Monitoring device for preventing bolt from loosening

Abstract

The utility model provides a monitoring device for preventing bolt looseness, which relates to the field of bolt looseness monitoring equipment, and comprises a bolt, a nut and a monitoring unit, the monitoring unit comprises a monitoring assembly and an alarm assembly, the monitoring assembly and the alarm assembly are sleeved on the surface of the bolt, the nut is in threaded connection with the bolt, and the alarm assembly is in threaded connection with the bolt. The monitoring assembly is used for loosening monitoring, and the alarm assembly is used for giving an alarm. Through the cooperation of the first gasket, the second gasket and the piezoelectric sensor, the looseness condition of the bolt can be monitored in real time, potential safety hazards can be found in time, the monitoring assembly is easy and convenient to install, complex operation procedures are not needed, operation is convenient, the bolt can be matched with the bolt to fasten different fasteners, and the safety of the bolt is improved. And an operator or a maintainer can be reminded to take measures in time through the alarm assembly, equipment failures or safety accidents caused by bolt looseness are prevented, and therefore the safety and stability of the connecting piece can be ensured.

Description

Technical Field

[0001] This utility model belongs to the field of bolt loosening monitoring equipment, specifically a monitoring device for preventing bolt loosening. Background Technology

[0002] Bolt connections are a common type of connection in mechanical equipment. However, during equipment operation, bolts may loosen due to factors such as vibration and temperature changes, leading to unstable equipment connections and even safety accidents. Therefore, bolt loosening monitoring devices can detect bolt loosening in a timely manner, allowing for appropriate measures to be taken. However, traditional bolt loosening monitoring methods suffer from poor real-time performance, high costs, and complex operation, making them unsuitable for monitoring bolt loosening.

[0003] In summary, this utility model provides a monitoring device to prevent bolt loosening, thereby solving the above-mentioned problems. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A monitoring device for preventing bolt loosening includes a bolt, a nut, and a monitoring unit. The monitoring unit includes a monitoring component and an alarm component, both of which are fitted onto the surface of the bolt. The nut is threadedly connected to the bolt. The monitoring component is used for loosening detection, and the alarm component is used to issue an alarm. The monitoring component includes a first washer, a second washer, a groove, a piezoelectric sensor, and an epoxy resin coating. The first and second washers each have a groove on their opposite sides. The piezoelectric sensor is located in the inner cavity of the groove and engages with it. The other side of the first washer contacts the bolt. The epoxy resin coating is applied to the surface of the piezoelectric sensor.

[0006] Furthermore, in this utility model, the alarm component includes a housing, a control motherboard, a buzzer, a power module, and a loudspeaker hole. The control motherboard, buzzer, and power module are all installed inside the housing, and the loudspeaker hole is located on the surface of the housing.

[0007] Furthermore, in this utility model, the power module is fixed to the bottom of the inner cavity of the housing, and the control motherboard and the buzzer are both fixed to the back of the inner cavity of the housing.

[0008] Furthermore, in this invention, the output terminal of the piezoelectric sensor is connected to the input terminal of the control motherboard, and the output terminal of the control motherboard is connected to the input terminal of the buzzer.

[0009] Beneficial effects: This utility model has the following beneficial effects:

[0010] This invention, through the cooperation of a first gasket, a second gasket, and a piezoelectric sensor, can monitor the loosening of bolts in real time, thereby promptly detecting potential safety hazards. The monitoring components are easy to install and do not require complicated operating procedures, making them convenient to operate. They can be used with bolts to tighten different fasteners, and the alarm component can promptly remind operators or maintenance personnel to take measures to prevent equipment failures or safety accidents caused by loose bolts, thus ensuring the safety and stability of the connection. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the main structure of the monitoring component of this utility model;

[0013] Figure 3 This is a schematic diagram of the separated state structure of the monitoring component of this utility model;

[0014] Figure 4 This is a cross-sectional structural diagram of the outer shell of this utility model;

[0015] Figure 5 This is a schematic diagram of the system flow of this utility model.

[0016] In the picture:

[0017] 1. Bolt; 2. Nut; 3. Monitoring unit; 31. Monitoring component; 311. First gasket; 312. Second gasket; 313. Groove; 314. Piezoelectric sensor; 315. Epoxy resin coating; 32. Alarm component; 321. Housing; 322. Control main board; 323. Buzzer; 324. Power module; 325. Amplifier hole. Detailed Implementation

[0018] To better understand the technical content of this utility model, specific embodiments are described below in conjunction with the accompanying drawings. Various aspects of this utility model are described in this disclosure with reference to the accompanying drawings, which illustrate numerous illustrative embodiments. The embodiments of this disclosure are not necessarily defined to include all aspects of this utility model. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed in this utility model are not limited to any particular implementation. Furthermore, some aspects of this utility model can be used alone or in any suitable combination with other aspects disclosed in this utility model.

[0019] Example 1

[0020] like Figure 1-5As shown, this is the first embodiment of the present invention. This embodiment provides a monitoring device for preventing bolt loosening, including a bolt 1, a nut 2, and a monitoring unit 3. The monitoring unit 3 includes a monitoring component 31 and an alarm component 32. Both the monitoring component 31 and the alarm component 32 are sleeved on the surface of the bolt 1. The nut 2 is threadedly connected to the bolt 1. The monitoring component 31 is used for loosening detection, and the alarm component 32 is used for issuing an alarm. The monitoring component 31 includes a first washer 311, a second washer 312, a groove 313, a piezoelectric sensor 314, and an epoxy resin coating 315. The first washer 311 and the second washer 312 each have a groove 313 on their opposite sides. The piezoelectric sensor 314 is located in the inner cavity of the groove 313 and is engaged with the inner cavity of the groove 313. The other side of the first washer 311 is in contact with the bolt 1. The epoxy resin coating 315 is coated on the surface of the piezoelectric sensor 314.

[0021] like Figure 1-5 As shown, both the first gasket 311 and the second gasket 312 are made of polyurethane high-resilience material. The piezoelectric sensor 314 is placed in the groove 313 on the surface of the second gasket 312. The surface of the piezoelectric sensor 314 is coated with an epoxy resin coating 315, which forms a protective structure. After the first gasket 311 and the second gasket 312 are assembled, they are installed between the bolt 1 and the mounting surface. Due to the pressure at both ends of the bolt 1 and the mounting surface, corresponding to the condition that the bolt 1 is properly installed and not loose, the piezoelectric sensor 314 corresponds to a predetermined signal and quantifies the stress wave energy propagating between the two gaskets. The relationship between the degree of preload degradation of the bolt 1 and the stress wave response signal is established. The degree of looseness of the bolt 1 is evaluated by the change in the response signal. When the bolt 1 is tightened, the response signal corresponds to the good preload of the bolt 1. When the bolt 1 is loose, the response signal changes due to the pressure change of the high-elasticity washer. When the stress wave response reaches the corresponding loosening threshold, it indicates that the bolt 1 has loosened, and a warning is issued by the pre-alarm component 32.

[0022] Example 2

[0023] Reference Figure 1-5 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0024] In this embodiment, the alarm component 32 includes a housing 321, a control motherboard 322, a buzzer 323, a power module 324, and a loudspeaker 325. The control motherboard 322, the buzzer 323, and the power module 324 are all installed in the inner cavity of the housing 321, and the loudspeaker 325 is opened on the surface of the housing 321.

[0025] The power module 324 is fixed to the bottom of the inner cavity of the housing 321, and the control motherboard 322 and the buzzer 323 are both fixed to the back of the inner cavity of the housing 321.

[0026] The power module 324 is fixed to the bottom of the inner cavity of the housing 321, and the control motherboard 322 and the buzzer 323 are both fixed to the back of the inner cavity of the housing 321.

[0027] like Figure 1-5 As shown, the power module 324 provides power to the alarm component 32 so that it can operate stably. After receiving the abnormal signal from the piezoelectric sensor 314, the control motherboard 322 sends a signal to the buzzer 323, which then emits a sharp alarm message to remind staff to take timely measures.

[0028] In use, the first washer 311 and the second washer 312 are assembled and installed between the bolt 1 and the mounting surface. Due to the pressure at both ends of the bolt 1 and the mounting surface, corresponding to the condition that the bolt 1 is properly installed and not loose, the piezoelectric sensor 314 corresponds to a predetermined signal and quantifies the stress wave energy propagating between the two washer. The relationship between the degree of preload degradation of the bolt 1 and the stress wave response signal is established. The degree of looseness of the bolt 1 is evaluated by the change in the response signal. When the bolt 1 is tightened, the response signal corresponds to the good preload of the bolt 1. When the bolt 1 is loose, the response signal changes due to the pressure change of the high elastic washer. When the stress wave response reaches the corresponding loosening threshold, it indicates that the bolt 1 has loosened, and a warning reminder is issued through the pre-alarm component 32.

[0029] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0030] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of this invention shall be determined by the claims.

Claims

1. A monitoring device against loosening of a bolt, comprising a bolt (1), a nut (2) and a monitoring unit (3), characterized in that: The monitoring unit (3) comprises a monitoring assembly (31) and an alarm assembly (32), the monitoring assembly (31) and the alarm assembly (32) are sleeved on the surface of the bolt (1), the nut (2) is threadedly connected with the bolt (1), the monitoring assembly (31) is used for loosening monitoring, the alarm assembly (32) is used for issuing an alarm, the monitoring assembly (31) comprises a first gasket (311), a second gasket (312), a groove (313), a piezoelectric sensor (314) and an epoxy coating (315), the opposite side of the first gasket (311) and the second gasket (312) is provided with the groove (313), the piezoelectric sensor (314) is located in the inner cavity of the groove (313) and is connected with the inner cavity of the groove (313), the other side of the first gasket (311) is in contact with the bolt (1), and the epoxy coating (315) is coated on the surface of the piezoelectric sensor (314).

2. The bolt loosening monitoring device of claim 1, wherein: The alarm assembly (32) comprises a shell (321), a control mainboard (322), a buzzer (323), a power module (324) and a sound amplification hole (325), the control mainboard (322), the buzzer (323) and the power module (324) are installed in the inner cavity of the shell (321), and the sound amplification hole (325) is formed in the surface of the shell (321).

3. The bolt loosening monitoring device of claim 2, wherein: The power module (324) is fixed to the bottom of the inner cavity of the shell (321), and the control mainboard (322) and the buzzer (323) are fixed to the back of the inner cavity of the shell (321).

4. The device for monitoring the loosening of the bolt according to claim 2, wherein: The output end of the piezoelectric sensor (314) is connected with the input end of the control mainboard (322), and the output end of the control mainboard (322) is connected with the input end of the buzzer (323).

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