Charger shell airtight seal pressing detection equipment and detection method thereof

Abstract

This invention discloses a charger housing gas tightness pressure testing device, relating to the field of charger housing testing. It includes a base and a frame. A testing platform is slidably mounted on the base, and a clamping assembly and a sealing assembly are mounted on the testing platform. The clamping assembly includes a positioning plate mounted on the testing platform. A bidirectional threaded rod is rotatably mounted on the testing platform, and sliders are symmetrically mounted on the testing platform, with clamping plates mounted on the sliders. The sealing assembly includes a piston cylinder mounted on the clamping plates, and a retaining wall is provided on the outer wall of the piston cylinder. This invention achieves centering and positioning of the housing by driving the bidirectional threaded rod to rotate, and drives the two clamping plates to retract inward, achieving clamping and fixing of the side of the housing. The retaining wall abuts against the outer wall of the housing to axially limit the piston cylinder. As the clamping plates continue to advance inward, the gas inside the piston cylinder is forced into the airbag plug, completing the adaptive sealing of the opening on the side of the housing.

Description

Technical Field

[0001] This invention relates to the field of charger housing inspection, specifically to a charger housing gas tightness pressure testing device and its testing method. Background Technology

[0002] Charger housings are mostly made of aluminum alloy die casting. In order to prevent rainwater and moisture from entering the housing and to prevent corrosion and high-voltage short circuits in the internal power circuit board, hidden defects such as sand holes and die casting gaps are easily generated in the housing during the die casting process. These defects cannot be identified by the naked eye. Therefore, after the housing is die-cast, an airtightness test must be carried out to screen out leaky housings in advance and avoid them flowing into the subsequent assembly process, causing the entire machine to be scrapped.

[0003] In current charger housing airtightness testing operations, the die-cast housing is placed on the testing platform positioning seat. After die-casting, the housing has symmetrically arranged side openings on its two side walls (see attached document for details). Figure 12 The two side openings are used to assemble AC high-voltage connectors and DC high-voltage connectors, respectively. During the semi-finished product testing stage, the two side openings are in an open state. Before testing, the operators need to manually assemble the sealing components to seal the two side openings. The testing table is equipped with an annular sealing ring that fits against the bottom opening face of the housing to achieve bottom sealing. Then, the clamping assembly is manually operated to complete the limiting and fixing of the housing. After that, the driving cylinder drives the upper pressure plate to move downward, closing the upper opening of the housing, thereby constructing a sealed testing chamber inside the housing. Then, compressed gas is introduced into the sealed chamber to carry out airtightness testing. After the testing process is completed, the staff also need to manually remove the clamping assembly and the sealing components at the two side openings before the housing to be tested can be taken out for the next round of testing. During this process, the sealing of the openings on both sides, the clamping and limiting of the shell, and the disassembly after testing all rely on manual intervention. The repeated disassembly and assembly of the sealing components and clamping assemblies by manual labor not only increases the labor input, but also results in high material and labor costs due to the high repetitiveness of tooling disassembly and assembly operations. In addition, the consistency of manual operation is poor, and improper assembly of the sealing head or misalignment of the clamping limit can cause sealing failure, resulting in misjudgment of airtightness testing and affecting the overall accuracy of testing.

[0004] In summary, the sealing of the openings on both sides, as well as the clamping, limiting, and disassembly of the shell, all rely on manual labor. This results in high labor costs, low efficiency from repetitive work, poor consistency in manual operation, and easy deviations in sealing and limiting, which can easily lead to sealing failure, misjudgment of airtightness testing, and difficulty in guaranteeing testing accuracy. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a charger housing airtightness pressure testing device and its testing method, so as to solve the technical problems that the sealing of the openings on both sides and the clamping and disassembly of the housing rely on manual labor, resulting in high labor costs, low work efficiency, poor consistency of manual operation, and easy to cause sealing failure and misjudgment of airtightness.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a charger housing gas tightness pressure testing device, comprising a base and a frame, wherein a testing platform is slidably arranged in the vertical direction of the base, and a clamping assembly and a sealing assembly are arranged on the testing platform; The clamping assembly includes a positioning plate disposed on the testing table, a bidirectional threaded rod rotatably disposed on the testing table, wherein the bidirectional threaded rod is used to drive the positioning plate to slide, and a slider is symmetrically disposed on the testing table, the slider can be laterally displaced by the vertical sliding of the testing table itself, and a clamping plate is disposed on the slider. The sealing assembly includes a piston cylinder disposed on a clamping plate. The outer wall of the piston cylinder is provided with a baffle for fitting against the outer wall of the housing. An airbag plug is disposed on one side of the piston cylinder located on the baffle. The airbag plug can be inflated or deflated by sliding the clamping plate.

[0007] By adopting the above technical solution, the bidirectional threaded rod is driven to rotate, causing the two positioning plates on both sides to feed in opposite directions, thus completing the centering and positioning of the housing. At the same time, during the downward movement of the testing platform, the two clamping plates on both sides are driven to retract inward through the linkage transmission of the support rod, thereby achieving the clamping and fixing of the side of the housing. During the inward feeding process of the clamping plates, the piston cylinder is first inserted into the openings on both sides of the housing. The axial limit of the piston cylinder is achieved by the barrier abutting against the outer wall of the housing. When the clamping plates continue to feed inward, the push rod pushes the piston to slide axially in the inner cavity of the piston cylinder, forcing the gas in the piston cylinder into the airbag plug, causing the airbag plug to expand radially and tightly fit the inner wall of the opening, thus completing the self-adaptive sealing of the opening on the side of the housing.

[0008] The present invention is further configured such that a compressed air pipe and a detection component are provided inside the base, one end of the compressed air tank is connected to the compressed air pipe, and one end of the compressed air pipe extends through to the detection platform.

[0009] Preferably, the compressed air pipe is led out from the compressed air tank inside the base and runs through to the testing station, which can provide a stable air supply to the work station. The built-in arrangement of the compressed air pipe can simplify the external pipeline layout, avoid pipeline interference with the clamping of moving parts, and deliver the air source to the work station of the testing station. This facilitates the supply of air for air tightness testing in conjunction with the housing sealing structure, ensuring a stable and smooth air supply path for testing.

[0010] The invention is further configured such that a fixed gear is provided on one side of the bidirectional threaded rod, wherein the fixed gear can be rotated by a rack, and a threaded sleeve is symmetrically slidably provided on the outer wall of the bidirectional threaded rod, the top of which is connected to a positioning plate.

[0011] Preferably, during the downward sliding of the pressure plate driving the testing platform, its rack will drive the fixed gear inside the testing platform to rotate. During this process, the bidirectional threaded rod rotates synchronously, thereby realizing that the threaded sleeve drives the two sets of positioning plates to slide inward, completing the centering and positioning operation of the housing. The positioning plate not only plays the role of limiting and clamping, but also ensures that the piston cylinder is stably inserted into the openings on both sides of the housing, improving the overall practicality.

[0012] The invention is further configured such that one end of the piston cylinder is inserted into a clamping plate, and a compression spring is provided inside the clamping plate, wherein one end of the compression spring is connected to the piston cylinder.

[0013] Preferably, after the enclosure comes into contact with the outer wall of the shell, when the slider continues to drive the clamp to move, its piston cylinder will squeeze the internal compression spring. After the subsequent test is completed, when the limit is released by reverse reset, the piston cylinder moves under the reset action of the compression spring, and cooperates with the piston to extract the gas in the airbag plug under the inflation state.

[0014] The present invention is further configured such that a piston is slidably disposed inside the piston cylinder, one end of the piston is connected to a push rod, one end of the push rod passes through the piston cylinder and is fixedly connected to the clamping plate, and an air hole is opened inside the piston cylinder, which communicates with the airbag plug.

[0015] Preferably, the piston is fixed in place by the action of the push rod, and then slides in the piston cylinder. The piston is fixed to ensure the discharge and inflation of gas in the piston cylinder. The setting of the air hole allows the gas in the piston cylinder to be inflated and discharged back and forth in the air bladder plug.

[0016] The present invention is further configured such that a support rod is hinged to the top of the base, and one end of the support rod is hinged to the slider.

[0017] Preferably, when the testing platform slides downward through the pressure plate, the support rod at its bottom will rotate through the hinge, thereby driving the slider at one end to move on the testing platform and thus moving the clamping plate.

[0018] The present invention is further configured such that a tooth block is provided on one side of the tooth bar, wherein the tooth block is partially provided.

[0019] Preferably, the rack is partially equipped with tooth blocks, which mesh with the fixed gear only during the effective stroke of the test table's downward movement and disengage during the non-working stroke. This avoids driving the positioning plate to move throughout the entire downward movement of the test table, allowing the positioning plate to perform centering and positioning only after the housing is in contact with pressure. Furthermore, the partially equipped tooth blocks are located at the top of the rack, enabling positioning via the positioning plate during the test process, followed by clamping and limiting via the clamping plate.

[0020] The present invention is further configured such that a cylinder is provided within the frame, and a pressure plate is connected to the output end of the cylinder, the pressure plate being able to slide vertically via the cylinder.

[0021] Preferably, the cylinder facilitates the downward sliding of the pressure plate at the output end, allowing it to release different pressures and improving the overall practicality of the test.

[0022] A method for pressure testing the gas tightness of a charger housing, using the gas tightness testing equipment for a charger housing as described in claim 1, includes the following steps: Step 1: By placing the die-cast charger housing on the testing table, the cylinder will drive the pressure plate to slide down. In the initial stage, the pressure plate contacts the housing, filling the gap between the bottom of the housing and the sealing gasket. Then it continues to slide down, causing the entire testing table to slide down. Step 2: During the downward movement of the testing platform, the rack will drive the fixed gear to rotate, causing the positioning plate to slide and push the housing to the middle position. At the same time, the support rod will cooperate with the slider to drive the clamping plate to move, completing the positioning and clamping work of the housing. In addition, the piston in the piston cylinder will discharge the internal gas into the airbag plug, so that the airbag plug fills the gap of the opening in the housing. Step 3: Inflate the cavity of the shell with gas from the gas tank through the compressed air tube for 5 seconds, then maintain the pressure for 10 seconds. Observe whether the internal pressure is stable to determine whether the sealing performance of the shell is qualified. Then, depressurize for 5 seconds and repeat the above process until all testing is completed.

[0023] By adopting the above technical solution, the centering and positioning of the shell is completed by driving the bidirectional threaded rod to rotate, and the two side clamps are driven to retract inward to achieve clamping and fixing of the side of the shell. The enclosure abuts against the outer wall of the shell to achieve axial limiting of the piston cylinder. When the clamps continue to feed inward, the gas in the piston cylinder is forced into the airbag plug to complete the adaptive sealing of the opening on the side of the shell.

[0024] In summary, the present invention has the following main beneficial effects: 1. This invention features a testing platform on the base. After the housing to be tested is placed on the sealing gasket of the testing platform, a cylinder drives the pressure plate to move downward. After the pressure plate contacts the upper surface of the housing, it drives the testing platform to move downward synchronously against the elastic force of the support spring. Through the gear and rack transmission pair formed by the meshing of the rack and pinion, the bidirectional threaded rod is driven to rotate, causing the positioning plates on both sides to feed in opposite directions, thus completing the centering and positioning of the housing. At the same time, during the downward movement of the testing platform, the support rod drives the clamping plates on both sides to retract inward through linkage transmission, thereby clamping and fixing the sides of the housing. In this process, there is no need for manual alignment and locking operations, which greatly reduces the manual operation links and manpower input. Moreover, the positioning reference has strong consistency, which can effectively ensure the positioning accuracy of the testing station. 2. This invention features a piston cylinder slidably mounted on one end of a clamping plate. During the inward feeding process of the clamping plate, the piston cylinder is first inserted into the openings on both sides of the housing. The piston cylinder is axially limited by the surrounding barrier against the outer wall of the housing. As the clamping plate continues to feed inward, the push rod pushes the piston to slide axially within the piston cylinder cavity, forcing the gas inside the piston cylinder into the airbag plug. This causes the airbag plug to expand radially and tightly fit against the inner wall of the opening, completing the adaptive sealing of the side opening of the housing. The airbag plug can adaptively compensate for the dimensional tolerance of the opening and the shape and position deviation of the inner wall, effectively avoiding the sealing failure that is prone to occur in rigid sealing structures and ensuring the accuracy of the test results. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the structure of the shell in the initial state of detection according to the present invention; Figure 3 For the present invention Figure 2 Enlarged view of A in the middle; Figure 4 This is a schematic diagram of the structure of the housing under the clamping state for detection according to the present invention; Figure 5 This is a schematic diagram of the clamping plate structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of B in the middle; Figure 7 This is a schematic diagram of the gear transmission structure of the testing table of the present invention; Figure 8 This is a cross-sectional view of the clamping plate of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of C; Figure 10 This is a schematic diagram of the sealing gasket structure of the present invention; Figure 11 This is a schematic diagram of the positioning plate structure of the present invention; Figure 12This is a schematic diagram of the charger housing structure of the present invention.

[0026] Explanation of reference numerals in the attached figures: 1. Base; 2. Frame; 3. Pressure plate; 4. Cylinder; 5. Testing table; 6. Compressed air pipe; 7. Support rod; 8. Clamping plate; 9. Support spring; 10. Positioning plate; 11. Double-ended threaded rod; 12. Threaded sleeve; 13. Gear rack; 14. Slider; 15. Piston cylinder; 16. Enclosure; 17. Airbag plug; 18. Fixed gear; 19. Compression spring; 20. Top rod; 21. Piston; 22. Sealing gasket. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] The embodiments of the present invention will now be described.

[0029] Example 1: Please refer to Figures 1-12 The device and method for testing the airtight pressure of a charger housing are shown. The device includes a base 1, a frame 2, a test platform 5, a pressure plate 3, a clamping mechanism, a sealing mechanism, and a transmission mechanism. The test platform 5 is slidably arranged in the vertical direction of the base 1. A sealing gasket 22 is installed on the test platform 5. The sealing gasket 22 is made of flexible rubber material. The operator places the charger housing to be tested on the sealing gasket 22. A cylinder 4 is arranged in the frame 2. The pressure plate 3 is connected to the output end of the cylinder 4. Under the action of the cylinder 4, the pressure plate 3 at the output end is easily driven to slide downward. When the pressure plate 3 contacts the housing, it compensates for the gap between the bottom of the housing and the sealing gasket 22, so that a test sealing cavity is formed between the housing and the sealing gasket 22. Subsequently, cylinder 4 continues to drive pressure plate 3 to press the testing table 5. A rack 13 is fixedly installed vertically on the testing table 5, and a fixed gear 18 that meshes with rack 13 is rotatably installed inside the testing table 5. One end of the fixed gear 18 is connected to a bidirectional threaded rod 11. When the testing table 5 slides downward under the action of pressure plate 3, rack 13 drives the internal fixed gear 18 to rotate, thereby causing the bidirectional threaded rod 11 on the testing table 5 to rotate. Threaded sleeves 12 are symmetrically slidably installed on the outer wall of the bidirectional threaded rod 11. The top of the threaded sleeves 12 is connected to the positioning plate 10. During this process, the bidirectional threaded rod 11 rotates synchronously, realizing that the threaded sleeves 12 drive the two sets of positioning plates 10 to slide inward, completing the centering and positioning operation of the shell. Furthermore, a support rod 7 is hinged to the top of the base 1. One end of the support rod 7 is hinged to the slider 14. When the detection table 5 slides down through the pressure plate 3, the support rod 7 at the bottom will rotate through the hinge, thereby driving the slider 14 at one end to move on the detection table 5. At the same time, a clamping plate 8 is provided on the slider 14. Through the linkage transmission of the support rod 7, the clamping plates 8 on both sides are driven to retract inward, thereby clamping and fixing the side of the shell. In this process, there is no need for manual alignment and locking operations, which greatly reduces the manual operation links and manpower input. A piston cylinder 15 is slidably provided at one end of the clamping plate 8. A retaining 16 is provided on the outer wall of the piston cylinder 15. During the inward feeding process through the clamping plate 8, the piston cylinder 15 is first inserted into the openings on both sides of the shell. The retaining 16 abuts against the outer wall of the shell to achieve axial limitation of the piston cylinder 15. An airbag plug 17 is provided on one side of the enclosure 16 on the piston cylinder 15. A piston 21 is slidably arranged inside the piston cylinder 15. One end of the piston 21 is connected to a push rod 20. One end of the push rod 20 passes through the piston cylinder 15 and is fixedly connected to the clamping plate 8. An air hole is opened in the piston cylinder 15 and communicates with the airbag plug 17. When the clamping plate 8 continues to feed inward, the push rod 20 pushes the piston 21 to slide axially in the inner cavity of the piston cylinder 15, and forces the gas in the piston cylinder 15 into the airbag plug 17, so that the airbag plug 17 expands radially and fits tightly against the inner wall of the opening, thus completing the adaptive sealing of the opening on the side of the shell. The airbag plug can adaptively compensate for the dimensional tolerance of the opening and the form and position deviation of the inner wall, effectively avoiding the sealing failure that is prone to occur in rigid sealing structures. Furthermore, a support spring 9 is provided at the bottom of the testing table 5. The support spring 9 can be used for the subsequent reset of the testing table 5, ensuring that the support rod 7 can drive the clamping plate 8 to slide out of the opening of the housing.

[0030] For details regarding the above embodiments, please refer to [link / reference]. Figure 1 The base 1 contains a compressed air pipe 6 and a testing component. One end of the compressed air tank is connected to the compressed air pipe 6, and the other end of the compressed air pipe 6 extends to the testing table 5. The compressed air pipe 6 is led out from the compressed air tank inside the base and passes through the testing table 5, providing a stable air supply to the workstation. The internal arrangement of the compressed air pipe 6 simplifies the external pipeline layout and avoids pipeline interference with the clamping of moving parts. It delivers the air source to the workstation of the testing table 5, which is convenient for cooperating with the housing sealing structure to complete the airtightness test air supply and ensures a stable and smooth test air source path. The specific testing process and components are prior art to those skilled in the art, and therefore are not described in detail in this application.

[0031] For details regarding the above embodiments, please refer to [link / reference]. Figure 8One end of the piston cylinder 15 is inserted into the clamping plate 8. A compression spring 19 is installed inside the clamping plate 8. One end of the compression spring 19 is connected to the piston cylinder 15. After the enclosure 16 contacts the outer wall of the housing, when the slider 14 continues to drive the clamping plate 8 to move, the piston cylinder 15 will squeeze the internal compression spring 19. After the subsequent test is completed, when the limit is released by reverse reset, the piston cylinder 15 moves under the reset action of the compression spring 19, and cooperates with the piston 21 to draw the gas in the airbag plug 17 under the inflation state.

[0032] Example 2: Please refer to Figure 6 The device and method for testing the airtightness of a charger housing are shown. The overall structure is similar to that of Embodiment 1. A toothed block is provided on one side of the rack 13. The toothed block is partially provided. The toothed block is only partially provided on the rack and engages with the fixed gear 18 during the effective stroke of the test table 5. It disengages during the non-working stroke, which avoids driving the positioning plate to move throughout the entire downward stroke of the test table 5. This allows the positioning plate 10 to perform centering and positioning only after the housing is in contact with pressure. The partially provided toothed block is located at the top of the rack 13. During the test, it can first be positioned towards the positioning plate 10, and then clamped and limited by the clamping plate 8.

[0033] In practical operation, the present invention is used by placing the charger housing to be tested on the sealing gasket 22 on the testing platform 5. Then, the cylinder 4 in the frame 2 will drive the pressure plate 3 at the output end to move downward. When the pressure plate 3 contacts the housing, its sealing gasket 22 will compensate for the gap at the bottom of the housing. As the cylinder 4 drives the pressure plate 3 to continue sliding, it drives the testing platform 5 to overcome the elastic force of the support spring 9 and move downward synchronously. Through the gear and rack transmission pair formed by the meshing of the rack 13 and the fixed gear 18, the bidirectional threaded rod 11 is driven to rotate, so that the positioning plates 10 on both sides are fed in opposite directions to complete the centering and positioning of the housing. During the subsequent sliding process, a slider 14 is hinged to one end of the support rod 7. During this process, the slider 14 slides inward through the support rod 7, thereby driving the clamping plates 8 on both sides to retract inward and clamping and fixing the side of the housing. This process eliminates the need for manual alignment and locking, significantly reducing manual operation and manpower. Furthermore, during the sliding process, the piston cylinder 15 at one end of the clamping plate 8 is inserted into the openings on both sides of the housing. Since a retaining wall 16 is provided on the outer wall of the piston cylinder 15, the retaining wall 16 abuts against the outer wall of the housing to axially limit the piston cylinder 15. As the pressure plate 3 drives the housing to continue moving downward to improve the seal, the clamping plate 8 continues to feed inward, causing the internal push rod 20 to push the piston 21 to slide axially in the inner cavity of the piston cylinder 15, forcing the gas in the piston cylinder 15 into the airbag plug 17. This causes the airbag plug 17 to expand radially and tightly fit the inner wall of the opening in the housing, completing the self-adaptive sealing of the opening on the side of the housing and ensuring the accuracy of the test results.

[0034] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A charger housing airtight pressure testing device, comprising a base (1) and a frame (2), characterized in that: The base (1) is slidably provided with a detection platform (5) in the vertical direction, and a clamping assembly and a sealing assembly are provided on the detection platform (5); The clamping assembly includes a positioning plate (10) disposed on the testing table (5), a bidirectional threaded rod (11) is rotatably disposed on the testing table (5), wherein the bidirectional threaded rod (11) is used to drive the positioning plate (10) to slide, and a slider (14) is symmetrically disposed on the testing table (5), wherein the slider (14) can be laterally displaced by the vertical sliding of the testing table (5) itself, and a clamping plate (8) is disposed on the slider (14). The sealing assembly includes a piston cylinder (15) disposed on a clamping plate (8). The outer wall of the piston cylinder (15) is provided with a baffle (16) for fitting against the outer wall of the housing. An airbag plug (17) is disposed on one side of the baffle (16) on the piston cylinder (15), wherein the airbag plug (17) can be inflated or deflated by sliding the clamping plate (8).

2. The charger housing airtight pressure testing device according to claim 1, characterized in that: The base (1) is equipped with a compressed air pipe and a detection component. One end of the compressed air tank is connected to a compressed air pipe (6), and one end of the compressed air pipe (6) extends through to the detection platform (5).

3. The charger housing airtight pressure testing device according to claim 1, characterized in that: A fixed gear (18) is provided on one side of the bidirectional threaded rod (11), wherein the fixed gear (18) can be rotated by the rack (13). A threaded sleeve (12) is symmetrically slidably provided on the outer wall of the bidirectional threaded rod (11), and the top of the threaded sleeve (12) is connected to the positioning plate (10).

4. The charger housing airtight pressure testing device according to claim 1, characterized in that: One end of the piston cylinder (15) is inserted into the clamping plate (8), and a compression spring (19) is provided in the clamping plate (8), wherein one end of the compression spring (19) is connected to the piston cylinder (15).

5. The charger housing gas tightness pressure testing device according to claim 4, characterized in that: A piston (21) is slidably disposed inside the piston cylinder (15). One end of the piston (21) is connected to a push rod (20). One end of the push rod (20) passes through the piston cylinder (15) and is fixedly connected to the clamping plate (8). An air hole is opened inside the piston cylinder (15), and the air hole is connected to the airbag plug (17).

6. The charger housing airtight pressure testing device according to claim 1, characterized in that: The top of the base (1) is hinged to a support rod (7), one end of which is hinged to the slider (14).

7. The charger housing airtight pressure testing device according to claim 3, characterized in that: A toothed block is provided on one side of the toothed bar (13), wherein the toothed block is provided in a localized manner.

8. The charger housing airtight pressure testing device according to claim 1, characterized in that: A cylinder (4) is provided inside the frame (2), and a pressure plate (3) is connected to the output end of the cylinder (4). The pressure plate (3) can slide vertically through the cylinder (4).

9. A method for pressure testing the gas tightness of a charger housing, comprising using the pressure testing equipment for the gas tightness of a charger housing as described in claim 1, characterized in that... Includes the following steps: Step 1: By placing the die-cast charger housing on the testing table, the cylinder will drive the pressure plate to slide down. In the initial stage, the pressure plate contacts the housing, filling the gap between the bottom of the housing and the sealing gasket. Then it continues to slide down, causing the entire testing table to slide down. Step 2: During the downward movement of the testing platform, the rack will drive the fixed gear to rotate, causing the positioning plate to slide and push the housing to the middle position. At the same time, the support rod will cooperate with the slider to drive the clamping plate to move, completing the positioning and clamping work of the housing. In addition, the piston in the piston cylinder will discharge the internal gas into the airbag plug, so that the airbag plug fills the gap of the opening in the housing. Step 3: Inflate the cavity of the shell with gas from the gas tank through the compressed air tube for 5 seconds, then maintain the pressure for 10 seconds. Observe whether the internal pressure is stable to determine whether the sealing performance of the shell is qualified. Then, depressurize for 5 seconds and repeat the above process until all testing is completed.

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