An internal thread anomaly detection device

Abstract

The utility model discloses a kind of internal thread abnormality detection devices, comprising: product positioning assembly includes first linear drive module, product positioning fixture;Detection positioning assembly includes second linear drive module, third linear drive module and positioning module;Thread detection rod is connected in positioning module, thread detection rod is equipped with horizontal passage, one end of horizontal passage is connected with let hole, the top of horizontal passage is connected with vertical passage, the top of vertical passage is equipped with limit cavity, slidingly connected with translation block in horizontal passage, translation block is equipped with the spherical surface probe head of being threaded in let hole, the other end of translation block is equipped with first inclined plane, slidingly connected with lifting column in vertical passage, the bottom of lifting column is equipped with second inclined plane, the top of lifting column is equipped with the limiting sheet in limit cavity, stress sensing sheet and elastic piece are equipped in limit cavity.The utility model detection result is comprehensive and reliable, can reduce collision damage, detection efficiency is high, and universality is high.

Description

Technical Field

[0001] This utility model relates to the field of thread detection, and in particular to a device for detecting abnormal internal threads. Background Technology

[0002] During the processing and manufacturing of metal products, drilling, cutting, tapping and other operations are often required to give the metal products the corresponding mechanical structure. Threaded holes are one of them. The processing quality of threaded holes directly affects the assembly accuracy and performance of the product.

[0003] Traditional techniques mainly rely on manual visual inspection, which is highly subjective and unreliable. Some techniques use go gauges and no-go gauges to inspect the internal threads of the screw holes separately, which requires step-by-step inspection. Tightening the go gauges and no-go gauges is time-consuming and inefficient. The rigid contact during the tightening process can easily cause jamming, which can damage the internal thread structure and create secondary defects, resulting in low reliability of the inspection effect. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an internal thread anomaly detection device, which has high detection efficiency, flexible and adaptive detection action, and objective and reliable detection results.

[0005] An internal thread abnormality detection device according to an embodiment of the present invention includes:

[0006] The product positioning component includes a first linear drive module and a product positioning fixture connected to the first linear drive module;

[0007] The detection and positioning component includes a second linear drive module, a third linear drive module, and a positioning module. The positioning module is connected to the third linear drive module, and the third linear drive module is connected to the second linear drive module.

[0008] A threaded probe is connected to a positioning module. The threaded probe has a horizontal channel, one end of which is connected to a clearance hole. A vertical channel is connected to the top of the horizontal channel, and a limiting cavity is provided at the top of the vertical channel. A translation block is slidably connected in the horizontal channel. One end of the translation block has a spherical probe head that passes through the clearance hole, and the other end of the translation block has a first inclined surface. A lifting column is slidably connected in the vertical channel. The bottom end of the lifting column has a second inclined surface that abuts against the first inclined surface. The top end of the lifting column has a limiting plate located in the limiting cavity. The limiting cavity has a stress-sensing plate and an elastic element. The two ends of the elastic element are respectively connected to the stress-sensing plate and the limiting plate, so that the limiting plate tends to move away from the stress-sensing plate.

[0009] In this embodiment, the detection module consists of a horizontal channel, a clearance hole, a vertical channel, a limiting cavity, a translation block, a spherical probe, a lifting column, a limiting piece, an elastic element, and a stress sensing piece. The detection module has four sets and is evenly distributed around the axis of the threaded probe rod.

[0010] In this embodiment, the horizontal channel, vertical channel, translation block, and lifting column are all in the shape of quadrangular prisms.

[0011] In this embodiment, the thread detection rod includes an end cap, a rod body, and a sleeve cap. The end cap and the sleeve cap are detachably connected to opposite ends of the rod body. A horizontal channel and a clearance hole are both provided at the connection between the end cap and the rod body, and a vertical channel and a limiting cavity are both provided on the rod body.

[0012] In this embodiment, the end cap is provided with a first screw hole, and the end of the rod near the end cap is provided with a second screw hole. Screws are threaded into the first screw hole and the second screw hole. The end cap near the end of the rod is provided with a third screw hole, and the end of the rod near the end cap is provided with a screw section, which is threaded into the third screw hole.

[0013] In this embodiment, a positioning block is provided at one end of the end cap near the rod body, and a positioning groove is provided at one end of the rod body near the end cap, with the positioning block located in the positioning groove.

[0014] In this embodiment, the positioning module is connected to an endoscope probe.

[0015] In this embodiment, the positioning module includes two three-axis fine-tuning mechanisms, and the threaded probe and the endoscope probe are respectively connected to the two three-axis fine-tuning mechanisms.

[0016] The embodiments of this utility model have at least the following beneficial effects:

[0017] By contacting the spherical probe of the thread detection rod with the internal thread, and transmitting the displacement of the spherical probe to the stress sensing plate via a translation block and lifting column through an elastic element, the axial structural changes of the internal thread can be detected. The detection results are reliable and effectively reflect the internal thread structure, providing comprehensive and reliable results suitable for high-precision detection and analysis applications. Through the elastic buffering effect of the elastic element and the spherical structure at the end of the spherical probe, the spherical probe can adaptively and flexibly fit the internal thread structure. This not only effectively reduces collision damage between the spherical probe and the internal thread but also accurately reflects structural changes in the internal thread. The fitting detection action is reliable, the detection effect is comprehensive, and the detection results are accurate and reliable. Detection is achieved through the lifting and inserting method of the thread detection rod, resulting in a simple detection action and high detection efficiency. Furthermore, the force is redirected through the inclined plane transmission between the translation block and the lifting column, effectively improving the space utilization of the thread detection rod and effectively controlling its radial dimensions. This results in high versatility and a wide range of applications. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a three-dimensional structural diagram of the internal thread abnormality detection device according to an embodiment of the present utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the internal thread abnormality detection device according to an embodiment of the present utility model.

[0021] Figure 3 This is a top view of the internal thread abnormality detection device according to an embodiment of the present invention;

[0022] Figure 4 For along Figure 3 A schematic diagram of the cross-sectional structure of line A-A';

[0023] Figure 5 for Figure 4 A magnified structural diagram of B in the diagram;

[0024] Figure 6 for Figure 4 A magnified structural diagram of C;

[0025] Figure 7 This is an exploded structural diagram of the thread probe in the internal thread anomaly detection device according to an embodiment of the present invention.

[0026] Figure 8 This is an exploded view of the thread probe in the internal thread anomaly detection device according to an embodiment of the present invention.

[0027] Figure label:

[0028] Product positioning component 100, first linear drive module 110, product positioning fixture 120;

[0029] The detection and positioning component 200, the second linear drive module 210, the third linear drive module 220, the positioning module 230, the three-axis fine-tuning mechanism 231, and the endoscope probe 240 are included.

[0030] Threaded probe rod 300, end cap 310, horizontal channel 311, clearance hole 312, first screw hole 313, positioning block 314, rod body 320, vertical channel 321, limiting cavity 322, second screw hole 323, screw section 324, positioning groove 325, sleeve cap 330, third screw hole 331, translation block 340, spherical probe head 341, first inclined surface 342, lifting column 350, limiting piece 351, second inclined surface 352, stress sensing piece 360, elastic element 370, screw 380;

[0031] 400 products to be tested. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, if the wire sleeve or bracket is mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] During the processing and manufacturing of metal products, drilling, cutting, tapping and other operations are often required to give the metal products the corresponding mechanical structure. Threaded holes are one such operation, and the processing quality of threaded holes directly affects the assembly accuracy and performance of the product.

[0037] Traditional techniques primarily rely on manual visual inspection, which is highly subjective, yields unreliable results, and incurs high labor costs. Some techniques use go and no-go gauges to inspect the internal threads of the screw hole separately, requiring step-by-step inspection, resulting in low efficiency. The time-consuming process of tightening the go and no-go gauges further reduces efficiency. Rigid contact during tightening can easily cause jamming, damaging the internal thread structure and leading to secondary defects. The reliability of the inspection results is low. Go and no-go gauges can only determine whether the thread is going or not going, resulting in rough inspection results. They cannot achieve quantitative inspection of the internal thread structure and cannot meet the inspection requirements of high-precision internal thread structures.

[0038] The following is for reference only. Figure 1 To be continued Figure 8This invention describes an internal thread abnormality detection device according to an embodiment of the present invention. It has high detection efficiency, flexible detection action and adaptability to internal thread structure, and objective and reliable detection results.

[0039] Reference Figures 1 to 8 An embodiment of the present invention provides an internal thread abnormality detection device, comprising:

[0040] The product positioning component 100 includes a first linear drive module 110 and a product positioning fixture 120 connected to the first linear drive module 110. The product positioning fixture 120 is used to position the product 400 to be tested.

[0041] The detection and positioning component 200 includes a second linear drive module 210, a third linear drive module 220, and a positioning module 230. The positioning module 230 is located above the horizontal plane where the product positioning fixture 120 is located, and the positioning module 230 is connected to the third linear drive module 220. The third linear drive module 220 is connected to the second linear drive module 210. The first linear drive module 110, the second linear drive module 210, and the third linear drive module 220 are used to drive the movement in three dimensions of the spatial rectangular coordinate system, respectively. The first linear drive module 110, the second linear drive module 210, and the third linear drive module 220 can all be configured as a lead screw drive module or a synchronous belt drive module, etc., to achieve linear drive.

[0042] A threaded probe 300 is connected to the positioning module 230. The threaded probe 300 has a horizontal channel 311 extending radially along the threaded probe 300. One end of the horizontal channel 311 is connected to a clearance hole 312 penetrating the circumferential surface of the threaded probe 300. The axial cross-sectional area of ​​the clearance hole 312 is smaller than the axial cross-sectional area of ​​the horizontal channel 311. The top of the horizontal channel 311 is connected to a vertical channel 321 extending axially along the threaded probe 300. The top of the vertical channel 321 is provided with a limiting cavity 322. The axial cross-sectional area of ​​the limiting cavity 322 is larger than the axial cross-sectional area of ​​the vertical channel 321. A translation block 340 is slidably connected in the horizontal channel 311. One end of the translation block 340 is provided with a spherical probe 341 that passes through the relief hole 312. The end of the spherical probe 341 facing away from the translation block 340 is spherical, that is, the end of the spherical probe 341 facing the external environment is spherical. The cross-sectional area of ​​the spherical probe 341 gradually narrows along the axial direction towards the external environment, thereby ensuring that the spherical probe 341 can effectively enter the thread groove of the internal thread and effectively reduce the collision and wear between the spherical probe 341 and the internal thread. The other end of the translation block 340 is provided with a first inclined surface 342, and the vertical channel 32 is provided with a first inclined surface 342. A lifting column 350 is slidably connected in section 1. The bottom end of the lifting column 350 is provided with a second inclined surface 352 that abuts against the first inclined surface 342. The inclination angles of the first inclined surface 342 and the second inclined surface 352 are matched to achieve vertical guidance of the force between the lifting column 350 and the translation block 340. The bottom of the lifting column 350 is located on the side of the translation block 340 near the axis of the threaded probe rod 300. The top end of the lifting column 350 is provided with a limiting piece 351 located in the limiting cavity 322. The limiting cavity 322 is provided with a stress sensing piece 360 ​​and an elastic element 370. Preferably, the elastic element 370 is a spring. The two ends are respectively connected to the stress sensing plate 360 ​​and the limiting plate 351, so that the limiting plate 351 forms a movement tendency away from the stress sensing plate 360, thereby causing the lifting column 350 to form a downward movement tendency, and then causing the spherical probe head 341 to form a horizontal movement tendency protruding towards the external environment. The stress sensing plate 360 ​​is used to detect the force transmitted by the translation block 340 through the lifting column 350. The analysis system can analyze the detection result of the internal thread according to the pressure value corresponding to different times. Preferably, the stress sensing plate 360 ​​is a miniature pressure sensing module such as a resistive stress plate, a biaxial stress plate, or a triaxial stress plate.

[0043] During operation, the product to be tested, 400, is clamped on the product positioning fixture 120, for reference. Figure 2As shown, the first linear drive module 110 drives the product positioning fixture 120 to translate below the positioning module 230. The second linear drive module 210 and the third linear drive module 220 drive the positioning module 230 to move so that the thread probe 300 is aligned with the threaded hole of the product 400 to be inspected. During the process of the thread probe 300 descending and inserting into the threaded hole, the spherical probe head 341 contacts the internal thread. The axial fluctuation information of the internal thread is transmitted to the stress sensing plate 360 ​​through the spherical probe head 341, the translation block 340, the lifting column 350, the limiting block and the elastic element 370, thereby measuring the internal thread information of the threaded hole in the product 400 to be inspected. The pressure transmission between the translation block 340 and the lifting column 350 is deflected through the first inclined surface 342 and the second inclined surface 352, which can make full use of the space of the longitudinally extended thread probe 300, effectively reduce the radial dimension of the thread probe 300, and improve the adaptability to the inspection of small-sized threaded holes.

[0044] The spherical probe 341 of the thread probe rod 300 contacts the internal thread, and the displacement of the spherical probe 341 is transmitted to the stress sensing plate 360 ​​via the elastic element 370 through the translation block 340 and the lifting column 350. The stress sensing plate 360 ​​enables quantitative detection of the internal thread structure and real-time detection of axial structural changes. The detection results are reliable, and combined with the time dimension, they can effectively and dynamically analyze the structural changes of the thread groove, thus reflecting the internal thread structure. The detection results are comprehensive and reliable, meeting the requirements of high-precision detection and analysis applications. In application, the analysis system generates a time-pressure curve by recording time and pressure variables, effectively reflecting the thread structure. The detection accuracy is significantly better than traditional go / no-go gauge detection. Through the elastic buffering effect of the elastic element 370 and the spherical structure at the end of the spherical probe 341, the spherical probe 341 can... The internal thread structure achieves adaptive and flexible fitting, which not only effectively reduces collision damage between the spherical probe 341 and the internal thread, effectively avoids jamming and other problems, and prevents overload damage to the internal thread structure, but also accurately reflects the structural changes of the internal thread. The fitting detection action is reliable, and the displacement curve obtained by the contact detection of the spherical probe 341 can reflect the structural curve of the internal thread. The detection effect is comprehensive, and the detection results are true and reliable. The detection is achieved by lifting and inserting the thread probe rod 300 into the thread hole, which is simple and efficient. In addition, the force is redirected by the inclined plane transmission between the translation block 340 and the lifting column 350, which can effectively improve the space utilization of the thread probe rod 300 and effectively control the radial dimension of the thread probe rod 300, thereby adapting to thread hole structures of different diameters. It has high detection versatility and a wide range of applications.

[0045] It is understandable that the thread detection rod 300 comprises a horizontal channel 311, a clearance hole 312, a vertical channel 321, a limiting cavity 322, a translation block 340, a spherical detection head 341, a lifting column 350, a limiting piece 351, an elastic element 370, and a stress sensing piece 360, forming a detection module. The detection module consists of four sets, which are evenly distributed around the axis of the thread detection rod 300 and along the circumference of the thread detection rod 300. In other words, the four sets of detection modules are evenly distributed at 90° intervals around the axis of the thread detection rod 300. Through these four sets of detection modules, contact-type anomaly detection can be performed in four directions of the internal thread, improving the comprehensiveness of the detection effect.

[0046] The circumferentially symmetrical layout allows the spherical probe 341 to simultaneously contact all four quadrants of the internal thread, enabling synchronous detection of the internal thread in all four circumferential quadrants and effectively avoiding missed detections caused by single-point detection. Through the coordinated operation of multiple probe modules, not only is detection efficiency improved, but by comparing the force data of each spherical probe 341, key parameters such as thread concentricity and pitch uniformity can be more accurately determined, significantly enhancing the comprehensiveness and reliability of the detection results.

[0047] It is understandable that the horizontal channel 311, the vertical channel 321, the translation block 340, and the lifting column 350 are all in the shape of a quadrangular prism. Among them, the horizontal channel 311 is a rectangular cross-section channel arranged horizontally on the axis, the vertical channel 321 is a rectangular cross-section channel arranged vertically on the axis, the translation block 340 is a solid quadrangular prism structure arranged horizontally on the axis, and the lifting column 350 is a solid quadrangular prism structure arranged vertically on the axis.

[0048] The quadrangular prism-shaped limiting structure between the horizontal channel 311 and the translation block 340 can effectively prevent problems such as deflection. The quadrangular prism-shaped limiting structure between the vertical channel 321 and the lifting column 350 can effectively prevent problems such as deflection. This can effectively improve the stability of the relative position between the thread detection rod 300 and the translation block 340 and the lifting column 350, respectively. The overall structure has high stability, can avoid detection errors caused by deflection, and has high detection accuracy.

[0049] It is understood that the thread detection rod 300 includes an end cap 310, a rod body 320, and a sleeve cap 330. The end cap 310 and the sleeve cap 330 are detachably connected to opposite ends of the rod body 320. Specifically, the end cap 310 is connected to the bottom end of the rod body 320, and the sleeve cap 330 is connected to the top end of the rod body 320. The horizontal channel 311 and the clearance hole 312 are both located at the connection between the end cap 310 and the rod body 320. The axis of the horizontal channel 311 is collinear with the axis of the clearance hole 312. The horizontal surface along the axis of the horizontal channel 311 divides the horizontal channel 311 and the clearance hole 312. The upper half of the horizontal channel 311 and the clearance hole 312 are located at the bottom end of the rod 320, and the lower half of the horizontal channel 311 and the clearance hole 312 are located at the top end of the end cap 310. The axial cross-sectional area of ​​the horizontal channel 311 is larger than the axial cross-sectional area of ​​the clearance hole 312. After the end cap 310 is connected to the rod 320, a continuous horizontal channel 311 and clearance hole 312 are formed between the end cap 310 and the rod 320. This can effectively limit the position of the translation block 340 and effectively prevent the translation block 340 from completely leaving the horizontal channel 311 and reaching outside the thread detection rod 300.

[0050] Specifically, both the vertical channel 321 and the limiting cavity 322 are located in the rod body 320. The limiting cavity 322 is connected to the end of the vertical channel 321 near the cover 330. The axial cross-sectional area of ​​the limiting cavity 322 is larger than that of the vertical channel 321. After the cover 330 is connected to the rod body 320, the position of the lifting column 350 can be effectively limited. Through the detachable connection between the rod body 320 and the cover 330 and the end cover 310 respectively, the internal structure of the thread detection rod 300 can be arranged conveniently. The assembly and production operation is simple, the production efficiency is high, and the maintenance is convenient.

[0051] It is understood that the end cap 310 is provided with a first screw hole 313, which penetrates the end cap 310. The end of the rod 320 near the end cap 310 is provided with a second screw hole 323 that matches the first screw hole 313. Preferably, the second screw hole 323 is a blind hole. A screw 380 is threaded into the first screw hole 313 and the second screw hole 323. The screw 380 can effectively lock the position between the rod 320 and the end cap 310, making disassembly and assembly convenient. The end of the sleeve cap 330 near the rod 320 is provided with a third screw hole 331, which is a blind hole. The limiting cavity 322 is connected to the end of the third screw hole 331 away from the end cap 310 to realize the communication between the vertical channel 321 and the limiting cavity 322. The end of the rod 320 near the sleeve cap 330 is provided with a screw section 324 that matches the third screw hole 331. The screw section 324 is threaded into the third screw hole 331, making disassembly and assembly convenient.

[0052] It is understood that the end cap 310 is provided with a positioning block 314 at the end near the rod 320, and the end of the rod 320 is also provided with a positioning groove 325 that matches the positioning block 314. The positioning block 314 is located in the positioning groove 325. Preferably, both the positioning block 314 and the positioning groove 325 are prismatic, and the second screw hole 323 is connected to the bottom of the positioning groove 325. The first screw hole 313 also penetrates the positioning block 314. By cooperating with the positioning groove 325, the reliability of the alignment between the end cap 310 and the rod 320 can be effectively improved, and circumferential misalignment can be avoided.

[0053] Understandably, the positioning module 230 is also connected to an endoscope probe 240, which is an optical fiber tube equipped with a light-emitting module that can collect and transmit optical image information. One end of the endoscope probe 240 is used for detection, and the other end is used to connect to an external image sensor. The external image sensor can resolve the optical image information into electronic image information that the analysis system can recognize.

[0054] The endoscope probe 240 can perform supplementary detection in addition to the detection by the thread probe 300, thereby improving the accuracy of internal thread anomaly detection. For thread holes with extremely small dimensions, the endoscope probe 240 can effectively penetrate into their interior for detection, which can compensate for a small number of thread hole structures that are not suitable for detection by the thread probe 300, and has strong versatility.

[0055] It is understood that the positioning module 230 includes two three-axis fine-tuning mechanisms 231, both connected to the third linear drive module 220. The threaded probe 300 and the endoscope probe 240 are respectively connected to the two three-axis fine-tuning mechanisms 231. The three-axis fine-tuning mechanism 231 is used to realize the small displacement adjustment in the x, y, and z directions. The adjustment in each direction is realized through the following structure: the movement trajectory of the slider is limited by the slide block, the lead screw is connected to the slide block, and the nut is connected to the slider. The displacement is transmitted by the lead screw and the nut, thereby realizing the fine adjustment in that direction.

[0056] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for detecting abnormal internal threads, characterized in that, include: The product positioning component (100) includes a first linear drive module (110) and a product positioning fixture (120) connected to the first linear drive module (110). The detection and positioning component (200) includes a second linear drive module (210), a third linear drive module (220) and a positioning module (230), wherein the positioning module (230) is connected to the third linear drive module (220) and the third linear drive module (220) is connected to the second linear drive module (210). A threaded probe (300) is connected to the positioning module (230). The threaded probe (300) has a horizontal channel (311). One end of the horizontal channel (311) is connected to a clearance hole (312). The top of the horizontal channel (311) is connected to a vertical channel (321). The top of the vertical channel (321) is provided with a limiting cavity (322). A translation block (340) is slidably connected in the horizontal channel (311). One end of the translation block (340) is provided with a spherical probe (341) that passes through the clearance hole (312). The other end of the translation block (340) is provided with a first inclined surface. (342) A lifting column (350) is slidably connected in the vertical channel (321). The bottom end of the lifting column (350) is provided with a second inclined surface (352) that abuts against the first inclined surface (342). The top end of the lifting column (350) is provided with a limiting piece (351) located in the limiting cavity (322). The limiting cavity (322) is provided with a stress sensing piece (360) and an elastic element (370). The two ends of the elastic element (370) are respectively connected to the stress sensing piece (360) and the limiting piece (351) so that the limiting piece (351) forms a movement tendency to move away from the stress sensing piece (360).

2. The internal thread abnormality detection device according to claim 1, characterized in that, The horizontal channel (311), the clearance hole (312), the vertical channel (321), the limiting cavity (322), the translation block (340), the spherical probe (341), the lifting column (350), the limiting piece (351), the elastic element (370), and the stress sensing piece (360) constitute a detection module. The detection module has four sets and is evenly distributed around the axis of the threaded probe rod (300).

3. The internal thread abnormality detection device according to claim 1, characterized in that, The horizontal channel (311), the vertical channel (321), the translation block (340), and the lifting column (350) are all in the shape of a quadrangular prism.

4. The internal thread abnormality detection device according to claim 1, characterized in that, The threaded probe (300) includes an end cap (310), a rod body (320), and a sleeve cap (330). The end cap (310) and the sleeve cap (330) are detachably connected to opposite ends of the rod body (320). The horizontal channel (311) and the clearance hole (312) are both located at the connection between the end cap (310) and the rod body (320). The vertical channel (321) and the limiting cavity (322) are both located on the rod body (320).

5. The internal thread abnormality detection device according to claim 4, characterized in that, The end cap (310) is provided with a first screw hole (313), and the rod body (320) is provided with a second screw hole (323) at one end near the end cap (310). Screws (380) are threadedly connected in the first screw hole (313) and the second screw hole (323). The sleeve cap (330) is provided with a third screw hole (331) at one end near the rod body (320), and the rod body (320) is provided with a screw section (324) at one end near the sleeve cap (330). The screw section (324) is threadedly connected in the third screw hole (331).

6. The internal thread abnormality detection device according to claim 5, characterized in that, The end cap (310) is provided with a positioning block (314) at one end near the rod (320), and the rod (320) is also provided with a positioning groove (325) at one end near the end cap (310), with the positioning block (314) located in the positioning groove (325).

7. The internal thread abnormality detection device according to claim 1, characterized in that, The positioning module (230) is connected to an endoscope probe (240).

8. The internal thread abnormality detection device according to claim 7, characterized in that, The positioning module (230) includes two three-axis fine-tuning mechanisms (231), and the threaded probe (300) and the endoscope probe (240) are respectively connected to the two three-axis fine-tuning mechanisms (231).

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