Inner cavity sealing leakage testing device

Abstract

The utility model discloses an inner cavity sealing leakage testing device, which relates to the technical field of motor casing sealing detection and comprises a platform, a first pressing plate and a third sealing mechanism used for driving the first pressing plate to move, a movable opening is formed in the middle of the platform, and the first sealing mechanism is arranged below the movable opening. The first sealing mechanism comprises a first air cylinder, a first telescopic end and a sealing rod, a guide ring connected with the movable opening is arranged outside the sealing rod, sealant is installed on the guide ring, a second pressing plate is arranged on the sealant, and a product is placed on the second pressing plate. According to the utility model, through the cooperation of the first sealing mechanism, the second sealing mechanism and the third sealing mechanism, the positions, needing to be sealed, of the upper end face, the lower end face and the side faces of a product can be sealed at the same time, and the leakage testing mode of the device is consistent with the position of the sealing inner wall when the product is assembled. The risk that air leakage from the end face cannot be found is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of motor housing sealing detection, in particular to an inner cavity sealing leak detection device. Background Technique

[0002] In recent years, new energy vehicles have become the focus of the global automotive industry development. Batteries, motors, and electronic controls have become the core key components of pure electric vehicles. Motors mainly consist of a housing, front and rear end covers, a shaft, a stator, a rotor, and wiring harnesses. Among them, the manufacturing of the motor housing is an important part of motor production. The materials of the motor housing generally include cast iron, cast aluminum alloy, steel pipes, steel plates, etc.; the main purpose is to protect the motor from the influence of environments such as rainwater, corrosion, etc. Therefore, the sealing detection after the production of the motor housing is crucial;

[0003] Currently, when developing various types of electric vehicle motor valve housing products, the produced products all need to undergo gas leak detection tests on the inner cavity. Generally, the fixtures on the existing inner cavity sealing leak detection devices only perform sealing detection on one end face of the sealed product, and it is difficult to effectively seal the inner walls of the sealing surfaces at different positions of the product during assembly, resulting in the inconsistency between the sealing end face of the device fixture and the sealing surface of the assembled product. Therefore, it is necessary to develop a sealing inner cavity leak detection device with the sealing end face of the sealing device consistent with the sealing surface of the assembled product. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the defect that the fixtures on the existing inner cavity sealing leak detection devices generally perform sealing detection on one end face of the sealed product, and it is difficult to effectively seal the inner walls of the sealing surfaces at different positions of the product during assembly, resulting in the inconsistency between the sealing end face of the device fixture and the sealing surface of the assembled product, and to propose an inner cavity sealing leak detection device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An inner cavity sealing leak detection device includes a platform, a first pressing plate, and a third sealing mechanism for driving the movement of the first pressing plate. An activity opening is provided in the middle of the platform. A first sealing mechanism is arranged below the activity opening. The first sealing mechanism includes a first cylinder, a first telescopic end, and a sealing rod. A guide ring connected to the activity opening is arranged outside the sealing rod. A sealing glue is installed on the guide ring. A second pressing plate is arranged on the sealing glue. A product is placed on the second pressing plate. An inner cavity sealing head is arranged above the product. The top of the inner cavity sealing head is connected to the bottom of the first pressing plate. A sealing ring is clamped outside the inner cavity sealing head. Second sealing mechanisms are arranged on both sides of the product. A positioning mechanism is arranged on one side of the second sealing mechanism. Limiting mechanisms are arranged on both sides of the first pressing plate.

[0007] By adopting the above technical solution, the sealing rod is driven downward by the first sealing mechanism to move in the direction of the sealant, so that the conical surface of the sealing rod and the conical surface of the sealant are mutually extruded, making the inner wall of the product fit with the sealant, thereby achieving the sealing effect. At the same time, the side sealing head is driven by the second sealing mechanism to seal the detection position on the side of the product. The leak detection method of this structure is consistent with the sealing position of the assembled product, avoiding the risk that the air leakage of the product sealed from the end face by a general fixture cannot be detected.

[0008] Preferably, the sealing rod and the sealant are in conical contact, and the sealant and the second pressing plate are connected and fixed to the platform through bolts passing through the guiding ring.

[0009] By adopting the above technical solution, the sealant is fixed on the platform by bolts passing through the second pressing plate, so that the sealant will not be driven to shift under the movement of the sealing rod. The structure is simple and the operation is convenient.

[0010] Preferably, the second sealing mechanism includes a second cylinder, a mounting frame, a second telescopic end and a side sealing head. The structure of the side sealing head is consistent with the opening structure of the side hole of the product, and the side sealing head and the mounting frame form a telescopic structure through the second cylinder.

[0011] By adopting the above technical solution, the second sealing mechanism is started, and the second cylinder drives the side sealing head to seal the position on the side of the product that needs to be sealed.

[0012] Preferably, the positioning mechanism includes a fourth cylinder and a telescopic rod, and the outer diameter of the telescopic rod is consistent with the inner diameter of the external through hole of the product.

[0013] By adopting the above technical solution, after the product is placed at the detection position, the fourth cylinder is started to drive the telescopic rod to insert into the ear position through hole of the product, strengthening the product position fixing work and avoiding the displacement of the product when the product is pressed down subsequently.

[0014] Preferably, the limiting mechanism includes a limiting rod and a mounting block. The outer diameter of the limiting rod is equal to the inner diameter of the through hole, and there are two groups of limiting rods distributed.

[0015] By adopting the above technical solution, when the first pressing plate moves downward, the limiting rod under the limiting mechanism abuts against the detection frame to achieve the limiting purpose, so that the inner cavity sealing head on the first pressing plate reaches the specified position, and the sealing ring on the inner cavity sealing head contacts the upper end face of the product to seal the upper end face of the product.

[0016] Preferably, a detection frame is provided outside the platform. Through holes are provided on both sides of the top of the detection frame, and the top of the detection frame is connected to the third sealing mechanism through bolts.

[0017] By adopting the above technical solution, the third cylinder of the third sealing mechanism drives the movement of the first pressing plate installed on the connecting block, so that the limiting rod on the first pressing plate moves in the through hole of the detection frame, enabling the first pressing plate to move up and down smoothly within the detection frame for work.

[0018] Preferably, the third sealing mechanism includes a third cylinder and a connecting block. The connecting block is connected to the telescopic end of the third cylinder, and the other end of the connecting block is fixed to the top of the first pressing plate by screws.

[0019] By adopting the above technical solution, by loosening the screws connecting the connecting block and the first pressing plate, the first pressing plate can be disassembled from the third sealing mechanism, thereby facilitating the replacement of the inner cavity sealing head installed on the first pressing plate.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0021] 1. In the present utility model, through the cooperation of the first sealing mechanism, the second sealing mechanism, and the third sealing mechanism, the sealing actions can be simultaneously performed on the positions that need to be sealed on the upper end face, lower end face, and side face of the product. The leak detection method of this device is consistent with the position of the inner sealing wall during product assembly, avoiding the risk of air leakage from the end face not being detected.

[0022] 2. In the present utility model, through the setting of the conical surface of the sealing rod and the conical surface of the sealing glue, when performing the leak detection test on the inner cavity of the product, the first telescopic end of the first cylinder drives the sealing rod to move downward, so that the conical surface of the sealing rod and the conical surface of the sealing glue are mutually extruded, resulting in a good fitting effect between the inner wall of the product and the sealing glue, thereby enhancing its sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the schematic diagram of the overall structure in the present utility model;

[0024] Figure 2 is the schematic diagram of the internal cross-sectional structure of the first sealing mechanism in the present utility model;

[0025] Figure 3 is the enlarged schematic diagram of part A in the present utility model.

[0026] Legend Explanation:

[0027] 1. Detection frame; 2. First sealing mechanism; 201. First cylinder; 202. First telescopic end; 3. Platform; 4. Second sealing mechanism; 401. Second cylinder; 402. Mounting frame; 403. Second telescopic end; 5. Limiting mechanism; 501. Limiting rod; 502. Mounting block; 6. First pressing plate; 7. Third sealing mechanism; 701. Third cylinder; 702. Connecting block; 8. Positioning mechanism; 801. Fourth cylinder; 802. Expansion rod; 9. Product; 10. Second pressing plate; 11. Sealing glue; 12. Guide ring; 13. Sealing rod; 14. Sealing ring; 15. Inner cavity sealing head; 16. Side sealing head; 17. Movable opening. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0029] Refer to Figures 1-3 , an inner cavity sealing and leak detection device, including a platform 3, a first pressing plate 6, and a third sealing mechanism 7 for driving the movement of the first pressing plate 6. An activity port 17 is opened in the middle of the platform 3. A first sealing mechanism 2 is arranged below the activity port 17. The first sealing mechanism 2 includes a first cylinder 201, a first telescopic end 202, and a sealing rod 13. A guide ring 12 connected to the activity port 17 is arranged outside the sealing rod 13. A sealing glue 11 is installed on the guide ring 12. A second pressing plate 10 is arranged on the sealing glue 11. A product 9 is placed on the second pressing plate 10. An inner cavity sealing head 15 is arranged above the product 9. The top of the inner cavity sealing head 15 is connected to the bottom of the first pressing plate 6. A sealing ring 14 is clamped outside the inner cavity sealing head 15. Second sealing mechanisms 4 are arranged on both sides of the product 9. A positioning mechanism 8 is arranged on one side of the second sealing mechanism 4. Limiting mechanisms 5 are arranged on both sides of the first pressing plate 6.

[0030] By adopting the above technical solutions, the first sealing mechanism 2 drives the sealing rod 13 to move downward in the direction of the sealing glue 11, so that the conical surface of the sealing rod 13 and the conical surface of the sealing glue 11 are mutually extruded, enabling the inner wall of the product 9 to fit with the sealing glue 11, thereby achieving a sealing effect. At the same time, the second sealing mechanism 4 drives the side sealing head 16 to seal the detection position on the side of the product 9. The leak detection method of this structure is consistent with the sealing position of the assembled product 9, avoiding the risk that the leakage of the product 9 sealed from the end face by a general fixture cannot be detected.

[0031] Such as Figure 2As shown in the figure, the sealing rod 13 and the sealant 11 are in conical contact. The sealant 11 and the second pressing plate 10 are connected and fixed to the platform 3 through bolts passing through the guide ring 12.

[0032] By adopting the above technical solution, the sealant 11 is fixed on the platform 3 by bolts passing through the second pressing plate 10, so that the sealant 11 will not be driven to shift under the movement of the sealing rod 13. The structure is simple and the operation is convenient.

[0033] Furthermore, the second sealing mechanism 4 includes a second cylinder 401, a mounting bracket 402, a second telescopic end 403 and a side sealing head 16. The structure of the side sealing head 16 is consistent with the opening structure of the side hole of the product 9. The side sealing head 16 and the mounting bracket 402 form a telescopic structure through the second cylinder 401.

[0034] By adopting the above technical solution, through the setting of the second sealing mechanism 4, the second cylinder 401 of the second sealing mechanism 4 drives the side sealing head 16 to perform a sealing action towards the position on the side of the product 9 that needs to be sealed. The end face of the side sealing head 16 is a conical structure, making the side sealing effect of the product 9 better.

[0035] Specifically, the positioning mechanism 8 includes a fourth cylinder 801 and a telescopic rod 802. The outer diameter of the telescopic rod 802 is the same as the inner diameter of the external through hole of the product 9.

[0036] By adopting the above technical solution, after the product 9 is placed at the detection position, the fourth cylinder 801 is started to drive the telescopic rod 802 to insert into the ear position through hole of the product 9, strengthening the work of fixing the position of the product 9 and avoiding the phenomenon of displacement of the product 9 when the product 9 is pressed down subsequently.

[0037] As Figure 1 shown, the limiting mechanism 5 includes a limiting rod 501 and a mounting block 502. The outer diameter of the limiting rod 501 is equal to the inner diameter of the through hole, and there are two groups of limiting rods 501 distributed.

[0038] By adopting the above technical solution, when the first pressing plate 6 moves downward, the limiting rod 501 below the limiting mechanism 5 abuts against the detection frame 1 to achieve the limiting purpose, so that the inner cavity sealing head 15 on the first pressing plate 6 reaches the specified position, and the sealing ring 14 on the inner cavity sealing head 15 contacts the upper end face of the product 9 to perform a sealing action on the upper end face of the product 9.

[0039] As Figure 1 shown, a detection frame 1 is provided outside the platform 3. Through holes are provided on both sides of the top of the detection frame 1. The top of the detection frame 1 is connected to the third sealing mechanism 7 through bolts.

[0040] By adopting the above technical solution, the third cylinder 701 of the third sealing mechanism 7 drives the first pressing plate 6 installed on the connecting block 702 to move, so that the limiting rod 501 on the first pressing plate 6 moves in the through hole of the detection frame 1, enabling the first pressing plate 6 to move up and down stably within the detection frame 1. By connecting the detection frame 1 to an external air source device, the external air source device is connected to each cylinder on the detection frame 1 to provide a driving source for them, causing each cylinder to work and seal the sealing surface of the product 9.

[0041] Specifically, the third sealing mechanism 7 includes a third cylinder 701 and a connecting block 702. The connecting block 702 is connected to the telescopic end of the third cylinder 701, and the other end of the connecting block 702 is fixed to the top of the first pressing plate 6 by screws.

[0042] By adopting the above technical solution, by loosening the screws connecting the connecting block 702 and the first pressing plate 6, the first pressing plate 6 can be disassembled from the third sealing mechanism 7, thus facilitating the replacement of the inner cavity sealing head 15 installed on the first pressing plate 6. When the third cylinder 701 works, it can drive the first pressing plate 6 connected to the connecting block 702 to move up and down within the detection frame 1 to complete the sealing of the upper end surface of the product 9.

[0043] Working principle: When in use, first connect this device to an external air source device, and then place the product 9 to be detected at the detection position on the platform 3 inside the detection frame 1. Then, open the valves of the first cylinder 201, the second cylinder 401, and the third cylinder 701, so that the tapered surfaces of the sealing rod 13 connected to the first cylinder 201 and the sealing glue 11 are mutually extruded, making the inner wall of the product 9 fit with the sealing glue 11, enhancing the sealing effect between the product 9 and the sealing glue 11. Then, the side sealing head 16 connected to the second cylinder 401 seals the position on the side of the product 9 that needs to be sealed. The end face of the side sealing head 16 is of a tapered structure, making the side sealing effect of the product 9 better. Subsequently, the first pressing plate 6 and the inner cavity sealing head 15 connected to the third cylinder 701 seal the upper end surface of the product 9, and in cooperation with the sealing ring 14, making the sealing effect of the sealing surface of the upper end surface of the product 9 better. This structure makes the leak detection method consistent with the sealing position during the assembly of the product 9, avoiding the risk of air leakage from the end face not being detected.

[0044] The above is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent replacements or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. An internal cavity sealing leak detection device, comprising a platform, a first pressing plate, and a third sealing mechanism for driving the movement of the first pressing plate, characterized in that, An activity opening is provided in the middle of the platform. A first sealing mechanism is arranged below the activity opening. The first sealing mechanism includes a first cylinder, a first telescopic end portion and a sealing rod. A guide ring connected to the activity opening is arranged outside the sealing rod. A sealing rubber is installed on the guide ring. A second pressing plate is arranged on the sealing rubber. A product is placed on the second pressing plate. An inner cavity sealing head is arranged above the product. The top of the inner cavity sealing head is connected to the bottom of the first pressing plate. A sealing ring is clamped outside the inner cavity sealing head. Second sealing mechanisms are arranged on both sides of the product. A positioning mechanism is arranged on one side of each second sealing mechanism. Limiting mechanisms are arranged on both sides of the first pressing plate.

2. The internal cavity sealing leak detection device according to claim 1, wherein The sealing rod and the sealing rubber are in tapered surface contact. The sealing rubber and the second pressing plate are fixedly connected to the platform through bolts passing through the guide ring.

3. The internal cavity sealing leak detection device according to claim 1, characterized in that, Each second sealing mechanism includes a second cylinder, a mounting frame, a second telescopic end portion and a side sealing head. The structure of the side sealing head is consistent with the opening structure of the side hole of the product.

4. The internal cavity sealing leak detection device according to claim 1, characterized in that, The positioning mechanism includes a fourth cylinder and a telescopic rod. The outer diameter of the telescopic rod is consistent with the inner diameter of the external through hole of the product.

5. The internal cavity sealing leak detection device according to claim 1, characterized in that, The limiting mechanism includes limiting rods and mounting blocks. The outer diameter of each limiting rod is equal to the inner diameter of the through hole. There are two groups of limiting rods.

6. The internal cavity sealing leak detection device according to claim 1, wherein, A detection frame is arranged outside the platform. Through holes are arranged on both sides of the top of the detection frame. The top of the detection frame is connected to the third sealing mechanism through bolts.

7. An internal cavity sealing leak detection device according to claim 6, characterized in that, The third sealing mechanism includes a third cylinder and a connecting block. The connecting block is connected to the telescopic end portion of the third cylinder. The other end of the connecting block is fixedly connected to the top of the first pressing plate through screws.

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