connected to the ball screw 314. The first pulley 316 is driven to rotate by the driving motor 315. The first pulley 316 and the second pulley 317 are connected by the synchronous belt 318. The second pulley 317 also rotates synchronously. After the second pulley 317 rotates, it drives the ball screw 314 to rotate. The rotation of the ball screw 314 drives the lifting column 313 to slide vertically relative to the fixed column 312. The lifting column 313 is connected to the bearing seat 321, driving the bearing seat 321 to rise or fall.

[0049] In some embodiments, in combination Figure 2 and Fig.11As shown, the hollow axle ultrasonic flaw detector also includes a wire take-up assembly 4, a socket box 5, a power supply line 6 and a power plug 7. The wire take-up assembly 4 is arranged in the frame 1. The wire take-up assembly 4 includes a wire take-up mounting frame 41, a wire take-up drum 42 and a wire take-up drive (not shown in the figure). The wire take-up drum 42 is mounted on the wire take-up mounting frame 41 and can rotate relative to the wire take-up mounting frame 41. The wire take-up drive is arranged inside the wire take-up drum 42. The wire take-up drive can be a motor or a winding spring, etc. The wire take-up drive is used to drive the wire take-up drum 42 to rotate; the socket box 5 is arranged on one side of the frame 1, the socket box 5 is adjacent to the wire take-up drum 42, the tail end of the power supply line 6 is wound around the wire take-up drum 42, the socket box 5 is provided with an opening 51, the head end of the power supply line 6 extends from the opening 51 and is connected to the power plug 7, and the power plug 7 is located in the socket box 5. When the flaw detector needs to be powered, the power plug 7 is taken out from the socket box 5, and the power line 6 is pulled out from the take-up drum 42 by pulling the power plug 7, and then the power plug 7 is connected to the external power supply. By winding the power line 6 on the take-up drum 42, not only can the long-distance transmission of electric energy be realized, the moving range of the ultrasonic flaw detector is increased, but also the power line 6 is not easy to be entangled or knotted, which is convenient to organize. When the flaw detector is powered off, the take-up drive part is activated to automatically retract the power line 6 and wind it onto the take-up drum 42, which is very convenient.

[0050] In some embodiments, in combination Figure 2 and Fig.11 As shown, the wire take-up mounting frame 41 is also provided with a cable limit frame 43, which is located on one side of the wire take-up mounting frame 41 adjacent to the socket box 5, and a limit hole 431 is provided on the cable limit frame 43, the head end of the power supply line 6 extends out from the limit hole 431, and a limit ball 44 is sleeved on the power supply line 6, the limit ball 44 is close to the head end of the power supply line 6, and the limit hole 431 is used to prevent the limit ball 44 from passing through, so as to limit the power supply line 6. When the wire take-up drive is activated, the wire take-up drum 42 rotates, and the power supply line 6 is rewound on the wire take-up drum 42, the limit hole 431 only allows the power supply line 6 to pass through, and the limit ball 44 cannot pass through the limit hole 431, and when the limit ball 44 stops at the cable limit frame 43, the power plug 7 just moves into the socket box 5, preventing the power plug 7 from colliding with the socket box 5 when the wire take-up drive is retracting the power supply line 6, thereby causing damage to the power plug 7.

[0051] It can be seen that the present invention discloses a hollow axle ultrasonic flaw detector, comprising a frame, an axle detection mechanism and a cantilever mechanism, the cantilever mechanism comprising a lifting assembly, a rotating assembly, a swinging assembly and an adjusting assembly, the bottom end of the lifting assembly is fixedly connected to the frame, the lifting assembly can adjust the vertical height of the rotating assembly, the rotating assembly can rotate relative to the lifting assembly, the head end of the swinging assembly is connected to the rotating assembly, the swinging assembly can swing circumferentially relative to the rotating assembly, and the tail end of the swinging assembly is connected to the adjusting assembly; the adjusting assembly comprises a first sleeve, a second sleeve, a third sleeve, a spring, an adjusting rod and a hanging block, by arranging the second sleeve inside the first sleeve, the second sleeve can be vertically moved relative to the first sleeve, the third sleeve is arranged inside the second sleeve, the third sleeve can be vertically moved relative to the second sleeve, the spring and the adjusting rod are arranged inside the third sleeve, the upper end of the adjusting rod is connected to the upper end of the spring, the adjusting rod can be vertically moved relative to the third sleeve, the lower end of the adjusting rod extends from the third sleeve and is connected to the hanging block, and the hanging block is connected to the axle detection mechanism. By setting the first sleeve, the second sleeve and the third sleeve, the adjustment stroke is increased, so that the height range applicable to the hollow axle ultrasonic flaw detector is wider. By pushing the adjustment rod, the second sleeve and the third sleeve are synchronously extended and retracted as the adjustment rod moves, thereby realizing fine adjustment of the vertical height of the axle detection mechanism. The adjustment stroke is large, which can meet more detection needs and has high detection efficiency.

[0052] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hollow axle ultrasonic flaw detector, characterized in that: include: frame; An axle detection mechanism, the axle detection mechanism is arranged on one side of the frame, and the axle detection mechanism is used to detect the hollow axle; A cantilever mechanism, the cantilever mechanism acts on the axle detection mechanism and is used to adjust the position of the axle detection mechanism, the cantilever mechanism includes a lifting assembly, a rotating assembly, a swing assembly and an adjusting assembly, the bottom end of the lifting assembly is fixedly connected to the frame, the height of the lifting assembly is greater than the height of the frame, the top end of the lifting assembly is connected to the rotating assembly, and the lifting assembly can adjust the vertical height of the rotating assembly; The rotating assembly can rotate relative to the lifting assembly, the head end of the swing assembly is connected to the rotating assembly, the swing assembly can swing circumferentially relative to the rotating assembly, and the tail end of the swing assembly is connected to the adjusting assembly; The adjusting assembly includes a first sleeve, a second sleeve, a third sleeve, a spring, an adjusting rod and a hanging block. The second sleeve is arranged inside the first sleeve, and the second sleeve can move vertically relative to the first sleeve. The third sleeve is arranged inside the second sleeve, and the third sleeve can move vertically relative to the second sleeve. The spring is located inside the third sleeve. The adjusting rod is partially arranged inside the third sleeve. The spring is sleeved on the adjusting rod. The adjusting rod can move vertically relative to the third sleeve and squeeze the spring. The lower end of the adjusting rod extends from the third sleeve and is connected to the hanging block. The hanging block is connected to the axle detection mechanism.

2. The hollow axle ultrasonic flaw detector according to claim 1, characterized in that: A first limiting protrusion is circumferentially arranged on the outer side of the third sleeve, and the first limiting protrusion is located at the upper end of the third sleeve; a second limiting protrusion is circumferentially arranged on the inner side of the second sleeve, and the second limiting protrusion is close to the lower end of the second sleeve; during the downward movement of the third sleeve relative to the second sleeve, the first limiting protrusion stops at the second limiting protrusion and limits the movement of the third sleeve; a third limiting protrusion is circumferentially arranged on the outer side of the second sleeve, and the third limiting protrusion is located at the upper end of the second sleeve; a fourth limiting protrusion is circumferentially arranged on the inner side of the first sleeve, and the fourth limiting protrusion is close to the lower end of the first sleeve; during the downward movement of the second sleeve relative to the first sleeve, the third limiting protrusion stops at the fourth limiting protrusion and limits the movement of the second sleeve.

3. The hollow axle ultrasonic flaw detector according to claim 2, characterized in that: A first extension protrusion is circumferentially arranged on the upper end of the first limiting protrusion, a first friction ring is arranged on the outer periphery of the first limiting protrusion, and the outer surface of the first friction ring is flush with the outer surface of the first extension protrusion; a second extension protrusion is circumferentially arranged on the upper end of the third limiting protrusion, a second friction ring is arranged on the outer periphery of the third limiting protrusion, and the outer surface of the second friction ring is flush with the outer surface of the second extension protrusion.

4. The hollow axle ultrasonic flaw detector according to claim 3 is characterized in that: A first gasket is provided at the lower end of the first sleeve, and the first gasket includes a first connecting portion and a first extending portion. The first connecting portion is connected to the lower end of the first sleeve, the lower end of the first extending portion is connected to the first connecting portion, the upper end of the first extending portion abuts against the fourth limiting protrusion, the width of the first extending portion is greater than the fourth limiting protrusion, and the first extending portion is located between the first sleeve and the second sleeve; a second gasket is provided at the lower end of the second sleeve, and the second gasket includes a second connecting portion and a second extending portion. The second connecting portion is connected to the lower end of the second sleeve, the lower end of the second extending portion is connected to the second connecting portion, the upper end of the second extending portion abuts against the second limiting protrusion, the width of the second extending portion is greater than the second limiting protrusion, and the second extending portion is located between the second sleeve and the third sleeve.

5. The hollow axle ultrasonic flaw detector according to claim 1, characterized in that: The adjusting rod includes a top cap portion and a rod body portion, the top cap portion is connected to the upper end of the spring, a third friction sliding ring is arranged on the periphery of the top cap portion, the third friction sliding ring can slide relative to the inner surface of the third sleeve, the rod body portion is connected to the lower end of the top cap portion, and the lower end of the rod body portion extends out from the lower end of the third sleeve.

6. The hollow axle ultrasonic flaw detector according to claim 1, characterized in that: The rotating assembly includes a bearing seat, a fixed shaft, a first bearing, a second bearing, a rotating seat, a rotating locking handle and a rotating arm. The bearing seat is arranged at the upper end of the lifting assembly, the fixed shaft is connected to the bearing seat, and the fixed shaft is provided with a rotating locking hole along the circumferential direction. The first bearing is sleeved at the lower end of the fixed shaft, and the second bearing is sleeved at the upper end of the fixed shaft. The first bearing and the second bearing can rotate relative to the fixed shaft. The rotating seat is sleeved on the periphery of the first bearing and the second bearing. A first through hole is provided on the side wall of the rotating seat. The rotating locking handle is connected to the rotating seat. The front end of the rotating locking handle has a rotating locking pin, and the rotating locking pin can extend into the rotating seat through the first through hole and be inserted into the rotating locking hole to limit the rotation of the rotating seat. The rotating seat is also connected to the rotating arm.

7. The hollow axle ultrasonic flaw detector according to claim 1, characterized in that: The rotating assembly also includes an articulated seat and an articulated shaft. The articulated seat is located at one end of the rotating assembly away from the lifting assembly. A second through hole is provided on the articulated seat, and the articulated shaft is provided on the articulated seat; the swinging assembly includes a swinging connecting seat, a swinging arm and a swing locking handle. The swinging connecting seat is rotatably connected to the articulated shaft. A plurality of swing locking holes are circumferentially provided at the bottom of the swinging connecting seat. A swing locking pin is provided at one end of the swing locking handle. The swing locking handle is connected to the articulated seat. The swing locking pin can be extended into the articulated seat through the second through hole and inserted into the swing locking hole to limit the swinging of the swing connecting seat.

8. The hollow axle ultrasonic flaw detector according to claim 1, characterized in that: The lifting assembly includes a mounting seat, a fixed column, a lifting column, a ball screw, a driving motor, a first pulley, a second pulley and a synchronous belt. The driving motor and the fixed column are arranged on the mounting seat, the lifting column is arranged in the fixed column and can slide vertically relative to the fixed column, the ball screw is threadedly installed inside the lifting column, the first pulley, the second pulley and the synchronous belt are arranged in the mounting seat, the driving motor is connected to the first pulley, the first pulley and the second pulley are connected through the synchronous belt, and the second pulley is connected to the ball screw.

9. The hollow axle ultrasonic flaw detector according to claim 1, characterized in that: The hollow axle ultrasonic flaw detector also includes a wire take-up assembly, a socket box, a power supply line and a power supply plug. The wire take-up assembly is arranged in the frame. The wire take-up assembly includes a wire take-up mounting frame, a wire take-up drum and a wire take-up drive. The wire take-up drum is installed on the wire take-up mounting frame and can rotate relative to the wire take-up mounting frame. The wire take-up drive is arranged inside the wire take-up drum, and the wire take-up drive is used to drive the wire take-up drum to rotate; the socket box is arranged on one side of the frame, the socket box is adjacent to the wire take-up drum, the tail end of the power supply line is wound around the wire take-up drum, the socket box is provided with an opening, the head end of the power supply line extends from the opening and is connected to the power supply plug, and the power supply plug is located in the socket box.

10. The hollow axle ultrasonic flaw detector according to claim 9, characterized in that: A cable limiting frame is also provided on the wire taking-up mounting frame, and the cable limiting frame is located on a side of the wire taking-up mounting frame adjacent to the socket box. A limiting hole is provided on the cable limiting frame, and the head end of the power supply line extends out of the limiting hole. A limiting ball is sleeved on the power supply line, and the limiting ball is close to the head end of the power supply line. The limiting hole is used to prevent the limiting ball from passing through so as to limit the power supply line.

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