Fastening device, passenger air conditioner and passenger vehicle

Abstract

The utility model provides a kind of fastening device, passenger train air conditioner and passenger train, it is related to air conditioning technical field, solve the technical problem of the fastening device rust prevention relaxation effect generally.The fastening device, including for connecting two lower fastening components and upper fastening components of the piece to be connected;Lower fastening component is provided with intelligent heating dehumidification module and gravity monitoring module in;Upper fastening component is detachably connected with lower fastening component by anti -drop structure;Anti -drop structure includes main core, lock core, secondary core, transmission gear set, connecting rod, stop block.The utility model zigzag recess mechanism has realized mechanical absolute anti -looseness, and through gravity perception and electric heating dehumidification impurity removal closed loop, it has realized intelligent active rust prevention, and the synergistic effect of both, simultaneously achieved waterproof effect, provide a kind of efficient, reliable, intelligent comprehensive solution for solving fastening problem under harsh environment.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a fastening device, a bus air conditioner, and a bus. Background Technology

[0002] Bolts, nuts, and other threaded fasteners are the most basic and widely used components in industrial assembly and structural connections. However, in harsh environments with high humidity and salt spray, such as outdoor engineering, shipbuilding, chemical plants, coastal facilities, and underground engineering, traditional fasteners face severe challenges: First, environmental moisture and corrosive media can penetrate the gaps between the threads, leading to thread corrosion and making disassembly difficult; second, under long-term vibration and load fluctuations, and when tightening and loosening bolts, if they are not kept horizontal with the nut but are driven in at an angle, the fasteners are prone to loosening or even stripping and falling off, i.e., "stripping," leading to connection failure.

[0003] Common existing anti-rust and anti-slip measures include: 1. Surface treatment and coating: such as galvanizing and applying anti-rust oil. These passive protection methods have limited effectiveness. Once the coating is worn or scratched, the protection immediately fails, and regular maintenance costs are high. 2. Mechanical anti-loosening: such as using spring washers, double nuts, self-locking nuts, etc. These methods mainly solve the problem of loosening, but their contribution to waterproofing and rust prevention is limited, and sometimes they can increase the volume and complexity of the structure. 3. Sealant: such as applying anaerobic adhesive. Although it can play a certain role in sealing and preventing loosening, it is extremely difficult to disassemble, requiring heating or strong force to destroy, which does not meet the requirements of reusability and convenient maintenance. Utility Model Content

[0004] The purpose of this utility model is to provide a fastening device, a bus air conditioner, and a bus to solve the technical problem that the fastening device in the prior art has a generally poor rust prevention and loosening effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This utility model provides a fastening device, comprising a lower fastening assembly and an upper fastening assembly for connecting two components to be connected; wherein: The lower fastening assembly is equipped with an intelligent heating and dehumidification module and a gravity monitoring module. The upper fastening assembly is detachably connected to the lower fastening assembly via an anti-detachment structure.

[0006] This invention's fastening device actively dissipates moisture within the threaded gaps through an intelligent heating and dehumidification module, inhibiting electrochemical corrosion and effectively improving rust prevention. The gravity monitoring module can sense the fastener's condition in real time, accurately detecting changes in the fastening device's gravity. A pre-programmed gravity threshold is set within the gravity monitoring module. When the detected value exceeds the threshold for a certain period, the module determines that the fastening environment is humid or contains excessive impurities, posing a risk of corrosion, and immediately activates the heating wire and heat-conducting filler. The heating power and time can be adjusted using PID control according to environmental conditions, automatically stopping once the detected gravity drops below a safe range. Bus drivers can also force the integrated heating to effectively evaporate infiltrated moisture via the vehicle's central control panel, keeping the connection points dry and fundamentally preventing rust.

[0007] As a further improvement of this utility model, the intelligent heating and dehumidification module includes a mounting groove formed on the lower fastening component, a heating element and a thermally conductive filler filled in the mounting groove.

[0008] As a further improvement of this utility model, the heating element is an electric heating wire.

[0009] As a further improvement of this utility model, the gravity monitoring module includes a gravity sensor installed on the lower fastening assembly.

[0010] As a further improvement of this utility model, the lower fastening component is provided with a limiting groove for engaging the upper fastening component; after the upper fastening component is engaged in the limiting groove, it is connected to the lower fastening component through the anti-detachment structure.

[0011] This utility model is an intelligent fastening device that integrates sensing, execution, and protection. It can monitor the working status inside the fastening device in real time and automatically start the dehumidification, impurity removal, and rust prevention program when the gravity index exceeds the standard. At the same time, it achieves mechanical anti-loosening and anti-slip effects through the anti-loosening structure (nested locking structure), ultimately achieving comprehensive waterproof, rustproof, and anti-slip effects.

[0012] As a further improvement of this utility model, the upper fastening assembly includes a hollow upper shaft, interlocking serrations, an anti-detachment structure, and a mating groove; wherein: The diameter of the hollow upper shaft is adapted to the diameter of the limiting groove; The hollow upper shaft body has a toothed opening on its side wall; The limiting groove is provided with a matching groove; The anti-detachment structure is disposed in the hollow upper shaft body and is connected to the meshing saw teeth in a transmission manner, which can drive the meshing saw teeth to extend relative to the tooth opening and engage in the mating groove or retract back into the hollow upper shaft body.

[0013] As a further improvement of this utility model, it also includes a top cover, which is detachably disposed at the top opening of the hollow upper shaft.

[0014] As a further improvement of this utility model, the top cover is detachably mounted on the hollow upper shaft via a thread.

[0015] As a further improvement of this utility model, the number of the interlocking saw teeth is two sets, and the two sets of interlocking saw teeth are arranged opposite to each other on both sides of the hollow upper shaft.

[0016] As a further improvement of this utility model, the anti-detachment structure includes a main core, a lock core, a secondary core, a transmission gear set, a connecting rod, and a stop block; wherein: The main core is fixed inside the hollow upper shaft body; The lock cylinder is rotatably mounted on the top of the main cylinder; The transmission gear set is fixedly connected to the connecting bushing and the auxiliary core, respectively; The secondary core is rotatably disposed within the hollow upper shaft body; There are two connecting rods, which are respectively connected to the two sets of meshing saw teeth; The number of stops is at least two, each connected to one of the two connecting rods, and a portion of the stop abuts against the transmission teeth of the transmission gear set.

[0017] As a further improvement of this utility model, it also includes a telescopic guide member disposed on the connecting rod and a guide groove formed in the hollow upper shaft body; the telescopic guide member is slidably disposed in the guide groove.

[0018] As a further improvement of this utility model, the transmission gear set includes two gears stacked one on top of the other.

[0019] As a further improvement of this utility model, the anti-detachment structure also includes a position locking component. The bottom of the locking component is detachably disposed in the hollow upper shaft body. The locking component has a slot, and the stop block can be inserted into the slot.

[0020] This utility model's fastening device achieves active intelligent rust prevention, transforming passive protection into proactive intervention. Through real-time gravity monitoring and intelligent heating, dehumidification, and impurity removal, it fundamentally eliminates the conditions for rust corrosion. Its rust prevention effect far surpasses traditional coating methods, and it boasts a longer lifespan. Combining the immense mechanical locking force generated by the nested locking mechanism with the anti-loosening advantage of maintaining mechanical structural precision in a dry, rust-free environment, its anti-loosening and anti-slip performance is extremely reliable. Heating, dehumidification, and impurity removal keep the fastening device's interior in a dry, positive pressure state, effectively preventing the intrusion of external liquids and impurities, achieving long-lasting sealing and waterproofing. It is reusable, easy to operate, and has low maintenance costs. For disassembly, the hollow upper shaft can be easily unscrewed by rotating the keyhole to retract the meshing teeth into the hollow upper shaft. All electronic modules are reusable, resulting in low maintenance costs.

[0021] The present invention provides a bus air conditioner, including a panel, a chassis, and a fastening device as described above; the fastening device is used to connect the panel and the chassis.

[0022] The bus air conditioner of this utility model has the following beneficial effects: 1. Intelligent and proactive rust prevention: Through closed-loop control of "sensing-decision-execution", the integrated heating wire can be activated to dehumidify and remove impurities when needed, which is highly efficient and energy-saving. Furthermore, the integrated heating can be forcibly and actively executed through the main control console, which fundamentally prevents rust from occurring, far exceeding the effectiveness and reliability of passive protection.

[0023] 2. Absolutely reliable anti-loosening: The mechanical interlocking structure of the interlocking saw teeth and the mating groove provides a positive locking force that exceeds friction. Its anti-loosening principle is based on mechanical interference rather than friction. Under strong vibration, the anti-loosening effect is extremely reliable, avoiding the thread damage caused by tilting during bolt installation and disassembly, and eliminating stripping.

[0024] 3. Integrated protection: It innovatively integrates two functions, rust prevention (electric heating dehumidification and impurity removal) and loosening prevention (mechanical locking), into a standard fastener system, while achieving a sealing and waterproof effect, thus solving the problem of insufficient protection by a single measure.

[0025] This utility model provides a bus, including the bus air conditioner.

[0026] This utility model of a passenger vehicle achieves absolute mechanical anti-loosening through a sawtooth-groove mechanism, and achieves intelligent active rust prevention through a closed loop of gravity sensing and electrothermal dehumidification and impurity removal. The two work together to achieve waterproofing, providing an efficient, reliable and intelligent comprehensive solution for solving fastening problems in harsh environments. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of the fastening device of this utility model; Figure 2 This is a front view of the lower fastening component in the fastening device of this utility model; Figure 3 This is a diagram showing the installation location of the fastening device of this utility model on the air conditioning chassis of a bus; Figure 4 This is a three-dimensional structural diagram of the lower fastening component in the fastening device of this utility model; Figure 5 This is a three-dimensional structural diagram of the upper fastening component in the fastening device of this utility model; Figure 6 This is a three-dimensional structural diagram of the top cover in the upper fastening assembly of the fastening device of this utility model; Figure 7 This is a three-dimensional structural diagram of the hollow upper shaft in the upper fastening assembly of the fastening device of this utility model; Figure 8 This is a three-dimensional structural diagram (I) of the anti-detachment structure in the fastening device of this utility model; Figure 9 This is a three-dimensional structural diagram (II) of the anti-detachment structure in the fastening device of this utility model; Figure 10 This is a structural schematic diagram of the gravity monitoring module in the fastening device of this utility model; Figure 11 This is a schematic diagram of the heating wire and thermally conductive filler in the fastening device of this utility model; Figure 12 yes Figure 3 Enlarged view of part A in the middle; Figure 13 This is a schematic diagram of the panel structure of the passenger car air conditioner of this utility model.

[0029] In the picture: 1. Lower layer fastening components; 11. Mounting slot; 12. Sensor mounting and wiring holes; 13. Wiring holes for the electric heating dehumidification and impurity removal module; 14. Limiting groove; 15. Matching groove; 2. Upper fastening components; 21. Meshing serrations; 22. Top cover; 221. Handle; 222. Threaded section of the top cover; 23. Hollow upper shaft body; 231. Shaft thread section; 232. Locking limit slot; 233. Guide groove; 234. Main core limiting groove; 235. Secondary core limiting groove; 24. Lock cylinder; 241. Keyhole; 25. Connecting bushing; 26. Transmission gear set; 27. Secondary core; 28. Connecting rod; 281. Stop; 29. Locking components; 3. Chassis; 4. Panel; 5. Gravity monitoring module; 6. Heating wire and thermally conductive filler. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] Example 1 like Figures 1-13 As shown, this utility model provides a fastening device, including a lower fastening component 1 and an upper fastening component 2 for connecting two components to be connected; specifically, in this embodiment, the two components to be connected are a panel 4 and a chassis 3 in a bus air conditioner; the following description will use the panel 4 and chassis 3 as examples.

[0032] In this embodiment, The lower fastening component 1 is equipped with an intelligent heating and dehumidification module and a gravity monitoring module 5; specifically, the lower fastening component 1 is a cuboid structure, which is fixed to the chassis 3 by welding at the bottom, and the lower fastening component 1 is made of high-strength alloy steel. The upper fastening component 2 is detachably connected to the lower fastening component 1 through an anti-detachment structure.

[0033] This invention's fastening device actively dissipates moisture within the threaded gaps through an intelligent heating and dehumidification module, inhibiting electrochemical corrosion and effectively improving rust prevention. The gravity monitoring module 5 can sense the fastener's condition in real time, accurately detecting changes in the fastening device's gravity. A pre-programmed gravity threshold is set within the gravity monitoring module 5. When the detected value exceeds the threshold for a certain period, the module determines that the fastening environment is humid or contains numerous impurities, posing a risk of corrosion. It then activates the heating wire and thermally conductive filler 6. The heating power and time can be adjusted using PID control based on environmental conditions, automatically stopping once the detected gravity drops below a safe range. Bus drivers can also force the integrated heating to effectively evaporate infiltrated moisture via the vehicle's central control panel, keeping the connection points dry and fundamentally preventing corrosion.

[0034] Furthermore, the intelligent heating and dehumidification module includes a mounting groove 11 formed on the lower fastening component 1, a heating element and a thermally conductive filler filled in the mounting groove 11.

[0035] In this embodiment, the heating element is a heating wire.

[0036] As a further improvement of this utility model, the gravity monitoring module 5 includes a gravity sensor installed on the lower fastening assembly 1.

[0037] As a further improvement of this utility model, the lower fastening component 1 is provided with a limiting groove 14 for locking the upper fastening component 2; after the upper fastening component 2 is locked into the limiting groove 14, it is connected to the lower fastening component 1 through an anti-detachment structure.

[0038] Furthermore, the lower fastening assembly 1 has pre-drilled mounting slots 11 for placing the heating wire and thermally conductive filler 6, sensor mounting and wiring holes 12, and wiring holes 13 for the electric heating dehumidification and impurity removal module; a limiting groove 14 is pre-drilled at the top, and a mating groove 15 is formed in the limiting groove 14. After the lower fastening assembly 1 is connected to the chassis 3 of the bus air conditioner, it is fixedly connected around the perimeter by circumferential welding.

[0039] Heating wire and thermally conductive filler 6: Installed in the mounting slot 11 of the lower fastening device. The core of the heating wire and thermally conductive filler 6 is an alloy heating wire wrapped in a high-temperature resistant insulating tube. The heating wire converts electrical energy into heat energy. It is surrounded by magnesium oxide powder or similar high thermal conductivity insulating medium to ensure that the heat can be efficiently conducted to the fastening device body. The thermally conductive filler improves the internal heat transfer efficiency of the material and reduces thermal resistance. The combined effect of the heating wire and thermally conductive filler in the heating system is synergistic, achieving high-efficiency heating + rapid heat conduction + uniform temperature control. The lead wire of the heating wire and thermally conductive filler 6 is led out from the wiring hole 13 of the electric heating dehumidification and impurity removal module and connected to a miniature connector. This miniature connector communicates with the main control center console of the bus through an adapter board. Even when the newly added gravity index detected by the gravity monitoring module 5 is low, the bus driver can still force the integrated heating through the vehicle center console.

[0040] The gravity monitoring module 5 employs a miniaturized, high-precision capacitive gravity sensor chip, which is packaged and embedded in the sensor mounting and wiring hole 12 within the lower fastening device. The sensor's signal line is led out from the sensor mounting and wiring hole 12. This sensor is small in size, has a fast response speed, and can accurately detect changes in the gravity of the fastening device. A pre-written program within the gravity sensor chip sets a gravity threshold. When the detected value by the gravity monitoring module 5 continuously exceeds the threshold for a certain period, the gravity sensor chip determines that the fastening device environment is humid or that the fastening device contains many impurities, posing a risk of corrosion. It then activates the heating wire and thermally conductive filler 6. The heating power and time can be adjusted using PID control according to environmental conditions until the detected gravity of the fastening device drops below a safe range, at which point it automatically stops. The bus driver can also force the integrated heating to effectively evaporate any infiltrated moisture via the vehicle's central control panel, keeping the connection points dry and fundamentally preventing corrosion.

[0041] This utility model is an intelligent fastening device that integrates sensing, execution, and protection. It can monitor the working status inside the fastening device in real time and automatically start the dehumidification, impurity removal, and rust prevention program when the gravity index exceeds the standard. At the same time, it achieves mechanical anti-loosening and anti-slip effects through the anti-loosening structure (nested locking structure), ultimately achieving comprehensive waterproof, rustproof, and anti-slip effects.

[0042] As a further improvement of this utility model, the upper fastening component 2 includes a hollow upper shaft 23, interlocking serrations 21, an anti-detachment structure, and a mating groove 15; wherein: The diameter of the hollow upper shaft 23 is compatible with the diameter of the limiting groove 14; A toothed opening is provided on the side wall of the hollow upper shaft 23; A matching groove 15 is provided inside the limiting groove 14; The anti-detachment structure is set inside the hollow upper shaft 23 and is connected to the meshing saw teeth 21. It can drive the meshing saw teeth 21 to extend out of the tooth opening and engage in the mating groove 15 or retract back into the hollow upper shaft 23.

[0043] As a further improvement of this utility model, it also includes a top cover 22, which is detachably disposed at the top opening of the hollow upper shaft 23.

[0044] As a further improvement of this utility model, the top cover 22 is detachably mounted on the hollow upper shaft 23 by means of threads.

[0045] Specifically, the upper fastening component 2 is a hollow cylindrical shape and is made of high-strength alloy steel. In other words, the hollow upper shaft 23 is cylindrical and the top cover 22 is a disc-shaped structure that covers the top of the hollow upper shaft 23.

[0046] The top cover 22 is provided with an upper top cover threaded section 222 around its periphery, and the top of the hollow upper shaft 23 is provided with a shaft threaded section 231. The top cover 22 is screwed onto the shaft threaded section 231 through the upper top cover threaded section 222, thereby realizing the detachable connection between the top cover 22 and the hollow upper shaft 23. This facilitates later maintenance and replacement of internal components, and also achieves relative sealing between the internal components of the fastening device and the external environment, reducing the entry of moisture and impurities.

[0047] As a further improvement of this utility model, the number of meshing serrations 21 is two sets, and the two sets of meshing serrations 21 are arranged opposite to each other on both sides of the hollow upper shaft 23.

[0048] Each set of biting teeth 21 includes two parallel, oppositely arranged bar-shaped teeth.

[0049] As a further improvement of this utility model, the anti-detachment structure includes a main core, a lock core 24, a secondary core 27, a transmission gear set 26, a connecting rod 28, and a stop block 281; wherein: The main core is fixed inside the hollow upper shaft 23; The lock cylinder 24 is rotatably mounted on the top of the main cylinder; The transmission gear set 26 is fixedly connected to the connecting bushing 25 and the auxiliary core 27 respectively; The secondary core 27 is rotatably disposed inside the hollow upper shaft 23; There are two connecting rods 28, which are connected one-to-one with two sets of meshing serrations 21; There are at least two stop blocks 281, which are connected to two connecting rods 28 respectively, and a portion of the stop block 281 abuts against the transmission teeth of the transmission gear set 26.

[0050] In this embodiment, the main core is a quadrangular prism structure, and the secondary core 27 is a cylindrical structure. The main core and the lock core 24 are connected by a connecting bushing 25. When the lock core 24 rotates, it drives the connecting bushing 25 to rotate relative to the main core, thereby driving the transmission gear set 26 to rotate. The transmission gear set 26 drives the secondary core 27 to rotate, thereby realizing the parallel movement of the two connecting rods 28 that abut against the transmission gear set 26. When the connecting rods 28 move in parallel, they drive the meshing saw teeth 21 to extend and retract.

[0051] To facilitate the rotation of the lock cylinder 24, a keyhole 241 is provided on the top of the lock cylinder 24. The shape of the keyhole 241 is not limited, as long as it can be rotated by a tool.

[0052] As a further improvement of this utility model, it also includes a telescopic guide member disposed on the connecting rod 28 and a guide groove 233 opened in the hollow upper shaft 23; the telescopic guide member is slidably disposed in the guide groove 233.

[0053] As a further improvement of this utility model, the transmission gear set 26 includes two gears stacked on top of each other.

[0054] As a further improvement of this utility model, the anti-detachment structure also includes a position locking member 29. The bottom of the locking member 29 is detachably disposed in the hollow upper shaft 23. A slot is provided on the locking member 29, and the stop block 281 can be inserted into the slot.

[0055] Specifically, in order to facilitate the fixation of the anti-detachment structure in the hollow upper shaft 23, the bottom of the hollow upper shaft 23 is provided with a locking limit groove 232, a main core limit groove 234, and a secondary core limit groove 235; the depth of the limit groove 14 is 20mm.

[0056] It should be noted that, as Figures 7-9 The diagram shown is a structural schematic of an embodiment of the present invention. In this embodiment, two stops 281 are installed on each connecting rod 28, and only two locking and limiting grooves 232 are provided, which are respectively set to lock the positions of the meshing saw teeth 21 and the mating grooves 15 on the two connecting rods 28.

[0057] Of course, an embodiment with only one stop 281 can also be adopted. When each link 28 is only provided with a stop 281, four locking limit slots 232 need to be opened. Each pair of locking limit slots 232 is set to correspond to the position of the stop 281 when the biting saw tooth 21 is retracted and the position of the stop 281 when the biting saw tooth 21 is extended and engaged.

[0058] In use, insert the key into the keyhole 241 at the top of the lock cylinder 24 and rotate it. The connecting bushing 25 drives the transmission gear set 26 to rotate, causing the secondary core 27 to rotate synchronously. This drives the connecting rod 28 to move linearly along the guide groove 233, thereby achieving the extension and retraction control of the biting saw teeth 21. When the saw teeth are fully extended and engaged with the mating groove 15, insert the locking piece 29 from top to bottom into the locking limit groove 232. At this time, the stop block 281 falls into the slot, forming a mechanical self-locking mechanism to ensure that the structure is stable and cannot be disengaged.

[0059] This utility model's fastening device achieves active intelligent rust prevention, transforming passive protection into proactive intervention. Through real-time gravity monitoring and intelligent heating, dehumidification, and impurity removal, it fundamentally eliminates the conditions for rust corrosion. The rust prevention effect far surpasses traditional coating methods, and its lifespan is longer. Combining the enormous mechanical locking force generated by the nested locking mechanism with the anti-loosening advantage brought by the dry, rust-free environment maintaining the precision of the mechanical structure, its anti-loosening and anti-slip performance is extremely reliable. By heating, dehumidifying, and removing impurities, the fastening device maintains a dry and positive pressure state inside, effectively preventing the intrusion of external liquids and impurities, achieving long-lasting sealing and waterproofing. It is reusable, easy to operate, and has low maintenance costs. During disassembly, the hollow upper shaft 23 can be easily unscrewed by rotating the keyhole 241 to retract the biting saw teeth 21 into the hollow upper shaft 23. All electronic modules are reusable, resulting in low maintenance costs.

[0060] Example 2: like Figures 1-13 As shown, the present invention provides a bus air conditioner, including a panel 4, a chassis 3, and a fastening device as shown in Embodiment 1; wherein the fastening device is used to connect the panel 4 and the chassis 3 of the bus air conditioner.

[0061] like Figure 3 and Figure 12 As shown, panel 4 is installed on the roof of the bus after the air conditioner is hoisted to the roof. Then, panel 4 is hoisted onto the chassis 3 and covered. The holes on the upper part of panel 4 are aligned with the lower fastening component 1 installed on the chassis 3 and then fastened. The lower fastening component 1 is welded to the chassis 3. The upper fastening component 2 is then connected to the lower fastening component 1 through the fixing holes on panel 4, thereby fixing panel 4 and chassis 3.

[0062] like Figures 1-13 As shown, the fastening device includes a lower fastening assembly 1 and an upper fastening assembly 2 for connecting two components to be connected; specifically, in this embodiment, the two components to be connected are the panel 4 and the chassis 3 in the bus air conditioner; the following description will use the panel 4 and the chassis 3 as examples.

[0063] In this embodiment, The lower fastening component 1 is equipped with an intelligent heating and dehumidification module and a gravity monitoring module 5; specifically, the lower fastening component 1 is a cuboid structure, which is fixed to the chassis 3 by welding at the bottom, and the lower fastening component 1 is made of high-strength alloy steel. The upper fastening component 2 is detachably connected to the lower fastening component 1 through an anti-detachment structure.

[0064] This invention's fastening device actively dissipates moisture within the threaded gaps through an intelligent heating and dehumidification module, inhibiting electrochemical corrosion and effectively improving rust prevention. The gravity monitoring module 5 can sense the fastener's condition in real time, accurately detecting changes in the fastening device's gravity. A pre-programmed gravity threshold is set within the gravity monitoring module 5. When the detected value exceeds the threshold for a certain period, the module determines that the fastening environment is humid or contains numerous impurities, posing a risk of corrosion. It then activates the heating wire and thermally conductive filler 6. The heating power and time can be adjusted using PID control based on environmental conditions, automatically stopping once the detected gravity drops below a safe range. Bus drivers can also force the integrated heating to effectively evaporate infiltrated moisture via the vehicle's central control panel, keeping the connection points dry and fundamentally preventing corrosion.

[0065] Furthermore, the intelligent heating and dehumidification module includes a mounting groove 11 formed on the lower fastening component 1, a heating element and a thermally conductive filler filled in the mounting groove 11.

[0066] In this embodiment, the heating element is a heating wire.

[0067] As a further improvement of this utility model, the gravity monitoring module 5 includes a gravity sensor installed on the lower fastening assembly 1.

[0068] As a further improvement of this utility model, the lower fastening component 1 is provided with a limiting groove 14 for locking the upper fastening component 2; after the upper fastening component 2 is locked into the limiting groove 14, it is connected to the lower fastening component 1 through an anti-detachment structure.

[0069] Furthermore, the lower fastening assembly 1 has pre-drilled mounting slots 11 for placing the heating wire and thermally conductive filler 6, sensor mounting and wiring holes 12, and wiring holes 13 for the electric heating dehumidification and impurity removal module; a limiting groove 14 is pre-drilled at the top, and a mating groove 15 is formed in the limiting groove 14. After the lower fastening assembly 1 is connected to the chassis 3 of the bus air conditioner, it is fixedly connected around the perimeter by circumferential welding.

[0070] Heating wire and thermally conductive filler 6: Installed in the mounting slot 11 of the lower fastening device. The core of the heating wire and thermally conductive filler 6 is an alloy heating wire wrapped in a high-temperature resistant insulating tube. The heating wire converts electrical energy into heat energy. It is surrounded by magnesium oxide powder or similar high thermal conductivity insulating medium to ensure that the heat can be efficiently conducted to the fastening device body. The thermally conductive filler improves the internal heat transfer efficiency of the material and reduces thermal resistance. The combined effect of the heating wire and thermally conductive filler in the heating system is synergistic, achieving high-efficiency heating + rapid heat conduction + uniform temperature control. The lead wire of the heating wire and thermally conductive filler 6 is led out from the wiring hole 13 of the electric heating dehumidification and impurity removal module and connected to a miniature connector. This miniature connector communicates with the main control center console of the bus through an adapter board. Even when the newly added gravity index detected by the gravity monitoring module 5 is low, the bus driver can still force the integrated heating through the vehicle center console.

[0071] The gravity monitoring module 5 employs a miniaturized, high-precision capacitive gravity sensor chip, which is packaged and embedded in the sensor mounting and wiring hole 12 within the lower fastening device. The sensor's signal line is led out from the sensor mounting and wiring hole 12. This sensor is small in size, has a fast response speed, and can accurately detect changes in the gravity of the fastening device. A pre-written program within the gravity sensor chip sets a gravity threshold. When the detected value by the gravity monitoring module 5 continuously exceeds the threshold for a certain period, the gravity sensor chip determines that the fastening device environment is humid or that the fastening device contains many impurities, posing a risk of corrosion. It then activates the heating wire and thermally conductive filler 6. The heating power and time can be adjusted using PID control according to environmental conditions until the detected gravity of the fastening device drops below a safe range, at which point it automatically stops. The bus driver can also force the integrated heating to effectively evaporate any infiltrated moisture via the vehicle's central control panel, keeping the connection points dry and fundamentally preventing corrosion.

[0072] This utility model is an intelligent fastening device that integrates sensing, execution, and protection. It can monitor the working status inside the fastening device in real time and automatically start the dehumidification, impurity removal, and rust prevention program when the gravity index exceeds the standard. At the same time, it achieves mechanical anti-loosening and anti-slip effects through the anti-loosening structure (nested locking structure), ultimately achieving comprehensive waterproof, rustproof, and anti-slip effects.

[0073] As a further improvement of this utility model, the upper fastening component 2 includes a hollow upper shaft 23, interlocking serrations 21, an anti-detachment structure, and a mating groove 15; wherein: The diameter of the hollow upper shaft 23 is compatible with the diameter of the limiting groove 14; A toothed opening is provided on the side wall of the hollow upper shaft 23; A matching groove 15 is provided inside the limiting groove 14; The anti-detachment structure is set inside the hollow upper shaft 23 and is connected to the meshing saw teeth 21. It can drive the meshing saw teeth 21 to extend out of the tooth opening and engage in the mating groove 15 or retract back into the hollow upper shaft 23.

[0074] As a further improvement of this utility model, it also includes a top cover 22, which is detachably disposed at the top opening of the hollow upper shaft 23.

[0075] As a further improvement of this utility model, the top cover 22 is detachably mounted on the hollow upper shaft 23 by means of threads.

[0076] Specifically, the upper fastening component 2 is a hollow cylindrical shape and is made of high-strength alloy steel. In other words, the hollow upper shaft 23 is cylindrical and the top cover 22 is a disc-shaped structure that covers the top of the hollow upper shaft 23.

[0077] The top cover 22 is provided with an upper top cover threaded section 222 around its periphery, and the top of the hollow upper shaft 23 is provided with a shaft threaded section 231. The top cover 22 is screwed onto the shaft threaded section 231 through the upper top cover threaded section 222, thereby realizing the detachable connection between the top cover 22 and the hollow upper shaft 23. This facilitates later maintenance and replacement of internal components, and also achieves relative sealing between the internal components of the fastening device and the external environment, reducing the entry of moisture and impurities.

[0078] As a further improvement of this utility model, the number of meshing serrations 21 is two sets, and the two sets of meshing serrations 21 are arranged opposite to each other on both sides of the hollow upper shaft 23.

[0079] Each set of biting teeth 21 includes two parallel, oppositely arranged bar-shaped teeth.

[0080] As a further improvement of this utility model, the anti-detachment structure includes a main core, a lock core 24, a secondary core 27, a transmission gear set 26, a connecting rod 28, and a stop block 281; wherein: The main core is fixed inside the hollow upper shaft 23; The lock cylinder 24 is rotatably mounted on the top of the main cylinder; The transmission gear set 26 is fixedly connected to the connecting bushing 25 and the auxiliary core 27 respectively; The secondary core 27 is rotatably disposed inside the hollow upper shaft 23; There are two connecting rods 28, which are connected one-to-one with two sets of meshing serrations 21; There are at least two stop blocks 281, which are connected to two connecting rods 28 respectively, and a portion of the stop block 281 abuts against the transmission teeth of the transmission gear set 26.

[0081] In this embodiment, the main core is a quadrangular prism structure, and the secondary core 27 is a cylindrical structure. The main core and the lock core 24 are connected by a connecting bushing 25. When the lock core 24 rotates, it drives the connecting bushing 25 to rotate relative to the main core, thereby driving the transmission gear set 26 to rotate. The transmission gear set 26 drives the secondary core 27 to rotate, thereby realizing the parallel movement of the two connecting rods 28 that abut against the transmission gear set 26. When the connecting rods 28 move in parallel, they drive the meshing saw teeth 21 to extend and retract.

[0082] To facilitate the rotation of the lock cylinder 24, a keyhole 241 is provided on the top of the lock cylinder 24. The shape of the keyhole 241 is not limited, as long as it can be rotated by a tool.

[0083] As a further improvement of this utility model, it also includes a telescopic guide member disposed on the connecting rod 28 and a guide groove 233 opened in the hollow upper shaft 23; the telescopic guide member is slidably disposed in the guide groove 233.

[0084] As a further improvement of this utility model, the transmission gear set 26 includes two gears stacked on top of each other.

[0085] As a further improvement of this utility model, the anti-detachment structure also includes a position locking member 29. The bottom of the locking member 29 is detachably disposed in the hollow upper shaft 23. A slot is provided on the locking member 29, and the stop block 281 can be inserted into the slot.

[0086] Specifically, in order to facilitate the fixation of the anti-detachment structure in the hollow upper shaft 23, the bottom of the hollow upper shaft 23 is provided with a locking limit groove 232, a main core limit groove 234, and a secondary core limit groove 235; the depth of the limit groove 14 is 20mm.

[0087] It should be noted that, as Figures 7-9 The diagram shown is a structural schematic of an embodiment of the present invention. In this embodiment, two stops 281 are installed on each connecting rod 28, and only two locking and limiting grooves 232 are provided, which are respectively set to lock the positions of the meshing saw teeth 21 and the mating grooves 15 on the two connecting rods 28.

[0088] Of course, an embodiment with only one stop 281 can also be adopted. When each link 28 is only provided with a stop 281, four locking limit slots 232 need to be opened. Each pair of locking limit slots 232 is set to correspond to the position of the stop 281 when the biting saw tooth 21 is retracted and the position of the stop 281 when the biting saw tooth 21 is extended and engaged.

[0089] When using, such as Figure 3As shown, after the panel 4 is aligned with the chassis 3, the hollow upper shaft 23 of the upper fastening assembly 2 is aligned with the limiting groove 14 on the lower fastening assembly 1. The key is inserted into the keyhole 241 and rotated counterclockwise. At this time, the main core drives the connecting bushing 25, which in turn drives the transmission gear set 26 connected to the transmission bushing to rotate counterclockwise, and drives the transmission gear set 26 connected to the auxiliary core 27 to rotate clockwise. During the rotation of the transmission gear set 26, the stops 281 on the connecting rods 28 on both sides are driven to move horizontally to the left and right respectively. When the biting saw teeth 21 and the mating groove 15 are locked in both directions, radial elastic deformation occurs between them. The biting saw teeth 21 bite the mating groove 15, thereby achieving a strong mechanical locking. Place the locking component 29 into the locking limit groove 232. At this time, the upper fastening component 2 can no longer translate or rotate. Twist the handle 221 to engage and lock the upper cover threaded section 222 on the top cover 22 with the shaft threaded section 231. At this time, the bottom of the top cover 22 is in contact with the upper surface of the hollow upper shaft 23, and the vertical freedom of the hollow upper shaft 23 is completely constrained. Remove the key to complete the fixing of the lower fastening component 1 and the upper fastening component 2 to the bus air conditioning panel 4 on the bus air conditioning chassis 3.

[0090] When the panel 4 needs to be disassembled after the service, turn the handle 221 to open the top cover 22, take out the locking piece 29, and turn the key clockwise in the keyhole 241. At this time, the meshing saw teeth 21 retract, and the stops 281 on the two connecting rods 28 move closer to each other under the drive of the transmission gear set 26. The meshing saw teeth 21 retract into the hollow upper shaft 23, and the upper fastening component 2 can be pulled out. At this time, the bus air conditioning panel 4 can be disassembled.

[0091] The bus air conditioner of this utility model has the following beneficial effects: 1. Intelligent and proactive rust prevention: Through closed-loop control of "sensing-decision-execution", the integrated heating wire can be activated to dehumidify and remove impurities when needed, which is highly efficient and energy-saving. Furthermore, the integrated heating can be forcibly and actively executed through the main control console, which fundamentally prevents rust from occurring, far exceeding the effectiveness and reliability of passive protection.

[0092] 2. Absolutely reliable anti-loosening: The mechanical interlocking structure of the meshing saw teeth 21 and the mating groove 15 provides a positive locking force that exceeds friction. Its anti-loosening principle is based on mechanical interference rather than friction. Under strong vibration, the anti-loosening effect is extremely reliable, avoiding the thread damage caused by tilting during bolt installation and disassembly, and eliminating stripping.

[0093] 3. Integrated protection: It innovatively integrates two functions, rust prevention (electric heating dehumidification and impurity removal) and loosening prevention (mechanical locking), into a standard fastener system, while achieving a sealing and waterproof effect, thus solving the problem of insufficient protection by a single measure.

[0094] Example 3: The present invention provides a bus, including the bus air conditioner in Embodiment 2.

[0095] The bus air conditioner includes a panel 4, a chassis 3, and a fastening device; wherein, the fastening device is used to connect the bus air conditioner panel 4 and the chassis 3.

[0096] like Figure 3 and Figure 12 As shown, panel 4 is installed on the roof of the bus after the air conditioner is hoisted to the roof. Then, panel 4 is hoisted onto the chassis 3 and covered. The holes on the upper part of panel 4 are aligned with the lower fastening component 1 installed on the chassis 3 and then fastened. The lower fastening component 1 is welded to the chassis 3. The upper fastening component 2 is then connected to the lower fastening component 1 through the fixing holes on panel 4, thereby fixing panel 4 and chassis 3.

[0097] like Figures 1-13 As shown, the fastening device includes a lower fastening assembly 1 and an upper fastening assembly 2 for connecting two components to be connected; specifically, in this embodiment, the two components to be connected are the panel 4 and the chassis 3 in the bus air conditioner; the following description will use the panel 4 and the chassis 3 as examples.

[0098] In this embodiment, The lower fastening component 1 is equipped with an intelligent heating and dehumidification module and a gravity monitoring module 5; specifically, the lower fastening component 1 is a cuboid structure, which is fixed to the chassis 3 by welding at the bottom, and the lower fastening component 1 is made of high-strength alloy steel. The upper fastening component 2 is detachably connected to the lower fastening component 1 through an anti-detachment structure.

[0099] This invention's fastening device actively dissipates moisture within the threaded gaps through an intelligent heating and dehumidification module, inhibiting electrochemical corrosion and effectively improving rust prevention. The gravity monitoring module 5 can sense the fastener's condition in real time, accurately detecting changes in the fastening device's gravity. A pre-programmed gravity threshold is set within the gravity monitoring module 5. When the detected value exceeds the threshold for a certain period, the module determines that the fastening environment is humid or contains numerous impurities, posing a risk of corrosion. It then activates the heating wire and thermally conductive filler 6. The heating power and time can be adjusted using PID control based on environmental conditions, automatically stopping once the detected gravity drops below a safe range. Bus drivers can also force the integrated heating to effectively evaporate infiltrated moisture via the vehicle's central control panel, keeping the connection points dry and fundamentally preventing corrosion.

[0100] Furthermore, the intelligent heating and dehumidification module includes a mounting groove 11 formed on the lower fastening component 1, a heating element and a thermally conductive filler filled in the mounting groove 11.

[0101] In this embodiment, the heating element is a heating wire.

[0102] As a further improvement of this utility model, the gravity monitoring module 5 includes a gravity sensor installed on the lower fastening assembly 1.

[0103] As a further improvement of this utility model, the lower fastening component 1 is provided with a limiting groove 14 for locking the upper fastening component 2; after the upper fastening component 2 is locked into the limiting groove 14, it is connected to the lower fastening component 1 through an anti-detachment structure.

[0104] Furthermore, the lower fastening assembly 1 has pre-drilled mounting slots 11 for placing the heating wire and thermally conductive filler 6, sensor mounting and wiring holes 12, and wiring holes 13 for the electric heating dehumidification and impurity removal module; a limiting groove 14 is pre-drilled at the top, and a mating groove 15 is formed in the limiting groove 14. After the lower fastening assembly 1 is connected to the chassis 3 of the bus air conditioner, it is fixedly connected around the perimeter by circumferential welding.

[0105] Heating wire and thermally conductive filler 6: Installed in the mounting slot 11 of the lower fastening device. The core of the heating wire and thermally conductive filler 6 is an alloy heating wire wrapped in a high-temperature resistant insulating tube. The heating wire converts electrical energy into heat energy. It is surrounded by magnesium oxide powder or similar high thermal conductivity insulating medium to ensure that the heat can be efficiently conducted to the fastening device body. The thermally conductive filler improves the internal heat transfer efficiency of the material and reduces thermal resistance. The combined effect of the heating wire and thermally conductive filler in the heating system is synergistic, achieving high-efficiency heating + rapid heat conduction + uniform temperature control. The lead wire of the heating wire and thermally conductive filler 6 is led out from the wiring hole 13 of the electric heating dehumidification and impurity removal module and connected to a miniature connector. This miniature connector communicates with the main control center console of the bus through an adapter board. Even when the newly added gravity index detected by the gravity monitoring module 5 is low, the bus driver can still force the integrated heating through the vehicle center console.

[0106] The gravity monitoring module 5 employs a miniaturized, high-precision capacitive gravity sensor chip, which is packaged and embedded in the sensor mounting and wiring hole 12 within the lower fastening device. The sensor's signal line is led out from the sensor mounting and wiring hole 12. This sensor is small in size, has a fast response speed, and can accurately detect changes in the gravity of the fastening device. A pre-written program within the gravity sensor chip sets a gravity threshold. When the detected value by the gravity monitoring module 5 continuously exceeds the threshold for a certain period, the gravity sensor chip determines that the fastening device environment is humid or that the fastening device contains many impurities, posing a risk of corrosion. It then activates the heating wire and thermally conductive filler 6. The heating power and time can be adjusted using PID control according to environmental conditions until the detected gravity of the fastening device drops below a safe range, at which point it automatically stops. The bus driver can also force the integrated heating to effectively evaporate any infiltrated moisture via the vehicle's central control panel, keeping the connection points dry and fundamentally preventing corrosion.

[0107] This utility model is an intelligent fastening device that integrates sensing, execution, and protection. It can monitor the working status inside the fastening device in real time and automatically start the dehumidification, impurity removal, and rust prevention program when the gravity index exceeds the standard. At the same time, it achieves mechanical anti-loosening and anti-slip effects through the anti-loosening structure (nested locking structure), ultimately achieving comprehensive waterproof, rustproof, and anti-slip effects.

[0108] As a further improvement of this utility model, the upper fastening component 2 includes a hollow upper shaft 23, interlocking serrations 21, an anti-detachment structure, and a mating groove 15; wherein: The diameter of the hollow upper shaft 23 is compatible with the diameter of the limiting groove 14; A toothed opening is provided on the side wall of the hollow upper shaft 23; A matching groove 15 is provided inside the limiting groove 14; The anti-detachment structure is set inside the hollow upper shaft 23 and is connected to the meshing saw teeth 21. It can drive the meshing saw teeth 21 to extend out of the tooth opening and engage in the mating groove 15 or retract back into the hollow upper shaft 23.

[0109] As a further improvement of this utility model, it also includes a top cover 22, which is detachably disposed at the top opening of the hollow upper shaft 23.

[0110] As a further improvement of this utility model, the top cover 22 is detachably mounted on the hollow upper shaft 23 by means of threads.

[0111] Specifically, the upper fastening component 2 is a hollow cylindrical shape and is made of high-strength alloy steel. In other words, the hollow upper shaft 23 is cylindrical and the top cover 22 is a disc-shaped structure that covers the top of the hollow upper shaft 23.

[0112] The top cover 22 is provided with an upper top cover threaded section 222 around its periphery, and the top of the hollow upper shaft 23 is provided with a shaft threaded section 231. The top cover 22 is screwed onto the shaft threaded section 231 through the upper top cover threaded section 222, thereby realizing the detachable connection between the top cover 22 and the hollow upper shaft 23. This facilitates later maintenance and replacement of internal components, and also achieves relative sealing between the internal components of the fastening device and the external environment, reducing the entry of moisture and impurities.

[0113] As a further improvement of this utility model, the number of meshing serrations 21 is two sets, and the two sets of meshing serrations 21 are arranged opposite to each other on both sides of the hollow upper shaft 23.

[0114] Each set of biting teeth 21 includes two parallel, oppositely arranged bar-shaped teeth.

[0115] As a further improvement of this utility model, the anti-detachment structure includes a main core, a lock core 24, a secondary core 27, a transmission gear set 26, a connecting rod 28, and a stop block 281; wherein: The main core is fixed inside the hollow upper shaft 23; The lock cylinder 24 is rotatably mounted on the top of the main cylinder; The transmission gear set 26 is fixedly connected to the connecting bushing 25 and the auxiliary core 27 respectively; The secondary core 27 is rotatably disposed inside the hollow upper shaft 23; There are two connecting rods 28, which are connected one-to-one with two sets of meshing serrations 21; There are at least two stop blocks 281, which are connected to two connecting rods 28 respectively, and a portion of the stop block 281 abuts against the transmission teeth of the transmission gear set 26.

[0116] In this embodiment, the main core is a quadrangular prism structure, and the secondary core 27 is a cylindrical structure. The main core and the lock core 24 are connected by a connecting bushing 25. When the lock core 24 rotates, it drives the connecting bushing 25 to rotate relative to the main core, thereby driving the transmission gear set 26 to rotate. The transmission gear set 26 drives the secondary core 27 to rotate, thereby realizing the parallel movement of the two connecting rods 28 that abut against the transmission gear set 26. When the connecting rods 28 move in parallel, they drive the meshing saw teeth 21 to extend and retract.

[0117] To facilitate the rotation of the lock cylinder 24, a keyhole 241 is provided on the top of the lock cylinder 24. The shape of the keyhole 241 is not limited, as long as it can be rotated by a tool.

[0118] As a further improvement of this utility model, it also includes a telescopic guide member disposed on the connecting rod 28 and a guide groove 233 opened in the hollow upper shaft 23; the telescopic guide member is slidably disposed in the guide groove 233.

[0119] As a further improvement of this utility model, the transmission gear set 26 includes two gears stacked on top of each other.

[0120] As a further improvement of this utility model, the anti-detachment structure also includes a position locking member 29. The bottom of the locking member 29 is detachably disposed in the hollow upper shaft 23. A slot is provided on the locking member 29, and the stop block 281 can be inserted into the slot.

[0121] Specifically, in order to facilitate the fixation of the anti-detachment structure in the hollow upper shaft 23, the bottom of the hollow upper shaft 23 is provided with a locking limit groove 232, a main core limit groove 234, and a secondary core limit groove 235; the depth of the limit groove 14 is 20mm.

[0122] It should be noted that, as Figures 7-9 The diagram shown is a structural schematic of an embodiment of the present invention. In this embodiment, two stops 281 are installed on each connecting rod 28, and only two locking and limiting grooves 232 are provided, which are respectively set to lock the positions of the meshing saw teeth 21 and the mating grooves 15 on the two connecting rods 28.

[0123] Of course, an embodiment with only one stop 281 can also be adopted. When each link 28 is only provided with a stop 281, four locking limit slots 232 need to be opened. Each pair of locking limit slots 232 is set to correspond to the position of the stop 281 when the biting saw tooth 21 is retracted and the position of the stop 281 when the biting saw tooth 21 is extended and engaged.

[0124] When using, such as Figure 3 As shown, after the panel 4 is aligned with the chassis 3, the hollow upper shaft 23 of the upper fastening assembly 2 is aligned with the limiting groove 14 on the lower fastening assembly 1. The key is inserted into the keyhole 241 and rotated counterclockwise. At this time, the main core drives the connecting bushing 25, which in turn drives the transmission gear set 26 connected to the transmission bushing to rotate counterclockwise, and drives the transmission gear set 26 connected to the auxiliary core 27 to rotate clockwise. During the rotation of the transmission gear set 26, the stops 281 on the connecting rods 28 on both sides are driven to move horizontally to the left and right respectively. When the biting saw teeth 21 and the mating groove 15 are locked in both directions, radial elastic deformation occurs between them. The biting saw teeth 21 bite the mating groove 15, thereby achieving a strong mechanical locking. Place the locking component 29 into the locking limit groove 232. At this time, the upper fastening component 2 can no longer translate or rotate. Twist the handle 221 to engage and lock the upper cover threaded section 222 on the top cover 22 with the shaft threaded section 231. At this time, the bottom of the top cover 22 is in contact with the upper surface of the hollow upper shaft 23, and the vertical freedom of the hollow upper shaft 23 is completely constrained. Remove the key to complete the fixing of the lower fastening component 1 and the upper fastening component 2 to the bus air conditioning panel 4 on the bus air conditioning chassis 3.

[0125] When the panel 4 needs to be disassembled after the service, turn the handle 221 to open the top cover 22, take out the locking piece 29, and turn the key clockwise in the keyhole 241. At this time, the meshing saw teeth 21 retract, and the stops 281 on the two connecting rods 28 move closer to each other under the drive of the transmission gear set 26. The meshing saw teeth 21 retract into the hollow upper shaft 23, and the upper fastening component 2 can be pulled out. At this time, the bus air conditioning panel 4 can be disassembled.

[0126] This utility model of a passenger vehicle achieves absolute mechanical anti-loosening through a sawtooth-groove mechanism, and achieves intelligent active rust prevention through a closed loop of gravity sensing and electrothermal dehumidification and impurity removal. The two work together to achieve waterproofing, providing an efficient, reliable and intelligent comprehensive solution for solving fastening problems in harsh environments.

[0127] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.

[0128] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0129] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0130] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0131] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0132] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0133] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A fastening device, characterized in that, Includes a lower fastening assembly and an upper fastening assembly for connecting two components to be connected; wherein: The lower fastening assembly is equipped with an intelligent heating and dehumidification module and a gravity monitoring module. The upper fastening assembly is detachably connected to the lower fastening assembly via an anti-detachment structure.

2. The fastening device according to claim 1, characterized in that, The intelligent heating and dehumidification module includes a mounting slot formed on the lower fastening assembly, a heating element and a thermally conductive filler filled in the mounting slot.

3. The fastening device according to claim 2, characterized in that, The gravity monitoring module includes a gravity sensor mounted on the lower fastening assembly.

4. The fastening device according to claim 1, characterized in that, The lower fastening component has a limiting groove for engaging the upper fastening component; after the upper fastening component is engaged in the limiting groove, it is connected to the lower fastening component through the anti-detachment structure.

5. The fastening device according to claim 4, characterized in that, The upper fastening assembly includes a hollow upper shaft, interlocking serrations, an anti-detachment structure, and a mating groove; wherein: The diameter of the hollow upper shaft is adapted to the diameter of the limiting groove; The hollow upper shaft body has a toothed opening on its side wall; The limiting groove is provided with a matching groove; The anti-detachment structure is disposed in the hollow upper shaft body and is connected to the meshing saw teeth in a transmission manner, which can drive the meshing saw teeth to extend relative to the tooth opening and engage in the mating groove or retract back into the hollow upper shaft body.

6. The fastening device according to claim 5, characterized in that, The number of the interlocking saw teeth is two sets, and the two sets of interlocking saw teeth are arranged opposite each other on both sides of the hollow upper shaft.

7. The fastening device according to claim 6, characterized in that, The anti-loosening structure includes a main core, a lock core, a secondary core, a transmission gear set, a connecting rod, and a stop block; wherein: The main core is fixed inside the hollow upper shaft body; The lock cylinder is rotatably mounted on the top of the main cylinder; The transmission gear set is fixedly connected to the connecting bushing and the auxiliary core, respectively; The secondary core is rotatably disposed within the hollow upper shaft body; There are two connecting rods, which are respectively connected to the two sets of meshing saw teeth; The number of stops is at least two, each connected to one of the two connecting rods, and a portion of the stop abuts against the transmission teeth of the transmission gear set.

8. The fastening device according to claim 7, characterized in that, It also includes a telescopic guide member disposed on the connecting rod and a guide groove formed in the hollow upper shaft body; the telescopic guide member is slidably disposed in the guide groove.

9. The fastening device according to claim 7, characterized in that, The transmission gear set includes two gears stacked one on top of the other.

10. The fastening device according to claim 7, characterized in that, The anti-detachment structure also includes a position locking component. The bottom of the locking component is detachably disposed in the hollow upper shaft body. The locking component has a slot, and the stop block can be inserted into the slot.

11. A bus air conditioner, characterized in that, It includes a panel, a chassis, and a fastening device as described in any one of claims 1-10; the fastening device is used to connect the panel and the chassis.

12. A passenger vehicle, characterized in that, Including the bus air conditioner as described in claim 11.

Images