A gas-tight test fixture

Abstract

The utility model relates to a test fixture, concretely is a kind of measure air-tight test fixture, including base, the base is fixedly arranged with the sealing box for testing the air-tight of product, the sealing box one side is fixedly arranged with connector interface, the base is also fixedly arranged with connecting plate, the connecting plate is fixedly arranged with mounting plate, the mounting plate is rotatably provided with manual lever, connecting rod is symmetrically hinged to the outside of manual lever, the connecting rod of two is hingedly connected with push rod, the push rod one end is fixedly connected with fixed plate, the fixed plate is used to fix the product needing to test air-tight, and the fixed plate is symmetrically slidably provided with limit stop and clamping plate, limit stop surface is arc-shaped and slides in fixed plate slot, clamping plate is provided with clamping force by second spring, when product installation, arc-shaped limit stop is guided to avoid installation jam, product passes through limit stop and limits longitudinal movement, clamping plate is firmly clamped, and guarantee test accuracy and product integrity.

Description

Technical Field

[0001] This utility model relates to a testing fixture, and more particularly to a testing fixture for measuring air tightness. Background Technology

[0002] Sealing products often require airtightness testing, which involves simulating a specific pressure environment to detect whether the product is leaking. However, existing methods are not very accurate, and when multiple products use the same fixture, it affects the accuracy of testing specific products and the sensitivity to detecting minute leaks.

[0003] The Chinese patent for an airtightness testing auxiliary fixture with announcement number CN219777425U allows for easy sample replacement after testing. Simply remove the fixture cover from the fixture base and then remove the aluminum foil sealed on the tested sample from the working surface. Since the aluminum foil is attached to the sample, removing the aluminum foil from the working surface is equivalent to separating the tested sample from the fixture base, thus allowing for the replacement of another sample to be tested. This effectively improves testing efficiency and reduces the workload of testing personnel.

[0004] When installing the product in the airtightness test fixture, installation may be stuck due to placement angle deviation, and the product connectors and interfaces may wobble and shift when mating, affecting the accuracy and validity of the test results. Utility Model Content

[0005] The main objective of this invention is to provide a test fixture for measuring air tightness in order to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of this utility model, an airtightness testing fixture is provided, comprising a base, a sealed box for testing the airtightness of a product is fixedly mounted on the base, a connector interface is fixedly mounted on one side of the sealed box, a connecting plate is also fixedly mounted on the base, an mounting plate is fixedly mounted on the connecting plate, a manual lever is rotatably mounted on the mounting plate, connecting rods are symmetrically hinged to the outer side of the manual lever, a push rod is hinged between the two connecting rods, a fixing plate is fixedly connected to one end of the push rod, the fixing plate is used to fix the product whose airtightness needs to be tested, and a limit plate and a clamping plate are symmetrically slidably mounted inside the fixing plate.

[0007] Furthermore, the fixing plate has a slot, the limiting plate and the clamping plate are symmetrically slidably disposed on both sides of the slot, and the surface of the limiting plate is arc-shaped, and the limiting plate is located above the clamping plate.

[0008] Furthermore, the fixing plate has symmetrically formed grooves communicating with the slot, a first spring is fixedly installed in the groove, a first long plate is fixedly connected to the side wall of the limiting plate, the first long plate is slidably installed in the groove, and one end of the first spring is fixedly connected to the inner wall of the groove, and the other end is fixedly connected to the side wall of the first long plate.

[0009] Furthermore, the fixed plate is symmetrically provided with several sliding grooves communicating with the slots. A second spring is fixedly installed in the sliding groove. Several second long plates are fixedly connected to the side wall of the clamping plate. The second long plates are slidably installed in the sliding groove. One end of the second spring is fixedly connected to the inner wall of the sliding groove, and the other end is fixedly connected to the side wall of the second long plate.

[0010] Furthermore, a mounting base is fixedly provided on the mounting plate, one end of the manual lever is rotatably mounted on the mounting base, and a limit block is also fixedly provided on the mounting plate, with the push rod passing through the limit block and slidably connected thereto.

[0011] Furthermore, a slide rail is fixedly installed on the connecting plate, and the fixing plate is slidably mounted on the slide rail.

[0012] Furthermore, the outer wall of the fixing plate is symmetrically fixed with fixing blocks, and the fixing blocks are provided with slots. One end of the slot is a cone shape with a diameter that gradually decreases from the outside to the inside, and the other end is a column shape.

[0013] Furthermore, the outer wall of the sealed box is fixedly provided with limit rods on both sides of the connector interface, and the limit rods are inserted into the slots.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this air tightness testing fixture, a limiting plate with an arc-shaped surface that slides on a slotted fixed plate is provided, as well as a clamping plate provided with clamping force by a second spring. When the product is installed, the arc-shaped limiting plate guides and prevents installation jamming. After the product passes through the limiting plate, the longitudinal movement is restricted. The clamping plate firmly holds the product, and the silicone material prevents wear on the product, ensuring the accuracy of the test and the integrity of the product.

[0016] 2. In this airtightness testing fixture, a limiting rod is set in the sealing box and a slot is set in the fixing plate. When the product connector is docked with the interface, the limiting rod is smoothly entered under the guidance of the conical slot, preventing shaking and displacement, ensuring accurate docking, improving the reliability and stability of airtightness testing, and ensuring the validity of test results. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the air tightness testing fixture in a preferred embodiment of the present invention;

[0018] Figure 2This is a schematic diagram of the overall structure of the fixing plate in a preferred embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of the fixing plate in a preferred embodiment of the present invention;

[0020] Figure 4 This is a preferred embodiment of the present invention. Figure 3 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 5 This is a cross-sectional view of the fixing block in a preferred embodiment of the present invention.

[0022] Figure label:

[0023] 1. Base; 11. Connecting plate; 12. Slide rail;

[0024] 2. Mounting plate; 21. Mounting base; 22. Limiting block;

[0025] 3. Manual lever; 31. Connecting lever; 32. Push lever;

[0026] 4. Fixing plate; 41. Limiting plate; 411. First long plate; 42. Clamping plate; 421. Second long plate; 43. Fixing block; 431. Slot; 44. Groove; 45. Slide; 46. First spring; 47. Second spring;

[0027] 5. Sealed box; 51. Connector interface; 52. Limiting rod. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0029] This embodiment provides an airtightness testing fixture, including a base 1. A sealed box 5 for testing the airtightness of a product is fixedly mounted on the base 1. A connector interface 51 is fixedly mounted on one side of the sealed box 5. A connecting plate 11 is also fixedly mounted on the base 1. An mounting plate 2 is fixedly mounted on the connecting plate 11. A manual lever 3 is rotatably mounted on the mounting plate 2. A connecting rod 31 is symmetrically hinged to the outside of the manual lever 3. A push rod 32 is hinged between the two connecting rods 31. A fixing plate 4 is fixedly connected to one end of the push rod 32. The fixing plate 4 is used to fix the product whose airtightness needs to be tested. A limit plate 41 and a clamping plate 42 are symmetrically slidably mounted inside the fixing plate 4.

[0030] like Figure 2As shown, the fixing plate 4 has a slot, the limiting plate 41 and the clamping plate 42 are symmetrically slidably arranged on both sides of the slot, and the surface of the limiting plate 41 is arc-shaped. The limiting plate 41 is located above the clamping plate 42, and the outer walls of the limiting plate 41 and the clamping plate 42 are made of soft silicone material to avoid abrasion on the surface of the product that needs to be tested for airtightness.

[0031] like Figure 3 and Figure 4 As shown, the fixing plate 4 has symmetrically formed grooves 44 communicating with the slot. A first spring 46 is fixedly installed in the groove 44. A first long plate 411 is fixedly connected to the side wall of the limiting plate 41. The first long plate 411 is slidably installed in the groove 44. One end of the first spring 46 is fixedly connected to the inner wall of the groove 44, and the other end is fixedly connected to the side wall of the first long plate 411.

[0032] like Figure 3 and Figure 4 As shown, the fixed plate 4 is also symmetrically provided with a number of sliding grooves 45 that communicate with the slot. A second spring 47 is fixedly installed in the sliding groove 45. A number of second long plates 421 are fixedly connected to the side wall of the clamping plate 42. The second long plates 421 are slidably installed in the sliding groove 45. One end of the second spring 47 is fixedly connected to the inner wall of the sliding groove 45, and the other end is fixedly connected to the side wall of the second long plate 421.

[0033] like Figure 2 , Figure 3 and Figure 4 As shown, when the product to be tested for airtightness is fixed in the slot of the fixing plate 4, the product is aligned with the slot and pressed down from top to bottom. The two sides of the product first contact the limiting plate 41 and move downward along its arc surface. The arc surface can play a good guiding role, allowing the product to slide down naturally along the correct path during the downward movement, avoiding installation difficulties or jamming caused by the product placement angle deviation. Then the product contacts the side wall of the clamping plate 42. During this process, the limiting plate 41 and the clamping plate 42 move to both sides under the push of the product. The first long plate 411 and the second long plate 421 then move into the groove 44 and the slide 45 respectively and compress the spring. When the product has completely passed through the limiting plate 41, the limiting plate 41 loses the push of the product and slides outward under the action of the first spring 46. At this time, the distance between the two limiting plates 41 is less than the width of the product, thereby restricting the longitudinal movement of the product. Under the elastic force of the second spring 47, the clamping plate 42 always maintains a stable clamping force on the product. It is worth noting that the thickness of the clamping plate 42 is equal to the thickness of the product, achieving precise adaptation.

[0034] like Figure 1As shown, a mounting base 21 is fixedly provided on the mounting plate 2, and one end of the manual lever 3 is rotatably mounted on the mounting base 21. A limit block 22 is also fixedly provided on the mounting plate 2. The push rod 32 passes through the limit block 22 and is slidably connected to it. A through hole is opened through the limit block 22, and the diameter of the through hole is equal to the diameter of the push rod 32. The push rod 32 is slidably installed in the through hole.

[0035] like Figure 1 As shown, a slide rail 12 is also fixedly installed on the connecting plate 11, and the fixed plate 4 is slidably installed on the slide rail 12. Therefore, before testing the airtightness of the product, the manual lever 3 needs to be pulled clockwise to rotate around the hinge point with the mounting base 21. The connecting rod 31 then rotates counterclockwise, thus pulling the push rod 32 to move towards the mounting base 21, thereby moving the fixed plate 4 on the slide rail 12 and moving the fixed plate 4 away from the sealing box 5. Then, the product to be tested for airtightness can be installed on the fixed plate 4. Then, the manual lever 3 is pushed counterclockwise, and the connecting rod 31 rotates clockwise, thus pushing the push rod 32 towards the sealing box 5, thereby moving the fixed plate 4 on the slide rail 12 until the product's connector aligns with the connector interface 51. Then, the airtightness test is performed. At this time, the machine pressurizes the sealing box 5. After the set time is over, the data is observed on the testing instrument, the test connection is disconnected, and the airtightness test is completed.

[0036] like Figure 2 and Figure 5 As shown, fixing blocks 43 are symmetrically fixed on the outer wall of the fixing plate 4. The fixing blocks 43 have slots 431 inside, and one end of the slots 431 is a cone shape with a diameter that gradually decreases from the outside to the inside, while the other end is a column shape.

[0037] like Figure 1 and Figure 5 As shown, the outer wall of the sealing box 5 is fixedly provided with limiting rods 52 on both sides of the connector interface 51. The limiting rods 52 are inserted into the slot 431. When the fixing plate 4 moves with the product, during the process of the product connector docking with the connector interface 51, the limiting rods 52 gradually enter the slot 431. Due to the large outer opening of the conical structure, it can provide a relatively spacious entry space for the limiting rods 52. Even if there is a certain slight angular deviation or positional deviation of the limiting rods 52 when initially inserted, it can gradually adjust its direction under the guidance of the conical surface and move into the slot 431 along the correct path. Moreover, the diameter of the columnar part of the slot 431 matches the diameter of the limiting rods 52, which can prevent the limiting rods 52 from shaking or shifting, and ensure the accuracy of docking between the product connector and the connector interface 51.

[0038] In practical use, before testing the airtightness of the product, the operator pulls the manual lever 3 clockwise, causing it to rotate around the hinge point with the mounting base 21. The connecting rod 31 then rotates counterclockwise, pulling the push rod 32 to move towards the mounting base 21. The fixing plate 4 moves away from the sealing box 5 along the slide rail 12. Then, the product to be tested for airtightness is aligned with the slot in the fixing plate 4, and the product is pressed down from top to bottom. The product's sides first contact the limiting plate 41, moving downwards along its arc-shaped surface. The product continues to move downwards and contacts the side wall of the clamping plate 42. During this process, the limiting plate 41 and the clamping plate 42 are pushed to the sides by the product. The first long plate 411 of the limiting plate 41 moves into the groove 44 and compresses the first spring 46. The second long plate 421 of the clamping plate 42 moves into the slide groove 45 and compresses the second spring 47. When the product has completely passed through the limiting plate 41, the limiting plate 41 loses the pushing force from the product. Under the elastic force of spring 46, the product slides outward, restricting its longitudinal movement. At the same time, under the elastic force of the second spring 47, clamp 42 maintains a stable clamping force on the product. After the product is installed, push the manual lever 3 counterclockwise, and the connecting rod 31 will rotate clockwise, pushing the push rod 32 to move towards the sealing box 5, which will drive the fixing plate 4 to move towards the sealing box 5 on the slide rail 12. During the process of the fixing plate 4 moving with the product and the product connector docking with the connector interface 51 on the sealing box 5, the limiting rods 52 on both sides of the connector interface 51 on the outer wall of the sealing box 5 gradually enter the slots 431 on the fixing block 43 on the outer wall of the fixing plate 4, ensuring that the product connector docks accurately with the connector interface 51. After docking, start the machine to pressurize the air intake of the sealing box 5. After the set time is over, observe the data on the testing instrument. After observing the data, disconnect the test connection. The airtightness test is now complete.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A test fixture for air tightness testing, comprising a base (1), wherein a sealed box (5) for testing the air tightness of a product is fixedly disposed on the base (1), and a connector interface (51) is fixedly disposed on one side of the sealed box (5), characterized in that, A connecting plate (11) is fixedly installed on the base (1), and an mounting plate (2) is fixedly installed on the connecting plate (11). A manual lever (3) is rotatably installed on the mounting plate (2). A connecting rod (31) is symmetrically hinged to the outside of the manual lever (3). A push rod (32) is hinged between the two connecting rods (31). A fixing plate (4) is fixedly connected to one end of the push rod (32). The fixing plate (4) is used to fix the product that needs to be tested for air tightness. A limit plate (41) and a clamping plate (42) are symmetrically slidably installed inside the fixing plate (4).

2. The air tightness testing fixture according to claim 1, characterized in that, The fixing plate (4) has a slot, the limiting plate (41) and the clamping plate (42) are symmetrically slidably arranged on both sides of the slot, and the surface of the limiting plate (41) is arc-shaped, and the limiting plate (41) is located above the clamping plate (42).

3. The air tightness testing fixture according to claim 2, characterized in that, The fixed plate (4) is symmetrically provided with grooves (44) communicating with the slot. A first spring (46) is fixedly provided in the groove (44). A first long plate (411) is fixedly connected to the side wall of the limiting plate (41). The first long plate (411) is slidably provided in the groove (44). One end of the first spring (46) is fixedly connected to the inner wall of the groove (44), and the other end is fixedly connected to the side wall of the first long plate (411).

4. The air tightness testing fixture according to claim 2, characterized in that, The fixed plate (4) is also symmetrically provided with a number of sliding grooves (45) that communicate with the slot. A second spring (47) is fixedly installed in the sliding groove (45). A number of second long plates (421) are fixedly connected to the side wall of the clamping plate (42). The second long plates (421) are slidably installed in the sliding groove (45). One end of the second spring (47) is fixedly connected to the inner wall of the sliding groove (45), and the other end is fixedly connected to the side wall of the second long plate (421).

5. The air tightness testing fixture according to claim 1, characterized in that, A mounting base (21) is fixedly provided on the mounting plate (2). One end of the manual lever (3) is rotatably mounted on the mounting base (21). A limit block (22) is also fixedly provided on the mounting plate (2). The push rod (32) passes through the limit block (22) and is slidably connected to it.

6. The air tightness testing fixture according to claim 1, characterized in that, A slide rail (12) is also fixedly installed on the connecting plate (11), and the fixing plate (4) is slidably installed on the slide rail (12).

7. The air tightness testing fixture according to claim 1, characterized in that, The outer wall of the fixing plate (4) is symmetrically fixed with fixing blocks (43), and the fixing blocks (43) have slots (431) inside. One end of the slot (431) is a cone shape with a diameter that gradually decreases from the outside to the inside, and the other end is a column shape.

8. The air tightness testing fixture according to claim 7, characterized in that, The outer wall of the sealed box (5) is fixedly provided with limit rods (52) on both sides of the connector interface (51), and the limit rods (52) are inserted into the slot (431).

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