A bolt loosening detection device adapted to bolts of different lengths

Abstract

The present invention relates to the technical field of bolt loosening detection, and discloses a bolt loosening detection device suitable for bolts of different lengths, comprising a base plate, a plurality of support columns are fixed on the base plate, a mounting base is fixed on the upper ends of the plurality of support columns, a support plate is inserted on the mounting base, two symmetrical pressure sensors are fixed on the support plate and the mounting base, a nut fixing plate is arranged above the support plate, a guide rail assembly for horizontal movement of the nut fixing plate is arranged on the support plate, a vibrator is arranged on one side of the support plate, so that the purpose of adjusting the screw engagement height of bolts of different lengths can be achieved during the tightening process of the bolts, so that bolts of different lengths can be firmly tightened with suitable nuts on the test device, which saves time and labor, is convenient and quick, can adapt to the detection of bolts of different lengths, and thus improves the application scope of the device.

Description

Technical Field

[0001] The invention relates to the technical field of bolt loosening detection, and in particular to a bolt loosening detection device adapted for bolts of different lengths. Background Art

[0002] The main purpose of bolt loosening detection is to ensure the safety and stability of equipment and prevent potential safety hazards. Bolts, as a common connection element, are widely used in industries such as railway bridges, wind turbine towers, and building structures. However, due to long-term use and environmental changes, bolt loosening may cause instability and safety hazards in equipment. Therefore, it is crucial to conduct bolt loosening detection. Through detection, the problem of bolt loosening can be discovered and solved, thereby ensuring the safe operation of the equipment and avoiding equipment damage or accidents caused by bolt loosening. Bolt loosening detection mostly uses vibration testing. The principle of vibration testing is to apply a load perpendicular to the bolt axis on the bolt connection, and observe the reaction of the bolt under vibration to detect the looseness of the bolt connection. This test method can effectively simulate the vibration environment in actual use, thereby accurately evaluating the reliability and durability of the bolt connection.

[0003] At present, during the vibration test of bolt loosening, it is necessary to manually insert the bolt into the device and fix it with a wrench, and use a matching sleeve workpiece to manually tighten the nut firmly on the tested bolt. Due to the large variety of bolts and the diversity of lengths and sizes, and the fixed depth of the sleeve workpiece, when the thick and short bolts are connected with the matching nuts, the sleeve workpiece can be inserted into the nut for tightening, and the end of the bolt will not hit the sleeve workpiece. When some slender bolts are connected with the matching nuts, as the nut rotates on the bolt, the end will hit the sleeve workpiece, and the nut cannot be fixed on the bolt. The sleeve workpiece cannot adapt to bolts of different lengths. At this time, other tools need to be used for tightening. The tightening process is time-consuming and labor-intensive, and greatly affects the efficiency of bolt loosening detection. Summary of the invention

[0004] The present invention provides a bolt loosening detection device that is suitable for bolts of different lengths. The device has the advantages that bolts of different lengths can be firmly tightened with matching nuts on the test device, which saves time and effort and is convenient and fast. It solves the problem mentioned in the above background technology that bolts of different lengths cannot be tightened during the detection process, thereby affecting the test efficiency.

[0005] The present invention provides the following technical solution: a bolt loosening detection device adapted to bolts of different lengths, comprising a bottom plate, a plurality of support columns are fixed on the bottom plate, a mounting base is fixed on the upper ends of the plurality of support columns, a support plate is inserted on the mounting base, two symmetrical pressure sensors are fixed on the support plate and the mounting base, a nut fixing plate is arranged above the support plate, a guide rail assembly for horizontal movement of the nut fixing plate is arranged on the support plate, a vibrator is arranged on one side of the support plate, an output end of the vibrator is connected to the nut fixing plate, and a card slot is opened on the nut fixing plate and the mounting base;

[0006] A fixing plate is arranged below the mounting base, an electric screwdriver bit is fixed on the fixing plate, a lifting assembly for adjusting the working height of the electric screwdriver bit is fixed on the bottom plate, a hexagonal screwdriver bit is arranged above the electric screwdriver bit, and the hexagonal screwdriver bit is elastically connected to the output end of the electric screwdriver bit through a first spring.

[0007] As an optional solution of the bolt loosening detection device adapted to bolts of different lengths described in the present invention, wherein: the guide rail assembly includes a track, the track is fixed on the support plate, and slide grooves are provided on both sides of the track, a clamping block is fixed under the nut fixing plate, and a first slider is provided on both sides of the clamping block, and the first slider is slidably connected in the slide groove.

[0008] As an optional scheme of the bolt loosening detection device adapted to bolts of different lengths described in the present invention, wherein: the lifting assembly includes a mounting frame, the mounting frame is fixed to the base plate, the mounting frame is rotatably connected to a screw rod, the screw rod is threadedly connected to a threaded block, a servo motor is fixed to the upper end of the mounting frame, the motor shaft of the servo motor is transmission-connected to one end of the screw rod, two first guide rods are fixed to the mounting frame, the two first guide rods are slidably connected to a second slider, the threaded block is fixedly connected to the second slider, and one end of the fixed plate is fixed to the second slider.

[0009] As an optional solution of the bolt loosening detection device adapted to bolts of different lengths described in the present invention, an L-shaped mounting plate is fixed to one side of the support plate, a triangular reinforcing rib is fixed to the L-shaped mounting plate, and the vibrator is mounted on the L-shaped mounting plate.

[0010] As an optional solution of the bolt loosening detection device adapted to bolts of different lengths described in the present invention, the upper end of the electric screwdriver bit is provided with a rectangular insertion portion, the hexagonal screwdriver bit is provided with a rectangular slot, and the rectangular insertion portion is inserted into the rectangular slot.

[0011] As an alternative solution of the bolt loosening detection device for adapting bolts of different lengths according to the present invention, the following is provided: above the nut fixing plate, there is a U-shaped block, on both sides of the U-shaped block, there are limit clamping strips, the limit clamping strips are elastically connected to the U-shaped block through second springs, and one end of the limit clamping strip is provided with an inclined surface.

[0012] As an alternative solution of the bolt loosening detection device for adapting bolts of different lengths according to the present invention, the following is provided: on the bottom plate, there is an L-shaped bracket fixed, and on the L-shaped bracket, there is an electric push rod fixed for adjusting the horizontal movement position of the U-shaped block.

[0013] As an alternative solution of the bolt loosening detection device for adapting bolts of different lengths according to the present invention, the following is provided: on the support plate, there is a guide groove provided, in the guide groove, there is a sliding rod arranged, both sides of the sliding rod are fixed on the support plate, on the sliding rod, there is a vertical rod slidably connected, the vertical rod is elastically connected to the support plate through a third spring, the third spring is sleeved on the vertical rod, on one side of the U-shaped block, there is a U-shaped abutting block, and the U-shaped abutting block is fixed on the upper end of the vertical rod.

[0014] As an alternative solution of the bolt loosening detection device for adapting bolts of different lengths according to the present invention, the following is provided: on one side of the installation base, there is a second guide rod fixed, on the second guide rod, there is a abutting wedge block slidably connected, the abutting wedge block is elastically connected to the second guide rod through a fourth spring, and the abutting wedge block abuts against the lower end of the vertical rod.

[0015] As an alternative solution of the bolt loosening detection device for adapting bolts of different lengths according to the present invention, the following is provided: on one side of the hexagonal bit, there is a rotating block provided, on the rotating block, there is an abutting block provided, and the abutting block is elastically connected to the rotating block through a torsion spring.

[0016] The present invention has the following beneficial effects:

[0017] 1. In the bolt loosening detection device adapted to bolts of different lengths, through the nut fixing plate and the card slots opened on the mounting base, it is convenient to place the test bolt, the gasket sleeved on the bolt, and the nut initially screwed on the bolt onto the device together, greatly improving the convenience of bolt feeding. The installed pressure sensor is convenient for detecting the change of the tightening force between the bolt and the nut during the vibration test, facilitating the detection of bolt loosening. The vibrator arranged on one side of the support plate provides a vibration source for bolt loosening detection. The electric bit fixed on the fixing plate drives the hex bit to rotate. When the hex bit is inserted into the hex slot at the bottom of the bolt, it can drive the bolt to rotate, facilitating the quick screwing and tightening of the bolt and the nut. The lifting component fixed on the bottom plate can conveniently adjust the working height of the electric bit, achieving the purpose of adjusting the screwing height of bolts of different lengths during the tightening process, enabling bolts of different lengths to be firmly tightened with the adapted nuts on the test device, saving time and effort, being convenient and fast, and being able to adapt to the detection of bolts of different lengths, thereby improving the application range of the device.

[0018] 2. In the bolt loosening detection device adapted to bolts of different lengths, the L-shaped bracket fixed on the bottom plate can fix the electric push rod. When the electric push rod is connected to the U-shaped block, it can achieve the purpose of adjusting the horizontal position of the U-shaped block, enabling the U-shaped block to be stuck on the test nut. The two sides of the U-shaped block are elastically connected to the limit card strip through the second spring. Under the action of the second spring, the limit card strip can be pressed against nuts of different sizes, achieving the purpose of limiting the nut, and preventing the nut from rotating synchronously with the bolt during the tightening process, which affects the tightening effect of the bolt. When the inclined surface provided on the limit card strip contacts nuts of different sizes, the nut can automatically adjust its angle under the influence of the contact force, so that the side surface of the nut can better fit on the two limit card strips, realizing the limitation of the nut.

[0019] 3. The bolt loosening detection device adapted to bolts of different lengths. When a slender bolt is tightened, the U-shaped contact block fixed on the vertical rod remains stationary. At the same time, the lower end of the vertical rod can be in contact with the contact wedge block. During the vertical movement of the electric bit, it can drive the hexagonal bit to move upward synchronously. During the movement, the contact block on one side of the hexagonal bit can be in contact with the contact wedge block, so that the hexagonal bit can slide on the rectangular insertion part of the electric bit, thereby restricting the working height of the hexagonal bit, facilitating the detection device to have enough space to place the slender bolt. The electric push rod can push the U-shaped block to move horizontally. When the U-shaped block drives the limit card strip to be stuck on a nut with a small size, at the same time, the U-shaped contact block fixed on the vertical rod can be inserted into the gap between the U-shaped block and the limit card strip in the initial state, achieving the purpose of limiting the limit card strip, facilitating the improvement of the firmness of the nut position during the tightening process of the slender bolt, and preventing the nut from rotating and affecting the bolt tightening effect. When a short and thick bolt is tightened, the short and thick bolt can be directly placed on the device. When the electric push rod pushes the U-shaped block to move horizontally, the U-shaped block can drive the limit card strip to be stuck on a nut with a large size. At the same time, the end face of the U-shaped contact block and the limit card strip can be in contact, causing the vertical rod to move horizontally under the influence of the contact force, releasing the contact with the contact wedge block. The contact wedge block can move horizontally away from the hexagonal bit, facilitating the lifting component to drive the electric bit and the hexagonal bit to move vertically synchronously, and being able to be stuck on the short and thick bolt during the movement for tightening treatment. For bolts with different lengths and different adapted nuts, the height of the hexagonal bit can be adaptively adjusted according to the size of the nut, enabling bolts of different lengths to tighten the bolts and nuts at the same rising height, improving the detection range of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 One of the three-dimensional structure diagrams of the present invention.

[0021] Figure 2 Another three-dimensional structure diagram of the present invention.

[0022] Figure 3 Another three-dimensional structure diagram of the present invention.

[0023] Figure 4 Cross-sectional view of the structure of the bolt loosening detection device of the present invention.

[0024] Figure 5 Working schematic diagram of nut limiting of the present invention.

[0025] Figure 6 is Figure 2 Local enlarged schematic diagram at A in

[0026] Figure 7 is Figure 4 Partial enlarged schematic diagram at position B in the middle.

[0027] In the figure: 1, bottom plate; 2, support column; 3, mounting base; 4, support plate; 41, track; 42, chute; 43, clamping block; 44, first slider; 5, pressure sensor; 6, nut fixing plate; 7, vibrator; 8, card slot; 9, fixing plate; 10, electric bit; 101, mounting frame; 102, lead screw; 103, threaded block; 104, servo motor; 105, first guide rod; 106, second slider; 11, hex bit; 12, first spring; 13, L-shaped mounting plate; 14, triangular reinforcing rib plate; 15, rectangular insertion part; 16, rectangular slot; 17, U-shaped block; 18, limit card strip; 19, second spring; 20, inclined surface; 21, L-shaped bracket; 22, electric push rod; 23, guide groove; 24, sliding rod; 25, vertical rod; 26, third spring; 27, U-shaped contact block; 28, second guide rod; 29, contact wedge block; 30, fourth spring; 31, rotating block; 32, contact block; 33, torsion spring. Specific implementation mode

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment 1

[0030] Please refer to Figure 1-Figure 7 , a bolt loosening detection device adapted to bolts of different lengths, including a bottom plate 1, several support columns 2 are fixed on the bottom plate 1, an installation base 3 is fixed at the upper ends of several support columns 2, a support plate 4 is inserted on the installation base 3, two symmetric pressure sensors 5 are fixed on the support plate 4 and the installation base 3, a nut fixing plate 6 is arranged above the support plate 4, a guide rail assembly for the horizontal movement of the nut fixing plate 6 is arranged on the support plate 4, a vibrator 7 is arranged on one side of the support plate 4, the output end of the vibrator 7 is connected to the nut fixing plate 6, and card slots 8 are opened on the nut fixing plate 6 and the installation base 3;

[0031] A fixing plate 9 is arranged below the installation base 3, an electric bit 10 is fixed on the fixing plate 9, a lifting assembly for adjusting the working height of the electric bit 10 is fixed on the bottom plate 1, a hex bit 11 is arranged above the electric bit 10, and the hex bit 11 is elastically connected to the output end of the electric bit 10 through a first spring 12.

[0032] The guide rail assembly includes a rail 41, which is fixed on the support plate 4. Slide grooves 42 are provided on both sides of the rail 41. A clamping block 43 is fixed below the nut fixing plate 6. First sliders 44 are provided on both sides of the clamping block 43. The first slider 44 is slidably connected in the slide groove 42.

[0033] The lifting assembly includes a mounting frame 101, which is fixed on the base plate 1, and is rotatably connected to a screw rod 102, and is threadedly connected to a threaded block 103 on the screw rod 102. A servo motor 104 is fixed to the upper end of the mounting frame 101, and the motor shaft of the servo motor 104 is transmission-connected to one end of the screw rod 102. Two first guide rods 105 are fixed to the mounting frame 101, and a second slider 106 is slidably connected to the two first guide rods 105. The threaded block 103 is fixedly connected to the second slider 106, and one end of the fixed plate 9 is fixed to the second slider 106.

[0034] An L-shaped mounting plate 13 is fixed to one side of the support plate 4 , a triangular reinforcing rib 14 is fixed to the L-shaped mounting plate 13 , and the vibrator 7 is mounted on the L-shaped mounting plate 13 .

[0035] A rectangular inserting portion 15 is disposed at the upper end of the electric screwdriver bit 10 , a rectangular slot 16 is provided on the hexagonal screwdriver bit 11 , and the rectangular inserting portion 15 is inserted into the rectangular slot 16 .

[0036] refer to Figure 1-Figure 4, Initial state of workpiece testing. A gasket is sleeved on the bolt, and at the same time, the upper end of the bolt and the nut are initially screwed together. Through the nut fixing plate 6 and the card slot 8 opened on the mounting base 3, it is convenient to load the bolt, nut, and gasket together from the side of the detection device, greatly improving the feeding speed of the bolt to be tested. The servo motor 104 set in the lifting assembly drives the lead screw 102 to rotate, prompting the threaded block 103 to drive the second slider 106 to move vertically on the two first guide rods 105, so that the electric bit 10 fixed on the fixing plate 9 moves vertically. The hexagonal bit 11 slidably connected to the electric bit 10 can be inserted into the hexagonal socket at the bottom of the test bolt. When the electric bit 10 works, it can drive the hexagonal bit 11 to rotate, prompting the test bolt to rotate synchronously, thus facilitating the threaded connection of the nut. As the height of the electric bit 10 is adjusted, it is convenient to tighten the test bolt and the nut. After the test bolt is tightened, the lifting assembly adjusts the position of the electric bit 10 so that the hexagonal bit 11 is separated from the bolt. At the same time, the pressure sensor 5 measures the tightening force of the bolt. The vibrator 7 is started, and the vibration force generated by the vibrator 7 acts on the nut fixing plate 6. The block 43 fixed below the nut fixing plate 6 is slidably connected to the chute 42 provided on the track 41 through the first slider 44, so that the nut fixing plate 6 slides on the support plate 4 under the action of the vibration force, and the loosening detection of the test bolt can be carried out. During the test process, observe the numerical change of the pressure sensor 5. If the test value of the pressure sensor 5 becomes smaller, there is looseness between the bolt and the nut quality inspection.

[0037] The triangular reinforcing rib plate 14 fixed on the L-shaped mounting plate 13 is beneficial to improving the bearing capacity of the L-shaped mounting plate 13, facilitating the vibrator 7 to stably output the vibration amplitude during operation. The rectangular insertion part 15 provided at the upper end of the electric bit 10 is adapted to the rectangular slot 16 opened on the hexagonal bit 11, facilitating the height adjustment of the hexagonal bit 11 at the output end of the electric bit 10. At the same time, the electric bit 10 can also drive the electric bit 10 to rotate, achieving the purpose of adjusting the height of the screwed bolts of different lengths during the process of bolt screwing, prompting the bolts of different lengths to be firmly tightened with the matching nuts on the test device, saving time and effort, being convenient and fast, and being able to adapt to the detection of bolts of different lengths, thus improving the application range of the device.

[0038] Embodiment 2. This embodiment is an improvement made on the basis of Embodiment 1. Specifically, please refer to Figure 1-Figure 7 , Above the nut fixing plate 6, there is a U-shaped block 17. On both sides of the U-shaped block 17, there are limit card strips 18. The limit card strips 18 are elastically connected to the U-shaped block 17 through the second spring 19, and one end of the limit card strip 18 is provided with an inclined surface 20.

[0039] A fixing plate 1 is fixed with an L-shaped bracket 21, and the L-shaped bracket 21 is fixed with an electric push rod 22 for adjusting the horizontal moving position of the U-shaped block 17.

[0040] During the process of tightening the bolt, in order to improve the detection and tightening effect of the bolt and the nut, it is necessary to limit the position of the nut to prevent the nut from rotating synchronously with the bolt. Refer to Figure 2-Figure 5 , when limiting the small-sized nut adapted to the slender test bolt, the electric push rod 22 fixed on the L-shaped bracket 21 can drive the U-shaped block 17 to move horizontally for adjustment, so that the U-shaped block 17 can be stuck on the tested nut. At the same time, with the cooperation of the second spring 19 and the limit card strip 18, the limit card strip 18 is urged to abut against the side surface of the tested nut, realizing the limitation of the nut. When limiting the large-sized nut adapted to the short and thick test bolt, the electric push rod 22 can drive the U-shaped block 17 to move horizontally for adjustment. The inclined surface 20 provided on the limit card strip 18 abuts against the side surface of the nut, and the second spring 19 stores energy, causing the position of the limit card strip 18 to change conveniently, and it can be adjusted adaptively according to the size of the nut, so that the limit card strip 18 firmly abuts against the side surface of the nut to limit it. As the end of the electric push rod 22 continues to output, the U-shaped block 17 is completely stuck on the nut, preventing the short and thick bolt from rotating during the tightening process with the nut and affecting the tightening effect. Secondly, when the inclined surface 20 provided on the limit card strip 18 abuts against nuts of different sizes, the nut can be automatically adjusted in angle under the influence of the abutting force, so that the side surface of the nut can better fit on the two limit card strips 18, realizing the limitation of the nut.

[0041] Embodiment 3 is an improvement made on the basis of Embodiment 2. Specifically, please refer to Figure 1-Figure 7 , a guide groove 23 is formed on the support plate 4, a sliding rod 24 is arranged in the guide groove 23, both sides of the sliding rod 24 are fixed on the support plate 4, a vertical rod 25 is slidably connected to the sliding rod 24, and the vertical rod 25 is elastically connected to the support plate 4 through a third spring 26. The third spring 26 is sleeved on the vertical rod 25. One side of the U-shaped block 17 is provided with a U-shaped abutting block 27, and the U-shaped abutting block 27 is fixed to the upper end of the vertical rod 25.

[0042] One side of the installation base 3 is fixed with a second guide rod 28, a abutting wedge block 29 is slidably connected to the second guide rod 28, the abutting wedge block 29 is elastically connected to the second guide rod 28 through a fourth spring 30, and the abutting wedge block 29 abuts against the lower end of the vertical rod 25.

[0043] One side of the hexagon bit 11 is provided with a rotating block 31, a abutting block 32 is arranged on the rotating block 31, and the abutting block 32 is elastically connected to the rotating block 31 through a torsion spring 33.

[0044] For bolts with different lengths and matching nuts, the position of the hexagonal bit 11 can be adjusted adaptively according to the size of the nut. Refer to Figure 4 and Figure 7 . When tightening a slender bolt, the U-shaped抵触块27 fixed on the vertical rod 25 remains stationary, and at the same time, the third spring 26 is also stationary. At the same time, the lower end of the vertical rod 25 can be in contact with the抵触楔块29, and the position of the抵触楔块29 remains unchanged. As the electric bit 10 moves vertically, one side of the hexagonal bit 11 is in contact with one end of the抵触楔块29 through the rotating block 31 elastically connected by the torsion spring 33. Affected by the contact force, the position of the hexagonal bit 11 remains unchanged, and the torsion spring 33 and the first spring 12 are蓄力, leaving enough space above the hexagonal bit 11 to facilitate placing the slender bolt, small-sized nut, and gasket in the card slots 8 opened on the nut fixing plate 6 and the mounting base 3, avoiding interference from the position of the hexagonal bit 11 with the placement of the slender bolt. At the same time, the electric push rod 22 pushes the U-shaped block 17 to move horizontally so that the U-shaped block 17 completely clamps on the small-sized nut, which can prompt the U-shaped抵触块27 fixed on the vertical rod 25 to insert into the gap between the U-shaped block 17 and the limit card strip 18, achieving the purpose of limiting the limit card strip 18, facilitating the improvement of the firmness of the nut position during the tightening process of the slender bolt, and avoiding the rotation of the nut from affecting the bolt tightening effect. When the lifting component drives the electric bit 10 to continue moving, the torsion spring 33 stops蓄力, the rotating block 31 deflects to解除 the contact with the抵触楔块29, and the first spring 12 releases its elastic force, prompting the hexagonal bit 11 to slide on the rectangular insertion part 15, which can drive the slender bolt to move upward and abut against the mounting base 3. When the electric bit 10 stops moving at a certain height, through the cooperation of the first spring 12 and the hexagonal bit 11, the slender bolt moves upward and abuts against the mounting base 3. During the movement, the slender bolt can be tightened by rotating the electric bit 10;

[0045] It should be noted that there may be some inaccuracies in the translation due to the unclear meaning of some specific terms in the original text. You may need to further clarify the relevant content for a more accurate translation.When dealing with the tightening of short and thick bolts, through the clamping groove 8 opened on the device, it is convenient for the bolts, nuts and gaskets to be loaded from the side of the detection device together. Then, the electric push rod 22 pushes the U-shaped block 17 to move horizontally. The U-shaped block 17 drives the limit clamping strip 18 to be stuck on the nut with a larger size. The second spring 19 stores energy. The U-shaped contact block 27 is in contact with the end face of the limit clamping strip 18. When the end of the electric push rod 22 continues to extend outwards, the U-shaped block 17 pushes the U-shaped contact block 27 to move horizontally, prompting the vertical rod 25 to move horizontally on the sliding rod 24 in the guiding groove 23. The third spring 26 stores energy, enabling the vertical rod 25 to release the contact with the抵触 wedge block 29. The抵触 wedge block 29 can move horizontally on the second guiding rod 28 under the action of the elastic force of the fourth spring 30, making one end of the抵触 wedge block 29 move away from the rotating block 31. The lifting assembly conveniently drives the electric bit 10 to move vertically, prompting the hexagonal bit 11 to be stuck at the bottom of the short and thick bolt. When the electric bit 10 moves to a certain height, through the cooperation of the first spring 12 and the hexagonal bit 11, the short and thick bolt moves upwards to abut against the installation base 3. During the movement, the short and thick bolt can be tightened by rotating the electric bit 10. For bolts with different lengths and different matching nuts, the height of the hexagonal bit 11 can be adaptively adjusted according to the size of the nut, improving the applicable range for detecting the looseness of bolts with different lengths. It can achieve the tightening treatment of bolts and nuts for bolts with different lengths at the same rising height, improving the detection range of the device.

[0046] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device.

[0047] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A bolt loosening detection device adapted to bolts of different lengths, comprising a base plate (1), characterized in that: A plurality of support columns (2) are fixed on the bottom plate (1). An installation base (3) is fixed at the upper ends of the plurality of support columns (2). A support plate (4) is inserted on the installation base (3). Two symmetrical pressure sensors (5) are fixed on the support plate (4) and the installation base (3). A nut fixing plate (6) is arranged above the support plate (4). A guide rail assembly for the horizontal movement of the nut fixing plate (6) is arranged on the support plate (4). A vibrator (7) is arranged on one side of the support plate (4). The output end of the vibrator (7) is connected to the nut fixing plate (6). A clamping groove (8) is formed on the nut fixing plate (6) and the installation base (3). A fixing plate (9) is arranged below the installation base (3). An electric bit (10) is fixed on the fixing plate (9). A lifting assembly for adjusting the working height of the electric bit (10) is fixed on the bottom plate (1). A hex bit (11) is arranged above the electric bit (10). The hex bit (11) is elastically connected to the output end of the electric bit (10) through a first spring (12). A U-shaped block (17) is arranged above the nut fixing plate (6). Limiting card strips (18) are arranged on both sides of the U-shaped block (17). The limiting card strips (18) are elastically connected to the U-shaped block (17) through second springs (19). One end of the limiting card strip (18) is provided with an inclined surface (20). An L-shaped bracket (21) is fixed on the bottom plate (1). An electric push rod (22) for adjusting the horizontal movement position of the U-shaped block (17) is fixed on the L-shaped bracket (21). A guide groove (23) is formed on the support plate (4). A sliding rod (24) is arranged in the guide groove (23). Both sides of the sliding rod (24) are fixed on the support plate (4). A vertical rod (25) is slidably connected to the sliding rod (24). The vertical rod (25) is elastically connected to the support plate (4) through a third spring (26). The third spring (26) is sleeved on the vertical rod (25). A U-shaped abutting block (27) is arranged on one side of the U-shaped block (17). The U-shaped abutting block (27) is fixed at the upper end of the vertical rod (25). A second guide rod (28) is fixed on one side of the installation base (3). A abutting wedge block (29) is slidably connected to the second guide rod (28). The abutting wedge block (29) is elastically connected to the second guide rod (28) through a fourth spring (30). The abutting wedge block (29) abuts against the lower end of the vertical rod (25).

2. The bolt loosening detection device adapted to bolts of different lengths according to claim 1 is characterized in that: The guide rail assembly includes a track (41). The track (41) is fixed on the support plate (4). Chute grooves (42) are formed on both sides of the track (41). A clamping block (43) is fixed below the nut fixing plate (6). First sliders (44) are arranged on both sides of the clamping block (43). The first sliders (44) are slidably connected in the chute grooves (42).

3. The bolt loosening detection device adapted to bolts of different lengths according to claim 2 is characterized in that: The lifting assembly comprises a mounting frame (101), wherein the mounting frame (101) is fixed on the base plate (1), a screw rod (102) is rotatably connected to the mounting frame (101), a threaded block (103) is threadedly connected to the screw rod (102), a servo motor (104) is fixed to the upper end of the mounting frame (101), a motor shaft of the servo motor (104) is transmission-connected to one end of the screw rod (102), two first guide rods (105) are fixed to the mounting frame (101), a second slider (106) is slidably connected to the two first guide rods (105), the threaded block (103) is fixedly connected to the second slider (106), and one end of the fixed plate (9) is fixed to the second slider (106).

4. The bolt loosening detection device adapted to bolts of different lengths according to claim 3 is characterized in that: An L-shaped mounting plate (13) is fixed to one side of the support plate (4), a triangular reinforcing rib (14) is fixed to the L-shaped mounting plate (13), and the vibrator (7) is mounted on the L-shaped mounting plate (13).

5. The bolt loosening detection device adapted to bolts of different lengths according to claim 4 is characterized in that: The upper end of the electric screwdriver bit (10) is provided with a rectangular insertion portion (15), the hexagonal screwdriver bit (11) is provided with a rectangular slot (16), and the rectangular insertion portion (15) is inserted into the rectangular slot (16).

6. The bolt loosening detection device adapted to bolts of different lengths according to claim 5, characterized in that: A rotating block (31) is arranged on one side of the hexagonal screwdriver bit (11), a resisting block (32) is arranged on the rotating block (31), and the resisting block (32) is elastically connected to the rotating block (31) via a torsion spring (33).

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