Sealing performance detection device for automobile headlight

Abstract

The utility model relates to a sealing detection device for an automobile headlamp, which belongs to the field of automobile headlamp detection and comprises a detection box body, a pressure sensor fixedly communicated with the inside of the detection box body and extending to the outside of the detection box body, a stand column fixedly connected to the top of the detection box body and a mounting plate fixedly connected to the top end of the stand column. A limiting mechanism for limiting and fixing the headlamp is arranged on the upper surface of the detection box body, and a negative pressure generation structure is arranged outside the detection box body. According to the sealing performance detection device of the automobile headlamp, the output end of the electric push rod drives the partition plate to move downwards in the detection box body to limit and fix the headlamp, the partition plate is connected with the linkage structure through the fixing rod and the rack, so that the piston plate is driven to reciprocate through the rotating disc and the connecting rod, and a negative pressure environment is formed in the detection box body; the risk of damage to the internal structure and the sealing material of the headlamp due to overlarge internal pressure is fundamentally eliminated, and the advantage of nondestructive testing is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive headlight testing technology, specifically to a device for testing the sealing performance of automotive headlights. Background Technology

[0002] As a crucial lighting component of a car, the sealing performance of headlights directly affects their lifespan and illumination effect. Poor sealing allows external moisture, dust, and other impurities to enter the headlight, leading to problems such as reflector corrosion, bulb damage, and short circuits, seriously compromising driving safety.

[0003] The sealing performance of automotive headlights is crucial to their lifespan and safety. Current headlight sealing tests primarily employ positive pressure testing, which involves filling the headlight with gas at a certain pressure and judging the sealing performance by monitoring pressure changes. However, during inflation, the internal pressure of the headlight gradually increases, potentially causing damage to delicate components such as reflectors, bulbs, and circuit boards, thus reducing the headlight's lifespan. Furthermore, different models and specifications of automotive headlights have varying shapes, and existing testing devices struggle to adapt well to these shapes, impacting testing efficiency and accuracy. Therefore, this paper proposes a new headlight sealing testing device to address the aforementioned problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a sealing performance testing device for automotive headlights. It has the advantages of non-destructive testing and high testing efficiency. It solves the problem that in existing automotive headlight sealing performance testing devices, the internal pressure of the headlight gradually increases during the inflation process, which may cause compression damage to precision components such as reflectors, bulbs, and circuit boards inside the headlight, reducing the lifespan of the headlight. In addition, the different shapes of automotive headlights of different models and specifications affect the testing efficiency and accuracy.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing performance testing device for automotive headlights, comprising a testing housing, a pressure sensor fixedly connected to the interior of the testing housing and extending to its exterior, a column fixedly connected to the top of the testing housing, and a mounting plate fixedly connected to the top of the column. The upper surface of the testing housing is provided with a limiting mechanism for limiting and fixing the headlight, and the exterior of the testing housing is provided with a negative pressure generating structure.

[0006] The limiting mechanism includes an electric push rod fixedly installed on the top of the mounting plate, a partition plate fixedly connected to the output end of the electric push rod, an elastic telescopic rod fixedly installed at the bottom of the partition plate, and a clamping plate fixedly connected to the bottom end of the elastic telescopic rod.

[0007] The negative pressure generating structure includes a piston cylinder fixedly connected to the outside of the detection chamber, a piston plate slidably connected to the inside of the piston cylinder, a stopper rod fixedly connected to the outside of the piston plate, a connecting rod hinged to the right end of the stopper rod, and a linkage structure disposed outside the connecting rod.

[0008] Furthermore, abutment springs are fixedly installed between the partition and the clamping plate. The abutment springs are connected around the outside of the elastic telescopic rod. There are four sets of abutment springs and elastic telescopic rods, which are distributed in a rectangular shape between the partition and the clamping plate.

[0009] Furthermore, the partition is slidably connected to the inside of the detection chamber, and a sealing rubber strip is fixedly connected to the outside of the partition. The outer diameter of the partition is adapted to the inner diameter of the detection chamber.

[0010] Furthermore, the linkage structure includes a fixed rod fixedly connected to the top of the partition, a rack fixedly connected to the bottom of the fixed rod, a connecting plate fixedly connected to the outside of the detection box, a rotating shaft rotatably connected to the inside of the connecting plate, and a gear and a turntable fixedly installed on the outside of the rotating shaft.

[0011] Furthermore, the rack and gear mesh with each other, the connecting rod is rotatably connected to the outside of the turntable via a pin, and a limiting seat adapted to the fixed rod is fixedly connected to the outside of the detection box, and the fixed rod is slidably connected to the inside of the limiting seat.

[0012] Furthermore, an air extraction pipe is fixedly connected between the piston cylinder and the detection box, and a one-way valve is fixedly installed inside the air extraction pipe. An exhaust pipe is fixedly connected to the left side of the piston cylinder, and the piston rod is slidably connected to the inside of the piston cylinder and extends to its outside via a connecting rod.

[0013] Furthermore, the front of the testing chamber is hinged with a sealing cover, and tempered glass is inlaid inside the sealing cover. The bottom of the testing chamber is fixedly connected with four support legs.

[0014] Compared with the prior art, this utility model provides a sealing performance testing device for automotive headlights, which has the following advantages:

[0015] 1. This automotive headlight sealing test device uses an electric push rod to move a partition downwards within the test chamber, allowing the clamping plate to limit and fix the headlight from different directions without damaging the headlight surface. It can automatically adapt to headlights of different shapes. The partition is connected to a linkage structure via a fixing rod and rack, which in turn drives a piston plate to reciprocate through a turntable and connecting rod. This creates a negative pressure environment inside the test chamber, avoiding the need for pressurizing the headlight during positive pressure testing. This fundamentally eliminates the risk of damage to the headlight's internal structure and sealing materials due to excessive internal pressure, extends the headlight's lifespan, ensures the safety of the testing process, and achieves the advantages of non-destructive testing.

[0016] 2. The sealing detection device for automotive headlights uses a linkage structure to convert the linear motion of the partition into the reciprocating motion of the piston plate, thereby automatically drawing air to form a negative pressure environment. This eliminates the need for additional power to drive the piston cylinder, simplifying the device structure and reducing costs. At the same time, the one-way valve ensures the unidirectionality of air drawing, improving air drawing efficiency and enabling the rapid formation of a stable negative pressure environment, which is beneficial for improving detection efficiency and achieving the advantage of high detection efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional cross-sectional view of the structure of this utility model;

[0018] Figure 2 This is a three-dimensional cross-sectional view of the limiting mechanism and negative pressure generating structure of this utility model.

[0019] Figure 3 This is a three-dimensional cross-sectional view of the negative pressure generating structure of this utility model;

[0020] Figure 4 This utility model Figure 2 A magnified structural diagram of structure A is shown.

[0021] In the diagram: 1. Detection chamber; 2. Pressure sensor; 3. Column; 4. Mounting plate; 5. Electric push rod; 6. Partition plate; 7. Elastic telescopic rod; 8. Clamping plate; 9. Abutment spring; 10. Piston cylinder; 11. Piston plate; 12. Plug rod; 13. Connecting rod; 14. Suction pipe; 15. Exhaust pipe; 16. Fixing rod; 17. Rack; 18. Connecting plate; 19. Rotating shaft; 20. Gear; 21. Turntable; 22. Limit seat; 23. Sealing cover. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figures 1 to 4 This embodiment discloses a headlight sealing test device, comprising a test chamber 1, a pressure sensor 2 fixedly connected to the interior of the test chamber 1 and extending to its exterior, a column 3 fixedly connected to the top of the test chamber 1, and a mounting plate 4 fixedly connected to the top of the column 3. The upper surface of the test chamber 1 is provided with a limiting mechanism for limiting and fixing the headlight, and the exterior of the test chamber 1 is provided with a negative pressure generating structure. The pressure sensor 2 monitors the pressure changes inside the test chamber 1 in real time and transmits the data to a matching controller. If the pressure change value inside the test chamber 1 is within the allowable range within a specified time, the headlight is determined to be well sealed; if the pressure change value exceeds a set threshold, the headlight is determined to be poorly sealed.

[0024] The limiting mechanism includes an electric push rod 5 fixedly installed on the top of the mounting plate 4, a partition 6 fixedly connected to the output end of the electric push rod 5, an elastic telescopic rod 7 fixedly installed at the bottom of the partition 6, and a clamping plate 8 fixedly connected to the bottom end of the elastic telescopic rod 7.

[0025] Specifically, abutment springs 9 are fixedly installed between partition 6 and clamping plate 8. These springs 9 are connected to the outside of elastic telescopic rods 7. There are four sets of both abutment springs 9 and elastic telescopic rods 7, arranged in a rectangular pattern between partition 6 and clamping plate 8. Partition 6 is slidably connected to the inside of the detection chamber 1, and a sealing rubber strip is fixedly connected to the outside of partition 6. The outer diameter of partition 6 matches the inner diameter of the detection chamber 1. The electric push rod 5 is activated by the controller, and its output end drives partition 6 to move downwards within the detection chamber 1. During the movement of partition 6, the sealing rubber strip tightly adheres to the inner wall of the detection chamber 1, ensuring smooth sliding and good sealing to prevent gas leakage from affecting the detection results. As partition 6 moves downwards, it causes the four sets of elastic telescopic rods 7 and clamping plate 8 at its bottom to descend together. When clamping plate 8 contacts the headlight surface, the elastic telescopic rods 7 begin to retract, and the abutment springs 9 are compressed. The abutment spring 9 is connected to the outside of the elastic telescopic rod 7. The four sets of abutment springs 9 and elastic telescopic rod 7 are distributed in a rectangular shape between the partition plate 6 and the clamping plate 8. They can apply pressure evenly, so that the clamping plate 8 can limit and fix the headlight from different directions without damaging the surface of the headlight. At the same time, it can automatically adapt to headlights of different shapes.

[0026] It should be noted that a sealing cover 23 is hinged to the front of the testing chamber 1, and tempered glass is embedded inside the sealing cover 23. Four support legs are fixedly connected to the bottom of the testing chamber 1. The tempered glass on the sealing cover 23 allows the operator to easily observe the placement and positioning of the headlights inside the testing chamber 1, as well as the status during the testing process.

[0027] In this embodiment, the negative pressure generating structure includes a piston cylinder 10 fixedly connected to the outside of the detection chamber 1, a piston plate 11 slidably connected to the inside of the piston cylinder 10, a stopper rod 12 fixedly connected to the outside of the piston plate 11, a connecting rod 13 hinged to the right end of the stopper rod 12, and a linkage structure disposed outside the connecting rod 13. A suction pipe 14 is fixedly connected between the piston cylinder 10 and the detection chamber 1. A one-way valve is fixedly installed inside the suction pipe 14. An exhaust pipe 15 is fixedly connected to the left side of the piston cylinder 10. The stopper rod 12 is slidably connected to the inside of the piston cylinder 10 via the connecting rod 13 and extends to its outside.

[0028] The linkage structure includes a fixed rod 16 fixedly connected to the top of the partition 6, a rack 17 fixedly connected to the bottom of the fixed rod 16, a connecting plate 18 fixedly connected to the outside of the detection chamber 1, a rotating shaft 19 rotatably connected inside the connecting plate 18, and a gear 20 and a turntable 21 fixedly installed outside the rotating shaft 19. When the partition 6 moves downward, it causes the fixed rod 16 at its top to slide downward synchronously within the limiting seat 22. The rack 17 at the bottom of the fixed rod 16 descends accordingly. Since the rack 17 meshes with the gear 20 outside the rotating shaft 19 fixed on the connecting plate 18 outside the detection chamber 1, the descent of the rack 17 causes the gear 20 to rotate. The rotating shaft 19 simultaneously drives the turntable 21 to rotate. When the turntable 21 rotates, the connecting rod 13 causes the piston rod 12 and the piston plate 11 to slide left and right inside the piston cylinder 10. When the piston rod 12 and piston plate 11 slide to the left, the piston cylinder 10 is connected to the inside of the detection chamber 1 through the suction pipe 14. The one-way valve in the suction pipe 14 only allows gas to flow from the detection chamber 1 to the piston cylinder 10. The piston cylinder 10 extracts the gas from the detection chamber 1, forming a negative pressure environment.

[0029] Specifically, the rack 17 and the gear 20 mesh with each other, the connecting rod 13 is rotatably connected to the outside of the turntable 21 via a pin, and the external of the detection box 1 is fixedly connected to a limiting seat 22 that is adapted to the fixed rod 16, and the fixed rod 16 is slidably connected to the inside of the limiting seat 22.

[0030] The working principle of the above embodiments is as follows:

[0031] In use, open the sealing cover 23 on the front of the detection box 1, insert the car headlight, and then close the sealing cover 23. The four support legs at the bottom of the detection box 1 ensure the stability of the device, and the box forms a closed space. The controller's electric push rod 5 operates, and its output end drives the partition 6 to move downwards inside the detection box 1. The partition 6 drives the four sets of elastic telescopic rods 7 and clamping plates 8 at the bottom to descend. After the clamping plates 8 contact the headlight, the elastic telescopic rods 7 retract and the abutment springs 9 are compressed. The four sets of elastic telescopic rods 7 and abutment springs 9 are rectangularly distributed, applying force evenly to fix the headlight and avoid damage, which can adapt to headlights of different shapes. When the partition 6 moves down, it drives the bottom rack 17 to descend. The gear 20 rotates, driving the turntable 21 on the rotating shaft 19 to rotate. The rotation of the turntable 21 causes the connecting rod 13 to drive the piston rod 12 and piston plate 11 to slide left and right inside the piston cylinder 10. When the piston plate 11 moves to the left, the piston cylinder 10 extracts the gas inside the detection box 1 through the air extraction pipe 14 with a one-way valve, forming a negative pressure. Pressure sensor 2 monitors and transmits data in real time the pressure changes inside housing 1. If the pressure change is within the allowable range within a specified time, the headlight is considered to be well sealed; if it exceeds the threshold, it is considered to be poorly sealed. Upon completion of the test, electric push rod 5 drives partition 6 to reset, and all linked components reset accordingly. The exhaust pipe 15 on the left side of piston cylinder 10 is opened to release air, restoring the pressure inside the housing. The sealing cover 23 is then opened to remove the headlight, and the results are processed accordingly.

[0032] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. Any method that can achieve its beneficial effect can be implemented. In addition, the electrical components in this embodiment are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device such as a computer that plays a control role. Those skilled in the art can control the electrical components through simple programming. Moreover, the existing disclosed power connection technology is also common knowledge in the field. Therefore, the specific structural composition and working principle will not be described in detail in this embodiment.

[0033] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0034] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing performance testing device for automotive headlights, characterized in that: The device includes a detection housing (1), a pressure sensor (2) fixedly connected to the inside of the detection housing (1) and extending to the outside of it, a column (3) fixedly connected to the top of the detection housing (1), and a mounting plate (4) fixedly connected to the top of the column (3). The upper surface of the detection housing (1) is provided with a limiting mechanism for limiting and fixing the headlight, and the outside of the detection housing (1) is provided with a negative pressure generating structure. The limiting mechanism includes an electric push rod (5) fixedly installed on the top of the mounting plate (4), a partition plate (6) fixedly connected to the output end of the electric push rod (5), an elastic telescopic rod (7) fixedly installed on the bottom of the partition plate (6), and a clamping plate (8) fixedly connected to the bottom end of the elastic telescopic rod (7). The negative pressure generating structure includes a piston cylinder (10) fixedly connected to the outside of the detection box (1), a piston plate (11) slidably connected to the inside of the piston cylinder (10), a piston rod (12) fixedly connected to the outside of the piston plate (11), a connecting rod (13) hinged to the right end of the piston rod (12), and a linkage structure set outside the connecting rod (13).

2. The sealing performance testing device for automotive headlights according to claim 1, characterized in that: A retaining spring (9) is fixedly installed between the partition (6) and the clamping plate (8). The retaining spring (9) is connected around the outside of the elastic telescopic rod (7). There are four sets of both the retaining spring (9) and the elastic telescopic rod (7), which are distributed in a rectangular shape between the partition (6) and the clamping plate (8).

3. The sealing performance testing device for automotive headlights according to claim 1, characterized in that: The partition (6) is slidably connected to the inside of the detection box (1), and a sealing rubber strip is fixedly connected to the outside of the partition (6). The outer diameter of the partition (6) is adapted to the inner diameter of the detection box (1).

4. The sealing performance testing device for automotive headlights according to claim 1, characterized in that: The linkage structure includes a fixed rod (16) fixedly connected to the top of the partition (6), a rack (17) fixedly connected to the bottom of the fixed rod (16), a connecting plate (18) fixedly connected to the outside of the detection box (1), a rotating shaft (19) rotatably connected to the inside of the connecting plate (18), and a gear (20) and a turntable (21) fixedly installed on the outside of the rotating shaft (19).

5. The sealing performance testing device for automotive headlights according to claim 4, characterized in that: The rack (17) and gear (20) mesh with each other. The connecting rod (13) is rotatably connected to the outside of the turntable (21) via a pin. The detection box (1) is fixedly connected to a limiting seat (22) that is compatible with the fixed rod (16). The fixed rod (16) is slidably connected to the inside of the limiting seat (22).

6. The sealing performance testing device for automotive headlights according to claim 1, characterized in that: A suction pipe (14) is fixedly connected between the piston cylinder (10) and the detection box (1). A one-way valve is fixedly installed inside the suction pipe (14). An exhaust pipe (15) is fixedly connected to the left side of the piston cylinder (10). The piston rod (12) is slidably connected to the inside of the piston cylinder (10) and extends to the outside of it via a connecting rod (13).

7. The sealing performance testing device for automotive headlights according to claim 1, characterized in that: The front of the detection box (1) is hinged with a sealing cover (23), and tempered glass is inlaid inside the sealing cover (23). The bottom of the detection box (1) is fixedly connected with four support legs.

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