An air tightness detection tool for a lamp shade

Abstract

The utility model discloses a kind of air-tightness detection tool for lamp cover, it is related to air-tightness detection tool technical field, including rack, rack outer wall slidingly connected with pressing plate, pressing plate is used to extrude lamp cover, pipeline is fixedly connected to the inner wall of pressing plate, the bottom of pressing plate movably is provided with silica gel pad, positioning mechanism is arranged in the inside of rack, positioning mechanism is used to center positioning to lamp cover, locking mechanism is arranged outside the rack, locking mechanism is used to fix positioning mechanism.The utility model positions lamp cover using positioning mechanism, can quickly position different specifications lamp cover, prevent its deviation, silica gel pad can cover extruded lamp cover top to improve sealing, and there is buffering effect when detecting compression, can protect product to appear to be pressed, scratch, cooperate pipeline to carry out air-tightness detection, improve detection efficiency and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing fixtures, and in particular to an airtightness testing fixture for lamp covers. Background Technology

[0002] Air tightness testing is crucial in many fields, ensuring product safety and performance. In the automotive industry, the air tightness of plastic parts directly affects product quality and user health and safety. Plastic components in automobiles need to have good air tightness to prevent the intrusion of moisture, dust, and harmful gases. However, traditional water dew testing for air tightness is slow and inefficient. Utility Model Content

[0003] The purpose of this invention is to provide an airtightness testing fixture for lamp covers to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an airtightness testing fixture for lamp covers, comprising a frame, wherein a pressure plate is slidably connected to the outer wall of the frame, and the pressure plate is used to squeeze the lamp cover; The pipe is fixedly connected to the inner wall of the pressure plate, and a silicone pad is movably provided at the bottom of the pressure plate; A positioning mechanism is provided inside the frame and is used to center and position the lamp cover. A locking mechanism is provided outside the frame and is used to fix the positioning mechanism.

[0005] Preferably, the positioning mechanism includes a horizontal driving structure and a positioning structure, wherein the horizontal driving structure includes: A rotating shaft is rotatably connected to the inner wall of the frame, and a gear is fixedly sleeved on the outer wall of the rotating shaft; A rack is slidably connected to the inner wall of the frame and meshes with a gear.

[0006] Preferably, the positioning structure includes: A movable plate is slidably connected to the inner wall of the frame and fixedly connected to the outer wall of the rack. A second positioning plate is fixedly connected to the top of the movable plate. The second trapezoidal plate is slidably connected to the inner wall of the frame, and a first positioning plate is slidably disposed on the top of the second trapezoidal plate. An elastic component is disposed on the outside of the first positioning plate.

[0007] Preferably, a connecting rod is fixedly connected to the outer wall of the movable plate, and the end of the connecting rod away from the second trapezoidal plate is fixedly connected to the first trapezoidal plate.

[0008] Preferably, the elastic component includes: A circular rod is slidably connected to the inner wall of a fixed plate, and the first positioning plate is fixedly connected to the outer wall of the circular rod. The first spring is fixedly connected between the first positioning plate and the fixed plate.

[0009] Preferably, the locking mechanism includes: A limiting block is fixedly connected to the outer wall of the frame, and the rotating shaft is rotatably connected to the inner wall of the limiting block; A limiting rod is slidably sleeved on one end of the rotating shaft that passes through the limiting block, and a second spring is fixedly connected between the limiting rod and the limiting block.

[0010] Preferably, a driving component is fixedly connected to the top of the frame, and the driving component is used to drive the pressure plate to move.

[0011] Preferably, there are two movable plates arranged horizontally and symmetrically, and the silicone pad and the pressure plate are movably connected by bolts.

[0012] The technical effects and advantages of this utility model are as follows: This utility model utilizes a positioning mechanism to position the lamp cover, which can quickly position lamp covers of different specifications and prevent them from shifting. The silicone pad can cover and compress the top of the lamp cover to improve the sealing performance, and also has a buffering effect during the pressing test, which can protect the product from being crushed or scratched. When used in conjunction with pipelines for airtightness testing, it can improve the testing efficiency and accuracy. Attached Figure Description

[0013] Figure 1 This is a frontal three-dimensional structural diagram of the present utility model.

[0014] Figure 2 This is a three-dimensional structural diagram of the silicone pad of this utility model.

[0015] Figure 3 This is a three-dimensional structural diagram of the rack of this utility model.

[0016] Figure 4 This is a three-dimensional cross-sectional view of the limiting block of this utility model.

[0017] In the diagram: 1. Frame; 2. Pressure plate; 3. Drive component; 4. First positioning plate; 5. Limiting rod; 6. Silicone pad; 7. Bolt; 8. Pipe; 9. Rack; 10. Rotating shaft; 11. Gear; 12. Connecting rod; 13. First trapezoidal plate; 14. Second trapezoidal plate; 15. Fixing plate; 16. Circular rod; 17. First spring; 18. Second positioning plate; 19. Moving plate; 20. Second spring; 21. Limiting block. Detailed Implementation

[0018] 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.

[0019] This utility model provides, for example Figures 1-4 The image shows a fixture for testing the airtightness of a lamp cover.

[0020] Example 1: Includes a frame 1, a pipe 8, a positioning mechanism, and a locking mechanism. A pressure plate 2 is slidably connected to the outer wall of the frame 1, and the pressure plate 2 is used to compress the lamp cover. The pipe 8 is fixedly connected to the inner wall of the pressure plate 2. A silicone pad 6 is movably installed at the bottom of the pressure plate 2. The positioning mechanism is located inside the frame 1 and is used to center the lamp cover. The locking mechanism is located outside the frame 1 and is used to fix the positioning mechanism. An air inlet is opened on the side wall of the pressure plate 2, and the pipe 8 is installed in the hole so that the external air source enters the tooling into the main unit through the air inlet and the pipe 8. When the mold is closed, the silicone pad 6 and the lamp cover fit tightly together to achieve the purpose of sealing the lamp cover. In specific use: the positioning mechanism is used to position the lamp cover, which can quickly position lamp covers of different specifications and prevent them from shifting. The silicone pad 6 can cover the top of the compressed lamp cover to improve the sealing performance, and it has a buffering effect when testing the pressing, which can protect the product from crushing and scratching. It works with the pipe 8 to perform airtightness testing, improving the testing efficiency and accuracy.

[0021] In one aspect, the positioning mechanism includes a horizontal drive structure and a positioning structure. The horizontal drive structure includes a rotating shaft 10 and a rack 9. The rotating shaft 10 is rotatably connected to the inner wall of the frame 1, and a gear 11 is fixedly sleeved on the outer wall of the rotating shaft 10. The rack 9 is slidably connected to the inner wall of the frame 1, and the rack 9 meshes with the gear 11. The positioning structure includes a movable plate 19 and a second trapezoidal plate 14. The movable plate 19 is slidably connected to the inner wall of the frame 1, and the movable plate 19 is fixedly connected to the outer wall of the rack 9. A second positioning plate 18 is fixedly connected to the top of the movable plate 19, and the second trapezoidal plate 14 is slidably connected to the second positioning plate 14. A first positioning plate 4 is slidably mounted on the top of the second trapezoidal plate 14, which is connected to the inner wall of the frame 1. An elastic component is mounted on the outside of the first positioning plate 4. A connecting rod 12 is fixedly connected to the outer wall of the moving plate 19. The end of the connecting rod 12 away from the second trapezoidal plate 14 is fixedly connected to the first trapezoidal plate 13. The elastic component includes a circular rod 16 and a first spring 17. The circular rod 16 is slidably connected to the inner wall of the fixed plate 15, and the first positioning plate 4 is fixedly connected to the outer wall of the circular rod 16. The first spring 17 is fixedly connected between the first positioning plate 4 and the fixed plate 15. A rack 9 is provided. Two racks 9 are staggered and arranged on both sides of the gear 11, and both racks 9 mesh with the gear 11. A connecting plate is provided between the moving plate 19 and the racks 9. The outer walls of the first trapezoidal plate 13 and the second trapezoidal plate 14 have parallel smooth inclined surfaces, allowing the first trapezoidal plate 13 to push the second trapezoidal plate 14 to move. There are two moving plates 19 arranged horizontally and symmetrically. A bolt 7 is movably connected between the silicone pad 6 and the pressure plate 2, allowing workers to easily replace the silicone pad 6. A driving component 3 is fixedly connected to the top of the frame 1, and the driving component 3 is used to drive the pressure plate 2 to move. The driving component 3 uses a hydraulic cylinder available on the market. In specific use, when the lamp cover is fixed, the gear 11 rotates, the gear 11 drives the rack 9 to move, the rack 9 drives the moving plate 19 to move, the moving plate 19 drives the second positioning plate 18 and the first trapezoidal plate 13 to move, the first trapezoidal plate 13 drives the first positioning plate 4 to move through the second trapezoidal plate 14, the first positioning plate 4 first abuts against the lamp cover, the second trapezoidal plate 14 squeezes the first spring 17 to continue moving until the second positioning plate 18 abuts against the lamp cover, thus achieving the purpose of positioning the lamp cover.

[0022] Example 2: Example 2 further discloses a locking mechanism based on Example 1, including a limiting block 21 and a limiting rod 5. The limiting block 21 is fixedly connected to the outer wall of the frame 1, and the rotating shaft 10 is rotatably connected to the inner wall of the limiting block 21. The limiting rod 5 is slidably sleeved on one end of the rotating shaft 10 that passes through the limiting block 21. A second spring 20 is fixedly connected between the limiting rod 5 and the limiting block 21. A limiting groove is provided on the inner wall of the limiting block 21. The limiting rod 5 and the limiting groove of the limiting block 21 can be engaged. The limiting rod 5 is used to fix the gear 11, thereby achieving the purpose of fixing the first positioning plate 4 and the second positioning plate 18. The limiting rod 5 is keyed to the rotating shaft 10. The engagement between the limiting rod 5 and the limiting block 21 can be controlled by sliding the limiting rod 5 on the outer wall of the rotating shaft 10.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas tightness inspection tool for a lamp cover, characterized by, include: A frame (1) is provided with a pressure plate (2) slidably connected to its outer wall. The pressure plate (2) is used to press the lamp cover. Pipe (8), the pipe (8) is fixedly connected to the inner wall of the pressure plate (2), and a silicone pad (6) is movably provided at the bottom of the pressure plate (2); A positioning mechanism is provided inside the frame (1) and is used to center the lamp cover. A locking mechanism is provided outside the frame (1) and is used to fix the positioning mechanism.

2. The air tightness testing tool for a lamp shade according to claim 1, wherein, The positioning mechanism includes a horizontal driving structure and a positioning structure, wherein the horizontal driving structure includes: A rotating shaft (10) is rotatably connected to the inner wall of the frame (1), and a gear (11) is fixedly sleeved on the outer wall of the rotating shaft (10). A rack (9) is slidably connected to the inner wall of the frame (1) and meshes with a gear (11).

3. The leak detection tooling for a lamp envelope of claim 2, wherein, The positioning structure includes: The movable plate (19) is slidably connected to the inner wall of the frame (1), and the movable plate (19) is fixedly connected to the outer wall of the rack (9). A second positioning plate (18) is fixedly connected to the top of the movable plate (19). The second trapezoidal plate (14) is slidably connected to the inner wall of the frame (1). The top of the second trapezoidal plate (14) is slidably provided with a first positioning plate (4), and the outside of the first positioning plate (4) is provided with an elastic component.

4. The leak detection tooling for a lamp envelope of claim 3, wherein, The outer wall of the movable plate (19) is fixedly connected to a connecting rod (12), and the end of the connecting rod (12) away from the second trapezoidal plate (14) is fixedly connected to a first trapezoidal plate (13).

5. The airtightness testing fixture for lamp covers according to claim 4, characterized in that, The elastic component includes: A circular rod (16) is slidably connected to the inner wall of a fixed plate (15), and the first positioning plate (4) is fixedly connected to the outer wall of the circular rod (16). The first spring (17) is fixedly connected between the first positioning plate (4) and the fixing plate (15).

6. A leak detection tool for a lamp envelope as defined in claim 5, wherein, The locking mechanism includes: Limiting block (21), the limiting block (21) is fixedly connected to the outer wall of the frame (1), and the rotating shaft (10) is rotatably connected to the inner wall of the limiting block (21); A limiting rod (5) is slidably sleeved on one end of the rotating shaft (10) that passes through the limiting block (21). A second spring (20) is fixedly connected between the limiting rod (5) and the limiting block (21).

7. A leak detection tool for a lamp envelope as defined in claim 6 wherein, The top of the frame (1) is fixedly connected to a drive component (3), which is used to drive the pressure plate (2) to move.

8. A leak detection tool for a lamp envelope as defined in claim 7, wherein, The movable plates (19) are two in number and arranged horizontally symmetrically. The silicone pad (6) and the pressure plate (2) are movably connected by bolts (7).

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