A threaded multi-station leak detector linkage shaft structure

Abstract

This invention relates to the field of structural testing technology, and more particularly to a linkage shaft structure for a threaded multi-station leak tester. The structure includes a test chamber, on which a sealing test mechanism and a pH detection mechanism are mounted. The sealing test mechanism also includes a visual inspection mechanism. The sealing test mechanism comprises a control cabinet fixedly connected to one side of the top of the test chamber. An electric push rod is fixedly connected to the top of the inner wall of the control cabinet. A connecting plate is fixedly connected to the telescopic end of the electric push rod. A front side plate and a support frame are fixedly connected to both ends of the connecting plate, respectively. The front side plate and the support frame are fixedly connected. Multiple linkage shaft bodies are rotatably connected to the outer wall of the front side plate. This invention fundamentally avoids problems such as thread stripping, tooth breakage, and metal debris generation caused by forced alignment, thereby significantly reducing the scrap rate and rework rate of products caused by the testing process, and effectively ensuring the quality stability and consistency of the filters leaving the factory.

Description

Technical Field

[0001] This invention relates to the field of structural testing technology, and in particular to a threaded multi-station leak detector linkage shaft structure. Background Technology

[0002] In the manufacturing process of filters, sealing performance is a crucial quality indicator. If a filter has poor sealing, oil, water, or air leaks may occur during use. This not only causes the filter itself to lose its filtering function but may also cause serious damage to the entire system it is connected to (such as the engine or hydraulic system) and even lead to safety accidents.

[0003] Therefore, sealing testing of filter products is an indispensable part of their production process. The threaded leak tester is a specialized device designed to meet this testing requirement. Its core working principle is as follows: the filter to be tested (usually its cover or interface) is sealed to the test chamber or air / water source of the leak tester via a threaded connecting shaft. After connection, a certain pressure of gas or liquid is applied to the inside or outside of the filter, and pressure changes are monitored by pressure sensors to determine whether the filter's sealing performance is up to standard. The phrase "threaded connecting shaft as the center of rotation" refers to the fact that when achieving a threaded connection, the core component (connecting shaft) rotates fixedly around its own central axis to complete the tightening or loosening action.

[0004] In the technological development of threaded leak detectors for filter seal testing, the limitations of the drive shaft method have always been a key factor affecting testing accuracy and product protection effectiveness. Early and some existing automatic testing equipment commonly used a centralized drive scheme with ordinary motors. This involved a single motor, along with gears, belts, and other transmission mechanisms, simultaneously driving multiple drive shafts. However, ordinary motors lack real-time torque feedback and dynamic adjustment capabilities, making it impossible to precisely control the meshing force based on the thread characteristics of different products (such as material hardness, thread profile specifications, and assembly clearance). In centralized drive systems, the speed and torque of all drive shafts are synchronized, making it impossible to independently adjust the operating status of individual drive shafts. As filter production moves towards multi-specification and high-volume production, equipment driven by ordinary motors struggles to quickly switch between different product testing parameters (such as torque threshold and speed). Each model change requires manual adjustment of the mechanical transmission structure, which is cumbersome and time-consuming, failing to meet the flexible and efficient operational requirements of modern production lines. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by proposing a threaded multi-station leak detection machine linkage shaft structure.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a threaded multi-station leak tester linkage shaft structure, including a test box, wherein a sealing test mechanism and a pH detection mechanism are provided on the test box, and a visual inspection mechanism is provided on the sealing test mechanism;

[0007] The sealing test mechanism includes a control cabinet fixedly connected to one side of the top of the test chamber. An electric push rod is fixedly connected to the top of the inner wall of the control cabinet. A connecting plate is fixedly connected to the telescopic end of the electric push rod. A front side plate and a support frame are fixedly connected to both ends of the connecting plate, respectively. The front side plate and the support frame are fixedly connected. Multiple linkage shaft bodies are rotatably connected to the outer wall of the front side plate. Each linkage shaft body has an assembly cavity at one end. A connecting shaft is detachably connected to the inner wall of each assembly cavity. A spring is fixedly connected to one end of the inner side of each connecting shaft. Each spring is respectively set inside each assembly cavity. A threaded head is threadedly fixed to one end of the outer side of each connecting shaft. Each threaded head is used to perform a sealing test on each filter.

[0008] Preferably, the sealing test mechanism further includes a lifting structure symmetrically fixedly connected to the front end of the control cabinet, and a gripper structure is installed at the front end of the two control cabinets, the gripper structure being used to synchronously clamp each filter.

[0009] Preferably, the rear end of the support frame is fixedly connected to multiple servo motors, and the drive end of each servo motor is fixedly connected to each connecting shaft body. The front end of the support frame is fixedly connected to a grid plate, which is disposed on the front side of the inner wall of the test chamber.

[0010] Preferably, the visual inspection mechanism includes a horizontal plate fixedly connected to the top front end of the front side plate, a first groove is provided at the bottom end of the horizontal plate, a first screw is rotatably connected to one side of the inner wall of the first groove, a first motor is fixedly connected to one end of the horizontal plate, and the drive end of the first motor is fixedly connected to the first screw.

[0011] Preferably, the outer wall of the first screw is threadedly connected to a movable column that slides on the inner wall of the first groove. The bottom end of the movable column has a storage cavity. The top end of the storage cavity is fixedly connected to an electric cylinder. The telescopic end of the electric cylinder is fixedly connected to a lifting plate. The bottom end of the lifting plate is fixedly connected to a camera. The bottom end of the movable column is rotatably connected to two sides corresponding to the storage cavity. The top ends of the two sealing plates are symmetrically fixedly connected to ropes. Both sets of ropes are fixedly connected to the lifting plate.

[0012] Preferably, the pH detection mechanism includes a fixing block fixedly connected to the front side of the top of the test chamber. The fixing block has a circular hole, and a second sliding groove is formed on the inner wall of the circular hole. A second screw is rotatably connected to the bottom of the inner wall of the second sliding groove. A third motor is fixedly connected to the top of the fixing block on the side corresponding to the circular hole. The drive end of the third motor is fixedly connected to the second screw.

[0013] Preferably, a second slider is slidably connected to the inner wall of the second groove, the second slider is threadedly connected to a second screw, a circular plate is fixedly connected to one end of the second slider, and a pH electrode is rotatably passed through the circular plate, the shape of the circular plate and the circular hole are adapted to each other.

[0014] Preferably, a second gear is fixedly connected to the outer wall of the pH electrode, and a first gear is meshed with the outer diameter of the second gear. A second motor is fixedly connected to one side of the top of the circular plate, and the drive end of the second motor is fixedly connected to the first gear through a rotating shaft.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. By setting up a sealing test mechanism, problems such as thread stripping, tooth breakage, and metal shavings caused by forced alignment are fundamentally avoided, thereby significantly reducing the scrap rate and rework rate of products caused by the testing process. This effectively ensures the quality stability and consistency of the filters leaving the factory, and fully retains the core advantages of automated testing equipment in terms of high efficiency and continuous operation. Furthermore, its high adaptability further enhances the production applicability of the equipment and ensures the normal operation of the sealing test.

[0017] 2. With the pH detection mechanism in place, after pH detection, the pH electrode can be moved upwards. Then, through the cooperation of the second motor, the pH electrode is rotated. Centrifugal force can be used to shake off the water adhering to the pH electrode, thus quickly completing the cleaning effect and avoiding affecting the subsequent test results, ensuring the accuracy of the test results.

[0018] 3. With the visual inspection mechanism in place, when the filter enters the water, the first motor rotates the first screw, causing the camera to move back and forth and take pictures of the filter in the water to detect whether air bubbles are generated, thereby ensuring the sealing performance of the filter. Attached Figure Description

[0019] Figure 1 This is an overall structural diagram of the connecting shaft structure of a threaded multi-station leak detector according to the present invention;

[0020] Figure 2 This is another perspective view of the linkage shaft structure of the threaded multi-station leak detector of the present invention;

[0021] Figure 3 This is a sectional view of the control cabinet of the threaded multi-station leak detector linkage shaft structure of the present invention;

[0022] Figure 4 This is a structural diagram of the connecting shaft body of a threaded multi-station leak detector according to the present invention;

[0023] Figure 5 This is a transverse plate structure diagram of the linkage shaft structure of a threaded multi-station leak detector according to the present invention;

[0024] Figure 6 This is a cross-sectional view of the moving column of the connecting shaft structure of a threaded multi-station leak detector according to the present invention.

[0025] Figure 7 This is a structural diagram of the threaded head of the connecting shaft structure of a threaded multi-station leak detector according to the present invention;

[0026] Figure 8 This is a cross-sectional view of the fixing block of the connecting shaft structure of a threaded multi-station leak detector according to the present invention.

[0027] In the diagram: 1. Test box; 2. Horizontal plate; 3. Front side plate; 4. Control cabinet; 5. Lifting structure; 6. Gripper structure; 7. Filter; 8. Mesh plate; 9. Fixing block; 10. Threaded head; 11. Servo motor; 12. Support frame; 13. Electric push rod; 14. Connecting plate; 15. Linkage shaft body; 16. First slide groove; 17. Enclosed plate; 18. First motor; 19. Moving column; 20. First screw; 21. Storage cavity; 22. Lifting plate; 23. Rope; 24. Camera; 25. Electric cylinder; 26. Assembly cavity; 27. Spring; 28. Connecting shaft; 29. ​​Second motor; 30. Circular plate; 31. Second slider; 32. Second screw; 33. Second slide groove; 34. Third motor; 35. pH electrode; 36. Circular hole; 37. First gear; 38. Second gear. Detailed Implementation

[0028] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0029] like Figures 1-8The diagram shows a threaded multi-station leak tester linkage shaft structure, including a test chamber 1. The test chamber 1 is equipped with a sealing test mechanism and a pH detection mechanism. The sealing test mechanism is equipped with a visual inspection mechanism. The sealing test mechanism includes a control cabinet 4 fixedly connected to one side of the top of the test chamber 1. An electric push rod 13 is fixedly connected to the top of the inner wall of the control cabinet 4. A connecting plate 14 is fixedly connected to the telescopic end of the electric push rod 13. A front side plate 3 and a support frame 12 are fixedly connected to both ends of the connecting plate 14, respectively. The front side plate 3 and the support frame 12 are fixedly connected. Multiple linkage shaft bodies 15 are rotatably connected to the outer wall of the front side plate 3. Each linkage shaft body 15 has an assembly cavity 26 at one end. A connecting shaft 28 is detachably connected to the inner wall of each assembly cavity 26. A spring 27 is fixedly connected to one end of the inner side of each connecting shaft 28. Each spring 27 is respectively set inside each assembly cavity 26. A threaded head 10 is threadedly fixedly connected to one end of the outer side of each connecting shaft 28. Each threaded head 10 is used to perform a sealing test on each filter 7. The core function of the threaded head 10 is to form a detachable connection with the filter 7 through its own threaded structure, providing a basic force point for the sealing effect. It is the direct execution component for achieving the sealing function. The connecting shaft 28 serves as an intermediate transmission and connection carrier. Its top is fixed to the threaded head 10 through threaded engagement, and its tail is assembled with the spring 27. It also has a positioning pin hole corresponding to the connecting shaft body 15. It undertakes multiple functions of "connecting the threaded head 10 - transmitting elastic force - cooperating for positioning and fixing". The spring 27 provides elastic buffering and reset power. Its elastic characteristics are the core power source for the small-amplitude swing of the connecting shaft body 15. At the same time, it can offset the vibration and impact during operation. The connecting shaft body 15 is an overall support and mounting base. The internal space is reserved for the assembly of the spring 27 and the connecting shaft 28. It is fixed to the connecting shaft 28 through the positioning pin hole, providing a stable mounting base for the entire assembly.

[0030] like Figure 1 , Figure 2 As shown, the sealing test mechanism also includes a lifting structure 5 symmetrically fixedly connected to the front end of the control cabinet 4. The front ends of both control cabinets 4 are equipped with gripper structures 6, which are used to synchronously clamp each filter 7. The gripper structures 6 can move back and forth, allowing the filter 7 to be installed on the threaded head 10 during installation.

[0031] like Figure 3 , Figure 4As shown, multiple servo motors 11 are fixedly connected to the rear end of the support frame 12. The drive end of each servo motor 11 is fixedly connected to each connecting shaft body 15. A mesh plate 8 is fixedly connected to the front end of the support frame 12, and the mesh plate 8 is set on the front side of the inner wall of the test chamber 1. Each connecting shaft body 15 is equipped with a servo driver, replacing the traditional centralized drive scheme. The servo system has high-precision position control and torque feedback capabilities, and can monitor and adjust the speed, direction, and output torque of the drive shaft in real time. Compared with traditional mechanical drive, the control precision is improved by an order of magnitude, ensuring the smoothness and controllability of the thread meshing process.

[0032] like Figure 4 , Figure 5 As shown, the visual inspection mechanism includes a horizontal plate 2 fixedly connected to the top front end of the front side plate 3. A first groove 16 is formed at the bottom of the horizontal plate 2. A first screw 20 is rotatably connected to one side of the inner wall of the first groove 16. A first motor 18 is fixedly connected to one end of the horizontal plate 2, and the drive end of the first motor 18 is fixedly connected to the first screw 20. The first motor 18 drives the first screw 20 to rotate, and the threaded effect of the first screw 20 causes the moving column 19 to move back and forth.

[0033] like Figure 5 , Figure 6 As shown, a movable column 19, which slides along the inner wall of the first slide groove 16, is threaded onto the outer wall of the first screw 20. A storage cavity 21 is formed at the bottom of the movable column 19. An electric cylinder 25 is fixedly connected to the top of the storage cavity 21. A lifting plate 22 is fixedly connected to the telescopic end of the electric cylinder 25. A camera 24 is fixedly connected to the bottom of the lifting plate 22. Sealing plates 17 are rotatably connected to both sides of the storage cavity 21 at the bottom of the movable column 19. Ropes 23 are symmetrically fixedly connected to the tops of the two sealing plates 17, and both sets of ropes 23 are fixedly connected to the lifting plate 22. Before testing, the camera 24 is retracted into the storage cavity 21 to prevent water from splashing onto the lens of the camera 24 during shaking, thus preventing any impact on subsequent test results.

[0034] like Figure 2 , Figure 8As shown, the pH detection mechanism includes a fixed block 9 fixedly connected to the front of the top of the test chamber 1. A circular hole 36 is provided on the fixed block 9. A second sliding groove 33 is opened on the inner wall of the circular hole 36. A second screw 32 is rotatably connected to the bottom of the inner wall of the second sliding groove 33. A third motor 34 is fixedly connected to the top of the fixed block 9 on one side corresponding to the circular hole 36. The driving end of the third motor 34 is fixedly connected to the second screw 32. A second slider 31 is slidably connected to the inner wall of the second sliding groove 33. The second slider 31 is threadedly connected to the second screw 32. A circular plate 30 is fixedly connected to one end of the second slider 31. A pH electrode 35 rotatably passes through the circular plate 30. The circular plate 30 and the circular hole 36 are matched in shape. A second gear 38 is fixedly connected to the outer wall of the pH electrode 35. A first gear 37 is meshed with the outer diameter of the second gear 38. A second motor 29 is fixedly connected to one side of the top of the circular plate 30. The driving end of the second motor 29 is fixedly connected to the first gear 37 through a rotating shaft.

[0035] Working principle: First, the filter 7 is placed on the mounting bracket on the mesh plate 8. Then, the lifting structure 5 pushes the gripper structure 6 downward until the grippers of the gripper structure 6 reach both sides of the filter 7, thus clamping and fixing the filter 7. Next, the servo motor 11 is started to rotate the connecting shaft body 15. Since the pin of the connecting shaft 28 is installed inside the assembly cavity 26, it can rotate the connecting shaft 28. The connecting shaft 28 rotates the threaded head 10, and then the gripper structure 6 moves towards the control cabinet 4, thereby moving the filter 7 towards the threaded head 10. Therefore, through the thread effect, the threaded head 10 is slowly inserted into the filter 7. At this point, the filter 7 is released, and the connecting plate 14 is pushed downward by the electric push rod 13, thereby moving the front side plate 3 and the support frame 12 downward, so that the filter 7 is immersed in water and the sealing performance of the filter 7 is tested in water. Due to the presence of the spring 27, its elastic characteristics are the core power source for the small-amplitude swing of the connecting shaft body 15, and at the same time, it can offset the vibration and impact during operation, fundamentally avoiding problems such as thread stripping, tooth breakage, and metal shavings caused by forced alignment, thereby significantly reducing the scrap rate and rework rate of the product caused by the inspection process, and effectively ensuring the quality stability and consistency of the filter 7 leaving the factory.

[0036] After the filter 7 enters the water, wait for the water surface to calm down. Then, start the electric cylinder 25 to push the lifting plate 22 downward and open the sealing plate 17, so that the camera 24 can be exposed. The lifting plate 22 limits the sealing plate 17. Then, start the first motor 18 to rotate the first screw 20. The thread effect of the first screw 20 causes the moving column 19 to move back and forth, so as to detect whether there are air bubbles in the water. Therefore, the sealing performance of the filter 7 can be obtained.

[0037] During testing, the third motor 34 is activated to rotate the second screw 32. The threaded effect of the second screw 32 causes the second slider 31 to move downwards, which in turn moves the circular plate 30 downwards, allowing the pH electrode 35 to be inserted into the water for pH measurement. After the measurement is completed, the third motor 34 moves the pH electrode 35 upwards, and then the second motor 29 is activated to rotate the first gear 37. The first gear 37 then rotates the second gear 38, which in turn rotates the pH electrode 35. Centrifugal force is used to shake off the water adhering to the bottom of the pH electrode 35, thus quickly completing the cleaning operation, improving the cleaning effect, facilitating the next test, and ensuring the accuracy of the next test results.

[0038] After the test is completed, the filter 7 is moved upward and clamped and fixed again by the gripper structure 6. Then, the servo motor 11 is started and the gripper structure 6 is moved away from the control cabinet 4, so that the filter 7 is disengaged from the threaded head 10, which is convenient for the next sealing performance test.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A threaded multi-station leak testing machine linkage shaft structure, comprising a test box (1), characterized in that: The test chamber (1) is equipped with a sealing test mechanism and a pH detection mechanism, and the sealing test mechanism is equipped with a visual inspection mechanism; The sealing test mechanism includes a control cabinet (4) fixedly connected to one side of the top of the test box (1). An electric push rod (13) is fixedly connected to the top of the inner wall of the control cabinet (4). A connecting plate (14) is fixedly connected to the telescopic end of the electric push rod (13). A front side plate (3) and a support frame (12) are fixedly connected to both ends of the connecting plate (14). The front side plate (3) and the support frame (12) are fixedly connected. A plurality of linkage shaft bodies (15) are rotatably connected to the outer wall of the front side plate (3). An assembly cavity (26) is opened at one end of each linkage shaft body (15). A connecting shaft (28) is detachably connected to the inner wall of each assembly cavity (26). A spring (27) is fixedly connected to one end of the inner side of each connecting shaft (28). Each spring (27) is respectively set inside each assembly cavity (26). A threaded head (10) is threadedly fixed to one end of the outer side of each connecting shaft (28). Each threaded head (10) is used to perform a sealing test on each filter (7).

2. The thread type multi-station leak hunting machine connecting shaft structure according to claim 1, characterized in that: The sealing test mechanism also includes a lifting structure (5) symmetrically fixedly connected to the front end of the control cabinet (4), and a gripper structure (6) is installed at the front end of the two control cabinets (4). The gripper structure (6) is used to synchronously clamp each filter (7).

3. The thread type multi-station leak hunting machine connecting shaft structure according to claim 1, characterized in that: The support frame (12) is fixedly connected to a plurality of servo motors (11) at its rear end. The drive end of each servo motor (11) is fixedly connected to each connecting shaft body (15). The support frame (12) is fixedly connected to a grid plate (8) at its front end. The grid plate (8) is set on the front side of the inner wall of the test box (1).

4. The thread type multi-station leak hunting machine connecting shaft structure according to claim 1, characterized in that: The visual inspection mechanism includes a horizontal plate (2) fixedly connected to the top of the front end of the front side plate (3). A first groove (16) is provided at the bottom end of the horizontal plate (2). A first screw (20) is rotatably connected to one side of the inner wall of the first groove (16). A first motor (18) is fixedly connected to one end of the horizontal plate (2). The drive end of the first motor (18) and the first screw (20) are fixedly connected.

5. The thread type multi-station leak hunting machine connecting shaft structure according to claim 4, characterized in that: The outer wall of the first screw (20) is threaded with a movable column (19) that slides on the inner wall of the first slide groove (16). The bottom end of the movable column (19) is provided with a storage cavity (21). The top end of the storage cavity (21) is fixedly connected with an electric cylinder (25). The telescopic end of the electric cylinder (25) is fixedly connected with a lifting plate (22). The bottom end of the lifting plate (22) is fixedly connected with a camera (24). The bottom end of the movable column (19) is rotatably connected with a sealing plate (17) on both sides of the storage cavity (21). The top ends of the two sealing plates (17) are symmetrically fixedly connected with ropes (23). Both sets of ropes (23) are fixedly connected to the lifting plate (22).

6. The thread type multi-station leak hunting machine connecting shaft structure according to claim 1, characterized in that: The pH detection mechanism includes a fixed block (9) fixedly connected to the front side of the top of the test box (1). A circular hole (36) is provided on the fixed block (9). A second groove (33) is provided on the inner wall of the circular hole (36). A second screw (32) is rotatably connected to the bottom of the inner wall of the second groove (33). A third motor (34) is fixedly connected to the top of the fixed block (9) on one side corresponding to the circular hole (36). The drive end of the third motor (34) is fixedly connected to the second screw (32).

7. The threaded multi-station leak detector linkage shaft structure according to claim 6, characterized in that: The inner wall of the second slide groove (33) is slidably connected to a second slider (31), the second slider (31) is threadedly connected to a second screw (32), and a circular plate (30) is fixedly connected to one end of the second slider (31). A PH electrode (35) is rotatably passed through the circular plate (30), and the circular plate (30) and the circular hole (36) are matched in shape.

8. The threaded multi-station leak detector linkage shaft structure according to claim 7, characterized in that: The outer wall of the PH electrode (35) is fixedly connected to a second gear (38), and the outer diameter of the second gear (38) is meshed with a first gear (37). The top side of the circular plate (30) is fixedly connected to a second motor (29), and the driving end of the second motor (29) is fixedly connected to the first gear (37) through a rotating shaft.

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