An automobile part sealing performance detection device

Abstract

The utility model relates to the technical field of automobile part sealing performance detection, specifically relates to a kind of automobile part sealing performance detection device, including workbench, the top of workbench is fixedly connected with detection frame, the top of detection frame is fixedly connected with slide rail, the top of slide rail is slidably connected with bearing base, the bottom of bearing base is provided with the slide rail groove of sliding in the outer wall of the top of slide rail, so that in horizontal direction stable sliding, the top of bearing base is placed with gear box casing, the both sides of gear box casing are provided with first through-hole, the top of first through-hole is provided with three second through-holes.Compared with prior art, the application avoids the problem of incomplete block bonding caused by inaccurate manual alignment, and after detection is completed, the workpiece can automatically exit the detection area, making it easy to take and significantly reducing the worker's operating strength, making the overall detection process continuous and efficient, and significantly improving the production line tempo.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts sealing performance testing technology, and in particular to an automotive parts sealing performance testing device. Background Technology

[0002] In the production and assembly of automotive parts, especially gearbox housings, it is necessary to test the sealing performance of their internal cavities to ensure that there will be no gas or liquid leakage during operation. Traditional testing methods typically involve immersion testing in a water tank. This involves plugging any potential leaks in the gearbox, placing the entire gearbox inside a water tank, and then pressurizing it with gas. The presence of bubbles in the water is then observed to determine if there is a leak.

[0003] However, the above-mentioned traditional testing methods have obvious shortcomings. First, the workpiece needs to be manually sealed to ensure that the plug can accurately block the corresponding holes. This process relies on manual operation, which has problems such as low efficiency, high labor intensity and high requirements for operational precision. If the plug is not aligned, it will easily lead to incomplete sealing and affect the accuracy of the test results. At the same time, after manual sealing, the gearbox needs to be moved to the testing area in the water tank for testing, which not only increases the number of operation steps, but also further increases the labor intensity of manual labor.

[0004] In addition, the traditional water tank immersion testing method requires a large amount of clean water as the testing medium. After the water tank is used frequently, the water source needs to be replaced regularly, which not only wastes water resources but also increases the maintenance costs of enterprises, thereby reducing the overall testing efficiency. Due to the complexity of the testing process, more time and manpower are required, resulting in low overall testing efficiency, which makes it difficult to meet the needs of modern automotive parts production lines for fast and efficient testing. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a device for testing the sealing performance of automotive parts, so as to solve the problem that the traditional water tank immersion test method has a complicated testing process, requires more time and manpower, and results in low overall testing efficiency, making it difficult to meet the problem of fast and efficient testing in modern automotive parts production lines.

[0006] Based on the above objectives, this utility model provides a device for testing the sealing performance of automotive parts, including a workbench. A testing frame is fixedly connected to the top of the workbench, and a slide rail is fixedly connected to the top of the testing frame. A support base is slidably connected to the top of the slide rail. The bottom of the support base has a slide rail groove that slides on the outer wall of the top of the slide rail, allowing for stable sliding in the horizontal direction. A gearbox housing is placed on the top of the support base. A first through hole is opened on both sides of the gearbox housing. Three second through holes are opened at the top of the first through holes. Testing components for blocking the first and second through holes to perform airtightness testing are provided on both sides of the testing frame. The testing components include four first cylinders fixedly connected to the outer walls of both sides of the testing frame, and the four first cylinders are arranged in pairs facing each other. One end of the first cylinder penetrates into the inner wall of the testing frame and is fixedly connected to a first blocking block for blocking the first through hole. A pressure sensor is fixedly installed on the side wall of the first blocking block near the first through hole.

[0007] The testing frame is equipped with a material transfer assembly, which is used to move the gearbox housing on the top of the support base into or out of the working area inside the testing frame. The material transfer assembly includes a movable plate fixedly connected to the two side walls of the support base. The two movable plates are relatively inclined, and the top of the two movable plates is provided with a sliding groove.

[0008] Preferably, a second cylinder is fixedly connected to the top of the testing frame. The output end of the second cylinder passes through the inner wall of the testing frame and is fixedly connected to a force distribution plate. The force distribution plate has a triangular shape. A lower pressure plate is fixedly connected to the bottom of the force distribution plate. The force distribution plate is used to evenly distribute the pressure generated by the second cylinder and apply it to the lower pressure plate. Three second blocking blocks are fixedly installed at the bottom of the lower pressure plate. The three second blocking blocks are respectively located in the vertical direction of the three second through holes.

[0009] Preferably, the second block located in the middle position is provided with a connecting hole, the top of which is connected to an air inlet pipe for supplying gas to the inside of the gearbox housing, and a leak meter is fixedly installed on the top of the workbench near the side wall of the testing frame.

[0010] Preferably, a linkage rod is fixedly connected to the side wall of the first cylinder on the side away from the detection frame, near the first block. A sliding sleeve is fixedly connected to the bottom end of the linkage rod, and the outer wall of the sliding sleeve slides between the inner walls of the sliding groove.

[0011] Preferably, limiting posts are fixedly connected to both sides of the support base. The limiting posts are located on both sides of the gearbox housing and are used to laterally limit the gearbox housing placed on top of the support base.

[0012] Preferably, the top of the support base is provided with a placement groove, the inner wall of the placement groove is adapted to one end of the gearbox housing, and the placement groove is used to vertically limit the gearbox housing.

[0013] Preferably, the side of the first plug near the first through hole and the side of the second plug near the second through hole are both fixedly connected with sealing rings for tight fit.

[0014] The beneficial effects of this utility model are:

[0015] 1. This automotive parts sealing performance testing device, through a linkage structure between the testing component and the material transfer component, and the coordinated operation of the first cylinder, linkage rod, sliding sleeve, and tilting moving plate, enables the feeding mechanism to automatically feed the workpiece to the testing position simultaneously during the plugging of gearbox leak holes. This achieves coordinated plugging and feeding, significantly improving the testing cycle time. After the airtightness test is completed, the linkage structure can also reverse to drive the material transfer component to automatically remove the workpiece from the testing area, replacing the traditional method of manually plugging holes and transporting them to the testing position. The support base guides the workpiece on the slide rail, allowing it to enter the testing area quickly and accurately, avoiding the problem of incomplete plug fit caused by manual misalignment. Furthermore, after testing, the workpiece can automatically exit the testing area for easy retrieval, greatly reducing worker workload. This automatic alignment and material handling structure shortens the preparation time before testing, making the overall testing process continuous and efficient, and significantly improving the production line cycle time.

[0016] 2. This automotive parts sealing performance testing device seals the first and second through holes using a first and second blocking block in the testing assembly, creating a sealed space inside the gearbox housing. Compressed air is then injected into the workpiece via an air intake pipe, and real-time pressure monitoring is achieved using a pressure sensor and a leak meter. This constitutes a precise airtightness testing structure, completely replacing the water tank immersion method. This testing method requires no water resources, avoiding the cost waste of frequent water changes and eliminating the problem of air bubbles interfering with visual judgment. Even minute leaks can be accurately identified. Pressure changes are displayed digitally, improving testing stability and repeatability. Furthermore, the device can complete testing in a very short time, significantly improving testing efficiency. This solution makes sealing performance assessment more reliable, meeting the needs of modern production lines for rapid and high-precision testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the testing frame of this utility model;

[0020] Figure 3 This is a schematic diagram of the force distribution plate and pressure sensor structure of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the first and second blocking blocks of this utility model;

[0022] Figure 5 This is a three-dimensional structural diagram of the movable plate and linkage rod of this utility model;

[0023] Figure 6 This is a schematic diagram of the moving trajectory structure of the movable plate and the supporting base of this utility model.

[0024] The diagram is marked as follows:

[0025] 1. Workbench; 2. Testing frame; 3. Slide rail; 4. Support base; 5. Slide rail groove; 6. Placement groove; 7. Gearbox housing; 8. First through hole; 9. Second through hole; 10. First cylinder; 11. First block; 12. Second cylinder; 13. Force distribution plate; 14. Lower pressure plate; 15. Second block; 16. Sealing ring; 17. Connecting hole; 18. Air inlet pipe; 19. Pressure sensor; 20. Leakage meter; 21. Moving plate; 22. Slide groove; 23. Linkage rod; 24. Sliding sleeve; 25. Limiting post. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] like Figures 1 to 6 As shown, an automotive parts sealing performance testing device includes a workbench 1, a testing frame 2 fixedly connected to the top of the workbench 1, a slide rail 3 fixedly connected to the top of the testing frame 2, a support base 4 slidably mounted on the top of the slide rail 3, a slide rail groove 5 adapted to the top outer wall of the slide rail 3 at the bottom of the support base 4, so that the support base 4 can slide stably in the horizontal direction along the slide rail 3, a placement groove 6 is provided on the top of the support base 4, the inner wall shape of the placement groove 6 matches one end of the gearbox housing 7, used to vertically limit the gearbox housing 7 so that it will not shake after placement, and improve the accuracy of subsequent plug fitting; first through holes 8 are provided on both sides of the gearbox housing 7, and three second through holes 9 are provided on the top of the first through holes 8;

[0029] The testing frame 2 is symmetrically equipped with testing components for blocking the first through hole 8 and the second through hole 9 on both sides. The testing components include four first cylinders 10 set on the outer walls of both sides of the testing frame 2, arranged in pairs opposite each other. Each pair of two first cylinders 10 is located on the left and right sides of the testing frame 2. When the first cylinder 10 is working, its output end passes through the inner wall of the testing frame 2 and is fixedly connected to the first blocking block 11. The first blocking block 11 is used to fit and block the corresponding first through hole 8. In order to improve the detection sensitivity, a pressure sensor 19 is fixedly installed on the side wall of the first blocking block 11 near the first through hole 8. The pressure sensor 19 is used to detect the air pressure change near the first blocking block 11 in real time, so as to help determine whether the blocking block fits properly or whether there is a small leak in the seal when testing the air tightness, thereby improving the accuracy of the test. The contact surfaces of the first blocking block 11 and the first through hole 8 are fitted with sealing rings 16. The sealing rings 16 are made of wear-resistant rubber material. Its flexible characteristics can automatically adapt to the small deformation of the hole wall at the moment of contact, so as to make the sealing effect better.

[0030] A second cylinder 12 is fixedly connected to the top of the testing frame 2. The output end of the second cylinder 12 passes through the interior of the testing frame 2 and is fixedly connected to a force distribution plate 13. A lower pressure plate 14 is fixedly installed at the bottom of the force distribution plate 13. The force distribution plate 13 is triangular in shape. The force distribution plate 13 can evenly distribute the pressure generated by the second cylinder 12 to the entire bottom surface of the lower pressure plate 14, thereby ensuring that the three sets of second blocking blocks 15 are subjected to consistent force when pressed down, and avoiding micro-leakage in the sealing space due to insufficient fit of one of the blocking blocks. Three second blocking blocks 15 are fixedly installed at the bottom of the lower pressure plate 14. A connecting hole 17 is opened directly above the three middle second through holes 9 of the three second blocking blocks 15. An air inlet pipe 18 is connected to the top of the connecting hole 17. The air inlet pipe 18 is used to introduce external air into the air supply system. Compressed air supplied by the air compressor is introduced into the gearbox housing 7, thus forming a sealed cavity for airtightness testing. A pressure sensor 19 is electrically connected to a leak detector 20 located on the top of the workbench 1. The pressure sensor 19 transmits the detected pressure signal to the leak detector 20, which processes and displays the signal. When a specified air pressure is introduced into the gearbox housing 7 through the air inlet pipe 18, the leak detector 20 simultaneously records the initial pressure. The leak detector 20 uses a differential pressure leak detector and continuously receives real-time pressure change data from the pressure sensor 19 throughout the testing cycle. If the pressure drop remains constant within the specified testing time, the gearbox housing 7 is deemed airtight; otherwise, a leak is detected.

[0031] The inspection frame 2 is equipped with a material transfer assembly, which consists of two movable plates 21 fixed on the side walls of the support base 4. The two movable plates 21 are arranged at opposite inclinations, and each of them has a sliding groove 22 on its top. When the first cylinder 10 is activated, its output end drives the first block 11 and also drives the bottom sleeve 24 of the linkage rod 23 to slide in the sliding groove 22 through the fixedly connected linkage rod 23. Since the movable plate 21 is an inclined structure, when the sleeve 24 slides in the sliding groove 22 along the axial direction, it will generate a guiding force along the inclined direction, so that the movable plate 21 and the support base 4 will be synchronously displaced, so that the support base 4 can automatically move from the workpiece placement position b to the inspection position a inside the inspection frame 2 for automatic loading and alignment. It can also move from point a to point b for easy workpiece retrieval without manual intervention from the operator. Limiting posts 25 are fixedly connected to both sides of the support base 4. The limiting posts 25 are located on both sides of the gearbox housing 7 and are used to limit the workpiece laterally to prevent the workpiece from tilting or shifting during the movement of the support base 4, which would make it difficult to accurately align the block.

[0032] The working process of this device is as follows: First, one end of the gearbox housing 7 is placed in the placement groove 6 of the bearing base 4. Since the structure of the placement groove 6 fits the workpiece, it is kept stable by vertical limiting. Then, one of the first cylinders 10 on both sides of the detection frame 2 is activated. When the output end of the first cylinder 10 extends, it not only drives the first block 11 to move towards the first through hole 8, but also drives the linkage rod 23 to move simultaneously. The linkage rod 23 cooperates with the inclined slide groove 22 through the sliding sleeve 24, so that the moving plate 21 slides along the inclined direction. The moving plate 21 further drives the bearing base 4 along the inclined direction. The slide rail 3 moves, thereby enabling the gearbox housing 7 to automatically enter the detection position. After the support base 4 enters the detection frame 2, the first cylinder 10 of the group continues to move forward, so that the first block 11 is attached to the outer wall of the first through hole 8. The sealing ring 16 flexibly fits the edge of the through hole to ensure good sealing. Then, another set of first cylinders 10 is activated, so that the corresponding first block 11 on the other side is attached to the first through hole 8 on the other side to complete the sealing. Therefore, the movement trajectory of the support base 4 moves from the part removal position b to the detection position a, without the need for manual alignment and sealing.

[0033] After sealing is completed, the second cylinder 12 is activated. The output end of the second cylinder 12 drives the force distribution plate 13 and the lower pressure plate 14 to move downward. Since the force distribution plate 13 can evenly transmit pressure to the lower pressure plate 14, the three second blocking blocks 15 are pressed against the second through hole 9 with consistent pressure. Each of the three second blocking blocks 15 is equipped with a sealing ring 16, which enables them to form a reliable seal at the second through hole 9 at different heights. The simultaneous sealing of the three points can completely form a sealed cavity inside the internal space. At this time, compressed air is injected into the air intake pipe 18 through the external air filling device. The gas enters the gearbox housing 7 through the connecting hole 17. The body is now in a fully sealed state, and the internal air pressure will rise and remain stable. A leak meter 20 is installed on the top of the workbench 1 near the side wall of the testing frame 2. The leak meter 20 is electrically connected to the pressure sensor 19 to monitor the pressure changes inside the shell in real time. When the internal pressure remains unchanged within the detection time, the workpiece is considered to have qualified sealing performance. If the pressure value continues to drop and the drop exceeds the allowable threshold set by the leak meter 20, it is determined that the workpiece has a leak. In this embodiment, the pressure monitoring method eliminates the need for a water tank, avoids visual judgment errors, and can accurately display minute leaks, making the detection more sensitive.

[0034] After the test is completed, the first cylinder 10 and the second cylinder 12 are controlled to retract their output ends, causing the first block 11 and the second block 15 to leave the outer walls of the first through hole 8 and the second through hole 9 at the same time. When the first cylinder 10 retracts, it drives the linkage rod 23 to move outward, causing the two sliding sleeves 24 to slide in opposite directions in the inclined slide groove 22, which further drives the moving plate 21 and the bearing base 4 to move from the test position a point back to the part removal position b point, so that the staff can directly remove the gearbox housing 7 that has been tested, realize automatic feeding and automatic discharging, avoid the problems of inaccurate manual alignment and high labor intensity caused by manual handling, and improve the testing efficiency.

[0035] In summary, this device, through the coordinated operation of the first cylinder 10, the second cylinder 12, the linkage rod 23, the sliding sleeve 24, the moving plate 21, and the slide rail 3, achieves automatic workpiece conveying and positioning, as well as multi-point synchronous sealing. Furthermore, it facilitates easy removal after testing. High-precision airtightness testing is achieved through the pressure sensor 19 and the leak meter 20. This technical solution eliminates the traditional manual plugging and water tank soaking steps, significantly reducing labor intensity and water waste, while simultaneously achieving rapid, automated, and accurate sealing testing, thus significantly improving testing efficiency and reliability.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0037] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for testing the sealing performance of automotive parts, comprising a workbench (1), wherein a testing frame (2) is fixedly connected to the top of the workbench (1), characterized in that: The top of the testing frame (2) is fixedly connected to a slide rail (3), and the top of the slide rail (3) is slidably connected to a support base (4). The bottom of the support base (4) is provided with a slide rail groove (5) that slides on the outer wall of the top of the slide rail (3) to allow for stable sliding in the horizontal direction. A gearbox housing (7) is placed on the top of the support base (4). The gearbox housing (7) has first through holes (8) on both sides. The top of the first through holes (8) has three second through holes (9). The sides of the testing frame (2) are provided with holes for blocking the first through holes. A detection assembly for airtightness testing of through hole (8) and second through hole (9) includes a first cylinder (10) fixedly connected to the outer walls of both sides of the detection frame (2). There are four first cylinders (10), and the four first cylinders (10) are arranged in pairs facing each other. One end of the first cylinder (10) is inserted into the inner wall of the detection frame (2) and fixedly connected to a first blocking block (11) for blocking the first through hole (8). A pressure sensor (19) is fixedly installed on the side wall of the first blocking block (11) near the first through hole (8). The inside of the testing frame (2) is provided with a material transfer assembly. The material transfer assembly is used to drive the gearbox housing (7) on the top of the support base (4) into or out of the working area inside the testing frame (2). The material transfer assembly includes a movable plate (21) fixedly connected to the side walls of both sides of the support base (4). The two movable plates (21) are relatively inclined, and the top of the two movable plates (21) is provided with a sliding groove (22).

2. The automotive parts sealing performance testing device according to claim 1, characterized in that, The top of the testing frame (2) is fixedly connected to a second cylinder (12). The output end of the second cylinder (12) passes through the inner wall of the testing frame (2) and is fixedly connected to a force distribution plate (13). The force distribution plate (13) is triangular in shape. The bottom of the force distribution plate (13) is fixedly connected to a lower pressure plate (14). The force distribution plate (13) is used to evenly distribute the pressure generated by the second cylinder (12) and apply it to the lower pressure plate (14). The bottom of the lower pressure plate (14) is fixedly installed with three second blocking blocks (15). The three second blocking blocks (15) are respectively located in the vertical direction of the three second through holes (9).

3. The automotive parts sealing performance testing device according to claim 2, characterized in that, The second block (15) located in the middle position is provided with a connecting hole (17), and the top of the connecting hole (17) is connected to an air inlet pipe (18) for supplying gas to the inside of the gearbox housing (7). A leak meter (20) is fixedly installed on the top of the workbench (1) near the side wall of the detection frame (2).

4. The automotive parts sealing performance testing device according to claim 3, characterized in that, A linkage rod (23) is fixedly connected to the side wall of the first cylinder (10) on the side away from the detection frame (2) near the first block (11). A sliding sleeve (24) is fixedly connected to the bottom end of the linkage rod (23). The outer wall of the sliding sleeve (24) slides between the inner walls of the slide groove (22).

5. The automotive parts sealing performance testing device according to claim 1, characterized in that, Both sides of the support base (4) are fixedly connected with limiting posts (25). The limiting posts (25) are located on both sides of the gearbox housing (7) and are used to laterally limit the gearbox housing (7) placed on top of the support base (4).

6. The automotive parts sealing performance testing device according to claim 1, characterized in that, The top of the support base (4) is provided with a placement groove (6), the inner wall of the placement groove (6) is adapted to one end of the gearbox housing (7), and the placement groove (6) is used to vertically limit the gearbox housing (7).

7. The device for testing the sealing performance of automotive parts according to claim 2, characterized in that, Both the side of the first plug (11) near the first through hole (8) and the side of the second plug (15) near the second through hole (9) are fixedly connected with sealing rings (16) for tight fit.

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