Bolt mechanical anti-loose and fracture detection device

Abstract

The invention provides a bolt mechanical anti-loosening and fracture detection device which comprises a bolt cap, a bolt fracture detection assembly and a jackscrew, the bolt cap comprises a sleeve and a supporting leg which are connected, the supporting leg comprises a supporting leg body and a supporting foot which are connected, and the supporting foot is inserted into a corresponding groove of a connected base body; the bolt fracture detection assembly comprises a battery, a buzzer, a spring, a spring stop pin, a copper ring contact and a wire, and the spring, the copper ring contact and the wire are arranged in the supporting leg containing cavity to form a microswitch. When the bolt cap is installed normally, the copper ring is not in contact with the bolt cap, and the microswitch is switched off; when the bolt is broken, the bolt cap and the nail head of the bolt are jacked up by the spring and the copper ring contact, the copper ring is in contact with the bolt cap, the microswitch is closed, the loop of the buzzer and the battery is closed, and the buzzer works. According to the technical scheme, the technical problems that in the prior art, a bolt fracture detection technology is complex in operation and is not suitable for bolts hidden in a structure and in a working place are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bolt anti-loosening and fracture detection, and particularly relates to a bolt mechanical anti-loosening and fracture detection device. BACKGROUND

[0002] Bolt connection is a commonly used mechanical connection method, and is usually composed of a bolt, a nut and a washer, wherein the bolt is a main component for connection and is also a main force bearing component. The bolt connection has advantages of simple structure, high reliability and convenient disassembly, etc. However, the bolt is easily subjected to external loads such as vibration, impact, material high-temperature creep, etc. and environmental loads such as rusting and hydrogen absorption in actual work, and is easily caused to relatively rotate in a loosening direction to cause bolt loosening, thereby greatly shortening the fatigue life of the bolt connection or even causing serious safety hazards or directly causing a major accident due to fracture.

[0003] Bolt anti-loosening technology is an important content of mechanical engineering, and mainly prevents the bolt from loosening due to vibration, load change or other external factors during use. Bolt loosening can cause equipment failure, structure damage or even safety accidents, so the anti-loosening technology has wide application in the fields of machinery, aerospace, automobile, building, etc. Common bolt anti-loosening methods include mechanical anti-loosening and adhesive anti-loosening. The mechanical anti-loosening method such as partial bolt, spring washer double nut, stop washer and lock wire anti-loosening, etc. increases resistance through the interaction of mechanical structures to prevent loosening. The adhesive anti-loosening fills the space between threads with adhesive materials (such as silicone) to increase friction. In special environments, self-locking bolts or locking glue can be used to improve the anti-loosening performance. The selection of the anti-loosening scheme needs to consider the environment, cost and maintenance requirements to ensure the reliability of the bolt during use.

[0004] Bolt fracture detection technology usually refers to detecting the bolt in use to avoid accidents caused by bolt failure. The simplest method is to check by marking, which is relatively simple and direct, but is not suitable for bolts hidden in the structure inside and difficult working sites. In addition, there are anti-loosening lock wire detection based on ai vision recognition, pre-tightening force detection based on time reversal, pre-tightening force detection method based on piezoelectric sensing technology, etc. This kind of way is complex in operation and high in cost. SUMMARY

[0005] The present application provides a bolt mechanical anti-loosening and fracture detection device, which can solve the technical problem of complex operation of the bolt fracture detection technology in the prior art, and is not suitable for bolts hidden in the structure inside and difficult working sites.

[0006] According to an aspect of the present application, a bolt mechanical anti-loosening and fracture detection device is provided, which comprises a bolt cap, a bolt fracture detection assembly and a jack. The bolt cap is used to realize mechanical anti-loosening of the bolt. The bolt cap comprises a sleeve and a leg connected with each other. The leg is arranged at the periphery of the sleeve. The leg comprises a leg body and a leg foot connected with each other. The leg foot is arranged protrudingly relative to the sleeve. The leg body has a leg accommodating cavity. The top of the sleeve has a sleeve accommodating cavity. The leg accommodating cavity and the sleeve accommodating cavity are connected in communication. The leg foot is inserted into the corresponding groove of the connected base body to prevent relative rotation between the bolt cap and the connected base body, thereby realizing locking of the bolt cap and the connected base body. The sleeve is sleeved on the bolt. The jack is installed on the sleeve and is used to connect the bolt cap and the bolt. The bolt fracture detection assembly comprises a battery, a buzzer, a spring, a spring stop pin, a copper ring contact and a wire. The battery is connected with the buzzer. The battery and the buzzer are arranged in the sleeve accommodating cavity. The spring, the copper ring contact and the wire are arranged in the leg accommodating cavity to form a micro switch. The bolt cap is connected with the negative electrode of the battery. The copper ring contact is composed of a fixedly connected insulating contact and a copper ring. The copper ring is connected with the negative electrode of the buzzer through the wire. One end of the spring is pressed by the spring stop pin. The other end of the spring is connected with the copper ring contact to provide elastic force for the copper ring contact. When the bolt cap is normally installed and the bolt is normally working, the copper ring is not in contact with the bolt cap. The micro switch is turned off. The circuit of the buzzer and the battery is disconnected. The buzzer does not work. When the bolt is fractured, the head of the bolt is lifted by the spring and the copper ring contact. The copper ring is in contact with the bolt cap. The micro switch is turned on. The circuit of the buzzer and the battery is closed. The buzzer works.

[0007] Further, the insulating contact is a mushroom-shaped non-metallic support rod. The leg foot further has a leg foot accommodating cavity. The leg accommodating cavity and the leg foot accommodating cavity are connected in communication. The copper ring is connected with the negative electrode of the buzzer through the wire. The mushroom-shaped non-metallic support rod is matched with the leg foot accommodating cavity by penetrating the copper ring. The diameter of the copper ring is smaller than the inner diameter of the leg accommodating cavity. When the bolt cap is normally installed and the bolt is normally working, the copper ring contact is pressed and compressed back. The spring stores elastic potential energy. The copper ring is disconnected with the bolt cap. When the bolt is fractured, the head of the bolt is disconnected with the bolt column. The head of the bolt is lifted by the spring. The spring pushes the copper ring contact. The copper ring is in contact with the bolt cap. The circuit of the buzzer is conducted. The buzzer realizes alarm.

[0008] Further, the bolt mechanical anti-loosening and fracture detection device further comprises a top cover. The top cover is welded on the top of the bolt cap to protect the bolt cap.

[0009] Further, the bolt mechanical anti-loosening and fracture detection device comprises a plurality of jacks. The plurality of jacks are arranged at the periphery of the bolt cap at intervals to realize fixed connection of the bolt cap and the head of the bolt.

[0010] Further, the bolt cap comprises a plurality of legs which are arranged along the circumference of the sleeve and are inserted into corresponding grooves of the connected base body one by one, thereby preventing relative rotation between the bolt cap and the connected base body.

[0011] Further, the insulating contact and the copper ring are fixedly connected by adhesion or interference fit.

[0012] The technical scheme of the application provides a bolt mechanical anti-loosening and fracture detection device, effectively solves the fracture detection problem of uncheckable and unmeasurable bolts, simultaneously considers the mechanical anti-loosening function of the bolt, avoids using other anti-loosening modes which occupy structural space, makes the whole structure more compact, and is particularly suitable for bolt connection structures with limited structural space. The technical scheme does not need other detection equipment, and only needs to check whether there is sound when checking, has particularly high use friendliness. Meanwhile, if other modes are used for power supply, the same life as the product can be achieved in theory. BRIEF DESCRIPTION OF DRAWINGS

[0013] The included drawings provide further understanding of the embodiments of the application, form part of the specification, illustrate the embodiments of the application, and together with the text description, explain the principles of the application. Obviously, the drawings in the following description only show some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0014] Figure 1 An exploded view of the bolt mechanical anti-loosening and fracture detection device provided by the specific embodiment of the application is shown;

[0015] Figure 2 A sectional view of the bolt mechanical anti-loosening and fracture detection device provided by the specific embodiment of the application is shown;

[0016] Figure 3 A top view of the bolt mechanical anti-loosening and fracture detection device provided by the specific embodiment of the application is shown;

[0017] Figure 4 A circuit schematic diagram of the bolt mechanical anti-loosening and fracture detection device provided by the specific embodiment of the application is shown;

[0018] Figure 5a A working state diagram (normal working state) of the bolt mechanical anti-loosening and fracture detection device provided by the specific embodiment of the application is shown;

[0019] Figure 5b A working state diagram (triggering alarm working state) of the bolt mechanical anti-loosening and fracture detection device provided by the specific embodiment of the application is shown.

[0020] wherein the above figures include the following reference signs:

[0021] 1, top cover; 2, battery; 3, buzzer; 4, wire; 5, spring; 6, copper ring contact; 61, insulating contact; 62, copper ring; 7, bolt cap; 71, sleeve; 71a, sleeve accommodating cavity; 72, leg; 721, leg body; 721a, leg accommodating cavity; 722, leg foot; 722a, leg foot accommodating cavity; 8, spring stop pin; 9, jackscrew; 10, bolt; 11, connected base body. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one example embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the example embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a reference to the presence of a feature, step, operation, device, component, and / or combinations thereof.

[0024] Unless specifically stated otherwise, the relative arrangements of the components and steps illustrated in these embodiments and the numerical expressions and values are not limiting of the scope of the application. It should be understood that the various parts of the drawings are not necessarily drawn to scale relative to each other. The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered as part of the description of the application. In all examples shown and discussed herein, any specific value should be interpreted as merely an example, and not as a limitation. Therefore, other examples of the example embodiments can have different values. It should be noted that similar reference signs and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0025] As Figures 1 to 5bAs shown, the bolt mechanical anti-loosening and fracture detection device according to the specific embodiment of the application comprises a bolt cap 7, a bolt fracture detection assembly and a top screw 9, the bolt cap 7 is used to realize mechanical anti-loosening of the bolt 10, the bolt cap 7 comprises a sleeve 71 and a leg 72 connected with each other, the leg 72 is arranged at the periphery of the sleeve 71, the leg 72 comprises a leg body 721 and a leg foot 722 connected with each other, the leg foot 722 is arranged protrudingly relative to the sleeve 71, the leg body 721 has a leg accommodating cavity 721a, the top of the sleeve 71 has a sleeve accommodating cavity 71a, the leg accommodating cavity 721a and the sleeve accommodating cavity 71a are communicated with each other, the leg foot 722 is inserted into the corresponding groove of the connected base body 11, the relative rotation between the bolt cap 7 and the connected base body 11 is prevented, the locking of the bolt cap 7 and the connected base body 11 is realized; the sleeve 71 is sleeved on the bolt 10, the top screw 9 is installed on the sleeve 71 and is used to connect the bolt cap 7 and the bolt 10; the bolt fracture detection assembly comprises a battery 2, a buzzer 3, a spring 5, a spring stop pin 8, a copper ring contact 6 and a wire 4, the battery 2 is connected with the buzzer 3, the battery 2 and the buzzer 3 are arranged in the sleeve accommodating cavity 71a, the spring 5, the copper ring contact 6 and the wire 4 are arranged in the leg accommodating cavity 721a and constitute a micro switch; the bolt cap 7 is connected with the negative electrode of the battery 2, the copper ring contact 6 is composed of a fixedly connected insulating contact 61 and a copper ring 62, the copper ring 62 is connected with the negative electrode of the buzzer 3 through the wire 4; one end of the spring 5 is pressed by the spring stop pin 8 and the other end is connected with the copper ring contact 6 and provides elastic force for the copper ring contact 6; when the bolt cap 7 is normally installed and the bolt 10 normally works, the copper ring 62 does not contact with the bolt cap 7, the micro switch is opened, the loop of the buzzer 3 and the battery 2 is opened, and the buzzer 3 does not work; when the bolt 10 is fractured, the head of the bolt 10 is lifted by the spring 5 and the copper ring contact 6, the copper ring 62 contacts with the bolt cap 7, the micro switch is closed, the loop of the buzzer 3 and the battery 2 is closed, and the buzzer 3 works.

[0026] The bolt mechanical anti-loosening and fracture detection device is connected with the base through the bolt pin mode to realize mechanical anti-loosening, improve the reliability of the bolt connection, embed the bolt fracture detection device into the mechanical structure, realize the sound reminding function of the bolt failure and fracture, use the sound as the reminding way, and can be applied to some special working conditions. The bolt mechanical anti-loosening assembly comprises a bolt cap, a top cover and a top screw. The bolt cap is a sleeve, the top of the sleeve has a reserved space for placing the bolt fracture detection assembly, the bottom of the sleeve extends a supporting leg according to the connected part to serve as a locking pin and is inserted into the corresponding groove of the connected base to prevent relative rotation, and the bolt cap is locked with the connected base. The top screw is installed on the bolt cap and is used for connecting the bolt cap and the bolt head. The bolt fracture detection assembly is embedded into the bolt cap and comprises a micro battery, a buzzer, a spring, a spring block pin, a copper ring contact and a wire. The buzzer is the main execution component of the detection assembly, the micro battery is used for power supply, the spring, the copper ring contact and the wire are embedded into the supporting leg of the bolt cap to form a micro switch. When the bolt cap is normally installed, the switch is opened, the circuit of the active buzzer and the battery is disconnected, and the buzzer does not work. When the bolt is fractured, the bolt cap is lifted by the micro switch composed of the spring and the copper ring contact, the switch is closed, the circuit of the active buzzer and the battery is closed, and the buzzer works. The bolt mechanical anti-loosening and fracture detection device provided by the application can be installed on the important bolt as an accessory of the key bolt, realizes the bolt mechanical anti-loosening and fracture detection in the narrow space under the premise of ensuring safety and reliability, uses the buzzer sound as the reminding way, and takes into account the extreme working conditions of the unobservable and uncheckable bolt. The bolt head is fixed through the top screw, the base is connected through the bolt pin mode to realize mechanical anti-loosening, improve the reliability of the bolt connection, embed the bolt fracture detection device into the mechanical structure, realize the sound reminding function of the bolt failure and fracture, and use the buzzer sound as the reminding way. Therefore, compared with the prior art, the bolt mechanical anti-loosening and fracture detection device provided by the application effectively solves the fracture detection problem of the uncheckable and unobservable bolt, takes into account the mechanical anti-loosening function of the bolt, avoids the use of other anti-loosening modes occupying the structural space, makes the whole structure more compact, and is particularly suitable for the bolt connection structure with limited structural space. The technical scheme does not need other detection equipment, and only needs to check whether there is sound when checking, has particularly high use friendliness. Meanwhile, if other power supply modes are used, the product can theoretically have the same service life.

[0027] Furthermore, in this invention, to achieve an alarm in case of bolt breakage, the insulating contact 61 can be configured as a mushroom-shaped non-metallic support rod. The support leg 722 also has a support leg receiving cavity 722a. The support leg receiving cavity 721a is connected to the support leg receiving cavity 722a. The copper ring 62 is connected to the negative terminal of the buzzer 3 through the wire 4. The mushroom-shaped non-metallic support rod passes through the copper ring 62 and engages with the support leg receiving cavity 722a. The diameter of the copper ring 62 is smaller than the inner diameter of the support leg receiving cavity 721a. When the bolt cap 7 is properly installed and the bolt 10 is working normally, the copper ring contact 6 is compressed back, the spring 5 stores elastic potential energy, and the copper ring 62 is disconnected from the bolt cap 7. When the bolt 10 breaks, the head of the bolt 10 is disconnected from the stud, the head and the bolt cap 7 are lifted by the spring 5, the spring 5 pushes the copper ring contact 6, the copper ring 62 contacts the bolt cap 7, the buzzer 3 circuit is connected, and the buzzer 3 realizes the alarm.

[0028] Furthermore, in this invention, in order to protect the bolt, the bolt mechanical anti-loosening and fracture detection device also includes a top cover 1, which is welded to the top of the bolt cap 7 for protecting the bolt cap 7.

[0029] In addition, in order to improve the reliability of the connection between the bolt cap and the bolt, the bolt mechanical anti-loosening and fracture detection device can be configured to include multiple set screws 9, which are spaced apart around the periphery of the bolt cap 7, so as to achieve a fixed connection between the bolt cap 7 and the head of the bolt 10.

[0030] Furthermore, in order to improve the connection reliability between the bolt cap and the connected substrate, the bolt cap 7 includes a plurality of legs 722, which are spaced apart along the periphery of the sleeve 71. The plurality of legs 722 are inserted one-to-one into the corresponding grooves of the connected substrate 11 to prevent relative rotation between the bolt cap 7 and the connected substrate 11.

[0031] Furthermore, in this invention, the insulating contact 61 and the copper ring 62 are fixedly connected by bonding or interference fit.

[0032] To gain a further understanding of the present invention, the following description is provided in conjunction with... Figures 1 to 5b The bolt mechanical anti-loosening and fracture detection device provided by the present invention will be described in detail.

[0033] like Figures 1 to 5b As shown in the figure, a specific embodiment of the present invention provides a bolt mechanical anti-loosening and fracture detection device. The device includes a bolt cap, a top cover, and set screws. The bolt cap is a sleeve with a reserved space at the top for placing a bolt fracture detection component. The top cover is welded to the top for protection. One or more legs extend from the bottom of the bolt cap, acting as locking pins, which are inserted into corresponding grooves in the connected substrate to prevent relative rotation, thus locking the bolt cap to the connected substrate. Set screws are installed on the bolt cap; one or more can be provided for connecting the bolt cap and the bolt head.

[0034] The bolt fracture detection assembly is embedded in the bolt cap, including a micro battery, a micro active buzzer, a spring, a spring stop pin, a copper ring contact, and a wire. The micro active buzzer is the main execution component of the detection assembly, and the micro battery is used for power supply. The spring, the copper ring contact, and the wire are embedded in the leg of the bolt cap to form a micro switch. When the bolt cap is normally installed, the switch is open, the active buzzer is disconnected from the circuit of the battery, and the buzzer does not work. When the bolt is broken, the bolt cap is lifted by the micro switch composed of the spring and the copper ring contact, the switch is closed, the active buzzer is connected to the circuit of the battery, and the buzzer works.

[0035] Further, the micro battery provides power for the buzzer system, and other power supply modes such as nearby power supply, unified power supply, electromagnetic induction power supply, or other modes can also be used.

[0036] Further, the bolt cap serves as the main component of mechanical anti-loosening and can also serve as the wire function of the fracture detection assembly, connected to the negative electrode of the battery. The copper ring contact is connected to the negative electrode of the buzzer. The micro switch composed of the spring and the copper ring contact controls the opening and closing of the switch to realize the switching of the circuit state.

[0037] Further, the top of the bolt cap is reserved for the installation of the micro battery and the micro active buzzer. The locking leg of the bolt cap is a hollow structure for the installation of the spring, the spring stop pin, and the copper ring contact to realize the function of the micro switch.

[0038] Further, the copper ring contact is composed of a mushroom-shaped non-metallic support rod and a copper ring. The copper ring is connected to the negative electrode of the buzzer through the wire. The mushroom-shaped non-metallic support rod extends out of the locking leg of the bolt cap through the copper ring while ensuring the insulation of the copper ring from the bolt cap. After the device is installed, the copper ring contact is compressed back, the spring stores elastic potential energy, and the copper ring is disconnected from the bolt cap. When the bolt cap and the screw head are pushed away after the bolt is broken, the spring pushes the copper ring contact, the copper ring contacts the bolt cap, the buzzer circuit is connected, and the buzzer realizes alarm.

[0039] The above technical solution realizes the switching of the circuit state through the phenomenon that the bolt head is pushed away after the bolt is broken, thereby realizing the alarm.

[0040] As Figures 1 to 5bAs shown, in one embodiment of the present application, a bolt mechanical anti-loosening and fracture detection device is provided. The bolt mechanical anti-loosening and fracture detection device comprises a top cover 1, a battery 2, a buzzer 3, a wire 4, a spring 5, a copper ring contact 6, a bolt cap 7, a spring stop pin 8, a jack 9, a bolt 10, and a connected base 11. The copper ring contact is composed of an insulating contact 61 and a copper ring 62, and the two components are connected by bonding or interference fit, wherein the copper ring 62 connects the wire 4 and leads to the negative electrode of the buzzer 3. One end of the spring 5 is pressed by the spring stop pin 8, and the other end is connected with the copper ring contact 6 to provide a spring force, and they are jointly installed in the corresponding structure of the bolt cap 7. The jack 9 is installed on the bolt cap 7 and used to connect the bolt cap 7 and the bolt 10. After the bolt cap 7 is installed, it is inserted into the corresponding groove of the connected base 11 to prevent the rotation of the entire device.

[0041] The design principle of the present application is that when the assembly is in a normal state, the bolt cap 7 is connected with the bolt through the jack 9, the bolt cap 7 is connected with the connected base 11 by being inserted into the corresponding groove of the connected base 11, the mechanical anti-loosening of the bolt is achieved, the spring 5 is in a compressed high potential state, the copper ring 62 does not contact the bolt cap 7 at this time, the fracture detection circuit is open, the battery 2 circuit is open, and the battery 2 is not discharged. When the bolt 10 is fractured (such as hydrogen embrittlement fracture), the head of the bolt 10 is disconnected from the shank, the head is lifted by the spring 5, the copper ring 62 contacts the bolt cap 7 at this time, the fracture detection circuit is closed, the battery 2 circuit is closed, the battery 2 is discharged, the buzzer 3 buzzes, and the fracture alarm function is achieved. In the case where space is allowed, the battery 2 can be powered by nearby power supply, unified power supply, electromagnetic induction power supply or other ways to prolong the service life.

[0042] In summary, the application discloses a bolt mechanical anti-loosening and fracture detection device, which realizes mechanical anti-loosening by connecting a base through a bolt pin mode, improves the reliability of bolt connection, embeds a bolt fracture detection device into the mechanical structure, realizes the sound reminding function of bolt failure and fracture, uses sound as a reminding approach, and can be applied to some special working conditions. The bolt mechanical anti-loosening assembly comprises a bolt cap, a top cover and a top screw, the bolt cap is a sleeve, the top of the sleeve has a reserved space for placing the bolt fracture detection assembly, and the top cover is welded on the top for protection; one or more supporting legs are extended from the bottom of the bolt cap according to the connected part to act as locking pins and are inserted into corresponding grooves in the connected base to prevent relative rotation, and the bolt cap is locked with the connected base. The top screw is installed on the bolt cap and can be one or more, which are used for connecting the bolt cap and the bolt head. The bolt fracture detection assembly is embedded in the bolt cap and comprises a micro battery, a micro active buzzer, a spring, a spring locking pin, a copper ring contact and a wire. The micro active buzzer is the main execution component of the detection assembly, the micro battery is used for power supply, the spring, the copper ring contact and the wire are embedded in the supporting legs of the bolt cap to form a micro switch. When the bolt cap is normally installed, the switch is open, the loop of the active buzzer and the battery is disconnected, and the buzzer does not work; when the bolt is broken, the bolt cap is lifted by the micro switch composed of the spring and the copper ring contact, the switch is closed, the loop of the active buzzer and the battery is closed, and the buzzer works.

[0043] The technical scheme of the application innovatively uses sound as the alarm mode of the detection device, does not need expensive and bulky detection instruments, and effectively solves the detection problem of the uncheckable and unmeasurable bolt. The power taking mode designed in the technical scheme can effectively prolong the service life, and if a micro battery is used for power supply, the service life is equivalent to the storage life of the battery.

[0044] The technical scheme of the application effectively solves the fracture detection problem of the uncheckable and unmeasurable bolt, simultaneously considers the mechanical anti-loosening function of the bolt, avoids using other anti-loosening modes occupying structural space, makes the whole structure more compact, and is particularly suitable for bolt connection structures with limited structural space. The technical scheme does not need other detection equipment, only needs to check whether there is sound when checking, has particularly high use friendliness, and can achieve the same life as the product if other power supply modes are used.

[0045] For purposes of the description hereinafter, spatial or directional terms, for example, "above", "below", "upper", "lower", and the like, can be used, and relate to the device as illustrated in the figures. However, it is to be understood that no absolute or relative orientation of the device is intended or implied, unless specifically described as such. Terms concerning attachments, coupling and the like, such as "connected" and "coupled" and the like, are to be construed in accordance with their normal meanings, that is, as referring to an indirect or direct connection or coupling. Any reference to "comprising" or "containing" is to be construed as meaning "comprising or containing, but not limited to". Any reference to "comprising" or "containing" is to be construed as meaning "comprising or containing, but not limited to".

[0046] In addition, it should be pointed out that the use of the terms "first", "second" and the like, to describe various elements, is merely intended to differentiate the elements from one another, and does not connote any special order or order of precedence, unless otherwise specifically indicated. Thus, the use of the terms "first", "second" and the like, is not intended to limit the scope of the present application, and is not intended to connote any special order or order of precedence.

[0047] The preferred embodiments herein disclosed are not intended to limit or restrict the scope of the application, but merely convey the best mode contemplated by the inventors of carrying out the claimed application. Any modifications, variations or changes within the spirit and scope of the application as disclosed herein will be considered to fall within the scope of the application.

Claims

1. A device for detecting mechanical loosening and breakage of bolts, characterized in that, The bolt mechanical anti-loosening and fracture detection device includes a bolt cap (7), a bolt fracture detection component, and a set screw (9). The bolt cap (7) is used to achieve mechanical anti-loosening of the bolt (10). The bolt cap (7) includes a sleeve (71) and a support leg (72) connected to each other. The support leg (72) is disposed around the sleeve (71). The support leg (72) includes a support leg body (721) and a support foot (722) connected to each other. The support foot (722) protrudes relative to the sleeve (71). The support leg body (721) has a support leg receiving cavity (721a). The top of the sleeve (71) has a sleeve receiving cavity (71a), and the support leg receiving cavity (721a) is connected to the sleeve receiving cavity (71a). The support leg (722) is inserted into the corresponding groove of the connected base (11) to prevent relative rotation between the bolt cap (7) and the connected base (11) and to achieve locking between the bolt cap (7) and the connected base (11). The sleeve (71) is sleeved on the bolt (10), and the set screw (9) is installed on the sleeve (71) for connecting the bolt cap (7) and the bolt (10). The bolt breakage detection assembly includes a battery (2), a buzzer (3), a spring (5), a spring stop pin (8), a copper ring contact (6), and a wire (4). The battery (2) is connected to the buzzer (3). The battery (2) and the buzzer (3) are located in the sleeve receiving cavity (71a). The spring (5), the copper ring contact (6), and the wire (4) are located in the leg receiving cavity (721a), forming a micro switch. The bolt cap (7) is connected to the negative terminal of the battery (2). The copper ring contact (6) consists of a fixedly connected insulating contact (61) and a copper ring (62). The copper ring (62) is connected to the negative terminal of the buzzer (3) through the wire (4). One end of the spring (5) is held in place by the spring stop pin (8), and the other end is connected to the copper ring contact (6) to provide elasticity. When the bolt cap (7) is properly installed and the bolt (10) is working normally, the copper ring (62) does not contact the bolt cap (7), the micro switch is off, the circuit between the buzzer (3) and the battery (2) is disconnected, and the buzzer (3) does not work; when the bolt (10) breaks, the bolt cap (7) and the head of the bolt (10) are lifted by the spring (5) and the copper ring contact (6), the copper ring (62) contacts the bolt cap (7), the micro switch is closed, the circuit between the buzzer (3) and the battery (2) is closed, and the buzzer (3) works.

2. The bolt mechanical loosening and fracture detection device according to claim 1, characterized in that, The insulating contact (61) is a mushroom-shaped non-metallic support rod. The support leg (722) also has a support leg receiving cavity (722a). The support leg receiving cavity (721a) is connected to the support leg receiving cavity (722a). The copper ring (62) is connected to the negative terminal of the buzzer (3) through the wire (4). The mushroom-shaped non-metallic support rod passes through the copper ring (62) and engages with the support leg receiving cavity (722a). The diameter of the copper ring (62) is smaller than the inner diameter of the support leg receiving cavity (721a). When the bolt cap (7) is in the correct position... When the bolt (10) is normally installed and working, the copper ring contact (6) is squeezed back, the spring (5) stores elastic potential energy, and the copper ring (62) is disconnected from the bolt cap (7). When the bolt (10) breaks, the head of the bolt (10) is disconnected from the stud, and the head and the bolt cap (7) are lifted by the spring (5). The spring (5) pushes the copper ring contact (6), and the copper ring (62) contacts the bolt cap (7). The buzzer (3) circuit is connected, and the buzzer (3) realizes the alarm.

3. The bolt mechanical loosening and fracture detection device according to claim 1, characterized in that, The bolt mechanical anti-loosening and fracture detection device also includes a top cover (1), which is welded to the top of the bolt cap (7) to protect the bolt cap (7).

4. The bolt mechanical anti-loosening and fracture detection device according to claim 3, characterized in that, The bolt mechanical anti-loosening and fracture detection device includes multiple set screws (9), which are spaced apart around the periphery of the bolt cap (7) to achieve a fixed connection between the bolt cap (7) and the head of the bolt (10).

5. The bolt mechanical loosening and fracture detection device according to claim 4, characterized in that, The bolt cap (7) includes multiple legs (722), which are spaced apart along the periphery of the sleeve (71). The multiple legs (722) are inserted into the corresponding grooves of the connected base (11) to prevent relative rotation between the bolt cap (7) and the connected base (11).

6. The bolt mechanical loosening and fracture detection device according to claim 1, characterized in that, The insulating contact (61) and the copper ring (62) are fixedly connected by bonding or interference fit.

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