A tower crane anti-loosening early warning bolt, early warning nut and early warning fastening device

Abstract

The application relates to the technical field of early warning fastener, in particular to a tower crane anti-loosening early warning bolt, an early warning nut and an early warning fastening device. The tower crane anti-loosening early warning bolt comprises a bolt body, a first elastic contact assembly, a first PCB, a first battery, a sealing cover and a first alarm. The bolt body comprises a head and a shank which are connected with each other. The first PCB is fixed on the end face of the head away from the shank. The first battery and the first alarm are both mounted on the first PCB and are seamlessly wrapped by the sealing cover. The head is provided with penetrating holes, and one first elastic contact assembly is mounted in each penetrating hole. One end of the first elastic contact assembly is fixed to the first PCB, and the other end is exposed from the head when not compressed. The alarm mechanism is arranged on the bolt, which makes up for the deficiency of alarm failure caused by possible loosening of the early warning nut. The early warning bolt collects the pressure information of the first elastic contact assembly through the first PCB, and when the early warning bolt is loosened, the pressure is reduced, so that the first alarm can be started to give an alarm.

Description

Technical Field

[0001] This application relates to the field of early warning fastener technology, and more specifically, to a tower crane anti-loosening early warning bolt, an early warning nut, and an early warning fastening device. Background Technology

[0002] Tower cranes, also known as tower hoists, are primarily used for the vertical and horizontal transport of materials and the installation of building components during construction. As crucial construction equipment, tower crane malfunctions can severely impact project progress and result in significant economic losses.

[0003] In actual use, the height of tower cranes means that the assembled cranes are constantly swaying, which can easily lead to loosening of fastening bolts. Loose bolts are often a major cause of malfunctions. Loose bolts reduce the stability of the tower crane's structural connections, increasing the risk of overturning and, in severe cases, potentially causing injury or death. Therefore, regularly inspecting and tightening bolts is a crucial measure to prevent tower crane collapse and protect the lives of workers.

[0004] The current method for checking bolt tightness involves adding a warning nut to the outside of the fastening nut. The warning nut has contacts on the side facing the fastening nut. The warning nut includes a housing and internal electronic components; the contacts pass through the housing and connect to the internal electronic components. The housing is typically made of plastic. The warning nut usually also has an anti-loosening screw, which presses the housing of the warning nut against the bolt from the side, ensuring a constant relative position between the warning nut and the bolt. When the relative position of the fastening nut and bolt changes, for example, if they move further apart axially by more than 1 mm, the fastening nut presses against the contacts, triggering a "flashing" warning from the warning nut. This allows the system to sense the position of the fastening nut through the contacts and monitor the bolt's tightness in real time.

[0005] In actual use, due to the continuous swaying of the tower crane, the warning nuts with anti-loosening screws still frequently come loose and come off. Summary of the Invention

[0006] In view of the fact that in actual use, due to the continuous swaying of the tower crane, the warning nut with anti-loosening screws still often comes loose and comes off, in order to improve this situation, this application proposes a tower crane anti-loosening warning bolt and a warning thread fastening device.

[0007] Firstly, this application proposes a tower crane anti-loosening early warning bolt.

[0008] A tower crane anti-loosening early warning bolt includes a bolt body, a first spring contact assembly, a first PCB board, a first battery, a sealing cover, and a first alarm.

[0009] The bolt body includes an end cap and a rod body that are interconnected. The first PCB board is fixed to the end face of the end cap away from the rod body. The first battery and the first alarm are both mounted on the first PCB board. The sealing cap is fixed to the end cap, and the sealing cap seamlessly covers the first PCB board, the first battery, and the first alarm.

[0010] One or more through holes parallel to the rod body are formed at the end. A first spring-loaded component is installed in each of the through holes. One end of the first spring-loaded component is fixed to the first PCB board, and the other end protrudes from the end when not under pressure.

[0011] By adopting the above technical solution, an alarm mechanism is installed on the bolt, compensating for the alarm failure caused by the potential loosening of the warning nut. In this warning bolt, the first PCB board collects pressure information from the first spring-loaded component. When the warning bolt loosens, the pressure decreases, triggering the first alarm, thus eliminating the need for other accessories. The warning bolt uses a sealing cap to seamlessly enclose the first PCB board, the first battery, and the first alarm, effectively preventing rainwater corrosion of the electronic components.

[0012] As an improvement to the tower crane anti-loosening warning bolt, the tower crane anti-loosening warning bolt also includes a wireless transmission module. The wireless transmission module is mounted on the first PCB board and is enclosed in the sealing cover.

[0013] By adopting the above technical solution, when the alarm mechanism is triggered, the warning bolt can transmit an alarm signal to a smart terminal via a wireless transmission module, such as a mobile phone or computer, to remind the management personnel that a bolt is loose so that it can be repaired.

[0014] As an improvement to the anti-loosening warning bolt for tower cranes, the first spring-loaded assembly includes an upper tube, a lower tube, and a first elastic element. The two ends of the first elastic element are respectively fixed to the upper tube and the lower tube. The lower tube is connected to the first PCB board. The upper tube protrudes from its end when not under pressure. The first PCB board is configured such that: when the pressure exerted by the first spring-loaded assembly on the first PCB board exceeds a set value, the circuit containing the alarm is disconnected; when the pressure exerted by the first spring-loaded assembly on the first PCB board is less than the set value, the circuit containing the alarm is connected.

[0015] By adopting the above technical solution, the alarm will not be triggered when the warning bolt is in a tight state with the fastened equipment. When the warning bolt loosens, the pressure received by the first spring contact component decreases, the circuit of the alarm device is connected, and the alarm is activated. This alarm mechanism is quick, and the circuit is normally disconnected, saving power and allowing the battery to be used for a longer period of time.

[0016] Secondly, this application also proposes a tower crane anti-loosening early warning nut, and adopts the following technical solution.

[0017] A tower crane anti-loosening warning nut, wherein the warning nut can be adapted to be installed on the warning bolt as described above.

[0018] The warning nut includes an upper cover, a lower cover, an elastic extension member, an extension membrane, a locking mechanism, a second PCB board, a second battery, a second alarm, and a second spring-loaded component.

[0019] The upper cover includes a connected upper inner ring and an upper outer ring, and the cross-section of the upper cover is U-shaped. The lower cover includes a connected lower inner ring and a lower outer ring, and the cross-section of the lower cover is U-shaped.

[0020] The upper inner ring connects to the lower inner ring to form a total inner ring. The upper outer ring connects to the lower outer ring to form a total outer ring.

[0021] The inner wall of the upper inner ring is engraved with an upper internal thread, and the inner wall of the lower inner ring is engraved with a lower internal thread. The upper internal thread and the lower internal thread are smoothly connected.

[0022] An annular cavity is formed between the inner ring and the outer ring. The elastic extension member is installed in the annular cavity.

[0023] The height of the inner ring is greater than the height of the outer ring, and the upper outer ring and the lower outer ring are seamlessly connected using the stretch membrane.

[0024] The locking mechanism is installed on the outer wall of the upper outer ring and the outer wall of the lower outer ring, and is configured such that the locking mechanism can fix the upper cover and the lower cover or release them.

[0025] The second PCB board is mounted within the lower cover. The second battery, the second alarm, and the second spring-loaded assembly are all mounted on the second PCB board. The second spring-loaded assembly also penetrates the end face of the lower cover away from the upper cover.

[0026] By adopting the above technical solution, before the warning nut is installed on the warning bolt, the locking mechanism fixes the upper cover and the lower cover. After installation, the locking mechanism releases the fixation of the upper cover and the lower cover. Under the action of the elastic extension member, the upper cover and the lower cover spring open in opposite directions, and the upper cover and the lower cover respectively abut tightly against the external thread of the bolt in the axial direction. Compared with conventional threaded connections, this connection method increases the axial pressure, thus increasing the friction between the upper internal thread of the upper cover and the external thread of the bolt, and increasing the friction between the lower internal thread of the lower cover and the external thread of the bolt. Therefore, under vibration, the warning nut is less likely to loosen from the bolt, thus the warning nut can more accurately monitor the loosening of the bolt and the fastening nut. The upper outer ring and the lower outer ring are seamlessly connected by the extension membrane, which can prevent rainwater from entering the interior of the upper and lower covers, effectively protecting the internal electronic components. The warning nut receives pressure through the second spring-loaded component. When the pressure setting is exceeded, the circuit of the second alarm is connected, i.e., an alarm is triggered.

[0027] As an improvement to the anti-loosening warning nut for tower cranes, the upper cover is made of transparent material. The second alarm is a light alarm. Both the upper and lower covers are hollow structures. The opposing surfaces of the upper and lower outer rings are open structures. The second alarm is located at the bottom of the lower outer ring and faces the upper outer ring.

[0028] By adopting the above technical solution, the light emitted by the second alarm can be emitted through the lower outer ring and the upper outer ring, with minimal reduction in light intensity, making it easy for external personnel to detect.

[0029] As an improvement to the tower crane anti-loosening warning nut, the warning nut includes two extension membranes, one of which is seamlessly connected to the inner wall of the upper outer ring and the inner wall of the lower outer ring, and the other of which is seamlessly connected to the outer wall of the upper outer ring and the outer wall of the lower outer ring.

[0030] By adopting the above technical solution, the two stretch membranes are connected to the inner and outer sides of the outer ring respectively, which not only strengthens the function of blocking rainwater, but also does not block the light emitted by the second alarm.

[0031] As an improvement to the anti-loosening warning nut for tower cranes, the second spring-loaded contact assembly includes a rigid rod section, a flexible rod section, and a second elastic element. The rigid rod section is connected to the flexible rod section. One end of the second elastic element is fixed to the side wall of the rigid rod section, and the other end of the second elastic element is fixed to the second PCB board. When the second spring-loaded contact assembly is not compressed, the rigid rod section extends beyond the end face of the lower cover, and the flexible rod section is suspended above the second PCB board.

[0032] By adopting the above technical solution, the flexible rod segment helps to reduce the pressure on the second PCB board under pressure, thus protecting the second PCB board. This flexible rod segment can be conductive; when it contacts the second PCB board, it can conduct electricity, causing the second alarm to activate and trigger an alarm.

[0033] As an improvement to the anti-loosening warning nut for tower cranes, the locking mechanism includes a fixing block, a lever, and a base. The fixing block is fixed to the outer wall of the upper cover. The base is fixed to the outer wall of the lower cover. One end of the lever is rotatably connected to the base. By rotating the lever, the other end of the lever can rest on the fixing block, thereby fixing the upper cover and the lower cover together. The other end of the lever can also leave the fixing block, thus releasing the mutual fixation between the upper cover and the lower cover.

[0034] By adopting the above technical solution, the locking mechanism can fix the upper cover and the lower cover before installing the warning nut onto the bolt, so as to facilitate installation. When it is necessary to increase the friction between the warning nut and the bolt, the lever can be rotated to release the fixing restriction of the upper cover and the lower cover.

[0035] Thirdly, this application also proposes a tower crane anti-loosening early warning fastening device, and adopts the following technical solution.

[0036] A tower crane anti-loosening early warning fastening device includes the aforementioned early warning bolt and early warning nut, wherein the early warning nut is adapted to be installed on the early warning bolt.

[0037] By adopting the above technical solution, both the warning bolt and the upper warning nut can trigger an alarm for loosening abnormalities, thus improving the effectiveness of abnormal warnings.

[0038] In summary, the tower crane anti-loosening warning bolt, warning nut, and warning fastening device of this application have the following beneficial effects:

[0039] Using the warning bolts and / or warning nuts of this application for bolt loosening alarm provides a highly effective alarm mechanism. In contrast, the general anti-loosening measure for warning nuts involves using anti-loosening screws to laterally compress the warning nut to the bolt. However, since this is a screw-reinforced method, similar to the loosening mechanism of bolts and fastening nuts, the anti-loosening structure of this measure is still prone to loosening during vibration, rendering the anti-loosening measure ineffective.

[0040] The warning bolt of this application can sound an alarm by means of self-sensing pressure, without the need for other devices connected to the bolt. This self-sensing pressure method directly matches the loosening mechanism, resulting in high alarm sensitivity and reliable results.

[0041] The warning nut of this application adopts the method of increasing the axial pressure of the warning nut and bolt, which increases the rotational friction of the warning nut and bolt. Under vibration, the warning nut is not easy to loosen. After the warning nut is installed after the fastening nut, the warning nut can accurately sense the looseness of the fastening nut. When the set value is reached, it can accurately sound an alarm.

[0042] The early warning fastening device of this application combines the alarm functions of early warning bolts and early warning nuts to further enhance the effectiveness of the alarm. Attached Figure Description

[0043] Figure 1 This is a front view of a tower crane anti-loosening early warning bolt according to Example 1.

[0044] Figure 2 for Figure 2 A partial exploded view of the warning bolt.

[0045] Figure 3 for Figure 2 An enlarged view of region A.

[0046] Figure 4 This is a front view of a tower crane anti-loosening early warning nut according to Example 2.

[0047] Figure 5 for Figure 4 Sectional view along line BB.

[0048] Figure 6 for Figure 4 The diagram shows the structure of the second PCB board and the components mounted on it within the warning nut.

[0049] Figure 7 for Figure 5 A partial view after hiding some lines in the sectional view.

[0050] Figure 8 for Figure 4 A bottom view of the warning nut.

[0051] Figure 9 for Figure 5 The diagram shows the structure of the second spring-loaded component mounted on the second PCB board.

[0052] Figure 10 This is a front view of a tower crane anti-loosening early warning fastening device according to Embodiment 3.

[0053] Reference numerals: 1. Warning bolt, 11. Bolt body, 12. First spring contact assembly, 13. First PCB board, 14. First battery, 15. Sealing cover, 16. First alarm, 111. End, 112. Rod body, 1111. Penetration hole, 17. Wireless transmission module, 121. Upper tube, 122. Lower tube, 123. First elastic element;

[0054] Warning nut 2, upper cover 21, lower cover 22, elastic extension member 23, extension membrane 24, locking mechanism 25, second PCB board 26, second battery 27, second alarm 28, second spring contact assembly 29, upper inner ring 211, upper internal thread 2111, upper outer ring 212, lower inner ring 221, lower outer ring 222, annular cavity 223, closed structure 224, open structure 225, rigid rod section 291, flexible rod section 292, second elastic member 293, fixing block 251, lever 252, base 253;

[0055] Tighten nut 3. Detailed Implementation

[0056] The following describes in detail some embodiments of the tower crane anti-loosening warning bolt, warning nut, and warning fastening device of this application with reference to the accompanying drawings.

[0057] Example 1

[0058] like Figure 1 and Figure 2 A tower crane anti-loosening early warning bolt 1 includes a bolt body 11, a first spring contact assembly 12, a first PCB board 13, a first battery 14, a sealing cover 15, and a first alarm 16.

[0059] The bolt body 11 includes an end 111 and a shaft 112 connected to each other. The first PCB board 13 is fixed to the end face of the end 111 away from the shaft 112.

[0060] The first battery 14 and the first alarm 16 are both mounted on the first PCB board 13. The sealing cover 15 is fixed to the end 111, and the sealing cover 15 seamlessly covers the first PCB board 13, the first battery 14, and the first alarm 16. The first alarm 16 can be an audible and visual alarm, and the sealing cover 15 is made of transparent material.

[0061] The end 111 has one or more through holes 1111 parallel to the rod body 112, for example, three parallel through holes 1111. One of the first spring-loaded components 12 is installed in each of the through holes 1111. One end of the first spring-loaded component 12 is fixed to the first PCB board 13, and the other end protrudes from the end 111 when not under pressure.

[0062] The aforementioned warning bolt 1 incorporates an alarm mechanism, overcoming the limitation of conventional warning nuts 2, which are typically tightened via side screws, and are prone to loosening, which can lead to alarm failure. When the warning bolt 1 loosens, the pressure decreases, activating the circuitry on the first PCB board 13 and triggering the first alarm 16. This warning bolt 1 can function without the aid of other accessories. The warning bolt 1 is seamlessly encased by the sealing cap 15, which prevents rainwater from corroding the electronic components.

[0063] like Figure 2 To enhance the monitoring of early warning information, a wireless transmission module 17 can be installed in the anti-loosening early warning bolt 1 of the tower crane. Specifically, the wireless transmission module 17 is installed on the first PCB board 13 and is enclosed in the sealing cover 15. When the alarm mechanism is triggered, the early warning bolt 1 can transmit an alarm signal to a smart terminal, such as a mobile phone or computer, through the wireless transmission module 17 to remind the management personnel that a bolt is loose and to carry out maintenance.

[0064] like Figure 3 In the aforementioned tower crane anti-loosening warning bolt 1, one optional structure of the first spring-loaded contact assembly 12 is as follows: the first spring-loaded contact assembly 12 includes an upper tube 121, a lower tube 122, and a first elastic element 123. The two ends of the first elastic element 123 are respectively fixed to the upper tube 121 and the lower tube 122. Both the upper tube 121 and the lower tube 122 can be empty tubes with one end closed and the other end open, with the open end of the upper tube 121 and the open end of the lower tube 122 connected, and the upper tube 121 sleeved over the lower tube 122. The first elastic element 123 can be a spring, with both ends fixed to the inner bottom surface of the upper tube 121 and the inner bottom surface of the lower tube 122.

[0065] The lower tube 122 is connected to the first PCB board 13. The upper tube 121 exposes its end 111 when not under pressure. When the pressure of the first spring-loaded assembly 12 on the first PCB board 13 is greater than a set value, the circuit containing the alarm remains disconnected. When the pressure of the first spring-loaded assembly 12 on the first PCB board 13 is less than or equal to the set value, the circuit containing the alarm is connected.

[0066] In the above settings, if the warning bolt 1 is in a tightened state, the alarm will not be triggered. When the warning bolt 1 is loosened, the pressure received by the first spring contact component 12 decreases, the circuit where the alarm is located is connected, and the alarm is activated. This alarm mechanism is quick, and the circuit is normally disconnected, saving power and allowing the battery to be used for a longer period of time.

[0067] Example 2

[0068] like Figure 4 A tower crane anti-loosening warning nut 2, wherein the warning nut 2 can be adapted to be installed on the warning bolt 1 of Embodiment 1.

[0069] like Figure 5 and Figure 6 The warning nut 2 includes an upper cover 21, a lower cover 22, an elastic extension member 23, an extension membrane 24, a locking mechanism 25, a second PCB board 26, a second battery 27, a second alarm 28, and a second spring-loaded component 29.

[0070] like Figure 7 To facilitate the demonstration of the internal structure of the warning nut 2, Figure 7 Compared to Figure 5 Some lines are concealed. The upper cover 21 includes a connected upper inner ring 211 and an upper outer ring 212, and the cross-section of the upper cover 21 is U-shaped. The lower cover 22 includes a connected lower inner ring 221 and a lower outer ring 222, and the cross-section of the lower cover 22 is U-shaped.

[0071] The upper inner ring 211 connects to the lower inner ring 221 to form a total inner ring. The upper outer ring 212 connects to the lower outer ring 222 to form a total outer ring.

[0072] like Figure 5 The inner wall of the upper inner ring 211 is engraved with an upper internal thread 2111, and the inner wall of the lower inner ring 221 is engraved with a lower internal thread. The upper internal thread and the lower internal thread are smoothly connected.

[0073] An annular cavity 223 is formed between the inner ring and the outer ring. The elastic extension member 23 is installed in the annular cavity 223. The elastic extension member 23 may be a spring, with its two ends resting against the upper and lower ends of the annular cavity 223.

[0074] The height of the inner ring is greater than the height of the outer ring, and the upper outer ring 212 and the lower outer ring 222 are seamlessly connected by the stretching membrane 24.

[0075] The locking mechanism 25 is installed on the outer wall of the upper outer ring 212 and the outer wall of the lower outer ring 222, and is configured such that the locking mechanism 25 can fix the upper cover 21 and the lower cover 22 or release them.

[0076] The second PCB board 26 is installed within the lower cover 22. The second battery 27, the second alarm 28, and the second spring-loaded assembly 29 are all installed on the second PCB board 26.

[0077] like Figure 6The warning nut 2 may include two second batteries 27, three second alarms 28, and three second spring-loaded assemblies 29. The second alarms 28 may be LED light alarms.

[0078] like Figure 8 The second spring-loaded component 29 also penetrates the end face of the lower cover 22 away from the upper cover 21.

[0079] Before installing the warning nut 2 onto the warning bolt 1, the locking mechanism 25 secures the upper cover 21 and the lower cover 22. The upper inner ring 211 and the lower inner ring 221 are flush-jointed, and the joint ends of the upper inner ring 211 and the lower inner ring 221 are preferably closed structures 224, i.e., planar joints, resulting in good stability after jointing. The upper outer ring 212 and the lower outer ring 222 are separated, and their opposite ends are open structures 225. The upper outer ring 212 and the lower outer ring 222 are seamlessly connected by an extension membrane 24. This extension membrane 24 has a certain degree of extensibility and can be a folded membrane or an elastic membrane. The elastic extension member 23 can have a small elastic force to avoid damaging the elastic membrane after fully opening.

[0080] After the warning nut 2 is installed on the warning bolt 1, the locking mechanism 25 releases the fixation of the upper cover 21 and the lower cover 22. Under the action of the elastic extension member 23, the upper cover 21 and the lower cover 22 spring open in opposite directions, and the upper cover 21 and the lower cover 22 respectively abut tightly against the external thread of the bolt in the axial direction. Compared with conventional threaded connections, the axial pressure of this connection method increases, thus increasing the friction between the upper internal thread of the upper cover 21 and the external thread of the bolt, and increasing the friction between the lower internal thread of the lower cover 22 and the external thread of the bolt. Therefore, under vibration, the warning nut 2 is less likely to loosen from the bolt, and thus the warning nut 2 can more accurately monitor the loosening of the bolt and the fastening nut 3. Among them, the upper outer ring 212 and the lower outer ring 222 are seamlessly connected by the extension membrane 24, which can prevent rainwater from entering the interior of the upper cover 21 and the lower cover 22, effectively protecting the internal electronic components. The warning nut 2 receives pressure through the second spring contact assembly 29. When the pressure setting is exceeded, the circuit of the second alarm 28 is connected, and an alarm is triggered.

[0081] The upper cover 21 is preferably made of a transparent material. The second alarm 28 can be a light alarm. Both the upper cover 21 and the lower cover 22 are hollow structures.

[0082] like Figure 7The upper outer ring 212 and the lower outer ring 222 both have open structures 225 on their opposite sides. The second alarm 28 is located at the bottom of the lower outer ring 222 and faces the upper outer ring 212. The light emitted by the second alarm 28 can be emitted through the lower outer ring 222 and the upper outer ring 212 with minimal reduction in light intensity, making it easy for outsiders to detect.

[0083] A preferred structure of the tower crane anti-loosening warning nut 2 is that the warning nut 2 includes two extension membranes 24. One extension membrane 24 is seamlessly connected to the inner wall of the upper outer ring 212 and the inner wall of the lower outer ring 222, and the other extension membrane 24 is seamlessly connected to the outer wall of the upper outer ring 212 and the outer wall of the lower outer ring 222. The two extension membranes 24 are connected to the inner and outer sides of the outer ring respectively, which not only enhances the function of blocking rainwater, but also does not block the light emitted by the second alarm 28.

[0084] like Figure 9 A preferred structure of the second spring-loaded component 29 is as follows: the second spring-loaded component 29 includes a rigid rod segment 291, a flexible rod segment 292, and a second elastic element 293. The rigid rod segment 291 is connected to the flexible rod segment 292. One end of the second elastic element 293 is fixed to the side wall of the rigid rod segment 291, and the other end of the second elastic element 293 is fixed to the second PCB board 26. When the second spring-loaded component 29 is not compressed, the rigid rod segment 291 extends beyond the end face of the lower cover 22, and the flexible rod segment 292 is suspended above the second PCB board 26. This structure of the second spring-loaded component 29, with the flexible rod segment 292, helps to reduce the pressure on the second PCB board 26 when compressed, thus protecting the second PCB board 26. The flexible rod segment 292 can be conductive; when it contacts the second PCB board 26, it can conduct the circuit, causing the second alarm 28 to activate and trigger an alarm.

[0085] like Figure 7In the tower crane anti-loosening warning nut 2, the locking mechanism 25 may include a fixing block 251, a lever 252, and a base 253. The fixing block 251 is fixed to the outer wall of the upper cover 21. The base 253 is fixed to the outer wall of the lower cover 22. One end of the lever 252 is rotatably connected to the base 253. By rotating the lever 252, the other end of the lever 252 can rest on the fixing block 251, thereby fixing the upper cover 21 and the lower cover 22 to each other. The other end of the lever 252 can also leave the fixing block 251 to release the mutual fixation of the upper cover 21 and the lower cover 22. Using the locking mechanism 25, the upper cover 21 and the lower cover 22 can be fixed before the warning nut 2 is installed onto the bolt for easy installation. When it is necessary to increase the friction between the warning nut 2 and the bolt, the lever 252 can be rotated to release the fixing restriction of the upper cover 21 and the lower cover 22.

[0086] Example 3

[0087] like Figure 10 A tower crane anti-loosening early warning fastening device includes an early warning bolt 1 of Embodiment 1 and an early warning nut 2 of Embodiment 2. The early warning nut 2 is adapted to be installed on the early warning bolt 1. Both the early warning bolt 1 and the early warning nut 2 can alarm for loosening abnormalities, thus improving the effectiveness of abnormal warning.

[0088] In summary, using the warning bolt 1 and / or warning nut 2 in Examples 1-3 for bolt loosening alarm demonstrates a high level of effectiveness in the alarm mechanism. In contrast, the general anti-loosening measure for the warning nut 2 involves using an anti-loosening screw to laterally compress the warning nut 2 onto the bolt. However, since this is a screw-reinforced method, similar to the loosening mechanism of bolts and nuts, the anti-loosening structure of this measure is still prone to loosening during vibration, rendering the anti-loosening measure ineffective.

[0089] The warning bolt 1 in Example 1 can trigger an alarm by sensing its own pressure, without the need for other devices connected to the bolt. This self-sensing pressure method directly matches the loosening mechanism, resulting in high alarm sensitivity and reliable results.

[0090] In Example 2, the warning nut 2 is designed to increase the axial pressure of the warning nut 2 and the bolt, thereby increasing the rotational friction between the warning nut 2 and the bolt. Under vibration, the warning nut 2 is less likely to loosen. After the warning nut 2 is installed after the fastening nut, the warning nut 2 can accurately sense the looseness of the fastening nut and can accurately trigger an alarm when the set value is reached.

[0091] The early warning fastening device in Example 3 combines the alarm functions of the early warning bolt 1 and the early warning nut 2. The early warning nut 2 can compensate for the decrease in monitoring accuracy that may be caused by long-term pressure on the early warning bolt 1, thereby further improving the effectiveness of the alarm.

[0092] The above are merely some embodiments of this application. The scope of protection of this application is not limited to the above embodiments. For those skilled in the art, any improvements and modifications made without departing from the inventive design of this application should also fall within the scope of protection of this application.

Claims

1. A tower crane anti-loosening early warning nut, characterized in that, The warning nut (2) can be adapted to be installed on the tower crane anti-loosening warning bolt (1); The warning nut (2) includes an upper cover (21), a lower cover (22), an elastic extension member (23), an extension membrane (24), a locking mechanism (25), a second PCB board (26), a second battery (27), a second alarm (28), and a second spring-loaded component (29). The upper cover (21) includes an upper inner ring (211) and an upper outer ring (212) that are connected, and the cross-section of the upper cover (21) is U-shaped; the lower cover (22) includes a lower inner ring (221) and a lower outer ring (222) that are connected, and the cross-section of the lower cover (22) is U-shaped; The upper inner ring (211) connects to the lower inner ring (221) to form a total inner ring; the upper outer ring (212) connects to the lower outer ring (222) to form a total outer ring; The inner wall of the upper inner ring (211) is engraved with an upper internal thread, and the inner wall of the lower inner ring (221) is engraved with a lower internal thread. The upper internal thread and the lower internal thread are smoothly connected. An annular cavity (223) is formed between the inner ring and the outer ring; the elastic extension member (23) is installed in the annular cavity (223); The height of the total inner ring is greater than the height of the total outer ring, and the upper outer ring (212) and the lower outer ring (222) are seamlessly connected using the stretch membrane (24); The locking mechanism (25) is installed on the outer wall of the upper outer ring (212) and the outer wall of the lower outer ring (222), and is configured such that the locking mechanism (25) can fix the upper cover (21) and the lower cover (22) or release them; The second PCB board (26) is installed in the lower cover (22); the second battery (27), the second alarm (28) and the second spring-loaded component (29) are all installed on the second PCB board (26); the second spring-loaded component (29) also penetrates the lower cover (22) and is located away from the end face of the upper cover (21).

2. The tower crane anti-loosening early warning nut according to claim 1, characterized in that, The upper cover (21) is made of transparent material; the second alarm (28) is a light alarm; both the upper cover (21) and the lower cover (22) are hollow structures; the opposite sides of the upper outer ring (212) and the lower outer ring (222) are open structures; the second alarm (28) is located at the bottom of the lower outer ring (222) and faces the upper outer ring (212).

3. The tower crane anti-loosening early warning nut according to claim 1 or 2, characterized in that, The warning nut (2) includes two stretching membranes (24), one of which is seamlessly connected to the inner wall of the upper outer ring (212) and the inner wall of the lower outer ring (222), and the other stretching membrane (24) is seamlessly connected to the outer wall of the upper outer ring (212) and the outer wall of the lower outer ring (222).

4. The tower crane anti-loosening early warning nut according to claim 1, characterized in that, The second spring-loaded assembly (29) includes a rigid rod segment (291), a flexible rod segment (292), and a second elastic element (293); the rigid rod segment (291) is connected to the flexible rod segment (292); one end of the second elastic element (293) is fixed to the side wall of the rigid rod segment (291), and the other end of the second elastic element (293) is fixed to the second PCB board (26); when the second spring-loaded assembly (29) is not compressed, the rigid rod segment (291) extends out of the end face of the lower cover (22), and the flexible rod segment (292) is suspended above the second PCB board (26).

5. The tower crane anti-loosening early warning nut according to claim 1, characterized in that, The locking mechanism (25) includes a fixing block (251), a lever (252), and a base (253); the fixing block (251) is fixed to the outer wall of the upper cover (21); the base (253) is fixed to the outer wall of the lower cover (22); one end of the lever (252) is rotatably connected to the base (253), and by rotating the lever (252), the other end of the lever (252) can rest on the fixing block (251) so that the upper cover (21) and the lower cover (22) are fixed to each other, and the other end of the lever (252) can also leave the fixing block (251) to release the mutual fixation of the upper cover (21) and the lower cover (22).

6. A tower crane anti-loosening early warning fastening device, characterized in that, It includes a tower crane anti-loosening warning bolt (1) and a warning nut (2) as described in any one of claims 1-5, wherein the warning nut (2) is adapted to be installed on the warning bolt (1).

7. The tower crane anti-loosening early warning fastening device according to claim 6, characterized in that, The warning bolt (1) includes a bolt body (11), a first spring contact assembly (12), a first PCB board (13), a first battery (14), a sealing cap (15), and a first alarm (16). The bolt body (11) includes an end (111) and a rod (112) connected to each other; the first PCB board (13) is fixed on the end face of the end (111) away from the rod (112); the first battery (14) and the first alarm (16) are both mounted on the first PCB board (13); the sealing cover (15) is fixed on the end (111), and the sealing cover (15) seamlessly covers the first PCB board (13), the first battery (14) and the first alarm (16). The end (111) has one or more through holes (1111) parallel to the rod body (112); each of the through holes (1111) is equipped with a first spring-loaded component (12); one end of the first spring-loaded component (12) is fixed to the first PCB board (13), and the other end protrudes from the end (111) when not under pressure.

8. The tower crane anti-loosening early warning bolt according to claim 7, characterized in that, The tower crane anti-loosening warning bolt (1) also includes a wireless transmission module (17); the wireless transmission module (17) is installed on the first PCB board (13) and is wrapped in the sealing cover (15).

9. The tower crane anti-loosening early warning bolt according to claim 7, characterized in that, The first spring-loaded component (12) includes an upper tube (121), a lower tube (122), and a first elastic element (123); the two ends of the first elastic element (123) are respectively fixed to the upper tube (121) and the lower tube (122); the lower tube (122) is connected to the first PCB board (13); the upper tube (121) exposes the end (111) when not under pressure. The first PCB board (13) is configured such that when the pressure of the first spring-loaded component (12) on the first PCB board (13) is greater than a set value, the circuit where the first alarm is located is kept in an open state; when the pressure of the first spring-loaded component (12) on the first PCB board (13) is less than a set value, the circuit where the first alarm is located is connected.

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