A multi-functional experimental platform for bolt loosening test

Abstract

The present invention discloses a multi-functional experimental platform for bolt loosening test, which includes a base, an upper connecting plate clamping system fixedly arranged at one end of the base, a lower connecting plate clamping system fixedly arranged at the other end of the base, a moving system fixedly arranged at the central position of the base, and a bolt connection system arranged above the moving system. The bolt connection system is arranged between the upper connecting plate clamping system and the lower connecting plate clamping system. By adopting the multi-functional experimental platform for bolt loosening test with the above structure, an overturning moment, a transverse shear force and an axial force can be applied, and the influence of various stress conditions on bolt loosening can be monitored through sensors, so as to obtain the reasons for bolt loosening, and some methods can be proposed to better cope with the problem of bolt loosening in actual production.

Description

Technical Field

[0001] The present invention relates to the technical field of experimental platforms, and in particular to a multi-functional experimental platform for bolt loosening testing. Background Art

[0002] Bolt connection is a widely used detachable fixed connection, which has a simple structure, reliable connection and convenient disassembly. For assembly factories, especially for construction machinery assembly factories, bolt connection has the advantages of being convenient for standardized mass production, simple structure, low cost, easy installation and disassembly, etc., and is widely used.

[0003] During the use of equipment, due to load changes, vibration, impact or long-term working conditions, bolts are very likely to loosen, greatly reducing their safety and reliability. In the lightest case, it will cause significant economic losses, and in the most serious case, it will affect the personal safety of equipment operators.

[0004] Bolt connection is a very important mechanical element. However, the problem of bolt loosening detection has been long ignored in China, and experimental equipment for studying bolt loosening is also relatively scarce. Summary of the Invention

[0005] The purpose of the present invention is to provide a multi-functional experimental platform for bolt loosening testing. By applying transverse shear force, axial force and overturning moment to the bolt connection, the influence of these forces on bolt loosening can be obtained, the cause of bolt loosening can be found, and solutions can be found based on the cause of bolt loosening, so as to solve the problem that bolts loosen due to various reasons during the use of engineering mechanical equipment, and improve the safety of equipment using bolt connection.

[0006] To achieve the above object, the present invention provides a multi-functional experimental platform for bolt loosening testing, including a base, an upper connecting plate clamping system fixedly arranged at one end of the base, a lower connecting plate clamping system fixedly arranged at the other end of the base, a moving system fixedly arranged at the center position of the base, and a bolt connection system arranged above the moving system. The bolt connection system is arranged between the upper connecting plate clamping system and the lower connecting plate clamping system.

[0007] Preferably, the bolt connection system includes an upper connecting plate and a lower connecting plate connected to the upper connecting plate. The upper connecting plate and the lower connecting plate are bolted together. An ultrasonic sensor is arranged at the position of the bolt head, and a nut is arranged at the position of the bolt tail. The end of the upper connecting plate far from the bolt is connected to the upper connecting plate clamping system, and the end of the lower connecting plate far from the bolt is connected to the lower connecting plate clamping system.

[0008] Preferably, the upper connecting plate clamping system includes a support, an upper clamping plate connecting system and a lower clamping plate connecting system arranged inside the support. The support is fixedly arranged on the base, and the upper connecting plate is connected between the upper clamping plate clamping system and the lower clamping plate clamping system.

[0009] Preferably, the lower clamping plate connecting system includes a lower clamping plate, a first slide rail arranged below the lower clamping plate, and a first slider slidably connected to the first slide rail. A first grating scale is connected to the first slider, a first connecting seat is connected below the first grating scale, a first crossed roller bearing is arranged below the first connecting seat, a first force sensor is arranged below the first crossed roller bearing, a first voice coil motor is arranged below the first force sensor, a second slide rail is arranged below the first voice coil motor, a second slider is slidably connected to the second slide rail, a second grating scale is arranged on the left side of the second slider and the second slide rail, and the second slider, the second slide rail and the second grating scale are fixedly connected to the base. The upper clamping plate connecting system and the lower clamping plate connecting system are symmetrically arranged.

[0010] Preferably, the upper clamping plate connecting system includes an upper clamping plate, a third slide rail arranged above the upper clamping plate, and a third slider slidably connected to the third slide rail. A third grating scale is connected to the third slider, a second connecting seat is connected below the third grating scale, a second crossed roller bearing is arranged below the second connecting seat, a second force sensor is arranged below the second crossed roller bearing, a second voice coil motor is arranged below the second force sensor, a fourth slide rail is arranged below the second voice coil motor, a fourth slider is slidably connected to the fourth slide rail, a fourth grating scale is arranged on the left side of the fourth slider and the fourth slide rail, and the fourth slider, the fourth slide rail and the fourth grating scale are fixedly connected to the support.

[0011] Preferably, the lower connecting plate clamping system includes an upper plate, a first gasket arranged below the upper plate, and a second gasket arranged below the first gasket. The lower connecting plate is connected between the first gasket and the second gasket, a lower plate is connected below the second gasket, a third force sensor is arranged below the lower plate, a third voice coil motor is arranged below the third force sensor, and the third voice coil motor is fixedly arranged on the base. Guide rods are arranged at both ends of the upper plate, the guide rods penetrate through the lower plate and are fixedly connected to the base, and guide sleeves are arranged between the guide rods and the lower plate.

[0012] Preferably, the mobile system includes a number of single mobile systems. Each single mobile system includes a fifth grating scale, a fifth slide rail disposed on the right side of the fifth grating scale, and a fifth slider slidably connected to the fifth slide rail. Above the fifth slider is provided a fourth voice coil motor. Above the fourth voice coil motor is provided a fourth force sensor. Above the fourth force sensor is provided a third crossed roller bearing. Above the third crossed roller bearing is provided a third connecting seat. Above the third connecting seat is provided a sixth grating scale. On one side of the sixth grating scale are provided a sixth slide rail and a sixth slider slidably connected to the sixth slide rail. The sixth grating scale, the sixth slide rail, and the sixth slider are fixedly connected to the lower clamping plate. The left side of the fourth voice coil motor is connected to a connecting plate. The left side of the connecting plate is connected to a stepping motor. Above the connecting plate is provided a push rod.

[0013] Therefore, by adopting the above-structured multi-functional experimental platform for bolt loosening test, the present invention can apply overturning moment, lateral shear force and axial force, and monitor the influence of various stress conditions on bolt loosening through sensors, so as to obtain the reasons for bolt loosening, and thus propose some methods to better deal with the problem of bolt loosening in actual production.

[0014] The technical solution of the present invention will be further described in detail below with reference to the drawings and embodiments. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the multi-functional experimental platform for bolt loosening test of the present invention;

[0016] Figure 2 It is the front view of an embodiment of the multi-functional experimental platform for bolt loosening test of the present invention;

[0017] Figure 3 It is a schematic diagram of the overall mobile system structure of an embodiment of the multi-functional experimental platform for bolt loosening test of the present invention;

[0018] Figure 4 It is a schematic diagram of the single mobile system structure of an embodiment of the multi-functional experimental platform for bolt loosening test of the present invention;

[0019] Description of the drawings: 1. Base; 2. Upper connecting plate clamping system; 3. Lower connecting plate clamping system; 4. Moving system; 5. Bolt connection system; 6. Upper connecting plate; 7. Lower connecting plate; 8. Bolt; 9. Ultrasonic sensor; 10. Nut; 11. Support; 12. Lower clamping plate; 13. First slide rail; 14. First slider; 15. First grating scale; 16. First connecting seat; 17. First crossed roller bearing; 18. First force sensor; 19. First voice coil motor; 20. Second slide rail; 21. Second slider; 22. Second grating scale; 23. Upper clamping plate; 24. Third slide rail; 25. Third slider; 26. Third grating scale; 27. Second connecting seat; 28. Second crossed roller bearing; 29. Second force sensor; 30. Second voice coil motor; 31. Fourth slide rail; 32. Fourth slider; 33. Fourth grating scale; 34. Upper plate; 35. First gasket; 36. Second gasket; 37. Lower plate; 38. Third force sensor; 39. Third voice coil motor; 40. Guide rod; 41. Guide sliding sleeve; 42. Fifth grating scale; 43. Fifth slide rail; 44. Fifth slider; 45. Fourth voice coil motor; 46. Fourth force sensor; 47. Third crossed roller bearing; 48. Third connecting seat; 49. Sixth grating scale; 50. Sixth slide rail; 51. Sixth slider; 52. Connecting plate; 53. Stepper motor; 54. Push rod. Detailed implementation mode

[0020] The technical solution of the present invention will be further described below with reference to the drawings and embodiments.

[0021] Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before the term cover the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative position relationships. When the absolute position of the object to be described changes, the relative position relationship may also change accordingly.

[0022] Embodiment

[0023] A multi-functional experimental platform for bolt loosening test, comprising a base 1, an upper connecting plate clamping system 2 fixedly arranged at one end of the base 1, a lower connecting plate clamping system 3 fixedly arranged at the other end of the base, a moving system 4 fixedly arranged at the center position of the base, and a bolt connection system 5 arranged above the moving system 4. The bolt connection system 5 is arranged between the upper connecting plate clamping system 2 and the lower connecting plate clamping system 3.

[0024] The bolt connection system 5 includes an upper connecting plate 6 and a lower connecting plate 7 connected to the upper connecting plate 6. The upper connecting plate 6 and the lower connecting plate 7 are connected by a bolt 8. An ultrasonic sensor 9 is arranged at the head position of the bolt 8, and a nut 10 is arranged at the tail position of the bolt 8. One end of the upper connecting plate 6 away from the bolt is connected to the upper connecting plate clamping system 2, and one end of the lower connecting plate 7 away from the bolt is connected to the lower connecting plate clamping system 3.

[0025] The upper connecting plate clamping system 2 includes a support 11, an upper clamping plate connection system and a lower clamping plate connection system arranged inside the support 11. The support 11 is fixedly arranged on the base 1, and the upper connecting plate 6 is connected between the upper clamping plate clamping system and the lower clamping plate clamping system.

[0026] The lower clamping plate connection system includes a lower clamping plate 12, a first slide rail 13 arranged below the lower clamping plate 12, and a first slider 14 slidably connected to the first slide rail 13. A first grating scale 15 is connected to the first slider 14. A first connecting seat 16 is connected below the first grating scale 15. A first crossed roller bearing 17 is arranged below the first connecting seat 16. A first force sensor 18 is arranged below the first crossed roller bearing 17. A first voice coil motor 19 is arranged below the first force sensor 18. A second slide rail 20 is arranged below the first voice coil motor 19. A second slider 21 is slidably connected to the second slide rail 20. A second grating scale 22 is arranged on the left side of the second slider 21 and the second slide rail 20. The second slider 21, the second slide rail 20, and the second grating scale 22 are fixedly connected to the base 1. The upper clamping plate connection system and the lower clamping plate connection system are symmetrically arranged.

[0027] The upper clamping plate connection system includes an upper clamping plate 23, a third slide rail 24 arranged above the upper clamping plate 23, and a third slider 25 slidably connected to the third slide rail 24. A third grating scale 26 is connected to the third slider 25. A second connecting seat 27 is connected below the third grating scale 26. A second crossed roller bearing 28 is arranged below the second connecting seat 27. A second force sensor 29 is arranged below the second crossed roller bearing 28. A second voice coil motor 30 is arranged below the second force sensor 29. A fourth slide rail 31 is arranged below the second voice coil motor 30. A fourth slider 32 is slidably connected to the fourth slide rail 31. A fourth grating scale 33 is arranged on the left side of the fourth slider 32 and the fourth slide rail 31. The fourth slider 32, the fourth slide rail 31, and the fourth grating scale 33 are fixedly connected to the support 11.

[0028] The lower connecting plate clamping system 3 includes an upper plate 34, a first gasket 35 disposed below the upper plate 34, and a second gasket 36 disposed below the first gasket 35. A lower connecting plate 7 is connected between the first gasket 35 and the second gasket 36. A lower plate 37 is connected below the second gasket 36. A third force sensor 38 is disposed below the lower plate 37. A third voice coil motor 39 is disposed below the third force sensor 38. The third voice coil motor 39 is fixedly disposed on the base 1. Guide rods 40 are disposed at both ends of the upper plate 34. The guide rods 40 penetrate through the lower plate 37 and are fixedly connected to the base 1. Guide bushings 41 are disposed between the guide rods 40 and the lower plate 37.

[0029] The moving system 4 includes a plurality of single moving systems. Each single moving system includes a fifth grating scale 42, a fifth slide rail 43 disposed on the right side of the fifth grating scale 42, and a fifth slider 44 slidably connected to the fifth slide rail 43. A fourth voice coil motor 45 is disposed above the fifth slider 44. A fourth force sensor 46 is disposed above the fourth voice coil motor 45. A third crossed roller bearing 47 is disposed above the fourth force sensor 46. A third connecting seat 48 is disposed above the third crossed roller bearing 47. A sixth grating scale 49 is disposed above the third connecting seat 48. A sixth slide rail 50 and a sixth slider 51 slidably connected to the sixth slide rail 50 are disposed on one side of the sixth grating scale 49. The sixth grating scale 49, the sixth slide rail 50, and the sixth slider 51 are fixedly connected to the lower clamping plate 12. A connecting plate 52 is connected to the left side of the fourth voice coil motor 45. A stepping motor 53 is connected to the left side of the connecting plate 52. A push rod 54 is disposed above the connecting plate 52.

[0030] During specific use, when the experimental platform is turned on, the axial movement of the motor rotors of the first voice coil motor 19 and the second voice coil motor 30 in the upper connecting plate clamping system 2 drives the axial movement of the lower clamping plate 12 and the upper clamping plate 23, so that the lower clamping plate 12 and the upper clamping plate 23 clamp the upper connecting plate 6. The axial movement of the motor rotor of the third voice coil motor 39 in the lower connecting plate clamping system 3 drives the axial movement of the second gasket 36, so that the second gasket 36 and the first gasket 35 clamp the lower connecting plate 7. Next, the stepping motor 53 in the moving system 4 starts to drive the fifth slider 44 to move, so that the bolt connection system 5 generates a transverse shear force. By the longitudinal movement of the fourth voice coil motor 45, the bolt connection system 5 can generate an axial force and an overturning moment. The fifth slider 44 is connected to the fifth grating scale 42, and the fifth grating scale 42 can accurately measure the moving distance of the stepping motor 53. An ultrasonic sensor 9 is installed on the bolt 8, and the loosening condition of the bolt connection system 5 can be judged according to the ultrasonic sensor 9. The third force sensor 38 installed below the lower plate 37 in the lower connecting plate clamping system 3 can measure the magnitudes of the above forces and moments, and finally the influence of different force conditions on the loosening of the bolt 8 can be obtained.

[0031] Therefore, the present invention adopts a multi-functional experimental platform for bolt loosening test with the above structure. The present invention adopts a multi-functional experimental platform for bolt loosening test with the above structure, which can apply overturning moment, lateral shear force and axial force, and monitor the influence of various force conditions on bolt loosening through sensors, so as to obtain the reasons for bolt loosening and propose some methods to better deal with the problem of bolt loosening in actual production.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-functional experimental platform for bolt loosening test, characterized in that: It includes a base, an upper connecting plate clamping system fixedly arranged at one end of the base, a lower connecting plate clamping system fixedly arranged at the other end of the base, a moving system fixedly arranged at the central position of the base, and a bolt connection system arranged above the moving system. The bolt connection system is arranged between the upper connecting plate clamping system and the lower connecting plate clamping system; The bolt connection system includes an upper connecting plate and a lower connecting plate connected to the upper connecting plate. The upper connecting plate and the lower connecting plate are bolt-connected. An ultrasonic sensor is arranged at the position of the bolt head, and a nut is arranged at the position of the bolt tail. The end of the upper connecting plate far from the bolt is connected to the upper connecting plate clamping system, and the end of the lower connecting plate far from the bolt is connected to the lower connecting plate clamping system; The upper connecting plate clamping system includes a support, an upper clamping plate connection system and a lower clamping plate connection system arranged inside the support. The support is fixedly arranged on the base, and the upper connecting plate is connected between the upper clamping plate clamping system and the lower clamping plate clamping system; The lower clamping plate connection system includes a lower clamping plate, a first slide rail arranged below the lower clamping plate, and a first slider slidably connected to the first slide rail. A first grating scale is connected to the first slider, a first connecting seat is connected below the first grating scale, a first crossed roller bearing is arranged below the first connecting seat, a first force sensor is arranged below the first crossed roller bearing, a first voice coil motor is arranged below the first force sensor, a second slide rail is arranged below the first voice coil motor, a second slider is slidably connected to the second slide rail, and a second grating scale is arranged on the left side of the second slider and the second slide rail. The second slider, the second slide rail and the second grating scale are fixedly connected to the base. The upper clamping plate connection system and the lower clamping plate connection system are symmetrically arranged; The lower connecting plate clamping system includes an upper plate, a first gasket arranged below the upper plate, and a second gasket arranged below the first gasket. The lower connecting plate is connected between the first gasket and the second gasket, a lower plate is connected below the second gasket, a third force sensor is arranged below the lower plate, a third voice coil motor is arranged below the third force sensor, the third voice coil motor is fixedly arranged on the base, guide rods are arranged at both ends of the upper plate, the guide rods penetrate through the lower plate and are fixedly connected to the base, and guide bushings are arranged between the guide rods and the lower plate; The mobile system includes a number of single mobile systems. Each single mobile system includes a fifth grating scale, a fifth slide rail disposed on the right side of the fifth grating scale, and a fifth slider slidably connected to the fifth slide rail. Above the fifth slider, a fourth voice coil motor is provided. Above the fourth voice coil motor, a fourth force sensor is provided. Above the fourth force sensor, a third crossed roller bearing is provided. Above the third crossed roller bearing, a third connecting seat is provided. Above the third connecting seat, a sixth grating scale is provided. On one side of the sixth grating scale, a sixth slide rail and a sixth slider slidably connected to the sixth slide rail are provided. The sixth grating scale, the sixth slide rail, and the sixth slider are fixedly connected to the lower clamping plate. The left side of the fourth voice coil motor is connected to a connecting plate, and the left side of the connecting plate is connected to a stepping motor. Above the connecting plate, a push rod is provided.

2. The multi-functional experimental platform for bolt loosening test according to claim 1, characterized in that: The upper clamping plate connection system includes an upper clamping plate, a third slide rail disposed above the upper clamping plate, and a third slider slidably connected to the third slide rail. A third grating scale is connected to the third slider. Below the third grating scale, a second connecting seat is connected. Below the second connecting seat, a second crossed roller bearing is provided. Below the second crossed roller bearing, a second force sensor is provided. Below the second force sensor, a second voice coil motor is provided. Below the second voice coil motor, a fourth slide rail is provided. A fourth slider is slidably connected to the fourth slide rail. On the left side of the fourth slider and the fourth slide rail, a fourth grating scale is provided. The fourth slider, the fourth slide rail, and the fourth grating scale are fixedly connected to the support.

Images