Deformation transmission detection device for bolt plasticity detection

Abstract

The invention relates to the technical field of bolt detection, and discloses a deformation transmission detection device for bolt plasticity detection, the deformation transmission detection device comprises a bolt and a workbench, the workbench is provided with a rotating seat and a detection mechanism; the detection mechanism comprises a shell arranged on the workbench, and a probe and a marking assembly are arranged on the shell; the bolt is installed on the rotating base, the probe is controlled to move to make contact with the surface of the bolt, then the rotating base is driven to rotate, the probe conducts scribing around the surface of the bolt, and then the scribing track of the probe is marked through the marking assembly. According to the deformation transmission detection device for bolt plasticity detection, a device which is non-destructive, full-domain visual and quantifiable in plasticity gradient distribution and is suitable for industrial field rapid detection is provided, a mechanical deformation transmission marking mechanism is innovatively put forward, and through a closed loop of probe scribing, displacement transmission and synchronous marking, the detection accuracy is greatly improved. And precise mapping of plastic distribution of the bolt is realized.

Description

Technical Field

[0001] This invention relates to the field of bolt testing technology, specifically to a deformation transmission detection device for bolt plasticity testing. Background Technology

[0002] As a core component of mechanical connections, bolts' plastic deformation capacity directly affects the safety and lifespan of structures. In aerospace, nuclear power, and bridge engineering, bolts must withstand extreme conditions such as alternating loads, high temperatures, and high pressures. Uneven plastic distribution on the surface and near the surface can lead to stress concentration, fatigue cracks, and even sudden fracture. Traditional testing methods have significant limitations:

[0003] 1. Bottlenecks in destructive testing: Current metallographic analysis methods require cutting bolt samples and observing the degree of lattice deformation under a microscope. This method takes several hours and can only reflect the plastic state of a local section, failing to obtain the plastic gradient distribution over the entire bolt area (especially the stress concentration zone at the thread root). For batch testing or online quality control scenarios, this method is almost impractical in engineering.

[0004] 2. Blind Spot in Hardness Testing: While Rockwell / Vickers hardness testing preserves sample integrity, the indentation depth is only 0.1–0.3 mm, making it difficult to capture deep plastic deformation (such as the difference between the core and surface of the bolt shank). More importantly, hardness values ​​only indirectly reflect the material's yield strength and cannot directly quantify plastic strain energy. Studies have shown that 45# steel bolts with the same hardness can have fracture elongation rates that differ by up to 40%, making it difficult to comprehensively assess service risks using a single hardness index.

[0005] 3. Engineering gaps in understanding plasticity transfer mechanisms: During bolt tightening, the path of plastic deformation transfer from the thread engagement zone to the shank directly affects the uniformity of load bearing. Traditional methods lack visual recording tools for the deformation transfer trajectory, resulting in a lack of data support for design optimization. For example, in wind turbine tower bolt fracture accidents, 80% of failures originate from crack initiation caused by plastic accumulation at the thread root, but current technology cannot pinpoint the starting point of plastic distortion. Summary of the Invention

[0006] This invention provides a deformation transfer detection device for bolt plasticity testing. It offers a non-destructive, fully visualized, and quantifiable plasticity gradient distribution device suitable for rapid on-site industrial testing. It innovatively proposes a "mechanical deformation transfer marking" mechanism, which achieves the beneficial effect of accurate mapping of bolt plasticity distribution through a closed loop of probe scratching-displacement transfer-synchronous marking. This solves the problems mentioned in the background art, such as the bottleneck of destructive testing, the deep blind zone of hardness testing, and the engineering gap in the plasticity transfer mechanism of traditional testing methods.

[0007] The present invention provides the following technical solution: a deformation transmission detection device for bolt plasticity testing, comprising a bolt and a worktable, wherein a rotating seat and a detection mechanism are provided on the worktable;

[0008] The detection mechanism includes a housing disposed on the workbench, and a probe and a marking assembly are disposed on the housing;

[0009] By mounting the bolt on the rotating base and controlling the probe to move and contact the surface of the bolt, the rotating base is then driven to rotate, causing the probe to scribble around the surface of the bolt, and the scribing trajectory of the probe is then marked by the marking component.

[0010] As an optional embodiment of the deformation transfer detection device for bolt plasticity testing described in this invention, a three-jaw chuck is further provided on the worktable, and the three-jaw chuck is used to fix the bolt.

[0011] As an optional embodiment of the deformation transmission detection device for bolt plasticity testing according to the present invention, the detection mechanism further includes a mounting base slidably disposed on the housing, the mounting base being elastically connected to the housing via a spring, and the probe being connected to the mounting base via a connecting assembly.

[0012] As an optional embodiment of the deformation transmission detection device for bolt plasticity testing according to the present invention, the connecting assembly includes a slot formed on the probe, a rotating rod rotatably disposed in the slot, an external thread on the rotating rod, and an internal thread in the mounting base, wherein the external thread is adapted to the internal thread.

[0013] As an optional embodiment of the deformation transmission detection device for bolt plasticity testing described in this invention, the marking component includes a turntable, the turntable having a plurality of discs arranged circumferentially, each of the discs being provided with a sliding rod, the turntable having a plurality of second sliding grooves arranged circumferentially, the sliding rods being slidably connected to the plurality of second sliding grooves respectively, and a push rod being provided on the mounting base.

[0014] As an optional embodiment of the deformation transmission detection device for bolt plasticity testing described in this invention, the rotating base is provided with a plurality of connecting columns, the turntable is provided with a plurality of sliding rods, and the plurality of sliding rods are respectively slidably connected to the plurality of connecting columns.

[0015] As an optional embodiment of the deformation transmission detection device for bolt plasticity testing according to the present invention, the marking component further includes a fixing component, which is used to fix the position of the plurality of discs.

[0016] As an optional embodiment of the deformation transmission detection device for bolt plasticity testing described in this invention, the fixing component includes a plurality of screws respectively disposed on a plurality of discs, and each of the plurality of screws is threadedly connected with a nut.

[0017] As an optional embodiment of the deformation transmission detection device for bolt plasticity testing according to the present invention, the fixing component further includes a first arc-shaped rack disposed on the housing, and a plurality of nuts are provided with gears, wherein the first arc-shaped rack is adapted to the plurality of gears.

[0018] As an optional embodiment of the deformation transmission detection device for bolt plasticity testing according to the present invention, the fixing component further includes a second arc-shaped rack disposed on the housing, the second arc-shaped rack being adapted to a plurality of the gears.

[0019] The present invention has the following beneficial effects:

[0020] 1. This deformation transmission detection device for bolt plasticity testing achieves visualized marking of the entire plasticity distribution. Through the mechanical transmission chain design, the probe contacts the bolt surface under spring preload. When the rotating seat rotates, the probe scratches along the axial direction. According to the local plasticity difference of the bolt, the scratching resistance changes: the high plasticity area (such as the annealed area) produces greater deformation, the probe is "pushed" deeper, and the mounting seat (440) moves radially inward; the low plasticity area (such as the quenched hardening area) causes the probe to move outward.

[0021] A synchronization marking mechanism is set up: the mounting seat moves by pushing the circular array of disks via push rods. When the push rods move inward (corresponding to the high plasticity zone), the disks maintain their initial inner ring position; when the push rods move outward (corresponding to the low plasticity zone), the disks are pushed to the outer ring. The final disk position distribution directly maps to the bolt's 360° plasticity distribution pattern.

[0022] Its engineering value lies in the fact that operators do not need instruments; they can quickly identify areas of weak plasticity (such as continuous convex discs indicating fatigue crack risk areas) simply by observing the concave and convex contours of the disc array, thus greatly improving detection efficiency.

[0023] 2. This deformation transfer detection device for bolt plasticity testing features a dual adjustment system for adaptive detection accuracy. Probe fine-tuning mechanism: Axial adjustment: The probe's scribe depth is changed by the rise and fall of the slide rod within the connecting column (adapting to bolts of different strengths). Radial adjustment: The rotating rod drives the external and internal threads to engage, ensuring precise horizontal feed of the probe and consistent initial contact pressure.

[0024] Marking sensitivity optimization: The number of disks can be configured as needed (standard design is 24 disks, resolution 15°). Through the sliding pair design of the second groove and slide bar, the disk displacement can be amplified to 3-5 times the actual probe displacement, improving human eye recognition.

[0025] 3. This bolt plasticity testing deformation transmission detection device has a self-locking marking and fixing device (to solve dynamic interference). Rack-and-gear linkage locking: When the disc moves to the target position, the gear rotating with the disc meshes with the first arc-shaped rack (inner ring position) or the second arc-shaped rack (outer ring position) on the housing.

[0026] The gear rotation drives the nut to screw in along the screw until it presses against the side wall of the turntable, instantly locking the position of the turntable.

[0027] Its technical advantages lie in avoiding disk displacement caused by vibration during the testing process, thus ensuring data reliability. Compared to electromagnetic locking solutions, mechanical locking eliminates temperature drift and magnetic interference issues, making it suitable for heavy industrial environments.

[0028] 4. This deformation transfer detection device for bolt plasticity testing achieves breakthroughs in cost and compatibility. De-electronic design: No sensors, data acquisition cards, or software analysis are required throughout the process, reducing equipment costs to 1 / 10 of traditional ultrasonic equipment. Multi-size compatibility: The three-jaw chuck can hold M6–M30 bolts; changing the probes to different curvatures allows for the detection of complex surfaces such as external threads and inner hole walls. Extended application scenarios: In addition to plasticity testing, defect screening can be simultaneously achieved through scratch trajectory analysis (e.g., discontinuous scratches indicating material inclusions). Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 This is a cross-sectional view of the overall structure of the present invention.

[0031] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0032] Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at point B in the middle.

[0033] Figure 5 This is a schematic diagram of the overall exploded structure of the present invention.

[0034] Figure 6 This is a schematic diagram of the marking component in this invention.

[0035] Figure 7 This is an exploded structural diagram of the marking component in this invention.

[0036] Figure 8 This is a schematic diagram illustrating the working principle of the present invention.

[0037] In the diagram: 100, Bolt; 200, Workbench; 210, Three-jaw chuck; 300, Rotary seat; 400, Detection mechanism; 410, Housing; 420, Probe; 430, Marking assembly; 431, Turntable; 432, Disc; 433, Slide rod; 434, Second slide groove; 435, Push rod; 436, Fixing assembly; 4361, Screw; 4362, Nut; 4363, Gear; 4364, First arc-shaped rack; 4365, Second arc-shaped rack; 437, Connecting column; 438, Slide rod; 440, Mounting base; 450, Spring; 460, Connecting assembly; 461, Rotary groove; 462, Rotating rod; 463, External thread; 464, Internal thread. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1, please refer to Figures 1-5 A deformation transmission detection device for testing the plasticity of bolts includes a bolt 100 and a worktable 200, wherein a rotating seat 300 and a detection mechanism 400 are provided on the worktable 200.

[0040] The detection mechanism 400 includes a housing 410 disposed on the workbench 200, and a probe 420 and a marking assembly 430 are disposed on the housing 410.

[0041] By mounting the bolt 100 on the rotating base 300 and controlling the probe 420 to move and contact the surface of the bolt 100, the rotating base 300 is then driven to rotate, causing the probe 420 to scratch around the surface of the bolt 100, and the scratching trajectory of the probe 420 is then marked by the marking component 430.

[0042] The workbench 200 is also provided with a three-jaw chuck 210, which is used to fix the bolt 100;

[0043] The detection mechanism 400 further includes a mounting base 440 slidably disposed on the housing 410. The mounting base 440 is elastically connected to the housing 410 by a spring 450, and the probe 420 is connected to the mounting base 440 by a connecting assembly 460.

[0044] In this embodiment, the three-jaw chuck 210 can be an electric chuck or a manual chuck. First, the bolt 100 is placed in the three-jaw chuck 210, and the three-jaw chuck 210 is used to position and fix the bolt 100 at the center of the worktable 200.

[0045] Then adjust the positions of the housing 410 and the probe 420 so that the probe 420 contacts the surface of the bolt 100 and engraves to a certain depth. Then, by rotating the rotating base 300, the probe 420 is driven to engrave around the surface of the bolt 100.

[0046] The spring 450 is in a compressed, stored state, tending to push the mounting base 440 and the probe 420 towards the probe 420. When the probe 420 contacts different areas on the bolt 100, the scribe line traced by the probe 420 will vary due to the different plasticities of the various areas on the bolt 100 surface. When the probe 420 contacts a low-plasticity area on the bolt 100 surface, the probe 420 is positioned towards the outer edge of the worktable 100; when the probe 420 contacts a high-plasticity area on the bolt 100 surface, the probe 420 will move inward. A range for the probe 420 to move is defined. When the probe 420 is outside a certain scribe depth, the corresponding bolt 100 surface area is marked as a low-plasticity area; when the probe 420 is within a certain scribe depth, the corresponding bolt 100 surface area is marked as a high-plasticity area.

[0047] The specific structure and working principle of the three-jaw chuck 210 are described in detail as conventional technical means and will not be elaborated upon.

[0048] Example 2 is an improvement upon Example 1. For details, please refer to [link / reference]. Figures 1-8 The connecting component 460 includes a rotating groove 461 opened on the probe 420, a rotating rod 462 rotatably disposed in the rotating groove 461, an external thread 463 provided on the rotating rod 462, and an internal thread 464 opened in the mounting base 440, with the external thread 463 and the internal thread 464 being adapted to each other.

[0049] The marking component 430 includes a turntable 431, on which a plurality of discs 432 are arranged circumferentially, and each of the discs 432 is provided with a slide rod 433. The turntable 431 is provided with a plurality of second slide grooves 434 circumferentially, and the slide rods 433 are respectively slidably connected in the plurality of second slide grooves 434. A push rod 435 is provided on the mounting base 440.

[0050] The rotary table 300 is provided with several connecting posts 437, and the turntable 431 is provided with several sliding rods 438, which are slidably connected to the connecting posts 437 respectively.

[0051] In this embodiment: the turntable 431 is coaxial with the bolt 100. A circular disc 432 is installed inside the turntable 431. A second sliding groove 434 is formed on the turntable 431, running vertically through it. The second sliding groove 434 is distributed along several radial directions of the turntable 431. The disc 432 is limited by the sliding rod 433 and slides only in the radial direction of the turntable 431. The initial position of the push rod 435 is as follows: Figure 8 As shown, it is positioned between two disks 432, and in the initial state, all disks 432 are located close to the center of bolt 100.

[0052] When the probe 420 contacts the low-plasticity area on the bolt 100, the mounting base 440 and the push rod 435 are in the outermost position. At this time, as the rotating base 300 rotates, each disc 432 that passes through the push rod 435 will be pushed outward by the push rod 435. That is, the disc 432 in the low-plasticity area is located away from the center of the bolt 100.

[0053] When the probe 420 moves to contact the highly plastic area, the mounting base 440 and the push rod 435 are in a position close to the inside. At this time, each disc 432 passing through the push rod 435 will not contact the push rod 435. That is, the disc 432 in the highly plastic area is positioned close to the center of the bolt 100.

[0054] by Figure 8 For example, if the final circle of disks is distributed as follows: Figure 8 As shown, the corresponding ring of sliders 433 is also distributed in the same way.

[0055] The probe 438 can be adjusted to different height areas on the surface of the bolt 100 by sliding the slide rod 438 within the connecting post 437 by pulling the turntable 431. The horizontal position of the probe can be adjusted by rotating the rotating rod 462. Specifically, this is controlled according to the opening direction of the external thread 463 and the internal thread 464. Figure 3 For example, when the rotating rod 462 moves to the right in the spiral, the rotating rod 462 rotates within the rotating groove 461, causing the probe 420 to move to the right on the mounting base 440. When the rotating rod 462 moves to the left in the spiral, the rotating rod 462 rotates within the rotating groove 461, causing the probe 420 to move to the left on the mounting base 440.

[0056] After manual inspection, the plastic changes at different locations on the surface of bolt 100 can be measured by the positional distribution of a circular disk 432.

[0057] Example 3 is an improvement upon Example 2. For details, please refer to [link / reference]. Figures 1-6 The marking component 430 also includes a fixing component 436, which is used to fix the positions of the plurality of disks 432;

[0058] The fixing component 436 includes a plurality of screws 4361 respectively disposed on a plurality of discs 432, and each of the plurality of screws 4361 is threadedly connected with a nut 4362;

[0059] The fixing component 436 also includes a first arc-shaped rack 4364 disposed on the housing 410, and a plurality of nuts 4362 are each provided with a gear 4363, and the first arc-shaped rack 4364 is adapted to the plurality of gears 4364;

[0060] The fixing component 436 also includes a second arc-shaped rack 4365 disposed on the housing 410, which is adapted to a plurality of gears 4364.

[0061] In this embodiment: after each disk 432 is pushed to the outer position by the push rod 435, or remains in the inner position without contacting the push rod 435, the position of each disk 432 needs to be fixed.

[0062] Specifically, a certain sliding friction force can be set between the disc 432 and the turntable 431 to fix the position of the disc 432. A fixing component 436 can also be added.

[0063] by Figure 6 For example, when the disc 432 is not pushed by the push rod 435 and is in the upper position, the gear 4363 is in the lower position. When the gear 4363 moves in a circular motion, it contacts and meshes with the first arc-shaped rack 4364, causing the gear 4363 and the nut 4362 to rotate. The nut 4362 moves to the right in a spiral motion until it contacts the left end of the turntable 431, thus fixing the position of the screw 4361 and the disc 432.

[0064] When the disc 432 is pushed to the lower position by the push rod 435, the gear 4363 contacts and meshes with the second arc-shaped rack 4365 during the circumferential motion, causing the gear 4363 and the nut 4362 to rotate. The nut 4362 moves to the right in a spiral motion until it contacts the left end of the turntable 431, thus fixing the position of the screw 4361 and the disc 432.

[0065] The probe 420 is used to measure the plastic change of the surface of the bolt 100 by circling the surface of the bolt 100. The deformation of the bolt 100 caused by the radial movement of the probe 420 is transmitted through the marking component 430 and then transmitted to a ring of gears 4363. The positional change of the gears 4363 is then visually displayed.

[0066] Device usage procedure:

[0067] Step S1: Bolt clamping and initial positioning;

[0068] Clamping: Place the bolt 100 to be tested at the center of the three-jaw chuck 210 on the worktable 200, tighten the chuck fixing bolts, and ensure that the axis is perpendicular to the worktable 200.

[0069] Probe pre-adjustment: Axial positioning: Lift the turntable 431 to make the slide bar 438 slide upward within the connecting column 437, and adjust the probe 420 to the bolt detection area (such as the rod or thread area).

[0070] Radial positioning: Rotate the lever 462 to drive the probe 420 to move horizontally until the tip lightly touches the surface of the bolt 100 (the initial pressure is set by the preload of the spring 450).

[0071] Step S2: Detect execution and displacement transfer;

[0072] Start-up test: Drive the rotating base to rotate at a constant speed of 300, which in turn drives the bolt to rotate circumferentially.

[0073] Probe response: High plasticity zone contact: Local softening of bolt 100 reduces the resistance of probe 420, and spring 450 pushes mounting base 440 and probe radially inward (towards the center of bolt 100). Low plasticity zone contact: Hardened area resists scratching, pushing probe 420 outward (away from the center).

[0074] Displacement amplification and transmission: The radial displacement of the mounting base 440 is transmitted to the array of disks 432 via push rod 435. When the push rod moves outward (low plasticity zone): the push rod 435 pushes the disks 432 along the second groove 434 to slide outward. When the push rod moves inward (high plasticity zone): the disks 432 do not contact the push rod 435, maintaining the initial position of the inner ring.

[0075] Step S3: Mark locking and data solidification;

[0076] Rack-triggered locking: When the disc 432 moves to the target position (inner ring or outer ring), the gear 4363, which revolves with the disc 431, enters the rack meshing area;

[0077] Inner ring disk: Gear 4363 meshes with the first arc-shaped rack 4364. Outer ring disk: Gear 4363 meshes with the second arc-shaped rack 4365.

[0078] Nut self-locking: The rotation of gear 4363 drives nut 4362 to screw along screw 4361, pressing against the side wall of turntable 431 and instantly locking the position of the turntable.

[0079] Test completed: The machine stops after the rotary table 300 rotates one full revolution, and all discs 432 are fixed in position.

[0080] This device transforms abstract plastic parameters into intuitive mechanical displacement markers, filling the gap in full-range visual plasticity detection of bolts. Its core innovation lies in its mechanical transmission chain design (probe 420-push rod 435-disc 432) and double rack locking system, enabling "electrical-free detection" in industrial scenarios while ensuring accuracy. It is particularly suitable for rapid safety assessment of in-service bolts in energy, rail transportation, and other fields, providing a data foundation for plastic deformation-oriented bolt design.

[0081] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0082] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A deformation transmission detection device for bolt plasticity testing, comprising a bolt (100) and a worktable (200), characterized in that: The workbench (200) is equipped with a rotary table (300) and a testing mechanism (400). The detection mechanism (400) includes a housing (410) disposed on the workbench (200), and a probe (420) and a marking assembly (430) are disposed on the housing (410). By mounting the bolt (100) on the rotating base (300) and controlling the probe (420) to move and contact the surface of the bolt (100), the rotating base (300) is then driven to rotate, so that the probe (420) scratches around the surface of the bolt (100), and the scratching trajectory of the probe (420) is marked by the marking component (430).

2. The deformation transmission detection device for bolt plasticity testing according to claim 1, characterized in that: The workbench (200) is also equipped with a three-jaw chuck (210), which is used to fix the bolt (100).

3. The deformation transmission detection device for bolt plasticity testing according to claim 1, characterized in that: The detection mechanism (400) further includes a mounting base (440) slidably disposed on the housing (410), the mounting base (440) being elastically connected to the housing (410) by a spring (450), and the probe (420) being connected to the mounting base (440) by a connecting assembly (460).

4. The deformation transmission detection device for bolt plasticity testing according to claim 3, characterized in that: The connecting assembly (460) includes a slot (461) formed on the probe (420), a rotating rod (462) is rotatably disposed in the slot (461), the rotating rod (462) is provided with an external thread (463), and the mounting base (440) is provided with an internal thread (464), the external thread (463) and the internal thread (464) are adapted to each other.

5. The deformation transmission detection device for bolt plasticity testing according to claim 1, characterized in that: The marking component (430) includes a turntable (431), on which a plurality of discs (432) are arranged circumferentially, and each of the discs (432) is provided with a slide rod (433). The turntable (431) is provided with a plurality of second slide grooves (434) circumferentially, and the plurality of slide rods (433) are respectively slidably connected in the plurality of second slide grooves (434). The mounting base (440) is provided with a push rod (435).

6. The deformation transmission detection device for bolt plasticity testing according to claim 5, characterized in that: The rotary table (300) is provided with a plurality of connecting posts (437), and the turntable (431) is provided with a plurality of sliding rods (438), and the plurality of sliding rods (438) are respectively slidably connected to the plurality of connecting posts (437).

7. The deformation transmission detection device for bolt plasticity testing according to claim 5, characterized in that: The marking component (430) further includes a fixing component (436) for fixing the positions of the plurality of disks (432).

8. A deformation transmission detection device for bolt plasticity testing according to claim 7, characterized in that: The fixing component (436) includes a plurality of screws (4361) respectively disposed on a plurality of discs (432), and each of the plurality of screws (4361) is threaded with a nut (4362).

9. A deformation transmission detection device for bolt plasticity testing according to claim 8, characterized in that: The fixing component (436) further includes a first arc-shaped rack (4364) disposed on the housing (410), and a gear (4363) is disposed on each of the nuts (4362). The first arc-shaped rack (4364) is adapted to the gears (4364).

10. A deformation transmission detection device for bolt plasticity testing according to claim 9, characterized in that: The fixing component (436) further includes a second arc-shaped rack (4365) disposed on the housing (410), the second arc-shaped rack (4365) being adapted to a plurality of the gears (4364).

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