An airtightness testing fixture for end caps of automotive oxygen concentrators

Abstract

This utility model discloses an airtightness testing fixture for the end cap of an automotive oxygen concentrator, comprising a fixed bracket and a movable plate. A lower mold is mounted on the fixed bracket, and an upper mold is mounted on the movable plate. A pressure device is mounted on the fixed bracket to drive the upper mold. Product cavities for placing the automotive oxygen concentrator end cap are provided within the upper and lower molds. A sealing structure is provided around the product cavities. A test air hole communicating with the product cavity is provided on one side of the lower mold. This utility model enables the automotive oxygen concentrator end cap to be pressed together to achieve a seal, and then an airtightness test can be performed by supplying gas. The entire test can be completed in conjunction with other gas detection equipment or sensors, or through visual observation. This technical solution is particularly suitable for automotive oxygen concentrator end caps due to its structural design for pressing, sealing, and gas supply.

Description

Technical Field

[0001] This utility model relates to the field of testing fixtures, and in particular to an airtightness testing fixture for the end cap of an automotive oxygen generator. Background Technology

[0002] Automotive oxygen concentrators are devices that produce oxygen using physical methods. Because the internal cavities of these concentrators need to temporarily store oxygen, their sealing requirements are extremely high. The end caps contain several interconnected cavities, and due to manufacturing requirements, air holes or screw holes need to be drilled in different cavities, which increases the risk of leakage. Therefore, airtightness testing of the end caps is necessary to reduce the leakage rate after assembly. The targeted sealing of the cavities in the assembled automotive oxygen concentrator is crucial, and the structure for filling the sealed cavities with gas at equal pressure for testing is also very important. However, current technology lacks a dedicated fixture for airtightness testing of automotive oxygen concentrator end caps. Utility Model Content

[0003] In view of the deficiencies of the existing technology, the technical problem to be solved by this utility model is to provide a fixture that can seal the end cap of an automotive oxygen generator and deliver gas for airtightness testing.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] An airtightness testing fixture for an end cap of an automotive oxygen concentrator includes a fixed bracket and a movable plate. A lower mold is provided on the fixed bracket, and an upper mold is provided on the movable plate. A pressure device for driving the upper mold to move is provided on the fixed bracket. A product cavity for placing the end cap of the automotive oxygen concentrator is provided inside the upper and lower molds. A sealing structure is provided around the product cavity. A test air hole communicating with the product cavity is provided on one side of the lower mold.

[0006] Furthermore, the fixed bracket in this utility model includes an upper plate and a lower plate, and uprights are fixed at the four corners between the upper plate and the lower plate.

[0007] Furthermore, the movable plate in this utility model has perforations at its four corners, and a sliding kit is installed in the perforations. The sliding kit is movably fitted onto the outside of the upright.

[0008] Furthermore, the pressure device in this utility model is a hydraulic cylinder, which is located at the top center of the upper plate. The movable end of the hydraulic cylinder faces downward and extends downward from the bottom of the upper plate. A connecting platform is provided at the top center of the lower plate and is fixedly connected to the movable end of the hydraulic cylinder by screws.

[0009] Furthermore, the product cavity in this utility model includes a cavity one disposed at the bottom of the upper mold and a plurality of cavities two disposed at the top of the lower mold, wherein the number and shape of the cavities two correspond to the bottom test part of the product.

[0010] Furthermore, the sealing structure in this utility model is a sealing strip disposed on the upper edge of the cavity.

[0011] Furthermore, the test air hole in this utility model includes an air inlet hole disposed on the side of the lower mold, and a plurality of air outlet holes communicating with the air inlet hole. The air outlet holes extend from the top of the lower mold and correspond to the bottom test part of the product.

[0012] In summary, the advantages of this utility model over the prior art are:

[0013] This invention utilizes a fixture to press and seal the end cap of an automotive oxygen concentrator, and then performs an airtightness test by supplying gas. The entire test is completed in conjunction with other gas detection equipment or sensors, or through visual observation. The structural design of this technical solution, including the fixture's pressing, sealing, and gas supply mechanisms, is ideally suited for use specifically in automotive oxygen concentrator end caps. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 This is a three-dimensional exploded view of the lower mold and the product of this utility model;

[0016] Figure 3 This is a three-dimensional exploded view of the upper mold and the workpiece of this utility model;

[0017] Figure 4 This is a three-dimensional cross-sectional diagram of the test pores of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] like Figures 1 to 4The present invention preferably provides an airtightness testing fixture for an end cap of an automotive oxygen concentrator, comprising a fixed bracket 1 and a movable plate 2. A lower mold 3 is provided on the fixed bracket 1, and an upper mold 4 is provided on the movable plate 2. A pressure device 5 is provided on the fixed bracket 1 to drive the upper mold 4. A product cavity 6 for placing the end cap of the automotive oxygen concentrator is provided inside the upper mold 4 and the lower mold 3. A sealing structure 7 is provided around the product cavity 6. A test air hole 8 communicating with the product cavity 6 is provided on one side of the lower mold 3. The movable plate can move up and down on the fixed bracket. Since the upper mold is fixed on the movable plate, when the movable plate is driven downward by the pressure device, the upper mold gradually closes on the lower mold, sealing the end cap of the automotive oxygen concentrator pre-placed in the product cavity, and achieving a complete seal through the sealing structure. At this time, gas is supplied to the test air hole by an external airtightness testing machine, so that the gap between the product cavity and the end cap is filled with gas. If there is a gas leak, the airtightness testing machine can detect it. The airtightness testing machine is an existing technology that can perform gas transportation and leak detection.

[0020] The fixed bracket 1 described in this utility model includes an upper plate 11 and a lower plate 12, with uprights 13 fixed at the four corners between the upper plate 11 and the lower plate 12. The upper plate, lower plate, and uprights are all fixedly connected and are used to support structures such as pressure devices, upper molds, and lower molds.

[0021] In this invention, the movable plate 2 has perforations 21 at its four corners, and sliding components 22 are installed within the perforations 21. The sliding components 22 are movably fitted onto the outside of the upright 13. The sliding components can be made of plastic and are installed in the perforations using an interference fit. The sliding components can slide up and down on the upright.

[0022] The pressure device 5 described in this invention is a hydraulic cylinder, which is located at the top center of the upper plate 11. The movable end of the hydraulic cylinder faces downward and extends downward from the bottom of the upper plate 11. A connecting platform 51 is provided at the top center of the lower plate 12 and is fixedly connected to the movable end of the hydraulic cylinder by screws. The hydraulic cylinder adopts common equipment in the prior art, consisting of a body and a movable end. The body is fixed to the upper plate, while the movable end extends from the lower side of the upper plate, thereby driving the upper mold to move up and down.

[0023] The product cavity 6 described in this utility model includes a cavity 61 disposed at the bottom of the upper mold 4 and several cavities 62 disposed at the top of the lower mold 3. The number and shape of the cavities 62 correspond to the bottom testing area of ​​the product. Cavity 61 is used to fit the upper structural shape of the end plate of the car oxygen concentrator, and can cover the entire upper side of the end plate. Cavities 62 are used to fit the shape of the bottom testing area of ​​the car oxygen concentrator end plate. Since there are three spaces to be tested at the bottom testing area of ​​the car oxygen concentrator end plate, corresponding to three cavities 62, under the action of the sealing structure, the three testing spaces at the bottom of the end plate will be completely sealed with the three cavities 62, achieving the sealing requirements of the test.

[0024] In this invention, the sealing structure 7 is a sealing strip disposed on the upper edge of the cavity 2 62. The shape of the sealing strip is the same as that of the cavity 2, and the sealing strip can be embedded in the cavity 2.

[0025] The test vent 8 described in this invention includes an air inlet 81 disposed on the side of the lower mold 3, and a plurality of air outlets 82 communicating with the air inlet 81. The air outlets 82 extend from the top of the lower mold 3 and correspond to the bottom test area of ​​the product. The test vent is a three-way system, with the air inlet opening from the side of the lower mold and the air outlets being disposed from the top of the lower mold and corresponding to the positions of the test spaces of each end plate.

[0026] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fixture for testing the airtightness of an end cap of an automotive oxygen concentrator, characterized in that: It includes a fixed bracket (1) and a movable plate (2). A lower mold (3) is provided on the fixed bracket (1), and an upper mold (4) is provided on the movable plate (2). A pressure device (5) for driving the upper mold (4) to move is provided on the fixed bracket (1). A product cavity (6) for placing the end cap of the car oxygen concentrator is provided in the upper mold (4) and the lower mold (3). A sealing structure (7) is provided around the product cavity (6). A test air hole (8) communicating with the product cavity (6) is provided on one side of the lower mold (3).

2. The airtightness testing fixture for the end cap of an automotive oxygen concentrator according to claim 1, characterized in that: The fixed bracket (1) includes an upper plate (11) and a lower plate (12), and uprights (13) are fixed at the four corners between the upper plate (11) and the lower plate (12).

3. The airtightness testing fixture for the end cap of an automotive oxygen concentrator according to claim 2, characterized in that: Perforations (21) are provided at the four corners of the movable plate (2), and sliding components (22) are installed in the perforations (21). The sliding components (22) are movably fitted onto the outside of the upright (13).

4. The airtightness testing fixture for the end cap of an automotive oxygen concentrator according to claim 2, characterized in that: The pressure device (5) is a hydraulic cylinder and is located at the top center of the upper plate (11). The movable end of the hydraulic cylinder faces downward and extends downward from the bottom of the upper plate (11). A connecting platform (51) is provided at the top center of the lower plate (12) and is fixedly connected to the movable end of the hydraulic cylinder by screws.

5. A test fixture for air tightness of an end cap for an automotive oxygen concentrator according to any one of claims 1-4, characterized in that: The product cavity (6) includes a cavity one (61) disposed at the bottom of the upper mold (4) and a plurality of cavities two (62) disposed at the top of the lower mold (3), the number and shape of the cavities two (62) corresponding to the bottom test part of the product.

6. The airtightness testing fixture for the end cap of an automotive oxygen concentrator according to claim 5, characterized in that: The sealing structure (7) is a sealing strip set on the upper edge of cavity two (62).

7. The airtightness testing fixture for an end cap of an automotive oxygen concentrator according to claim 1, characterized in that: The test air hole (8) includes an air inlet (81) provided on the side of the lower mold (3) and a plurality of air outlets (82) communicating with the air inlet (81). The air outlets (82) extend from the top of the lower mold (3) and correspond to the bottom test part of the product.

Images