Anti-fatigue comprehensive testing device for twist-off-preventing double-horn-head countersunk screw

Abstract

The invention provides an anti-fatigue comprehensive testing device for anti-twist-off double-horn-head countersunk screws, and relates to the technical field of production quality detection of screws special for new energy automobiles. The anti-fatigue comprehensive testing device for the twist-off-preventing double-horn-head countersunk head screw comprises a testing table, a feeding port is formed in the top of the testing table, a first screw rod is rotationally installed in the testing table, a first motor is fixedly installed in the testing table, the first motor is in transmission connection with the first screw rod, and a second screw rod is fixedly installed in the testing table. The outer side of the first screw rod is in threaded connection with a sliding seat, a bearing plate is arranged on the test board, and the top end of the sliding seat extends out of the test board and is fixedly connected with the bearing plate. The anti-fatigue comprehensive testing device for the twist-off-preventing double-horn-head countersunk head screws has the advantages that using is convenient, the damage degree of the screws can be automatically detected and classified after testing is completed, the multiple screws can be conveyed to the designated position in order, and therefore the feeding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of production quality inspection of special screws for new energy vehicles, and particularly relates to an anti-torsion-breaking double-flared-head countersunk screw anti-fatigue comprehensive test device. Background Art

[0002] The double-flared-head countersunk screw has unique application value in the manufacturing of new energy vehicles. Its double-flared-head design is outstanding in improving connection reliability, space optimization, and anti-loosening performance. It is mainly used for connections between battery modules, sealing of high-voltage junction boxes, connection of motor housing parting surfaces, fixing of reducer bearing end covers, splicing of aluminum alloy bodies, and chassis battery guards. Its double-sided countersunk design has the advantage that both ends can sink into the connecting piece to achieve zero protrusion; it can adapt to high-density layouts such as battery packs and motors, enhance sealing performance, and the two ends of the countersunk holes can cooperate with sealing rings to achieve double protection, better realizing dust and water protection for the battery pack; its excellent anti-torsion-breaking performance, the double-head structure can disperse torque stress and reduce the risk of fracture, greatly improving the reliability in the high-frequency vibration environment of the motor.

[0003] At present, the anti-torsion-breaking double-flared-head countersunk screw anti-fatigue comprehensive test device is a device used to evaluate the anti-fatigue performance of anti-torsion-breaking double-flared-head countersunk screws under different working conditions. It can simulate the stress conditions of the screws in actual use, conduct comprehensive tests on various parameters of the screws, and provide data support for the quality inspection and performance optimization of the screws. By means of motors, transmission devices, and fixtures, etc., different magnitudes and frequencies of torque, tensile force, and other loads are applied to the screws to simulate the stress states of the screws during tightening and use.

[0004] When the traditional anti-torsion-breaking double-flared-head countersunk screw anti-fatigue comprehensive test device conducts anti-fatigue comprehensive tests on screws, it requires staff to manually place the screws one by one into the test positions, which is slow. Especially when a large number of screws need to be tested, it will consume a lot of time and manpower. Repeating the manual screw placement work for a long time, the operators are prone to fatigue, resulting in operation errors and interruptions or mistakes, affecting the continuity and stability of the test, and further affecting the test efficiency.

[0005] Therefore, it is necessary to provide an anti-torsion-breaking double-flared-head countersunk screw anti-fatigue comprehensive test device to solve the above technical problems. Summary of the Invention

[0006] The technical problem solved by the present invention is to provide an anti-torsion-breaking double-flared-head countersunk screw anti-fatigue comprehensive test device that is easy to use, can automatically detect the damage degree of the screws and classify them after the test is completed, and can orderly transport multiple screws to the designated positions, thereby improving the feeding efficiency.

[0007] To solve the above technical problems, the anti-fatigue comprehensive test device for anti-twist break double-flared head countersunk screws provided by the present invention includes: a feeding port is provided at the top of the test bench, a first screw rod is rotatably installed in the test bench, a first motor is fixedly installed in the test bench, the first motor is in transmission connection with the first screw rod, a sliding seat is threadedly connected to the outer side of the first screw rod, a bearing plate is provided on the test bench, the top end of the sliding seat extends outside the test bench and is fixedly connected to the bearing plate, a movable plate is provided on the top of the bearing plate, a base is provided on the top of the movable plate, a pressure sensor is fixedly installed in the base, a first support frame is fixedly installed on the test bench, a limiting frame is fixedly installed on the top of the first support frame, a top plate is provided on the limiting frame, one ends of three spring pieces are fixedly installed at the bottom of the top plate, the other ends of the spring pieces are fixedly connected to the first support frame, an electromagnet is further provided at the bottom of the top plate, a guiding rail is fixedly installed in the top plate, one end of the guiding rail extends outside the top plate, and a fixed rod is fixedly installed at the bottom of the end of the guiding rail away from the top plate, two moving blocks are slidably installed in the first support frame, second hydraulic cylinders are fixedly installed on both sides of the first support frame, the telescopic ends of the two second hydraulic cylinders are fixedly installed with the same first lifting plate, a feeding cylinder is fixedly installed on the first lifting plate, one ends of two first hinge rods are hinged to the top of the feeding cylinder, the other ends of the first hinge rods extend into the first support frame and are hinged to the moving blocks, two positioning plates are rotatably installed at the bottom of the feeding cylinder, return springs are provided on both of the two positioning plates, two ejector rods are fixedly installed on the top of the base, a second support frame is fixedly installed on the test bench, a first hydraulic cylinder is fixedly installed on the top of the second support frame, and the telescopic end of the first hydraulic cylinder extends to the bottom of the second support frame and is fixedly installed with a pressing block.

[0008] Preferably, a ring plate is fixedly installed at the bottom of the top plate, the ring plate is located inside the limiting frame, and a guiding groove is further provided at the end of the guiding rail away from the top plate.

[0009] Preferably, a screw concentration groove is provided in the first support frame, chambers are provided on the inner walls of both sides of the screw concentration groove, and the moving blocks are slidably installed in the chambers.

[0010] Preferably, rotating rods are rotatably installed on both sides of the base. A first gear is fixedly installed on the outer wall of the rotating rod. An articulated plate is also fixedly installed on the outer wall of the rotating rod. One ends of two second articulated rods are articulated to one side of the articulated plate close to the first gear. Two claws are slidably installed in the base. Connecting shafts are fixedly installed on both sides of the two claws. One end of the connecting shaft away from the claw extends outside the base. The other end of the second articulated rod is articulated to the connecting shaft. Two fixing plates are fixedly installed at the bottom of the second support frame. Two racks are fixedly installed on each of the two fixing plates.

[0011] Preferably, the two racks on the fixing plate are arranged oppositely.

[0012] Preferably, the two claws are U-shaped and are respectively distributed on both sides of the pressure sensor.

[0013] Preferably, two discharge ports are provided on the test bench. Guide seats are fixedly installed at the bottoms of the two discharge ports. Collection boxes are provided on the two guide seats. A third support frame is fixedly installed on the test bench. A second motor is fixedly installed on one side of the third support frame. One end of a second screw rod is rotatably installed on the test bench. The other end of the second screw rod is fixedly connected to the output shaft of the second motor. A second lifting plate is provided at the bottom of the third support frame. One end of the second lifting plate extends outside the third support frame and is threadedly connected to the outside of the second screw rod. A rotating seat is rotatably installed at the bottom of the second lifting plate. A fixing ring is fixedly installed at the bottom of the rotating seat. Two detectors are fixedly installed on the inner wall of the fixing ring. A second gear is fixedly installed on the outer wall of the rotating seat. A third motor is fixedly installed at the top of the second lifting plate. The output shaft of the third motor extends to the bottom of the second lifting plate and is fixedly installed with a third gear. The third gear meshes with the second gear. Bidirectional screw rods are rotatably installed on both sides of the load-bearing plate. Fourth motors are fixedly installed on both sides of the load-bearing plate. The fourth motor is in transmission connection with the bidirectional screw rod. Two second articulated seats are threadedly connected to the outside of the bidirectional screw rod. One end of a third articulated rod is articulated to the top of the second articulated seat. The other end of the third articulated rod is articulated to a first articulated seat. Four movable guide rods are slidably installed on the top of the movable plate. One end of the movable guide rod close to the fourth motor is articulated to the first articulated seat. A rectangular base is rotatably installed in the movable plate. The rectangular base is fixedly connected to the bottom of the base.

[0014] Preferably, a guide rod is fixedly installed on one side of the third support frame away from the second motor. The other end of the second lifting plate extends outside the third support frame and is slidably installed on the guide rod.

[0015] Preferably, two guiding hollow plates are fixedly installed on the top of the movable plate, and the movable guiding rod is slidably installed in the guiding hollow plates.

[0016] Preferably, two sections of external threads are provided on the outer wall of the bidirectional screw rod, and the two sections of external threads have opposite helix directions.

[0017] Compared with the related art, the anti-torsion-breaking double-flared countersunk head screw anti-fatigue comprehensive test device provided by the present invention has the following beneficial effects: The present invention provides an anti-torsion-breaking double-flared countersunk head screw anti-fatigue comprehensive test device. Through the cooperation of a spring piece, a top plate, a guiding rail, a fixed rod, an annular plate, an electromagnet and a limiting frame, when the electromagnet is energized and generates vibration, the screws can be automatically arranged neatly during the vibration process, and by using the vibration principle, a plurality of screws can be quickly and orderly conveyed onto the guiding rail and into the screw concentration groove, greatly improving the feeding efficiency, realizing automatic feeding, reducing manual operation, reducing labor costs, and at the same time avoiding problems caused by manual fatigue or operation differences; through the cooperation of a second hydraulic cylinder, a first lifting plate, a positioning plate, a feeding cylinder, a first hinge rod, a moving block, a return spring and a top rod, when the second hydraulic cylinder drives the feeding cylinder to descend, the moving block is driven by the first hinge rod to abut against the hole, so that it can be accurately controlled that only one screw is conveyed onto the base each time, avoiding the chaos caused by multiple screws falling simultaneously, and ensuring the accuracy and stability of the feeding; Through the cooperation of a claw, a rotating rod, a first gear, a connecting shaft, a second hinge rod, a hinge plate, a fixing plate and a rack, the cooperation of the first gear and the rack can accurately control the timing and position of clamping and releasing, ensuring that the screw is clamped and released at the accurate position, improving the accuracy and reliability of the test, clamping the screw before it moves to the bottom of the first hydraulic cylinder, which can prevent the screw from affecting the test due to accidental sliding or deviation, effectively avoiding the occurrence of misoperation. After clamping the screw, it can also prevent the screw from popping out or rolling due to force during the test, thereby protecting the surrounding environment, preventing the screw from damaging other components, and also realizing automatic clamping and releasing of the screw, reducing the manual operation link; Through the cooperation of the second motor, the second screw, the fixed ring, the guide rod, the second lifting plate, the third support frame, the third motor, the second gear, the third gear, the third support frame, the detector, the load-bearing plate, the first hinge seat, the bidirectional screw, the second hinge seat, the third hinge rod, the fourth gear, the guide seat, the collection box, the fourth motor, the fifth gear and the movable guide rod, when the detector rotates and descends, it can detect the whole screw, observe the surface of the screw comprehensively and without dead angles, accurately identify tiny defects such as bending and cracking, greatly improve the detection accuracy and accuracy compared with manual detection or single-angle detection, and automatically separate the intact screws from the defective screws, avoiding misjudgment and missed judgment that may occur in manual classification, and classifying the problematic screws in a timely and accurate manner, which helps to control the quality of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 6 is a schematic structural diagram of the first embodiment of the anti-torsion double-flared head countersunk screw anti-fatigue comprehensive test device provided by the present invention; Figure 2 is Figure 1 the sectional schematic diagram of the structure shown in FIG. 6; Figure 3 is Figure 1 the partial structural schematic diagram of the structure shown in FIG. 6; Figure 4 is Figure 3 the top view schematic diagram of the top plate and the guide rail shown in FIG. 21; Figure 5 is Figure 3 the sectional schematic diagram of the top plate and the limit frame shown in FIG. 26; Figure 6 is Figure 3 the sectional structural schematic diagram of the structure shown in FIG. 31; Figure 7 is Figure 6 the cooperation schematic diagram of the positioning plate and the return spring shown in FIG. 36; Figure 8 is Figure 2 the partial structural schematic diagram of the structure shown in FIG. 41; Figure 9 is Figure 8 the sectional schematic diagram of the structure shown in FIG. 46; Figure 10 FIG. 49 is a schematic structural diagram of the second embodiment of the anti-torsion double-flared head countersunk screw anti-fatigue comprehensive test device provided by the present invention; Figure 11 is Figure 10 the partial structural schematic diagram of the structure shown in FIG. 54; Figure 12 is Figure 11 the sectional schematic diagram of the structure shown in FIG. 59; Figure 13 is Figure 11Schematic diagram of the cooperation of structures such as the first gear, hinge plate, and second hinge rod shown; Figure 14 is Figure 10 Schematic diagram of the cooperation of the fixed plate and the rack shown; Figure 15 Schematic diagram of the structure of the third embodiment of the anti-torsion double-flared countersunk head screw anti-fatigue comprehensive test device provided by the present invention; Figure 16 is Figure 15 Schematic diagram of the sectional view of the structure shown; Figure 17 is Figure 15 Schematic diagram of a partial structure shown; Figure 18 is Figure 17 Schematic diagram of the cooperation of structures such as the third motor, third gear, second gear, and rotating seat shown; Figure 19 is Figure 18 Schematic diagram of the sectional view of the second gear, rotating seat, and fixed ring shown; Figure 20 is Figure 15 Schematic diagram of a partial structure shown; Figure 21 is Figure 20 Schematic diagram of another perspective of the structure shown; Figure 22 is Figure 21 Schematic diagram of the sectional view of the top of the structure shown.

[0019] Reference numerals in the figure: 1, test bench; 2, first support frame; 3, second support frame; 4, first hydraulic cylinder; 5, feed inlet; 6, top plate; 7, first screw rod; 8, sliding seat; 9, first motor; 10, first bevel gear; 11, second bevel gear; 12, guide rail; 13, pressing block; 14, second hydraulic cylinder; 15, first lifting plate; 16, feeding cylinder; 17, spring plate; 18, fixed rod; 19, annular plate; 20, electromagnet; 21, limiting frame; 22, moving block; 23, first hinge rod; 24, positioning plate; 25, return spring; 26, ejector rod; 27, base; 28, movable plate; 29, load-bearing plate; 30, pressure sensor; 31, fixing plate; 32, hinge plate; 33, connecting shaft; 34, rotating rod; 35, first gear; 36, second hinge rod; 37, claw; 38, rack; 39, second motor; 40, second lifting plate; 41, third support frame; 42, collection box; 43, guide rod; 44, guide seat; 45, second screw rod; 46, second gear; 47, third motor; 48, fixed ring; 49, third gear; 50, detector; 51, rotating seat; 52, movable guide rod; 53, first hinge seat; 54, bidirectional screw rod; 55, second hinge seat; 56, third hinge rod; 57, fourth gear; 58, fourth motor; 59, fifth gear. Detailed implementation mode

[0020] The present invention will be further described below in conjunction with the accompanying drawings and the implementation mode.

[0021] First embodiment: Please refer to Figures 1 - 9In the first embodiment of the present invention, the anti-twist-off double-bugle-head countersunk screw anti-fatigue comprehensive testing device comprises: a feed port 5 is provided on the top of the test bench 1, a first screw rod 7 is rotatably installed in the test bench 1, a first motor 9 is fixedly installed in the test bench 1, the first motor 9 is transmission-connected to the first screw rod 7, a sliding seat 8 is threadedly connected to the outer side of the first screw rod 7, a load-bearing plate 29 is provided on the test bench 1, the top of the sliding seat 8 extends to the outside of the test bench 1 and is fixedly connected to the load-bearing plate 29, a movable plate 28 is provided on the top of the load-bearing plate 29, a base 27 is provided on the top of the movable plate 28, a pressure sensor 30 is fixedly installed in the base 27, a first support frame 2 is fixedly installed on the test bench 1, and the first support frame 2 A limit frame 21 is fixedly installed on the top of the top plate 6, and a top plate 6 is provided on the limit frame 21. One end of three spring sheets 17 is fixedly installed on the bottom of the top plate 6, and the other end of the spring sheet 17 is fixedly connected to the first support frame 2. An electromagnet 20 is also provided at the bottom of the top plate 6. A guide rail 12 is fixedly installed in the top plate 6, and one end of the guide rail 12 extends outside the top plate 6, and a fixing rod 18 is fixedly installed at the bottom of the end of the guide rail 12 away from the top plate 6. When the electromagnet 20 at the bottom of the top plate 6 is energized, the electromagnet 20 will generate an alternating magnetic field. Under the action of the alternating magnetic field, the hopper of the top plate 6 will generate a high-frequency slight vibration. At the same time, the spring sheet 17 will cause the hopper to generate a certain inclination angle and direction while vibrating. The screw is vibrated from the bottom of the electromagnet 20 to the guide rail 12. In this process, due to the shape and gravity center of the screw, the head of the screw is stuck on the guide rail 12, and finally the screw gradually moves to the screw concentration groove. Two moving blocks 22 are slidably installed in the first support frame 2. Second hydraulic cylinders 14 are fixedly installed on both sides of the first support frame 2. The same first lifting plate 15 is fixedly installed on the telescopic ends of the two second hydraulic cylinders 14. A delivery tube 16 is fixedly installed on the first lifting plate 15. The top of the delivery tube 16 is hinged to one end of two first hinged rods 23. The other end of the first hinged rod 23 extends The delivery tube 16 is moved downwards by the first hydraulic cylinder 14, and the delivery tube 16 is moved downwards by the first hydraulic cylinder 14, so that only one screw is delivered to the base 27 at a time, thereby avoiding the confusion caused by the simultaneous falling of multiple screws. Two positioning plates 24 are rotatably installed at the bottom of the delivery tube 16, and return springs 25 are arranged on the two positioning plates 24. Two push rods 26 are fixedly installed on the top of the base 27. The second support frame 3 is fixedly installed on the test bench 1, and the first hydraulic cylinder 4 is fixedly installed on the top of the second support frame 3. The telescopic end of the first hydraulic cylinder 4 extends to the bottom of the second support frame 3 and is fixedly installed with a pressure block 13.

[0022] A circular plate 19 is fixedly installed at the bottom of the top plate 6. The circular plate 19 is located inside the limit frame 21, and the limit frame 21 can limit the movement direction of the circular plate 19, enabling the circular plate 19 to only vibrate up and down and turn. A guide groove is also provided at one end of the guide rail 12 away from the top plate 6.

[0023] A screw concentration groove is provided inside the first support frame 2. Chambers are provided on both inner walls of the screw concentration groove, and the moving blocks 22 are slidably installed inside the chambers.

[0024] The working principle of the anti-torsion double-flared countersunk head screw anti-fatigue comprehensive test device provided by the present invention is as follows: Multiple screws are put into the top plate 6 from the feed port 5. When an alternating current is applied to the electromagnet 20, according to the principle of electromagnetic induction, an alternating magnetic field will be generated in the coil of the electromagnet. Under the action of the alternating magnetic field, the top plate 6 generates high-frequency micro-amplitude vibrations. At the same time, the spring piece 17 will cause the hopper to generate a certain tilt angle and direction movement while vibrating, enabling the screws to continuously perform upward and sliding movements inside the top plate 6. The screws are vibrated from the bottom of the electromagnet 20 and conveyed onto the guide rail 12. During this process, due to the shape and center of gravity characteristics of the screws, the heads of the screws get stuck on the guide rail 12, and finally the screws gradually move towards the screw concentration groove. After the screws enter the screw concentration groove, they fall into the delivery cylinder 16. Subsequently, two second hydraulic cylinders 14 are started. The telescopic ends of the two second hydraulic cylinders 14 drive the delivery cylinder 16 to descend through the first lifting plate 15. When the delivery cylinder 16 descends, the two moving blocks 22 are moved towards each other through the first hinge rod 23 to block the screw concentration groove, avoiding chaos caused by multiple screws falling simultaneously. When descending a certain height, the ejector rod 26 presses against the positioning plate 24, and at this time the screws fall into the base 27. The first motor 9 is started, and the output shaft of the first motor 9 drives the first screw rod 7 to rotate through the first bevel gear 10 and the second bevel gear 11, moving the base 27 to the bottom of the first hydraulic cylinder 4. The first hydraulic cylinder 4 is started, and the telescopic end of the first hydraulic cylinder 4 drives the pressing block 13 to descend to perform a pressure test on the screws.

[0025] Compared with the related technology, the anti-torsion double-flared countersunk head screw anti-fatigue comprehensive test device provided by the present invention has the following beneficial effects: The present invention provides an anti-torsion-breaking double-flared head countersunk screw anti-fatigue comprehensive testing device. Through the cooperation of a spring piece 17, a top plate 6, a guide rail 12, a fixing rod 18, an annular plate 19, an electromagnet 20 and a limiting frame 21, when the electromagnet 20 is energized and generates vibration, the screws can be automatically arranged neatly during the vibration process. And by using the vibration principle, a plurality of screws can be quickly and orderly conveyed onto the guide rail 12 and into the screw concentration groove, greatly improving the feeding efficiency, realizing automatic feeding, reducing manual operation, lowering the labor cost, and at the same time avoiding problems caused by manual fatigue or operation differences; through the cooperation of a second hydraulic cylinder 14, a first lifting plate 15, a positioning plate 24, a feeding cylinder 16, a first hinge rod 23, a moving block 22, a return spring 25 and a push rod 26, when the second hydraulic cylinder 14 drives the feeding cylinder 16 to descend, the moving block 22 is driven by the first hinge rod 23 to abut against the hole, so that it can be accurately controlled that only one screw is conveyed onto the base 27 each time, avoiding the chaos caused by multiple screws falling simultaneously, and ensuring the accuracy and stability of the feeding.

[0026] Second Embodiment: Based on the anti-torsion-breaking double-flared head countersunk screw anti-fatigue comprehensive testing device provided in the first embodiment of the present application, the second embodiment of the present application proposes another anti-torsion-breaking double-flared head countersunk screw anti-fatigue comprehensive testing device. The second embodiment is merely a preferred manner of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0027] The following further describes the second embodiment of the present invention in conjunction with the drawings and embodiments.

[0028] Please refer to Figures 10 - 14, the anti-torsion and anti-fatigue comprehensive test device for double-flared countersunk head screws further includes two rotating rods 34, which are respectively rotatably installed on both sides of the base 27. A first gear 35 is fixedly installed on the outer wall of the rotating rod 34, and a hinge plate 32 is also fixedly installed on the outer wall of the rotating rod 34. One end of two second hinge rods 36 is hinged to the side of the hinge plate 32 close to the first gear 35. Two claws 37 are slidably installed in the base 27. Connecting shafts 33 are fixedly installed on both sides of the two claws 37. The end of the connecting shaft 33 away from the claw 37 extends outside the base 27, and the other end of the second hinge rod 36 is hinged to the connecting shaft 33. Two fixing plates 31 are fixedly installed at the bottom of the second support frame 3. Two racks 38 are fixedly installed on each of the two fixing plates 31. When the base 27 moves and the first gear 35 meshes with the rack 38, the rotating rod 34 rotates, and the rotating rod 34 drives the hinge plate 32 to rotate. The hinge plate 32 moves the two connecting shafts 33 relative to each other through the second hinge rod 36, so that the two claws 37 move relative to each other to clamp the screw head, preventing the screw from affecting the test due to accidental sliding or deviation, effectively avoiding misoperation. After clamping the screw, it can also prevent it from popping out or rolling during the test due to the force, thus protecting the surrounding environment.

[0029] The two racks 38 on the fixing plate 31 are arranged oppositely. Through the opposite arrangement, when the first gear 35 first meshes with the rack 38, the claw 37 clamps the screw. When the base 27 moves again and the first gear 35 meshes with the rack 38 again, the two claws 37 release the screw and no longer clamp it.

[0030] The two claws 37 are U-shaped and are respectively distributed on both sides of the pressure sensor 30.

[0031] The output shaft of the first motor 9 drives the first screw rod 7 to rotate through the first bevel gear 10 and the second bevel gear 11, causing the base 27 to move. When the base 27 moves and the first gear 35 meshes with the rack 38, the rotating rod 34 rotates. The rotating rod 34 drives the hinged plate 32 to rotate. The hinged plate 32 moves the two connecting shafts 33 relative to each other through the second hinge rod 36, causing the two jaws 37 to move relative to each other to clamp the head of the screw. Subsequently, the first hydraulic cylinder 4 is activated to test the screw. After completion, the base 27 moves again, and the first gear 35 meshes with the rack 38 again. At this time, the two jaws 37 release the screw and no longer clamp it. Through the arrangement of the above components, the present invention can accurately control the timing and position of clamping and releasing by the cooperation of the first gear 35 and the rack 38, ensuring that the screw is clamped and released at the accurate position, improving the accuracy and reliability of the test. The screw is clamped before it moves to the bottom of the first hydraulic cylinder 4, which can prevent the screw from affecting the test due to accidental sliding or deviation, effectively avoiding the occurrence of misoperation. After clamping the screw, it can also prevent the screw from popping out or rolling due to the force during the test, thereby protecting the surrounding environment and preventing the screw from damaging other components. Moreover, it realizes automatic clamping and releasing of the screw, reducing the manual operation link.

[0032] Third Embodiment: Based on the anti-torsion-breaking double-flared-head countersunk screw anti-fatigue comprehensive test device provided in the second embodiment of the present application, the third embodiment of the present application proposes another anti-torsion-breaking double-flared-head countersunk screw anti-fatigue comprehensive test device. The third embodiment is merely a preferred mode of the second embodiment, and the implementation of the third embodiment will not affect the independent implementation of the second embodiment.

[0033] The following further describes the third embodiment of the present invention in conjunction with the drawings and the embodiments.

[0034] Please refer to Figures 15 - 22, the anti-torsion-breaking double-flared countersunk head screw anti-fatigue comprehensive test device further includes two discharge ports, both of which are arranged on the test bench 1. Guide seats 44 are fixedly installed at the bottoms of the two discharge ports, and collection boxes 42 are provided on both of the two guide seats 44. A third support frame 41 is fixedly installed on the test bench 1. A second motor 39 is fixedly installed on one side of the third support frame 41. One end of a second screw rod 45 is rotatably installed on the test bench 1, and the other end of the second screw rod 45 is fixedly connected to the output shaft of the second motor 39. A second lifting plate 40 is provided at the bottom of the third support frame 41. One end of the second lifting plate 40 extends outside the third support frame 41 and is threadedly connected to the outside of the second screw rod 45. A rotating seat 51 is rotatably installed at the bottom of the second lifting plate 40. A fixing ring 48 is fixedly installed at the bottom of the rotating seat 51. Two detectors 50 are fixedly installed on the inner wall of the fixing ring 48. A second gear 46 is fixedly installed on the outer wall of the rotating seat 51. A third motor 47 is fixedly installed at the top of the second lifting plate 40. The output shaft of the third motor 47 extends to the bottom of the second lifting plate 40 and is fixedly installed with a third gear 49. The third gear 49 meshes with the second gear 46. Bidirectional screw rods 54 are rotatably installed on both sides of the bearing plate 29. Fourth motors 58 are fixedly installed on both sides of the bearing plate 29. The fourth motors 58 are in transmission connection with the bidirectional screw rods 54. Two second hinge seats 55 are threadedly connected to the outside of the bidirectional screw rods 54. One end of a third hinge rod 56 is hinged to the top of the second hinge seat 55. The other end of the third hinge rod 56 is hinged to a first hinge seat 53. Four movable guide rods 52 are slidably installed on the top of the movable plate 28. One end of the movable guide rod 52 close to the fourth motor 58 is hinged to the first hinge seat 53. A rectangular base is rotatably installed inside the movable plate 28, and the rectangular base is fixedly connected to the bottom of the base 27. The output shaft of the first motor 9 drives the first screw rod 7 to rotate through the first bevel gear 10 and the second bevel gear 11, so that the base 27 moves to the bottom of the third support frame 41. The second motor 39 is started, and the output shaft of the second motor 39 drives the second screw rod 45 to rotate. The second screw rod 45 drives the rotating seat 51 to descend through the second lifting plate 40, so that the fixing ring 48 extends into the base 27 and the screws are detected by the detectors 50. Then the third motor 47 is started, and the output shaft of the third motor 47 drives the third gear 49 to rotate, and drives the rotating seat 51 to rotate by meshing with the second gear 46, so that the fixing ring 48 rotates, and the detectors 50 rotate and detect the screws, so as to realize observing the surface of the screws in all directions and without dead angles, and accurately identifying defects such as tiny bends and cracks.

[0035] A guide rod 43 is fixedly installed on the side of the third support frame 41 away from the second motor 39. The other end of the second lifting plate 40 extends outside the third support frame 41 and is slidably installed on the guide rod 43.

[0036] Two guiding hollow plates are fixedly installed at the top of the movable plate 28, and the movable guiding rod 52 is slidably installed within the guiding hollow plates.

[0037] Two sections of external threads are provided on the outer wall of the bidirectional screw 54, and the helix directions of the two sections of external threads are opposite. Through such a setting, the two second hinge seats 55 can move away from each other, and drive the first hinge seat 53 through the third hinge rod 56 to lift one side of the movable plate 28 upward. When one side of the movable plate 28 is lifted upward, the movable guiding rod 52 rises with the first hinge seat 53 and moves out of the guiding hollow plate, thus easily lifting one side of the movable plate 28.

[0038] After the screw pressure test is completed, the first motor 9 is started again. The output shaft of the first motor 9 drives the first screw 7 to rotate through the first bevel gear 10 and the second bevel gear 11, so that the base 27 moves to the bottom of the third support frame 41. Then the second motor 39 is started, and the output shaft of the second motor 39 drives the second screw 45 to rotate. The second screw 45 drives the rotating seat 51 to descend through the second lifting plate 40, so that the fixed ring 48 extends into the base 27 and the screw is detected by the detector 50. Subsequently, the third motor 47 is started, and the output shaft of the third motor 47 drives the third gear 49 to rotate, and drives the rotating seat 51 to rotate by meshing with the second gear 46, so that the fixed ring 48 rotates, and the detector 50 rotates to detect the screw, identifying tiny defects such as bending and cracking. When the screw contains cracks, the fourth motor 58 on the left is started. The output shaft of the fourth motor 58 drives the bidirectional screw 54 to rotate through the fifth gear 59 and the fourth gear 57. When the two bidirectional screws 54 rotate, they drive the two second hinge seats 55 to move in opposite directions, and drive the first hinge seat 53 through the third hinge rod 56 to lift one side of the movable plate 28 upward. When one side of the movable plate 28 is lifted upward, the movable guiding rod 52 rises with the first hinge seat 53 and moves out of the guiding hollow plate. At this time, since the bottom of the base 27 rotates on the movable plate 28 through the rectangular base, the base 27 tilts and the screw moves out of the base 27 due to its own gravity, and falls into the collection box 42 through the guiding seat 44. When a perfect screw is detected, the fourth motor 58 on the right is started, which can automatically separate the perfect screws from the defective screws. Through the setting of the above components in the present invention, the detector 50 can detect the whole screw when rotating and descending, can observe the surface of the screw comprehensively and without dead angles, accurately identify tiny defects such as bending and cracking. Compared with manual detection or single-angle detection, it greatly improves the detection accuracy and precision, and automatically separates the perfect screws from the defective screws, avoiding misjudgment and missed judgment that may occur in manual classification, and classifying the problematic screws in a timely and accurate manner, which helps to control the quality of the production process.

[0039] The above are only embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of the present invention.

Claims

1. A comprehensive anti-fatigue testing device for anti-twist-off double-bugle countersunk screws, comprising a test bench (1), characterized in that: The top of the test bench (1) is provided with a feed port (5), a first screw (7) is rotatably mounted in the test bench (1), a first motor (9) is fixedly mounted in the test bench (1), the first motor (9) and the first screw (7) are drivingly connected, the outer side of the first screw (7) is threadedly connected to a sliding seat (8), a load-bearing plate (29) is provided on the test bench (1), the top of the sliding seat (8) extends to the outside of the test bench (1) and is fixedly connected to the load-bearing plate (29), a movable plate (28) is provided on the top of the load-bearing plate (29), and the top of the movable plate (28) is provided with A base (27) is provided, a pressure sensor (30) is fixedly installed in the base (27), a first support frame (2) is fixedly installed on the test bench (1), a limit frame (21) is fixedly installed on the top of the first support frame (2), a top plate (6) is provided on the limit frame (21), one end of three spring sheets (17) are fixedly installed on the bottom of the top plate (6), the other end of the spring sheet (17) is fixedly connected to the first support frame (2), an electromagnet (20) is also provided at the bottom of the top plate (6), a guide rail (12) is fixedly installed in the top plate (6), and the guide rail (12) ) extends outside the top plate (6), and a fixed rod (18) is fixedly installed at the bottom of one end of the guide rail (12) away from the top plate (6), two moving blocks (22) are slidably installed in the first support frame (2), second hydraulic cylinders (14) are fixedly installed on both sides of the first support frame (2), and the same first lifting plate (15) is fixedly installed on the telescopic ends of the two second hydraulic cylinders (14), and a delivery cylinder (16) is fixedly installed on the first lifting plate (15), and the top of the delivery cylinder (16) is hinged to one end of two first hinged rods (23), and the first hinged rods The other end of the (23) extends into the first support frame (2) and is hinged to the moving block (22); two positioning plates (24) are rotatably mounted on the bottom of the delivery tube (16); return springs (25) are provided on the two positioning plates (24); two push rods (26) are fixedly mounted on the top of the base (27); a second support frame (3) is fixedly mounted on the test bench (1); a first hydraulic cylinder (4) is fixedly mounted on the top of the second support frame (3); a telescopic end of the first hydraulic cylinder (4) extends to the bottom of the second support frame (3) and is fixedly mounted with a pressure block (13).

2. The anti-fatigue comprehensive test device for anti-twist fracture double-flared head countersunk screws according to claim 1, characterized in that, An annular plate (19) is fixedly mounted on the bottom of the top plate (6), the annular plate (19) being located in the limiting frame (21), and a guide groove is further provided at one end of the guide rail (12) away from the top plate (6).

3. The anti-fatigue comprehensive test device for the anti-twist break double-flared head countersunk screw according to claim 1, wherein, The first support frame (2) is provided with a screw concentration groove, and the inner walls on both sides of the screw concentration groove are provided with chambers, and the moving block (22) is slidably installed in the chambers.

4. The anti-fatigue comprehensive test device for the anti-twist-breaking double-flared head countersunk screws according to claim 1, characterized in that, Rotating rods (34) are rotatably installed on both sides of the base (27). A first gear (35) is fixedly installed on the outer wall of the rotating rod (34). An articulated plate (32) is also fixedly installed on the outer wall of the rotating rod (34). One ends of two second articulated rods (36) are articulated to one side of the articulated plate (32) close to the first gear (35). Two claws (37) are slidably installed in the base (27). Connecting shafts (33) are fixedly installed on both sides of the two claws (37). One ends of the connecting shafts (33) away from the claws (37) extend outside the base (27). The other ends of the second articulated rods (36) are articulated to the connecting shafts (33). Two fixing plates (31) are fixedly installed at the bottom of the second support frame (3). Two racks (38) are fixedly installed on each of the two fixing plates (31).

5. The anti-fatigue comprehensive test device for anti-twist break double-flared head countersunk screws according to claim 4, characterized in that, The two racks (38) on the fixing plate (31) are arranged oppositely.

6. The anti-fatigue comprehensive test device for anti-twist break double-flared head countersunk screws according to claim 4, characterized in that, The two claws (37) are U-shaped and are respectively distributed on both sides of the pressure sensor (30).

7. The anti-fatigue comprehensive test device for the anti-twist break double-flared head countersunk screws according to claim 1, characterized in that, The test bench (1) is provided with two discharge ports, and guiding seats (44) are fixedly installed at the bottoms of the two discharge ports. Collection boxes (42) are arranged on the two guiding seats (44). A third support frame (41) is fixedly installed on the test bench (1). A second motor (39) is fixedly installed on one side of the third support frame (41). One end of a second screw rod (45) is rotatably installed on the test bench (1), and the other end of the second screw rod (45) is fixedly connected to the output shaft of the second motor (39). A second lifting plate (40) is arranged at the bottom of the third support frame (41). One end of the second lifting plate (40) extends outside the third support frame (41) and is threadedly connected to the outside of the second screw rod (45). A rotating seat (51) is rotatably installed at the bottom of the second lifting plate (40). A fixing ring (48) is fixedly installed at the bottom of the rotating seat (51). Two detectors (50) are fixedly installed on the inner wall of the fixing ring (48). A second gear (46) is fixedly installed on the outer wall of the rotating seat (51). A third motor (47) is fixedly installed at the top of the second lifting plate (40). The output shaft of the third motor (47) extends to the bottom of the second lifting plate (40) and is fixedly installed with a third gear (49). The third gear (49) meshes with the second gear (46). Bidirectional screw rods (54) are rotatably installed on both sides of the load-bearing plate (29). Fourth motors (58) are fixedly installed on both sides of the load-bearing plate (29). The fourth motors (58) are in transmission connection with the bidirectional screw rods (54). Two second hinge seats (55) are threadedly connected to the outside of the bidirectional screw rods (54). One end of a third hinge rod (56) is hinged to the top of the second hinge seat (55), and the other end of the third hinge rod (56) is hinged to a first hinge seat (53). Four movable guide rods (52) are slidably installed on the top of the movable plate (28). One end of the movable guide rod (52) close to the fourth motor (58) is hinged to the first hinge seat (53). A rectangular base is rotatably installed inside the movable plate (28), and the rectangular base is fixedly connected to the bottom of the base (27).

8. The anti-fatigue comprehensive test device for anti-twist fracture double-flared head countersunk screws according to claim 7, characterized in that, A guide rod (43) is fixedly installed on the side of the third support frame (41) away from the second motor (39). The other end of the second lifting plate (40) extends outside the third support frame (41) and is slidably installed on the guide rod (43).

9. The anti-fatigue comprehensive test device for anti-twist fracture double-flared head countersunk screws according to claim 7, characterized in that, Two guide hollow plates are fixedly installed on the top of the movable plate (28), and the movable guide rods (52) are slidably installed inside the guide hollow plates.

10. The anti-fatigue comprehensive test device for anti-twist break double-flared head countersunk screws according to claim 7, characterized in that, Two sections of external threads are provided on the outer wall of the bidirectional screw rod (54), and the rotation directions of the two sections of external threads are opposite.

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