Nut anti-loosening test device

Abstract

This invention relates to the technical field of nut loosening resistance testing equipment, specifically a nut loosening resistance testing device, including a mounting platform. A support mechanism is provided at the upper middle part of the fixing device, a tightening device is provided at the upper end of the mounting platform, and a shaking device is provided at the lower part of the inner cavity of the mounting platform. The beneficial effect of this invention is that an intelligent preload sensor is embedded in the upper end of the annular plate of the support mechanism. Its detection end is in close contact with the lower end face of the nut to be tested, which can collect the preload value between the nut and the bolt in real time during the test, and simultaneously transmit the monitoring data to the electronic control system. It can capture the preload decay trend in real time. When the preload drops to a preset threshold, it can automatically trigger the electronic control system alarm and link the shaking device to stop. It can accurately record the critical shaking parameters when the nut loosens, realize the integration of real-time monitoring of preload, data traceability and abnormal early warning, and greatly improve the accuracy and reliability of test data.

Description

Technical Field

[0001] This invention relates to the technical field of nut loosening resistance testing equipment, specifically a nut loosening resistance testing device. Background Technology

[0002] Threaded connections between nuts and bolts are the most widely used detachable connection type in the field of mechanical equipment. They are widely used in various mechanical equipment such as automobiles, rail transportation, aerospace, and wind power. The stability of the connection is directly related to the operational safety and service life of the equipment. During the long-term operation of mechanical equipment, under the influence of complex working conditions such as lateral vibration and alternating loads, the preload between the nut and bolt will gradually decrease, making it easy for relative rotation to occur, which will lead to loosening and failure of the connection. In severe cases, it can cause equipment failure and safety accidents, resulting in huge economic losses and safety hazards.

[0003] To ensure the safe operation of mechanical equipment, it is necessary to accurately test the anti-loosening performance of nuts, thus leading to the development of various nut anti-loosening testing devices. Currently, existing nut anti-loosening testing devices still have several shortcomings in practical applications: First, the shaking amplitude of the shaking device is inconvenient to adjust, making it unable to flexibly adapt to testing needs under different working conditions, resulting in poor versatility; second, existing devices generally lack compatible intelligent sensors, making it impossible to collect and monitor the preload between the nut and bolt in real time during the test. They can only judge the preload decay through post-testing, failing to capture the dynamic decay trend of the preload, and unable to automatically warn and stop the machine when the preload drops to a critical value. This results in insufficient accuracy and reliability of the test data, making it impossible to accurately record the critical parameters of nut loosening, and hindering the integration of preload monitoring, data traceability, and anomaly warning, thus failing to meet the requirements of high-precision and intelligent testing.

[0004] To address the shortcomings of the existing technologies, there is an urgent need to develop a nut anti-loosening testing device that is structurally sound, securely fixed, has adjustable sway amplitude, is highly versatile, and can monitor preload force in real time using intelligent sensors. This device would solve the problems existing in the current technologies, improve the accuracy, intelligence level, and testing efficiency of nut anti-loosening testing, and meet the testing needs of various scenarios. Summary of the Invention

[0005] The purpose of this invention is to provide a nut anti-loosening test device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A nut anti-loosening test device includes a mounting platform, characterized in that: a mounting frame is provided in the middle of the inner cavity of the mounting platform, a fixing device is provided in the middle of the mounting frame, a support mechanism is provided in the middle of the upper end of the fixing device, a tightening device is provided at the upper end of the mounting platform, and a shaking device is provided in the lower part of the inner cavity of the mounting platform. The tightening device includes a mounting frame, which is fixedly installed on the upper end of the mounting platform. A lifting mechanism is provided in the middle of the outer surface of the mounting frame, and a tightening machine is provided in the lower part of the outer surface of the lifting mechanism. A socket wrench is provided at the output end of the tightening machine. The mounting frame includes a sliding plate, which is slidably mounted on the inner surface of the mounting platform. A fixing plate is provided in the middle of the sliding plate, and positioning plates are fixedly mounted on both sides of the inner cavity of the sliding plate. Limiting plates are provided on both sides of the outer surface of the sliding plate, and the two limiting plates are slidably mounted on the bottom wall of the inner cavity of the mounting platform.

[0007] Preferably, the fixing device includes a positioning platform, which is fixedly installed at the upper middle part of the fixing plate. The outer surfaces of the positioning platform are respectively fixedly connected to the outer surfaces of the two positioning plates. A fixing mechanism is provided in the middle of the positioning platform. A transmission component is provided on one side of the outer surface of the fixing mechanism, and a pushing mechanism is provided on the other side of the outer surface of the fixing mechanism. Both the transmission component and the pushing mechanism are fixedly installed in the inner wall of the positioning platform. The fixing mechanism includes a circular fixing frame, the upper end of which is provided with a plurality of limiting holes, a driven member is rotatably installed in the lower part of the inner cavity of the circular fixing frame, and a plurality of clamping members are slidably installed in the upper end of the driven member; The driven component includes a transmission disk, which is rotatably mounted in the lower part of the inner cavity of a circular fixed frame. An arc-shaped rack is provided on one side of the outer surface of the transmission disk, and multiple end-to-end sliding grooves are provided at the upper end of the transmission disk.

[0008] Preferably, the clamping component includes a clamping block, the lower part of the outer surface of the clamping block is slidably connected to the inner cavity surface of the corresponding slide groove, a limit block is provided at the upper end of the clamping block, the outer surface of the limit block is slidably connected to the inner surface of the corresponding limit hole, a hydraulic telescopic rod is provided on one inner wall of the clamping block, and a limit plate is provided at the extended end of the hydraulic telescopic rod.

[0009] Preferably, the transmission component includes a transmission rod, which is rotatably mounted on the inner wall of the positioning platform. A gear is provided at the lower end of the transmission rod, which meshes with an arc-shaped rack. A positioning knob is slidably mounted in the middle of the transmission rod. Multiple positioning slots are provided on the upper end of the positioning platform surrounding the transmission rod, and the positioning knob is adapted to the multiple positioning slots.

[0010] Preferably, the pushing mechanism includes a hydraulic cylinder, which is fixedly installed on the inner wall of the positioning platform. The output end of the hydraulic cylinder is provided with a hydraulic component, which is fixedly installed on the inner wall of the positioning platform. A hydraulic oil pipe is connected to the upper part of the outer surface of the hydraulic component. The hydraulic oil pipe is fixedly installed in the middle of the outer surface of the circular fixed frame. Multiple hydraulic branch pipes are provided on the inner surface of the hydraulic oil pipe. One end of the multiple hydraulic branch pipes extends into the inner cavity of the circular fixed frame. One outer surface of the multiple hydraulic branch pipes is fixedly connected to the outer surface of the multiple hydraulic telescopic rods, and the inner cavities of the multiple hydraulic branch pipes are respectively connected to the inner cavities of the multiple hydraulic telescopic rods.

[0011] Preferably, the support mechanism includes a support plate, which is fixedly installed on the upper end of the positioning platform. The inner surface of the support plate is provided with multiple fixing grooves. An annular plate is provided in the middle of the inner cavity of the support plate. Multiple L-shaped blocks are provided at the lower end of the annular plate. The multiple L-shaped blocks are adapted to the multiple fixing grooves. Multiple slots are provided at the upper connection between the support plate and the annular plate. Limit pins are provided in the multiple slots. An intelligent preload sensor is embedded in the upper end of the annular plate.

[0012] Preferably, the shaking device includes a motor, which is fixedly installed in the inner wall of the mounting platform. The output end of the motor is provided with a transmission component two, which is rotatably installed in the inner wall of the mounting platform. The upper end of the transmission component two is provided with a shaking mechanism, which is rotatably installed on the bottom wall of the inner cavity of the mounting platform. A connecting rod is rotatably installed on the outer surface of the shaking mechanism, and a sliding handle is rotatably installed on one side of the outer surface of the connecting rod. The sliding handle is slidably installed on the bottom wall of the inner cavity of the mounting platform.

[0013] Preferably, the swaying mechanism includes a second transmission disk, which is rotatably mounted on the bottom wall of the inner cavity of the mounting platform. A transmission handle is rotatably mounted in the middle of the second transmission disk, and the lower part of the transmission handle is fixedly connected to the second transmission component. A driven disk is rotatably mounted on the upper end of the second transmission disk, and a fixing component is provided on one side of the inner wall of the driven disk. The second transmission disc includes a transmission disc, which is rotatably mounted on the bottom wall of the inner cavity of the mounting platform. A connecting handle is provided at the upper end of the transmission disc, and an arc-shaped hole is provided on one side of the upper end of the transmission disc. The transmission handle includes a second transmission rod, which is rotatably mounted in the middle of the transmission circular plate. A second gear is provided at the upper end of the second transmission rod, and the lower end of the second transmission rod is fixedly connected to a second transmission component.

[0014] Preferably, the driven disk includes a driven disc, a limiting frame is provided on one side of the upper end of the driven disc, the inner surface of the limiting frame is rotatably connected to the outer surface of the connecting handle, a connecting ring is rotatably mounted on the outer surface of the driven disc, the outer surface of the connecting ring is fixedly connected to the outer surface of the connecting rod, a second limiting hole is provided in the middle of the upper end of the driven disc, an arc-shaped rack is provided on one side of the inner cavity of the second limiting hole, and the arc-shaped rack meshes with a gear.

[0015] Preferably, the fixing component includes a mounting cylinder, which is fixedly installed in the inner wall of the driven disc. A screw is threadedly connected to the middle of the mounting cylinder, and a rubber retaining ring is provided at the lower end of the screw.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the fixing device adopts a double limiting structure. The bolt is initially limited by the driving clamping component through the transmission component one, and then the bolt is further limited by the driving mechanism driving the hydraulic telescopic rod and the limiting plate two through the pushing mechanism. The double limiting function effectively prevents the bolt from shifting during the test, ensures the stability of the bolt fixing, provides a unified and stable test benchmark for subsequent tightening operations and shaking tests, and improves the accuracy of the test results.

[0017] 2. In this invention, the shaking device, through the cooperation of the transmission disc, driven disc, and fixing components, can flexibly adjust the amplitude of the reciprocating motion of the slide handle, thereby adjusting the shaking amplitude of the bolt and nut. It can simulate the vibration environment under different working conditions, adapt to the anti-loosening test requirements of nuts of different specifications and in different usage scenarios, and improve the versatility and practicality of the device.

[0018] 3. In this invention, an intelligent preload sensor is embedded in the upper end of the annular plate of the support mechanism. Its detection end is in close contact with the lower end face of the nut to be tested, which can collect the preload value between the nut and the bolt in real time during the test and transmit the monitoring data to the electronic control system in real time. The preload decay trend can be captured in real time. When the preload drops to a preset threshold, the electronic control system can be automatically triggered to alarm and the shaking device can be linked to stop. The critical shaking parameters when the nut loosens are accurately recorded, realizing the integration of real-time monitoring of preload, data traceability and abnormal early warning, which greatly improves the accuracy and reliability of test data. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the tightening device structure of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the tightening device structure of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the mounting bracket structure of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the mounting bracket structure of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the fixing device structure of the present invention; Figure 8 This is a schematic diagram of the fixing mechanism structure of the present invention; Figure 9 This is a schematic diagram of the follower structure of the present invention; Figure 10 This is a schematic diagram of the clamping component structure of the present invention; Figure 11 For the present invention Figure 8 Enlarged view of a portion of point A in the middle; Figure 12 This is a schematic diagram of the support mechanism structure of the present invention; Figure 13 This is a schematic diagram of the shaking device structure of the present invention. Figure 1 ; Figure 14 This is a schematic diagram of the shaking device structure of the present invention. Figure 2 ; Figure 15 This is a schematic diagram of the shaking device structure of the present invention. Figure 3 ; Figure 16 This is a schematic diagram of the swaying mechanism of the present invention; Figure 17 This is a schematic diagram of the transmission disc structure of the present invention. Figure 1 ; Figure 18 This is a schematic diagram of the transmission disc structure of the present invention. Figure 2 ; Figure 19 This is a schematic diagram of the driven disk structure of the present invention.

[0020] The components represented by each number in the attached diagram are listed below: 1. Mounting platform; 2. Mounting bracket; 21. Slide plate; 22. Fixing plate; 23. Positioning plate; 24. Limiting plate one; 3. Fixing device; 31. Positioning platform; 32. Fixing mechanism; 321. Circular fixing frame; 3211. Limiting hole one; 322. Clamping component; 3221. Clamping block; 3222. Limiting block; 3223. Hydraulic telescopic rod; 3224. Limiting plate two; 323. Driven component; 3231. Transmission disc one; 3232. Slide groove; 3233. Arc rack one; 33. Transmission component one; 331. Transmission rod one; 332. Positioning knob; 333. Gear one; 334. Positioning groove; 34. Pushing mechanism; 341. Hydraulic cylinder; 342. Hydraulic component; 343. Hydraulic oil pipe; 344. Hydraulic branch pipe; 4. Support mechanism 41. Support plate; 411. Fixing groove; 42. Annular plate; 421. L-shaped block; 422. Limit pin; 5. Tightening device; 51. Mounting frame; 52. Lifting mechanism; 53. Tightening machine; 54. Socket wrench; 6. Shaking device; 61. Motor; 62. Shaking mechanism; 621. Transmission plate II; 6211. Transmission circular plate; 6212. Connecting handle; 6213. Arc-shaped hole; 622 6221. Transmission handle; 6222. Transmission rod II; 6222. Gear II; 623. Driven disc; 6231. Driven disc; 6232. Connecting ring; 6233. Limiting hole II; 6234. Limiting frame; 6235. Arc-shaped rack II; 624. Fixing component; 6241. Mounting cylinder; 6242. Screw; 6243. Rubber retaining ring; 63. Connecting rod; 64. Slide handle; 65. Transmission component II. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1, as Figure 1 - Figure 19 As shown, this embodiment discloses a nut anti-loosening test device, including a mounting platform 1, a mounting frame 2 is provided in the middle of the inner cavity of the mounting platform 1, a fixing device 3 is provided in the middle of the mounting frame 2, a support mechanism 4 is provided in the middle of the upper end of the fixing device 3, a tightening device 5 is provided at the upper end of the mounting platform 1, and a shaking device 6 is provided in the lower part of the inner cavity of the mounting platform 1.

[0023] Specifically, when it is necessary to test the anti-loosening performance of a nut, the staff first removes the relevant components from the support mechanism 4, then passes the bolt through the support mechanism 4 and places it into the inner cavity of the fixing device 3. Next, the fixing device 3 is controlled to securely fix the bolt. After that, the staff selects a component that matches the nut to be tested and assembles it on the upper part of the support mechanism 4. Then, the nut to be tested is placed on the bolt. At this time, the tightening device 5 outputs power and drives the nut to rotate, so that the nut is securely assembled on the upper end of the support mechanism 4. After the above assembly is completed, the shaking device 6 drives the fixing device 3 and the support mechanism 4 to shake rapidly and synchronously through the mounting bracket 2 to simulate the vibration environment under actual working conditions in order to carry out the nut anti-loosening test.

[0024] To achieve precise tightening of the nut and ensure consistency of the testing benchmark, such as Figure 3 and Figure 4 As shown, the tightening device 5 includes a mounting frame 51, which is fixedly installed on the upper end of the mounting platform 1. A lifting mechanism 52 is provided in the middle of the outer surface of the mounting frame 51, and a tightening machine 53 is provided in the lower part of the outer surface of the lifting mechanism 52. A socket wrench 54 is provided at the output end of the tightening machine 53.

[0025] Specifically, after the fixing device 3 completes the fixing of the bolt, the lifting mechanism 52 outputs power to drive the tightening machine 53 and the socket wrench 54 to move downwards synchronously until the socket wrench 54 is precisely engaged with the nut to be tested on the bolt. Then, the tightening machine 53 starts and drives the socket wrench 54 to rotate until the nut is firmly engaged with the upper end of the support mechanism 4. During this process, the tightening machine 53 needs to precisely control the tightening torque of the nut to ensure that its tightening degree is completely consistent with the design requirements, so as to provide a standard and unified test benchmark for subsequent anti-loosening tests and ensure the accuracy and reliability of the test results.

[0026] Furthermore, the socket wrench 54 at the bottom of the tightening machine 53 adopts a replaceable structure, which can flexibly replace the appropriate socket wrench 54 according to the size and specifications of the nut to be tested, thereby realizing the anti-loosening performance test of nuts of different sizes and specifications and improving the versatility of the device.

[0027] To drive the fixed device 3 and the support mechanism 4 to achieve stable shaking, and to simulate the vibration conditions during actual service, such as... Figure 5 and Figure 6 As shown, the mounting frame 2 includes a slide plate 21, which is slidably mounted on the inner surface of the mounting platform 1. A fixing plate 22 is provided in the middle of the slide plate 21, and positioning plates 23 are fixedly mounted on both sides of the inner cavity of the slide plate 21. Limiting plates 24 are provided on both sides of the outer surface of the slide plate 21, and the two limiting plates 24 are slidably mounted on the bottom wall of the inner cavity of the mounting platform 1.

[0028] Specifically, when the shaking device 6 outputs power, it can directly drive the fixed plate 22 to shake. Since the slide plate 21 is slidably mounted on the inner surface of the mounting platform 1, when the fixed plate 22 shakes, it can simultaneously drive the fixed device 3 and the support mechanism 4 fixed on its upper end to shake together. Among them, the two positioning plates 23 are used to position and fix the fixed device 3 to prevent the fixed device 3 from being displaced during the shaking process. The two limiting plates 24 are slidably mounted on the bottom wall of the inner cavity of the mounting platform 1. During the process of the shaking device 6 driving the slide plate 21 to move through the fixed plate 22, they can limit and guide the movement trajectory of the slide plate 21 to ensure the stability of the movement of the slide plate 21, thereby ensuring the smoothness of the shaking of the fixed device 3 and the support mechanism 4.

[0029] To ensure the bolts are securely fixed and to prevent them from loosening or shifting during testing, thus guaranteeing the smooth conduct of the test, such as... Figure 7 As shown, the fixing device 3 includes a positioning platform 31, which is fixedly installed at the upper middle part of the fixing plate 22. The outer surfaces of the positioning platform 31 are fixedly connected to the outer surfaces of the two positioning plates 23 on both sides. A fixing mechanism 32 is provided in the middle of the positioning platform 31. A transmission component 33 is provided on one side of the outer surface of the fixing mechanism 32, and a pushing mechanism 34 is provided on the other side of the outer surface of the fixing mechanism 32. Both the transmission component 33 and the pushing mechanism 34 are fixedly installed in the inner wall of the positioning platform 31.

[0030] Specifically, after the operator places the bolt into the inner cavity of the fixing mechanism 32, the operator controls the operation of the fixing mechanism 32 by operating the transmission component 33. During the operation of the fixing mechanism 32, the lower part of the bolt can be initially limited. Subsequently, the operator controls the push mechanism 34 to start. After the push mechanism 34 runs, it drives the relevant components in the fixing mechanism 32 to move further, thereby achieving a secondary limit on the lower part of the bolt. Through the double limit structure, the bolt is ensured to remain in a stable and fixed state throughout the test.

[0031] To achieve precise positioning and fixing of bolts, such as Figure 8 As shown, the fixing mechanism 32 includes a circular fixing frame 321. The upper end of the circular fixing frame 321 is provided with a plurality of limiting holes 3211. A follower 323 is rotatably installed in the lower part of the inner cavity of the circular fixing frame 321. A plurality of clamping parts 322 are slidably installed in the upper end of the follower 323.

[0032] Furthermore, such as Figure 9 As shown, the driven member 323 includes a transmission disk 3231, which is rotatably mounted in the lower part of the inner cavity of the circular fixed frame 321. An arc-shaped rack 3233 is provided on one side of the outer surface of the transmission disk 3231, and multiple end-to-end grooves 3232 are provided at the upper end of the transmission disk 3231.

[0033] Furthermore, such as Figure 9and Figure 10 As shown, the clamping component 322 includes a clamping block 3221. The lower part of the outer surface of the clamping block 3221 is slidably connected to the inner cavity surface of the corresponding slide groove 3232. A limit block 3222 is provided at the upper end of the clamping block 3221. The outer surface of the limit block 3222 is slidably connected to the inner surface of the corresponding limit hole 3211. A hydraulic telescopic rod 3223 is provided on one inner wall of the clamping block 3221. A limit plate 3224 is provided at the extended end of the hydraulic telescopic rod 3223.

[0034] Specifically, when the bolt is placed in the middle of the circular fixing frame 321, the lower end of the bolt makes precise contact with the upper end of the driven member 323. Then, the operator rotates the transmission member 33, which drives the transmission disk 3231 to rotate synchronously through the arc rack 3233. During the rotation of the transmission disk 3231, the clamping block 3221 will rotate with it. However, since the limiting block 3222 is slidably connected to the inner surface of the limiting hole 3211, and the clamping block 3221 is slidably connected to the sliding groove 3232 at the upper end of the transmission disk 3231, under the double limiting action, the space enclosed by the middle of the multiple clamping blocks 3221 will gradually shrink or expand. When the space shrinks inward, the inner surface of the multiple clamping blocks 3221 is tightly attached to the outer surface of the bolt, thereby achieving the initial limiting of the bolt.

[0035] Furthermore, after the multiple clamping blocks 3221 have completed the initial limiting of the bolt, the staff controls the push mechanism 34 to output power, which drives the hydraulic telescopic rod 3223 to retract. During the retraction of the hydraulic telescopic rod 3223, the limiting plate 3224 moves downward simultaneously, so that the limiting plate 3224 is tightly attached to the outer surface of the bolt, thereby achieving secondary limiting of the bolt. Through the double limiting structure, the stability of the bolt fixing is effectively improved, and the bolt displacement is prevented during the test.

[0036] To drive the driven member 323 to rotate stably and to achieve the limiting action of the clamping member 322 on the bolt, such as Figure 9 and Figure 11 As shown, the transmission component 33 includes a transmission rod 331, which is rotatably mounted on the inner wall of the positioning platform 31. A gear 333 is provided at the lower end of the transmission rod 331, which meshes with an arc-shaped rack 3233. A positioning knob 332 is slidably mounted in the middle of the transmission rod 331. Multiple positioning grooves 334 are provided on the upper end of the positioning platform 31 surrounding the transmission rod 331. The positioning knob 332 is adapted to the multiple positioning grooves 334.

[0037] Specifically, when the operator needs to activate the fixing mechanism 32, the positioning knob 332 is first pulled upwards, causing its lower part to disengage from the inner cavity of the multiple positioning slots 334, thus releasing the limiting effect of the positioning slots 334 on the positioning knob 332. Then, the positioning knob 332 is rotated, which drives the gear 333 to rotate synchronously through the transmission rod 331. When the gear 333 rotates, it drives the arc rack 3233 to rotate through meshing, thereby driving the driven member 323 to move, achieving the initial limiting of the bolt by the clamping member 322. After the multiple clamping blocks 3221 have completed the initial limiting of the bolt, the positioning knob 332 is pressed, causing its lower part to re-enter the inner cavity of the corresponding positioning slot 334. The positioning knob 332 is then limited by the positioning slots 334, thereby fixing the position of the transmission rod 331 and ensuring that the limiting state of the bolt by the clamping member 322 remains stable.

[0038] To ensure stable operation of the hydraulic telescopic rod 3223 and achieve secondary limiting of the bolts, such as... Figure 10 As shown, the pushing mechanism 34 includes a hydraulic cylinder 341, which is fixedly installed on the inner wall of the positioning platform 31. The output end of the hydraulic cylinder 341 is provided with a hydraulic component 342, which is fixedly installed on the inner wall of the positioning platform 31. A hydraulic oil pipe 343 is connected to the upper part of the outer surface of the hydraulic component 342. The hydraulic oil pipe 343 is fixedly installed in the middle of the outer surface of the circular fixed frame 321. A plurality of hydraulic branch pipes 344 are provided on the inner surface of the hydraulic oil pipe 343. One end of the plurality of hydraulic branch pipes 344 extends into the inner cavity of the circular fixed frame 321. One side of the outer surface of the plurality of hydraulic branch pipes 344 is fixedly connected to the outer surface of the plurality of hydraulic telescopic rods 3223, and the inner cavity of the plurality of hydraulic branch pipes 344 is respectively connected to the inner cavity of the plurality of hydraulic telescopic rods 3223.

[0039] Specifically, after the multiple clamping blocks 3221 complete the initial limiting of the bolt, the operator controls the hydraulic cylinder 341 to start. The hydraulic cylinder 341 outputs power to drive the hydraulic component 342 to run. During the operation of the hydraulic component 342, the hydraulic oil is drawn out from the inner cavity of the multiple hydraulic telescopic rods 3223 through the hydraulic oil pipe 343 and multiple hydraulic branch pipes 344, so that the multiple hydraulic telescopic rods 3223 retract synchronously, thereby driving the multiple limiting plates 3224 to move downward, so that the limiting plates 3224 are tightly attached to the outer surface of the bolt, realizing the secondary limiting of the bolt and further improving the stability of the bolt fixing.

[0040] To accommodate nuts and bolts of different sizes and specifications, and to ensure that the nuts can be securely fitted to the upper end of the support mechanism 4, such as... Figure 12As shown, the support mechanism 4 includes a support plate 41, which is fixedly installed on the upper end of the positioning platform 31. The inner surface of the support plate 41 is provided with multiple fixing grooves 411. An annular plate 42 is provided in the middle of the inner cavity of the support plate 41. Multiple L-shaped blocks 421 are provided at the lower end of the annular plate 42. The multiple L-shaped blocks 421 are adapted to the multiple fixing grooves 411. Multiple slots are provided at the upper connection between the support plate 41 and the annular plate 42. Limit pins 422 are provided in the multiple slots. An intelligent preload sensor is embedded in the upper end of the annular plate 42.

[0041] Specifically, since the size and specifications of the nuts to be tested vary, the sizes of the bolts they are compatible with also vary. In order to facilitate the fixing of bolts of different sizes by the staff, and to ensure that the nuts can be securely assembled on the upper end of the support mechanism 4, the annular plate 42 with the corresponding hole diameter needs to be replaced according to the size and specifications of the bolts and nuts.

[0042] Furthermore, after the fixing device 3 has completed fixing the bolts, the operator selects an annular plate 42 that matches the size of the nut and bolt to be tested, places it on the upper end of the support plate 41, and makes the multiple L-shaped blocks 421 at the lower end of the annular plate 42 respectively embed into the inner cavity of the corresponding fixing groove 411. Then, the annular plate 42 is rotated so that the L-shaped blocks 421 are tightly fitted with the inner cavity surface of the fixing groove 411, thus achieving the initial fixing of the annular plate 42 and the support plate 41. After that, the limiting pin 422 is embedded in the slot between the support plate 41 and the annular plate 42 to achieve precise positioning and stable fixing of the annular plate 42 and the support plate 41. After the above assembly is completed, the tightening device 5 can rotate and tighten the nut so that the nut is stably assembled on the upper end of the annular plate 42.

[0043] Furthermore, the intelligent preload sensor embedded at the upper end of the annular plate 42 has its detection end in close contact with the lower end face of the nut to be tested. This intelligent preload sensor can collect the preload value between the nut and bolt in real time during the test and transmit the monitoring data to the device's electronic control system in real time. It can capture the preload decay trend in real time. When the preload drops to a preset threshold, it can automatically trigger the electronic control system to issue an alarm signal and simultaneously link the shaking device 6 to stop, ensuring that the critical shaking parameters when the nut loosens can be accurately recorded, improving the accuracy and reliability of the test data, and realizing the integration of real-time monitoring of preload, data traceability and abnormal early warning.

[0044] Example 2 further improves upon Example 1 by modifying the shaking device 6 to achieve adjustable shaking amplitude of the bolt and nut, adapting to testing requirements under different working conditions, such as... Figure 13 — Figure 15As shown, the shaking device 6 includes a motor 61, which is fixedly installed in the inner wall of the mounting platform 1. The output end of the motor 61 is provided with a transmission component 65, which is rotatably installed in the inner wall of the mounting platform 1. The upper end of the transmission component 65 is provided with a shaking mechanism 62, which is rotatably installed on the bottom wall of the inner cavity of the mounting platform 1. A connecting rod 63 is rotatably installed on the outer surface of the shaking mechanism 62, and a sliding handle 64 is rotatably installed on one side of the outer surface of the connecting rod 63. The sliding handle 64 is slidably installed on the bottom wall of the inner cavity of the mounting platform 1.

[0045] Specifically, after the bolts and nuts are fixed and assembled, the motor 61 is started. The motor 61 outputs power to drive the shaking mechanism 62 to rotate through the transmission component 65. During the rotation of the shaking mechanism 62, the connecting rod 63 moves synchronously. Under the drive of the shaking mechanism 62, the connecting rod 63 drives the sliding handle 64 to reciprocate along the bottom wall of the inner cavity of the mounting platform 1. When the sliding handle 64 reciprocates, it simultaneously drives the bolts and nuts to shake rapidly through the mounting frame 2, the fixing device 3 and the support mechanism 4, simulating the vibration environment under different working conditions and carrying out the nut loosening resistance test.

[0046] To achieve adjustable reciprocating distance of the slider 64 and adapt to vibration testing requirements of different amplitudes, such as... Figure 16 As shown, the swaying mechanism 62 includes a second transmission disk 621, which is rotatably mounted on the bottom wall of the inner cavity of the mounting platform 1. A transmission handle 622 is rotatably mounted in the middle of the second transmission disk 621. The lower part of the transmission handle 622 is fixedly connected to the second transmission component 65. A driven disk 623 is rotatably mounted on the upper end of the second transmission disk 621. A fixing component 624 is provided on one side of the inner wall of the driven disk 623.

[0047] Specifically, during the nut loosening test, the required vibration amplitude varies in different scenarios. Therefore, it is necessary to adjust the distance of the reciprocating motion of the sliding handle 64 driven by the shaking mechanism 62 through the connecting rod 63. During adjustment, the operator first manually operates the fixing part 624 to release the fixing effect of the fixing part 624 on the transmission disk 621. Then, the motor 61 is started. The motor 61 outputs power to drive the transmission handle 622 to rotate through the transmission part 65. When the transmission handle 622 rotates, it drives the driven disk 623 to rotate relative to the transmission disk 621. During this process, the transmission disk 621 remains stationary, thereby changing the distance between the central axis of the driven disk 623 and the central axis of the transmission disk 621. This change in distance directly changes the amplitude of the reciprocating motion of the sliding handle 64.

[0048] Furthermore, when the driven disk 623 rotates to the preset position and the reciprocating motion amplitude of the slide handle 64 reaches the test requirement, the operator operates the fixing component 624 again to fix the transmission disk 621 and the driven disk 623, keeping them relatively stationary. At this time, when the transmission handle 622 rotates, it can drive the transmission disk 621 and the driven disk 623 to rotate synchronously. During the synchronous rotation of the driven disk 623, the connecting rod 63 drives the slide handle 64 to reciprocate, and the reciprocating motion amplitude remains stable, meeting the test requirements of the corresponding working condition.

[0049] To achieve the reciprocating motion of the slider 64, and to facilitate adjustment of the reciprocating motion amplitude, such as... Figure 17 and Figure 18 As shown, the transmission disc 621 includes a transmission disc 6211, which is rotatably mounted on the bottom wall of the inner cavity of the mounting platform 1. A connecting handle 6212 is provided at the upper end of the transmission disc 6211, and an arc-shaped hole 6213 is provided on one side of the upper end of the transmission disc 6211.

[0050] Furthermore, such as Figure 17 As shown, the transmission handle 622 includes a transmission rod 6221, which is rotatably mounted in the middle of the transmission circular plate 6211. A gear 6222 is provided at the upper end of the transmission rod 6221, and the lower end of the transmission rod 6221 is fixedly connected to the transmission component 65.

[0051] Furthermore, such as Figure 19 As shown, the driven disk 623 includes a driven disk 6231. A limit frame 6234 is provided on one side of the upper end of the driven disk 6231. The inner surface of the limit frame 6234 is rotatably connected to the outer surface of the connecting handle 6212. A connecting ring 6232 is rotatably installed on the outer surface of the driven disk 6231. The outer surface of the connecting ring 6232 is fixedly connected to the outer surface of the connecting rod 63. A second limit hole 6233 is provided in the middle of the upper end of the driven disk 6231. An arc-shaped rack 6235 is provided on one side of the inner cavity of the second limit hole 6233. The arc-shaped rack 6235 meshes with a gear 6222.

[0052] Furthermore, such as Figure 17 As shown, the fastener 624 includes a mounting cylinder 6241, which is fixedly installed in the inner wall of the driven disc 6231. The middle part of the mounting cylinder 6241 is threadedly connected to a screw 6242, and a rubber retaining ring 6243 is provided at the lower end of the screw 6242.

[0053] Specifically, when it is necessary to change the distance between the central axis of the transmission disc 621 and the driven disc 623 to adjust the reciprocating motion amplitude of the slide 64, the operator first rotates the screw 6242. Under the action of the thread, the screw 6242 drives the rubber retaining ring 6243 to move downward, causing the rubber retaining ring 6243 to disengage from the tight fit with the lower end of the transmission disc 6211, thus releasing the fixing effect of the fixing component 624 on the transmission disc 6211. At this time, the motor 61 is started. The motor 61 drives the transmission rod 6221 and the gear 6222 to rotate synchronously through the transmission component 65. The gear 6222 drives the arc rack 6235 to rotate through the meshing action, thereby driving the driven disc 6231 to rotate relative to the transmission disc 6211.

[0054] Furthermore, since the transmission plate 6211 and the driven disc 6231 are rotatably connected to the limiting frame 6234 through the connecting handle 6212, when the gear 6222 drives the driven disc 6231 to rotate through the arc rack 6235, the fixing member 624 will slide along the inner cavity of the arc hole 6213, and at the same time the gear 6222 will slide along the inner cavity of the limiting hole 6233, ensuring the stable rotation of the driven disc 6231.

[0055] Furthermore, when the driven disc 6231 rotates to the preset position and the reciprocating motion amplitude of the slide handle 64 reaches the test requirement, the operator rotates the screw 6242 in the opposite direction, so that the rubber fixing ring 6243 is tightly fitted with the lower end of the transmission disc 6211 again. The relative fixation of the transmission disc 6211 and the driven disc 6231 is achieved through the fixing member 624. At this time, when the transmission rod 6221 rotates, the transmission disc 6211 and the driven disc 6231 rotate synchronously under the synergistic action of the connecting handle 6212 and the fixing member 624.

[0056] Furthermore, since the central axes of the transmission disc 6211 and the driven disc 6231 are not on the same straight line, when the driven disc 6231 rotates, it drives the connecting rod 63 to swing through the connecting ring 6232, which in turn drives the slide 64 to reciprocate, and the amplitude of the reciprocating motion remains stable, thus meeting the test requirements.

[0057] Furthermore, the inner cavity of the arc-shaped hole 6213 is equipped with an angle sensor and a displacement sensor, which can collect the rotation angle and eccentric distance of the driven disc 6231 relative to the transmission disc 6211 in real time, and feed the signal back to the control system to realize the precise calibration and automatic adjustment of the sway amplitude.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nut anti-loosening test device, comprising a mounting platform (1), characterized in that: The mounting platform (1) has a mounting frame (2) in the middle of its inner cavity, a fixing device (3) in the middle of its middle, a support mechanism (4) in the middle of the upper end of the fixing device (3), a tightening device (5) in the upper end of its upper cavity, and a shaking device (6) in the lower part of its inner cavity. The tightening device (5) includes a mounting frame (51), which is fixedly installed on the upper end of the mounting platform (1). A lifting mechanism (52) is provided in the middle of the outer surface of the mounting frame (51), and a tightening machine (53) is provided in the lower part of the outer surface of the lifting mechanism (52). A socket wrench (54) is provided at the output end of the tightening machine (53). The mounting frame (2) includes a sliding plate (21), which is slidably mounted on the inner surface of the mounting platform (1). A fixing plate (22) is provided in the middle of the sliding plate (21), and positioning plates (23) are fixedly mounted on both sides of the inner cavity of the sliding plate (21). Limiting plates (24) are provided on both sides of the outer surface of the sliding plate (21), and the two limiting plates (24) are slidably mounted on the bottom wall of the inner cavity of the mounting platform (1).

2. The nut anti-loosening test device according to claim 1, characterized in that: The fixing device (3) includes a positioning platform (31), which is fixedly installed in the middle of the upper end of the fixing plate (22). The outer surfaces of the positioning platform (31) are respectively fixedly connected to the outer surfaces of the two positioning plates (23). A fixing mechanism (32) is provided in the middle of the positioning platform (31). A transmission component (33) is provided on one side of the outer surface of the fixing mechanism (32), and a pushing mechanism (34) is provided on the other side of the outer surface of the fixing mechanism (32). The transmission component (33) and the pushing mechanism (34) are both fixedly installed in the inner wall of the positioning platform (31). The fixing mechanism (32) includes a circular fixing frame (321), the upper end of which is provided with a plurality of limiting holes (3211), a follower (323) is rotatably installed in the lower part of the inner cavity of the circular fixing frame (321), and a plurality of clamping parts (322) are slidably installed in the upper end of the follower (323). The driven member (323) includes a transmission disk (3231), which is rotatably mounted on the lower part of the inner cavity of the circular fixed frame (321). An arc-shaped rack (3233) is provided on one side of the outer surface of the transmission disk (3231), and a plurality of end-to-end grooves (3232) are provided on the upper end of the transmission disk (3231).

3. The nut anti-loosening test device according to claim 2, characterized in that: The clamping component (322) includes a clamping block (3221). The lower part of the outer surface of the clamping block (3221) is slidably connected to the inner cavity surface of the corresponding slide groove (3232). A limit block (3222) is provided at the upper end of the clamping block (3221). The outer surface of the limit block (3222) is slidably connected to the inner surface of the corresponding limit hole (3211). A hydraulic telescopic rod (3223) is provided on one inner wall of the clamping block (3221). A limit plate (3224) is provided at the extended end of the hydraulic telescopic rod (3223).

4. The nut anti-loosening test device according to claim 3, characterized in that: The transmission component 1 (33) includes a transmission rod 1 (331), which is rotatably mounted on the inner wall of the positioning platform (31). A gear 1 (333) is provided at the lower end of the transmission rod 1 (331), which meshes with an arc-shaped rack 1 (3233). A positioning knob (332) is slidably mounted in the middle of the transmission rod 1 (331). Multiple positioning slots (334) are provided on the upper end of the positioning platform (31) around the transmission rod 1 (331), and the positioning knob (332) is adapted to the multiple positioning slots (334).

5. The nut anti-loosening test device according to claim 3, characterized in that: The pushing mechanism (34) includes a hydraulic cylinder (341), which is fixedly installed on the inner wall of the positioning platform (31). The output end of the hydraulic cylinder (341) is provided with a hydraulic component (342), which is fixedly installed on the inner wall of the positioning platform (31). The upper part of the outer surface of the hydraulic component (342) is connected to a hydraulic oil pipe (343). The hydraulic oil pipe (343) is fixedly installed in the middle of the outer surface of the circular fixed frame (321). The inner surface of the hydraulic oil pipe (343) is provided with multiple hydraulic branch pipes (344). One end of the multiple hydraulic branch pipes (344) extends into the inner cavity of the circular fixed frame (321). One side of the outer surface of the multiple hydraulic branch pipes (344) is fixedly connected to the outer surface of the multiple hydraulic telescopic rods (3223), and the inner cavity of the multiple hydraulic branch pipes (344) is respectively connected to the inner cavity of the multiple hydraulic telescopic rods (3223).

6. The nut anti-loosening test device according to claim 2, characterized in that: The support mechanism (4) includes a support plate (41), which is fixedly installed on the upper end of the positioning platform (31). The inner surface of the support plate (41) is provided with multiple fixing grooves (411). An annular plate (42) is provided in the middle of the inner cavity of the support plate (41). Multiple L-shaped blocks (421) are provided at the lower end of the annular plate (42). The multiple L-shaped blocks (421) are adapted to the multiple fixing grooves (411). Multiple slots are provided at the upper connection between the support plate (41) and the annular plate (42). Limit pins (422) are provided in the multiple slots. An intelligent pre-tightening force sensor is embedded in the upper end of the annular plate (42).

7. The nut anti-loosening test device according to claim 1, characterized in that: The shaking device (6) includes a motor (61), which is fixedly installed in the inner wall of the mounting platform (1). The output end of the motor (61) is provided with a transmission component (65), which is rotatably installed in the inner wall of the mounting platform (1). The upper end of the transmission component (65) is provided with a shaking mechanism (62), which is rotatably installed on the bottom wall of the inner cavity of the mounting platform (1). A connecting rod (63) is rotatably installed on the outer surface of the shaking mechanism (62), and a sliding handle (64) is rotatably installed on one side of the outer surface of the connecting rod (63). The sliding handle (64) is slidably installed on the bottom wall of the inner cavity of the mounting platform (1).

8. The nut anti-loosening test device according to claim 7, characterized in that: The swaying mechanism (62) includes a second transmission disk (621), which is rotatably mounted on the bottom wall of the inner cavity of the mounting platform (1). A transmission handle (622) is rotatably mounted in the middle of the second transmission disk (621). The lower part of the transmission handle (622) is fixedly connected to the second transmission component (65). A driven disk (623) is rotatably mounted on the upper end of the second transmission disk (621). A fixing component (624) is provided on one side of the inner wall of the driven disk (623). The second transmission disc (621) includes a transmission disc (6211), which is rotatably mounted on the inner wall of the mounting platform (1). The upper end of the transmission disc (6211) is provided with a connecting handle (6212), and an arc-shaped hole (6213) is opened on one side of the upper end of the transmission disc (6211). The transmission handle (622) includes a second transmission rod (6221), which is rotatably mounted on the middle part of the transmission circular plate (6211). A second gear (6222) is provided at the upper end of the second transmission rod (6221), and the lower end of the second transmission rod (6221) is fixedly connected to the second transmission component (65).

9. A nut anti-loosening test device according to claim 8, characterized in that: The driven disk (623) includes a driven disk (6231). A limit frame (6234) is provided on one side of the upper end of the driven disk (6231). The inner surface of the limit frame (6234) is rotatably connected to the outer surface of the connecting handle (6212). A connecting ring (6232) is rotatably installed on the outer surface of the driven disk (6231). The outer surface of the connecting ring (6232) is fixedly connected to the outer surface of the connecting rod (63). A second limit hole (6233) is provided in the middle of the upper end of the driven disk (6231). An arc-shaped rack (6235) is provided on one side of the inner cavity of the second limit hole (6233). The arc-shaped rack (6235) meshes with a gear (6222).

10. A nut anti-loosening test device according to claim 9, characterized in that: The fastener (624) includes a mounting cylinder (6241), which is fixedly installed in the inner wall of the driven disc (6231). The mounting cylinder (6241) is threadedly connected to a screw (6242) in the middle, and a rubber retaining ring (6243) is provided at the lower end of the screw (6242).

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