High-strength bolt detector

Abstract

The application relates to the technical field of bolt detection, and discloses a high-strength bolt detector, which comprises a detection table and a fixed cover fixedly installed on one side of the upper end of the detection table, the inner side of the fixed cover is fixedly installed with a driving speed reducer, the driving end of the driving speed reducer is fixedly installed with a torque sensor, one end of the torque sensor away from the driving speed reducer is fixedly installed with a bolt cylinder one, the other side of the upper end of the detection table is fixedly installed with a sliding rail, the outer side of the sliding rail is slidably sleeved with bearing plates one, the upper side of one of the bearing plates one is provided with a screwing assembly, the upper end of the other bearing plate one is rotatably installed with a bearing plate two, the upper side of the bearing plate two is provided with a detection assembly, the screwing assembly driven by a torsional spring is used to replace manual work, a plurality of groups of circularly distributed and one-to-one corresponding plug blocks and plug slots are combined, the screwing force of the nut is ensured to be uniform and the depth is ensured to be consistent, the axial force data fluctuation and distortion are avoided, and the accuracy of the multiple detection data is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of bolt detection, and in particular to a high-strength bolt detector. BACKGROUND

[0002] In heavy engineering such as buildings, bridges, wind power and ships, high-strength bolts are the core components of component connection, and parameters such as pre-tightening force and axial force and torque directly determine the stability and safety of the structure. With the expansion of engineering scale and the improvement of load level, the requirement for the quality of high-strength bolt connection is increasingly strict. If the bolt is not pre-tightened enough, it is easy to cause loosening failure, and if it is pre-tightened too much, it may cause fatigue fracture. Therefore, precise detection equipment is needed to control key parameters to avoid safety accidents caused by connection failure.

[0003] With the increasing urgency of this demand, the research and development of integrated, precise and automated high-strength bolt detectors are promoted. By using high-precision axial force sensors such as strain gauge type, piezoelectric type and torque sensors, the stress on the bolt is converted into an electrical signal to realize the precise quantification of physical quantities, solving the problems of inaccuracy, inefficiency and incompleteness of traditional detection. For example, the existing Chinese patent with the publication number CN212134047U discloses a high-strength bolt detector. First, the inner baffle is adjusted to the appropriate position according to the length of the bolt. The position corresponding to the inner baffle of the shortest specification is that the front of the inner baffle is aligned with the front of the force sensor. For bolts of other sizes, the position of the inner baffle is adjusted and a lengthening pad is added. The outer baffle is mounted on the force sensor fixing disc. The test pad and nut are mounted on the bolt. The high-strength bolt pair fixture unit is moved so that the nut enters the hexagonal sleeve. The bracket is pushed to hold the hexagonal sleeve on the bolt hexagonal head. The controller test button is pressed to start the test. The controller collects data from the force sensor and torque sensor and calculates the test results.

[0004] However, the above and existing related technologies often have the following defects: In high-strength bolt detection, multiple detections are usually required to avoid errors caused by differences in bolt material uniformity, slight clamping deviations, environmental transient fluctuations and other accidental factors in a single detection process to ensure the authority and compliance of the detection results. However, the nut is manually tightened for installation during the detection process. On the one hand, the tightening force is entirely controlled by the operator's experience, making it difficult to ensure that the torque applied each time is uniform and consistent, which can lead to differences in bolt pre-tightening and cause large fluctuations and poor repeatability of axial force detection data. On the other hand, the tightening depth depends on manual judgment, which may result in insufficient thread engagement and force slipping due to shallow tightening or excessive pre-tensioning of the bolt due to deep tightening, directly causing distortion of the axial force value. In addition, deviations occur during multiple detections, which not only affects the statistical accuracy of multiple test data but also reduces detection efficiency, failing to meet the precision and standardization requirements of engineering batch detection. SUMMARY

[0005] The technical problem to be solved by the present application is that in the prior art, manual screwing of nuts is difficult to ensure uniformity of screwing force and screwing depth, thereby affecting the accuracy of multi-group data statistics.

[0006] In order to achieve the above-mentioned purpose, the following technical scheme is adopted in the present application: A high-strength bolt detector comprises a detection table and a fixed cover fixedly installed on one side of the upper end of the detection table, a drive reducer fixedly installed on the inner side of the fixed cover, a torque sensor fixedly installed on the drive end of the drive reducer, a bolt cylinder one fixedly installed on the end of the torque sensor away from the drive reducer, a sliding rail fixedly installed on the other side of the upper end of the detection table, a bearing plate one slidingly sleeved on the outer side of the sliding rail, a screwing assembly arranged above one of the bearing plates one, a bearing plate two rotatably installed on the upper end of the other bearing plate one, and a detection assembly arranged above the bearing plate two.

[0007] The detection assembly comprises a vertical plate one fixedly connected with the bearing plate two, an outer baffle arranged on the inner side of the vertical plate one, an axial force sensor fixedly installed on one side of the vertical plate one, a threaded cylinder fixedly installed on the inner wall of the axial force sensor, an inner baffle threadedly sleeved on the outer side of the threaded cylinder, and a slot formed in the end face of the inner baffle.

[0008] The screwing assembly comprises a vertical plate two fixedly connected with the bearing plate one, a sleeve fixedly installed on one side of the vertical plate two, an insertion block fixedly installed on the end face of the sleeve, the insertion block being embedded with the slot, an arc-shaped groove formed in the inner wall of the sleeve, a torsional spring fixedly installed on one side of the vertical plate two, a bolt cylinder two fixedly installed on the end of the torsional spring away from the vertical plate two, a round convex head fixedly installed on the outer wall of the bolt cylinder two, the round convex head being located in the arc-shaped groove and slidingly abutting, a magnetic attraction cylinder fixedly installed on one side of the bolt cylinder two close to the vertical plate two, and an electromagnet fixedly installed on one side of the vertical plate two close to the bolt cylinder two, the electromagnet being magnetically attracted to the magnetic attraction cylinder in an energized state.

[0009] Preferably, the insertion block is provided with a plurality of insertion blocks, the plurality of insertion blocks are arranged in a circumferential interval around the sleeve as an axis, a plurality of slots are formed, the plurality of slots are arranged in a circumferential interval around the inner baffle as an axis, and the plurality of insertion blocks correspond to the plurality of slots one by one.

[0010] Preferably, the inner side of the outer baffle and the axial force sensor is reserved with a through hole for the bolt column to pass through, the inner side of the outer baffle is provided with a plurality of elastic members, the elastic member comprises a spring fixedly connected with the outer baffle, the end of the spring away from the outer baffle is fixedly installed with an abutting plate, and the abutting plate abuts against the outer wall of the bolt cap.

[0011] Preferably, the abutting plate is fixedly installed with a guide plate on one side, and the guide plate is arranged towards the bolt cap.

[0012] The inner side of the spring is preferably provided with a telescopic rod, one end of the telescopic rod is fixedly connected with the outer baffle, and the other end of the telescopic rod is fixedly connected with the abutting plate.

[0013] Preferably, the plurality of elastic members are arranged in a circumferential interval around the outer baffle as an axis, and the plurality of elastic members have the same structure.

[0014] Preferably, the two groups of slide rails are symmetrically installed, and the end faces of the two groups of slide rails and the inner sides of the first bearing plate and the second bearing plate are all provided with threaded grooves.

[0015] Preferably, the end of the slide rail away from the fixed cover is fixedly installed with a limiting plate, and when the first bearing plate connected with the second vertical plate gradually moves away from the fixed cover, the first bearing plate will finally abut against the limiting plate.

[0016] Preferably, the other side of the upper end of the detection table is symmetrically installed with a convex strip, the inner side of the fixed cover is slidably sleeved with a moving cover, and the moving cover is slidingly connected with the convex strip.

[0017] Preferably, the upper end of the fixed cover is fixedly installed with a controller, and the controller is electrically connected with the driving speed reducer, the torque sensor and the shaft force sensor.

[0018] The technical effects and advantages of the present application are as follows:

[0019] By replacing manual operation with a torsional spring driven screwing assembly, and combining a plurality of circumferentially distributed and one-to-one corresponding plug blocks and plug slots, the screwing force of the nut is ensured to be uniform and the depth is consistent, the shaft force data fluctuation and distortion are avoided, and the accuracy of multiple detection data is improved.

[0020] By the plurality of symmetrical elastic members on the inner side of the outer baffle, the guiding plate and the telescopic rod, the bolt cap is quickly guided, positioned and stably abutted, the clamping process is simplified, the assembly difficulty is reduced, and the subsequent operation continuity is ensured.

[0021] By the slide rail fixing structure, the limiting plate and the slidable moving cover, the displacement of the detection component, the accidental disengagement and the personnel safety risk during detection are avoided, and the safety of the device is improved. DETAILED DESCRIPTION

[0022] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts.

[0023] Figure 1 It is a front view of the overall structure of the present application.

[0024] Figure 2 It is a back view of the overall structure of the present application.

[0025] Figure 3It is a schematic diagram of the plane structure of the present application.

[0026] Figure 4 It is an exploded schematic diagram of the detection assembly structure of the present application.

[0027] Figure 5 It is an exploded and sectional schematic diagram of the shaft force sensor structure of the present application.

[0028] Figure 6 It is a schematic diagram of the elastic member structure of the present application.

[0029] Figure 7 It is a schematic diagram of the screwing assembly structure of the present application.

[0030] Figure 8 It is an exploded and sectional schematic diagram of the screwing assembly structure of the present application.

[0031] Legend: 1, detection table; 11, fixed cover; 12, movable cover; 13, limiting plate; 14, convex strip; 15, slide rail; 16, bearing plate one; 17, bearing plate two; 18, controller; 2, driving speed reducer; 3, torque sensor; 4, bolt cylinder one; 5, detection assembly; 51, vertical plate one; 52, outer baffle; 521, elastic member; 5211, spring; 5212, abutting plate; 5213, guide plate; 5214, telescopic rod; 53, shaft force sensor; 531, threaded cylinder; 532, inner baffle; 533, insertion slot; 6, screwing assembly; 61, vertical plate two; 62, sleeve; 63, insertion block; 64, arc-shaped groove; 65, electromagnet; 66, bolt cylinder two; 67, round convex head; 68, torsional spring; 69, magnetic attraction cylinder. DETAILED DESCRIPTION

[0032] It is easy to understand that, according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the following detailed description and the accompanying drawings are only exemplary description of the technical scheme of the present application, and should not be regarded as the whole or regarded as the limitation or restriction of the technical scheme of the present application.

[0033] In high-strength bolt detection, multiple detections are usually required to avoid errors caused by differences in bolt material uniformity, slight clamping deviations, environmental transient fluctuations and other accidental factors in a single detection process, in order to ensure the authority and compliance of the detection results. However, the nut is manually screwed during the detection process. On the one hand, the screwing force is controlled entirely by the experience of the operator, making it difficult to ensure that the torque applied each time is uniform and consistent, which can lead to differences in bolt pretightening, resulting in large fluctuations in axial force detection data and poor repeatability. On the other hand, the screwing depth depends on manual judgment, which may result in insufficient thread engagement and force slipping due to screwing too shallow, or the bolt may be subjected to additional pretension due to screwing too deep, directly causing distortion of the axial force value. In multiple detections, deviations occur, which not only affects the statistical accuracy of multiple test data, but also reduces the detection efficiency, and cannot meet the requirements of precision and standardization for engineering batch detection. In order to solve this problem, referring to the prior art Figure 1 Figure 5 Figure 7 Figure 8 The present application provides a technical solution: a high-strength bolt detector, comprising a detection table 1 and a fixed cover 11 fixedly installed on one side of the upper end of the detection table 1, a drive reduction machine 2 fixedly installed on the inner side of the fixed cover 11, a torque sensor 3 fixedly installed on the drive end of the drive reduction machine 2, a bolt cylinder one 4 fixedly installed on the end of the torque sensor 3 away from the drive reduction machine 2, a sliding rail 15 fixedly installed on the other side of the upper end of the detection table 1, and a bearing plate one 16 slidingly sleeved on the outer side of the sliding rail 15. One of the bearing plates one 16 is provided with a screwing assembly 6 above, and the other bearing plate one 16 is provided with a bearing plate two 17 rotatably installed on the upper end, and a detection assembly 5 is arranged above the bearing plate two 17.

[0034] The detection assembly 5 comprises a vertical plate one 51 fixedly connected with the bearing plate two 17, an outer baffle 52 arranged on the inner side of the vertical plate one 51, an axial force sensor 53 fixedly installed on one side of the vertical plate one 51, a threaded cylinder 531 fixedly installed on the inner wall of the axial force sensor 53, an inner baffle 532 threadedly sleeved on the outer side of the threaded cylinder 531, and a slot 533 formed in the end face of the inner baffle 532.

[0035] ​​​The screwing assembly 6 comprises the vertical plate two 61 fixedly connected with the bearing plate one 16, the sleeve 62 fixedly installed on one side of the vertical plate two 61, the plug 63 fixedly installed on the end face of the sleeve 62, the plug 63 embedded with the insertion slot 533, the arc-shaped recess 64 opened on the inner wall of the sleeve 62, the torsional spring 68 fixedly installed on one side of the vertical plate two 61, the bolt cylinder two 66 fixedly installed on the end of the torsional spring 68 away from the vertical plate two 61, the round convex head 67 fixedly installed on the outer wall of the bolt cylinder two 66, the round convex head 67 located in the arc-shaped recess 64 and slidingly abutting, the magnetic attraction cylinder 69 fixedly installed on one side of the bolt cylinder two 66 close to the vertical plate two 61, the electromagnet 65 fixedly installed on one side of the vertical plate two 61 close to the bolt cylinder two 66, the electromagnet 65 magnetically attracted with the magnetic attraction cylinder 69 in the electrified state, firstly rotating the bearing plate two 17 to make it cross with the bearing plate one 16, then inserting the bolt cap into the inner side of the outer baffle 52 by hand, axially fixing it by the outer baffle 52, then rotating the bearing plate two 17 again to make it overlap with the bearing plate one 16, then screwing the inner baffle 532 for a certain number of turns, since the inner baffle 532 is screwed with the threaded cylinder 531, the inner baffle 532 is axially horizontally moved, the number of turns is not fixed, only the number of turns is remembered and the insertion slot 533 on the end face is corresponded with the plug 63, then the washer is sleeved on the outer side of the bolt column and the nut is placed in the inner side of the bolt cylinder two 66 and pressed to make the nut push the bolt cylinder two 66 gradually into the sleeve 62, in the process, the arc-shaped recess 64 guides the round convex head 67 to make the bolt cylinder two 66 rotate synchronously in the moving process, thus compressing and twisting the torsional spring 68, until the magnetic attraction cylinder 69 is magnetically attracted with the electromagnet 65 in the electrified state, then the pressing is released, then the two groups of bearing plates one 16 are pushed to slide on the slide rail 15 to make the bolt cap enter the inner side of the bolt cylinder one 4 and the sleeve 62 is sleeved on the outer side of the bolt to make the plug 63 inserted into the insertion slot 533, thus the inner baffle 532 temporarily loses the rotating ability, then the electromagnet 65 is de-energized to lose the magnetic attraction with the magnetic attraction cylinder 69, since the torsional spring 68 is in the twisted and compressed state, a restoring force and a twisting force are generated on the bolt cylinder two 66, thus in the subsequent restoring process, the nut is screwed on the outer side of the bolt column and cooperates with the inner baffle 532 to clamp the washer therebetween, thus the simulation effect is realized, that is, the axial force sensor 53, the vertical plate one 51 and the outer baffle 52 are regarded as a whole, which is equivalent to the object fixed by the bolt in the normal use process, finally the driving speed reducer 2 is started to apply the torque force on the torque sensor 3 and the bolt cylinder one 4, the axial force and the torque force are generated between the bolt column and the nut by the threaded relationship therebetween, the axial force and the torque force are detected and recorded by the torque sensor 3 and the axial force sensor 53, thus one detection is completed, in the subsequent multiple detections, only the above operation is repeated.By using the reset thrust and torsional force to realize the screwing of the nut, manual operation is replaced, the axial force data fluctuation caused by uneven screwing force is avoided, the screwing depth during each detection is synchronized, the axial force value distortion problem caused by manual depth judgment is solved, the statistical accuracy of multiple detection data is improved, the detection efficiency is improved, the accuracy and standardization requirements of engineering batch detection are met, the automation and standardization of nut screwing are realized.

[0036] In the connecting process, in order to make the stress uniform after connection to improve stability, referring to Figure 5 、 Figure 7 , in the embodiment: a plurality of plug blocks 63 are arranged in a circumferential interval around the sleeve 62, a plurality of plug slots 533 are arranged in a circumferential interval around the inner baffle 532, and the plurality of plug blocks 63 correspond to the plurality of plug slots 533 one by one. It is ensured that the plug block 63 and the plug slot 533 are accurately positioned when they are embedded, which greatly reduces the assembly difficulty and improves the operation convenience. Through the multi-point type of circumferential uniform distribution, the stability and stress balance during connection are enhanced, additional torque is effectively avoided during detection due to relative displacement or uneven stress of the two, and the accuracy of the axial force and torque detection data is ensured.

[0037] When placing the bolt cap, in order to be able to preliminarily fix it, facilitate subsequent operation, referring to Figure 4 、 Figure 6 , in the embodiment: a through hole is reserved on the inner side of the outer baffle 52 and the axial force sensor 53 for the bolt column to pass through, a plurality of elastic members 521 are arranged on the inner side of the outer baffle 52, the elastic member 521 includes a spring 5211 fixedly connected with the outer baffle 52, a abutting plate 5212 is fixedly installed on the end of the spring 5211 away from the outer baffle 52, the abutting plate 5212 abuts against the outer wall plane of the bolt cap, when installing the bolt, the diameter of the bolt cap forces the abutting plate 5212 to compress the spring 5211, and then the reset thrust generated by the compression of the spring 5211 is used to push the abutting plate 5212 to abut against the bolt cap, realizing the preliminary fixation of the bolt cap during placement, effectively avoiding displacement or dumping, providing a stable foundation for subsequent adjustment, alignment and other operations, reducing assembly difficulty and improving operation continuity. Without additional fixing steps, the clamping process in the early detection stage is simplified, and the detection efficiency and operation convenience are improved.

[0038] When placing the bolt cap, in order to make the bolt cap quickly enter the abutting plate 5212 facing position, referring to Figure 6As shown, in the embodiment: the abutting plate 5212 is fixedly installed on one side of the guide plate 5213, which is arranged towards the bolt cap, and can guide the bolt cap when placing the bolt cap, helping the bolt cap to be quickly and accurately embedded in the preset position, simplifying the clamping operation process and reducing the time-consuming of the early assembly.

[0039] Referring to Figure 6 As shown, in the embodiment: the inner side of the spring 5211 is provided with a telescopic rod 5214, one end of the telescopic rod 5214 is fixedly connected with the outer baffle 52, and the other end of the telescopic rod 5214 is fixedly connected with the abutting plate 5212. The telescopic rod 5214 can provide accurate guidance for the telescopic movement of the spring 5211, avoid the spring 5211 from deviating or twisting when being compressed or reset, ensure that the abutting plate 5212 always maintains a stable abutting state, and enhance the structural stability of the elastic member 521 to provide reliable support for the preliminary fixing of the bolt cap.

[0040] Referring to Figure 6 As shown, in the embodiment: a plurality of groups of elastic members 521 are arranged in a circumferential interval around the outer baffle 52, and the structural compositions of the plurality of groups of elastic members 521 are completely same. The plurality of groups of elastic members 521 can apply abutting force from the circumferential multiple evenly distributed points of the bolt cap, ensure that the bolt cap is balanced and centrally positioned, avoid deviation or inclination caused by unilateral force, and simultaneously ensure that the elastic coefficient and telescopic performance of each group of elastic members 521 are consistent through unified structural design, so that the preliminary fixing effect of the bolt cap has repeatability and stability, providing a unified reference state for subsequent clamping steps, improving the standardization degree of clamping in multiple detections, and further ensuring the accuracy of detection data.

[0041] Referring to Figure 2 - Figure 3 As shown, in the embodiment: two groups of slide rails 15 are symmetrically installed, and the end faces of the two groups of slide rails 15, the inner sides of the bearing plate one 16 and the bearing plate two 17 are all provided with threaded grooves. During the detection process, when the positions of the bearing plate one 16 and the bearing plate two 17 are determined, they can be fixed through bolts, avoiding accidents during the detection process.

[0042] Referring to Figure 2 As shown, in the embodiment: the end of the slide rail 15 away from the fixed cover 11 is fixedly installed with a limiting plate 13. When the bearing plate one 16 connected with the vertical plate two 61 gradually moves away from the fixed cover 11, it will finally abut against the limiting plate 13, so that accidents can be effectively avoided during use, and the device is protected.

[0043] Referring to Figure 3As shown in the embodiment: the other side of the upper end of the detection table 1 is symmetrically provided with a convex strip 14, the inner side of the fixed cover 11 is slidably sleeved with a moving cover 12, the moving cover 12 is slidably connected with the convex strip 14, and in the contact process, the moving cover 12 is pulled to slide on the convex strip 14, so that the screwing assembly 6 and the detection assembly 5 are covered, and the safety of the personnel is ensured.

[0044] With reference to Figure 3 As shown in the embodiment: the upper end of the fixed cover 11 is fixedly provided with a controller 18, the controller 18 is electrically connected with the driving speed reducer 2, the torque sensor 3 and the shaft force sensor 53, can automatically receive and process torque and shaft force detection data, improve the timeliness and accuracy of data acquisition, and can accurately control the running state of the driving speed reducer 2, realize the automation and standardization of torque application, and improve the batch detection efficiency.

[0045] Working principle: first, the bearing plate two 17 is rotated, make it with bearing plate one 16 cross state, then hand bolt cap is inserted into the inner side of outer baffle 52, utilize outer baffle 52 to its axial fixed, then rotate bearing plate two 17 again, make it with bearing plate one 16 overlap state, then screw inner baffle 532 a certain number of turns, because inner baffle 532 with threaded barrel 531 threaded connection, in turn make inner baffle 532 axial horizontal movement, screw number is not fixed, just remember the number and make its end face slot 533 with plug 63 corresponding, subsequently, washer is set in the outer side of bolt column, and nut is placed in the inner side of bolt cylinder two 66, and the nut is pressed, make the nut push bolt cylinder two 66 gradually into the sleeve 62 inside, and in the process, arc-shaped recess 64 to round convex head 67 play a guiding effect, force bolt cylinder two 66 synchronous rotation in the moving process, in turn produce compression to torsional spring 68 while making it torsion, until the magnetic attraction cylinder 69 and electromagnet 65 under the condition of energized magnetic attraction, at this time, the press can be released, then push two groups of bearing plate one 16 on the slide rail 15 sliding, make bolt cap into the inner side of bolt cylinder one 4, and sleeve 62 is set on the outer side of bolt, make plug 63 insert into the slot 533, force inner baffle 532 temporarily lose the ability of rotation, at this time, the electromagnet 65 is de-energized, lose the magnetic attraction with magnetic attraction cylinder 69, at the same time, because torsional spring 68 is in torsion and compression state, in turn produce a reset push force and torsion to bolt cylinder two 66, in turn in the subsequent reset process, the nut is screwed on the outer side of bolt column, and with inner baffle 532 form cooperation and washer is clamped between them, so as to realize the simulation effect, that is, at this time, the axial force sensor 53 and vertical plate one 51 and outer baffle 52 can be regarded as a whole, the whole is equivalent to the object fixed between the bolt in the normal use process, finally, the driving reducer 2 is started to the torque sensor 3 and bolt cylinder one 4 and applies torque, by utilizing the threaded relationship between the bolt column and the nut, make the axial force and torque between them, by torque sensor 3 and axial force sensor 53 and record, complete a detection, and in subsequent multiple detection, just repeat the above operation.

[0046] The technical scope of the present application is not limited to the above description, and those skilled in the art can make various modifications and modifications to the above embodiments without departing from the technical idea of the present application, and these modifications and modifications shall belong to the protection scope of the present application.

Claims

1. A high-strength bolt testing instrument, characterized in that, The device includes a testing platform and a fixed cover fixedly installed on one side of its upper end. A drive reducer is fixedly installed on the inner side of the fixed cover. A torque sensor is fixedly installed on the drive end of the drive reducer. A bolt cylinder is fixedly installed on the end of the torque sensor away from the drive reducer. A slide rail is fixedly installed on the other side of the upper end of the testing platform. A bearing plate is slidably sleeved on the outer side of the slide rail. A screwing assembly is provided above one of the bearing plates. A second bearing plate is rotatably installed on the upper end of the other bearing plate. A testing assembly is provided above the second bearing plate. The detection component includes a vertical plate 1 fixedly connected to the second support plate. An outer baffle is provided on the inner side of the vertical plate 1. An axial force sensor is fixedly installed on one side of the vertical plate 1. A threaded cylinder is fixedly installed on the inner wall of the axial force sensor. An inner baffle is threaded on the outer side of the threaded cylinder. A slot is provided on the end face of the inner baffle. The screwing assembly includes a second vertical plate fixedly connected to the first support plate. A sleeve is fixedly installed on one side of the second vertical plate, and an insert is fixedly installed on the end face of the sleeve. The insert engages with the slot. An arc-shaped groove is formed on the inner wall of the sleeve. A torsion spring is fixedly installed on one side of the second vertical plate. A bolt cylinder is fixedly installed on the end of the torsion spring away from the second vertical plate. A round protrusion is fixedly installed on the outer wall of the bolt cylinder. The round protrusion is located in the arc-shaped groove and slides against it. A magnetic suction cylinder is fixedly installed on the side of the bolt cylinder near the second vertical plate. An electromagnet is fixedly installed on the side of the second vertical plate near the bolt cylinder. When energized, the electromagnet is magnetically attracted to the magnetic suction cylinder.

2. The high-strength bolt testing instrument according to claim 1, characterized in that: The inserts are provided in multiple ways, and the multiple inserts are arranged in a circular interval with the sleeve as the axis. The slots are provided in multiple sets, and the multiple sets of slots are arranged in a circular interval with the inner baffle as the axis. The multiple inserts correspond one-to-one with the multiple sets of slots.

3. The high-strength bolt testing instrument according to claim 1, characterized in that: Both the outer baffle and the axial force sensor have through holes reserved on their inner sides for the bolt to pass through. The inner side of the outer baffle is provided with multiple sets of elastic elements, including a spring fixedly connected to the outer baffle. An abutment plate is fixedly installed at the end of the spring away from the outer baffle, and the abutment plate abuts against the outer wall plane of the bolt head.

4. A high-strength bolt testing instrument according to claim 3, characterized in that: A guide plate is fixedly installed on one side of the abutment plate, and the guide plate is positioned facing the bolt cap.

5. A high-strength bolt testing instrument according to claim 4, characterized in that: A telescopic rod is provided on the inner side of the spring. One end of the telescopic rod is fixedly connected to the outer baffle, and the other end of the telescopic rod is fixedly connected to the abutment plate.

6. A high-strength bolt testing instrument according to claim 3, characterized in that: Multiple sets of elastic elements are arranged in a circular interval with the outer baffle as the axis, and the structural composition of the multiple sets of elastic elements is exactly the same.

7. A high-strength bolt testing instrument according to claim 1, characterized in that: Two sets of slide rails are symmetrically installed, and threaded grooves are opened on the end face of the two sets of slide rails, the inner side of the first bearing plate and the second bearing plate.

8. A high-strength bolt testing instrument according to claim 1, characterized in that: A limiting plate is fixedly installed at the end of the slide rail away from the fixed cover. As the bearing plate connected to the second vertical plate gradually moves away from the fixed cover, it will eventually abut against the limiting plate.

9. A high-strength bolt testing instrument according to claim 1, characterized in that: A convex strip is symmetrically installed on the other side of the upper end of the testing platform, and a movable cover is slidably sleeved on the inner side of the fixed cover, with the movable cover and the convex strip engaging and slidingly connected.

10. A high-strength bolt testing instrument according to claim 1, characterized in that: A controller is fixedly installed on the upper end of the fixed cover. The controller is electrically connected to the drive reducer, the torque sensor, and the axial force sensor.

Images