Fastener strength testing device

Abstract

The present invention relates to the technical field of fastener strength detection devices, and specifically, to a fastener strength detection device, including a placement platform for placing and detecting fasteners and a visual image processing module for realizing real-time analysis and processing of the stress conditions on the surface of the fasteners, a plurality of protective shells are fixedly connected to the placement platform, each of the protective shells is connected to a connecting sleeve, two limit columns are fixedly connected to the placement platform, a transmission plate is slidably connected to the two limit columns, a lifting cylinder is fixedly connected between the two limit columns, and the lifting cylinder is fixedly connected to the placement platform. Through the above technical scheme, the practicability of the equipment is improved, and more complete shear resistance data is obtained, thereby ensuring the reliability of the fasteners in actual work, and enabling the fasteners to be tested in multiple batches, which improves the detection efficiency of the equipment, reduces the labor intensity of workers, and increases the reliability and safety of the overall system.

Description

Technical Field

[0001] The present invention relates to the technical field of fastener strength detection devices, and in particular to a fastener strength detection device. Background Art

[0002] Fasteners are mechanical parts used to fasten two or more components together. They are widely used in various mechanical equipment, building structures, automobiles, electronic products and other fields. Common types of fasteners include screws, nuts, bolts, washers, pins, rivets, etc. Fasteners firmly connect components together through threaded connections, crimping, riveting, etc. to ensure the stability and safety of the equipment. Strength testing of fasteners is a key step to ensure that they can withstand loads and maintain reliability in actual use. Common testing methods include tensile tests, torque tests, shear tests, etc. The specific testing methods and standards will vary depending on the type, material and use environment of the fasteners. Through these tests, the safety, durability and performance stability of fasteners in use can be ensured, and structural failures caused by insufficient strength can be avoided.

[0003] In the prior art, a common method for detecting the shear force of fasteners is to thread the fasteners to simulate their use in a real working environment. Then, a shear force is applied to the connected fasteners, usually in only one direction. In this process, a high-definition camera in a visual image processing device is used to capture the deformation of the fasteners under force, thereby obtaining relevant data on the shear force strength. However, this method has certain limitations. First, the shear force only acts in a single direction and cannot fully reflect the various complex mechanical environments that fasteners may face in actual applications. In many engineering applications, fasteners may be subjected to shear forces in multiple directions at the same time, and existing tests cannot effectively evaluate their comprehensive performance under shear forces in different directions. Therefore, users cannot fully understand the true performance of fasteners under multiple stress conditions, and it is difficult to ensure their reliability in actual work. Secondly, current testing equipment can generally only detect a single fastener, which means that for mass-produced fasteners, multiple devices are often required to perform different tests separately. This not only increases equipment investment and maintenance costs, but also reduces the overall testing efficiency. In addition, since each device can usually only test a specific type of load or a single parameter, the applicability of the device is limited.

[0004] Therefore, the existing technology has deficiencies in fastener shear force testing and is unable to provide a comprehensive and accurate strength assessment. It also leads to inefficiency and high cost in the testing process, limiting the widespread application of the equipment. Summary of the invention

[0005] The present invention proposes a fastener strength detection device, which improves the practicability of the equipment and obtains more complete shear resistance data, thereby ensuring the reliability of the fasteners in actual work, and enables the fasteners to be tested in multiple batches, thereby improving the detection efficiency of the equipment, reducing the labor intensity of workers, and increasing the reliability and safety of the overall system.

[0006] The technical solution of the present invention is as follows:

[0007] A fastener strength detection device, comprising a placement platform for placing and detecting fasteners and a visual image processing module for performing real-time analysis and processing of the stress conditions on the surface of the fasteners, characterized in that;

[0008] A plurality of protective shells are fixedly connected to the placement platform, and a coupling sleeve is connected to each of the protective shells;

[0009] Two limit columns are fixedly connected to the placement platform, a transmission plate is slidably connected to the two limit columns, a lifting cylinder is fixedly connected between the two limit columns, the lifting cylinder is fixedly connected to the placement platform, and the telescopic shaft of the lifting cylinder is fixedly connected to the lower side of the transmission plate;

[0010] A driving component for applying force to the fastener strength test is connected between the transmission plate and each protective shell, and the driving component includes a plurality of locking sleeves and a receiving plate. A locking groove is provided on the lower side of each locking sleeve, and each of the locking grooves has the same shape as a fastener with different outer diameters. An adjusting nut for adjusting the distance between the axis of the locking sleeve and the axis of the receiving plate is connected between the locking sleeve and the receiving plate, and the receiving plate is used to drive the locking sleeve to rotate.

[0011] Furthermore, each positioning sleeve is slidably connected to each receiving plate, and a support plate is fixedly connected to the upper side of each receiving plate, and the adjusting nut is rotatably connected to the support plate, and an adjusting block is threadedly connected to the adjusting nut;

[0012] An adjustment slot is provided on the receiving plate, and each of the adjustment blocks is rotatably connected with a receiving column, each of the receiving columns abuts against the inner wall of the adjacent adjustment slot, and the lower end of each receiving column is fixedly connected to the adjacent positioning sleeve;

[0013] A coupling disc is fixedly connected to the upper side of each receiving disc, each coupling disc is rotatably connected to the lower side of the transmission plate, each coupling disc is coaxially fixedly connected to a first synchronous wheel, a second synchronous wheel is rotatably connected to the upper side of the transmission plate, a first synchronous belt is meshed on the second synchronous wheel and a plurality of first synchronous wheels, a first motor is fixedly connected to the lower side of the transmission plate, and a driving shaft of the first motor is coaxially fixedly connected to the second synchronous wheel;

[0014] Each of the connecting sleeves is connected with a locking assembly that cooperates with each locking sleeve to limit each fastener.

[0015] Further, the positioning assembly includes a limiting plate, a plurality of reset grooves are formed on the limiting plate, a positioning column is slidably connected to the inner wall of each reset groove, a positioning block is hingedly connected to the upper end of each positioning column, a positioning stud is clamped between the plurality of positioning blocks, and the positioning stud is threadedly connected to the fastener;

[0016] The limiting plate is provided with a sliding groove, the inner wall of the sliding groove is abutted with a reset column, the lower end of each reset column is rotatably connected with a first clamping terminal, the limiting plate is annularly fixedly connected with a plurality of second clamping terminals around the axis of the limiting plate, and a reset tension spring is clamped between each of the first clamping terminals and the second clamping terminals on one side;

[0017] The upper end of the reset column is fixedly connected with a reset plate, and the reset plate is hinged with a force transmission plate, and one end of each force transmission plate away from the reset plate is hinged with an adjacent clamping block.

[0018] Furthermore, a limiting groove is provided on the positioning block, and a limiting block is fixedly connected to the outer side of the positioning stud, and the limiting block abuts against the inner wall of the limiting groove.

[0019] Furthermore, a transmission column sleeve is rotatably connected to the lower side of the connecting sleeve, and the transmission column sleeve is rotatably connected in the protective shell. The transmission column sleeve is fixedly connected to a transmission gear toward the outside of the protective shell, and several of the transmission gears are meshed with adjustment racks on the lower sides, and the adjustment racks are slidably connected to the side of the placement table.

[0020] Furthermore, the transmission column sleeve is rotatably connected to two connecting sleeves, and the two connecting sleeves are arranged in a ring shape with the axis of the transmission column sleeve as the center.

[0021] Furthermore, each connecting sleeve outer ring is fixedly connected with a screw-out gear, each protective shell is rotatably connected with an adjusting gear, each adjusting gear is coaxially fixedly connected with a third synchronous wheel on the lower side, a fourth synchronous wheel is rotatably connected with the lower side of the placement platform, a second synchronous belt is meshed with the fourth synchronous wheel and several third synchronous wheels, a second motor is fixedly connected to the side wall of the lower side of the placement platform, and the drive shaft of the second motor is coaxially fixedly connected with the fourth synchronous wheel.

[0022] Furthermore, both sides of each protective shell are fixedly connected with a resistance plate.

[0023] Furthermore, a receiving ring is detachably fixedly connected inside the connecting sleeve.

[0024] The beneficial effects of the present invention are:

[0025] After the test is completed, the transmission plate can be lifted up by the lifting cylinder, so that the user can more intuitively observe the appearance of the fastener after the test. Similarly, the lifting cylinder can also press down the transmission plate so that several fasteners can be subjected to pressure, and then the compressive strength of the fasteners can be detected, which improves the practicality of the equipment;

[0026] The drive component adjusts the strength of the shear force of the fastener, so that the connected fasteners are subjected to shear forces in multiple directions, thereby obtaining more complete shear resistance data of the fastener, allowing users to have a more comprehensive understanding of the true performance of the fastener under shear force conditions in multiple directions, thereby ensuring the reliability of the fastener in actual work, and enabling the fastener to be tested in multiple batches, thereby improving the detection efficiency of the equipment, reducing the labor intensity of workers, and increasing the reliability and safety of the overall system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] Figure 1 This is an enlarged schematic diagram of the present invention. Figure 1 ;

[0029] Figure 2 for Figure 1 A is an enlarged schematic diagram;

[0030] Figure 3 This is an enlarged schematic diagram of the present invention. Figure 2 ;

[0031] Figure 4 This is a partial explosion enlargement diagram of the present invention. Figure 1 ;

[0032] Figure 5 This is a partial explosion enlargement diagram of the present invention. Figure 2 ;

[0033] Figure 6 for Figure 5 A magnified schematic diagram of B;

[0034] Figure 7 for Figure 5 A magnified schematic diagram of middle C;

[0035] Figure 8 This is a partial explosion enlargement diagram of the present invention. Figure 3 ;

[0036] Fig. 9 This is a partial enlarged schematic diagram of the present invention. Figure 1 ;

[0037] Fig.10 This is a partial enlarged schematic diagram of the present invention. Figure 2 ;

[0038] Fig.11 This is a partial enlarged schematic diagram of the present invention. Figure 3 .

[0039] In the figure: 11, fastener; 12, placement table; 14, protective shell; 15, connecting sleeve; 151, receiving ring; 16, limiting column; 17, transmission plate; 18, lifting cylinder; 21, positioning sleeve; 22, positioning groove; 23, receiving plate; 231, adjustment groove; 24, support plate; 25, adjustment nut; 26, adjustment block; 261, receiving column; 27, connecting plate; 28, first synchronous wheel; 29, second synchronous wheel; 210, first synchronous belt; 211, first motor; 31, limiting plate; 32, reset groove ; 33. Positioning column; 34. Positioning block; 341. Limiting groove; 35. Positioning stud; 351. Limiting block; 36. Sliding groove; 37. Reset column; 38. First positioning terminal; 39. Second positioning terminal; 310. Reset tension spring; 311. Reset plate; 312. Force transmission plate; 41. Transmission column sleeve; 42. Transmission gear; 43. Adjustment rack; 51. Unscrew gear; 52. Adjustment gear; 53. Third synchronous wheel; 54. Fourth synchronous wheel; 55. Second synchronous belt; 56. Second motor; 57. Force resistance plate. DETAILED DESCRIPTION

[0040] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Example 1

[0042] like Figure 1 to Figure 11 As shown, this embodiment proposes a fastener strength detection device, including a placement table 12 for placing and detecting the fastener 11 and a visual image processing module for performing real-time analysis and processing of the surface stress condition of the fastener 11;

[0043] A plurality of protective shells 14 are fixedly connected to the placement platform 12, and each coupling sleeve 15 is connected inside each protective shell 14;

[0044] The two limit posts 16 are fixedly connected to the placement platform 12, the transmission plate 17 is slidably connected to the two limit posts 16, a lifting cylinder 18 is fixedly connected between the two limit posts 16, the lifting cylinder 18 is fixedly connected to the placement platform 12, and the telescopic shaft of the lifting cylinder 18 is fixedly connected to the lower side of the transmission plate 17;

[0045] A driving assembly for applying force to the strength test of the fastener 11 is connected between the transmission plate 17 and each protective housing 14;

[0046] After the test is completed, the transmission plate 17 can be lifted by the lifting cylinder 18, so that the user can more intuitively observe the appearance of the fastener 11 after the test. Similarly, the lifting cylinder 18 can also press the transmission plate 17 downward, so that a number of fasteners 11 can be subjected to pressure, and then the compressive strength of the fastener 11 can be detected, thereby improving the practicality of the equipment;

[0047] The driving component adjusts the strength of the shear force of the fastener 11, so that the connected fastener 11 is subjected to shear forces in multiple directions, thereby obtaining more complete shear resistance data of the fastener 11, allowing users to have a more comprehensive understanding of the true performance of the fastener 11 under shear force conditions in multiple directions, thereby ensuring the reliability of the fastener 11 in actual work, and enabling the fastener 11 to be tested in multiple batches, thereby improving the detection efficiency of the equipment, reducing the labor intensity of workers, and increasing the reliability and safety of the overall system.

[0048] like Figure 1~Figure 3 and Fig.10 As shown, the driving assembly includes a plurality of locking sleeves 21, and each locking groove 22 is provided on the lower side of each locking sleeve 21, and each locking groove 22 has the same shape as the fastener 11 of different outer diameters;

[0049] Each receiving plate 23 is slidably connected to each positioning sleeve 21, each supporting plate 24 is fixedly connected to the upper side of each receiving plate 23, and each adjusting nut 25 is rotatably connected to each supporting plate 24, and each adjusting nut 25 is threadedly connected to each adjusting block 26;

[0050] The adjustment groove 231 is formed on the receiving plate 23, each adjustment block 26 is rotatably connected to each receiving column 261, each receiving column 261 abuts against the inner wall of the adjacent adjustment groove 231, and the lower end of each receiving column 261 is fixedly connected to the adjacent positioning sleeve 21;

[0051] The coupling discs 27 are respectively fixedly connected to the upper side of each receiving disc 23, each coupling disc 27 is rotatably connected to the lower side of the transmission plate 17, each coupling disc 27 is coaxially fixedly connected to each first synchronous wheel 28, the second synchronous wheel 29 is rotatably connected to the upper side of the transmission plate 17, the first synchronous belt 210 is meshed with the second synchronous wheel 29 and a plurality of first synchronous wheels 28, the first motor 211 is fixedly connected to the lower side of the transmission plate 17, and the driving shaft of the first motor 211 is coaxially fixedly connected to the second synchronous wheel 29;

[0052] A locking assembly that cooperates with each locking sleeve 21 to limit each fastener 11 is connected in each connecting sleeve 15;

[0053] The positioning assembly is used to limit the lower end of the fastener 11, so that when it cooperates with the driving assembly for strength testing, it can stably measure more accurate measurement data, and at the same time, the fastener 11 can be quickly installed or disassembled, reducing the labor intensity of workers.

[0054] like Figure 5~Figure 8 and Fig.11 As shown, the positioning assembly includes a limiting plate 31, a plurality of reset grooves 32 are provided on the limiting plate 31, each positioning column 33 is slidably connected to the inner wall of each reset groove 32, the upper end of each positioning column 33 is hinged to each positioning block 34, the positioning stud 35 is clamped between the plurality of positioning blocks 34, and the positioning stud 35 is threadedly connected to the fastener 11;

[0055] The sliding groove 36 is provided on the limiting plate 31, the reset column 37 abuts against the inner wall of the sliding groove 36, the first clamping terminal 38 is rotatably connected to the lower end of the reset column 37, and a plurality of second clamping terminals 39 are all annularly fixedly connected to the limiting plate 31 with the axis of the limiting plate 31 as the center, and the reset tension spring 310 is connected between each first clamping terminal 38 and the second clamping terminal 39 on one side;

[0056] The upper end of the reset column 37 is fixedly connected to the reset plate 311, the reset plate 311 is hinged to the force transmission plate 312, and one end of each force transmission plate 312 away from the reset plate 311 is hinged to the adjacent positioning block 34;

[0057] The worker can adjust the distance between the axis of the positioning sleeve 21 and the axis of the receiving plate 23 by rotating the adjusting nut 25, so that when the receiving plate 23 rotates, the positioning sleeve 21 is driven to rotate in a ring shape with the axis of the receiving plate 23 as the center, so that the connected fastener 11 is subjected to shear forces in multiple directions, and then the fastener 11 under the detection action is detected in real time through the high-definition camera in the visual image processing module, so as to obtain more complete shear resistance data of the fastener 11, so that the user can have a more comprehensive understanding of the real performance of the fastener 11 under shear force conditions in multiple directions, thereby ensuring the reliability of the fastener 11 in actual work;

[0058] When the fastener 11 is subjected to the pulling force of the upper end of the locking sleeve 21, the fastener 11 and the locking stud 35 at the lower end will move synchronously together. At this time, the locking block 34 limits the moving range of the locking stud 35 to prevent the locking stud 35 from being offset or unstable during the movement, thereby ensuring that the locking stud 35 can work normally according to the predetermined trajectory and avoid affecting the overall performance of the device due to offset. When there is no external force, the locking block 34 can be automatically reset by the action of the reset spring 310. The reset spring 310 provides a restoring force for the locking block 34, so that the locking block 34 can be restored to its original position when there is no external force. This design not only ensures that the locking stud 35 maintains the correct position and stability during the working process, but also simplifies the operation through the automatic reset function of the reset spring 310, reduces the need for manual intervention, effectively reduces the risk of equipment failure caused by the offset of the locking stud 35, and increases the reliability and safety of the overall system.

[0059] like Figure 5~Figure 8 and Fig.11 As shown, the limiting groove 341 is formed on the positioning block 34, the limiting block 351 is fixedly connected to the outside of the positioning stud 35, and the limiting block 351 abuts against the inner wall of the limiting groove 341;

[0060] The contact area between the positioning block 34 and the positioning stud 35 is increased by the abutment relationship between the limiting block 351 and the inner wall of the limiting groove 341, thereby effectively improving the connection strength between them. This design ensures that the positioning block 34 can better cooperate with the positioning stud 35, and increases the stability between the two. Especially when subjected to shear force, the positioning block 34 can ensure the performance of its limiting function through close cooperation with the positioning stud 35, and when the positioning stud 35 is subjected to shear force, it can be limited by a single or multiple positioning blocks 34. This limiting mechanism ensures that the positioning stud 35 will not be displaced or damaged due to excessive force during operation, so that the positioning stud 35 can work and be used stably.

[0061] like Figure 5 As shown, the receiving ring 151 is detachably fixedly connected in the connecting sleeve 15;

[0062] Through the receiving ring 151, when the fastener 11 is subjected to the shear strength test, the interaction force generated between the fastener and the connecting sleeve 15 during the test can be effectively borne by the receiving ring 151. In this way, the receiving ring 151 plays a key role in the test process, replacing the connecting sleeve 15 to directly bear these forces, thereby reducing the wear of the connecting sleeve 15. Since the receiving ring 151 can withstand a large force, the service life of the connecting sleeve 15 is extended. The receiving ring 151 is fixed in the connecting sleeve 15 by bolt and nut connection. This connection method is not only stable and reliable, but also convenient for later replacement and maintenance. If the surface of the receiving ring 151 is worn or damaged, the worker only needs to loosen the bolts and nuts to easily replace the receiving ring 151 without replacing the entire connecting sleeve 15. This design greatly reduces the maintenance cost of the equipment and reduces unnecessary expenses caused by wear.

[0063] like Figure 1 and Figure 5 As shown, the transmission column sleeve 41 is rotatably connected to the lower side of the coupling sleeve 15, the transmission column sleeve 41 is rotatably connected in the protective housing 14, the transmission column sleeve 41 is fixedly connected to the transmission gear 42 toward the outside of the protective housing 14, the lower sides of the transmission gears 42 are meshed with the adjustment racks 43, and the adjustment racks 43 are slidably connected to the side of the placement platform 12;

[0064] Through the meshing of the transmission gear 42 and the adjustment rack 43, the flipping action of the transmission column sleeve 41 can effectively tilt the coupling sleeve 15 equipped with the fastener 11 to one side, which makes it easier for workers to remove the fastener 11 during operation. Through this tilting design, workers will not interfere with the transmission plate 17 on the upper side during the operation, thereby reducing the risk of accidental touch during operation and avoiding interference with the detection equipment. That is, workers can complete the removal of the fastener 11 on both sides of the coupling sleeve 15, which not only improves work efficiency, but also improves the safety of operation and avoids unnecessary risks and labor intensity.

[0065] Example 2

[0066] This example improves the number of coupling sleeves 15 based on Example 1.

[0067] like Figure 3~Figure 7 As shown, the transmission column sleeve 41 is rotatably connected with two connecting sleeves 15, and the two connecting sleeves 15 are arranged in a ring shape with the axis of the transmission column sleeve 41 as the center;

[0068] When two coupling sleeves 15 are used to operate in sequence, the detection efficiency of the fastener 11 can be significantly improved. In this operation mode, when a single coupling sleeve 15 is equipped with a fastener 11 for strength testing, the other coupling sleeve 15 can prepare the second batch of fasteners 11 in advance. After the fasteners 11 in the first coupling sleeve 15 are tested, the worker can quickly switch to the second batch of fasteners 11 for testing, thereby improving the detection efficiency. In addition, after the first fastener 11 is tested, the worker can quickly remove the overturned fastener 11. This design greatly improves the continuity and smoothness of the fastener detection process and avoids pauses caused by waiting for idle time. Through the design of this double coupling sleeve, workers can achieve "front and back connection" when performing fastener testing, which reduces waiting time on the one hand and optimizes the operation process on the other hand. This operation mode not only improves work efficiency, but also reduces the labor intensity of workers. During the waiting period, workers can concentrate on preparing the next batch of fasteners without frequent disassembly and assembly operations, thereby reducing repetitive labor and improving overall production efficiency and workers' work experience.

[0069] Example 3

[0070] This embodiment improves the removal or installation method of the fastener 11 based on the embodiment 2.

[0071] like Figure 3~Figure 7 As shown, each unscrewing gear 51 is fixedly connected to the outer ring of each connecting sleeve 15, the adjusting gear 52 is rotatably connected in each protective shell 14, the lower side of each adjusting gear 52 is coaxially fixedly connected to each third synchronous wheel 53, the fourth synchronous wheel 54 is rotatably connected to the lower side of the placement platform 12, the second synchronous belt 55 is meshed with the fourth synchronous wheel 54 and the plurality of third synchronous wheels 53, the second motor 56 is fixedly connected to the lower side wall of the placement platform 12, and the driving shaft of the second motor 56 is coaxially fixedly connected to the fourth synchronous wheel 54;

[0072] When the coupling sleeve 15 equipped with the fastener 11 falls to one side, the screw-out gear 51 on the coupling sleeve 15 will automatically mesh with the adjusting gear 52. The function of this meshing mechanism is to accurately control the rotation of the coupling sleeve 15 by transmitting power. The worker only needs to drive the second motor 56, and by adjusting the rotation of the second motor 56 to drive the screw-out gear 51 and the adjusting gear 52 to mesh, thereby driving the further movement of the coupling sleeve 15, so that the threaded fastener 11 can be quickly installed or removed, reducing the labor intensity of the workers.

[0073] Example 4

[0074] This embodiment further improves the fastener 11 on the basis of the embodiment 3 and the method of removing or installing the fastener 11

[0075] like Figure 1~Figure 4 As shown, two resistance plates 57 are fixedly connected to both sides of the protective shell 14;

[0076] Through the resistance plate 57, when the retaining stud 35 threadedly connected to the fastener 11 is tipped to one side along with the connecting sleeve 15, the end of the fastener 11 away from the retaining stud 35 will come into contact with the resistance plate 57, and then the connecting sleeve 15 is driven to separate the threaded connection of the fastener 11 that has been inspected from the retaining stud 35, so that workers can more easily collect and use the inspected fasteners 11.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fastener strength detection device, comprising a placement table (12) for placing and detecting a fastener (11) and a visual image processing module for performing real-time analysis and processing of the surface stress condition of the fastener (11), characterized in that ； A plurality of protective shells (14) are fixedly connected to the placement platform (12), and a coupling sleeve (15) is connected to each of the protective shells (14); Two limit columns (16) are fixedly connected to the placement platform (12), a transmission plate (17) is slidably connected to the two limit columns (16), a lifting cylinder (18) is fixedly connected between the two limit columns (16), the lifting cylinder (18) is fixedly connected to the placement platform (12), and the telescopic shaft of the lifting cylinder (18) is fixedly connected to the lower side of the transmission plate (17); A driving component for applying force to the fastener (11) for strength testing is connected between the transmission plate (17) and each protective housing (14); The driving assembly comprises a plurality of locking sleeves (21), each of the locking sleeves (21) having a locking groove (22) on its lower side, each of the locking grooves (22) having the same shape as a fastener (11) of different outer diameters, and each of the connecting sleeves (15) is connected with a locking assembly that cooperates with each of the locking sleeves (21) to limit each of the fasteners (11); The outer ring of each coupling sleeve (15) is fixedly connected with a screw-out gear (51), each of the protective shells (14) is rotatably connected with an adjusting gear (52), the lower side of each adjusting gear (52) is coaxially fixedly connected with a third synchronous wheel (53), the lower side of the placement platform (12) is rotatably connected with a fourth synchronous wheel (54), the fourth synchronous wheel (54) and a plurality of third synchronous wheels (53) are meshed with a second synchronous belt (55), a second motor (56) is fixedly connected to the side wall of the lower side of the placement platform (12), the driving shaft of the second motor (56) is coaxially fixedly connected with the fourth synchronous wheel (54), and when the coupling sleeve (15) equipped with the fastener (11) is tipped over to one side, the screw-out gear (51) on the coupling sleeve (15) automatically meshes with the adjusting gear (52).

2. The fastener strength detection device according to claim 1, characterized in that: The upper side of each positioning sleeve (21) is slidably connected to a receiving plate (23), the upper side of each receiving plate (23) is fixedly connected to a supporting plate (24), each supporting plate (24) is rotatably connected to an adjusting nut (25), and each adjusting nut (25) is threadedly connected to an adjusting block (26); An adjustment groove (231) is provided on the receiving plate (23), and each of the adjustment blocks (26) is rotatably connected to a receiving column (261), each of the receiving columns (261) abuts against an inner wall of an adjacent adjustment groove (231), and a lower end of each receiving column (261) is fixedly connected to an adjacent positioning sleeve (21); A coupling disc (27) is fixedly connected to the upper side of each receiving disc (23), each coupling disc (27) is rotatably connected to the lower side of the transmission plate (17), each coupling disc (27) is coaxially fixedly connected to a first synchronous wheel (28), a second synchronous wheel (29) is rotatably connected to the upper side of the transmission plate (17), a first synchronous belt (210) is meshed on the second synchronous wheel (29) and a plurality of first synchronous wheels (28), a first motor (211) is fixedly connected to the lower side of the transmission plate (17), and a drive shaft of the first motor (211) is coaxially fixedly connected to the second synchronous wheel (29).

3. The fastener strength detection device according to claim 2, characterized in that: The positioning assembly comprises a limiting plate (31), the limiting plate (31) is provided with a plurality of reset grooves (32), each of the reset grooves (32) is slidably connected to an inner wall with a positioning column (33), each of the positioning columns (33) is hingedly connected to an upper end with a positioning block (34), a positioning stud (35) is clamped between the plurality of positioning blocks (34), and the positioning stud (35) is threadedly connected to the fastener (11); The limiting plate (31) is provided with a sliding groove (36), the inner wall of the sliding groove (36) is abutted against a reset column (37), the lower end of each reset column (37) is rotatably connected to a first locking terminal (38), the limiting plate (31) is annularly fixedly connected to a plurality of second locking terminals (39) with the axis of the limiting plate (31) as the center, and a reset tension spring (310) is clamped between each of the first locking terminals (38) and the second locking terminal (39) on one side; The upper end of the reset column (37) is fixedly connected to a reset plate (311), and a force transmission plate (312) is hingedly connected to the reset plate (311). One end of each force transmission plate (312) away from the reset plate (311) is hingedly connected to an adjacent positioning block (34).

4. The fastener strength detection device according to claim 3, characterized in that: The positioning block (34) is provided with a limiting groove (341), the outer side of the positioning stud (35) is fixedly connected with a limiting block (351), and the limiting block (351) abuts against the inner wall of the limiting groove (341).

5. The fastener strength detection device according to claim 1, characterized in that: A transmission column sleeve (41) is rotatably connected to the lower side of the coupling sleeve (15); the transmission column sleeve (41) is rotatably connected in the protective shell (14); the transmission column sleeve (41) is fixedly connected to a transmission gear (42) toward the outside of the protective shell (14); a plurality of adjustment racks (43) are meshed on the lower sides of the transmission gears (42); and the adjustment racks (43) are slidably connected to the side of the placement platform (12).

6. The fastener strength detection device according to claim 5, characterized in that: The transmission column sleeve (41) is rotatably connected to two connecting sleeves (15), and the two connecting sleeves (15) are arranged in a ring shape with the axis of the transmission column sleeve (41) as the center.

7. The fastener strength detection device according to claim 1, characterized in that: Both sides of each protective shell (14) are fixedly connected with a resistance plate (57).

8. The fastener strength detection device according to claim 1, characterized in that: A receiving ring (151) is detachably fixedly connected inside the connecting sleeve (15).

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