New energy automobile circuit board substrate strength detection device

Abstract

The invention belongs to the technical field of circuit board substrate detection equipment, and particularly relates to a new energy automobile circuit board substrate strength detection device which comprises a U-shaped frame, an ultrasonic flaw detector and an ultrasonic probe, and a data line interface of the ultrasonic probe is connected with the input end of the ultrasonic flaw detector. The bottom end of the U-shaped frame is fixedly connected with two supporting blocks, and the bottom end of the U-shaped frame is fixedly connected with a spring telescopic rod and a pressure sensor. The new energy automobile circuit board substrate strength detection device not only has the function of detecting the overall strength of the circuit board substrate, but also has the function of detecting the roughness of the inner wall of a circuit board screw mounting hole and the local strength of the screw mounting hole of the circuit board substrate; the comprehensiveness and accuracy of strength detection of the new energy automobile circuit board substrate can be effectively improved, the use reliability of the circuit board substrate in the new energy automobile is ensured, and the driving safety of the new energy automobile is ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit board substrate detection equipment, and in particular relates to a circuit board substrate strength detection device for new energy vehicles. Background Art

[0002] New energy vehicles refer to vehicles that use new energy as a power source. They are essentially different from traditional fuel vehicles and have advantages such as environmental protection and efficient energy utilization. Nowadays, the intelligence level of new energy vehicles continues to improve. Intelligence is reflected in many aspects such as vehicle automatic driving assistance, intelligent interactive systems, and accurate vehicle status monitoring. The development of intelligence is closely related to the progress of circuit boards, and new energy vehicle circuit boards need to undergo new energy vehicle circuit board substrate strength testing before assembling electronic components. For example, the patent application announcement number CN117517048A discloses a new energy vehicle circuit board substrate strength testing device.

[0003] At present, the strength test of the circuit board substrate of new energy vehicles mostly adopts the extrusion test method. The testing equipment squeezes the middle area of ​​the circuit board substrate, applies a standard external force to verify whether its strength is qualified, and then observes the results. However, the results of this test are not accurate enough, and the strength test of the screw mounting holes on the circuit board substrate is often ignored. Specifically, when the overall strength test of the circuit board substrate is carried out, the standard test external force applied is usually evenly applied to a larger area of ​​the circuit board substrate. At this time, the stress distribution on the circuit board substrate is relatively uniform, and there is no obvious stress concentration area, so that the circuit board substrate is not easy to crack under this test method. However, this is different from the actual use of the circuit board substrate. During the actual use of the circuit board substrate installed on the new energy vehicle, the screw mounting hole will be continuously squeezed by the local high force of the screw, and a stress concentration area will be formed around the screw mounting hole. At this time, if the inner wall of the mounting hole of the circuit board substrate is too rough, many irregular protrusions and depressions on the inner wall of the screw mounting hole will be deformed and damaged under the action of concentrated stress, and even a large number of fine cracks will be generated on the inner wall of the screw mounting hole of the circuit board substrate; In addition, the circuit board substrate with these fine cracks will further expand under the bumpy impact of driving new energy vehicles, which may cause the circuit board substrate to crack, which will not only affect the accuracy of the circuit board substrate strength test results, but also reduce the reliability of the circuit board substrate in new energy vehicles, thereby affecting the safety of new energy vehicle driving.

[0004] To this end, we propose a new energy vehicle circuit board substrate strength detection device to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a new energy vehicle circuit board substrate strength detection device in view of the above problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a new energy vehicle circuit board substrate strength detection device, comprising a U-shaped frame, an ultrasonic flaw detector and an ultrasonic probe, wherein the data line interface of the ultrasonic probe is connected to the input end of the ultrasonic flaw detector, the bottom end of the U-shaped frame is fixedly connected to two support blocks, the bottom end of the U-shaped frame is fixedly connected to a spring telescopic rod and a pressure sensor, the top end of the spring telescopic rod is fixedly connected to a connecting block, the bottom end of the connecting block contacts the pressure-receiving end of the pressure sensor, the bottom end of the ultrasonic probe is fixedly connected to the upper surface of the connecting block, and the top end of the ultrasonic probe and the upper surface of the supporting block are on the same horizontal plane; A first electric push rod is fixedly connected to the top of the U-shaped frame, and an alarm is fixedly connected to the top of the U-shaped frame; The bottom end of the first electric push rod is sleeved with a connecting ring, the connecting ring is fixedly connected to the bottom end of the first electric push rod through a bolt connector, the lower surface of the connecting ring is fixedly connected to a support plate, and the lower surface of the support plate is fixedly connected to a substrate strength detection mechanism; The four corners of the upper surface of the support plate are provided with connection holes for strength detection at the screw mounting holes of the cable plate substrate, and the hole walls of the connection holes are fixedly connected with strength detection components.

[0007] In the above-mentioned new energy vehicle circuit board substrate strength detection device, the substrate strength detection mechanism includes a hollow cylinder fixedly connected to the lower surface of the support plate, the inner wall of the hollow cylinder is movably connected with a first piston, the inner wall of the bottom end of the hollow cylinder is movably connected with a T-shaped extrusion rod, the top of the T-shaped extrusion rod is fixedly connected to the lower surface of the first piston, the top cavity of the hollow cylinder is filled with a hydraulic oil layer, the top of the hollow cylinder is fixedly connected with a connecting pipe, the upper surface of the support block is fixedly connected with a hollow cover, the inner wall of the hollow cover is movably connected with a second piston, the support block is penetrated and fixedly embedded with a second electric push rod, the top moving end of the second electric push rod is fixedly connected to the lower surface of the second piston, and the top of the connecting pipe penetrates the support plate and is located inside the hollow cover.

[0008] In the above-mentioned new energy vehicle circuit board substrate strength detection device, the lower surface of the second piston is fixedly connected to an elastic rubber sleeve, the bottom end of the elastic rubber sleeve is fixedly connected to the upper surface of the support block, and the second electric push rod is located inside the elastic rubber sleeve.

[0009] In the above-mentioned strength detection device for a new energy vehicle circuit board substrate, the strength detection component includes a hard metal tube fixedly embedded in a support plate, the top end of the hard metal tube is fixedly connected to the upper surface of a hollow block, the bottom end of the hard metal tube is fixedly connected to an insulating block, the bottom end of the insulating block is fixedly connected to a power-on block, a vent is provided on the outer wall of the bottom end of the hard metal tube, a hole wall roughness detection film sleeve is fixedly sleeved on the outer wall of the hard metal tube, the bottom end of the hole wall roughness detection rubber sleeve is fixedly connected to the upper surface of the insulating block, the tube wall of the hard metal tube is fixedly sleeved with an externally threaded sleeve, the outer wall of the externally threaded sleeve is threadedly sleeved with an extrusion cylinder, and the upper surface of the extrusion cylinder is fixedly connected with a driving mechanism.

[0010] In the above-mentioned new energy vehicle circuit board substrate strength detection device, the driving mechanism includes an internal gear cylinder fixedly connected to the upper surface of the extrusion cylinder, the top of the support plate is fixedly connected to the driving motor, the output end of the driving motor is fixedly connected to the connecting rod, the bottom end of the connecting rod is fixedly sleeved with a gear that matches the inner wall of the internal gear cylinder, and the upper surfaces of the two support blocks are each provided with a rectangular deep groove, and the groove walls of the rectangular deep groove are fixedly connected with two conductive blocks that match the power-on blocks.

[0011] In the above-mentioned new energy vehicle circuit board substrate strength detection device, the top of the U-shaped frame is fixedly connected to a PLC controller and a start switch, and the output end of the ultrasonic flaw detector is electrically connected to the input end of the PLC controller through a data line.

[0012] In the above-mentioned new energy vehicle circuit board substrate strength detection device, a retaining ring is fixedly sleeved on the outer wall of the external threaded sleeve, and a limiting ring for preventing the gear from disengaging is fixedly connected to the top end of the internal gear cylinder.

[0013] In the above-mentioned new energy vehicle circuit board substrate strength detection device, the outer walls of the two support blocks facing each other are provided with limiting side plates, and the bottom ends of the limiting side plates are fixedly connected to the bottom outer wall of the U-shaped frame.

[0014] Compared with the existing technology, the advantages of a new energy vehicle circuit board substrate strength detection device are: By setting up the substrate strength detection mechanism, the first electric push rod and the pressure sensor, when the new energy vehicle circuit board substrate needs to be tested for strength, first the circuit board substrate to be tested is placed on two supporting blocks, then the first electric push rod is started by the start switch, and the first electric push rod performs the overall strength detection of the circuit board substrate through the substrate strength detection mechanism. During the detection process, the ultrasonic flaw detector and the ultrasonic probe are used to understand in real time whether the circuit board substrate is cracked or damaged. If a crack damage alarm is sent, an alarm is sent in time to remind the staff that the strength of the circuit board substrate is unqualified. This mechanism enables the new energy vehicle circuit board substrate strength detection device to have the function of overall strength detection of the circuit board substrate.

[0015] Through the strength detection component that is set, when the circuit board substrate passes the strength detection by the substrate strength detection mechanism, the hole wall roughness detection film sleeve is inserted into the screw mounting hole of the circuit board substrate through the first electric push rod and the substrate strength detection mechanism, and the hole wall roughness detection film sleeve can be inflated. If the inner wall of the screw mounting hole is rough, a large number of irregular protrusions in the screw mounting hole will squeeze the bulged hole wall roughness detection film sleeve, and the hole wall roughness detection film sleeve changes from an insulating state to a conductive state after being squeezed, and the greater the squeezing force, the smaller the resistance of the hole wall roughness detection film sleeve, and the stronger the conductivity, thereby ensuring the accuracy of the roughness detection of the inner wall of the screw mounting hole of the circuit board substrate. The mechanism enables the strength detection device of the circuit board substrate of the new energy vehicle to have the function of detecting the roughness of the inner wall of the circuit board screw mounting hole, and can effectively improve the comprehensiveness and accuracy of the strength detection of the circuit board substrate of the new energy vehicle.

[0016] Through the arranged driving mechanism, when the local strength detection of the screw mounting hole of the circuit board substrate whose inner wall of the screw mounting hole is smooth and has no hidden danger of strength damage is carried out, the extrusion cylinder is rotated and extruded by the driving mechanism to extrude the circuit board substrate, and the state of the circuit board substrate being fixed by the screw can be simulated. When the circuit board substrate is subjected to the rotational extrusion of the extrusion cylinder at the screw mounting hole, the ultrasonic flaw detector and the ultrasonic probe still perform real-time detection of the circuit board substrate. At this time, if the circuit board substrate has crack damage, the alarm is controlled to sound, otherwise the alarm does not sound. The strength detection device for the circuit board substrate of the new energy vehicle has the function of local strength detection of the screw mounting hole of the circuit board substrate, further improving the comprehensiveness and accuracy of the strength detection of the circuit board substrate of the new energy vehicle, and ensuring the reliability of the circuit board substrate used in the new energy vehicle, as well as ensuring the driving safety of the new energy vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a new energy vehicle circuit board substrate strength detection device provided by the present invention; Figure 2It is a structural schematic diagram of a substrate strength detection mechanism in a substrate strength detection device for a circuit board of a new energy vehicle provided by the present invention; Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of the medium-intensity detection component; Figure 4 yes Figure 3 Schematic diagram of the structure of the inflated bulging film sleeve for detecting the roughness of the pore wall; Figure 5 It is a structural schematic diagram of a support block part in a new energy vehicle circuit board substrate strength detection device provided by the present invention; Figure 6 It is a three-dimensional structural schematic diagram of an internal gear cylinder in a new energy vehicle circuit board substrate strength detection device provided by the present invention; Figure 7 It is a three-dimensional structural schematic diagram of a gear part in a new energy vehicle circuit board substrate strength detection device provided by the present invention.

[0018] In the figure: 1 U-shaped frame, 2 ultrasonic flaw detector, 3 ultrasonic probe, 4 support block, 5 spring telescopic rod, 6 substrate strength detection mechanism, 61 hollow cylinder, 62 first piston, 63 T-shaped extrusion rod, 64 hydraulic oil layer, 65 connecting pipe, 66 hollow cover, 67 second piston, 68 second electric push rod, 7 strength detection component, 71 hard metal tube, 72 insulating block, 73 vent, 74 hole wall roughness detection film sleeve, 75 external thread sleeve, 76 extrusion cylinder, 77 power block, 8 driving mechanism, 81 internal gear cylinder, 82 driving motor, 83 connecting rod, 84 gear, 85 rectangular deep groove, 86 conductive block, 9 PLC controller, 10 connecting block, 11 first electric push rod, 12 alarm, 13 connecting ring, 14 support plate, 15 pressure sensor, 16 elastic rubber sleeve, 17 starting switch, 18 retaining ring, 19 limit ring, 20 limit side plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1-Figure 7As shown, a strength detection device for a circuit board substrate of a new energy vehicle comprises a U-shaped frame 1, an ultrasonic flaw detector 2 and an ultrasonic probe 3. The data line interface of the ultrasonic probe 3 is connected to the input end of the ultrasonic flaw detector 2. The bottom end of the U-shaped frame 1 is fixedly connected to two support blocks 4. The outer walls of the two support blocks 4 facing away from each other are both provided with limiting side plates 20. The bottom end of the limiting side plates 20 is fixedly connected to the outer wall of the bottom end of the U-shaped frame 1. Due to the limiting effect of the limiting side plates 20 and the three sides of the U-shaped frame 1, the circuit board substrate can be accurately placed to the strength In the degree detection position, the bottom end of the U-shaped frame 1 is fixedly connected with a spring telescopic rod 5 and a pressure sensor 15, the top end of the spring telescopic rod 5 is fixedly connected with a connecting block 10, the bottom end of the connecting block 10 contacts the pressure-bearing end of the pressure sensor 15, the bottom end of the ultrasonic probe 3 is fixedly connected with the upper surface of the connecting block 10, the top end of the ultrasonic probe 3 and the upper surface of the support block 4 are on the same horizontal plane, the top end of the U-shaped frame 1 is fixedly connected with a first electric push rod 11, and the top end of the U-shaped frame 1 is fixedly connected with an alarm 12.

[0021] The bottom end of the first electric push rod 11 is sleeved with a connecting ring 13, and the connecting ring 13 is fixedly connected to the bottom end of the first electric push rod 11 through a bolt connector, and the lower surface of the connecting ring 13 is fixedly connected to a support plate 14, and the lower surface of the support plate 14 is fixedly connected to a substrate strength detection mechanism 6, and the substrate strength detection mechanism 6 includes a hollow cylinder 61 fixedly connected to the lower surface of the support plate 14, and the inner wall of the hollow cylinder 61 is movably connected to a first piston 62, and the inner wall of the bottom end of the hollow cylinder 61 is movably connected to a T-shaped extrusion rod 63, and the top of the T-shaped extrusion rod 63 is fixedly connected to the lower surface of the first piston 62, and the top cavity of the hollow cylinder 61 is filled with a hydraulic oil layer 64, and the top of the hollow cylinder 61 is fixedly connected to a connecting pipe 65, and the upper surface of the support block 4 is fixed It is connected with a hollow cover 66, and the inner wall of the hollow cover 66 is movably connected with a second piston 67. A second electric push rod 68 is fixedly embedded in the support block 4. The top moving end of the second electric push rod 68 is fixedly connected to the lower surface of the second piston 67. The top end of the connecting pipe 65 passes through the support plate 14 and is located inside the hollow cover 66. An elastic rubber sleeve 16 is fixedly connected to the lower surface of the second piston 67. The bottom end of the elastic rubber sleeve 16 is fixedly connected to the upper surface of the support block 4. The second electric push rod 68 is located inside the elastic rubber sleeve 16. The elastic rubber sleeve 16 can prevent the hydraulic pressure of the hydraulic oil layer 64 from interfering with the second electric push rod 68. This mechanism enables the new energy vehicle circuit board substrate strength detection device to have the function of overall circuit board substrate strength detection.

[0022] The four corners of the upper surface of the support plate 14 are provided with connection holes for strength detection of the screw mounting holes of the cable board substrate, and the hole wall of the connection hole is fixedly connected with a strength detection component 7, the strength detection component 7 includes a hard metal tube 71 fixedly embedded with the support plate 14, the top of the hard metal tube 71 is fixedly connected to the upper surface of the hollow block, the bottom end of the hard metal tube 71 is fixedly connected to an insulating block 72, the bottom end of the insulating block 72 is fixedly connected to a power-on block 77, a vent 73 is provided on the outer wall of the bottom end of the hard metal tube 71, the outer wall of the hard metal tube 71 is fixedly sleeved with a hole wall roughness detection film sleeve 74, the bottom end of the hole wall roughness detection rubber sleeve is fixedly connected to the upper surface of the insulating block 72, the tube wall of the hard metal tube 71 is fixedly sleeved with an external threaded sleeve 75, the outer wall of the external threaded sleeve 75 is threadedly sleeved with an extrusion cylinder 76, the upper surface of the extrusion cylinder 76 is fixedly connected with a driving mechanism 8, the driving mechanism 8 includes an internal gear cylinder 81 fixedly connected to the upper surface of the extrusion cylinder 76, the top of the support plate 14 is fixedly connected with a driving mechanism 8. Motor 82, the output end of the driving motor 82 is fixedly connected with a connecting rod 83, the bottom end of the connecting rod 83 is fixedly sleeved with a gear 84 that matches the inner wall of the inner gear cylinder 81, the upper surfaces of the two support blocks 4 are provided with rectangular deep grooves 85, and the groove walls of the rectangular deep grooves 85 are fixedly connected with two conductive blocks 86 that match the power-on blocks 77, the outer wall of the external threaded sleeve 75 is fixedly sleeved with a retaining ring 18, and the top of the inner gear cylinder 81 is fixedly connected with a limit ring 19 for preventing the gear 84 from disengaging, the retaining ring 18 can prevent the extrusion cylinder 76 from excessively moving upward, and the limit ring 19 can prevent the gear 84 from separating from the inner gear cylinder 81. This mechanism enables the new energy vehicle circuit board substrate strength detection device to have the functions of detecting the inner wall roughness of the circuit board screw mounting hole and the local strength of the circuit board substrate screw mounting hole, which can effectively improve the comprehensiveness and accuracy of the strength detection of the new energy vehicle circuit board substrate, and ensure the reliability of the circuit board substrate in the use of new energy vehicles, as well as the safety of driving new energy vehicles.

[0023] The top of the U-shaped frame 1 is fixedly connected with a PLC controller 9 and a start switch 17. The output end of the ultrasonic flaw detector 2 is electrically connected to the input end of the PLC controller 9 through a data line. The hole wall roughness detection film sleeve 74, the pressure sensor 15, the start switch 17, and the conductive block 86 are all electrically connected to the input end of the PLC controller 9 through wires. The power-on block 77 and the two conductive blocks 86 are a conductive branch for inputting the PLC controller 9, and the power-on block 77 and the two conductive blocks 86 are also electrically connected to the drive motor 82 in the same position drive mechanism 8. The material of the hole wall roughness detection film sleeve 74 is pressure-sensitive conductive rubber. The pressure-sensitive conductive rubber is in an insulating state when not under stress. The resistance of the pressure-sensitive conductive rubber is significantly reduced after being squeezed, and the resistance of the pressure-sensitive conductive rubber decreases as the force squeeze increases. The alarm 12, the first electric push rod 11, and the second electric push rod 68 are all electrically connected to the output end of the PLC controller 9 through wires. The above-mentioned electrical connection box power-on equipment are all prior art and are well known to those skilled in the art, and will not be repeated here.

[0024] The operating principle of the present invention is now described as follows: when the circuit board substrate of a new energy vehicle needs to be tested for strength, first, the support plate 14 that matches the specifications of the circuit board to be tested is installed in place through the connecting ring 13 and the bolt connector, so as to ensure that the positions of the substrate strength detection mechanism 6, the hole wall roughness detection film sleeve 74 and the driving mechanism 8 on the support plate 14 can match the area where the circuit board substrate to be tested needs to be tested for strength, and the circuit board substrate to be tested is placed on the two support blocks 4, and due to the three-side limiting effect of the limiting side plate 20 and the U-shaped frame 1, the circuit board substrate can be accurately placed in the strength detection position, and then the staff presses the starting switch 17, the starting switch 17 connects the circuit of the input end of the PLC controller 9, and transmits a starting electrical signal to the PLC controller 9, and the PLC controller 9 starts the first electrical signal according to the starting electrical signal. The first electric push rod 11 is moved, while the second electric push rod 68 continues to maintain the contracted state. The first electric push rod 11 applies a squeeze force to the middle area of ​​the circuit board substrate through the hollow cylinder 61, the first piston 62 and the T-shaped squeeze rod 63 to test its structural strength. The circuit board substrate will undergo elastic deformation as the squeeze force increases, and the elastic deformation acts on the spring telescopic rod 5 and the pressure sensor 15 through the ultrasonic probe 3 and the connecting block 10. The pressure sensor 15 is squeezed by the elastic deformation to generate a pressure electrical signal that is transmitted to the PLC controller 9. If the pressure value detected by the pressure sensor 15 reaches the squeeze force threshold value corresponding to the qualified strength of the circuit board substrate preset by the PLC controller 9, the PLC controller 9 promptly controls the first electric push rod 11 to retract its moving end, and then stops applying squeeze force to the circuit board substrate to avoid damage to the circuit board substrate caused by excessive squeeze force. At the same time, during the circuit board substrate strength detection process, the ultrasonic flaw detector 2 cooperates with the ultrasonic probe 3 to detect in real time whether the circuit board substrate is cracked or damaged. The ultrasonic flaw detector 2 generates an electrical signal to excite the ultrasonic probe 3, and the ultrasonic probe 3 converts the electrical signal into an ultrasonic wave and transmits it. When the ultrasonic wave encounters a crack defect in the circuit board substrate, a reflected echo will be generated. The ultrasonic probe 3 receives the reflected echo and converts the reflected echo into an electrical signal and transmits it to the ultrasonic flaw detector 2 for analysis and processing, thereby realizing flaw detection. If the ultrasonic flaw detector 2 and the ultrasonic probe 3 detect crack damage, the ultrasonic flaw detector 2 promptly sends a circuit board substrate crack damage signal to the PLC controller 9, and then the PLC controller 9 controls the alarm 12 to alarm, reminding the staff that the circuit board substrate strength is unqualified. On the contrary, during the circuit board substrate detection process, the ultrasonic flaw detector 2 and the ultrasonic probe 3 do not find that the circuit board substrate is cracked or damaged, and the PLC controller 9 does not control the alarm 12 to alarm. Then, after the circuit board substrate passes the strength test by the substrate strength detection mechanism 6 and passes the test of the strength detection component 7, the PLC controller 9 not only controls the moving end of the first electric push rod 11 to move downward, but also controls the second electric push rod 68 to push the second piston 67 to move upward. After the second piston 67 moves upward, the negative pressure environment at the bottom of the hollow cover 66 draws the hydraulic oil layer 64 in the hollow cylinder 61 through the connecting pipe 65. After the hydraulic oil layer 64 is drawn, the first piston 62 drives the T-shaped extrusion rod 63 to move upward accordingly, so as to avoid the interference caused by the contact between the T-shaped extrusion rod 63 and the circuit board substrate. When the first electric push rod 11 pushes the support plate 14 to move downward, the support plate 14 is pushed downward by the first electric push rod 11. The support plate 14 drives the bottom of the hard metal tube 71 to be inserted into the screw mounting hole of the circuit board substrate, and finally makes the power block 77 at the bottom of the hard metal tube 71 contact with the two conductive blocks 86. After the conductive block 86 is connected, it sends an electrical signal to the PLC controller 9. The PLC controller 9 controls the moving end of the first electric push rod 11 to continue to move downward according to the electrical signal. Moreover, after the conductive block 86 is connected, it can also control the drive motor 82 at the same position as the strength detection component 7 to start. At the same time, when the second electric push rod 68 pushes the second piston 67 to move upward, the air in the hollow cover 66 is pushed into the hard metal tube 71 by the second piston 67, and then the hard metal tube 71 The internal air passes through the vent hole 73 to make the hole wall roughness detection film sleeve 74 bulge. The outer diameter of the bulged hole wall roughness detection film sleeve 74 is consistent with the inner diameter of the cable board substrate screw mounting hole. At this time, if the screw mounting hole is too rough, a large number of irregular protrusions in the screw mounting hole will squeeze the bulged hole wall roughness detection film sleeve 74. Since the material of the hole wall roughness detection film sleeve 74 is pressure-sensitive conductive rubber, the pressure-sensitive conductive rubber is in an insulating state when it is not stressed. After being squeezed, the resistance of the pressure-sensitive conductive rubber is significantly reduced, and as the force is squeezed greater, the resistance of the pressure-sensitive conductive rubber is smaller. The bulged hole wall roughness detection film sleeve 74 has conductive ability after being squeezed, and An electrical signal is sent to the PLC controller 9 through the hole wall roughness detection film sleeve 74, and the PLC controller 9 controls the alarm 12 to sound an alarm according to the electrical signal. After the alarm 12 sounds an alarm, it reminds the staff that there is a hidden danger of unqualified strength at the screw mounting hole of the circuit board substrate. Specifically, when the circuit board substrate is fixed and installed by screws, many irregular protrusions and depressions on the inner wall of the screw mounting hole will form concentrated stress under the extrusion force of the screws. These concentrated stresses will cause fine cracks in the hole wall. The circuit board substrate with these fine cracks will be further enlarged under the bumpy impact of driving a new energy vehicle, which will endanger the reliable use of the circuit board substrate; On the contrary, if the inner wall of the screw installation hole is smooth, the alarm 12 will not sound, and then the extruded cylinder 76 will perform a local area strength test. When the conductive block 86 is energized, the drive motor 82 will be started. The drive motor 82 drives the connecting rod 83 to rotate, and the connecting rod 83 drives the inner gear cylinder 81 to rotate through the gear 84. During the rotation of the inner gear cylinder 81, the gear 84 can still be reliably engaged. The inner gear cylinder 81 also drives the extrusion cylinder 76 to rotate along the external threaded sleeve 75. Due to the thread restriction of the external threaded sleeve 75, the extrusion cylinder 76 is squeezed downward while rotating, and can simulate the state of the screw fixing the circuit board substrate. When the screw mounting hole is subjected to the rotational extrusion of the extrusion cylinder 76, the ultrasonic flaw detector 2 and the ultrasonic probe 3 still perform real-time detection on the circuit board substrate. If the ultrasonic flaw detector 2 and the ultrasonic probe 3 detect cracking damage, the ultrasonic flaw detector 2 promptly sends a circuit board substrate cracking damage signal to the PLC controller 9, and then the PLC controller 9 controls the alarm 12 to alarm, reminding the staff that the circuit board substrate strength is unqualified. If the ultrasonic flaw detector 2 and the ultrasonic probe 3 do not find cracking damage on the circuit board substrate, the PLC controller 9 does not control the alarm 12 to alarm. In summary, the new energy vehicle circuit board substrate strength detection device not only has the function of detecting the overall strength of the circuit board substrate, but also has the function of detecting the roughness of the inner wall of the circuit board screw mounting hole and the local strength of the circuit board substrate screw mounting hole. It can effectively improve the comprehensiveness and accuracy of the strength detection of the new energy vehicle circuit board substrate, and ensure the reliability of the circuit board substrate used in new energy vehicles, as well as the safety of driving new energy vehicles.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new energy vehicle circuit board substrate strength detection device, comprising a U-shaped frame (1), an ultrasonic flaw detector (2) and an ultrasonic probe (3), wherein a data line interface of the ultrasonic probe (3) is connected to an input end of the ultrasonic flaw detector (2), characterized in that: The bottom end of the U-shaped frame (1) is fixedly connected to two support blocks (4), the bottom end of the U-shaped frame (1) is fixedly connected to a spring telescopic rod (5) and a pressure sensor (15), the top end of the spring telescopic rod (5) is fixedly connected to a connecting block (10), the bottom end of the connecting block (10) is in contact with the pressure-bearing end of the pressure sensor (15), the bottom end of the ultrasonic probe (3) is fixedly connected to the upper surface of the connecting block (10), and the top end of the ultrasonic probe (3) and the upper surface of the support block (4) are on the same horizontal plane; A first electric push rod (11) is fixedly connected to the top of the U-shaped frame (1), and an alarm (12) is fixedly connected to the top of the U-shaped frame (1); The bottom end of the first electric push rod (11) is sleeved with a connecting ring (13), the connecting ring (13) is fixedly connected to the bottom end of the first electric push rod (11) via a bolt connection, the lower surface of the connecting ring (13) is fixedly connected to a support plate (14), and the lower surface of the support plate (14) is fixedly connected to a substrate strength detection mechanism (6); The four corners of the upper surface of the support plate (14) are provided with connection holes for strength detection at the screw mounting holes of the cable plate substrate, and the hole walls of the connection holes are fixedly connected with strength detection components (7).

2. A new energy vehicle circuit board substrate strength detection device according to claim 1, characterized in that: The substrate strength detection mechanism (6) comprises a hollow cylinder (61) fixedly connected to the lower surface of the support plate (14); the inner wall of the hollow cylinder (61) is movably connected to a first piston (62); the inner wall of the bottom end of the hollow cylinder (61) is movably connected to a T-shaped extrusion rod (63); the top end of the T-shaped extrusion rod (63) is fixedly connected to the lower surface of the first piston (62); the top cavity of the hollow cylinder (61) is filled with a hydraulic oil layer (64); the top end of the hollow cylinder (61) is fixedly connected to a connecting pipe (65); the upper surface of the support block (4) is fixedly connected to a hollow cover (66); the inner wall of the hollow cover (66) is movably connected to a second piston (67); a second electric push rod (68) is fixedly embedded in the support block (4); the top movable end of the second electric push rod (68) is fixedly connected to the lower surface of the second piston (67); the top end of the connecting pipe (65) passes through the support plate (14) and is located inside the hollow cover (66).

3. A new energy vehicle circuit board substrate strength detection device according to claim 2, characterized in that: The lower surface of the second piston (67) is fixedly connected to an elastic rubber sleeve (16), the bottom end of the elastic rubber sleeve (16) is fixedly connected to the upper surface of the support block (4), and the second electric push rod (68) is located inside the elastic rubber sleeve (16).

4. A new energy vehicle circuit board substrate strength detection device according to claim 2, characterized in that: The strength detection assembly (7) comprises a hard metal tube (71) fixedly embedded in the support plate (14); the top end of the hard metal tube (71) is fixedly connected to the upper surface of the hollow block; the bottom end of the hard metal tube (71) is fixedly connected to an insulating block (72); the bottom end of the insulating block (72) is fixedly connected to a power supply block (77); a vent hole (73) is provided on the outer wall of the bottom end of the hard metal tube (71); a hole wall roughness detection film sleeve (74) is fixedly sleeved on the outer wall of the hard metal tube (71); the bottom end of the hole wall roughness detection rubber sleeve is fixedly connected to the upper surface of the insulating block (72); the tube wall of the hard metal tube (71) is fixedly sleeved with an external threaded sleeve (75); the outer wall of the external threaded sleeve (75) is threadedly sleeved with an extrusion cylinder (76); the upper surface of the extrusion cylinder (76) is fixedly connected to a driving mechanism (8).

5. A new energy vehicle circuit board substrate strength detection device according to claim 4, characterized in that: The driving mechanism (8) comprises an inner gear cylinder (81) fixedly connected to the upper surface of the extrusion cylinder (76); the top end of the support plate (14) is fixedly connected to a driving motor (82); the output end of the driving motor (82) is fixedly connected to a connecting rod (83); the bottom end of the connecting rod (83) is fixedly sleeved with a gear (84) that matches the inner wall of the inner gear cylinder (81); the upper surfaces of the two support blocks (4) are each provided with a rectangular deep groove (85); and the groove wall of the rectangular deep groove (85) is fixedly connected to two conductive blocks (86) that match the power supply block (77).

6. A new energy vehicle circuit board substrate strength detection device according to claim 1, characterized in that: A PLC controller (9) and a start switch (17) are fixedly connected to the top of the U-shaped frame (1), and an output end of the ultrasonic flaw detector (2) is electrically connected to an input end of the PLC controller (9) via a data line.

7. A new energy vehicle circuit board substrate strength detection device according to claim 5, characterized in that: A retaining ring (18) is fixedly sleeved on the outer wall of the external threaded sleeve (75), and a limiting ring (19) for preventing the gear (84) from disengaging is fixedly connected to the top end of the internal gear cylinder (81).

8. A new energy vehicle circuit board substrate strength detection device according to claim 1, characterized in that: The outer walls of the two support blocks (4) facing away from each other are each provided with a limiting side plate (20), and the bottom end of the limiting side plate (20) is fixedly connected to the outer wall of the bottom end of the U-shaped frame (1).

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