A detection device for an automotive lamp

Abstract

The application discloses a kind of detection equipment for automobile lamps, it is related to automobile lamps detection technical field, including bottom plate, the top of the bottom plate is provided with air-tightness detection mechanism, and the top of bottom plate is provided with fixed mechanism;Air-tightness detection mechanism can make lamp sealed and carry out air-tightness detection using positive pressure and negative pressure mode, this detection equipment for automobile lamps, by setting air-tightness detection mechanism, electric push rod can be driven to drive sealing cover lifting, cooperate detection frame to form closed detection space, cooperate air pressure detection controller to monitor the change of cavity air pressure in real time, realize the full automation control of detection process, both ensure the airtightness of sealed cavity, can also accurately capture air pressure fluctuation signal, improve detection efficiency and stability, simultaneously servo motor drives switching block to rotate in adjusting cylinder, through bending air hole, the communication state of positive pressure injection pipe and tee pipe air pipe and negative pressure suction pipe and tee pipe air pipe can be flexibly switched.

Description

Technical Field

[0001] This invention relates to the field of automotive lighting testing technology, specifically to a testing device for automotive lighting. Background Technology

[0002] Automotive lighting inspection refers to the process of checking the performance and safety of various lights in an automotive lighting system, such as headlights, taillights, brake lights, and turn signals. Its main purpose is to ensure that the lights can work normally under different conditions, providing sufficient brightness and visibility, thereby ensuring driving safety. Air tightness testing of automotive lights is one of the important links in the automotive lighting production process. Air tightness testing is a key step in ensuring the quality of automotive lights, verifying their ability to resist the intrusion of external gases, moisture, dust, and other media, thereby ensuring that the lights maintain a good working environment and appearance quality during long-term use.

[0003] Existing automotive lighting testing equipment typically assesses airtightness by injecting gas and observing pressure changes. However, this single positive pressure injection method is insufficient for accurately testing different types and conditions of lighting fixtures. Automotive lighting fixtures use seals made of different materials and with varying structures, and these seals exhibit different sealing characteristics under positive and negative pressure environments. Furthermore, the location, form, and degree of leakage also differ. A single testing method is prone to missed or false detections. Additionally, the significant differences in the shape of the lighting fixtures present challenges in securing them during testing, leading to displacement or shaking, which affects the accuracy and stability of the test results.

[0004] Combining the above issues, we find that existing automotive lighting testing equipment struggles to simultaneously address these problems. Even when these problems are solved, they often require external tools, thus failing to achieve the desired results. Therefore, we propose a new testing device for automotive lighting. Summary of the Invention

[0005] The purpose of this invention is to provide a testing device for automotive lighting fixtures to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a testing device for automotive lamps, comprising a base plate, an airtightness testing mechanism disposed above the base plate, and a fixing mechanism disposed above the base plate; The airtightness testing mechanism enables the lamp to be sealed and then tested for airtightness using both positive and negative pressure methods. The fixing mechanism can effectively fix the lamps being tested.

[0007] Preferably, the airtightness testing mechanism includes a fixed frame, the bottom surface of which is fixedly connected to the upper surface of the base plate. Two electric push rods are fixedly connected to the inner top wall of the fixed frame, and the telescopic ends of the two electric push rods are jointly fixedly connected to a sealing cover. A testing frame is fixedly connected to the upper surface of the base plate, and a pressure detection controller is fixedly connected to the outer surface of the testing frame. The detection end of the pressure detection controller passes through the testing frame and extends into the interior of the testing frame. A duct is fixedly connected to the left side of the testing frame. A support frame is fixedly connected to the bottom surface of the base plate. A three-way pipe is fixedly connected to the bottom end of the duct. A first solenoid valve is fixedly connected to the output end of the three-way pipe. An adjusting cylinder is fixedly connected to the input end of the three-way pipe. The bottom surface of the adjusting cylinder is fixedly connected to the inner bottom wall of the support frame. A positive pressure injection pipe and a negative pressure suction pipe are fixedly connected to the outer surface of the adjusting cylinder, respectively. A switching block is rotatably connected to the inner wall of the adjusting cylinder, and a curved vent hole is fixedly connected to the outer surface of the switching block.

[0008] Preferably, the input end of the positive pressure air injection pipe is fixedly connected to an air compressor, and the output end of the negative pressure air intake pipe is fixedly connected to a vacuum pump. The bottom surface of the vacuum pump and the bottom surface of the air compressor are both fixedly connected to the inner bottom wall of the support frame.

[0009] Preferably, a servo motor is fixedly connected to the top of the switching block, and an indicator rod is fixedly connected to the outer surface of the switching block.

[0010] Preferably, the fixing mechanism includes two fixing boxes. The outer surface of each fixing box is fixedly connected to the inner wall of the detection frame. The two fixing boxes are fixedly connected to a multi-port pipe on their opposite sides. The end of the multi-port pipe away from the detection frame is fixedly connected to the output end of the three-way pipe. The inner wall of each fixing box is fixedly connected to fixing cylinders arranged at equal intervals. The inner wall of each fixing cylinder is slidably connected to a piston block. The side of each set of piston blocks that is close to each other is fixedly connected to a clamping rod. The outer surface of each clamping rod is slidably connected to the inner wall of the fixing cylinder. The end of each set of clamping rods that is close to each other is fixedly connected to a flexible clamp.

[0011] Preferably, a pressure relief pipe is fixedly connected to the outer surface of the multi-port pipe, and a second solenoid valve is fixedly connected to the outer surface of the pressure relief pipe.

[0012] Preferably, the bottom surface of the base plate is fixedly connected to four support legs, and the bottom surface of each support leg is fixedly connected to a base.

[0013] Preferably, a display screen is fixedly mounted on the outer surface of the air pressure detection controller, and the display screen is electrically connected to the air pressure detection controller via wires.

[0014] Preferably, a stabilizing block is fixedly connected to the outer surface of the servo motor, and the bottom surface of the stabilizing block is fixedly connected to the upper surface of the adjusting cylinder.

[0015] Preferably, a support block is fixedly connected to one end of the multi-port pipe near the tee pipe, and the bottom surface of the support block is fixedly connected to the inner bottom wall of the support frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up an airtightness detection mechanism, can use an electric push rod to drive the sealing cover to rise and fall, forming a sealed detection space with the detection frame. Combined with a pressure detection controller, it monitors the air pressure changes within the cavity in real time, achieving fully automated control of the detection process. This ensures the airtightness of the sealed cavity while accurately capturing pressure fluctuation signals, improving detection efficiency and stability. Simultaneously, a servo motor drives a switching block to rotate within the adjusting cylinder. Through a curved vent hole, the connection status of the positive pressure injection pipe and the three-way air guide pipe, as well as the negative pressure suction pipe and the three-way air guide pipe, can be flexibly switched. When the curved vent hole rotates 60 degrees, the switching block... When the bent vent is connected to the positive pressure air injection pipe, the compressed air generated by the air compressor enters the detection frame through the regulating cylinder, tee pipe, and air guide pipe to achieve airtightness detection under positive pressure environment. When the bent vent is rotated 180 degrees to switch to connection with the negative pressure air intake pipe, the vacuum pump evacuates the detection frame through the negative pressure air intake pipe, regulating cylinder, tee pipe, and air guide pipe to form a negative pressure detection environment. The indicator rod rotates synchronously with the switching block, which can intuitively display the current pipeline connection status. This effectively solves the problem of easy missed detection and false detection by a single detection method, and improves the detection accuracy of seals of different materials and structures and different leakage conditions.

[0017] 2. This invention, through the setting of a fixing mechanism, can achieve automated clamping and fixing of lamps. With the cooperation of the first solenoid valve, the first solenoid valve connected to the multi-way pipe is opened, and the first solenoid valve at the air guide pipe is closed. The compressed air generated by the air compressor will be diverted to the multi-way pipe through the three-way pipe, and then enter the two fixing boxes. The air pressure in the fixing boxes increases, pushing the piston block in the fixing cylinder to move closer to the lamp. The piston block drives the clamping rod to extend out of the fixing cylinder, thereby making the flexible clamp contact with the outer surface of the lamp and applying clamping force. Due to the setting of multiple fixing cylinders and flexible clamps arranged at equal distances, the lamp can be evenly clamped from multiple directions, ensuring that the lamp will not shift or shake during the testing process. The flexible clamp is made of soft material with a certain degree of elasticity, which can ensure the stability of clamping and avoid causing indentations or damage to the lamp surface. It is suitable for fixing automotive lamps of different shapes and sizes. The clamping force can be adjusted by controlling the air pressure. The operation is convenient and the fixing effect is reliable, effectively solving the problem of difficult fixing of lamps of different shapes, and ensuring the accuracy and stability of the test results. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the base plate of the present invention; Figure 3 This is a schematic diagram of the structure of the multi-port pipe of the present invention; Figure 4 This is a schematic diagram of the structure of the regulating cylinder of the present invention; Figure 5 This is a cross-sectional structural schematic diagram of the adjusting cylinder of the present invention; Figure 6 This is a cross-sectional structural schematic diagram of the fixing box of the present invention; Figure 7 This is a schematic diagram of the structure of the switching block of the present invention after rotating 60 degrees clockwise; Figure 8 This is a schematic diagram of the structure of the switching block of the present invention after rotating 0.80 degrees clockwise.

[0019] In the picture: 1. Base plate; 2. Air tightness testing mechanism; 201. Fixing frame; 202. Air pressure detection controller; 203. Electric push rod; 204. Sealing cover; 205. Detection frame; 206. Support frame; 207. Air guide pipe; 208. T-connector; 209. Adjusting cylinder; 210. Positive pressure air injection pipe; 211. Negative pressure air intake pipe; 212. Air compressor; 213. Vacuum pump; 214. Servo motor; 215. First solenoid valve; 216. Switching block; 217. Bent vent hole; 218. Identification rod; 3. Fixing mechanism; 301. Fixing box; 302. Multi-way pipe; 303. Pressure relief pipe; 304. Second solenoid valve; 305. Fixing cylinder; 306. Piston block; 307. Clamping rod; 308. Flexible clamp; 4. Support leg; 5. Base; 6. Display screen; 7. Support block; 8. Stabilizing block. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-8 The present invention provides a technical solution: a testing device for automotive lamps, including a base plate 1, an airtightness testing mechanism 2 disposed above the base plate 1, and a fixing mechanism 3 disposed above the base plate 1; The airtightness testing unit 2 can perform airtightness testing on the lamps after they are sealed, using both positive and negative pressure methods.

[0022] As a further definition of the airtightness testing mechanism 2 of the present invention, the airtightness testing mechanism 2 includes a fixed frame 201, the bottom surface of the fixed frame 201 is fixedly connected to the upper surface of the base plate 1, two electric push rods 203 are fixedly connected to the inner top wall of the fixed frame 201, the telescopic ends of the two electric push rods 203 are jointly fixedly connected to a sealing cover 204, a testing frame 205 is fixedly connected to the upper surface of the base plate 1, a pressure detection controller 202 is fixedly connected to the outer surface of the testing frame 205, the detection end of the pressure detection controller 202 penetrates through the testing frame 205 and extends into the interior of the testing frame 205, and the left side of the testing frame 205... A duct 207 is fixedly connected to the bottom of the base plate 1, and a support frame 206 is fixedly connected to the bottom of the duct 207. A three-way pipe 208 is fixedly connected to the bottom of the duct 207. A first solenoid valve 215 is fixedly connected to the output end of the three-way pipe 208. An adjusting cylinder 209 is fixedly connected to the input end of the three-way pipe 208. The bottom of the adjusting cylinder 209 is fixedly connected to the inner bottom wall of the support frame 206. A positive pressure air injection pipe 210 and a negative pressure air intake pipe 211 are fixedly connected to the outer surface of the adjusting cylinder 209, respectively. A switching block 216 is rotatably connected to the inner wall of the adjusting cylinder 209. A curved air vent 217 is fixedly connected to the outer surface of the switching block 216.

[0023] Please see Figure 4 The input end of the positive pressure injection pipe 210 is fixedly connected to an air compressor 212, and the output end of the negative pressure suction pipe 211 is fixedly connected to a vacuum pump 213. The bottom surface of the vacuum pump 213 and the bottom surface of the air compressor 212 are both fixedly connected to the inner bottom wall of the support frame 206. The air compressor 212 and the vacuum pump 213 provide power sources for positive pressure detection and negative pressure detection, respectively. The air compressor 212 can generate stable compressed air, which is delivered to the regulating cylinder 209 through the positive pressure injection pipe 210 to provide the required air pressure for positive pressure detection. The vacuum pump 213 can evacuate air from the inside of the detection frame 205 through the negative pressure suction pipe 211 to form a stable negative pressure environment. The two work together to ensure the effective switching and stable operation of positive and negative pressure detection modes.

[0024] Please see Figure 4 and Figure 5A servo motor 214 is fixedly connected to the top of the switching block 216, and an indicator rod 218 is fixedly connected to the outer surface of the switching block 216. The servo motor 214 can precisely drive the switching block 216 to rotate inside the adjusting cylinder 209. By controlling the rotation angle of the servo motor 214, the curved vent 217 can be precisely connected to the positive pressure air injection pipe 210 or the negative pressure air intake pipe 211, ensuring the accuracy and reliability of the air path switching. The indicator rod 218 rotates synchronously with the switching block 216, and its direction can intuitively reflect the current connection status of the curved vent 217. For example, when the indicator rod 218 points to the positive pressure air injection pipe 210, it indicates that it is currently in the positive pressure detection mode. When the indicator rod 218 points to the tee pipe 208, it is in the negative pressure detection mode, which makes it convenient for operators to monitor the operation of the equipment in real time.

[0025] Please see Figure 1 Four support legs 4 are fixedly connected to the bottom surface of the base plate 1. Each support leg 4 is fixedly connected to a base 5. The four support legs 4 are respectively located at the four corners of the bottom surface of the base plate 1, which provides stable support for the entire equipment and ensures that the equipment will not shake or tip over during operation. The base 5 is made of rubber material, which not only increases the friction with the ground and further improves the stability of the equipment, but also effectively absorbs the vibration generated during the operation of the equipment.

[0026] Please see Figure 1 A display screen 6 is fixedly installed on the outer surface of the air pressure detection controller 202. The display screen 6 is electrically connected to the air pressure detection controller 202 through wires. The display screen 6 can display key data such as the air pressure value inside the detection frame 205 detected by the air pressure detection controller 202, the air pressure change curve, and the detection time in real time. The operator can intuitively understand the air pressure dynamics during the detection process by observing the display screen 6, which makes it easy to judge the airtightness of the lamp in a timely manner.

[0027] Please see Figure 4 A stabilizing block 8 is fixedly connected to the outer surface of the servo motor 214. The bottom surface of the stabilizing block 8 is fixedly connected to the upper surface of the regulating cylinder 209. The stabilizing block 8 can provide stable support for the servo motor 214, effectively preventing the servo motor 214 from shaking during high-speed rotation or start-stop, ensuring the smoothness and accuracy of the rotation of the switching block 216, avoiding deviations in air circuit switching due to motor shaking, thereby ensuring the stability of air pressure regulation and the accuracy of detection results.

[0028] The specific implementation method of this embodiment is as follows: First, connect the air pressure detection controller 202, electric push rod 203, air compressor 212, vacuum pump 213, servo motor 214, and first solenoid valve 215 to an external power supply, and connect the electric push rod 203, air compressor 212, vacuum pump 213, servo motor 214, and first solenoid valve 215 to the air pressure detection controller 202 for easy control. Next, place the automotive lamp to be tested in the center of the detection frame 205 and fix it. Then, issue a command through the air pressure detection controller 202 to control the opening. The electric push rod 203 is activated, and its telescopic end extends, causing the sealing cover 204 to move downwards until it tightly seals the top opening of the detection frame 205, forming a sealed detection chamber. Next, an airtightness test is performed, starting with a positive pressure test: the air pressure detection controller 202 controls the servo motor 214 to start, driving the switching block 216 to rotate 60 degrees clockwise. This can be confirmed by the direction indicated by the indicator rod 218, connecting the bent vent hole 217 on the switching block 216 to the input end of the positive pressure injection pipe 210 and the three-way pipe 208. Figure 7 Observe and simultaneously open the first solenoid valve 215 at the air guide pipe 207. Compressed air generated by the air compressor 212 enters the regulating cylinder 209 through the positive pressure air injection pipe 210, and then enters the detection frame 205 through the bent air vent 217, the three-way pipe 208, and the air guide pipe 207, causing the air pressure inside the detection frame 205 to gradually increase to the preset positive pressure detection value. When the air pressure reaches the specified value, the servo motor 214 and the switching block 216 are reset, and the passage of the switching block 216 is switched to achieve the effect of sealing and maintaining pressure. The air pressure detection control... The controller 202 monitors the air pressure changes within the detection frame 205 in real time via its detection end and displays the data on the display screen 6. If the air pressure remains stable within the set pressure holding time and does not show a significant drop, it indicates that the lamp has good airtightness under positive pressure conditions. If the air pressure drops beyond the allowable range, it is determined that a leak exists. After the positive pressure test is completed, a negative pressure test is performed. The air pressure detection controller 202 again controls the servo motor 214 to work, driving the switching block 216 to rotate 180 degrees clockwise. Figure 8Observe and connect the curved vent 217 to the input end of the negative pressure suction pipe 211 and the three-way pipe 208. At the same time, ensure that the first solenoid valve 215 at the air guide pipe 207 is in the open state. Start the vacuum pump 213. The vacuum pump 213 extracts air from the regulating cylinder 209, the three-way pipe 208 and the air guide pipe 207 through the negative pressure suction pipe 211, thereby creating a negative pressure environment inside the detection frame 205. When the air pressure detection controller 202 detects that the air pressure inside the detection frame 205 reaches the preset negative pressure detection value, it controls the servo motor 214 and the switching block 216 to reset and cut off the air path to achieve sealing and pressure maintenance. The air pressure detection controller 202 continues to monitor the changes in air pressure inside the cavity in real time. If the negative pressure value remains stable within the set pressure maintenance time and there is no obvious rebound, it indicates that the lamp is airtight under negative pressure conditions. If the negative pressure value rebounds beyond the allowable range, it is determined that there is a leak.

[0029] Example 2: Please refer to Figure 2 , Figure 3 and Figure 6 The present invention provides a technical solution: a testing device for automotive lamps. The present invention makes corresponding improvements to the technical problems mentioned in the background art, and the fixing mechanism 3 can effectively fix the lamps to be tested.

[0030] As a further definition of the fixing mechanism 3 of the present invention, the fixing mechanism 3 includes two fixing boxes 301. The outer surface of each fixing box 301 is fixedly connected to the inner wall of the detection frame 205. The two fixing boxes 301 are fixedly connected to a multi-port pipe 302 on their respective sides away from each other. The end of the multi-port pipe 302 away from the detection frame 205 is fixedly connected to the output end of the three-way pipe 208. The inner wall of each fixing box 301 is fixedly connected to fixing cylinders 305 arranged at equal intervals. The inner wall of each fixing cylinder 305 is slidably connected to a piston block 306. The side of each set of piston blocks 306 that is close to each other is fixedly connected to a clamping rod 307. The outer surface of each clamping rod 307 is slidably connected to the inner wall of the fixing cylinder 305. The end of each set of clamping rods 307 that is close to each other is fixedly connected to a flexible clamp 308.

[0031] Please see Figure 3 The outer surface of the multi-port pipe 302 is fixedly connected to a pressure relief pipe 303, and the outer surface of the pressure relief pipe 303 is fixedly connected to a second solenoid valve 304. When it is necessary to release the fixing of the lamp, the second solenoid valve 304 is opened, and the compressed air in the fixing box 301 and the multi-port pipe 302 can be quickly discharged through the pressure relief pipe 303, the air pressure in the fixing cylinder 305 is reduced, and the clamping state is released.

[0032] Please see Figure 3A support block 7 is fixedly connected to one end of the multi-port pipe 302 near the tee pipe 208. The bottom surface of the support block 7 is fixedly connected to the inner bottom wall of the support frame 206. The support block 7 provides stable support for the multi-port pipe 302, preventing the multi-port pipe 302 from bending or shifting due to its own weight or air pressure impact, ensuring that compressed air can be stably and smoothly delivered from the tee pipe 208 to the fixed box 301, and ensuring the normal operation of the fixed mechanism 3.

[0033] The specific implementation method of this embodiment is as follows: First, the second solenoid valve 304 is connected to an external power supply and connected to the air pressure detection controller 202 to achieve control. After the car lamp to be tested is placed in the center of the detection frame 205, the air pressure detection controller 202 issues a command to open the first solenoid valve 215 connected to the multi-way pipe 302. The air pressure detection controller 202 then controls the servo motor 214 to start, driving the switching block 216 to rotate 60 degrees clockwise, which can be confirmed by the direction of the indicator rod 218. The curved vent 217 on the switching block 216 is connected to the input end of the positive pressure air injection pipe 210 and the three-way pipe 208. Compressed air enters the multi-way pipe 302 through the positive pressure air injection pipe 210, the regulating cylinder 209, and one of the output ends of the three-way pipe 208 (this output end is connected to the multi-way pipe 302). The multi-way pipe 302 divides the compressed air into the two fixed boxes 301. After the high-pressure gas enters the fixed box 301, it pushes the piston block 306 in each fixed cylinder 305 to move towards the lamp. The piston block 306 drives the clamping rod 307 to extend. As the fixed cylinder 305 extends, the flexible clamp 308 at the end of the clamping rod 307 moves closer to the outer surface of the lamp. With the gradual increase in air pressure, the flexible clamp 308 contacts the outer surface of the lamp and applies clamping force. Because multiple equally spaced fixed cylinders 305 and flexible clamps 308 are arranged, the lamp can be evenly clamped from multiple directions, ensuring that the lamp will not shift or shake during testing. The flexible clamp 308 is made of a soft and elastic material, ensuring both clamping stability and preventing indentations or damage to the lamp surface. Used for fixing automotive lamps of different shapes and sizes, the clamping force can be adjusted by controlling the air pressure. It is easy to operate and the fixing effect is reliable. It effectively solves the problem of fixing lamps of different shapes and ensures the accuracy and stability of the test results. When the air tightness test is completed and the lamp needs to be removed, the second solenoid valve 304 on the pressure relief pipe 303 is opened. The compressed air in the fixing box 301 and the multi-port pipe 302 is quickly discharged through the pressure relief pipe 303, releasing the clamp on the lamp. At this time, the operator can easily take out the tested lamp.

[0034] Example 3: Specifically, when this testing equipment for automotive lighting is in operation / use: In use, the air pressure detection controller 202, electric actuator 203, air compressor 212, second solenoid valve 304, vacuum pump 213, servo motor 214, and first solenoid valve 215 are connected to an external power supply. The electric actuator 203, second solenoid valve 304, air compressor 212, vacuum pump 213, servo motor 214, and first solenoid valve 215 are also connected to the air pressure detection controller 202 for easy control. Next, the automotive lamp to be tested is placed in the center of the detection frame 205. The air pressure detection controller 202 issues a command to open the first solenoid valve 215, which is connected to the multi-port pipe 302. The air pressure detection controller 202 then... The servo motor 214 is started, driving the switching block 216 to rotate 60 degrees clockwise. This can be confirmed by the direction indicated by the indicator rod 218, connecting the curved vent hole 217 on the switching block 216 to the input end of the positive pressure air injection pipe 210 and the three-way pipe 208. Compressed air enters the multi-way pipe 302 through the positive pressure air injection pipe 210, the regulating cylinder 209, and one of the output ends of the three-way pipe 208 (this output end is connected to the multi-way pipe 302). The multi-way pipe 302 diverts the compressed air to the two fixed boxes 301. After the high-pressure gas enters the fixed box 301, it pushes the piston block 306 in each fixed cylinder 305 to move closer to the lamp. The piston block 306 drives the clamping rod 307 to extend. As the fixed cylinder 305 extends, the flexible clamp 308 at the end of the clamping rod 307 moves closer to the outer surface of the lamp. With the gradual increase in air pressure, the flexible clamp 308 contacts the outer surface of the lamp and applies clamping force. Because multiple equally spaced fixed cylinders 305 and flexible clamps 308 are arranged, the lamp can be evenly clamped from multiple directions, ensuring that the lamp will not shift or shake during testing. The flexible clamp 308 is made of soft and elastic material, ensuring both clamping stability and preventing indentations or damage to the lamp surface. It is suitable for fixing automotive lamps of different shapes and sizes. The clamping force can be adjusted by controlling the air pressure, making operation convenient and providing a good fixing effect. Reliable and effective solution to the problem of fixing lamps of different shapes, ensuring the accuracy and stability of test results. After clamping, the first solenoid valve 215 at the multi-way pipe 302 is closed to maintain pressure. Then, the air pressure detection controller 202 sends a command to control the opening of the electric push rod 203. The telescopic end of the electric push rod 203 extends, driving the sealing cover 204 to move downward until the sealing cover 204 tightly covers the top opening of the detection frame 205, forming a sealed detection chamber. Next, the air tightness test is performed. First, the positive pressure test is performed: the bent vent hole 217 on the switching block 216 is connected to the positive pressure injection pipe 210 and the input end of the three-way pipe 208. Figure 7Observe and simultaneously open the first solenoid valve 215 at the air guide pipe 207. Compressed air generated by the air compressor 212 enters the regulating cylinder 209 through the positive pressure air injection pipe 210, and then enters the detection frame 205 through the bent air vent 217, the three-way pipe 208, and the air guide pipe 207, causing the air pressure inside the detection frame 205 to gradually increase to the preset positive pressure detection value. When the air pressure reaches the specified value, the servo motor 214 and the switching block 216 are reset, and the passage of the switching block 216 is switched to achieve the effect of sealing and maintaining pressure. The air pressure detection control... The controller 202 monitors the air pressure changes within the detection frame 205 in real time via its detection end and displays the data on the display screen 6. If the air pressure remains stable within the set pressure holding time and does not show a significant drop, it indicates that the lamp has good airtightness under positive pressure conditions. If the air pressure drops beyond the allowable range, it is determined that a leak exists. After the positive pressure test is completed, a negative pressure test is performed. The air pressure detection controller 202 again controls the servo motor 214 to work, driving the switching block 216 to rotate 180 degrees clockwise. Figure 8 Observe and connect the curved vent 217 to the input end of the negative pressure suction pipe 211 and the three-way pipe 208. At the same time, ensure that the first solenoid valve 215 at the air guide pipe 207 is in the open state. Start the vacuum pump 213. The vacuum pump 213 draws air from the regulating cylinder 209, the three-way pipe 208 and the air guide pipe 207 through the negative pressure suction pipe 211, thereby creating a negative pressure environment inside the detection frame 205. When the air pressure detection controller 202 detects that the air pressure inside the detection frame 205 reaches the preset negative pressure detection value, it controls the servo motor 214 and the switching block 216 to reset and cut off the air path. To achieve a sealed and pressure-maintaining system, the air pressure detection controller 202 continues to monitor the changes in air pressure inside the cavity in real time. If the negative pressure value remains stable within the set pressure-maintaining time and there is no significant rebound, it indicates that the lamp is airtight under negative pressure conditions. If the negative pressure value rebounds beyond the allowable range, it is determined that there is a leak. When the airtightness test is completed and the lamp needs to be removed, the second solenoid valve 304 on the pressure relief pipe 303 is opened. The compressed air in the fixed box 301 and the multi-way pipe 302 is quickly discharged through the pressure relief pipe 303, releasing the clamp on the lamp. At this time, the operator can easily remove the tested lamp.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing device for automotive lighting fixtures, comprising a base plate (1), characterized in that: An airtightness testing mechanism (2) is provided above the base plate (1), and a fixing mechanism (3) is provided above the base plate (1). The airtightness testing mechanism (2) can perform airtightness testing on the lamp after it is sealed, using positive and negative pressure methods; The fixing mechanism (3) can effectively fix the lamps being tested.

2. The testing equipment for automotive lamps according to claim 1, characterized in that: The airtightness testing mechanism (2) includes a fixed frame (201), the bottom surface of which is fixedly connected to the upper surface of the base plate (1). Two electric push rods (203) are fixedly connected to the inner top wall of the fixed frame (201). The telescopic ends of the two electric push rods (203) are fixedly connected to a sealing cover (204). A testing frame (205) is fixedly connected to the upper surface of the base plate (1). A pressure testing controller (202) is fixedly connected to the outer surface of the testing frame (205). The testing end of the pressure testing controller (202) passes through the testing frame (205) and extends into the interior of the testing frame (205). A duct (207) is fixedly connected to the left side of the testing frame (205). The bottom surface of the base plate (1) is fixedly connected to a support frame (206), the bottom end of the air guide pipe (207) is fixedly connected to a three-way pipe (208), the output end of the three-way pipe (208) is fixedly connected to a first solenoid valve (215), the input end of the three-way pipe (208) is fixedly connected to an adjusting cylinder (209), the bottom surface of the adjusting cylinder (209) is fixedly connected to the inner bottom wall of the support frame (206), the outer surface of the adjusting cylinder (209) is fixedly connected to a positive pressure air injection pipe (210) and a negative pressure air intake pipe (211), the inner wall of the adjusting cylinder (209) is rotatably connected to a switching block (216), and the outer surface of the switching block (216) is fixedly connected to a curved air vent (217).

3. The testing equipment for automotive lamps according to claim 2, characterized in that: The positive pressure air injection pipe (210) is fixedly connected to an air compressor (212) at its input end, and the negative pressure air intake pipe (211) is fixedly connected to a vacuum pump (213) at its output end. The bottom surface of the vacuum pump (213) and the bottom surface of the air compressor (212) are both fixedly connected to the inner bottom wall of the support frame (206).

4. The testing equipment for automotive lamps according to claim 2, characterized in that: A servo motor (214) is fixedly connected to the top of the switching block (216), and an indicator rod (218) is fixedly connected to the outer surface of the switching block (216).

5. A testing device for automotive lighting fixtures according to claim 2, characterized in that: The fixing mechanism (3) includes two fixing boxes (301). The outer surface of each fixing box (301) is fixedly connected to the inner wall of the detection frame (205). The two fixing boxes (301) are fixedly connected to a multi-port pipe (302) on their opposite sides. The end of the multi-port pipe (302) away from the detection frame (205) is fixedly connected to the output end of a three-way pipe (208). The inner wall of each fixing box (301) is fixedly connected to a fixing cylinder (305) arranged at equal intervals. The inner wall of each fixing cylinder (305) is slidably connected to a piston block (306). The side of each set of piston blocks (306) that is close to each other is fixedly connected to a clamping rod (307). The outer surface of each clamping rod (307) is slidably connected to the inner wall of the fixing cylinder (305). The end of each set of clamping rods (307) that is close to each other is fixedly connected to a flexible clamp (308).

6. The testing equipment for automotive lamps according to claim 5, characterized in that: The outer surface of the multi-port pipe (302) is fixedly connected to a pressure relief pipe (303), and the outer surface of the pressure relief pipe (303) is fixedly connected to a second solenoid valve (304).

7. The testing equipment for automotive lamps according to claim 1, characterized in that: The bottom surface of the base plate (1) is fixedly connected to four support legs (4), and the bottom surface of each support leg (4) is fixedly connected to a base (5).

8. A testing device for automotive lighting fixtures according to claim 2, characterized in that: The outer surface of the air pressure detection controller (202) is fixedly equipped with a display screen (6), and the display screen (6) is electrically connected to the air pressure detection controller (202) through wires.

9. A testing device for automotive lighting fixtures according to claim 4, characterized in that: A stabilizing block (8) is fixedly connected to the outer surface of the servo motor (214), and the bottom surface of the stabilizing block (8) is fixedly connected to the upper surface of the adjusting cylinder (209).

10. A testing device for automotive lighting fixtures according to claim 5, characterized in that: The multi-port pipe (302) is fixedly connected to a support block (7) at one end near the three-port pipe (208), and the bottom surface of the support block (7) is fixedly connected to the inner bottom wall of the support frame (206).

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