Auxiliary detection device for filter

Abstract

The utility model provides an auxiliary detection device for a filter. The auxiliary detection device comprises a frame, a sealing disc assembly, a main shaft, a lifting plate, a lifting driving mechanism and the like. The device drives the lifting plate to move through the lifting driving mechanism, synchronously drives all the main shafts to move downwards, realizes sealing of the lower end face of the filter, ensures uniform stress during testing, and improves the testing accuracy and efficiency. The lifting driving mechanism adopts the design of a rolling piece, an air cylinder and a reset spring, and stable and rapid lifting is achieved. The main shaft is provided with an air inlet channel, the threaded connecting piece is provided with an air outlet channel, an air flow path line is simplified, and the leakage risk is reduced. And the sealing disc assembly adopts a Y-shaped sealing ring, so that the sealing performance is ensured. The main shaft driving mechanism adopts a servo motor and gear transmission to realize synchronous rotation of the main shaft. The device is reasonable in design, and the efficiency and accuracy of air tightness detection of the filter are effectively improved.

Description

Technical Field

[0001] The utility model particularly relates to a filter auxiliary detection device. Background Art

[0002] As an important engine component, the performance of the filter not only determines the reliability and life of the engine, but also has a significant impact on the engine's power, economy and emission performance. Its structure includes components such as the shell, cover, and paper core in the cavity, and the connection strength and sealing performance must be guaranteed; the purpose of filter leak detection is to detect the airtightness of the filter, which is directly related to the quality of motor equipment. It is an important technical field in the production of automotive filters. Leak detection equipment can accurately identify defective products and prevent bad products from entering the market. Dual-station leak detection equipment provides strong support for filter production by improving detection efficiency.

[0003] For example, the Chinese utility model patent document with publication number "CN220120315U" discloses a product clamping fixture for filter leak detection equipment. The fixture is primarily composed of a mounting frame, a fixed block, a locking rod, a mounting sleeve, a drive rod, a threaded joint, a buffer connection chamber, and a tensioning mechanism. The fixed block is mounted on the mounting frame, the locking rod is inserted into the fixed block, the mounting sleeve is externally mounted on the locking rod, and the drive rod is mounted within the mounting sleeve and connected to the locking rod. One end of the locking rod, after passing through the fixed block, is provided with a threaded joint for connecting to the filter, while the other end is provided with a buffer connection chamber. The drive rod is provided with a locking block at one end facing the locking rod, while the other end is connected to the tensioning mechanism. Furthermore, a buffering elastic member is provided within the buffer connection chamber to provide a buffering effect for the locking rod. During the filter leak detection process, the filter is first mounted on the threaded joint. The tensioning mechanism then drives the drive rod and locking rod to move, causing the threaded joint to tightly contact the sealing ring on the fixed block, creating a sealed environment. Next, an external air source supplies air to the screw-type air channel within the locking rod. The air enters the filter through the air intake channel for a leak test. If the filter is leaking, bubbles will appear in the water. Furthermore, the clamping fixture features a rotary drive motor and rotary drive assembly that rotate the locking rod and filter, enabling a more comprehensive test of the filter's air tightness.

[0004] The clamping fixture of this product has the following technical defects:

[0005] Each drive rod is equipped with a set of tensioning cylinders, but in filter side leakage equipment, the number of filters tested is not limited to one group, and can even be as high as more than a dozen groups. Due to differences in factors such as the cylinder's response speed, air path resistance, and air supply stability, it is difficult to ensure that all cylinders can operate completely synchronously. Due to the asynchronous operation of multiple groups of cylinders, the filter will have inaccurate test results due to uneven force during air tightness testing. If the cylinder on one side operates before the other side, this will cause the filter group to be clamped too early or too tightly, while the filter on the other side will lag behind or be clamped insufficiently. The resulting uneven sealing environment will cause air leakage or uneven test pressure distribution, which will directly affect the results of the air tightness test.

[0006] In conjunction with the attached document Figure 4 It can be clearly seen that the gas passes through the air inlet nozzle, drive rod, mounting sleeve, buffer connection cavity, locking rod, threaded connector in sequence before entering the filter. There are multiple connections in this gas flow route, which is prone to gas leakage, affecting the gas pressure and flow, and thus directly affecting the accuracy and efficiency of the filter air tightness detection. Utility Model Content

[0007] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned existing technologies and provide a filter auxiliary detection device, which drives the lifting plate to move through the lifting drive mechanism, drives all the main shafts to move downward synchronously, realizes the sealing of the lower end face of the filter, ensures that all filters are evenly stressed during testing, and improves the accuracy and efficiency of the test.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] The filter auxiliary detection device includes a frame, the upper end surface of the frame is provided with several groups of product detection positioning holes distributed at intervals, and a group of sealing disc assemblies are fixed at each group of product detection positioning holes, the sealing disc assembly is linked to a main shaft, the upper end of the main shaft is sealed and connected with a threaded connection, and the main shaft is linked with a main shaft driving mechanism that can drive the main shaft to rotate, which is characterized in that: a lifting plate is provided in the frame, and the lifting plate is provided with a linkage hole corresponding to each group of main shafts, the lower part of the main shaft passes through the linkage hole, and a buffer spring is provided above the lifting plate and is sleeved on the outer periphery of the main shaft, the upper end of the buffer spring is in contact with a first limit block, the first limit block is sleeved on the outer periphery of the main shaft and fixedly connected to the main shaft, the lower end of the buffer spring is in contact with the lifting plate, and the main shaft is linked with a transmission member distributed below the lifting plate, and the lifting plate is linked to the lifting drive mechanism.

[0010] Use the filter clamping mechanism to place the filter above the threaded connector and slowly push the filter downward to engage the threaded connector. During this period, the spindle, driven by the spindle drive mechanism, continues to rotate forward or reverse. Because the spiral entrance position of the threaded holes at the end of each filter group cannot remain consistent (caused by factors such as processing errors), the spindle will be pressed downward during the process of moving the filter down and installing the threaded connector, thereby compressing the buffer spring until the spindle rotates to the point where the threaded connector and the threaded hole at the end of the filter begin to engage. During this period, the buffer spring will drive the spindle upward to reset, so a buffer spring must be installed here. Otherwise, the spindle that is engaged in the threaded connection later will interfere with the filter, causing damage to the filter. After the filter is installed on the threaded connector, the filter clamping mechanism can be withdrawn. Then, the lifting drive mechanism drives the lifting plate downward, and the lifting plate pushes the transmission member, which in turn drives the main shaft downward. During this period, the sealing disc assembly does not move back and forth, but only maintains a sealed connection and relative rotation with the main shaft. Therefore, the filter follows the main shaft downward until the end face of the filter contacts the upper end face of the sealing disc assembly, sealing the end face of the filter and assisting in subsequent air tightness testing. In summary, it can be seen that the lifting drive mechanism drives the lifting plate to move, and the lifting plate then drives all the main shafts to move downward synchronously through all the transmission members to achieve the sealing of the lower end face of the filter, ensuring that all filters are evenly stressed during testing, thereby improving the accuracy and efficiency of the test. By uniformly controlling the lifting plate, the problem of asynchronous operation of multiple groups of cylinders is avoided. Furthermore, a buffer spring is provided. When the threaded connector is not installed with the filter, the main shaft can be squeezed and moved downward a small distance. When the threaded connector begins to be spirally connected to the threaded hole at the end of the filter, the buffer spring can help the main shaft slowly reset, avoiding interference between the threaded connector and the filter.

[0011] The above-mentioned filter auxiliary detection device can be further configured as follows: the lifting drive mechanism includes several groups of rolling members, the lifting plate is provided with several groups of mounting grooves, each group of rolling members is hinged in one group of mounting grooves, a pushing member is provided on one side of the rolling member, the pushing member is linked to a cylinder, the pushing member is provided with a pushing inclined surface at the end facing the rolling member, and a return spring is linked to the bottom of the lifting plate, the upper end of the return spring is in contact with the lifting plate, and the lower end is in contact with the frame; a slider is fixed above the pushing member, the slider is slidably matched with a slide rail, and the slide rail is fixed to the frame.

[0012] When the filter is installed on the threaded connector and the connection is completed, the cylinder starts working, pushing the pusher to slide along the slide rail. The pusher's push slope contacts the rolling element and generates thrust, causing the rolling element to rotate in the installation groove and push the lifting plate down. During the descent of the lifting plate, the return spring is compressed, providing an upward elastic force for the lifting plate. When the cylinder stops working, the elastic force of the return spring will push the lifting plate up and return to its initial position. At the same time, the sliding of the slider on the slide rail ensures the stable movement of the pusher and the rolling element, avoiding shaking and deviation. Among them, the rolling push form of the rolling element and the push slope can generate a large thrust and respond quickly, thereby ensuring that the lifting plate can descend smoothly and quickly.

[0013] The above-mentioned filter auxiliary detection device can be further configured as follows: a guide block is also provided at the mounting groove, a rolling clearance hole is provided in the middle of the guide block and is sleeved on the outer periphery of the rolling element, the rolling element is hinged in the rolling clearance hole and the end of the rolling element is higher than the end face of the guide block, and the guide block is provided with a sliding inclined surface on the side facing the pushing element.

[0014] When the pusher, propelled by the cylinder, slides along the guide rail and generates thrust through the pusher's inclined surface, contacting the rolling element, the rolling element rolls within the guide block's rolling clearance hole. Because the end of the rolling element is higher than the end surface of the guide block, the pusher can smoothly drive the rolling element to roll without being obstructed by the guide block. Furthermore, the guide block has a sliding inclined surface on the side facing the pusher. When the pusher contacts the guide block, the sliding inclined surface guides the pusher's smooth movement, preventing impact and shaking.

[0015] The above-mentioned filter auxiliary detection device can be further configured as follows: a plane bearing is provided between the buffer spring and the lifting plate, the plane bearing is sleeved on the outer periphery of the main shaft, the lower end face of the plane bearing is fixed on the lifting plate, and the upper end face of the plane bearing is in contact with the lower end of the buffer spring.

[0016] Since the upper end of the buffer spring maintains an abutting connection with the first limit block, the buffer spring will be driven to rotate when the main shaft rotates. Due to its structural characteristics, the upper end face of the plane bearing can maintain rotation with the buffer spring, and its lower end face is fixed on the lifting plate. This can avoid the end of the buffer spring from scratching between the lifting plate and protect the lifting plate and the spring.

[0017] The above-mentioned filter auxiliary detection device can be further configured as follows: the lifting plate is provided with a countersunk hole below the linkage hole, the transmission part includes a bearing group sleeved on the outer periphery of the main shaft, and a second limit block fixed on the main shaft is provided below the bearing group, and the outer diameter of the bearing group is larger than the inner diameter of the linkage hole and smaller than the inner diameter of the countersunk hole.

[0018] If the threaded connector and filter are installed smoothly, the bearing assembly will be located in the countersunk hole. When the spindle rotates, the bearing assembly can prevent scratching between the spindle and the lifting plate. When the spindle slowly moves down, the bearing assembly will follow it. If the threaded connector and filter are installed smoothly, the spindle will slowly rise under the action of the buffer spring until the bearing assembly also rises to the countersunk hole.

[0019] The above-mentioned filter auxiliary detection device can be further configured as follows: the sealing disc assembly includes a mounting seat fixed at the product detection positioning hole, an upper sealing seat is linked to the mounting seat through several groups of bearings, the upper sealing seat is sleeved on the outer periphery of the main shaft through several groups of bearings, and several groups of Y-shaped sealing rings are also provided between the upper sealing seat and the main shaft. A sealing disc capable of sealing the lower end face of the filter is fixed to the upper end of the upper sealing seat, and a through hole is provided in the middle of the sealing disc to match the clearance of the main shaft.

[0020] The mounting base is fixed to the product inspection positioning hole and serves as support for the entire sealing disc assembly. The upper sealing seat is mounted on the outer circumference of the main shaft via several sets of bearings, allowing the upper sealing seat to rotate around the main shaft and perform slight axial movement. The Y-shaped sealing ring has excellent elasticity and sealing performance, adapting to slight variations in the gap between the main shaft and the upper sealing seat. The sealing disc is designed to fit tightly against the lower end face of the filter, forming an effective seal.

[0021] The above-mentioned filter auxiliary detection device can be further configured as follows: an air inlet duct running through the main shaft along the axial direction is provided in the main shaft, an air outlet duct running through the main shaft along the axial direction and connected to the air inlet duct is provided in the threaded connection part, a group of axial positioning holes are provided on the lower end face of the frame corresponding to each group of main shafts, a lower sealing seat is installed at the axial positioning holes, the lower sealing seat is linked to the main shaft through a bearing, a Y-shaped sealing ring is also provided between the main shaft and the lower sealing seat, an air inlet chamber is provided in the sealing seat, the air inlet chamber is connected to the air inlet duct, and an air inlet nozzle for inflating the air inlet chamber is provided on the side wall of the lower sealing seat.

[0022] During testing, an external air source inflates the air intake chamber through the air inlet nozzle. The air then flows through the air intake and air outlet ducts into the filter for air tightness testing. By placing the air intake duct directly within the spindle and the air outlet duct within the threaded connector, the air flow path is greatly simplified, the number of joints is reduced, and the risk of gas leakage is reduced, improving the accuracy and efficiency of filter air tightness testing. The lower seal seat is linked to the spindle via a bearing and features a Y-shaped sealing ring to ensure the airtightness of the air intake chamber.

[0023] The above-mentioned filter auxiliary detection device can be further configured as follows: the main shaft drive mechanism includes a servo motor installed on one side of the frame, the output end of the servo motor is linked to a driving gear, the outer periphery of the main shaft is relatively fixedly connected to a driven gear, a group of transmission gears is provided between each two adjacent groups of main shafts, each group of transmission gears is respectively engaged with the two adjacent groups of driven gears, the transmission gears are rotatably installed on the frame, and the driven gears on a group of main shafts close to the servo motor are engaged with the driving gear.

[0024] The servo motor drives the driving gear to rotate, and the driving gear drives the driven gear to rotate, and the transmission gear is used to realize the synchronous rotation of all main shafts.

[0025] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0027] Figure 2 This is a schematic cross-sectional view of an embodiment of the present invention;

[0028] Figure 3 This is a partial structural exploded diagram of an embodiment of the present utility model;

[0029] Figure 4 This is a schematic cross-sectional view of a single set of main shafts according to an embodiment of the present invention.

[0030] Label annotation: frame 1, sealing disc assembly 2, threaded connector 3, main shaft 4, lifting plate 5, linkage hole 6, buffer spring 7, first limit block 8, rolling member 9, pusher 10, push inclined surface 11, cylinder 12, return spring 13, slider 14, slide rail 15, guide block 16, sliding inclined surface 17, plane bearing 18, countersunk hole 19, bearing group 20, second limit block 21, mounting seat 22, upper sealing seat 23, Y-type sealing ring 24, sealing disc 25, air inlet duct 26, air outlet duct 27, lower sealing seat 28, air inlet chamber 29, air inlet nozzle 30, servo motor 31, driving gear 32, driven gear 33, transmission gear 34. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figures 1 to 4The filter auxiliary detection device shown includes a frame 1. The upper end surface of the frame 1 is provided with several groups of product detection positioning holes distributed at intervals. A group of sealing disc assemblies 2 are fixed at each group of product detection positioning holes. The sealing disc assembly 2 is linked to the main shaft 4. The upper end of the main shaft 4 is sealed and connected with a threaded connector 3. The main shaft 4 is linked to a main shaft 4 driving mechanism that can drive the main shaft 4 to rotate. A lifting plate 5 is provided in the frame 1. The lifting plate 5 is provided with a linkage hole 6 corresponding to each group of main shafts 4. The lower part of the main shaft 4 passes through the linkage hole 6. A buffer spring 7 is provided above the lifting plate 5 and is sleeved on the outer periphery of the main shaft 4. The upper end of the buffer spring 7 is in contact with a first limit block 8. The first limit block 8 is sleeved on the outer periphery of the main shaft 4 and fixedly connected to the main shaft 4. The lower end of the buffer spring 7 is in contact with the lifting plate 5. The main shaft 4 is linked with a transmission member distributed below the lifting plate 5, and the lifting plate 5 is linked to the lifting drive mechanism. The lifting plate 5 is driven to move by the lifting drive mechanism, and the lifting plate 5 then drives all the main shafts 4 to move downward synchronously through all the transmission parts to achieve the sealing of the lower end face of the filter, ensuring that all filters are evenly stressed during testing, thereby improving the accuracy and efficiency of the test. By uniformly controlling the lifting plate 5, the problem of asynchronous operation of multiple groups of cylinders 12 is avoided. Furthermore, a buffer spring 7 is provided. When the threaded connector 3 is not installed with the filter, the main shaft 4 can be squeezed and moved downward a small distance. When the threaded connector 3 begins to be spirally connected to the threaded hole at the end of the filter, the buffer spring 7 can help the main shaft 4 to slowly reset, avoiding interference between the threaded connector 3 and the filter.

[0033] The lifting drive mechanism includes several groups of rolling elements 9. The lifting plate 5 is provided with several groups of mounting slots, each group of rolling elements 9 being hinged within one of the mounting slots. A pusher 10 is attached to one side of the rolling element 9, linked to a cylinder 12. The pusher 10 has a ramp 11 on the end facing the rolling element 9. A return spring 13 is attached to the bottom of the lifting plate 5, with its upper end contacting the lifting plate 5 and its lower end contacting the frame 1. A slider 14 is fixed above the pusher 10, which slides with a rail 15 fixed to the frame 1. Once the filter is installed in the threaded connector 3, the cylinder 12 activates, pushing the pusher 10 along the rail 15. The ramp 11 of the pusher 10 contacts the rolling element 9, generating a thrust that rotates the rolling element 9 within the mounting slot and pushes the lifting plate 5 downward. As the lifting plate 5 descends, the return spring 13 is compressed, providing an upward spring force for the lifting plate 5. When cylinder 12 stops operating, the elastic force of return spring 13 pushes lift plate 5 upward, returning it to its initial position. Simultaneously, the sliding motion of slider 14 on rail 15 ensures stable movement of pusher 10 and roller 9, preventing wobbling and deflection. The rolling motion of roller 9 and inclined driving surface 11 generates a strong and rapid thrust, ensuring smooth and rapid descent of lift plate 5.

[0034] The mounting groove is also equipped with a guide block 16. A central portion of the guide block 16 is provided with a rolling clearance hole that fits around the outer periphery of the rolling element 9. The rolling element 9 is hingedly connected to the rolling clearance hole, with the end of the rolling element 9 protruding above the end surface of the guide block 16. The guide block 16 also features a sloped sliding surface 17 on the side facing the pusher 10. When the pusher 10, driven by the cylinder 12, slides along the guide rail 15 and, through the sloped pushing surface 11, contacts the rolling element 9, generating thrust, the rolling element 9 rolls within the rolling clearance hole of the guide block 16. Because the end of the rolling element 9 is elevated above the end surface of the guide block 16, the pusher 10 can smoothly drive the rolling element 9 to roll without being obstructed by the guide block 16. Furthermore, the guide block 16 features a sloped sliding surface 17 on the side facing the pusher 10. When the pusher 10 contacts the guide block 16, the sloped sliding surface 17 guides the pusher 10 smoothly, preventing impact and shaking.

[0035] A plane bearing 18 is provided between the buffer spring 7 and the lifting plate 5. The plane bearing 18 is sleeved around the outer periphery of the main shaft 4. The lower end surface of the plane bearing 18 is fixed to the lifting plate 5, and the upper end surface of the plane bearing 18 contacts the lower end of the buffer spring 7. Since the upper end of the buffer spring 7 maintains a contact connection with the first limit block 8, when the main shaft 4 rotates, the buffer spring 7 is also driven to rotate. Due to its structural characteristics, the upper end surface of the plane bearing 18 can maintain rotation with the buffer spring 7, while its lower end surface is fixed to the lifting plate 5. This prevents the end of the buffer spring 7 from scratching between the lifting plate 5, protecting the lifting plate 5 and the spring.

[0036] The lifting plate 5 is provided with a countersunk hole 19 below the linkage hole 6. The transmission member includes a bearing assembly 20 sleeved around the outer circumference of the main shaft 4. Below the bearing assembly 20 is a second stopper 21 fixed to the main shaft 4. The outer diameter of the bearing assembly 20 is larger than the inner diameter of the linkage hole 6 and smaller than the inner diameter of the countersunk hole 19. If the threaded connector 3 is successfully installed with the filter, the bearing assembly 20 is located at the countersunk hole 19. When the main shaft 4 rotates, the bearing assembly 20 prevents scratching between the main shaft 4 and the lifting plate 5. When the main shaft 4 slowly moves downward, the bearing assembly 20 will follow. If the threaded connector 3 is installed with the filter, the main shaft 4 will slowly rise under the action of the buffer spring 7 until the bearing assembly 20 also rises to the position of the countersunk hole 19.

[0037] The sealing disc assembly 2 includes a mounting seat 22 fixed to the product detection positioning hole. The mounting seat 22 is linked to an upper sealing seat 23 through several groups of bearings. The upper sealing seat 23 is sleeved on the outer periphery of the main shaft 4 through several groups of bearings. Several groups of Y-shaped sealing rings 24 are also provided between the upper sealing seat 23 and the main shaft 4. A sealing disc 25 capable of sealing the lower end face of the filter is fixed to the upper end of the upper sealing seat 23. The middle part of the sealing disc 25 is provided with a through hole that is clearance-matched with the main shaft 4. The mounting seat 22 is fixed to the product detection positioning hole and serves as a support for the entire sealing disc assembly 2. The upper sealing seat 23 is sleeved on the outer periphery of the main shaft 4 through several groups of bearings, allowing the upper sealing seat 23 to rotate around the main shaft 4 or perform slight axial movement. Among them, the Y-shaped sealing ring 24 has good elasticity and sealing performance and can adapt to slight changes in the gap between the main shaft 4 and the upper sealing seat 23. The sealing disc 25 is used to fit tightly on the lower end face of the filter to form an effective seal.

[0038] An air inlet duct 26 is provided within the spindle 4, extending along its axis. An air outlet duct 27 is provided within the threaded connector 3, extending along its axis and communicating with the air inlet duct 26. The lower end surface of the frame 1 is provided with a set of axial positioning holes corresponding to each set of spindles 4. A lower sealing seat 28 is mounted in each of the axial positioning holes. The lower sealing seat 28 is linked to the spindle 4 via a bearing. A Y-shaped sealing ring 24 is also provided between the spindle 4 and the lower sealing seat 28. An air inlet chamber 29 is provided within the lower sealing seat 28, communicating with the air inlet duct 26. An air inlet nozzle 30 is provided on the sidewall of the lower sealing seat 28 for inflating the air inlet chamber 29. During the test, an external air source inflates the air inlet chamber 29 through the air inlet nozzle 30. The air then enters the filter through the air inlet duct 26 and the air outlet duct 27 for air tightness testing. By directly positioning the air inlet duct 26 within the main shaft 4 and the air outlet duct 27 within the threaded connector 3, the gas flow path is greatly simplified and the number of joints is reduced, thereby lowering the risk of gas leakage and improving the accuracy and efficiency of filter air tightness testing. The lower sealing seat 28 is linked to the main shaft 4 via a bearing and is equipped with a Y-shaped sealing ring 24 to ensure the sealing of the air inlet chamber 29.

[0039] The drive mechanism for the spindles 4 includes a servo motor 31 mounted on one side of the frame 1. A driving gear 32 is coupled to the output end of the servo motor 31. A driven gear 33 is fixedly connected to the outer periphery of the spindles 4. A set of transmission gears 34 is provided between each pair of adjacent sets of spindles 4. Each set of transmission gears 34 meshes with two adjacent sets of driven gears 33. The transmission gears 34 are rotatably mounted on the frame 1. The driven gears 33 on the set of spindles 4 closest to the servo motor 31 mesh with the driving gears 32. The servo motor 31 drives the driving gear 32 to rotate, which in turn drives the driven gears 33 to rotate. The transmission gears 34 enable synchronous rotation of all the spindles 4.

[0040] Specific working principle:

[0041] The filter is placed on the threaded connector 3 using the filter clamping mechanism, and is slowly pushed downward to be spirally connected to the threaded connector 3. During this period, the main shaft 4 continues to rotate forward under the drive of the main shaft 4 driving mechanism.

[0042] Some threaded connectors 3 are successfully installed with the filter, and this portion of the spindle 4 does not move downward. Other threaded connectors 3 engage the threaded holes at the filter ends later, primarily because the helical entry points of the threaded holes at each filter end do not align correctly with the helical entry points of the threaded connectors 3. Consequently, in this situation, the spindle 4 is pressed downward, compressing the buffer spring 7 until the spindle 4 rotates to the point where the threaded connector 3 begins to engage the threaded holes at the filter ends. During this period, the buffer spring 7 pulls the spindle 4 upward, returning it to its original position, until the filter is installed on the threaded connector 3.

[0043] After the filter is installed, the servo motor 31 stops working.

[0044] Next, as cylinder 12 pushes downward, it pushes pusher 10 along guide rail 15. The pusher's inclined surface 11 contacts rolling element 9, generating a thrust that rotates rolling element 9 within the mounting slot and pushes lift plate 5 downward. As lift plate 5 descends, return spring 13 is compressed, providing an upward spring force for lift plate 5. Lift plate 5 drives main shaft 4 downward by pushing bearing assembly 20. During this period, sealing disk assembly 2 does not reciprocate, so the filter follows main shaft 4 downward until its end surface contacts the upper end surface of sealing disk 25, sealing the filter end surface and assisting in subsequent airtightness testing.

[0045] When cylinder 12 is pulled back, the elastic force of return spring 13 can promote lifting plate 5 to rise, and returns to initial position. Then servo motor 31 reverses, and filter clamping mechanism slowly lifts filter.

Claims

1. A filter auxiliary inspection device comprising a frame, wherein the upper end surface of the frame is provided with a plurality of sets of spaced apart product inspection positioning holes, each set of product inspection positioning holes being fixed with a set of sealing disc assemblies, the sealing disc assemblies being linked to a main shaft, the upper end of the main shaft being sealed with a threaded connector, and the main shaft being linked to a main shaft drive mechanism capable of driving the main shaft to rotate, characterized in that: A lifting plate is provided in the frame, and a linkage hole is provided on the lifting plate corresponding to each group of main shafts. The lower part of the main shaft passes through the linkage hole. A buffer spring is provided above the lifting plate and is sleeved on the outer periphery of the main shaft. The upper end of the buffer spring is in contact with a first limit block, which is sleeved on the outer periphery of the main shaft and fixedly connected to the main shaft. The lower end of the buffer spring is in contact with the lifting plate, and the main shaft is linked with a transmission part distributed below the lifting plate. The lifting plate is linked to a lifting drive mechanism.

2. The filter auxiliary detection device according to claim 1, characterized in that: The lifting drive mechanism includes several groups of rolling members, several groups of mounting grooves are provided on the lifting plate, each group of rolling members is hinged in one group of mounting grooves, a pushing member is provided on one side of the rolling member, the pushing member is linked to a cylinder, the pushing member is provided with a pushing inclined surface at the end facing the rolling member, and a return spring is linked to the lower side of the lifting plate, the upper end of the return spring is in contact with the lifting plate, and the lower end is in contact with the frame; a slider is fixed above the pushing member, the slider is slidably matched with a slide rail, and the slide rail is fixed to the frame.

3. The filter auxiliary detection device according to claim 2, characterized in that: A guide block is also provided at the mounting groove, and a rolling clearance hole is provided in the middle of the guide block and is sleeved on the outer periphery of the rolling element. The rolling element is hinged in the rolling clearance hole and the end of the rolling element is higher than the end face of the guide block. The guide block is provided with a sliding inclined surface on the side facing the pushing element.

4. The filter auxiliary detection device according to claim 1, characterized in that: A plane bearing is provided between the buffer spring and the lifting plate. The plane bearing is sleeved on the outer periphery of the main shaft. The lower end surface of the plane bearing is fixed on the lifting plate. The upper end surface of the plane bearing contacts the lower end of the buffer spring.

5. The filter auxiliary detection device according to claim 4, characterized in that: The lifting plate is provided with a countersunk hole below the linkage hole, and the transmission part includes a bearing group sleeved on the outer periphery of the main shaft, and a second limit block fixed on the main shaft is provided below the bearing group. The outer diameter of the bearing group is larger than the inner diameter of the linkage hole and smaller than the inner diameter of the countersunk hole.

6. The filter auxiliary detection device according to claim 5, characterized in that: The sealing disc assembly includes a mounting seat fixed at the product detection positioning hole, an upper sealing seat is linked to the mounting seat through several groups of bearings, the upper sealing seat is sleeved on the outer periphery of the main shaft through several groups of bearings, and several groups of Y-shaped sealing rings are also provided between the upper sealing seat and the main shaft. A sealing disc capable of sealing the lower end surface of the filter is fixed to the upper end of the upper sealing seat, and a through hole is provided in the middle of the sealing disc to match the clearance of the main shaft.

7. The filter auxiliary detection device according to any one of claims 1 to 6, characterized in that: An air inlet passage running through the main shaft along the axial direction is provided in the main shaft, an air outlet passage running through the main shaft along the axial direction and connected to the air inlet passage is provided in the threaded connection part, a group of axial positioning holes are provided on the lower end surface of the frame corresponding to each group of main shafts, a lower sealing seat is installed at the axial positioning holes, the lower sealing seat is linked to the main shaft through a bearing, a Y-shaped sealing ring is also provided between the main shaft and the lower sealing seat, an air inlet chamber is provided in the sealing seat, the air inlet chamber is connected to the air inlet passage, and an air inlet nozzle for inflating the air inlet chamber is provided on the side wall of the lower sealing seat.

8. The filter auxiliary detection device according to any one of claims 1 to 6, characterized in that: The spindle drive mechanism includes a servo motor installed on one side of the frame, the output end of the servo motor is linked to a driving gear, the outer periphery of the spindle is relatively fixedly connected to a driven gear, a group of transmission gears are provided between each two adjacent groups of spindles, each group of transmission gears is respectively engaged with the two adjacent groups of driven gears, the transmission gears are rotatably mounted on the frame, and the driven gear on a group of spindles close to the servo motor is engaged with the driving gear.

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