Novel submerging type air tightness detection tool for automobile product

Abstract

The utility model provides a kind of novel submergence type air tightness detection tool of automobile product, comprising: base mould, shell product is placed in base mould upper end, three fixed supports are fixedly installed in base mould left end, movable cover plate is rotatably connected in the upper of base mould, sealing module is fixedly installed in movable cover plate bottom part.This kind of novel submergence type air tightness detection tool of automobile product is provided with fixed column, fixed support, movable cover plate, plug and sealing module etc. structure, fixed column and fixed support cooperate movable cover plate, provide stable opening and closing guide and accurate positioning for tool, ensure that sealing operation is fast and reliable;Plug can be sealed product specific interface flexibly under the support of fixed block, fill sealing blind area;Sealing module is covered product surface and key position comprehensively by virtue of the double sealing design of elastic rubber strip and sealing cylinder, effectively prevent gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and more specifically, to a novel submersible airtightness testing fixture for automotive products. Background Technology

[0002] In the automotive manufacturing industry, the airtightness of components is directly related to the safety and reliability of the entire vehicle. In particular, key components such as battery casings and motor controllers of new energy vehicles need to meet IP67 / IP68 waterproof and dustproof standards, making airtightness testing a critical process in the production process.

[0003] However, the technical solution provided by this patent has the following problems:

[0004] Traditional air tightness testing fixtures mostly use rigid sealing structures, which have problems such as insufficient sealing accuracy and poor product tolerance adaptability. Minor surface unevenness or dimensional deviations can easily lead to gas leakage, resulting in misjudgment of test results. In addition, maintenance costs are high, and the entire mold needs to be replaced after the sealing components wear out, which affects production efficiency.

[0005] This invention, with its stable opening and closing, flexible sealing, and double sealing design, enables efficient and accurate submersible airtightness testing of automotive body products. Utility Model Content

[0006] The present invention aims to solve the technical problems mentioned in the background art and provide a new type of submersible air tightness testing fixture for automotive products.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a novel submersible airtightness testing fixture for automotive products, comprising: a base mold, on which a shell product is placed, three fixed supports fixedly installed on the left end of the base mold, a movable cover plate rotatably connected above the base mold, a sealing module fixedly installed at the bottom of the movable cover plate, the fixed supports being arranged in a two-long-one-short configuration, wherein the two long fixed supports are of the same length, and the short fixed support is fixedly installed on the rear side of the upper end of the base mold, and three fixed columns are fixedly installed on the right side of the upper end of the base mold, the installation method and height arrangement of the fixed columns being consistent with the fixed supports, and the fixed columns being rotatably connected to the movable cover plate.

[0008] A further preferred embodiment: each of the fixed columns is fixedly equipped with a rotating rod at its upper end, and the rotating rod is rotatably connected to the movable cover plate.

[0009] A further preferred embodiment: a fixing block is fixedly installed on the upper left side of the base mold, the fixing block is located between two long-side fixing brackets, and a plug is slidably connected to the left end of the fixing block.

[0010] A further preferred embodiment: an airtight connector is fixedly installed at the front end of the base mold, and a placement groove is opened at the upper end of the base mold, into which the shell product is embedded.

[0011] A further preferred embodiment: each of the fixed brackets has a slot at its upper end, and a limiting hole is provided inside the slot. The slot is adapted to one end of the movable cover plate.

[0012] A further preferred embodiment: the right end of each movable cover plate is rotatably connected to a rotating rod.

[0013] A further preferred embodiment: a connecting block is fixedly installed between the two long sides of the movable cover plate, and a sealing cylinder is fixedly installed at the bottom of the connecting block.

[0014] A further preferred embodiment: the left end of the movable cover plate is adapted to the slot, and a limit bolt is threadedly connected to the left side of the upper end of the movable cover plate.

[0015] A further preferred embodiment: the limiting bolt is adapted to the limiting hole.

[0016] A further preferred embodiment: the bottom of the sealing module is equipped with an elastic sealing strip.

[0017] Beneficial effects:

[0018] 1. By setting up fixed columns, fixed brackets, slots, and movable covers, the fixed columns and fixed brackets work together to form a stable guide frame, so that the movable cover remains stable during opening and closing, avoiding shaking or displacement, and ensuring accurate and reliable sealing operation. The matching structure of the slots and movable covers enables fast and accurate positioning. The process of the movable cover sliding down the slots and engaging not only simplifies the operation steps, but also effectively prevents cover misalignment and improves the efficiency of test preparation. At the same time, the slots, together with the limiting structure, provide rigid support for the movable cover during testing, enhance the overall pressure resistance of the tooling, and prevent the cover from displaced due to internal gas pressure, which would lead to sealing failure.

[0019] 2. By setting a fixing block and a plug, the fixing block provides a stable sliding track for the plug, which can accurately seal specific interfaces or through holes of the shell product, fill the gaps outside the coverage of the sealing module, form an all-round sealing system without dead angles, ensure that the testing space is completely sealed, and avoid gas leakage from affecting the test results;

[0020] 3. By incorporating a sealing module, the elastic sealing strip at the bottom of the module, with its excellent elastic deformation capability, can tightly adhere to the surface of the shell product, automatically filling tiny bumps and gaps to form a flexible sealing layer, effectively preventing gas leakage. Simultaneously, the sealing module is connected to a movable cover plate, which can precisely press down when the cover plate is closed. Working in conjunction with the sealing cylinder and other structures, it constructs a three-dimensional sealing system of "surface sealing + point sealing," comprehensively covering the product's sealing area and ensuring the airtightness of the testing space. Furthermore, the sealing module adopts a modular design, facilitating the disassembly and replacement of worn parts. When the sealing strip ages or becomes damaged, maintenance can be completed quickly, reducing the overall maintenance cost of the tooling and extending its service life.

[0021] 4. In summary, this novel submersible airtightness testing fixture for automotive products, through its structure including a fixed column, a fixed bracket, a movable cover plate, a plug, and a sealing module, provides stable opening and closing guidance and precise positioning for the fixture, ensuring fast and reliable sealing operations. The plug, supported by the fixed block, can flexibly seal specific interfaces of the product, filling sealing blind spots. The sealing module, with its dual sealing design of elastic rubber strips and sealing cylinders, fully covers the product surface and critical parts, effectively preventing gas leakage. These structures work together to not only improve the fixture's adaptability to different products and testing efficiency but also reduce maintenance costs through modular design, ensuring the accuracy and stability of test results, and providing a reliable solution for airtightness testing of automotive parts. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the product of this utility model placed in the mold.

[0024] Figure 3 This is a schematic diagram of the mold in the closed state of this utility model.

[0025] Figure 4 This is a side view of the mold in the closed state of this utility model.

[0026] Figure 1-4 In the middle: 1. Base mold; 101. Fixed column; 102. Rotating rod; 103. Fixed block; 104. Plug; 105. Airtight joint; 106. Placement slot; 2. Shell product; 3. Fixed bracket; 301. Slot; 302. Limiting hole; 4. Movable cover plate; 401. Connecting block; 402. Limiting bolt; 403. Sealing cylinder; 5. Sealing module. Detailed Implementation

[0027] The following will refer to the appendix in the embodiments of this utility model. Figures 1-4The technical solutions in the embodiments of this utility model will be clearly and completely described.

[0028] Please see Figure 1-4 In this embodiment of the present invention, a novel submersible airtightness testing fixture for automotive products includes: a base mold 1, a shell product 2 placed on the upper end of the base mold 1, three fixed supports 3 fixedly installed on the left end of the base mold 1, a movable cover plate 4 rotatably connected above the base mold 1, a sealing module 5 fixedly installed at the bottom of the movable cover plate 4, the fixed supports 3 being arranged in a two-long-one-short configuration, wherein the two long fixed supports 3 are of the same length, the short fixed supports 3 are fixedly installed on the upper rear side of the base mold 1, and three fixed posts 101 are fixedly installed on the upper right side of the base mold 1, the installation method and height arrangement of the fixed posts 101 being the same as those of the fixed supports 3, and the fixed posts 101 being connected to the movable cover plate 4. The plate 4 is rotatably connected, and the upper end of the fixed column 101 is fixedly installed with a rotating rod 102. The rotating rod 102 is rotatably connected to the movable cover plate 4. The upper left side of the base mold 1 is fixedly installed with a fixing block 103, which is located between the two long side fixed brackets 3. The left end of the fixing block 103 is slidably connected with a plug 104. The front end of the base mold 1 is fixedly installed with an airtight connector 105. The upper end of the base mold 1 is provided with a placement groove 106. The shell product 2 is embedded in the placement groove 106. The shell product 2 is embedded in the placement groove 106 at the upper end of the base mold 1 to ensure that the product is accurately positioned during testing. The movable cover plate 4 is rotated with the rotating rod 102 at the upper end of the fixed column 101 as the axis. The movable cover plate 4 moves to the left side of the base mold 1. At this time, the fixed brackets 3 (two long and one short) and the fixed column 101 jointly guide the movement of the movable cover plate 4, ensuring its smooth rotation. The fixed sealing module 5 at the bottom of the movable cover plate 4 descends accordingly. When the movable cover plate 4 is closed in place, the sealing module 5 will make tight contact with the upper surface of the shell product 2, forming a sealing structure to prevent gas leakage during the test. After the movable cover plate 4 is closed, the plug 104 at the left end of the fixed block 103 is pushed to slide and seal the interface or through hole on the left side of the shell product 2. Then, through the airtight connector 105 fixedly installed at the front end of the base mold 1, air is injected into the sealed test space to maintain pressure. The entire fixture (including the housing product 2) is placed in a water tank. The airtightness of the product is judged by observing whether bubbles are generated in the water. If there is a leak in the housing product 2, gas will escape from the leak and form bubbles in the water. If no bubbles are generated in the water within a specified time, it means that the airtightness of the housing product 2 is good and the test is qualified. If obvious bubbles are continuously generated, it means that there is a leak in the product and the airtightness is unqualified. After the test is completed, the fixture is first removed from the water, and then the movable cover plate 4 is rotated in the opposite direction to separate it from the base mold 1. The fixture is then opened. Next, the plug 104 is slid off the fixing block 103. Finally, the housing product 2 is taken out from the placement groove 106.

[0029] In this embodiment of the invention, each of the fixed brackets 3 has a slot 301 on its upper end, and a limiting hole 302 is provided inside the slot 301. The slot 301 is adapted to one end of the movable cover plate 4. The right end of each movable cover plate 4 is rotatably connected to the rotating rod 102. A connecting block 401 is fixedly installed between the two long-side movable cover plates 4. A sealing cylinder 403 is fixedly installed at the bottom of the connecting block 401. The left end of the movable cover plate 4 is adapted to the slot 301. A limiting bolt 402 is threadedly connected to the left side of the upper end of the movable cover plate 4. The limiting bolt 402 is adapted to the limiting hole 302. When the movable cover plate 4 is rotated, its left end is aligned with the slot 301 of the fixed bracket 3 and slides down along the slot 301 to the bottom of the slot 301. The movable cover plate 4 is engaged with the slot 301 to form a preliminary positioning. At this time, the right end of the movable cover plate 4 is rotatably connected to the fixed column 101 through the rotating rod 102 to ensure that the cover plate moves smoothly. The limiting bolt 402 is screwed into the upper left side of the movable cover plate 4 so that it passes through the movable cover plate 4 and is screwed into the limiting hole 302 of the fixed bracket 3. The movable cover plate 4 and the fixed bracket 3 are firmly locked through the threaded connection to prevent the cover plate from loosening during the test. The sealing module 5 at the bottom of the movable cover plate 4 is attached to the upper surface of the shell product 2. At the same time, the sealing cylinder 403 at the bottom of the connecting block 401 presses down to tighten the product interface or through hole, forming a double sealing structure of "surface sealing + point sealing" to improve the overall sealing performance.

[0030] In this embodiment of the utility model, the bottom of the sealing module 5 is equipped with an elastic sealing strip. The strip is mostly made of ethylene propylene diene monomer (EPDM) rubber or fluororubber (FKM). It can resist water pressure penetration during immersion testing, and is also resistant to chemical corrosion of the test liquid. Its surface is smooth and dense. It does not release gas during immersion testing, thus avoiding interference with the test results due to air bubbles inside the strip. At the same time, the soft texture of the strip avoids scratches caused by direct friction with the product surface, protecting the appearance of the shell.

[0031] Working principle: The shell product 2 is stably embedded into the placement groove 106 at the upper end of the base mold 1. The limiting effect of the placement groove 106 ensures that the product maintains an accurate position during testing, preventing product displacement from affecting the sealing and testing results. Using the rotating rod 102 at the upper end of the fixed column 101 as the rotation axis, the movable cover plate 4 is rotated to the left side of the base mold 1. During the rotation, the left end of the movable cover plate 4 is precisely aligned with the slot 301 at the upper end of the fixed bracket 3, and slowly slides down along the slot 301 to the bottom, so that the movable cover plate 4 is tightly engaged with the slot 301, achieving initial positioning. During this process, the fixed bracket 3 (two long and one short) and the fixed column 101 together guide the movement of the movable cover plate 4. To ensure smooth rotation and prevent shaking, after the movable cover plate 4 is initially positioned, a limiting bolt 402 is screwed into its upper left side, allowing the limiting bolt 402 to pass through the movable cover plate 4 and screw into the limiting hole 302 of the fixed bracket 3. This threaded connection securely locks the movable cover plate 4 to the fixed bracket 3, preventing the movable cover plate 4 from loosening due to gas pressure during subsequent testing, which would affect the sealing effect. After the movable cover plate 4 is closed, the bottom sealing module 5 descends, and its bottom elastic sealing strip makes close contact with the upper surface of the shell product 2. Utilizing the characteristic of the elastic sealing strip deforming under pressure, it automatically fills the tiny bumps and gaps on the product surface, forming a "flexible surface seal." Simultaneously, the sealing cylinder 403 at the bottom of the connecting block 401 between the two long-side movable cover plates 4 presses downwards to tighten the product interface or through hole, strengthening the seal for key local areas. Combined with the elastic sealing strip, this creates a dual sealing structure of "surface sealing + point sealing," significantly improving overall sealing performance. After the movable cover plate 4 is closed and locked, the plug 104 at the left end of the fixed block 103 is pushed to seal the interface or through hole on the left side of the shell product 2, further ensuring the entire testing space is sealed and preventing gas leakage. Through the airtight connector 105 fixedly installed at the front end of the base mold 1, a certain pressure of gas (such as compressed air) is injected into the sealed testing space. The gas pressure value is set according to the testing standard of shell product 2. After the gas is filled, the pressure is kept stable for a period of time to allow the gas to be fully distributed in the testing space and to ensure the accuracy of the test results. The entire fixture (including shell product 2) after the gas filling and pressure holding is placed smoothly into the water tank so that shell product 2 is completely submerged in the water. At this time, carefully observe the condition of each part of shell product 2 in the water. If there is a leak in shell product 2, the gas will escape from the leak and form bubbles in the water. The location and extent of the leak are judged according to the location, size and number of bubbles. If no bubbles are generated in the water within the specified time, it means that the airtightness of shell product 2 is good and the test is qualified.If obvious bubbles are continuously generated, it indicates that the product has a leak and its airtightness is unqualified. After the test, carefully remove the fixture from the water tank to avoid residual bubbles interfering with the judgment due to shaking. Then, rotate the movable cover plate 4 in the opposite direction to separate it from the base mold 1 with the rotating rod 102 as the axis. Open the fixture. Before rotating, ensure that the limit bolt 402 is completely unscrewed to prevent damage to the fixture structure from forced opening. After the fixture is opened, slide the plug 104 off the fixing block 103 and reset it. Finally, take out the shell product 2 from the placement slot 106. Mark the qualified products and send them to the next process; mark the unqualified products and place them separately for subsequent repair or scrapping.

Claims

1. A novel submersible airtightness testing fixture for automotive products, comprising: A base mold (1) is provided, on which a shell product (2) is placed. Three fixed supports (3) are fixedly installed on the left side of the base mold (1). A movable cover plate (4) is rotatably connected above the base mold (1). A sealing module (5) is fixedly installed at the bottom of the movable cover plate (4). The fixed supports (3) are configured as two long and one short. The two long fixed supports (3) are of the same length. The short fixed support (3) is fixedly installed on the rear side of the upper end of the base mold (1). Three fixed columns (101) are fixedly installed on the right side of the upper end of the base mold (1). The installation method and height arrangement of the fixed columns (101) are the same as those of the fixed supports (3). The fixed columns (101) are rotatably connected to the movable cover plate (4).

2. The novel submersible airtightness testing fixture for automotive products according to claim 1, characterized in that: Each of the fixed columns (101) has a rotating rod (102) fixedly installed on its upper end, and the rotating rod (102) is rotatably connected to the movable cover plate (4).

3. The novel submersible airtightness testing fixture for automotive products according to claim 1, characterized in that: A fixing block (103) is fixedly installed on the upper left side of the base mold (1). The fixing block (103) is located between two long side fixing brackets (3). A plug (104) is slidably connected to the left end of the fixing block (103).

4. The novel submersible airtightness testing fixture for automotive products according to claim 1, characterized in that: An airtight connector (105) is fixedly installed at the front end of the base mold (1), and a placement groove (106) is opened at the upper end of the base mold (1). The shell product (2) is embedded in the placement groove (106).

5. A novel submersible airtightness testing fixture for automotive products according to claim 1, characterized in that: Each of the fixed brackets (3) has a slot (301) on its upper end. The slot (301) has a limiting hole (302) inside it. The slot (301) is adapted to one end of the movable cover plate (4).

6. A novel submersible airtightness testing fixture for automotive products according to claim 2, characterized in that: The right end of each movable cover plate (4) is rotatably connected to the rotating rod (102).

7. A novel submersible airtightness testing fixture for automotive products according to claim 5, characterized in that: A connecting block (401) is fixedly installed between the two long sides of the movable cover plate (4), and a sealing cylinder (403) is fixedly installed at the bottom of the connecting block (401).

8. A novel submersible airtightness testing fixture for automotive products according to claim 7, characterized in that: The left end of the movable cover plate (4) is adapted to the slot (301), and the upper left side of the movable cover plate (4) is threaded with a limit bolt (402).

9. A novel submersible airtightness testing fixture for automotive products according to claim 8, characterized in that: The limiting bolt (402) is adapted to the limiting hole (302).

10. A novel submersible airtightness testing fixture for automotive products according to claim 1, characterized in that: The bottom of the sealing module (5) is equipped with an elastic sealing strip.

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