Automobile intelligent fuse box and test equipment thereof

Abstract

The invention relates to the field of automobile part testing, and discloses an automobile intelligent fuse box and testing equipment thereof, the automobile intelligent fuse box comprises a box body assembly, the box body assembly comprises an upper cover body and a lower cover body, the upper cover body and the lower cover body are detachably connected through screws, a PCBA board is installed on the inner side of the box body assembly, and a cooling fin is installed at the lower end of the lower cover body; and the buckle connecting assembly comprises a plurality of connecting seats, each connecting seat is provided with a first limiting hole, one side wall of each connecting seat is provided with two dovetail strips and an elastic buckle, and the side wall of the upper cover body is provided with dovetail grooves corresponding to the dovetail strips. Compared with the prior art, through the design of the standard clamping structure and the replaceable connecting seat, the fuse box can adapt to different vehicle types only by replacing the customized connecting seat without modifying the core structure of the box body, so that the research and development period is greatly shortened, the production cost is reduced, the test equipment can simulate the vibration environment of two use environments of the fuse box, and the test efficiency is improved. And the application scene is better fit.

Description

Technical Field

[0001] This invention relates to the field of automotive parts testing, and more particularly to an automotive intelligent fuse box and its testing equipment. Background Technology

[0002] In automotive electrical systems, fuse boxes serve as critical safety protection components, bearing the important responsibility of distributing electrical energy and protecting circuits. With the rapid development of the automotive industry and the increasing diversification of vehicle models, different models place more complex and personalized demands on the installation location, spatial adaptability, and environmental suitability of fuse boxes.

[0003] Traditional automotive fuse boxes typically employ a fixed structure, tightly matching specific car models. When adapting to different models, large-scale modifications to the core structure of the box are often required. This not only significantly extends the development cycle and increases the difficulty and time cost of developing fuse boxes for new car models, but also significantly increases production costs due to redesign and mold making, hindering rapid product updates and market promotion.

[0004] Furthermore, automobiles typically have two fuse boxes, one installed under the hood and the other under the steering wheel. One box supplies high-power, engine-related electrical components such as headlights, fan, oil pump, ABS, and starter. The other box supplies interior electrical components such as windows, center console, cigarette lighter, audio system, and instrument panel. The fuse box under the hood must withstand high temperatures, while the one under the steering wheel is tilted downwards. Both fuse boxes are subject to vibration during vehicle operation. The tilted installation and high temperatures increase the risk of connection failures due to vibration. However, existing fuse box testing equipment has relatively limited functionality and cannot comprehensively and realistically simulate these different usage environments, especially the vibration conditions under different installation postures, leading to discrepancies between test results and actual usage scenarios. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an intelligent automotive fuse box and its testing equipment. Compared with existing technologies, this fuse box, through its standard snap-fit ​​structure and replaceable connector design, can adapt to different vehicle models without modifying the core structure of the box. This significantly shortens the R&D cycle and reduces production costs. The testing equipment can simulate the vibration environment of the fuse box in two different usage environments, making it more suitable for various usage scenarios.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A smart fuse box for automobiles includes a box assembly, which includes an upper cover and a lower cover. The upper cover and the lower cover are detachably connected by screws. A PCBA board is installed on the inner side of the box assembly, and a heat sink is installed at the lower end of the lower cover. The snap-fit ​​connection assembly includes several connecting seats, each of which has a first limiting hole. Each connecting seat has two dovetail strips and elastic buckles on one side wall. The side wall of the upper cover has dovetail grooves corresponding to the dovetail strips, and the side wall of the upper cover has wedge-shaped blocks corresponding to the elastic buckles. Both the dovetail strips and the dovetail grooves are wider at the top and narrower at the bottom.

[0007] This invention also discloses a testing device for an automotive intelligent fuse box, used to test the aforementioned fuse box. The device includes a housing, inside which two sealing plates are arranged. The two sealing plates and the inner wall of the housing together form a sealed space. A fixed frame is arranged within the sealed space. The fixed frame includes a supporting base plate, with two vertical plates symmetrically fixedly connected to the upper end of the supporting base plate. A top plate is fixedly connected to the upper end of the two vertical plates. Adjustable electric heating plates are installed on opposite sides of the two vertical plates. An adjustable placement mechanism is also disclosed, including a shaking plate disposed inside the fixed frame. Two hollow... A vertical plate and a shaking plate are each equipped with a distance measuring sensor at their upper ends. A mounting plate is placed between the two hollow vertical plates, and both ends of the mounting plate are rotatably connected to the corresponding hollow vertical plate via rotating shafts. A first motor is installed on one side of one of the hollow vertical plates. The output shaft of the first motor passes through the corresponding hollow vertical plate and is fixedly connected to the corresponding rotating shaft. The mounting plate has multiple second limiting holes that mate with the first limiting hole. An adjustable vibration mechanism is also included. This adjustable vibration mechanism employs intermittent vibration mode and continuous vibration mode. Combined with an adjustable placement mechanism and an adjustable electric heating plate, it can achieve vibration testing in high-temperature horizontal environments and vibration testing at room temperature tilt angles.

[0008] Preferably, the adjustable vibration mechanism includes a rotating rod rotatably connected between two vertical plates, with multiple cams fixedly connected to the rotating rod. Each cam engages with a vibrating plate. A second motor is mounted on one side of one of the vertical plates, and the output shaft of the second motor passes through the corresponding vertical plate and is fixedly connected to one end of the rotating rod. Multiple guide rods are fixedly connected to opposite sides of the two vertical plates, and the guide rods pass through the vibrating plate and are slidably connected. Several impact columns are fixedly connected to the lower end of the top plate.

[0009] Preferably, the upper end of the support base plate is symmetrically fixedly connected to two rectangular bars. The front and rear sides of the two rectangular bars are provided with second columnar grooves. A piston is slidably connected in each second columnar groove. The two matching second columnar grooves are connected through a connecting hole. The side of each piston near the corresponding connecting hole is connected to the corresponding second columnar groove through a fourth spring. An L-shaped blocking bar is fixedly connected to the other side of each piston. A guide plate that is slidably connected to the rectangular bar is fixedly connected to each L-shaped blocking bar. The lower end of the shaking plate is fixedly connected to multiple elastic telescopic plates. Each elastic telescopic plate has an L-shaped insert through its movable part. The vertical part of each L-shaped insert is elastically connected to the corresponding elastic telescopic plate through a third spring. The horizontal end of each L-shaped insert is inclined and cooperates with the corresponding L-shaped blocking strip.

[0010] Preferably, the upper end of the supporting base plate is provided with a columnar groove, and a third piston plate is slidably connected in the columnar groove. The upper end of the third piston plate is fixedly connected with an abutment column, and the lower end of the third piston plate is elastically connected to the inner bottom of the columnar groove through a second spring. The inner bottom space of the columnar groove is connected to a first one-way channel, and the inner bottom space of the columnar groove is connected to a corresponding connecting hole through two second one-way channels. The inner bottom space of each connecting hole is provided with a third one-way channel.

[0011] Preferably, the diameter of the third one-way channel is one-quarter of the diameter of the second one-way channel. The first one-way channel is equipped with a one-way valve for gas to enter the columnar groove in one direction. The second one-way channel is equipped with a one-way valve for gas to enter the connecting hole in one direction from the columnar groove in one direction. The third one-way channel is equipped with a one-way valve for gas to exit the connecting hole in one direction.

[0012] Preferably, it also includes a gas storage mechanism, which includes a U-shaped frame that is fixedly connected to the rear side of two vertical plates. A rotating shaft is rotatably connected to each of the two opposite side walls of the U-shaped frame. A crankshaft is fixedly connected to the opposite ends of the two rotating shafts. A piston cylinder is fixedly connected to the rear side of the support base plate. A second piston plate that can slide up and down is provided inside the piston cylinder. A connecting strip is rotatably connected to the upper end of the second piston plate. The other end of the connecting strip is rotatably connected to the crankshaft. The rotating rod and one end of one of the rotating shafts are each equipped with a synchronous pulley, and the two synchronous pulleys are connected by a synchronous belt drive.

[0013] Preferably, a gas storage cylinder is fixedly connected to the rear side of the housing, and a first piston plate that can slide up and down is provided inside the gas storage cylinder. The upper end of the first piston plate is elastically connected to the inner top of the first spring gas storage cylinder. The inner top of the gas storage cylinder is connected to the outside through a port. A one-way hole is opened in the inner bottom space of the piston cylinder, and the inner bottom space of the piston cylinder is connected to the inner bottom space of the gas storage cylinder through a one-way tube. The one-way orifice is equipped with a one-way valve that allows gas to enter the bottom of the piston cylinder in one direction, and the one-way tube is equipped with a one-way valve that allows gas to enter the gas storage cylinder in one direction from the piston cylinder.

[0014] Preferably, several vent holes are provided on the opposite sidewalls of the two hollow vertical plates, and multiple sealing gaskets that cooperate with the vent holes are fixedly connected to both sides of the mounting plate. The bottom space of the gas storage cylinder is connected to a gas discharge pipe, and the other end of the gas discharge pipe extends into the shell and is connected to the two hollow vertical plates through two branch pipes.

[0015] Preferably, a sealing door is installed on the front side of the housing, and multiple one-way exhaust holes are opened on both side walls of the housing. Each one-way exhaust hole is equipped with a one-way valve that allows gas to be discharged from the inside of the housing in one direction. The upper end of the housing has a display control panel, which is used to control the first motor, the second motor, and the adjustable electric heating plate, and can also be used to display the data of the ranging sensor.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: 1. This fuse box, with its standard snap-fit ​​structure and replaceable connector, can be adapted to different vehicle models without modifying the core structure of the box. This significantly shortens the mold and testing costs, thereby reducing the R&D cycle and production costs.

[0017] 2. This testing equipment uses an adjustable electric heating plate to accurately simulate the high-temperature environment under the hood of a car. Combined with a second motor driving a cam to rotate, it enables flexible switching between large-amplitude low-frequency and small-amplitude high-frequency vibrations. It also uses an impact column to simulate impact testing, effectively improving the accuracy and reliability of the test and providing a more realistic basis for fuse box quality assessment.

[0018] 3. After completing the high-temperature horizontal vibration test, the testing equipment begins the vibration test under the normal temperature tilted installation state. The first motor is started to change the position of the mounting plate, automatically opening the exhaust port. The gas stored in the gas storage cylinder is used to quickly expel the high-temperature gas in the shell, so that the internal temperature drops rapidly. There is no need to wait for a long time for natural cooling, which effectively shortens the test cycle, improves the testing efficiency, meets the needs of large-scale production testing, and comprehensively simulates the actual working conditions faced by the fuse box in the operation of a car. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an automotive intelligent fuse box proposed in this invention; Figure 2 This is a schematic diagram of the structure of an automotive intelligent fuse box testing device proposed in this invention; Figure 3 for Figure 2 Rear view diagram; Figure 4 for Figure 3 Partial cross-sectional schematic diagram; Figure 5 for Figure 2 A cross-sectional schematic diagram; Figure 6 This is a schematic diagram of the fixed frame and its internal structure; Figure 7 for Figure 6 Rear view diagram; Figure 8 for Figure 7 Enlarged view of point A; Figure 9 for Figure 6 A cross-sectional schematic diagram; Figure 10 for Figure 9 Enlarged view of point B; Figure 11 This is a diagram showing the interaction between the shaking plate and the two rectangular bars. Figure 12 for Figure 11 Cross-sectional view; Figure 13 for Figure 12 Enlarged view of point C; Figure 14 This is a cross-sectional view of one of the elastic expansion joints; Figure 15 for Figure 6 Schematic diagram after changing the detection status; Figure 16 for Figure 6 Top view.

[0020] In the diagram: 1 Upper cover, 2 Lower cover, 3 PCBA board, 4 Heat sink, 5 Connecting seat, 6 Dovetail strip, 7 Elastic buckle, 8 Wedge block, 9 Dovetail groove, 10 First limiting hole, 11 Housing, 12 Display control panel, 13 Sealing door, 14 Gas storage cylinder, 15 Through port, 16 First spring, 17 First piston plate, 18 First one-way pipe, 19 Gas exhaust pipe, 20 One-way exhaust hole, 21 Support base plate, 22 Sealing plate, 23 Vertical plate, 24 Top plate, 25 Guide rod, 26 Vibration plate, 27 Synchronous pulley, 28 Synchronous belt, 29 U-shaped frame, 30 Crankshaft, 31 Rotary shaft, 33 Piston cylinder, 34 Second piston plate, 35 [missing information - likely a typo, should be something like "can"]. Adjustable heating plate, 36 one-way hole, 37 connecting strip, 38 rotating rod, 39 cam, 40 rectangular strip, 41 columnar groove, 42 first one-way channel, 43 second spring, 44 third piston plate, 45 abutting rod, 46 connecting hole, 47 second one-way channel, 48 third one-way channel, 49 hollow vertical plate, 50 mounting plate, 51 sealing gasket, 52 second limit hole, 53 distance sensor, 54 first motor, 55 elastic telescopic plate, 56 L-shaped blocking strip, 57 guide plate, 58 L-shaped insert, 59 third spring, 60 second columnar groove, 61 fourth spring, 62 piston column, 63 exhaust hole, 64 second motor, 65 impact column. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] Reference Figures 1-16 A smart fuse box for automobiles includes a box assembly, which includes an upper cover 1 and a lower cover 2. The upper cover 1 and the lower cover 2 are detachably connected by screws. A PCBA board 3 is installed on the inner side of the box assembly. The PCBA board 3 integrates the overall smart module. The entire box assembly is injection molded from reinforced PA66 material, which has the characteristics of high strength, high temperature resistance, and aging resistance, and meets the working temperature requirements of the automotive industry of -40℃ to 125℃. A heat sink 4 is installed at the lower end of the lower cover 2. The heat sink 4 has a height of 8-12mm, which can quickly conduct the heat generated by the PCBA board 3 during operation to the outside. The heat dissipation power is ≥5W, ensuring that the smart module operates stably under high temperature conditions. The snap-fit ​​connection assembly includes several connecting seats 5, which can be customized according to actual needs. Each connecting seat 5 has a first limiting hole 10. Two dovetail strips 6 and elastic buckles 7 are provided on one side wall of each connecting seat 5. The side wall of the upper cover 1 is provided with dovetail grooves 9 corresponding to the dovetail strips 6 and wedge blocks 8 corresponding to the elastic buckles 7. Both the dovetail strips 6 and the dovetail grooves 9 are wider at the top and narrower at the bottom. After assembly, the elastic buckles 7 can automatically lock the wedge blocks 8 to prevent loosening during driving. The design of being wider at the top and narrower at the bottom can avoid reverse assembly and improve assembly accuracy.

[0023] In use, multiple connectors 5 can be connected to corresponding parts of the vehicle body using the first limiting hole 10. Then, the box assembly is installed at the multiple connectors 5 through the snap-fit ​​connection assembly to complete the overall installation. Compared with the existing technology, the standard snap-fit ​​structure and the design of replaceable connectors do not require modification of the core structure of the box. Only the customized connectors need to be replaced to adapt to different vehicle models, which greatly shortens the mold and testing costs, thereby reducing the R&D cycle and production costs.

[0024] This invention also discloses a testing device for an automotive smart fuse box, used to test the aforementioned fuse box. It can simulate the connection firmness of the fuse box after connection under high temperature horizontal vibration environment and normal temperature tilted vibration environment. Since high temperature environment and tilted installation state have adverse effects on vibration connection, it is impossible to intuitively determine the situation in actual use scenario without testing. Furthermore, this solution can also detect large amplitude low frequency intermittent vibration and small amplitude high frequency continuous vibration under two use scenarios. It can simulate the detection of vibration caused by the vibration of the car engine when the car suddenly encounters a bumpy road or during continuous operation. The former is prone to hard damage to the connection and detachment, while the latter is prone to detachment due to fretting wear, stress relaxation and resonance. Specifically, it includes a housing 11, which is made of high-strength metal material and has good structural stability and heat insulation performance. The housing 11 has two sealing plates 22 inside, which together with the inner wall of the housing 11 form a sealed space. A fixed frame is set in the sealed space, which includes a supporting base plate 21. Two vertical plates 23 are symmetrically fixedly connected to the upper end of the supporting base plate 21. A top plate 24 is fixedly connected to the upper end of the two vertical plates 23. An adjustable electric heating plate 35 is installed on the opposite side of the two vertical plates 23. The adjustable electric heating plate 35 consists of an electric heating plate and a temperature sensor, which can adjust the temperature inside the sealed space to the required temperature to meet the high-temperature detection environment. Specifically, in this solution, the temperature inside the sealed space can be adjusted to 80℃-90℃, which is similar to the temperature inside the space under the hood of an actual car.

[0025] The system also includes an adjustable placement mechanism, which includes a shaking plate 26 located inside the fixed frame. Two hollow vertical plates 49 are symmetrically fixedly connected to the upper end of the shaking plate 26. A distance sensor 53, which is an intelligent sensor, is installed on the upper end of the shaking plate 26. During the detection process, the distance sensor 53 can monitor whether the fuse box has shifted relative to the shaking plate 26, thereby determining whether it has become loose. A mounting plate 50 is provided between the two hollow vertical plates 49. Both ends of the mounting plate 50 are rotatably connected to the corresponding hollow vertical plate 49 via rotating shafts. A first motor 54 is installed on one side of one of the hollow vertical plates 49. The output shaft of the first motor 54 passes through the corresponding hollow vertical plate 49 and is fixedly connected to the corresponding rotating shaft. The mounting plate 50 has multiple second limiting holes 52 that cooperate with the first limiting hole 10. That is, during the specific placement operation, multiple connecting seats 5 are first installed on the mounting plate 50 with screws, and then the box assembly is installed on the connecting seats 5.

[0026] The system also includes an adjustable vibration mechanism, which employs intermittent and continuous vibration modes. Combined with an adjustable placement mechanism and an adjustable electric heating plate 35, it enables high-temperature horizontal environment vibration testing and room-temperature tilt angle vibration testing. The adjustable vibration mechanism includes a rotating rod 38 rotatably connected between two vertical plates 23. Multiple cams 39 are fixedly connected to the rotating rod 38, and each cam 39 engages with a shaking plate 26. Multiple support wheels are fixedly connected to the lower end of the shaking plate 26. The multiple support wheels and cams 39 are in contact when the second motor 64 is not running. A second motor 64 is installed on one side of one of the vertical plates 23. The output shaft of the second motor 64 passes through the corresponding vertical plate 23 and is fixedly connected to one end of the rotating rod 38. Multiple guide rods 25 are fixedly connected to opposite sides of the two vertical plates 23. These guide rods 25 all pass through the shaking plate 26 and are slidably connected. Several impact pillars 65 are fixedly connected to the lower end of the top plate 24. Two rectangular bars 40 are symmetrically fixedly connected to the upper end of the support base plate 21. The front and rear sides of the two rectangular bars 40 are provided with second columnar grooves 60. A piston column 62 is slidably connected in each second columnar groove 60. The two mating second columnar grooves 60 are connected through a connecting hole 46. The side of each piston column 62 near the corresponding connecting hole 46 is connected to the corresponding second columnar groove 60 through a fourth spring 61. An L-shaped blocking bar 56 is fixedly connected to the other side of each piston column 62. A guide plate 57 that is slidably connected to the rectangular bar 40 is fixedly connected to each L-shaped blocking bar 56. Multiple elastic telescopic plates 55 are fixedly connected to the lower end of the shaking plate 26, such as... Figure 14As shown, it consists of a fixed part and a movable part, which are slidably connected and connected by a connecting spring. In this design, the connecting spring can be a spring with a large stiffness coefficient. Each movable part of the elastic telescopic plate 55 is provided with an L-shaped insert 58. The vertical part of each L-shaped insert 58 is elastically connected to the corresponding elastic telescopic plate 55 through a third spring 59. The end of the horizontal part of each L-shaped insert 58 is inclined and cooperates with the corresponding L-shaped blocking strip 56. At the lowest position of the shaking plate 26, the upper end face of the L-shaped insert 58 is just slightly lower than the lower end face of the horizontal part of the L-shaped blocking strip 56 and is in a misaligned state (front and back misaligned). That is, when the L-shaped blocking strip 56 does not move away from the connecting hole 46, it will not contact the vertically moving L-shaped insert 58. A columnar groove 41 is provided at the upper end of the support base plate 21. A third piston plate 44 is slidably connected in the columnar groove 41. An abutment post 45 is fixedly connected to the upper end of the third piston plate 44. A roller is installed at the upper end of the abutment post 45, and the roller contacts one of the cams 39. The lower end of the third piston plate 44 is elastically connected to the inner bottom of the columnar groove 41 through a second spring 43. With the cooperation of the second spring 43, the roller will always abut against the cam 39. When the second motor 64 is started, the rotating rod 38 can drive multiple cams 39 to rotate, thereby using the abutment post 45 to make the third piston plate 44 move up and down reciprocally. The bottom space is connected to the first one-way channel 42. The inner bottom space of the columnar groove 41 is connected to the corresponding connecting hole 46 through two second one-way channels 47. The inner bottom space of each connecting hole 46 is provided with a third one-way channel 48. The diameter of the third one-way channel 48 is one-quarter of the diameter of the second one-way channel 47. A one-way valve for gas to enter the columnar groove 41 is installed inside the first one-way channel 42. A one-way valve for gas to enter the connecting hole 46 from the columnar groove 41 is installed inside the second one-way channel 47. A one-way valve for gas to exit the connecting hole 46 is installed inside the third one-way channel 48. Furthermore, during the up-and-down movement of the third piston plate 44, airflow from the outside, the cylindrical groove 41, the connecting hole 46, and the outside can be generated using a one-way valve. During the large-amplitude, low-frequency intermittent detection process, the second motor 64 rotates intermittently and at high speed. As the second motor 64 starts, it drives multiple cams 39 to rotate rapidly, causing the vibrating plate 26 to move upward quickly. When it contacts the cam 39 at its maximum radius, as the cam 39 continues to rotate, the vibrating plate 26 will continue to move upward due to inertia, with a relatively large movement, and finally move downward due to gravity. Each time the second motor 64 starts, it will quickly blow gas into the connecting hole 46 and eventually release it from the third one-way channel 48. However, because the blowing speed is relatively fast, the blown gas cannot be released quickly in the first instance (the third one-way channel 48 has a small diameter and a slow release speed, which increases the amount of gas in the connecting hole 46 during gas injection). Therefore, the amount of gas in the opposite space of the two corresponding second columnar grooves 60 will increase, pushing the two piston columns 62 to move in opposite directions, and thus causing the two corresponding L-shaped blocking strips 56 to move in opposite directions for a certain distance. In the first half of a single rotation, the third piston plate 44 moves upward and in the second half moves downward (quickly injecting gas into the connecting hole 46). Therefore, in the last half of a single rotation, the displacement of the two L-shaped blocking strips 56 is the largest. At this time, the L-shaped blocking strips 56 can interfere with the up and down movement of the L-shaped insert 58. During the downward movement of the shaking plate 26, since the L-shaped insert 58 cannot quickly and timely reset, the L-shaped insert 58 will interfere with the L-shaped blocking strip 56 during the process of the shaking plate 26 moving to the lowest position. By using the inclined plane in conjunction with the third spring 59, the L-shaped insert 58 can first move away from the L-shaped blocking strip 56 and then move closer to the L-shaped blocking strip 56. In other words, during a single rotation of the second motor 64, when the L-shaped insert 58 just moves down to its lowest point, it tends to interfere vertically with the L-shaped blocking strip 56. However, after the second motor 64 stops for a period of time, under the elastic action of the fourth spring 61, the piston rod 62 and the L-shaped insert 58 eventually reset, and the gas will eventually be released through the third one-way channel 48. After this process is completed, the second motor 64 starts again and repeats the process intermittently to perform large-amplitude low-frequency vibration tests. It should be noted that due to the design of multiple impact pillars 65, the fuse box will collide with the impact pillars 65 during the upward movement of the shaking plate 26 due to inertia, which can simulate the impact detection function. During the continuous detection process with small amplitude and low frequency, the second motor 64 performs one of the aforementioned intermittent detection processes with large amplitude and low frequency. The difference is that the second motor 64 can start continuously and continuously after the shaking plate 26 has just completely fallen down (in order to ensure the detection effect of large amplitude and low frequency, the speed of motor 64 during large amplitude and low frequency detection is greater than the speed during small amplitude and high frequency detection). Since the L-shaped insert 58 and the L-shaped blocking strip 56 have a tendency to interfere vertically after the shaking plate 26 has just completely fallen down, as the operation continues, due to the blocking effect of the L-shaped insert 58, the upward movement of the shaking plate 26 as the cam 39 rotates will cause the elastic telescopic plate 55 to be stretched and the connecting spring to be stretched. Therefore, even if the cam 39 rotates to its maximum radius and contacts the shaking plate 26, the elastic telescopic plate 55 will be stretched and the connecting spring will be stretched. As rotation continues, the vibrating plate 26 will not continue to move upward due to inertia, but will move downward due to the elastic force of the connecting spring. With continuous rotation, the vibrating plate 26 will only vibrate slightly between the maximum and minimum radii of the cam 39, achieving the effect of simulating high frequency and low amplitude. It is worth mentioning that when the second motor 64 rotates rapidly, it can make the third piston plate 44 move up and down rapidly and continuously inject air, which can ensure that the two connecting holes 46 and the corresponding second columnar groove 60 are in a high-pressure gas state (when in extremely high pressure, with continued air injection, the third one-way channel 48 will be forced to exhaust rapidly), so that the L-shaped blocking strip 56 is always in the position closest to and furthest from the connecting hole 46, and is always in a vertical interference state with the movement of the L-shaped insert 58.

[0027] The system also includes a gas storage mechanism, which includes a U-shaped frame 29 fixedly connected to the rear side of two vertical plates 23. A rotating shaft 31 is rotatably connected to each of the two opposite side walls of the U-shaped frame 29. A crankshaft 30 is fixedly connected to the opposite ends of the two rotating shafts 31. A synchronous pulley 27 is installed on the rotating rod 38 and one end of one of the rotating shafts 31. The two synchronous pulleys 27 are connected by a synchronous belt 28. A piston cylinder 33 is fixedly connected to the rear side of the support base plate 21. It is supported by heat-insulating material. A second piston plate 34 that can slide up and down is provided inside the piston cylinder 33. A connecting strip 37 is rotatably connected to the upper end of the second piston plate 34. The other end of the connecting strip 37 is rotatably connected to the crankshaft 30. Through the transmission of the synchronous pulley 27 and the synchronous belt 28, the synchronous rotation of the rotating rod 38 and the crankshaft 30 is realized. As the crankshaft 30 rotates, the second piston plate 34 is driven to move up and down in the piston cylinder 33 through the connecting strip 37. A gas storage cylinder 14 is fixedly connected to the rear side of the housing 11. The maximum gas capacity of the gas storage cylinder 14 can be designed according to requirements. In this solution, it can be ensured that during a single use, vibration testing under high temperature conditions ensures that the amount of gas injected into the gas storage cylinder 14 at the piston cylinder 33 is sufficient to expel the high-temperature gas from the housing 11 to the outside during release after the high-temperature test is completed. Ultimately, the temperature inside the housing 11 after gas replacement is approximately 30°C. The gas storage cylinder 14 is equipped with a first piston plate 17 that can slide up and down. The upper end is elastically connected to the inner top of the gas storage cylinder 14 via the first spring 16. The inner top of the gas storage cylinder 14 is connected to the outside through the port 15. A one-way hole 36 is provided in the inner bottom space of the piston cylinder 33. The one-way hole 36 can be connected to a connecting pipe to communicate with the external environment. The inner bottom space of the piston cylinder 33 is connected to the inner bottom space of the gas storage cylinder 14 through the one-way pipe 18. A one-way valve for gas to enter the inner bottom of the piston cylinder 33 is installed inside the one-way hole 36. A one-way valve for gas to enter the gas storage cylinder 14 from the piston cylinder 33 is installed inside the one-way pipe 18. Several vent holes 63 are provided on the opposite side walls of the two hollow vertical plates 49. Several sealing gaskets 51 that cooperate with the vent holes 63 are fixedly connected to both sides of the mounting plate 50. The bottom space inside the gas storage cylinder 14 is connected to a gas discharge pipe 19. The other end of the gas discharge pipe 19 extends into the inside of the housing 11 and is connected to the two hollow vertical plates 49 through two branch pipes. That is, during high temperature testing, the multiple vent holes 63 are sealed, so the bottom of the gas storage cylinder 14 cannot release gas and can only accumulate gas. After the high temperature vibration test is completed, the first motor 54 rotates, causing the position of the mounting plate 50 to change. At this time, the gas can be released through the multiple vent holes 63.

[0028] The housing 11 has a sealing door 13 installed on the front side. Multiple one-way exhaust holes 20 are provided on both side walls of the housing 11. Each one-way exhaust hole 20 is equipped with a one-way valve that allows gas to exit from the inside of the housing 11 in one direction. Multiple pipes can also be installed at the one-way exhaust holes 20 to extend to a more distant position to prevent hot air from being directly discharged and causing injury to people in the vicinity. The upper end of the housing 11 has a display control panel 12, which is used to control the first motor 54, the second motor 64 and the adjustable electric heating plate 35, and can also be used to display the data of the distance sensor 53. Operators can conveniently set test parameters and monitor the test process through the display control panel 12, which improves the convenience and controllability of the test. It should be noted that the test equipment in this scheme mainly simulates vibration test in the vertical direction. Since the vertical vibration is the most obvious, has the greatest energy and has the greatest impact on the connection firmness of the connection structure when the car is in motion.

[0029] The working principle of this testing equipment is as follows: Turn on the adjustable electric heating plate 35 to adjust the internal temperature of the sealed space to 80℃-90℃, simulating the high temperature environment under the car engine hood.

[0030] Open the sealing door 13, install multiple connecting seats 5 onto the mounting plate 50 with screws, and then install the box assembly onto the connecting seats 5 to complete the placement of the fuse box. At this time, the box assembly is in a horizontal state. Close the sealing door 13 and start the second motor 64. The second motor 64 rotates intermittently and at high speed, driving the rotating rod 38 and multiple cams 39 to rotate rapidly. The rotation of the cams 39 causes the vibrating plate 26 to move upward rapidly. When the cam 39 contacts the vibrating plate at its maximum radius, after further rotation, the vibrating plate 26 separates from the cam 39 and continues to move upward by a large amount due to inertia, and finally moves downward due to gravity.

[0031] During the rotation of the second motor 64, the third piston plate 44 moves up and down reciprocally with the rotation of the cam 39. Through the action of the first one-way channel 42, the second one-way channel 47, the third one-way channel 48, and the internal one-way valve, gas is rapidly blasted into the connecting hole 46. Because the diameter of the third one-way channel 48 is small, the gas cannot be released quickly at the first moment, which increases the amount of gas in the space on the opposite side of the two corresponding second columnar grooves 60, pushing the two piston columns 62 to move in opposite directions, and thus causing the two corresponding L-shaped blocking strips 56 to move in opposite directions a certain distance.

[0032] During the final period of a single rotation, the two L-shaped blocking bars 56 have the largest displacement, at which point they interfere with the up-and-down movement of the L-shaped insert 58. During the downward movement of the vibrating plate 26, the L-shaped insert 58 cannot quickly return to its original position and interferes with the L-shaped blocking bars 56. Using the inclined plane and the third spring 59, the L-shaped insert 58 is first moved away from the L-shaped blocking bars 56, and then moves closer to them.

[0033] After the second motor 64 stops for a period of time, under the elastic action of the fourth spring 61, the piston rod 62 and the L-shaped insert 58 finally reset, and all the gas is released through the third one-way channel 48. After this process is completed, the second motor 64 starts again and intermittently repeats the above process to perform a large-amplitude, low-frequency vibration test. At the same time, the distance sensor 53 monitors whether the fuse box is displaced relative to the vibration plate 26 to determine whether there is any loosening. During this process, due to the design of multiple impact pillars 65, as the vibration plate 26 moves upward with inertia, the fuse box will collide with the impact pillars 65 to simulate impact detection.

[0034] After the second motor 64 performs one of the above-mentioned large-amplitude, low-frequency intermittent detection processes, it starts to start continuously when the shaking plate 26 has just completely fallen.

[0035] Because the L-shaped insert 58 and the L-shaped blocking strip 56 tend to interfere vertically after the vibrating plate 26 has just completely fallen, as the second motor 64 starts continuously, the cam 39 rotates, and the upward movement of the vibrating plate 26 stretches the elastic telescopic plate 55, thus stretching the connecting spring. Even if the cam 39 continues to rotate to its maximum radius and contacts the vibrating plate 26, the vibrating plate 26 will not continue to move upward due to inertia, but will instead move downward due to the elastic force of the connecting spring.

[0036] As the second motor 64 rotates continuously, the vibrating plate 26 vibrates only slightly within the distance between the maximum and minimum radii of the cam 39, simulating high-frequency, low-amplitude vibration. Simultaneously, the rapid rotation of the second motor 64 causes the third piston plate 44 to reciprocate rapidly up and down, rapidly and continuously injecting air. This ensures that the two connecting holes 46 and the corresponding spaces on opposite sides of the second columnar groove 60 are under high-pressure gas conditions, keeping the L-shaped blocking strip 56 always in a position close to and furthest from the connecting hole 46, and always in a vertically interfering state with the movement of the L-shaped insert 58. The ranging sensor 53 continuously monitors whether the fuse box is loose. After the high-temperature test, the adjustable electric heating plate 35 is turned off. During the entire test, when the rotating rod 38 rotates, it drives the crankshaft 30 to rotate synchronously through the synchronous pulley 27 and the synchronous belt 28. The rotation of the crankshaft 30 drives the second piston plate 34 to move up and down in the piston cylinder 33 through the connecting strip 37. During vibration testing in a high-temperature environment, the one-way valve inside the one-way hole 36 and the one-way pipe 18 can generate a one-way airflow between the outside, the piston cylinder 33 and the bottom space inside the gas storage cylinder 14, so that the gas accumulates at the bottom of the gas storage cylinder 14 and causes the first piston plate 17 to move upward and compress the first spring 16. After the high-temperature vibration test is completed, the first motor 54 is started, which changes the position of the mounting plate 50 and opens multiple exhaust holes 63. The gas at the bottom of the gas storage cylinder 14 enters the two hollow vertical plates 49 through the gas discharge pipe 19 and two branch pipes, and is then released through multiple exhaust holes 63, forcing the high-temperature gas in the shell 11 to the outside, so that the internal temperature of the shell 11 is about 30°C after gas replacement, so as to carry out subsequent room temperature testing. Then the second motor 64 is started, causing it to rotate intermittently and at high speed, driving the rotating rod 38 and multiple cams 39 to rotate rapidly. The subsequent working process is the same as the process after the second motor 64 is started in the high temperature large amplitude low frequency vibration test, that is, the rotation of cam 39 causes the vibration plate 26 to generate large amplitude low frequency vibration, simulating the vibration when a car suddenly encounters a bumpy road during operation. The distance sensor 53 monitors whether the fuse box is loose.

[0037] Then, after the second motor 64 performs the above-mentioned large amplitude, low frequency intermittent test process at room temperature, when the vibration plate 26 has just completely fallen, the second motor 64 starts continuously. The subsequent working process is the same as the process after the second motor 64 starts continuously in the high temperature, small amplitude, high frequency vibration test, that is, the vibration plate 26 generates small amplitude, high frequency vibration to simulate the vibration caused by engine vibration when the car is working continuously. The distance sensor 53 monitors whether the fuse box is loose. The entire test process can be observed through the display control panel 12. Finally, after the test is completed, the sealing door 13 is opened and the workpiece is taken out.

[0038] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A smart automotive fuse box, characterized in that, include: The box assembly includes an upper cover (1) and a lower cover (2), which are detachably connected by screws. A PCBA board (3) is installed on the inner side of the box assembly, and a heat sink (4) is installed at the lower end of the lower cover (2). The snap-fit ​​connection assembly includes several connecting seats (5), each connecting seat (5) is provided with a first limiting hole (10), and each connecting seat (5) is provided with two dovetail strips (6) and elastic buckles (7) on one side wall. The side wall of the upper cover (1) is provided with dovetail grooves (9) corresponding to the dovetail strips (6), and the side wall of the upper cover (1) is provided with wedge blocks (8) corresponding to the elastic buckles (7). The dovetail strips (6) and the dovetail grooves (9) are both wider at the top and narrower at the bottom.

2. A testing device for an automotive intelligent fuse box, used to test the fuse box as described in claim 1, characterized in that, include: The housing (11) has two sealing plates (22) inside. The two sealing plates (22) and the inner wall of the housing (11) together form a sealed space. A fixed frame is provided in the sealed space. The fixed frame includes a supporting base plate (21). Two vertical plates (23) are symmetrically fixedly connected to the upper end of the supporting base plate (21). A top plate (24) is fixedly connected to the upper end of the two vertical plates (23). An adjustable electric heating plate (35) is installed on the opposite side of the two vertical plates (23). An adjustable placement mechanism is provided, comprising a shaking plate (26) disposed inside the fixed frame. Two hollow vertical plates (49) are symmetrically fixedly connected to the upper end of the shaking plate (26). A distance measuring sensor (53) is installed on the upper end of the shaking plate (26). An installation plate (50) is provided between the two hollow vertical plates (49). Both ends of the installation plate (50) are rotatably connected to the corresponding hollow vertical plate (49) through a rotating shaft. A first motor (54) is installed on one side of one of the hollow vertical plates (49). The output shaft of the first motor (54) passes through the corresponding hollow vertical plate (49) and is fixedly connected to the corresponding rotating shaft. A plurality of second limiting holes (52) that cooperate with the first limiting hole (10) are provided on the installation plate (50). The adjustable vibration mechanism adopts intermittent vibration mode and continuous vibration mode, and together with the adjustable placement mechanism and the adjustable electric heating plate (35), it can realize high temperature horizontal environment vibration test and room temperature tilt angle vibration test.

3. The testing equipment for an automotive intelligent fuse box according to claim 2, characterized in that, The adjustable vibration mechanism includes a rotating rod (38) rotatably connected between two vertical plates (23). Multiple cams (39) are fixedly connected to the rotating rod (38). The multiple cams (39) cooperate with the shaking plate (26). A second motor (64) is installed on one side of one of the vertical plates (23). The output shaft of the second motor (64) passes through the corresponding vertical plate (23) and is fixedly connected to one end of the rotating rod (38). Multiple guide rods (25) are fixedly connected to the opposite sides of the two vertical plates (23). The multiple guide rods (25) pass through the shaking plate (26) and are slidably connected. Several impact columns (65) are fixedly connected to the lower end of the top plate (24).

4. The testing equipment for an automotive intelligent fuse box according to claim 3, characterized in that, The upper end of the support base plate (21) is symmetrically fixedly connected to two rectangular bars (40). The front and rear sides of the two rectangular bars (40) are provided with second columnar grooves (60). A piston column (62) is slidably connected in each second columnar groove (60). The two matching second columnar grooves (60) are connected through a connecting hole (46). The side of each piston column (62) near the corresponding connecting hole (46) is connected to the corresponding second columnar groove (60) through a fourth spring (61). An L-shaped blocking strip (56) is fixedly connected to the other side of each piston column (62). A guide plate (57) that is slidably connected to the rectangular bar (40) is fixedly connected to each L-shaped blocking strip (56). The lower end of the shaking plate (26) is fixedly connected to a plurality of elastic telescopic plates (55). Each elastic telescopic plate (55) has an L-shaped insert (58) through its movable part. The vertical part of each L-shaped insert (58) is elastically connected to the corresponding elastic telescopic plate (55) through a third spring (59). The end of the horizontal part of each L-shaped insert (58) is inclined and cooperates with the corresponding L-shaped blocking strip (56).

5. The testing equipment for an automotive intelligent fuse box according to claim 4, characterized in that, The upper end of the support base plate (21) is provided with a columnar groove (41), and a third piston plate (44) is slidably connected in the columnar groove (41). The upper end of the third piston plate (44) is fixedly connected with an abutment column (45). The lower end of the third piston plate (44) is elastically connected to the inner bottom of the columnar groove (41) through a second spring (43). The inner bottom space of the columnar groove (41) is connected to the first one-way channel (42). The inner bottom space of the columnar groove (41) is connected to the corresponding connection hole (46) through two second one-way channels (47). The inner bottom space of each connection hole (46) is provided with a third one-way channel (48).

6. The testing equipment for an automotive intelligent fuse box according to claim 5, characterized in that, The diameter of the third one-way channel (48) is one-quarter of the diameter of the second one-way channel (47). The first one-way channel (42) is equipped with a one-way valve for gas to enter the columnar groove (41) in one direction. The second one-way channel (47) is equipped with a one-way valve for gas to enter the connecting hole (46) in one direction from the columnar groove (41). The third one-way channel (48) is equipped with a one-way valve for gas to exit from the connecting hole (46) in one direction.

7. The testing equipment for an automotive intelligent fuse box according to claim 3, characterized in that, It also includes a gas storage mechanism, which includes a U-shaped frame (29) that is fixedly connected to the rear side of two vertical plates (23). A rotating shaft (31) is rotatably connected to the two opposite side walls of the U-shaped frame (29). A crankshaft (30) is fixedly connected to the opposite ends of the two rotating shafts (31). A piston cylinder (33) is fixedly connected to the rear side of the support base plate (21). A second piston plate (34) that can slide up and down is provided inside the piston cylinder (33). A connecting strip (37) is rotatably connected to the upper end of the second piston plate (34). The other end of the connecting strip (37) is rotatably connected to the crankshaft (30). The rotating rod (38) and one of the rotating shafts (31) are each equipped with a synchronous pulley (27), and the two synchronous pulleys (27) are connected by a synchronous belt (28).

8. The testing equipment for an automotive intelligent fuse box according to claim 7, characterized in that, A gas storage cylinder (14) is fixedly connected to the rear side of the housing (11). A first piston plate (17) that can slide up and down is provided inside the gas storage cylinder (14). The upper end of the first piston plate (17) is elastically connected to the inner top of the gas storage cylinder (14) through a first spring (16). The inner top of the gas storage cylinder (14) is connected to the outside through a port (15). A one-way hole (36) is opened in the inner bottom space of the piston cylinder (33). The inner bottom space of the piston cylinder (33) is connected to the inner bottom space of the gas storage cylinder (14) through a one-way tube (18). The one-way hole (36) is equipped with a one-way valve that allows gas to enter the bottom of the piston cylinder (33) in one direction, and the one-way pipe (18) is equipped with a one-way valve that allows gas to enter the gas storage cylinder (14) in one direction from the piston cylinder (33).

9. The testing equipment for an automotive intelligent fuse box according to claim 8, characterized in that, Several vent holes (63) are provided on the opposite side walls of the two hollow vertical plates (49). Several sealing gaskets (51) that cooperate with the vent holes (63) are fixedly connected to both sides of the mounting plate (50). The bottom space of the gas storage cylinder (14) is connected to a gas discharge pipe (19). The other end of the gas discharge pipe (19) extends into the inside of the shell (11) and is connected to the two hollow vertical plates (49) through two branch pipes.

10. The testing equipment for an automotive intelligent fuse box according to claim 3, characterized in that, A sealing door (13) is installed on the front side of the housing (11). Multiple one-way exhaust holes (20) are opened on both sides of the housing (11). Each one-way exhaust hole (20) is equipped with a one-way valve that allows gas to be discharged from the inside of the housing (11) in one direction. The upper end of the housing (11) has a display control panel (12). The display control panel (12) is used to control the first motor (54), the second motor (64) and the adjustable electric heating plate (35), and can also be used to display the data of the distance sensor (53).

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