Air tightness detection production line of automobile lamp assembly

Abstract

The invention belongs to the technical field of automobile lamp production, and discloses an air tightness detection production line of an automobile lamp assembly, which comprises a detection track and a pressure detection chamber arranged below the detection track, and the detection production line further comprises a high-temperature and high-pressure chamber located behind a conveying track of the pressure detection chamber and used for pressurizing and heating the automobile lamp assembly; the normal-pressure detection chamber is located behind the conveying track of the high-temperature and high-pressure chamber and used for detecting the air leakage position of the automobile lamp assembly; wherein the interior of the normal-pressure detection chamber is at normal temperature and normal pressure; infrared cameras are arranged at the top and the bottom of a chamber in the normal pressure detection chamber, and at least two infrared cameras are symmetrically arranged on the front side and the rear side or the left side and the right side of the chamber. Compared with the case lamp assembly filled with carbon dioxide gas and then photoelectric detection is carried out, the detection scheme of the invention has the advantages of high convenience, loose operation requirements and high detection efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile lamp production, and in particular is an air tightness detection production line for automobile lamp assemblies. Background Art

[0002] After the assembly of the automobile headlight assembly is completed, it is necessary to test its various performances, including brightness, dimming, fatigue resistance and air tightness. Among them, the air tightness test is a relatively important part, which determines the performance of the headlight in resisting harsh environments during actual use, such as waterproof and dustproof intrusion. At present, this performance test is generally implemented by combining pressure testing and electro-optical testing. The pressure test is mainly used to detect whether the air tightness is normal, while the electro-optical test is mainly used to detect the main leakage position of the headlight. When performing point optical testing, it is usually necessary to fill the lamp with carbon dioxide gas before testing, and then determine the gas leakage by the change in light refraction caused by the leaked gas. In the process of filling the gas, it is necessary to strictly control the amount of carbon dioxide filled and other parameters, which is prone to errors.

[0003] Therefore, the present application proposes an airtightness detection production line for automobile lamp assemblies to overcome the above-mentioned defects. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides an air tightness detection production line for automobile lamp assemblies.

[0005] To achieve the above object, the present invention provides the following technical solution: an air tightness detection production line for automobile lamp assemblies, comprising a detection track and a pressure detection chamber arranged under the detection track, the detection production line also includes:

[0006] A high temperature and high pressure chamber, which is located behind the conveying track of the pressure detection chamber and is used to pressurize and heat the lamp assembly;

[0007] Normal pressure test chamber, which is located behind the conveying track of the high temperature and high pressure chamber and is used to detect the leaking position of the lamp assembly;

[0008] Wherein, the interior of the normal pressure detection chamber is at normal temperature and pressure;

[0009] In the normal pressure detection chamber, infrared cameras are arranged at the top and bottom of the chamber, and at least two infrared cameras are symmetrically arranged at the front and back or left and right sides of the chamber.

[0010] Preferably, infrared cameras are symmetrically arranged on the front, back, left, and right sides of the normal pressure detection chamber.

[0011] Preferably, the air tightness detection production line further includes a rolling conveying mechanism mounted on the detection track for mounting the vehicle lamp assembly;

[0012] The rolling conveying mechanism comprises a channel steel, the inner side of which is provided with a roller which moves on a detection track and drives the vehicle lamp assembly to be conveyed along the track, and a multi-stage telescopic rod is fixedly installed at the bottom of the channel steel for mounting and conveying the vehicle lamp assembly.

[0013] Preferably, a gear and a rope winding wheel are coaxially arranged on the web of the channel steel, and fixed racks that can mesh with the gear are intermittently arranged on the detection track.

[0014] A steel wire traction rope is wound around the rope winding wheel, and one end of the steel wire traction rope is connected to the lifting lug of the telescopic end of the multi-stage telescopic rod.

[0015] Preferably, a ratchet and ratchet mechanism is also provided on the channel steel, the ratchet of the ratchet and ratchet mechanism is coaxially connected with the rope winding wheel, and the ratchet and ratchet mechanism self-locks and limits the rope winding wheel after the rolling conveying mechanism passes through the fixed rack;

[0016] The rolling conveying mechanism is provided with an unlocking mechanism which can unlock the ratchet and ratchet mechanism when the rolling conveying mechanism carrying the vehicle lamp arrives above the pressure detection chamber, the high-temperature and high-pressure chamber or the normal-pressure detection chamber.

[0017] Preferably, the unlocking mechanism comprises a top block installed on the detection track, and the top block is installed directly above the pressure detection chamber, the high-temperature and high-pressure chamber, and the normal-pressure detection chamber;

[0018] It also includes a chute 1 and a chute 2 which are connected to each other and are respectively provided on the web plate and the bottom plate of the channel steel, wherein the chute 1 is composed of a vertical chute and an inclined chute;

[0019] The first slideway and the second slideway are provided with a connecting rod mechanism, and the connecting rod mechanism includes a sliding rod 1 and a sliding rod 2, the two ends of the sliding rod 1 are respectively slidably connected to the vertical groove of the first slideway and the second slideway, the two ends of the sliding rod 2 are respectively slidably connected to the vertical groove and the inclined groove of the first slideway, and the ends of the sliding rod 1 and the sliding rod 2 are connected;

[0020] The inclined groove track passes through the ratchet mechanism, and the slide bar moves along the detection track with the rolling conveying mechanism and contacts the top block.

[0021] Preferably, the connecting rod mechanism further comprises sliders respectively located in the vertical slot of the first slideway, the inclined slot and the second slideway, and the first slideway and the second slideway are slidably connected with the first slideway and the second slideway through the sliders;

[0022] The slide bar is provided with a convex block for contacting with the top block.

[0023] Preferably, a fixed pulley for guiding the steel wire traction rope is installed at the bottom of the channel steel.

[0024] Preferably, the pressure detection chamber, the high-temperature and high-pressure chamber and the normal-pressure detection chamber are all equipped with a grille support for lifting the vehicle lamp assembly.

[0025] Preferably, the pressure detection chamber, the high-temperature and high-pressure chamber and the normal-pressure detection chamber are all provided with a sealing assembly that cooperates with the multi-stage telescopic rod, and the sealing assembly includes a step block fixedly mounted on the multi-stage telescopic rod, a step sleeve unit assembled on the hinge door and cooperating with the step block, and a sealing strip installed on the end face of the hinge door.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention transports the headlight assembly to a high-temperature and high-pressure chamber for pressurized and heated treatment, wherein the internal environmental treatment temperature of the high-temperature and high-pressure chamber is at least 60°C and the pressure is 150-200Kpa. The inside of the headlight is pressurized. The headlight assembly is then transported to a normal-pressure detection chamber, which has a normal ambient temperature and is provided with infrared camera modules in at least four directions. The thermal pressure in the headlight assembly begins to release outward, and the infrared camera module is used to clearly capture the position of the air leakage thereon and detect the leak. Compared with filling the headlight assembly with carbon dioxide gas and then performing photoelectric detection, the detection scheme of the present application is relatively convenient, has looser operating requirements, and has high detection efficiency.

[0028] The present invention provides a rolling conveying mechanism to carry the headlight assembly between the pressure detection chamber, the high-temperature and high-pressure chamber and the normal-pressure detection chamber, and puts the headlight assembly down for detection when it reaches the detection station. The headlight assembly is lifted by the movement of the rolling conveying mechanism to maintain the conveying height, and then put down when it reaches the station. The defect of the installation of the power source on the conveying line is overcome, and automatic lifting can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic top view of the detection production line of the present invention;

[0030] Figure 2 Schematic diagram of the internal arrangement of the infrared camera module of the present invention;

[0031] Figure 3 It is a schematic diagram of the positions of the detection track, rolling conveying mechanism and detection station of the present invention;

[0032] Figure 4 For the present invention Figure 3 A part of the enlarged schematic diagram;

[0033] Figure 5 It is a side view of the cooperation between the detection station and the rolling conveying mechanism of the present invention;

[0034] Figure 6 For the present invention Figure 5A magnified schematic diagram of part B in FIG.

[0035] Figure 7 It is a structural schematic diagram of the rolling conveying mechanism of the present invention;

[0036] Figure 8 It is a structural schematic diagram of the connecting rod structure of the present invention.

[0037] In the figure: 100, detection track; 101, fixed rack; 102, top block; 200, pressure detection chamber; 300, high temperature and high pressure chamber; 400, normal pressure detection chamber; 500, rolling conveying mechanism; 501, channel steel; 5011, slideway one; 5012, slideway two; 502, roller; 503, gear; 504, rope winding wheel; 505, ratchet ratchet mechanism; 506, connecting rod mechanism; 5061, slide bar one; 5062, slider; 5063, slide bar two; 507, multi-stage telescopic rod; 508, fixed pulley; 601, step sleeve unit; 602, step block; 603, sealing strip; 604, infrared camera; 605, grille support; 700, loading station. DETAILED DESCRIPTION

[0038] 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.

[0039] like Figure 1 to Figure 2 As shown, the present invention provides an air tightness detection production line for automobile lamp assemblies, comprising a detection track 100 and a pressure detection chamber 200 disposed under the detection track 100, and the detection production line further comprises:

[0040] The high temperature and high pressure chamber 300 is located behind the conveying track of the pressure detection chamber 200 and is used to pressurize and heat the vehicle lamp assembly;

[0041] Normal pressure detection chamber 400, which is located behind the conveying track of high temperature and high pressure chamber 300, and is used to detect the leaking position of the lamp assembly;

[0042] The interior of the normal pressure detection chamber 400 is at normal temperature and pressure;

[0043] The normal pressure detection chamber 400 is provided with infrared cameras 604 at the top and bottom of the chamber, and at least two infrared cameras 604 are symmetrically provided at the front and back or left and right sides of the chamber.

[0044] This application is aimed at the air tightness detection of automobile headlight assemblies, and infrared photography is used to calibrate the leaking position. The headlight assembly is transported in a circular loading and unloading manner on the detection track 100, and the headlight assembly is mounted at the loading station 700 and transported to the pressure detection chamber 200 for general air tightness detection. After the detection is completed, its air tightness performance can be directly obtained. The high-temperature and high-pressure chamber 300 and the normal pressure detection chamber 400 are respectively provided with unloading line stations on the front and rear sides. If there are no defects in air tightness, the headlight can be flowed away as a G product at the unloading station before the high-temperature and high-pressure chamber 300. If it is unqualified, it needs to be transported to the high-temperature and high-pressure chamber 300 again for pressurized and heated treatment. The internal environment treatment temperature of the high-temperature and high-pressure chamber 300 is at least 60°C and the pressure is 150-200Kpa. The inside of the headlight is pressurized. The headlight assembly is then transported to the normal pressure detection chamber 400, which is at a general ambient temperature and is provided with infrared camera modules in at least four directions. The thermal pressure in the headlight assembly begins to release outward, so the infrared camera module can clearly capture the leaking position and detect the leak point.

[0045] After the test is completed, the product will be discharged as NG product through the unloading station after the normal pressure test chamber 400, and will be repaired, redone or scrapped according to the leak point.

[0046] The normal pressure detection chamber 400 can be replaced by a normal temperature negative pressure box.

[0047] In the normal pressure detection chamber 400 , infrared cameras 604 are symmetrically arranged on the front, back, left, and right sides of the chamber.

[0048] This is the second implementation method of the camera module arrangement, which is a six-sided setting. It shoots the headlight assembly in six directions: up, down, front, back, left, and right. The infrared image can more accurately and clearly show the leaking position.

[0049] like Figure 3-Figure 8 As shown, the air tightness testing production line also includes a rolling conveying mechanism 500 mounted on the testing track 100 for mounting the vehicle lamp assembly;

[0050] The rolling conveying mechanism 500 includes a channel steel 501, and a roller 502 is arranged on the inner side of the channel steel 501 to move along the detection track 100 to drive the lamp assembly to be conveyed. A multi-stage telescopic rod 507 is fixedly installed at the bottom of the channel steel 501 for mounting and conveying the lamp assembly.

[0051] The rolling conveying mechanism 500 is used to carry the vehicle lamp assembly on the inspection track 100 and lower the hook and other bearing stations at the corresponding inspection station or unloading / loading station for unloading, loading or inspection work.

[0052] like Figure 4 and Figure 6As shown, a gear 503 and a rope winding wheel 504 are coaxially arranged on the web of the channel steel 501, and a fixed rack 101 that can mesh with the gear 503 is intermittently arranged on the detection track 100.

[0053] The rope winding wheel 504 is wound with a steel wire traction rope, and one end of the steel wire traction rope is connected to the lifting ear of the telescopic end of the multi-stage telescopic rod 507.

[0054] In this embodiment, the multi-stage telescopic rod 507 is connected to the rope wheel 504 through a steel wire traction rope, and the rope wheel 504 is coaxially connected to the gear 503. After the gear 503 is meshed and connected with the fixed rack 101, it is transported forward by the rolling conveying mechanism 500 and rolls on it, driving the rope wheel 504 to reel and lift the multi-stage telescopic rod 507. The position of the lifting lug connected to the steel wire traction rope on the multi-stage telescopic rod 507 is on the last stage of the telescopic rod, so as to ensure that a relatively large retraction stroke can be achieved after retraction;

[0055] In addition, the upper telescopic rods of the multi-stage telescopic rod 507 are all provided with through slots extending from the end to the tail end, which are used to receive the lifting ears on the last stage rod, thereby further extending the final retraction stroke.

[0056] like Figure 6 and Figure 7 As shown, a ratchet mechanism 505 is also provided on the channel steel 501, and the ratchet of the ratchet mechanism 505 is coaxially connected with the rope winding wheel 504. The ratchet mechanism 505 self-locks and limits the rope winding wheel 504 after the rolling conveying mechanism 500 passes through the fixed rack 101;

[0057] The rolling conveying mechanism 500 is provided with an unlocking mechanism capable of unlocking the ratchet mechanism 505 when the rolling conveying mechanism 500 carrying the vehicle lights arrives above the pressure detection chamber 200 , the high-temperature and high-pressure chamber 300 or the normal-pressure detection chamber 400 .

[0058] The gear 503 cooperates with the fixed rack 101. When the rolling conveying mechanism 500 moves, the gear 503 is driven to roll and mesh on the fixed rack 101, thereby rotating the rope wheel 504 to reel in the wire traction rope, so that the multi-stage telescopic rod 507 carries the light assembly and lifts it upward. The rope wheel 504 is not blocked during this rotation process, and the ratchet mechanism 505 is in a gear matching state. When the multi-stage telescopic rod 507 carries the light assembly and shrinks to the maximum state or nearly the maximum state, the gear 503 completely passes through the fixed rack 101 and is no longer meshed. The rope wheel 504 is locked by the ratchet mechanism 505 and cannot lower the light assembly. Therefore, the light assembly is mounted at a high position until it reaches the next inspection station and passes through the unlocking mechanism direction.

[0059] like Figure 6-Figure 8As shown, the unlocking mechanism includes a top block 102 installed on the detection track 100, and the top block 102 is installed directly above the pressure detection chamber 200, the high-temperature and high-pressure chamber 300, and the normal-pressure detection chamber 400;

[0060] It also includes a chute 1 5011 and a chute 2 5012 which are connected to each other and are respectively provided on the web and bottom plate of the channel steel 501, wherein the chute 1 5011 is composed of a vertical chute and an inclined chute;

[0061] The slide groove 1 5011 and the slide groove 2 5012 are provided with a connecting rod mechanism 506, and the connecting rod mechanism 506 includes a sliding rod 1 5061 and a sliding rod 2 5063, and the two ends of the sliding rod 1 5061 are respectively slidably connected to the vertical groove of the slide groove 1 5011 and the slide groove 2 5012, and the two ends of the sliding rod 2 5063 are respectively slidably connected to the vertical groove and the inclined groove of the slide groove 1 5011, and the ends of the sliding rod 1 5061 and the sliding rod 2 5063 are connected;

[0062] The inclined groove track passes through the ratchet mechanism 505 , and the slide bar 1 5061 moves along the detection track 100 with the rolling conveying mechanism 500 and contacts the top block 102 .

[0063] The second slide groove 5012 is also provided with an elastic member for supporting the first slide bar 5061 to reset and keep it in an inclined position. During the movement of the rolling conveying mechanism 500 to mount the lamp assembly, the first slide bar 5061 passes through the top block 102, and the first slide bar 5061 contacts the top block 102, causing the first slide bar 5061 to support the first slide bar 5061 to slide, and the angle between the top of the first slide bar 5061 and the web of the channel steel 501 is reduced, and the height is increased. The top and bottom ends of the second slide bar 5063 move upward, and the top of the second slide bar 5063 slides upward along the inclined groove of the first slide groove 5011, thereby moving the ratchet teeth of the ratchet mechanism 505, releasing the locking of the ratchet wheel, and the rope winding wheel 504 can release the wheel and release the line. After the rolling conveying mechanism 500 passes the top block 102, the bottom end of the slide bar 5061 is acted upon by the elastic member and thus can return to the initial position, so that the projection along the track direction 10 coincides with the top block 102 again.

[0064] Both sides of the top block 102 are arranged as slope surfaces to facilitate the sliding movement of the slide bar 5061 thereon.

[0065] like Figure 7 As shown, the linkage mechanism 506 further includes a slider 5062 located in the vertical slot of the first slide slot 5011, the inclined slot and the second slide slot 5012 respectively, and the slider 1 5061 and the slider 2 5063 are slidably connected with the first slide slot 5011 and the second slide slot 5012 through the slider 5062;

[0066] The slide bar 5061 is provided with a protrusion for contacting with the top block 102 .

[0067] Both the first slide bar 5061 and the second slide bar 5063 can slide in the first slide groove 5011 and the second slide groove 5012 through the slider, and the connecting ends of the first slide bar 5061 and the second slide bar 5063 are movably hinged through the slider 5062 located in the vertical groove of the first slide groove 5011. Therefore, the top of the first slide bar 5061 supports the slider 5062 to slide upward in the vertical groove, so as to lift the bottom of the second slide bar 5063, and the top of the second slide bar 5063 supports the slider 5062 at the top of the first slide groove 5011 to slide in the inclined groove, and finally the ratchet gear of the ratchet gear mechanism 505 can be toggled.

[0068] like Figure 6 As shown, a fixed pulley 508 for guiding the steel wire traction rope is installed at the bottom of the channel steel 501.

[0069] Part of the circumference of the fixed pulley 508 is wound around a steel wire guide rope to guide and limit the fixed pulley 508.

[0070] like Figure 2 As shown, the pressure detection chamber 200, the high-temperature and high-pressure chamber 300 and the normal-pressure detection chamber 400 are all equipped with a grille support 605 for supporting the vehicle lamp assembly.

[0071] The grille support 605 is a lifting support. Its grille configuration does not affect the observation of the camera. After the internal inspection is completed, the grille support 605 can push the headlight assembly upward by driving the lifting, and the multi-stage telescopic rod 507 is contracted. Then, the multi-stage telescopic rod 507 is gradually retracted by the rolling conveying mechanism 500, and the headlight assembly is lifted up. The headlight assembly is kept mounted at a position above the pressure detection chamber 200, the high temperature and high pressure chamber 300, and the normal pressure detection chamber 400 for transportation.

[0072] like Figure 2 As shown, the pressure detection chamber 200, the high-temperature and high-pressure chamber 300 and the normal-pressure detection chamber 400 are all provided with a sealing assembly that cooperates with the multi-stage telescopic rod 507. The sealing assembly includes a step block 602 fixedly mounted on the multi-stage telescopic rod 507, a step sleeve unit 601 assembled on the hinge door and cooperating with the step block 602, and a sealing strip 603 installed on the end face of the hinge door.

[0073] The step sleeve unit 601, the step block 602 and the sealing strip 603 cooperate to seal the inner cavity of the pressure detection chamber 200, the high temperature and high pressure chamber 300 and the normal pressure detection chamber 400 when the hinge door is closed. A labyrinth seal is adopted between the step sleeve unit 601 and the step block 602. The step block 602 is provided with three steps. After the step sleeve units 601 on the two hinge doors are closed, they cooperate with the step block 602 to form a step sleeve that cooperates with it. When the door is closed, the step sleeve unit 601 is pressed and contacted with each other, and the two form a multi-level seal to prevent internal air leakage.

[0074] The working principle and use process of the present invention:

[0075] The rolling conveying mechanism 500 mounts the headlight assembly at the loading station 700 and conveys it to the pressure detection chamber 200 for general air tightness testing. After the test, its air tightness performance can be directly obtained. The high-temperature and high-pressure chamber 300 and the normal-pressure detection chamber 400 are respectively provided with unloading line stations on the front and rear sides. If there are no air tightness defects, the headlight can be flowed away as a G product at the unloading station before the high-temperature and high-pressure chamber 300. If it is unqualified, it needs to be conveyed to the high-temperature and high-pressure chamber 300 again for pressurization and heating treatment. The headlight assembly is then conveyed to the normal-pressure detection chamber 400 for pressure release. The normal-pressure detection chamber 400 is provided with an infrared camera module to shoot and identify leaks.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0077] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air tightness detection production line for automobile lamp assemblies, comprising a detection track (100) and a pressure detection chamber (200) arranged below the detection track (100), characterized in that: The detection production line also includes: A high temperature and high pressure chamber (300), which is located behind the conveying track of the pressure detection chamber (200) and is used to pressurize and heat the vehicle lamp assembly; A normal pressure detection chamber (400), which is located behind the conveying track of the high temperature and high pressure chamber (300) and is used to detect the leaking position of the vehicle lamp assembly; Wherein, the interior of the normal pressure detection chamber (400) is at normal temperature and pressure; The normal pressure detection chamber (400) is provided with infrared cameras (604) at the top and bottom of the chamber, and at least two infrared cameras (604) are symmetrically arranged at the front and back or left and right sides of the chamber.

2. The air tightness detection production line for automobile lamp assemblies according to claim 1 is characterized in that: In the normal pressure detection chamber (400), infrared cameras (604) are symmetrically arranged on the front, back, left, and right sides of the chamber.

3. The air tightness detection production line for automobile lamp assemblies according to claim 1 is characterized in that: The air tightness testing production line also includes a rolling conveying mechanism (500) mounted on the testing track (100) for mounting the vehicle lamp assembly; The rolling conveying mechanism (500) comprises a channel steel (501), wherein a roller (502) is arranged on the inner side of the channel steel (501) and moves along the detection track (100) to drive the vehicle lamp assembly to be conveyed, and a multi-stage telescopic rod (507) is fixedly installed at the bottom of the channel steel (501) for mounting and conveying the vehicle lamp assembly.

4. The air tightness detection production line for automobile lamp assemblies according to claim 3 is characterized in that: A gear (503) and a rope-winding wheel (504) are coaxially arranged on the web of the channel steel (501), and fixed racks (101) capable of meshing with the gear (503) are intermittently arranged on the detection track (100). A steel wire traction rope is wound around the rope winding wheel (504), and one end of the steel wire traction rope is connected to the lifting lug at the telescopic end of the multi-stage telescopic rod (507).

5. The air tightness detection production line for automobile lamp assemblies according to claim 4 is characterized in that: A ratchet and ratchet mechanism (505) is also provided on the channel steel (501), wherein the ratchet of the ratchet and ratchet mechanism (505) is coaxially connected to the rope winding wheel (504), and the ratchet and ratchet mechanism (505) self-locks and limits the rope winding wheel (504) after the rolling conveying mechanism (500) passes through the fixed rack (101); The rolling conveying mechanism (500) is provided with an unlocking mechanism capable of unlocking the ratchet and ratchet mechanism (505) when the rolling conveying mechanism (500) carrying the vehicle lamp arrives above the pressure detection chamber (200), the high-temperature and high-pressure chamber (300) or the normal-pressure detection chamber (400).

6. The air tightness detection production line for automobile lamp assemblies according to claim 5 is characterized in that: The unlocking mechanism comprises a top block (102) installed on the detection track (100), and the top block (102) is installed directly above the pressure detection chamber (200), the high-temperature and high-pressure chamber (300) and the normal-pressure detection chamber (400); It also includes a first slide groove (5011) and a second slide groove (5012) which are connected to each other and are respectively provided on the web and bottom plate of the channel steel (501), wherein the first slide groove (5011) is composed of a vertical groove and an inclined groove; A connecting rod mechanism (506) is provided in the slide groove 1 (5011) and the slide groove 2 (5012), and the connecting rod mechanism (506) includes a slide rod 1 (5061) and a slide rod 2 (5063), the two ends of the slide rod 1 (5061) are respectively slidably connected to the vertical groove of the slide groove 1 (5011) and the slide groove 2 (5012), the two ends of the slide rod 2 (5063) are respectively slidably connected to the vertical groove and the inclined groove of the slide groove 1 (5011), and the ends of the slide rod 1 (5061) and the slide rod 2 (5063) are connected; The inclined groove track passes through the ratchet gear mechanism (505), and the sliding rod 1 (5061) moves along the detection track (100) with the rolling conveying mechanism (500) and contacts the top block (102).

7. The air tightness detection production line for automobile lamp assemblies according to claim 6 is characterized in that: The connecting rod mechanism (506) further comprises sliding blocks (5062) respectively located in the vertical groove, the inclined groove and the second sliding groove (5012) of the first sliding groove (5011), and the first sliding rod (5061) and the second sliding rod (5063) are slidingly connected with the first sliding groove (5011) and the second sliding groove (5012) through the sliding blocks (5062); The sliding rod 1 (5061) is provided with a protrusion for contacting with the top block (102).

8. An air tightness detection production line for automobile lamp assemblies according to any one of claims 4 to 7, characterized in that: A fixed pulley (508) for guiding the steel wire traction rope is installed at the bottom of the channel steel (501).

9. An air tightness detection production line for automobile lamp assemblies according to any one of claims 4 to 7, characterized in that: The pressure detection chamber (200), the high-temperature and high-pressure chamber (300) and the normal-pressure detection chamber (400) are all equipped with a grille support (605) for supporting the vehicle lamp assembly.

10. The air tightness detection production line for automobile lamp assemblies according to claim 3 is characterized in that: The pressure detection chamber (200), the high-temperature and high-pressure chamber (300) and the normal-pressure detection chamber (400) are all provided with a sealing assembly that cooperates with the multi-stage telescopic rod (507), and the sealing assembly comprises a step block (602) fixedly mounted on the multi-stage telescopic rod (507), a step sleeve unit (601) assembled on the hinge door and cooperating with the step block (602), and a sealing strip (603) installed on the end surface of the hinge door.

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