Air tightness detection equipment for filter

Abstract

The utility model relates to air tightness detection equipment for a filter, which comprises a rack, an automatic sequencing and blanking device, an air tightness detection device and the like, and the automatic transfer of the filter is realized through an automatic discharging conveyer belt and a filter transfer device. The equipment has an automatic sorting function, and filters are sorted in two rows through the design of a left opening and closing plate, a right opening and closing plate, a material pushing block and a material containing groove. The air tightness detection device comprises a water tank, a detection clamping tool and a turnover mechanism, and stable clamping and detection of the filter are realized through a main shaft driving mechanism, a buffer spring and the like. And the transfer device adopts two-stage lifting and staggered clamping positions, so that the production efficiency is improved. In addition, the equipment is further provided with a material storage belt and a material guide guardrail, and the material storage belt and the material guide guardrail are used for buffering and orderly guiding the filters to enter the rotary disc for detection. The equipment reduces the cost, and improves the detection efficiency and accuracy.

Description

Technical Field

[0001] This utility model specifically relates to a filter airtightness testing device. Background Technology

[0002] As a crucial engine component, the performance of the filter not only determines the engine's reliability and lifespan but also significantly impacts its power, fuel economy, and emissions. Its structure includes the housing, cover, and paper core within the cavity, all requiring robust connections and tight sealing. Filter leak testing, aimed at assessing airtightness, directly relates to the quality of motor equipment and is a vital technical area in automotive filter production. Leak testing equipment can accurately identify defective products, preventing them from entering the market. Furthermore, dual-station leak testing equipment significantly improves testing efficiency, providing strong support for filter production.

[0003] For example, Chinese utility model patent document with publication number "CN220120315U" discloses a dual-station leak testing device for filters, mainly composed of a frame, an automatic sorting and feeding mechanism, a filter unloading mechanism, a leak testing station, a tilting mechanism, and a transfer mechanism. The automatic sorting and feeding mechanism and the filter unloading mechanism are respectively located at the front and rear ends of the frame for automatic loading and unloading of filters. The leak testing station is located on the frame and includes a leak testing water tank and a visual leak testing mechanism for airtightness testing of the filters. The tilting mechanism is located at the leak testing station and is used to move the filters into or out of the leak testing water tank. The transfer mechanism is responsible for sequentially transferring the filters between the automatic sorting and feeding mechanism, the tilting mechanism, and the filter unloading mechanism.

[0004] The dual-station side-leakage filter has the following technical defects:

[0005] Firstly, in conjunction with the appendix to the publicly available document... Figure 1 , 2 It is clear that the automatic sorting and feeding mechanism can only output a single row of filters and cannot automatically sort the filters from a single row into multiple rows. Therefore, to achieve the "dual-station" feature, two sets of the side leakage station, the flipping mechanism, and the transfer mechanism must be set up. This inevitably leads to higher manufacturing costs, larger size, larger footprint, and extremely cumbersome transportation and assembly of the equipment.

[0006] Secondly, its flipping mechanism includes several sets of filter clamping mechanisms, which consist of the following components: mounting bracket, fixing block, locking rod, mounting sleeve, drive rod, threaded joint, buffer connecting cavity, and tensioning mechanism. The filter is connected to the locking rod via the threaded joint, and the drive rod is connected to the locking rod and moves through the tensioning mechanism to achieve a seal. In the airtightness test, gas is introduced into the filter to detect leaks; if the filter leaks, bubbles will appear in the water. The filter clamping mechanism also includes a rotary drive motor and components that allow the filter to rotate. Each drive rod is equipped with a tensioning cylinder, and in filter side-leakage testing, multiple sets of filters need to be tested simultaneously. Due to differences in cylinder response speed, air path resistance, and air source stability, it is difficult to ensure that all cylinders operate synchronously, which leads to uneven force on the filter and affects the accuracy of the airtightness test. If one side's cylinders operate first, it may cause uneven sealing, resulting in air leakage or uneven test pressure distribution, thus affecting the test results. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a filter airtightness testing device in response to the shortcomings of the prior art. By using the automatic sorting function, the number of equipment requirements for dual-station leak testing stations, flipping mechanisms and filter transfer devices is reduced. Only the corresponding filter clamping station needs to be added, which reduces equipment cost and shrinks equipment size.

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

[0009] A filter airtightness testing device includes a frame, an automatic sorting and feeding device, and an airtightness testing device. An automatic discharge conveyor belt is provided between the automatic sorting and feeding device and the airtightness testing device. A filter transfer device is located above the automatic discharge conveyor belt. The airtightness testing device includes a water tank, at least two sets of testing clamping fixtures, and a flipping mechanism linked to the testing clamping fixtures. The automatic sorting and feeding device includes a conveyor belt and left and right opening / closing plates relatively distributed on both sides of the conveyor belt. Pulleys are linked to both ends of the conveyor belt, and the pulleys are linked to a second servo motor. The left and right opening / closing plates are linked to a mechanism that drives the left and right opening / closing plates. For the opening and closing drive mechanism that is close to or separates from each other, the following features are provided: the left opening and closing plate is provided with a number of sets of left push blocks spaced apart from each other on the side facing the right opening and closing plate; the right opening and closing plate is provided with a set of right receiving grooves corresponding to each set of left push blocks on the side facing the left opening and closing plate; a set of left receiving grooves is provided between each pair of adjacent sets of left push blocks; and a set of right push blocks is provided between each pair of adjacent sets of right receiving grooves. When the left and right opening and closing plates are close to each other, each set of corresponding left push blocks and right receiving grooves forms a first column of sorting grooves, and each set of right push blocks and left receiving grooves forms a second column of sorting grooves. The first column of sorting grooves and the second column of sorting grooves are staggered.

[0010] When the equipment starts, the filter is conveyed by the conveyor belt. When the filter reaches the designated position, the second servo motor drives the pulley to rotate, which in turn drives the conveyor belt to stop or slow down. At this time, the opening and closing drive mechanism drives the left and right opening and closing plates to move closer together, forming the first and second sorting slots. The left pusher pushes the filter into the first sorting slot, while the right pusher pushes the filter into the second sorting slot. The filter is stably clamped in the sorting slot, ready for the next transfer. Through the automatic sorting function, the number of dual-station leak testing stations, flipping mechanisms and filter transfer devices required by the equipment is reduced. Only the corresponding filter clamping station needs to be added, which reduces the equipment cost and minimizes the size of the equipment.

[0011] The aforementioned filter airtightness testing equipment can be further configured as follows: the opening and closing drive mechanism includes a mounting frame disposed below the conveyor belt, the mounting frame having several sets of lead screws hinged thereon, the upper part of the lead screw having a first section of thread and the lower part having a second section of thread, the first section of thread and the second section of thread being symmetrical to each other, the lead screw being linked to a left nut sleeve through the first section of thread, the lead screw being linked to a right nut sleeve through the second section of thread, the left nut sleeve being linked to a left slider, the right nut sleeve being linked to a right slider, the left slider being linked to a left opening and closing plate, the right slider being linked to a right opening and closing plate, a first slide rail being fixed on the mounting frame, the left slider and the right slider being slidably engaged with the first slide rail respectively; the end of the lead screw being linked to a driven pulley, the driven pulley being linked to a belt, the belt being linked to a driving pulley, and the driving pulley being linked to a first servo motor fixed on the mounting frame.

[0012] The first servo motor starts, driving the drive pulley to rotate. The drive pulley transmits power to the driven pulley via a belt. The driven pulley is linked to the end of the lead screw, thus driving the lead screw to rotate. The lead screw has a first and a second symmetrical thread section. As the lead screw rotates, the left nut sleeve moves upward on the first thread section, and the right nut sleeve moves downward on the second thread section (or in the opposite direction, depending on the direction of rotation of the lead screw). This allows the left and right nut sleeves to move synchronously but in opposite directions. The left nut sleeve is linked to the left slider, and the right nut sleeve is linked to the right slider. As the nut sleeves move, the left and right sliders slide on the first slide rails respectively, thereby causing the left and right opening plates to move closer or separate. When the left and right opening plates move closer, a first row of sorting grooves gradually forms between the left pusher block and the right receiving trough, and a second row of sorting grooves gradually forms between the right pusher block and the left receiving trough. The filters are accurately pushed into these sorting grooves, achieving automatic sorting and arrangement of the filters. The first slide rail and the slider serve two purposes: firstly, to transmit force, and secondly, to improve the movement stability of the left and right opening plates.

[0013] The aforementioned filter airtightness testing equipment can be further configured as follows: a turntable and a turntable drive mechanism for driving the turntable are provided at the feed end of the conveyor belt. Several sets of gripper mechanisms are arranged circumferentially on the turntable. A cam is hinged to the center of the turntable. A push block is provided between the gripper mechanism and the cam. The turntable drive mechanism can drive the turntable to rotate around the cam. A set of sliding grooves is provided on the turntable corresponding to each set of push blocks. A first slider adapted to the sliding groove is linked below the push block. One end of the push block remains in contact with the outer circumferential surface of the cam, and the other end extends to the center of the gripper mechanism. Pushing inclined surfaces are symmetrically arranged on both sides of the push block. The gripper mechanism includes two sets of symmetrically distributed grippers. One end of each set of grippers extends to the pushing inclined surface, and the middle is hinged to the turntable. Each set of grippers is linked to a set of elastic restoring... The positioning mechanism includes a spring seat fixed on a turntable. The spring seat has a first mounting hole on its side facing the gripper. A gripper return spring is installed in the first mounting hole. A push pin is linked to the end of the gripper return spring. A guide strip is provided between one end and the middle of the gripper. The push pin is kept in contact with the guide strip under the push of the gripper return spring. A first roller is hinged to one end of the push block. The first roller rolls in contact with the outer peripheral surface of the cam. The outer peripheral surface of the cam has at least one set of protrusions. The two ends of the protrusions are curved at the connection points with the cam. A first limiting block is fixed to the cam at the end of the protrusion. A second limiting block is linked above the push block. A second roller is hinged to one end of the gripper. The second roller rolls in contact with the push inclined surface.

[0014] When the turntable drive mechanism rotates the turntable, one end of the push block contacts the outer peripheral surface of the cam (this is mainly because the gripper return spring constantly pushes the gripper, causing the end of the gripper to always abut against the push inclined surface, applying a resisting force to the push block). As the shape of the cam changes, the push block is pushed and slides along the slide groove. When the push block slides along the slide groove, its push inclined surface pushes the gripper, causing the gripper to rotate around its center, realizing the opening and closing action. This reduces the number of drive sources; the entire turntable robot only needs one turntable drive mechanism to drive the movement of the entire turntable and all gripper mechanisms, greatly reducing structural complexity and manufacturing costs. Furthermore, since there are protrusions on the outer periphery of the cam, and a first limiting block is designed above a set of protrusions, and a second limiting block is designed above the push block, the purpose is to prevent the gripper from opening too early. It can only open when the gripper reaches the predetermined position, realizing rapid material feeding and clamping, and preventing the filter from falling or slipping out. In summary, all gripper mechanisms operate simultaneously during the turntable's rotation, eliminating the need to wait for one action to complete before proceeding to the next, thus significantly improving work efficiency. The inclusion of a sliding groove and a first slider ensures the push block slides smoothly radially along the turntable without deviation or jamming, guaranteeing the accuracy and stability of the opening and closing actions.

[0015] The aforementioned filter air tightness testing equipment can be further configured as follows: the turntable is provided with a material passage opening groove corresponding to each set of gripper mechanisms, a feeding plate is provided at each set of material passage opening grooves, a strip-shaped detection hole is passed through the feeding plate, a material inlet sensor is installed at the strip-shaped detection hole, the material inlet sensor is fixed on the bracket, a second slider is fixedly installed on the bracket, the second slider is slidably connected to a second slide rail, the second slide rail is fixed below the feeding plate, and a number of sets of fastening holes are provided on the second slide rail.

[0016] A feed opening slot is provided to facilitate the entry of the filter into the turntable. A feed plate and a material sensor are added to detect the presence or position of the filter; once detected, the turntable begins operation. The material sensor is fixed to a bracket, which is slidably connected to a second slide rail via a second slider. The second slide rail is fixed below the feed plate and has several sets of locking holes for adjusting the position of the material sensor.

[0017] The aforementioned filter airtightness testing device can be further configured as follows: a second mounting hole is provided through the center of the turntable, a bearing is provided in the second mounting hole, the bearing is linked to a mounting shaft, a tapered connecting column is provided at the upper end of the mounting shaft, a connecting hole is provided in the middle of the cam and at the upper end of the tapered connecting column, a first strip-shaped pin groove is provided on the outer periphery of the tapered connecting column, a tapered insertion hole adapted to the tapered connecting column is provided below the cam, a second strip-shaped pin groove is provided on the side wall of the tapered insertion hole corresponding to the first strip-shaped pin groove, and the second strip-shaped pin groove is provided through the cam.

[0018] A bearing is installed in the second mounting hole to achieve "rotation of the turntable around the cam while the cam remains stationary." The mounting shaft is used to mount the cam. A tapered connecting post and a tapered connecting hole are added to accommodate different cam specifications. A pin is inserted between the first and second strip-shaped pin slots to achieve a fixed connection between the cam and the mounting shaft.

[0019] The aforementioned filter airtightness testing device can be further configured as follows: the flipping mechanism includes a base, and the base is rotatably connected to an A-active flipping shaft and a B-active flipping shaft via bearings. The A-active flipping shaft and the B-active flipping shaft are parallel to each other and spaced apart. An A-driven flipping shaft is provided on the side of the A-active flipping shaft away from the B-active flipping shaft, and a B-driven flipping shaft is provided on the side of the B-driven flipping shaft away from the A-active flipping shaft. A first transmission gear set is provided between the A-active flipping shaft and the A-driven flipping shaft, and a left servo motor is linked to the end of the B-active flipping shaft, and a right servo motor is linked to the end of the B-active flipping shaft; the base... A rotating shaft is linked to the lower center of the base. The axis of the rotating shaft is perpendicular to the axis of the active flipping shaft A. A divider is linked to the lower end of the rotating shaft. The divider drives the base to rotate around the central axis of the rotating shaft. Position sensors are fixed on both sides of the base. One set of position sensors is distributed between the active flipping shaft A and the driven flipping shaft A, and another set of position sensors is distributed between the active flipping shaft B and the driven flipping shaft B. A left connecting block is fixed on the driven flipping shaft A, and a right connecting block is fixed on the driven flipping shaft B. The left and right connecting blocks are respectively connected to filter linkage plates by screws. Each set of detection clamping fixtures is installed on each set of filter linkage plates.

[0020] The divider is controlled by a geared motor, which in turn drives the base to rotate horizontally (e.g., 180 degrees or the required angle, depending on the actual situation) via a rotating shaft. Then, the A-active tilting shaft drives the A-driven tilting shaft downwards via the first transmission gear set, allowing the filter to enter the water for testing. During this process, the B-active and B-driven tilting shafts have rotated with the base to the receiving position, preparing for filter loading. Therefore, testing and loading are performed simultaneously, improving testing efficiency and ensuring that the receiving and testing positions remain constant, simplifying the movement path of the transfer mechanism. A position sensor is used to detect the position information of the filter linkage plate, i.e., to detect the position of the filter. When the tilting shaft rotates, the connecting block moves accordingly, thereby causing the filter on the filter linkage plate to tilt and be tested.

[0021] The aforementioned filter airtightness testing equipment can be further configured as follows: the testing clamping fixture includes a frame, the upper end face of which is fixed with several sets of spaced sealing disc assemblies, the sealing disc assemblies are linked to a main shaft, the upper end of the main shaft is sealed with a threaded connector, and the main shaft is linked to a main shaft drive mechanism capable of rotating the main shaft; a first lifting plate is provided inside the frame, the first lifting plate has a linkage hole corresponding to each set of main shafts, the lower part of the main shaft passes through the linkage hole, a buffer spring is provided above the first lifting plate and sleeved on the outer periphery of the main shaft, the upper end of the buffer spring abuts against a third limiting block, the third limiting block is sleeved on the outer periphery of the main shaft and fixedly connected to the main shaft, a plane bearing is provided between the buffer spring and the first lifting plate, the plane bearing is sleeved on the outer periphery of the main shaft, and the lower end face of the plane bearing is fixed to the first lifting plate. The upper end face of the planar bearing abuts against the lower end of the buffer spring; the main shaft is linked to a transmission component distributed below the first lifting plate, the first lifting plate is provided with a countersunk hole below the linkage hole, the transmission component includes a bearing assembly sleeved on the outer circumference of the main shaft, a fourth limiting block fixed on the main shaft is provided below the bearing assembly, the outer diameter of the bearing assembly is larger than the inner diameter of the linkage hole and smaller than the inner diameter of the countersunk hole, the first lifting plate is linked to a lifting drive mechanism, the lifting drive mechanism includes several sets of rollers, the first lifting plate is provided with several sets of mounting slots, each set of rollers is hinged in a set of mounting slots, a pusher is provided on one side of the roller, the pusher is linked to a cylinder, the pusher is provided with a pushing inclined surface at the end facing the roller, a return spring is linked below the first lifting plate, the upper end of the return spring abuts against the first lifting plate and the lower end abuts against the frame.

[0022] The filter is placed above the threaded connector using a filter transfer device, and then slowly pushed downwards to connect with the threaded connector. During this process, the spindle continues to rotate forward under the drive of the spindle drive mechanism. Because the helical inlet positions of the threaded holes at the ends of each filter set cannot be kept consistent (due to machining errors and other factors), during the downward movement of the filter and installation with the threaded connector, the spindle may be pressed down, causing it to move downwards and compress the buffer spring. This continues until the spindle rotates to the point where the threaded connector and the threaded hole at the end of the filter begin to connect helically. During this period, the buffer spring will drive the spindle upwards to reset. Therefore, a buffer spring must be installed here; otherwise, the spindle that connects later will interfere with the filter, damaging it. Simultaneously, the upper end face of the plane bearing can rotate with the buffer spring, while its lower end face is fixed to the first lifting plate. This prevents the end of the buffer spring from scraping against the first lifting plate, protecting both the first lifting plate and the buffer spring. After the filter is installed on the threaded connector, the filter transfer device can be retracted. At this point, the bearing assembly is in the countersunk hole position, preventing scraping between the main shaft and the first lifting plate during spindle rotation. Next, the cylinder starts working, the pusher slides, and the pusher's inclined surface contacts the roller, generating thrust. This causes the roller to rotate within the mounting slot and push the first lifting plate downwards. During the descent of the first lifting plate, the return spring is compressed, providing an upward elastic force to the first lifting plate. When the cylinder stops working, the return spring's elastic force pushes the first lifting plate upwards, returning it to its initial position. The roller and pusher's inclined surface utilize a rolling push mechanism, generating a large and rapid thrust, thus ensuring the first lifting plate descends smoothly and quickly.

[0023] The aforementioned filter air tightness testing equipment can be further configured as follows: the main shaft is provided with an air inlet channel that runs through the axial direction, the threaded connector is provided with an air outlet channel that runs through the axial direction and communicates with the air inlet channel, the lower end face of the frame is provided with a set of axial positioning holes corresponding to each set of main shafts, a lower sealing seat is installed at the axial positioning hole, 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 communicates with the air inlet channel, and an air inlet nozzle for inflating the air inlet chamber is provided on the side wall of the lower sealing seat.

[0024] During testing, an external air source fills the intake chamber through the air inlet. The gas then enters the filter through the intake and exhaust channels for airtightness testing. By directly incorporating the intake channel inside the main shaft and the exhaust channel within the threaded connector, the gas flow path is significantly simplified, reducing the number of connections and thus lowering the risk of gas leakage. This improves the accuracy and efficiency of filter airtightness testing. The lower sealing seat is linked to the main shaft via a bearing and features a Y-type sealing ring to ensure the airtightness of the intake chamber.

[0025] The aforementioned filter airtightness testing equipment can be further configured as follows: the filter transfer device includes a transfer guide rail mounted above the frame, a transfer frame that reciprocates along the transfer guide rail, and an openable transfer clamping mechanism. A longitudinal drive assembly is provided between the transfer frame and the transfer clamping mechanism to drive the transfer clamping mechanism to rise and fall vertically. The longitudinal drive assembly includes lifting cylinders mounted on both sides of the transfer frame, a second lifting plate linked to the output end of the lifting cylinders, longitudinal synchronous pulleys mounted on the second lifting plate, and a longitudinal synchronous belt sleeved between the longitudinal synchronous pulleys. A connecting block is provided on the longitudinal synchronous belt, and the connecting block is linked to a third lifting plate. A third slider is mounted on the third lifting plate, and the third slider is slidably connected to a fixed... The second lifting plate is mounted on a third slide rail, and the second lifting plate is equipped with a fourth slider. The fourth slider is slidably connected to a fourth slide rail fixed on the transfer frame. The transfer clamping mechanism includes a main clamp, a secondary clamp, and a clamping drive assembly for controlling the opening and closing of the main clamp and the secondary clamp. The main clamp and the secondary clamp are each provided with a number of corresponding first V-shaped clamping slots. The corresponding first V-shaped clamping slots between the main clamp and the secondary clamp form quadrilateral clamping positions for clamping the filter. Each pair of adjacent quadrilateral clamping positions is staggered. The clamping drive assembly includes open clamping cylinders disposed on both sides of the main clamp and the secondary clamp. The output ends of the open clamping cylinders are respectively connected to the main clamp and the secondary clamp, and drive the main clamp and the secondary clamp to move in opposite directions.

[0026] The lifting cylinder controls the second lifting plate, which acts as a transfer frame for lifting. The longitudinal synchronous belt also controls the lifting of the second lifting plate relative to the first lifting plate, thus achieving two-stage lifting and a longer lifting range. Meanwhile, the staggered distribution of adjacent sets of quadrilateral clamping positions aims to clamp two rows of filters, improving production efficiency, simplifying the equipment structure, and reducing costs.

[0027] The aforementioned filter air tightness testing equipment can be further configured as follows: the frame is also provided with a storage belt distributed on one side of the turntable, the two ends of the storage belt are linked to sprockets, the sprockets are linked to a third servo motor, a guide rail is provided above the storage belt, the two ends of the guide rail are inclined toward one side of the storage belt, and the middle part of the guide rail is close to the other side of the storage belt.

[0028] The storage belt has multiple sets of filters, and the guide rails guide the filters to the turntable in an orderly manner.

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the material storage strip according to an embodiment of the present utility model;

[0032] Figure 3 This is a schematic diagram of an automatic material discharge conveyor belt according to an embodiment of the present utility model;

[0033] Figure 4 This is a schematic diagram of the rotary manipulator module structure according to an embodiment of the present invention. Figure 1 ;

[0034] Figure 5 This is a schematic diagram of the rotary manipulator module structure according to an embodiment of the present invention. Figure 2 ;

[0035] Figure 6 This is a top view schematic diagram of the rotary manipulator module according to an embodiment of the present utility model;

[0036] Figure 7 This is an exploded view of a portion of the turntable structure in an embodiment of this utility model;

[0037] Figure 8 This is a schematic diagram of the cam structure according to an embodiment of the present invention. Figure 1 ;

[0038] Figure 9 This is a schematic diagram of the cam structure according to an embodiment of the present invention. Figure 2 ;

[0039] Figure 10 This is a schematic diagram of the gripper mechanism according to an embodiment of the present utility model;

[0040] Figure 11 This is a schematic diagram of the pushing block according to an embodiment of the present utility model;

[0041] Figure 12 This is a schematic diagram of the automatic sorting and splitting module according to an embodiment of the present utility model;

[0042] Figure 13 This is a three-dimensional structural diagram of the left opening and closing plate according to an embodiment of the present utility model;

[0043] Figure 14 for Figure 13 Enlarged view of a portion of point A in the middle;

[0044] Figure 15 This is a top view of the structure at the opening and closing plate in an embodiment of the present utility model;

[0045] Figure 16 This is a schematic diagram of an explosion at the conveyor belt in an embodiment of the present invention;

[0046] Figure 17 This is a schematic diagram of the filter transfer device according to an embodiment of the present invention;

[0047] Figure 18 This is a bottom view of the filter transfer device according to an embodiment of the present invention;

[0048] Figure 19 This is a schematic diagram of the linkage between the first lifting plate and the second lifting plate in an embodiment of this utility model;

[0049] Figure 20 This is a schematic diagram of the detection clamping fixture according to an embodiment of the present utility model;

[0050] Figure 21 This is a schematic cross-sectional view of the detection clamping tool according to an embodiment of the present utility model;

[0051] Figure 22 This is an explosion diagram of the pushing component in an embodiment of the present utility model;

[0052] Figure 23 This is a schematic cross-sectional view of a single spindle according to an embodiment of the present invention;

[0053] Figure 24 This is a schematic diagram of the flipping mechanism according to an embodiment of the present utility model;

[0054] Figure 25 This is a top view schematic diagram of the flipping mechanism according to an embodiment of the present utility model.

[0055] Figure 26 This is a schematic diagram of the flipping mechanism in an embodiment of the present utility model;

[0056] Label annotations: Rotary robot module a, Rotary a1, Cam a2, Push block a3, Slide a4, First slider a5, Pushing inclined surface a6, Gripper a7, Spring seat a8, Gripper return spring a9, Push pin a10, Guide bar a11, First roller a12, Protrusion a13, First limit block a14, Second limit block a15, Second roller a16, Bearing a17, Mounting shaft a18, Tapered connecting column a19, Connecting hole a20, First strip-shaped pin groove a21, Tapered insertion hole a22, Second strip-shaped pin groove a23, Rotating sleeve a24, Clearance through hole a25, Reducer a26, Material passage opening groove a27, Feeding Plate a28, strip detection hole a29, material inlet sensor a30, bracket a31, second slider a32, second slide rail a33; automatic sorting and arranging module b, conveyor belt b1, left opening plate b2, right opening plate b3, left pusher block b4, right receiving trough b5, left receiving trough b6, right pusher block b7, V-shaped guide groove b8, V-shaped positioning edge b9, feeding guide edge b10, mounting bracket b11, first thread section b12, second thread section b13, left nut sleeve b14, right nut sleeve b15, left slider b16, right slider b17, first slide rail b18, driven pulley b19, driving pulley b20, upper rod body b21, lower rod Body b22, connecting ring b23, opening groove b24, pulley b25, second servo motor b26, support frame b27, magnetic component b28; storage belt c, guide rail c1; filter transfer device d, transfer guide rail d1, transfer frame d2, lifting cylinder d3, second lifting plate d4, longitudinal synchronous belt d5, connecting block d6, third lifting plate d7, main clamp d8, auxiliary clamp d9, quadrilateral clamping position d10, opening clamping cylinder d11; detection clamping fixture e, frame e1, sealing disc assembly e2, threaded connector e3, main shaft e4, first lifting plate e5, linkage hole e6, buffer spring e7, third limit block e8, roller e 9. Pushing component e10, Pushing inclined surface e11, Cylinder e12, Return spring e13, Fifth slider e14, Fifth slide rail e15, Guide block e16, Sliding inclined surface e17, Flat bearing e18, Countersunk hole e19, Bearing assembly e20, Fourth limit block e21, Mounting seat e22, Upper sealing seat e23, Y-type sealing ring e24, Sealing disc e25, Air inlet e26, Air outlet e27, Lower sealing seat e28, Air inlet chamber e29, Air inlet nozzle e30, Fifth servo motor e31, Drive gear e32, Driven gear e33, Transmission gear e34; Automatic discharge conveyor belt f, Discharge transition frame f1, Third roller f2;Tilting mechanism g, base g1, A active tilting shaft g2, B active tilting shaft g3, A driven tilting shaft g4, B driven tilting shaft g5, first driving gear g6, first driven gear g7, second driving gear g8, second driven gear g9, rotating shaft g10, divider g11, position sensor g12, left servo motor g13, right servo motor g14, right connecting block d6 g15, left connecting block d6 g16, filter linkage plate g17, shock absorber g18, support base g19, cable tray g20, cable outlet compartment g21; water tank h. Detailed Implementation

[0057] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0058] like Figure 1 The automatic leak tester for filters shown includes a frame, an automatic sorting and feeding device, and an airtightness testing device. An automatic discharge conveyor belt is provided between the automatic sorting and feeding device and the airtightness testing device. A filter transfer device is provided above the automatic discharge conveyor belt. The airtightness testing device includes a water tank h, at least two sets of testing clamping fixtures, and a flipping mechanism that is linked to the testing clamping fixtures.

[0059] The automatic sorting and unloading device includes a rotary robot module a, an automatic sorting and arranging module b, and a storage belt c.

[0060] like Figure 2 The storage belt c shown has sprockets at both ends, which are linked to a third servo motor. A guide rail c1 is located above the storage belt c, with both ends of the guide rail c1 inclined towards one side of the storage belt c, and the middle of the guide rail c1 close to the other side of the storage belt c. The storage belt c buffers multiple sets of filters, and the guide rail c1 guides the filters to the turntable in an orderly manner.

[0061] like Figures 4 to 11The rotary manipulator module a shown includes a rotary disk a1 and a rotary disk drive mechanism that drives the rotary disk a1 to rotate. Several sets of gripper mechanisms are arranged circumferentially on the rotary disk a1. An opening and closing drive mechanism mounted on the rotary disk a1 is arranged between the gripper mechanisms and a cam a2. The opening and closing drive mechanism can slide radially along the rotary disk a1. A cam a2 is hinged to the middle of the rotary disk a1. The rotary disk drive mechanism can rotate the rotary disk a1 around the cam a2. The opening and closing drive mechanism follows the rotation of the rotary disk a1 around the cam a2, and its end remains in contact with the outer peripheral surface of the cam a2, thereby controlling the opening and closing of the gripper mechanisms. When the rotary disk a1 rotates around the cam a2, the end of the opening and closing drive mechanism always remains in contact with the outer peripheral surface of the cam a2. Due to the shape design of the cam a2 (usually eccentric or irregular), as the rotary disk a1 rotates, the outer peripheral surface of the cam a2 will periodically change its contact position with the end of the opening and closing drive mechanism, thereby pushing or pulling the opening and closing drive mechanism to slide radially. This sliding motion is then converted into the opening and closing action of the gripper mechanism, realizing the gripping and releasing of the filter. Since the opening and closing drive mechanism is independent and can slide radially along the turntable a1, the opening and closing action of each gripper mechanism can be controlled independently. That is, at a specific workstation, only the gripper mechanism at that workstation can extend or retract, while the gripper mechanisms at other workstations remain stationary. This greatly improves the flexibility of the turntable a1-type robot, meeting the working conditions where only the gripper a7 at a specific workstation needs to extend. Furthermore, it reduces the number of drive sources, requiring only one turntable drive mechanism to drive the movement of the entire turntable a1 and all gripper mechanisms. Simultaneously, the simple mechanical structure of the cam a2 and the opening and closing drive mechanism also reduces manufacturing and maintenance costs. It should be noted that when the turntable a1 rotates, the cam a2 remains stationary.

[0062] The opening and closing drive mechanism includes a push block a3. A set of sliding grooves a4 are provided on the turntable a1 for each set of push blocks a3. A first slider a5 adapted to the sliding groove a4 is linked below the push block a3. One end of the push block a3 is kept in contact with the outer peripheral surface of the cam a2, and the other end extends to the middle of the gripper mechanism. Pushing inclined surfaces a6 are symmetrically arranged on both sides of the push block a3. The gripper mechanism includes two sets of symmetrically distributed grippers a7. One end of each set of grippers a7 extends to the pushing inclined surface a6, and the middle is hinged to the turntable a1. Each set of grippers a7 is linked to a set of elastic reset mechanism. The elastic reset mechanism pushes or pulls the gripper a7 to rotate around the middle of the gripper a7, so that one end of the gripper a7 keeps in contact with the pushing inclined surface a6.

[0063] When turntable a1 rotates, one end of push block a3 contacts the outer peripheral surface of cam a2 (this is mainly because the elastic reset mechanism constantly pushes or pulls gripper a7, causing the end of gripper a7 to always abut against the push inclined surface a6, applying a resisting force to push block a3). As the shape of cam a2 changes, push block a3 is pushed or pulled, sliding along slide groove a4. The other end of push block a3 extends to the middle of gripper mechanism, with push inclined surfaces a6 on both sides. When push block a3 slides along slide groove a4, its push inclined surface a6 pushes or pulls gripper a7, causing gripper a7 to rotate around its middle, realizing the opening and closing action. Through the cooperation of cam a2, opening and closing drive mechanism (push block a3 and its specific structure), and elastic reset mechanism, the opening and closing action of gripper mechanism is realized, reducing the number of drive sources. The entire turntable a1 manipulator only needs one turntable drive mechanism to drive the movement of the entire turntable a1 and all gripper mechanisms, greatly reducing structural complexity and manufacturing cost. Furthermore, due to the shape of cam a2, when turntable a1 rotates, push block a3 contacts cam a2 and slides at the convex or concave points of cam a2, thereby sequentially driving the opening and closing actions of each set of gripper mechanisms. All gripper mechanisms operate simultaneously during the rotation of turntable a1, without waiting for the previous action to complete before proceeding to the next, significantly improving work efficiency. Specifically, the sliding groove a4 and the first slider a5 ensure that push block a3 can slide smoothly radially along turntable a1 without deviation or jamming, thus guaranteeing the accuracy and stability of the opening and closing actions. The gripper mechanism is designed as a rotatable gripper a7, and the opening and closing of the two sets of grippers a7 are controlled by a pushing inclined plane a6 and an elastic reset mechanism. Compared to existing technologies, this eliminates the need for gripper cylinders, resulting in lower costs and faster speed.

[0064] The elastic reset mechanism includes a spring seat a8 fixed on the turntable a1. The spring seat a8 has a mounting hole on the side facing the gripper a7. A gripper reset spring a9 is provided in the mounting hole. A push pin a10 is linked to the end of the gripper reset spring a9. A guide bar a11 is provided between one end and the middle of the gripper a7. The push pin a10 is kept in contact with the guide bar a11 under the push of the gripper reset spring a9.

[0065] When turntable a1 rotates, if push block a3 passes the highest point of cam a2, push block a3 moves forward, pushing inclined plane a6 to squeeze gripper a7. Guide bar a11 on gripper a7 squeezes gripper return spring a9, generating preload. Once push block a3 returns to its original position, gripper return spring a9 pushes gripper a7 to its original position via push pin a10, thus achieving the opening and closing action.

[0066] One end of the push block a3 is hinged to a first roller a12, which rolls in contact with the outer peripheral surface of the cam a2. The outer peripheral surface of the cam a2 is provided with at least one set of protrusions a13. The two ends of the protrusions a13 are curved at the connection with the cam a2. The end of the protrusions a13 is fixed to the cam a2 with a first limiting block a14. A second limiting block a15 is linked above the push block a3. One end of the gripper a7 is hinged to a second roller a16, which rolls in contact with the push inclined surface a6.

[0067] The rolling contact between the first roller a12 and the second roller a16 reduces friction and wear, improving the flexibility and accuracy of the movement of the push block a3 and the gripper a7. The protrusion a13, which is the high point of the cam a2, changes the position of the push block a3. A first limiting block a14 is designed above a set of protrusions a13, and a second limiting block a15 is designed above the push block a3. This is to prevent the gripper a7 from opening prematurely; it should only open after reaching the predetermined position, enabling rapid material discharge and preventing the filter from falling or slipping out.

[0068] A mounting hole runs through the center of the turntable a1, and a bearing a17 is installed inside the mounting hole. The bearing a17 is linked to a mounting shaft a18. A tapered connecting post a19 is provided at the upper end of the mounting shaft a18. A connecting hole a20 is provided in the middle of the cam a2 and at the upper end of the tapered connecting post a19. A first strip-shaped pin groove a21 is provided on the outer periphery of the tapered connecting post a19. A tapered insertion hole a22 that matches the tapered connecting post a19 is provided below the cam a2. A second strip-shaped pin groove a23 is provided on the side wall of the tapered insertion hole a22 corresponding to the first strip-shaped pin groove a21. The second strip-shaped pin groove a23 runs through the cam a2.

[0069] A bearing a17 is installed in the mounting hole to allow the turntable a1 to rotate around the cam a2 while the cam a2 remains stationary. The mounting shaft a18 is used to mount the cam a2. A tapered connecting post a19 and a tapered connecting hole a20 are added to accommodate different specifications of the cam a2. A pin is inserted between the first strip-shaped pin groove a21 and the second strip-shaped pin groove a23 to achieve a fixed connection between the cam a2 and the mounting shaft a18.

[0070] A rotating sleeve a24 is linked to the lower center of the turntable a1. A clearance through hole a25 is passed through the middle of the rotating sleeve a24 to cooperate with the mounting shaft a18. The turntable drive mechanism includes a reducer a26 that is linked to the rotating sleeve a24.

[0071] The rotating sleeve a24 is used as a connecting component between the rotating disk a1 and the reducer a26. The rotating sleeve a24 achieves smooth rotation of the rotating disk a1 by making clearance fit with the mounting shaft a18 through the clearance hole a25, thus avoiding wear between the rotating disk a1 and the mounting shaft a18.

[0072] Each turntable a1 is provided with a material passage opening slot a27 corresponding to each set of gripper mechanisms. A feeding plate a28 is provided at each set of material passage opening slots a27. A strip-shaped detection hole a29 passes through the feeding plate a28. A material receiving sensor a30 is installed at the strip-shaped detection hole a29. The material receiving sensor a30 is fixed on the bracket a31. A second slider a32 is fixedly installed on the bracket a31. The second slider a32 is slidably connected to a second slide rail a33. The second slide rail a33 is fixed below the feeding plate a28. Several sets of fastening holes are provided on the second slide rail a33.

[0073] A material inlet slot a27 is provided to facilitate the entry of the filter into the turntable a1. A feed plate a28 and a material sensor a30 are added to detect the presence or position of the filter; once detected, the turntable a1 begins operation. The material sensor a30 is fixed to a bracket a31, which is slidably connected to a second slide rail a33 via a second slider a32. The second slide rail a33 is fixed below the feed plate a28 and has several sets of locking holes for adjusting the position of the material sensor a30.

[0074] The specific working principle of the rotary manipulator module A is as follows: When the filter enters the feed plate A28, the material sensor A30 detects the filter. The rotary table A1 drives the push block A3 to rotate around the cam A2. The push block A3 is pushed forward by the protrusion A13 on the cam A2, and the gripper A7 holds the filter. The rotary table A1 continues to rotate. When it reaches the other end of the protrusion A13, due to the action of the first limiting block A14, the gripper A7 will not gradually open. Instead, when the push block A3 moves to the point where the second limiting block A15 is completely misaligned with the first limiting block A14, the gripper A7 immediately releases, realizing the unloading of the filter.

[0075] like Figures 12 to 16The automatic sorting and arranging module b shown includes a conveyor belt b1, with pulleys b25 linked to both ends of the conveyor belt b1. The material conveying drive mechanism includes a second servo motor b26 linked to the pulleys b25. It also includes a left opening plate b2 and a right opening plate b3 relatively distributed on both sides of the conveyor belt b1. The left and right opening plates b2 and b3 are linked to an opening and closing drive mechanism that can drive them to move closer or further apart. The left opening plate b2, located on the side facing the right opening plate b3, has several sets of spaced-apart left pusher blocks b4. The right opening plate b2... The hinged plate b3 is located on the side facing the left opening hinged plate b2. Each set of left pusher blocks b4 is provided with a set of right receiving grooves b5. A set of left receiving grooves b6 is provided between each pair of adjacent sets of left pusher blocks b4, and a set of right pusher blocks b7 is provided between each pair of adjacent sets of right receiving grooves b5. When the left opening hinged plate b2 and the right opening hinged plate b3 are close to each other, each set of corresponding left pusher blocks b4 and right receiving grooves b5 forms a set of first sorting grooves, and each set of right pusher blocks b7 and left receiving grooves forms a set of second sorting grooves. The first sorting grooves and the second sorting grooves are staggered.

[0076] The opening and closing drive mechanism includes a mounting frame b11 distributed below the conveyor belt b1. Several sets of lead screws are hinged on the mounting frame b11. The upper part of the lead screw has a first thread b12 and the lower part has a second thread b13. The first thread b12 and the second thread b13 are symmetrical to each other. The lead screw is linked to the left nut sleeve b14 through the first thread b12 and to the right nut sleeve b15 through the second thread b13. The left nut sleeve b14 is linked to the left slider b16 and the right nut... The sleeve b15 is linked to the right slider b17, the left slider b16 is linked to the left opening and closing plate b2, and the right slider b17 is linked to the right opening and closing plate b3. The mounting bracket b11 is fixed with the first slide rail b18, and the left slider b16 and the right slider b17 are respectively slidably engaged with the first slide rail b18. The end of the lead screw is linked to the driven pulley b19, the driven pulley b19 is linked to the belt, the belt is linked to the driving pulley b20, and the driving pulley b20 is linked to the first servo motor fixed on the mounting bracket b11.

[0077] The first servo motor starts, driving the drive pulley b20 to rotate. The drive pulley b20 transmits power to the driven pulley b19 via a belt. The driven pulley b19 is linked to the end of the lead screw, thereby driving the lead screw to rotate. The lead screw has a first thread b12 and a second thread b13 that are symmetrically arranged. As the lead screw rotates, the left nut sleeve b14 moves upward on the first thread b12, and the right nut sleeve b15 moves downward on the second thread b13 (or in the opposite direction, depending on the direction of rotation of the lead screw). This allows the left nut sleeve b14 and the right nut sleeve b15 to move synchronously but in opposite directions. The left nut sleeve b14 is linked to the left slider b16, and the right nut sleeve b15 is linked to the right slider b17. As the nut sleeves move, the left slider b16 and the right slider b17 slide on the first slide rail b18 respectively, thereby causing the left opening plate b2 and the right opening plate b3 to move closer or separate relative to each other. When the left opening plate b2 and the right opening plate b3 approach each other, the first row of sorting grooves gradually forms between the left pusher block b4 and the right receiving trough b5, and the second row of sorting grooves gradually forms between the right pusher block b7 and the left receiving trough. The filters are accurately pushed into these sorting grooves by the conveyor belt b1, achieving automatic sorting and arrangement of the filters. The first slide rail b18 and the slider both transmit force and improve the movement stability of the left and right opening plates b2 and b3.

[0078] Both the left pusher block b4 and the right pusher block b7 have V-shaped guide grooves b8 at their ends. The opening of the V-shaped guide groove b8 on the left pusher block b4 faces the right opening plate b3, and the opening of the V-shaped guide groove b8 on the right pusher block b7 faces the left opening plate b2. The inner ends of both the left and right receiving grooves have V-shaped positioning edges b9. The outer ends of both the left and right receiving grooves have feed guide edges b10 connected to the V-shaped positioning edges b9. When the filter approaches the left and right pusher blocks b4 and b7, the opening design of the V-shaped guide groove b8 guides the filter smoothly into the sorting groove. The V-shaped structure of the V-shaped guide groove b8 automatically adjusts the position of the filter to align with the direction of the sorting groove, ensuring that the filter can enter the sorting groove accurately and stably. During the process of the filter entering the sorting slot, the feed guide edge b10 and the V-shaped positioning edge b9 are connected to form a continuous guide path, further guiding the filter to enter the sorting slot smoothly and accurately. This helps reduce friction and collisions of the filter during automatic sorting, improving the filter's transmission efficiency and the accuracy of sorting and arranging. As the left opening plate b2 and the right opening plate b3 gradually approach each other, the filter is pushed into the first and second sorting slots respectively. The V-shaped positioning edge b9 precisely positions the filter at the inner end of the sorting slot, preventing the filter from shifting during the sorting process.

[0079] The lead screw includes an upper body b21 and a lower body b22. A first thread b12 is located on the outer circumference of the upper body b21, and a second thread b13 is located on the outer circumference of the lower body b22. A connecting ring b23 is provided between the upper body b21 and the lower body b22. One end of the upper body b21 is hinged to the mounting bracket b11, and the other end is inserted into the connecting ring b23. One end of the lower body b22 is hinged to the mounting bracket b11, and the other end is inserted into the connecting ring b23. The side wall of the connecting ring b23 has an opening groove b24 that penetrates the side wall. The two sides of the opening groove b24 are detachably connected by screws. By dividing the lead screw into an upper body b21 and a lower body b22, the entire lead screw structure becomes more flexible and easier to disassemble and replace. The connecting ring b23 is used to connect the upper body b21 and the lower body b22, ensuring that they rotate as a whole. At the same time, the detachable connection is achieved through the opening groove b24 and screws.

[0080] A support frame b27 is provided between the two sets of pulleys b25. The conveyor belt b1 is fitted around the outer periphery of the support frame b27. Several sets of magnetic components b28 are provided between the support frame b27 and the conveyor belt b1. The magnetic components b28 are all fixed to the support frame b27 with screws, and are arranged equidistantly in a direction parallel to the conveyor belt b1. After the filter is transported onto the conveyor belt b1, the magnetic components b28 will generate an attractive force on the filter, so that the filter will not sway from side to side as it moves with the conveyor belt b1, and the position of the filter will not easily change. It should be noted that although the magnetic components b28 do not move with the conveyor belt b1, the way they generate an attractive force on the filter does not affect the forward movement of the conveyor belt b1, and the conveyor belt b1 can maintain normal operation; at the same time, the thrust of the left opening plate b2 and the right opening plate b3 is sufficient to overcome the attractive force of the magnetic components b28 to sort and arrange the filters. Meanwhile, the magnetic component b28 is designed separately from the conveyor belt b1, which facilitates the assembly and disassembly of the magnetic component b28. Furthermore, by controlling the speed of the second servo motor b26, the spacing between each pair of adjacent filter sets can be kept consistent, that is, equidistant feeding, so that the clamping mechanism can more accurately clamp several filter sets at the same time.

[0081] The automatic sorting and arranging module b works as follows: Driven by the second servo motor b26, the conveyor belt b1 continuously transports the filters from one end to between the left opening plate b2 and the right opening plate b3. When the filters reach the predetermined position, the opening and closing drive mechanism (composed of the first servo motor, belt, pulley, lead screw, nut sleeve, slider, etc.) is activated, driving the left opening plate b2 and the right opening plate b3 closer together. The left pusher block b4 on the left opening plate b2 and the right receiving groove b5 on the right opening plate b3 cooperate to form the first sorting groove. At the same time, the right pusher block b7 on the right opening plate b3 and the left receiving groove on the left opening plate b2 (formed by the left pusher block b4 at intervals) cooperate to form the second sorting groove. Guided by the V-shaped guide groove b8 and the feed guide edge b10, the filters are accurately pushed into these staggered sorting grooves, realizing the automatic sorting and arranging of the filters. In addition, the magnetic component b28 ensures that the filter remains stable during the conveying process, without shaking or deviating, and the filter can be fed at equal intervals by controlling the speed of the second servo motor b26.

[0082] like Figures 17 to 19 The filter transfer device d shown includes a transfer guide rail d1 mounted above the frame, a transfer frame d2 that reciprocates along the transfer guide rail d1, and an openable transfer clamping mechanism. A longitudinal drive assembly is provided between the transfer frame d2 and the transfer clamping mechanism to drive the transfer clamping mechanism to move vertically up and down. The longitudinal drive assembly includes lifting cylinders d3 located on both sides of the transfer frame d2, a second lifting plate d4 linked to the output end of the lifting cylinders d3, longitudinal synchronous pulleys mounted on the second lifting plate d4, and a longitudinal synchronous belt d5 sleeved between the longitudinal synchronous pulleys. A connecting block d6 is provided on the longitudinal synchronous belt d5, and the connecting block d6 is linked to a third lifting plate d7. A third slider is mounted on the third lifting plate d7, and the third slider is slidably connected to a third slide rail fixed to the second lifting plate d4. A fourth slider is installed on plate d4, and the fourth slider is slidably connected to a fourth slide rail fixed on the transfer frame d2. The transfer clamping mechanism includes a main clamp d8, a secondary clamp d9, and a clamping drive assembly that controls the opening and closing of the main clamp d8 and the secondary clamp d9. Both the main clamp d8 and the secondary clamp d9 are provided with several corresponding first V-shaped clamping slots. The corresponding first V-shaped clamping slots between the main clamp d8 and the secondary clamp d9 form quadrilateral clamping positions d10 that can clamp the filter. Each pair of adjacent quadrilateral clamping positions d10 are staggered. The clamping drive assembly includes open clamping cylinders d11 set on both sides of the main clamp d8 and the secondary clamp d9. The output end of the open clamping cylinders d11 is connected to the main clamp d8 and the secondary clamp d9 respectively, and drives the main clamp d8 and the secondary clamp d9 to move in opposite directions.

[0083] The lifting cylinder d3 controls the second lifting plate d4, which is equivalent to the transfer frame d2, to lift and lower. The longitudinal synchronous belt d5 can also control the second lifting plate d4 to lift and lower relative to the first lifting plate, thus achieving two-stage lifting and a longer lifting range. At the same time, the purpose of "every two adjacent sets of quadrilateral clamping positions d10 being staggered" is to clamp two rows of filters, improve production efficiency, simplify the equipment structure as much as possible, and reduce costs.

[0084] The lifting cylinder d3 can also be replaced with a lead screw, as long as it can control the reciprocating motion of the second lifting plate d4.

[0085] like Figures 20 to 23 The detection clamping fixture e shown includes a frame e1. The upper surface of the frame e1 is provided with several sets of spaced product detection positioning holes. A set of sealing disc assemblies e2 is fixed at each set of product detection positioning holes. The sealing disc assemblies e2 are linked to a spindle e4. The upper end of the spindle e4 is sealed with a threaded connector e3. The spindle e4 is linked to a spindle drive mechanism that can drive the spindle e4 to rotate. A first lifting plate e5 is provided inside the frame e1. The first lifting plate e5 is provided with a linkage hole e6 corresponding to each set of spindles e4. The lower part of the spindle e4 passes through the linkage hole e6. A buffer spring e7 is provided above the first lifting plate e5 and sleeved on the outer periphery of the spindle e4. The upper end of the buffer spring e7 abuts against a third limiting block e8. The third limiting block e8 is sleeved on the outer periphery of the spindle e4 and fixedly connected to the spindle e4. The lower end of the buffer spring e7 abuts against the first lifting plate e5. The spindle e4 is linked to a transmission component distributed below the first lifting plate e5. The first lifting plate e5 is linked to the lifting drive mechanism. The lifting drive mechanism moves the first lifting plate e5, which in turn drives all the main shafts e4 to move downwards synchronously through all transmission components. This achieves sealing of the lower end face of the filter, ensuring uniform force on all filters during testing and improving testing accuracy and efficiency. Unified control of the first lifting plate e5 avoids the problem of asynchronous operation of multiple sets of cylinders e12. Furthermore, a buffer spring e7 is provided. When the threaded connector e3 is not installed with the filter, the main shaft e4 can be compressed and moved downwards a small distance. When the threaded connector e3 begins to connect with the threaded hole at the end of the filter, the buffer spring e7 helps the main shaft e4 to slowly return to its original position, preventing interference between the threaded connector e3 and the filter.

[0086] The lifting drive mechanism includes several sets of rollers e9. The first lifting plate e5 is provided with several sets of mounting slots. Each set of rollers e9 is hinged in a set of mounting slots. A pusher e10 is provided on one side of the rollers e9. The pusher e10 is linked to a cylinder e12. The end of the pusher e10 facing the rollers e9 is provided with a push inclined surface e11. A return spring e13 is linked below the first lifting plate e5. The upper end of the return spring e13 abuts against the first lifting plate e5, and the lower end abuts against the frame e1. A fifth slider e14 is fixed above the pusher e10. The fifth slider e14 is slidably engaged with a fifth slide rail e15. The fifth slide rail e15 is fixed to the frame e1. After the filter is installed and connected to the threaded connector e3, the cylinder e12 starts working, pushing the pusher e10 to slide along the fifth slide rail e15. The pushing inclined surface e11 of the pusher e10 contacts the roller e9 and generates thrust, causing the roller e9 to rotate in the mounting groove and push the first lifting plate e5 down. During the descent of the first lifting plate e5, the return spring e13 is compressed, providing an upward elastic force to the first lifting plate e5. When the cylinder e12 stops working, the elastic force of the return spring e13 pushes the first lifting plate e5 up, returning it to its initial position. At the same time, the sliding of the fifth slider e14 on the fifth slide rail e15 ensures the stable movement of the pusher e10 and the roller e9, avoiding wobbling and deviation. The roller e9 and the pushing inclined surface e11 use a rolling pushing form, which can generate a large thrust and respond quickly, thus ensuring that the first lifting plate e5 can descend smoothly and quickly.

[0087] A guide block e16 is also provided at the mounting slot. The guide block e16 has a rolling clearance hole in its center, which is fitted around the outer periphery of the roller e9. The roller e9 is hinged within the rolling clearance hole, and its end is higher than the end face of the guide block e16. A sliding inclined surface e17 is provided on the side of the guide block e16 facing the pusher e10. When the pusher e10 slides along the fifth slide rail e15 under the push of the cylinder e12, and generates thrust by contacting the roller e9 through the pushing inclined surface e11, the roller e9 will roll within the rolling clearance hole of the guide block e16. Because the end of the roller e9 is higher than the end face of the guide block e16, the pusher e10 can smoothly drive the roller e9 to roll without being obstructed by the guide block e16. Meanwhile, the guide block e16 is provided with a sliding inclined surface e17 on the side facing the pusher e10. When the pusher e10 contacts the guide block e16, the sliding inclined surface e17 can guide the pusher e10 to move smoothly, avoiding impact and shaking.

[0088] A planar bearing e18 is provided between the buffer spring e7 and the first lifting plate e5. The planar bearing e18 is sleeved on the outer circumference of the main shaft e4, and its lower end face is fixed to the first lifting plate e5. The upper end face of the planar bearing e18 abuts against the lower end of the buffer spring e7. Since the upper end of the buffer spring e7 is in contact with the third limiting block e8, when the main shaft e4 rotates, the buffer spring e7 will be driven to rotate. Due to its structural characteristics, the upper end face of the planar bearing e18 can rotate with the buffer spring e7, while its lower end face is fixed to the first lifting plate e5. This can prevent the end of the buffer spring e7 from scratching the first lifting plate e5, thus protecting the first lifting plate e5 and the spring.

[0089] The first lifting plate e5 is located below the linkage hole e6 and has a countersunk hole e19. The transmission component includes a bearing assembly e20 sleeved on the outer circumference of the main shaft e4. Below the bearing assembly e20 is a fourth limiting block e21 fixed on the main shaft e4. The outer diameter of the bearing assembly e20 is larger than the inner diameter of the linkage hole e6 but smaller than the inner diameter of the countersunk hole e19. If the threaded connector e3 is successfully installed with the filter, the bearing assembly e20 is located in the countersunk hole e19. When the main shaft e4 rotates, the bearing assembly e20 can prevent the main shaft e4 from scraping against the first lifting plate e5. When the main shaft e4 moves down slowly, the bearing assembly e20 will move down with it until the threaded connector e3 is installed with the filter. Then, under the action of the buffer spring e7, the main shaft e4 will slowly rise until the bearing assembly e20 also rises to the position of the countersunk hole e19.

[0090] The sealing disc assembly e2 includes a mounting base e22 fixed at the product inspection and positioning hole. An upper sealing seat e23 is linked to the mounting base e22 via several sets of bearings. The upper sealing seat e23 is fitted onto the outer periphery of the main shaft e4 via several sets of bearings. Several sets of Y-type sealing rings e24 are also provided between the upper sealing seat e23 and the main shaft e4. A sealing disc e25, capable of sealing the lower end face of the filter, is fixed to the upper end of the upper sealing seat e23. The sealing disc e25 has a through hole in its center that fits with the main shaft e4 with a clearance. The mounting base e22 is fixed at the product inspection and positioning hole, serving as the support for the entire sealing disc assembly e2. The upper sealing seat e23, fitted onto the outer periphery of the main shaft e4 via several sets of bearings, allows the upper sealing seat e23 to rotate around the main shaft e4 or make slight axial movements. The Y-type sealing rings e24 have good elasticity and sealing performance, capable of adapting to slight changes in the clearance between the main shaft e4 and the upper sealing seat e23. The sealing disc e25 is used to fit tightly against the lower end face of the filter to form an effective seal.

[0091] The main shaft e4 has an air inlet e26 running through it along the axial direction. The threaded connector e3 has an air outlet e27 running through it along the axial direction and communicating with the air inlet e26. The lower end face of the frame e1 has a set of axial positioning holes corresponding to each set of main shafts e4. A lower sealing seat e28 is installed at the axial positioning hole. The lower sealing seat e28 is linked to the main shaft e4 through a bearing. A Y-type sealing ring e24 is also provided between the main shaft e4 and the lower sealing seat e28. The lower sealing seat e28 has an air inlet chamber e29 that communicates with the air inlet e26. The side wall of the lower sealing seat e28 has an air inlet nozzle e30 for inflating the air inlet chamber e29. During the test, an external air source inflates the air inlet chamber e29 through the air inlet nozzle e30. The gas enters the filter through the air inlet e26 and the air outlet e27 for air tightness testing. By directly incorporating the intake duct e26 within the main shaft e4 and the exhaust duct e27 within the threaded connector e3, the gas flow path is significantly simplified, the number of connections is reduced, thereby lowering the risk of gas leakage and improving the accuracy and efficiency of filter airtightness testing. The lower sealing seat e28 is linked to the main shaft e4 via a bearing and is equipped with a Y-type sealing ring e24 to ensure the sealing of the intake chamber e29.

[0092] The spindle drive mechanism includes a fifth servo motor e31 mounted on one side of the frame e1. The output of the fifth servo motor e31 is linked to a drive gear e32. A driven gear e33 is fixedly connected to the outer periphery of the spindle e4. A set of transmission gears e34 is provided between each pair of adjacent spindles e4. Each set of transmission gears e34 meshes with two adjacent sets of driven gears e33. The transmission gears e34 are rotatably mounted on the frame e1. The driven gears e33 located on the spindle e4 closest to the fifth servo motor e31 mesh with the drive gear e32. The fifth servo motor e31 drives the drive gear e32 to rotate, which in turn drives the driven gears e33 to rotate. Through the transmission gears e34, all spindles e4 rotate synchronously.

[0093] The specific working principle of the clamping fixture e: The filter is placed above the threaded connector e3 using a filter transfer device, and the filter is slowly pushed downwards to connect with the threaded connector e3. During this process, the spindle e4 continues to rotate forward under the drive of the spindle drive mechanism. A portion of the threaded connector e3 is successfully installed with the filter, and the spindle e4 does not move downwards in this part. Another portion of the threaded connector e3 connects to the threaded hole at the end of the filter later. This is mainly because the helical inlet position of the threaded hole at the end of each filter cannot correctly correspond to the helical inlet of the threaded connector e3. Therefore, in this case, the spindle e4 is pressed down, thus moving downwards and compressing the buffer spring e7, until the spindle e4 rotates to the point where the threaded connector e3 begins to connect with the threaded hole at the end of the filter. During this process, the buffer spring e7 drives the spindle e4 to return to its original position until the filter is installed on the threaded connector e3. After the filter is installed, the fifth servo motor e31 stops working. Next, cylinder e12 starts working, pushing pusher e10 to slide along the fifth slide rail e15. The pushing inclined surface e11 of pusher e10 contacts roller e9 and generates thrust, causing roller e9 to rotate in the mounting slot and push the first lifting plate e5 down. During the descent of the first lifting plate e5, return spring e13 is compressed, providing an upward elastic force to the first lifting plate e5. The first lifting plate e5 drives the main shaft e4 to move down through the pushing bearing assembly e20. During this period, the sealing disc assembly e2 does not reciprocate, so the filter follows the main shaft e4 down until the end face of the filter contacts the upper end face of the sealing disc e25, sealing the end face of the filter and assisting in subsequent airtightness testing. When cylinder e12 stops working, the elastic force of return spring e13 pushes the first lifting plate e5 up, returning it to its initial position. Then, the fifth servo motor e31 reverses, and the filter transfer device slowly lifts the filter.

[0094] like Figures 24 to 26 The tilting mechanism g shown includes a base g1, which is rotatably connected to an active tilting shaft A g2 and an active tilting shaft B g3 via bearings. The active tilting shafts A g2 and B g3 are parallel to each other and spaced apart. An active tilting shaft A driven tilting shaft G4 is located on the side of the active tilting shaft A g2 away from the active tilting shaft B g3, and an active tilting shaft B driven tilting shaft G5 is located on the side of the active tilting shaft A g2 away from the active tilting shaft B g5. A first transmission gear set is provided between the active tilting shafts A g2 and A driven tilting shaft A g4, and a second transmission gear set is provided between the active tilting shafts B g3 and B driven tilting shaft B g5. A left servo motor g13 is linked to the end of the active tilting shaft A g2, and a right servo motor g14 is linked to the end of the active tilting shaft B g3.

[0095] The first transmission gear set includes a first driving gear g6 fixed on the A driving rotating shaft g2, and the first driving gear g6 meshes with a first driven gear g7 fixed on the A driven rotating shaft g4; the second transmission gear set includes a second driving gear g8 fixed on the B driving rotating shaft g3, and the second driving gear g8 meshes with a second driven gear g9 fixed on the B driven rotating shaft g5.

[0096] A rotating shaft g10 is connected to the lower center of the base g1. The axis of the rotating shaft g10 is perpendicular to the axis of the active flipping shaft g2. A divider g11 is connected to the lower end of the rotating shaft g10. The divider g11 drives the base g1 to rotate around the central axis of the rotating shaft g10 via the rotating shaft g10. The divider g11 can be controlled by a geared motor, and the divider g11 then drives the base g1 to rotate horizontally (e.g., 180 degrees or the required angle, depending on the actual situation) via the rotating shaft g10.

[0097] Position sensors g12 are fixed on both sides of the base g1. One set of position sensors g12 is distributed between the A active tilting shaft g2 and the A driven tilting shaft g4, and the other set of position sensors g12 is distributed between the B active tilting shaft g3 and the B driven tilting shaft g5. A left connecting block d6g16 is fixed on the A driven tilting shaft g4, and a right connecting block d6g15 is fixed on the B driven tilting shaft g5. The left connecting block d6g16 and the right connecting block d6g15 are respectively connected to the filter linkage plate g17 by screws. The position sensors g12 are used to detect the position information of the filter linkage plate g17, that is, to detect the position of the filter. When the tilting shaft rotates, the connecting block d6 moves accordingly, thereby driving the filter on the filter linkage plate g17 to tilt and be detected. The position sensor g12 can capture these movement information in real time and convert them into electrical signals for transmission and processing. For example, after the air tightness test is completed, it is lifted from the water tank h to the initial position, or the filter is transferred to the filter linkage plate g17 by the filter transfer mechanism, and the corresponding signal can be output, and the servo motor and the divider g11 can work.

[0098] The base g1 has several sets of anti-vibration blocks g18 on its side corresponding to the filter linkage plate g17. When the filter linkage plate g17 is flipped to its original position, it prevents the filter linkage plate g17 from colliding with the base g1.

[0099] A support seat g19 is fixed above the middle of the base g1. Two sets of support holes are provided above the support seat g19. The middle parts of the A active tilting shaft g2 and the B active tilting shaft g3 are respectively linked to the support holes via bearings. This improves the structural stability of the A active tilting shaft g2 and the B active tilting shaft g3, making them less prone to bending.

[0100] A cable tray g20 is detachably connected to the upper end of the support base g19 via screws. A cable collection compartment is located above the cable tray g20, and two symmetrically distributed cable outlet compartments g21 are located below the cable tray g20. The two sets of cable outlet compartments g21 are positioned on either side of the support base g19. Electrical wires or cables are first collected inside the cable tray g20, and then enter the cable collection compartment from the top of the cable tray g20 for storage and organization.

[0101] The specific working principle of the flipping mechanism g: If the filter linkage plate g17 at the A driven flipping shaft g4 is located at the filter loading position, the B driven flipping shaft g5 will flip to the water tank h for air tightness testing. After the filter is installed on the A driven flipping shaft g4, and after the filter at the B driven flipping shaft g5 completes the air tightness test, the B driven flipping shaft g5 will flip to detach from the water tank h (the position sensor g12 will detect the filter information, and the servo motor will only operate and the divider g11 will only rotate after flipping to the correct angle). Therefore, testing and loading can be performed simultaneously. The divider g11 is controlled by a geared motor. The divider g11 then drives the base g1 to rotate horizontally via the rotating shaft g10. The filter linkage plate g17 at the driven flip shaft g4 rotates to the airtightness test position and then flips into the water tank h for airtightness test. At the same time, the filter linkage plate g17 at the driven flip shaft g5 rotates to the feeding position, the filter is removed, and the next filter to be tested is transferred.

[0102] The flipping mechanism g, through the cooperation of two sets of left and right flipping shafts and servo motors, enables simultaneous detection and loading (for example, when the A active flipping shaft g2 drives a set of filters for detection, the B active flipping shaft g3 can prepare the next set of filters or perform detection on another set of filters), allowing the detection and transfer processes of filters to be carried out in parallel, reducing waiting time and improving overall work efficiency.

[0103] like Figure 3 The automatic discharge conveyor belt f shown has discharge pulleys linked at both ends. A fourth servo motor is linked at the end of a set of discharge pulleys. The end of the automatic discharge conveyor belt f is provided with a discharge transition frame f1 fixed on the frame. Several sets of third rollers f2 are hinged in the middle of the discharge transition frame f1.

[0104] The discharge transition frame f1 provides a smooth transition platform, ensuring the filter remains stable when transferred from the automatic discharge conveyor to the next stage (such as another conveyor line or subsequent processing equipment), avoiding impact and damage caused by direct drops or sudden changes in direction. The third roller f2 is installed in the middle of the discharge transition frame f1. Its main function is to support the filter and reduce frictional resistance during the transition by rolling, allowing the filter to move more smoothly.

[0105] Working principle of the whole machine: The storage belt c delivers the filters sequentially. When the filter enters the feed plate a28, the feed sensor a30 senses the filter, and the turntable a1 drives the push block a3 to rotate around the cam a2. The push block a3 is pushed forward by the protrusion a13 on the cam a2, and the gripper a7 holds the filter. The turntable a1 continues to rotate. When it reaches the other end of the protrusion a13, due to the action of the first limit block a14, the gripper a7 will not gradually open. Instead, when the push block a3 moves to the point where the second limit block a15 is completely misaligned with the first limit block a14, the gripper a7 immediately releases, realizing the discharge. The conveyor belt b1, driven by the second servo motor b26, continuously transports the filter from one end to between the left opening plate b2 and the right opening plate b3. The opening and closing drive mechanism is activated, driving the left opening plate b2 and the right opening plate b3 to move closer together. The left pusher block b4 on the left opening plate b2 and the right receiving trough b5 on the right opening plate b3 cooperate to form the first row of sorting slots. At the same time, the right pusher block b7 on the right opening plate b3 and the left receiving trough on the left opening plate b2 (formed by the left pusher blocks b4 spaced apart) cooperate to form the second row of sorting slots. Guided by the V-shaped guide groove b8 and the feed guide edge b10, the filter is accurately pushed into these staggered sorting slots, realizing the automatic sorting and arrangement of the filter. The filter transfer device d transfers the filter to a set of testing clamping fixtures e (this testing clamping fixture e is detached from the water tank h and facing upwards, while another set of testing clamping fixtures e has been flipped into the water tank h for air tightness testing). When the other set of testing clamping fixtures e has completed the test, it flips upwards and detaches from the water tank h. The base g1 rotates and the two sets of positions are reversed. The filter that has completed the test is taken away by the filter transfer device d and transported to the automatic discharge conveyor belt f. The filter to be tested is flipped into the water tank h for air tightness testing.

Claims

1. A filter air tightness testing device, comprising a frame, an automatic sorting and feeding device, and an air tightness testing device, wherein an automatic discharge conveyor belt is provided between the automatic sorting and feeding device and the air tightness testing device, and a filter transfer device is provided above the automatic discharge conveyor belt; the air tightness testing device includes a water tank, at least two sets of testing clamping fixtures, and a flipping mechanism linked to the testing clamping fixtures; the automatic sorting and feeding device includes a conveyor belt and left and right opening and closing plates relatively distributed on both sides of the conveyor belt, with pulleys linked to both ends of the conveyor belt, the pulleys being linked to a second servo motor, and the left and right opening and closing plates being linked to an opening and closing drive mechanism capable of driving the left and right opening and closing plates to move closer or separate, characterized in that: The left opening plate has several sets of left push blocks spaced apart on the side facing the right opening plate. The right opening plate has a set of right receiving grooves for each set of left push blocks on the side facing the left opening plate. A set of left receiving grooves is set between each pair of adjacent sets of left push blocks, and a set of right push blocks is set between each pair of adjacent sets of right receiving grooves. When the left and right opening plates are close to each other, each set of corresponding left push blocks and right receiving grooves forms a first column of sorting grooves, and each set of right push blocks and left receiving grooves forms a second column of sorting grooves. The first column of sorting grooves and the second column of sorting grooves are staggered.

2. The filter airtightness testing device according to claim 1, characterized in that: The opening and closing drive mechanism includes a mounting frame disposed below the conveyor belt. Several sets of lead screws are hinged on the mounting frame. The upper part of the lead screw has a first section of thread, and the lower part has a second section of thread. The first section of thread and the second section of thread are symmetrical to each other. The lead screw is linked to a left nut sleeve through the first section of thread, and the lead screw is linked to a right nut sleeve through the second section of thread. The left nut sleeve is linked to a left slider, and the right nut sleeve is linked to a right slider. The left slider is linked to a left opening and closing plate, and the right slider is linked to a right opening and closing plate. A first slide rail is fixed on the mounting frame, and the left slider and the right slider are respectively slidably engaged with the first slide rail. A driven pulley is linked to the end of the lead screw, the driven pulley is linked to a belt, the belt is linked to a driving pulley, and the driving pulley is linked to a first servo motor fixed on the mounting frame.

3. The filter airtightness testing device according to claim 2, characterized in that: The feed end of the conveyor belt is equipped with a turntable and a turntable drive mechanism for driving the turntable to rotate. The turntable has several sets of gripper mechanisms arranged circumferentially. A cam is hinged to the center of the turntable. A push block is arranged between the gripper mechanism and the cam. The turntable drive mechanism can drive the turntable to rotate around the cam. Each set of push blocks on the turntable has a set of sliding grooves. A first slider adapted to the sliding groove is linked below the push block. One end of the push block is in contact with the outer circumferential surface of the cam, and the other end extends to the center of the gripper mechanism. Pushing inclined surfaces are symmetrically arranged on both sides of the push block. The gripper mechanism includes two sets of symmetrically distributed grippers. One end of each set of grippers extends to the pushing inclined surface, and the middle is hinged to the turntable. Each set of grippers is linked to a set of elastic reset mechanisms. The mechanism includes a spring seat fixed on a turntable. The spring seat has a first mounting hole on its side facing the gripper. A gripper return spring is installed in the first mounting hole. A push pin is linked to the end of the gripper return spring. A guide bar is provided between one end and the middle of the gripper. The push pin is kept in contact with the guide bar under the push of the gripper return spring. A first roller is hinged to one end of the push block. The first roller rolls in contact with the outer peripheral surface of the cam. The outer peripheral surface of the cam has at least one set of protrusions. The two ends of the protrusions are curved at the connection points with the cam. A first limiting block is fixed to the cam at the end of the protrusion. A second limiting block is linked above the push block. A second roller is hinged to one end of the gripper. The second roller rolls in contact with the push inclined surface.

4. The filter airtightness testing device according to claim 3, characterized in that: The turntable is provided with a material passage opening slot corresponding to each set of gripper mechanisms. A feeding plate is provided at each set of material passage opening slots. A strip-shaped detection hole is passed through the feeding plate. A material receiving sensor is installed at the strip-shaped detection hole. The material receiving sensor is fixed on the bracket. A second slider is fixedly installed on the bracket. The second slider is slidably connected to a second slide rail. The second slide rail is fixed below the feeding plate. Several sets of fastening holes are provided on the second slide rail.

5. The filter airtightness testing device according to claim 4, characterized in that: The turntable has a second mounting hole in the middle, and a bearing is installed in the second mounting hole. The bearing is linked to a mounting shaft. The upper end of the mounting shaft is provided with a tapered connecting column. The middle part of the cam and the upper end of the tapered connecting column are both provided with connecting holes. The outer periphery of the tapered connecting column is provided with a first strip-shaped pin groove. The lower part of the cam is provided with a tapered insertion hole adapted to the tapered connecting column. The side wall of the tapered insertion hole is provided with a second strip-shaped pin groove corresponding to the first strip-shaped pin groove. The second strip-shaped pin groove passes through the cam.

6. The filter airtightness testing device according to claim 1, characterized in that: The flipping mechanism includes a base, on which an A-type active flipping shaft and a B-type active flipping shaft are rotatably connected via bearings. The A-type and B-type active flipping shafts are parallel to each other and spaced apart. An A-type driven flipping shaft is located on the side of the A-type active flipping shaft furthest from the B-type active flipping shaft, and a B-type driven flipping shaft is located on the side of the A-type driven flipping shaft furthest from the A-type active flipping shaft. A first transmission gear set is provided between the A-type and A-type driven flipping shafts, and a second transmission gear set is provided between the B-type and B-type driven flipping shafts. A left servo motor is linked to the end of the A-type active flipping shaft, and a right servo motor is linked to the end of the B-type active flipping shaft. The base is connected to a lower part of its middle section. The system has a rotating shaft, the axis of which is perpendicular to the axis of the active flip shaft A. A divider is linked to the lower end of the rotating shaft, and the divider drives the base to rotate around the central axis of the rotating shaft. Position sensors are fixed on both sides of the base. One set of position sensors is distributed between the active flip shaft A and the driven flip shaft A, and another set of position sensors is distributed between the active flip shaft B and the driven flip shaft B. A left connecting block is fixed on the driven flip shaft A, and a right connecting block is fixed on the driven flip shaft B. The left and right connecting blocks are respectively connected to filter linkage plates by screws. Each set of detection clamping fixtures is installed on each set of filter linkage plates.

7. The filter airtightness testing device according to claim 6, characterized in that: The detection clamping fixture includes a frame. Several sets of spaced-apart sealing disc assemblies are fixed to the upper surface of the frame. Each sealing disc assembly is linked to a spindle. A threaded connector is sealed to the upper end of the spindle. The spindle is linked to a spindle drive mechanism capable of rotating. A first lifting plate is provided within the frame. The first lifting plate has linkage holes corresponding to each set of spindles. The lower part of the spindle passes through these linkage holes. A buffer spring is provided above the first lifting plate, sleeved on the outer circumference of the spindle. The upper end of the buffer spring abuts against a third limiting block, which is sleeved on the outer circumference of the spindle and fixedly connected to it. A planar bearing is provided between the buffer spring and the first lifting plate. The planar bearing is sleeved on the outer circumference of the spindle, with its lower end fixed to the first lifting plate. The upper end of the planar bearing... The lower end of the buffer spring is in contact with the main shaft; the main shaft is linked to a transmission component distributed below the first lifting plate. The first lifting plate has a countersunk hole below the linkage hole. The transmission component includes a bearing assembly sleeved on the outer circumference of the main shaft. A fourth limiting block fixed on the main shaft is provided below the bearing assembly. The outer diameter of the bearing assembly is larger than the inner diameter of the linkage hole and smaller than the inner diameter of the countersunk hole. The first lifting plate is linked to a lifting drive mechanism. The lifting drive mechanism includes several sets of rollers. The first lifting plate has several sets of mounting slots. Each set of rollers is hinged in a set of mounting slots. A pusher is provided on one side of the roller. The pusher is linked to a cylinder. The end of the pusher facing the roller has a pushing slope. A return spring is linked below the first lifting plate. The upper end of the return spring is in contact with the first lifting plate and the lower end is in contact with the frame.

8. The filter airtightness testing device according to claim 7, characterized in that: The main shaft has an air intake channel that runs through the axis, and the threaded connector has an air outlet channel that runs through the axis and communicates with the air intake channel. The lower end face of the frame has a set of axial positioning holes corresponding to each set of main shafts. A lower sealing seat is installed at the axial positioning hole. 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 intake chamber is provided inside the sealing seat and communicates with the air intake channel. An air inlet is provided on the side wall of the lower sealing seat for inflating the air intake chamber.

9. The filter air tightness testing device according to any one of claims 1 to 8, characterized in that: The filter transfer device includes a transfer guide rail mounted above the frame, a transfer frame that reciprocates along the transfer guide rail, and an openable transfer clamping mechanism. A longitudinal drive assembly is provided between the transfer frame and the transfer clamping mechanism to drive the transfer clamping mechanism to move vertically up and down. The longitudinal drive assembly includes lifting cylinders located on both sides of the transfer frame, a second lifting plate linked to the output end of the lifting cylinders, longitudinal synchronous pulleys mounted on the second lifting plate, and a longitudinal synchronous belt sleeved between the longitudinal synchronous pulleys. A connecting block is provided on the longitudinal synchronous belt, and the connecting block is linked to a third lifting plate. A third slider is mounted on the third lifting plate, and the third slider is slidably connected to a third slide rail fixed to the second lifting plate. The second lifting plate is equipped with a fourth slider, which is slidably connected to a fourth slide rail fixed on the transfer frame. The transfer clamping mechanism includes a main clamp, a secondary clamp, and a clamping drive assembly for controlling the opening and closing of the main clamp and the secondary clamp. The main clamp and the secondary clamp are each provided with a number of corresponding first V-shaped clamping slots. The corresponding first V-shaped clamping slots between the main clamp and the secondary clamp form quadrilateral clamping positions for clamping the filter. Each pair of adjacent quadrilateral clamping positions is staggered. The clamping drive assembly includes open clamping cylinders disposed on both sides of the main clamp and the secondary clamp. The output ends of the open clamping cylinders are respectively connected to the main clamp and the secondary clamp, and drive the main clamp and the secondary clamp to move in opposite directions.

10. The filter air tightness testing device according to any one of claims 2 to 8, characterized in that: The frame is also equipped with a storage belt distributed on one side of the turntable. Both ends of the storage belt are linked to sprockets, and the sprockets are linked to a third servo motor. A guide rail is provided above the storage belt. Both ends of the guide rail are inclined toward one side of the storage belt, and the middle part of the guide rail is close to the other side of the storage belt.

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