Air tightness testing device for lamp of electric vehicle

Abstract

The utility model discloses an electric vehicle lamp air tightness testing device which comprises a workbench and a headlight placed above the workbench, the top of the workbench is provided with a four-jaw chuck used for clamping the headlight, and the top of the workbench is provided with a testing mechanism used for vacuumizing and detecting the interior of the headlight. The top of the workbench is further provided with a lifting assembly used for adjusting the height position of the testing end of the testing mechanism, the testing mechanism comprises a suction pipe arranged above the headlight, the tail end of the suction pipe is connected with a vacuum sensor, and the outer surface of the tail end of the suction pipe is fixedly sleeved with a rubber ring. The outer diameter of the rubber ring is larger than the inner diameter of the top opening of the headlight. According to the utility model, when the interior of the headlight is vacuumized, double sealing is carried out along the inner wall and the top surface of the interface of the headlight by using the sealing ring and the rubber ring, so that no new air permeates when the interior of the headlight is vacuumized subsequently, and the test accuracy and the result accuracy are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness testing, in particular to an air tightness testing device for an electric vehicle lamp. Background Art

[0002] Electric vehicle lamps are often exposed to the external environment. Good airtightness prevents moisture and dust from entering, extending the lamp's lifespan. At the same time, the internal circuitry and bulbs must be kept dry and clean. Inadequate airtightness can lead to short circuits or other safety hazards. Therefore, electric vehicle lamps require airtightness testing during the production phase. A common method for testing lamp airtightness is to establish a vacuum environment within the lamp and then test the vacuum level after a set time. However, the seal between the vacuum pipe and the lamp may not be sufficient, causing gas leakage at the interface, which can affect the subsequent test results. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an electric vehicle lamp air tightness testing device to solve the problem raised in the above background technology that when the electric vehicle is vacuumed for subsequent testing, gas leakage at the lamp interface affects the accuracy of subsequent testing.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: an electric vehicle lamp air tightness test device, comprising a workbench and a vehicle headlight placed on the workbench, a four-jaw chuck for clamping the vehicle headlight mounted on the top of the workbench, a testing mechanism for vacuuming and testing the interior of the vehicle headlight mounted on the top of the workbench, and a lifting assembly for adjusting the height position of the testing end of the testing mechanism mounted on the top of the workbench;

[0005] The testing mechanism includes a suction tube arranged above the vehicle headlight, a vacuum sensor is connected to the tail end of the suction tube, a rubber ring is fixedly sleeved on the outer surface of the tail end of the suction tube, and the outer diameter of the rubber ring is larger than the inner diameter of the top opening of the vehicle headlight, and a clamping component is installed on the outer surface of the suction tube for generating a circular extrusion force from top to bottom on the rubber ring when vacuuming the inside of the vehicle headlight.

[0006] Preferably, the pressing assembly includes an extension plate mounted on the surface of the suction pipe, an electric telescopic rod is mounted at the bottom of the extension plate, and an extrusion ring adapted to the curvature of the top surface of the vehicle headlight is mounted at the free end of the electric telescopic rod;

[0007] The extrusion ring is sleeved on the outer surface of the suction pipe, and the outer diameter of the extrusion ring is consistent with the outer diameter of the rubber ring.

[0008] Preferably, a sealing ring is provided on the outer surface of the lower end of the suction pipe, and the outer diameter and the inner diameter of the sealing ring gradually increase from the lower end to the middle end.

[0009] Preferably, a vacuum pump is installed on the top surface of the workbench, and a telescopic tube that is interconnected with the suction pipe is detachably connected to the input end of the vacuum pump.

[0010] Preferably, two symmetrically arranged fan-shaped grooves are provided on the top of the four-jaw chuck, an electric push rod is installed on the top surface of the workbench, and a bottom support plate embedded in the fan-shaped groove is installed at the free end of the electric push rod.

[0011] Preferably, the lifting assembly includes an electric lifting frame arranged behind the four-jaw chuck, a moving block is installed on the front of the electric lifting frame, and folding baffles are connected between the top and bottom of the moving block and the top wall and bottom wall of the electric lifting frame respectively, and a positioning cylinder that is detachably mounted on the surface of the suction pipe is installed on the front of the moving block.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model uses a lifting assembly to extend the tail end of the suction tube inward along the headlight interface by a set distance, and then cooperates with the pressing assembly to generate a downward squeezing force on the rubber ring, so that the bottom of the rubber ring is tightly fitted with the edge of the interface at the top surface of the headlight, thereby ensuring that no new air infiltrates when the interior of the headlight is subsequently vacuumed, thereby effectively ensuring the accuracy of the test and the accuracy of the results.

[0014] 2. After the air tightness test of the headlight is completed, the utility model uses an electric push rod to control the two bottom plates to move upward, thereby lifting the headlight on the top of the four-claw chuck upward, thereby effectively widening the gap between the two and facilitating subsequent removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a structural diagram of the four-jaw chuck of the utility model;

[0017] Figure 3 This is a schematic diagram of the installation structure of the suction pipe and the pressing assembly of the utility model;

[0018] Figure 4 This is a structural diagram of the compression assembly of the utility model.

[0019] In the figure: 1. Workbench; 2. Headlight; 3. Four-jaw chuck; 301. Fan-shaped groove; 302. Electric push rod; 303. Bottom support plate; 4. Testing mechanism; 401. Suction tube; 402. Vacuum sensor; 403. Rubber ring; 404. Clamping assembly; 4041. Extension plate; 4042. Electric telescopic rod; 4043. Extrusion ring; 405. Sealing ring; 406. Vacuum pump; 407. Telescopic tube; 5. Lifting assembly; 501. Electric lifting frame; 502. Moving block; 503. Folding baffle; 504. Positioning cylinder. DETAILED DESCRIPTION

[0020] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] When the electric vehicle lamp is vacuuming the interior for airtightness testing, the sealing of the interface between the vacuum pipe and the lamp may be insufficient, causing gas leakage at the interface, thereby affecting the judgment of subsequent test results, such as Figure 1-Figure 4As shown, in order to effectively ensure the accuracy of the test results. This embodiment proposes an electric vehicle lamp air tightness testing device, which has a workbench 1 and a headlight 2 placed on the workbench 1. A four-claw chuck 3 for clamping the headlight 2 is installed on the top of the workbench 1. The four-claw chuck 3 is a prior art and will not be described in detail here. However, this four-claw chuck 3 is mainly used to clamp and fix the headlight 2 along four directions on the outside of the headlight, aiming to ensure the stability of the headlight 2 during the test phase, and at the same time ensure that the top interface of the headlight 2 and the center of the four-claw chuck 3 are on the same axis. A test mechanism 4 for vacuuming and testing the interior of a headlight 2 is mounted on top of the workbench 1. Also mounted on top of the workbench 1 is a lifting assembly 5 for adjusting the height of the testing end of the test mechanism 4. The test mechanism 4 comprises a suction tube 401 positioned above the headlight 2. A vacuum sensor 402 is connected to the end of the suction tube 401. A rubber ring 403 is fixedly mounted on the outer surface of the end of the suction tube 401. The outer diameter of the rubber ring 403 is larger than the inner diameter of the top opening of the headlight 2. A pressing assembly 404 is mounted on the outer surface of the suction tube 401 to apply a downward pressure to the rubber ring 403 during vacuuming. In practice, the lifting assembly 5 is operated to move the suction tube 401 downward, causing the bottom of the suction tube 401 to extend inward along the interface of the headlight 2 until the bottom wall of the rubber ring 403 contacts the top surface of the headlight 2. This is achieved by controlling the lifting assembly 5 to descend a set distance based on the height of the headlight 2. The pressing assembly 404 is then operated in conjunction with the other components to generate a downward squeezing force on the rubber ring 403, so that the rubber ring 403 fits seamlessly and tightly at the edge of the interface with the top surface of the headlight 2. This ensures that during subsequent tests, no external air enters the headlight 2 along this interface, thereby affecting the accuracy of the test.

[0022] Continuing from the above, the compression assembly 404 comprises an extension plate 4041 mounted on the surface of the suction tube 401. An electrically operated telescopic rod 4042 is mounted at the bottom of the extension plate 4041. The free end of the electrically operated telescopic rod 4042 is mounted with a squeeze ring 4043 that matches the curvature of the top surface of the headlight 2. The squeeze ring 4043 is sleeved onto the outer surface of the suction tube 401, and its outer diameter matches that of the rubber ring 403. The electrically operated telescopic rod 4042 is the driving force that applies downward pressure to the rubber ring 403 by the compression assembly 404. By leveraging its inherent lifting and propulsion capabilities, the squeeze ring 4043 can be adjusted vertically, thereby facilitating 360° squeezing of the rubber ring 403.

[0023] In order to further ensure the sealing between the interface of the headlight 2 and the suction pipe 401, Figure 1 、 Figure 3 and Figure 4As shown, the outer surface of the lower end of the suction tube 401 is sheathed with a sealing ring 405, and both the outer and inner diameters of the sealing ring 405 gradually increase from the lower end to the middle end. Similarly, the diameter of the lower portion of the suction tube 401, which is in contact with the inner wall of the sealing ring 405, also gradually increases from bottom to top, with the diameter at the bottom being smaller than the diameter of the top interface of the headlight 2. Therefore, before vacuuming, it is easier to accurately insert the suction tube 401 downward into the interior of the headlight 2. The sealing ring 405 uses its own sealing properties to achieve a seal between the inner wall of the interface of the headlight 2 and the outer wall of the suction tube 401. This, combined with the top surface seal achieved by the compression assembly 404 and the rubber ring 403 on the edge of the interface of the headlight 2, can optimize the sealing effect.

[0024] A vacuum pump 406 is installed on the top surface of the workbench 1. A telescopic tube 407 that is interconnected with the suction tube 401 is detachably connected to the input end of the vacuum pump 406. The vacuum pump 406 serves as a driving source for vacuuming the inside of the headlight 2, and the telescopic tube 407 itself can stretch and contract under the addition of external force, thereby facilitating the lifting component 5 to drive the suction tube 401 and its tail end structure to adjust their height position.

[0025] Under normal circumstances, the headlight 2 placed on the top of the four-claw chuck 3 is clamped and part of its surface is smooth. For this type of headlight, after the test, the staff needs to insert their fingers into the bottom of the headlight 2 and lift it up before it can be picked up and transferred. However, the gap between the bottom of the headlight 2 and the top surface of the four-claw chuck 3 is small, and it may be difficult to insert the fingers. In order to improve the convenience of picking up the headlight 2 after the test, Figure 1 and Figure 2 As shown, the top of the four-jaw chuck 3 is defined by two symmetrically arranged fan-shaped slots 301. An electric push rod 302 is mounted on the top surface of the workbench 1. The free end of the push rod 302 is fitted with a bottom support plate 303 that fits within the fan-shaped slot 301. By operating the push rod 302, it is urged to extend upward, driving the two bottom support plates 303 upward, thereby lifting the headlight 2 atop the four-jaw chuck 3. This effectively widens the gap between the two, facilitating subsequent removal. Furthermore, the larger fan-shaped bottom support plate 303 ensures stability when the headlight 2 is lifted.

[0026] The lifting assembly 5 includes an electric lift frame 501 positioned behind the four-jaw chuck 3. A moving block 502 is mounted on the front of the electric lift frame 501. Folding baffles 503 are connected to the top and bottom walls of the electric lift frame 501, respectively. These baffles ensure the safety of the interior of the electric lift frame 501 while effectively preventing dust and other debris from entering and disrupting its operation. A positioning cylinder 504 is mounted on the front of the moving block 502, which is removably mounted on the surface of the suction pipe 401.

[0027] It should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements that are inherent to such process, method, article or apparatus.

[0028] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric vehicle lamp air tightness testing device, comprising a workbench (1) and a headlight (2) placed above the workbench (1), characterized in that: A four-jaw chuck (3) for clamping a vehicle headlight (2) is installed on the top of the workbench (1); a testing mechanism (4) for vacuuming and testing the interior of the vehicle headlight (2) is installed on the top of the workbench (1); and a lifting assembly (5) for adjusting the height position of a testing end of the testing mechanism (4) is also installed on the top of the workbench (1); The testing mechanism (4) comprises a suction pipe (401) arranged above the vehicle headlight (2), a vacuum sensor (402) being connected to the tail end of the suction pipe (401), a rubber ring (403) being fixedly sleeved on the outer surface of the tail end of the suction pipe (401), and the outer diameter of the rubber ring (403) being larger than the inner diameter of the top opening of the vehicle headlight (2), and a pressing assembly (404) being installed on the outer surface of the suction pipe (401) for generating an annular squeezing force from top to bottom on the rubber ring (403) when vacuuming the interior of the vehicle headlight (2).

2. The electric vehicle lamp air tightness test device according to claim 1, characterized in that: The pressing assembly (404) comprises an extension plate (4041) mounted on the surface of the suction pipe (401), an electric telescopic rod (4042) mounted at the bottom of the extension plate (4041), and an extrusion ring (4043) adapted to the curvature of the top surface of the vehicle headlight (2) mounted at the free end of the electric telescopic rod (4042); The extrusion ring (4043) is sleeved on the outer surface of the suction tube (401), and the outer diameter of the extrusion ring (4043) is consistent with the outer diameter of the rubber ring (403).

3. The electric vehicle lamp air tightness test device according to claim 2, characterized in that: The outer surface of the lower end of the suction pipe (401) is sleeved with a sealing ring (405), and the outer diameter and inner diameter of the sealing ring (405) gradually increase from the lower end to the middle end.

4. The electric vehicle lamp air tightness testing device according to claim 3, characterized in that: A vacuum pump (406) is installed on the top surface of the workbench (1), and a telescopic tube (407) communicating with the suction tube (401) is detachably connected to the input end of the vacuum pump (406).

5. The electric vehicle lamp air tightness testing device according to claim 1, characterized in that: The top of the four-jaw chuck (3) is provided with two symmetrically arranged fan-shaped grooves (301), the top surface of the workbench (1) is provided with an electric push rod (302), and the free end of the electric push rod (302) is provided with a bottom support plate (303) embedded in the fan-shaped groove (301).

6. The electric vehicle lamp air tightness test device according to claim 1, characterized in that: The lifting assembly (5) comprises an electric lifting frame (501) arranged behind the four-jaw chuck (3); a moving block (502) is installed on the front of the electric lifting frame (501); a folding baffle (503) is connected between the top and bottom of the moving block (502) and the top wall and bottom wall of the electric lifting frame (501), respectively; and a positioning cylinder (504) is installed on the front of the moving block (502) and is detachably sleeved on the surface of the suction pipe (401).

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