Bolt loosening alarm device

Abstract

The utility model discloses a bolt loosening alarm device which comprises a nut body, a solar cell panel is arranged on the top face of the nut body, a cavity is formed in the nut body, a current-conducting plate is arranged on the top face of the cavity, and a sealing cover is arranged on the top of the current-conducting plate. A storage battery, a firing pin, a buzzer, a light-emitting alarm element and a fixing pipe are arranged in the cavity, the solar cell panel is electrically connected with the storage battery, the storage battery is electrically connected with the metal end of the top of the firing pin through a wire, and the buzzer and the light-emitting alarm element are connected between the storage battery and the conductive plate in parallel through wires. A metal end at the top of the firing pin is limited below the conductive plate through a spring; and the bottom of the firing pin extends out of the bottom surface of the nut body. According to the bolt looseness alarm device, a nut structure is adopted, the bolt looseness alarm device can be conveniently mounted and dismounted on the bolt, the alarm circuit can be conducted by colliding with the firing pin when the bolt screw or the fastening nut is loosened, bolt looseness monitoring is more comprehensive, and the bolt looseness alarm device has the advantages of being environmentally friendly, free of pollution, efficient in light source, long in service life and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of alarm devices, and in particular relates to a bolt loosening alarm device. Background Art

[0002] Bolts are widely used mechanical parts, used to fasten and connect two workpieces with through holes. When the connected workpieces are used for a long time or subjected to external forces, the bolts are prone to loosening. For bolts used on some industrial heavy machinery such as tower cranes and elevators, if they become loose, it will endanger personal safety and cause serious accidents. Therefore, it is necessary to regularly check the bolt connection, find loose bolts in time and take tightening measures, but bolt inspection is a long and tedious task, which is prone to omissions and difficult to eliminate the problem of incomplete inspection. In actual scenarios, bolt loosening includes two situations, one is the loosening and outward movement of the screw, and the other is the loosening and outward movement of the nut; and the existing devices for monitoring bolt loosening mostly determine the loosening of the bolt by monitoring the loosening of one of the screw and the nut, which results in the inability to fully and accurately monitor the loosening of the bolt, and there are certain limitations. Utility Model Content

[0003] The utility model aims to provide a bolt loosening alarm device, aiming to solve the problems existing in the prior art in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A bolt loosening alarm device comprises a nut body, wherein the nut body is provided with a threaded hole matched with the bolt thread, the top surface of the nut body is provided with a solar panel, the interior of the nut body is provided with a cavity, the top surface of the cavity is a conductive plate, and the top of the conductive plate is provided with a sealing cover; a battery, a striker, a buzzer, a luminous alarm element and a fixing tube are provided in the cavity, the solar panel is electrically connected to the battery, the battery is electrically connected to the metal end at the top of the striker through a wire, the buzzer and the luminous alarm element are connected in parallel between the battery and the conductive plate through a wire, a sound-through hole and a light-transmitting hole are provided on the nut body, the striker is movably clamped in the fixing tube, and the metal end at the top of the striker is set below the conductive plate by a spring limiter, and the bottom of the striker extends out of the bottom surface of the nut body.

[0006] Preferably, the side edge of the solar panel is connected to the side edge of the top surface of the nut body through a hinge, so that the outer end of the screw rod supports the solar panel to form a certain tilt angle when the alarm device is used.

[0007] Preferably, the light-emitting alarm element includes a microfarad capacitor, a light-emitting diode, a transistor, a resistor and an external power supply. The cathode of the light-emitting diode is connected to the microfarad capacitor, the anode is connected to the collector of the transistor, the emitter of the transistor is connected to the positive electrode of the microfarad capacitor, the positive electrode of the external power supply is connected to the resistor and then connected to the positive electrode of the microfarad capacitor, and the negative electrode of the external power supply is connected to the negative electrode of the microfarad capacitor.

[0008] Preferably, a limiting plate is provided on the top of the striker, and the metal end of the top of the striker is located on the limiting plate. The limiting plate is provided with a spring located outside the metal end. The top of the spring is insulated and supported on the bottom surface of the conductive plate. A limiting tooth is provided on the striker, and the limiting tooth is clamped on the top of the fixed tube.

[0009] Preferably, a guide tube is sleeved on the firing pin, and the guide tube is fixed in the cavity to ensure that the firing pin does not deviate significantly when moving after being hit.

[0010] Preferably, the firing pins are provided in three groups and are evenly distributed in the cavity of the nut body around the threaded hole to ensure that the bottom of the firing pin is in contact with the fastening nut.

[0011] Compared with the shortcomings and deficiencies of the prior art, the utility model has the following beneficial effects:

[0012] (1) The utility model provides a bolt loosening alarm device with a nut structure, which is fixed to a screw rod by a threaded connection. A cavity for accommodating an audible and visual alarm device is provided in the nut body. A striker with a metal end provided in the cavity can collide with the striker when the bolt, screw rod or fastening nut is loosened, thereby connecting a circuit through the contact between the striker and the conductive plate, and the audible and visual alarm device sends out an alarm signal, thereby providing a more comprehensive monitoring of bolt loosening.

[0013] (2) The utility model has a solar cell panel on the top surface of the nut body to provide power for the device, which has the advantages of being environmentally friendly, pollution-free, having a high-efficiency light source, and having a long service life.

[0014] (3) After the nut body is fixed on the bolt, the tilt angle of the solar panel is achieved by the outer end of the screw extending out of the threaded hole of the nut body to provide support for the solar panel. There is no need to design an additional support structure for the solar panel, and the structure is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a bolt loosening alarm device provided in an embodiment of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the hinge opening of the bolt loosening alarm device provided by an embodiment of the utility model.

[0017] Figure 3It is a schematic diagram of the internal structure of the bolt loosening alarm device provided by an embodiment of the utility model.

[0018] Figure 4 It is a schematic diagram of the structure of the firing pin provided in the embodiment of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the bolt loosening alarm device provided in the embodiment of the utility model.

[0020] In the figure: 1. nut body; 2. solar cell panel; 3. hinge; 4. threaded hole; 5. cavity; 6. sealing cover; 7. conductive plate; 8. battery; 9. striker; 901. limit tooth; 902. limit plate; 903. metal end; 10. buzzer; 11. microfarad capacitor; 12. light emitting diode; 13. transistor; 14. resistor; 15. fixing tube; 16. guide tube; 17. spring; 18. sound hole; 19. light hole; 20. bolt; 201. screw; 202. fastening nut. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] Reference Figure 1 The bolt loosening alarm device comprises a nut body 1, a solar panel 2 is arranged on the top surface of the nut body 1, and the side edge of the solar panel 2 is connected to the side edge of the top surface of the nut body 1 through a hinge 3.

[0023] Reference Figure 2-3A threaded hole 4 matching the bolt thread is provided on the nut body 1, a cavity 5 is provided inside the nut body 1, the top surface of the cavity 5 is a conductive plate 7, and a sealing cover 6 is provided on the top of the conductive plate 7; a battery 8, a striker 9, a buzzer 10, a luminous alarm element and a fixing tube 15 are provided in the cavity 5, the solar panel 2 is electrically connected to the battery 8 to charge the battery 8, the battery 8 is electrically connected to the metal end 903 at the top of the striker 9 through a wire, the buzzer 10 and the luminous alarm element are connected in parallel between the battery 8 and the conductive plate 7 through a wire, and a sound hole 18 and a light-transmitting hole 19 are provided on the nut body 1. The light-emitting alarm element includes a microfarad capacitor 11, a light-emitting diode 12, a transistor 13, a resistor 14 and an external power supply. The cathode of the light-emitting diode 12 is connected to the microfarad capacitor 11, the anode is connected to the collector of the transistor 13, the emitter of the transistor 13 is connected to the anode of the microfarad capacitor 11, the anode of the external power supply is connected to the resistor 14 and then connected to the anode of the microfarad capacitor 11, and the cathode of the external power supply is connected to the cathode of the microfarad capacitor 11. The transistor 13 adopts S8050, the value of the microfarad capacitor 11 is 2200UF, the resistor 14 is a 1K resistor, and there are four 1.5V light-emitting diodes 12. The S8050 transistor 13 is mainly used for high-frequency amplification; the 2200UF microfarad capacitor 11 is mainly used for the undetermined output voltage stabilization function; the 1K resistor 14 limits the current size and adjusts the voltage.

[0024] The striker 9 is sleeved with a guide tube 16, which is fixed in the cavity 5. Figure 4 The top of the striker 9 is provided with a limiting piece 902, and the metal end 903 at the top of the striker 9 is located on the limiting piece 902. The limiting piece 902 is provided with a spring 17 located outside the metal end 903. The top of the spring 17 is insulated and supported on the bottom surface of the conductive plate 7, and the metal end 903 at the top of the striker 9 is limited and set below the conductive plate 7 by the spring 17. The striker 9 is provided with a limiting tooth 901, which is clamped on the top of the fixing tube 15, and the bottom of the striker 9 extends out of the bottom surface of the nut body 1. There are three groups of strikers 9, and they are evenly distributed in the cavity 5 of the nut body 1 around the threaded hole 4.

[0025] When in use, after the fastening nut 202 is installed on the bolt 20, the nut body 1 is installed on the outer end of the screw rod 201 through the threaded hole 4, and the outer end of the screw rod 201 extends out of the nut body 1 to form a support for the solar panel 2, so that the solar panel 2 has a certain tilt angle, and the bottom end of the striker 9 extending out of the nut body 1 is close to the fastening nut 202, referring to Figure 5, the bottom ends of the three groups of strikers 9 can ensure that they are in contact with the fastening nut 202 when the bolt is loosened. The first thread of the nut body 1 has high precision and can be highly tightly connected with the screw rod 201 to prevent the nut body 1 from loosening during long-term use. When the screw rod 201 is loose, the screw rod 201 drives the nut body 1 to move closer to the fastening nut 202 until the bottom end of the striker 9 collides with the fastening nut 202 and the sound and light alarm circuit inside the nut body 1 is turned on, generating an alarm; when the fastening nut 202 is loose, the fastening nut 202 moves outward close to the nut body 1 until it collides with the bottom end of the striker 9 and the sound and light alarm circuit inside the nut body 1 is turned on, generating an alarm.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bolt loosening alarm device, characterized in that: It includes a nut body, which is provided with a threaded hole that matches the bolt thread, the top surface of the nut body is provided with a solar panel, and a cavity is provided inside the nut body. The top surface of the cavity is a conductive plate, and the top of the conductive plate is provided with a sealing cover; a battery, a striker, a buzzer, a luminous alarm element and a fixing tube are provided in the cavity, the solar panel is electrically connected to the battery, the battery is electrically connected to the metal end at the top of the striker through a wire, the battery and the conductive plate are connected in parallel with the buzzer and the luminous alarm element through a wire, the nut body is provided with a sound-through hole and a light-transmitting hole, the striker is movably clamped in the fixing tube, and the metal end at the top of the striker is set below the conductive plate by a spring limiter, and the bottom of the striker extends out of the bottom surface of the nut body.

2. The bolt loosening alarm device according to claim 1, characterized in that: The side edge of the solar cell panel is connected to the side edge of the top surface of the nut body through a hinge.

3. The bolt loosening alarm device according to claim 1, characterized in that: The light-emitting alarm element includes a microfarad capacitor, a light-emitting diode, a transistor, a resistor and an external power supply. The cathode of the light-emitting diode is connected to the microfarad capacitor, the anode is connected to the collector of the transistor, the emitter of the transistor is connected to the anode of the microfarad capacitor, the anode of the external power supply is connected to the resistor and then connected to the anode of the microfarad capacitor, and the cathode of the external power supply is connected to the cathode of the microfarad capacitor.

4. The bolt loosening alarm device according to claim 1, characterized in that: A limiting plate is provided on the top of the striker, and the metal end of the striker is located on the limiting plate. A spring is provided on the limiting plate and is located outside the metal end. The top of the spring is insulated and supported on the bottom surface of the conductive plate. A limiting tooth is provided on the striker, and the limiting tooth is clamped on the top of the fixing tube.

5. The bolt loosening alarm device according to claim 4, characterized in that: A guide tube is sleeved on the striker, and the guide tube is fixed in the cavity.

6. The bolt loosening alarm device according to claim 5, characterized in that: The strikers are provided in three groups and are evenly distributed in the cavity of the nut body around the threaded hole.

Images