Filter paper cartridge skeleton assembly production line

Abstract

The present invention belongs to the field of assembly equipment for oil filter elements, and specifically relates to an assembly production line for a filter paper tube skeleton of a filter, comprising a lower end cover loading device, a bracket loading device, a paper tube loading device, a bracket opening device, a sleeve loading device and an upper end cover loading device which are sequentially arranged along the conveying direction of a conveyor belt, a pallet is provided on the conveyor belt, guide bars for the pallet are provided on both sides of the conveyor belt, a positioning groove which is matched with the outer dimensions of the lower end cover is provided on the pallet, the bracket loading device is used for loading the diffuser bracket with closed spring clips, a plug-in groove for the bracket main body is provided on the lower end cover, and the bracket opening device is used for opening the spring clip, the lower end cover loading device, the bracket loading device, the paper tube loading device, the bracket opening device, the sleeve loading device and the upper end cover loading device are respectively matched with a slide module and connected to the slider of the slide module, which can improve the degree of automation and work efficiency of the assembly operation and effectively reduce manual labor.

Description

Technical Field

[0001] The invention belongs to the field of assembly equipment for oil filter elements, and in particular relates to an assembly production line for a filter paper cylinder skeleton of a filter. Background Art

[0002] The filter element consists of a cylindrical sleeve, an upper end cap, a lower end cap, and a paper tube. The filter paper used in traditional filter elements is folded into a wavy pattern. As the engine continues to run, impurities such as metal debris in the oil accumulate on the filter paper. When the impurities accumulate to a certain level, the filter element becomes clogged, significantly reducing the filter flow rate. To combat filter element clogging, existing filters typically feature a bypass valve. When the filter element becomes clogged, the bypass valve opens, allowing unfiltered oil to enter the oil circuit directly. However, this can result in a large amount of impurities entering the engine along with the oil. Furthermore, over time, the paper tube's permeability decreases and its resistance increases, making it susceptible to squeezing, causing the filter paper to deviate and accumulate. This not only further reduces oil permeability but also makes it more likely for impurity accumulation and blockage.

[0003] Therefore, a patent application document with publication number CN120042675A appeared. The patent application document disclosed an oil dispersion filter element, which was formed by adding an approximately V-shaped dispersion bracket on the cylindrical sleeve and adding a paper storage structure at the trough of the paper tube. The dispersion bracket was arranged in the crest of the paper tube to provide support for the filter paper tube to prevent the filter paper from deviation and accumulation. When the permeability of the filter layer decreases and the pressure difference of the oil inside and outside the cylindrical sleeve increases, the opening angle of the dispersion bracket is reduced, exposing the relatively clean filtering surface of the paper storage structure in the trough of the filter layer, which can effectively improve the oil dispersion efficiency and delay the start-up of the bypass valve.

[0004] Currently, there is no assembly production line for the cylindrical sleeve, diffuser bracket and paper tube suitable for this filter element. The cylindrical sleeve, diffuser bracket and paper tube, upper end cover and lower end cover are mainly assembled by manual labor. The assembly of the diffuser bracket is labor-intensive, requires a lot of manpower, and has low assembly efficiency. Summary of the Invention

[0005] In order to solve the problems existing in the above-mentioned prior art, the present invention provides a filter paper cylinder skeleton assembly production line for a filter, which can improve the automation level and work efficiency of the assembly operation and effectively reduce manual labor.

[0006] The specific technical solution adopted in the present invention is:

[0007] The filter paper tube skeleton assembly production line of the filter, the skeleton includes an upper end cover, a cylindrical sleeve, a lower end cover and a diffuser bracket, the diffuser bracket includes a bracket body and spring plates arranged on the left and right sides of the bracket body, and the spring plates have the freedom to open and close, and are characterized in that: the production line includes a lower end cover loading device, a bracket loading device, a paper tube loading device, a bracket opening device, a sleeve loading device and an upper end cover loading device which are arranged in sequence along the conveying direction of the conveyor belt, a tray is provided on the conveyor belt, and guide strips of the tray are provided on both sides of the conveyor belt, and a positioning groove is provided on the tray which is matched with the outer size of the lower end cover, the bracket loading device is used to load the diffuser bracket closed by the spring plate, the lower end cover is provided with a plug-in slot of the bracket body, and the bracket opening device is used to open the spring plate, and the lower end cover loading device, the bracket loading device, the paper tube loading device, the bracket opening device, the sleeve loading device and the upper end cover loading device are respectively equipped with a slide module and connected to the slider of the slide module.

[0008] The lower end cover feeding device includes a first clamping jaw, the sleeve feeding device includes a third clamping jaw, and the upper end cover feeding device includes a fourth clamping jaw.

[0009] The bracket loading device is a second clamping jaw.

[0010] The bracket loading device includes a first mounting seat, an annular base and a sandwich block. The annular base is fixedly connected to the first mounting seat. A slot matching the bracket body is provided on the inner wall of the annular base. The sandwich block is coaxially arranged with the inner cavity of the annular base and matches to clamp the bracket body. The sandwich block is connected to the first mounting seat by means of a first telescopic rod and has the freedom to rise and fall relative to the annular base.

[0011] The paper roll feeding device includes a second mounting seat, a parallel clamping jaw and a guide shaft. The parallel clamping jaw is arranged perpendicular to the guide shaft and horizontally on the second mounting seat. The clamping end of the parallel clamping jaw is arranged in an arc shape. The guide shaft is connected to the second mounting seat by means of a second telescopic rod and has the freedom to rise and fall relative to the parallel clamping jaw. The axis of the guide shaft passes through the midpoint of the line connecting the centers of the two clamping ends.

[0012] The bracket opening device includes a lifting rod, an upper ring and a lower ring arranged on the fourth mounting seat, the upper ring and the lower ring being coaxially arranged and rotatably connected to the fourth mounting seat, the upper ring is provided with an upper slide groove and a first deflector rod, the lower ring is provided with a lower slide groove and a second deflector rod, the first deflector rod and the second deflector rod are arranged in pairs along the radial direction of the upper ring, and the first deflector rod and the second deflector rod are inserted into the two elastic pieces of each bracket body, the lifting rod is respectively provided with an upper protrusion matching the upper slide groove and a lower protrusion matching the lower slide groove, the lifting rod has the freedom to move along its own axis on the fourth mounting seat by means of the driving unit, the lifting rod moves and drives the upper ring and the lower ring to rotate in opposite directions by means of the upper protrusion and the lower protrusion, and a return spring is respectively provided between the fourth mounting seat and the upper ring and the lower ring.

[0013] The upper and lower protrusions are trapezoidal and symmetrically arranged along the axis of the upper ring. The inclined surface of the upper protrusion contacts the bottom edge of the upper slide groove to form a driving fit, and the inclined surface of the lower protrusion contacts the bottom edge of the lower slide groove to form a driving fit.

[0014] The fourth mounting seat is provided with a sleeve, and the upper end of the sleeve is provided with a convex edge. The convex edge is overlapped on the fourth mounting seat and connected to the fourth mounting seat by means of bolts. The lower end of the sleeve passes through the fourth mounting seat and cantilevers downward. The upper retaining ring and the lower retaining ring are sequentially spaced along the axial direction of the sleeve. The upper ring and the lower ring are both set with the sleeve. The fourth mounting seat cooperates with the upper retaining ring to form an axial limit of the upper ring, and the upper retaining ring cooperates with the lower retaining ring to form an axial limit of the lower ring.

[0015] The driving unit is a crank slider mechanism.

[0016] The beneficial effects of the present invention are:

[0017] The production line of the present invention includes a lower end cover loading device, a bracket loading device, a paper tube loading device, a bracket opening device, a sleeve loading device and an upper end cover loading device which are sequentially arranged along the conveying direction of the conveyor belt. A positioning groove which matches the outer dimensions of the lower end cover is provided on the tray for accommodating the lower end cover and limiting the lower end cover. The tray passes through each device in sequence with the aid of the conveyor belt. The bracket loading device inserts the diffuser bracket into the annular groove of the lower end cover, the paper tube loading device sleeves the paper tube on the diffuser bracket, the bracket opening device opens the spring piece, the sleeve loading device inserts the cylindrical sleeve into the paper tube, and finally the upper end cover loading device covers the upper end cover on the paper tube, thereby completing the efficient and automatic assembly of the filter paper tube and the skeleton of the filter, effectively reducing manual labor.

[0018] An annular plug-in groove is provided on the lower end cover, and the upper and lower ends of the bracket body are respectively extended outward by spring pieces. The bracket body is arranged at intervals along the circumferential direction of the plug-in groove. When the lower end of the bracket body is inserted into the plug-in groove, the lower end of the bracket body is clamped and fixed by the inner wall of the plug-in groove.

[0019] The upper end of the bracket body is inserted into the slot of the annular base, and the sandwich block cooperates with the annular base to clamp and fix the upper end of the bracket body. After the bracket body is inserted into the plug-in slot, the first telescopic rod drives the sandwich block to rise relative to the annular base. The top of the slot forms a vertical limit for the bracket body to prevent the bracket body from moving upward during the rising process of the sandwich block. When the sandwich block is separated from the bracket body, the annular base rises and can be separated from the bracket body.

[0020] The lifting rod is driven to rise by the crank slider mechanism, and the upper raised inclined surface contacts the bottom edge of the upper slide groove to form a driving cooperation, and the lower raised inclined surface contacts the bottom edge of the lower slide groove to form a driving cooperation. In the top view, the first lever moves counterclockwise with the upper ring and the second lever moves clockwise with the lower ring. The paired first lever and second lever are staggered and located on different radial lines of the upper ring. The first lever and the second lever are opened and squeeze the spring plates on the left and right sides of the bracket body respectively. The spring plates are squeezed and bent, that is, the spring plates on the left and right sides of the bracket body are opened, and the opening angle of the spring plates increases. The spring plates support and squeeze the paper storage structure of the paper tube, so that the paper storage structure at the trough of the paper tube forms a closed structure with a certain strength.

[0021] When the diffuser bracket is inserted into the lower end cover, the spring piece is closed, and the closed spring piece occupies a small size in the circumferential direction, which facilitates the paper storage structure of the paper tube to smoothly enter between the two diffuser brackets from top to bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 This is a schematic structural diagram of the bracket loading device of Example 1;

[0024] Figure 3 This is a bottom view of the bracket loading device of Example 1;

[0025] Figure 4 for Figure 3 AA section view;

[0026] Figure 5 Schematic diagram of the state in which the sandwich block in the bracket loading device rises relative to the annular base;

[0027] Figure 6 This is a structural diagram of the paper tube feeding device;

[0028] Figure 7This is a schematic diagram of the initial state of the paper tube feeding device;

[0029] Figure 8 is a schematic structural diagram of a stent expansion device;

[0030] Figure 9 A schematic diagram of the first lever and the second lever of the bracket opening device in the open state;

[0031] Figure 10 A bottom view of the stent opening device in an open state;

[0032] Figure 11 for Figure 10 BB cross-sectional view;

[0033] Figure 12 Schematic diagram of the structure of the upper clamping ring;

[0034] Figure 13 is a structural diagram of the upper ring;

[0035] Figure 14 Schematic diagram of the structure of the assembled filter element;

[0036] Figure 15 for Figure 14 A magnified schematic diagram of the local C in the middle;

[0037] Figure 16 This is a schematic diagram of the assembly of the paper tube and the diffuser bracket;

[0038] Figure 17 for Figure 16 A magnified schematic diagram of the local D in the middle;

[0039] Figure 18 It is a structural diagram of the diffuser bracket;

[0040] Figure 19 Schematic diagram of the spring clip of the diffuser bracket in the closed state;

[0041] In the accompanying drawings, 1. lower end cover feeding device, 2. bracket feeding device, 201. first mounting seat, 202. annular base, 203. sandwich block, 204. slot, 205. first telescopic rod, 3. paper tube feeding device, 301. second mounting seat, 302. parallel clamping jaws, 303. guide shaft, 304. clamping end, 305. second telescopic rod, 4. bracket opening device, 401. fourth mounting seat, 402. lifting rod, 403. upper ring, 404. lower ring, 405. upper slide, 406. first lever, 4 07. Lower sliding groove, 408. Second shift rod, 409. Upper protrusion, 4010. Lower protrusion, 4011. Return spring, 4013. Sleeve, 4015. Upper retaining ring, 4016. Lower retaining ring, 4017. Crank slider mechanism, 5. Upper end cover feeding device, 6. Conveyor belt, 7. Tray, 9. Paper tube, 901. Paper storage structure, 10. Sleeve feeding device, 11. Upper end cover, 12. Cylindrical sleeve, 13. Lower end cover, 1301. Plug-in slot, 14. Diffuser bracket, 1401. Bracket body, 1402. Shrapnel. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0043] Example 1, as Figure 1 As shown, this embodiment relates to a filter paper tube skeleton assembly production line comprising a lower end cover loading device 1, a bracket loading device 2, a paper tube loading device 3, a bracket opening device 4, a sleeve loading device 10 and an upper end cover loading device 5 which are sequentially arranged along the conveying direction of a conveyor belt 6; Figure 14 As shown, the skeleton includes an upper end cover 11, a cylindrical sleeve 12, a lower end cover 13 and a diffuser bracket 14. Figure 18 、 Figure 19 As shown, the diffuser bracket 14 includes a bracket body 1401 and spring pieces 1402 arranged on the left and right sides of the bracket body 1401 , and the spring pieces 1402 have the freedom to open and close.

[0044] The conveyor belt 6 is a commercially available roller-type angle conveyor belt.

[0045] A tray 7 is provided on the conveyor belt 6, and guide strips for guiding the tray 7 are provided on both sides of the conveyor belt 6. A positioning groove is provided on the tray 7 in accordance with the outer dimensions of the lower end cover 13. The bracket loading device 2 is used to load the diffuser bracket 14 closed by the spring 1402; Figure 14 、 Figure 15As shown, the lower end cover 13 is provided with a slot 1301 for the bracket body 1401. The bracket opening device 4 is used to open the spring 1402. The lower end cover loading device 1, the bracket loading device 2, the paper tube loading device 3, the bracket opening device 4, the sleeve loading device 10, and the upper end cover loading device 5 are each equipped with a slide module and connected to the slider of the slide module. The slider has the freedom of movement along the X-axis, Y-axis, and Z-axis in the slide module. The slide module is installed above the conveyor belt 6 via a gantry.

[0046] The difference between the filter element in this embodiment and the filter element in the prior art with publication number CN120042675A is that the paper tube 9, upper end cover 11, cylindrical sleeve 12, lower end cover 13 and diffuser bracket 14 are all split structures and plug-fit together, and there is no welding between the upper end cover 11, cylindrical sleeve 12, lower end cover 13 and diffuser bracket 14.

[0047] During operation, the lower end cover 13 is placed into the positioning groove of the tray 7 by the lower end cover loading device 1, and then the conveyor belt 6 transports the tray 7 and passes through the bracket loading device 2, the paper tube loading device 3, the bracket opening device 4, the sleeve loading device 10 and the upper end cover loading device 5 in sequence, and the bracket loading device 2 inserts the diffuser bracket 14 into the annular groove of the lower end cover 13, the paper tube loading device 3 puts the paper tube 9 on the diffuser bracket 14, the bracket opening device 4 opens the spring piece 1402, and the sleeve loading device 10 inserts the cylindrical sleeve 12 into the paper tube 9, and finally the upper end cover loading device 5 covers the upper end cover 11 on the paper tube 9, completing the assembly of the filter paper tube 9 and the skeleton of the filter to form a filter element of the filter, and finally the assembled filter element is removed from the tray 7 manually, and the tray 7 is placed on the conveyor belt 6 for repeated assembly of the filter element, which improves the automation degree and work efficiency of the assembly operation and effectively reduces manpower labor.

[0048] The plug-in slot 1301 is an annular slot, and the upper and lower ends of the bracket body 1401 are respectively extended outward by the spring pieces 1402. The bracket body 1401 is arranged at intervals along the circumferential direction of the plug-in slot 1301. When the lower end of the bracket body 1401 is inserted into the plug-in slot 1301, the lower end of the bracket body 1401 is clamped and fixed by the inner wall of the plug-in slot 1301.

[0049] like Figure 19 As shown, the closed spring piece 1402 occupies a small size in the circumferential direction, which facilitates the paper storage structure 901 of the paper tube 9 to smoothly enter between the two diffuser supports 14 from top to bottom.

[0050] The tray 7 is a rectangular plate, and the guide strips on both sides of the conveyor belt 6 guide the rectangular plate to ensure the position accuracy of the lower end cover 13 when passing through each feeding device, so that the relative position between the paper tube 9 and the frame is accurate, thereby improving the assembly success rate.

[0051] Preferably, the lower end cover loading device 1 includes a first clamp, the sleeve loading device 10 includes a third clamp, and the upper end cover loading device 5 is a fourth clamp. The first clamp, the third clamp, and the fourth clamp are all electric clamps, and each clamp is connected to the slider on its respective matching slide module.

[0052] like Figure 2-Figure 4 As shown, the stent loading device 2 includes a first mounting seat 201, an annular base 202, and a core block 203. The annular base 202 is fixedly connected to the first mounting seat 201. A slot 204 is provided on the inner wall of the annular base 202, which is compatible with the stent body 1401. The core block 203 is coaxially arranged within the inner cavity of the annular base 202 and is compatible with the stent body 1401. The core block 203 is connected to the first mounting seat 201 via a first telescopic rod 205 and has the freedom to rise and fall relative to the annular base 202. The first mounting seat 201 is connected to a slider. The slots 204 are arranged in an annular array along the annular base 202.

[0053] When the bracket loading device 2 is working, the upper end of the bracket body 1401 is inserted into the slot 204 of the annular base 202, and the sandwich block 203 cooperates with the annular base 202 to clamp and fix the upper end of the bracket body 1401, and with the help of the slider moving on the slide module, it moves to the top of the tray 7 with the lower end cover 13, and the slider moves downward along the Z axis, so that the lower end of the bracket body 1401 is inserted into the plug-in slot 1301; Figure 5 As shown, the first telescopic rod 205 is shortened, causing the sandwich block 203 to rise relative to the annular base 202, and the top of the slot 204 forms a vertical limit for the bracket body 1401, preventing the bracket body 1401 from moving upward during the rising process of the sandwich block 203. When the sandwich block 203 is separated from the bracket body 1401, the first telescopic rod 205 stops shortening, and the slider drives the first mounting seat 201, the annular base 202 and the sandwich block 203 to move upward synchronously, so that the annular base 202 is separated from the bracket body 1401, completing the assembly of the diffuser bracket 14 and the lower end cover 13. The annular base 202 moves with the slider to the top of the next set of diffuser brackets 14 to be assembled and moves downward, inserting the upper end of the bracket body 1401 of the diffuser bracket 14 into the insertion slot 1301. The sandwich block 203, driven by the first telescopic rod 205, moves downward, cooperating with the annular base 202 to clamp the diffuser bracket 14. The slider moves upward, and the annular base 202 and sandwich block 203 lift the diffuser bracket 14 group for assembly with the next lower end cap 13. This operation method can complete the installation of all diffuser brackets 14 in the framework in a single movement, effectively improving work efficiency.

[0054] like Figure 6As shown, the paper tube feeding device 3 includes a second mounting seat 301, a parallel clamping jaw 302 and a guide shaft 303. The second mounting seat 301 is connected to the slider on the slide module, the parallel clamping jaw 302 is vertically arranged to the guide shaft 303, and the parallel clamping jaw 302 is horizontally arranged on the second mounting seat 301. The clamping end 304 of the parallel clamping jaw 302 is arranged in an arc shape. The guide shaft 303 is connected to the second mounting seat 301 by means of a second telescopic rod 305 and has the freedom to rise and fall relative to the parallel clamping jaw 302. The axis of the guide shaft 303 passes through the midpoint of the line connecting the centers of the two clamping ends 304.

[0055] During operation, the slider drives the first mounting seat 301 to move horizontally, so that the paper tube 9 enters the two open clamping ends 304 of the parallel clamping jaws 302; then the first telescopic rod 305 extends, so that the guide shaft 303 is inserted into the inner hole of the paper tube 9. The lower end of the guide shaft 303 is tapered to facilitate insertion into the paper tube 9. Then the clamping ends 304 move toward each other, and combined with the support of the guide shaft 303, the paper tube 9 is formed into an embracing clamp.

[0056] The slider drives the first mounting seat 301 to move to the top of the lower end cover 13 with the diffuser bracket 14. The guide shaft 303 is coaxially arranged with the lower end cover 13. The slider descends, and the lower end of the guide shaft 303 is inserted between the diffuser brackets 14. The diffuser bracket 14 is inserted into the crest of the paper tube 9. Then the clamping ends 304 move in the opposite direction and separate from the paper tube 9. The paper tube feeding device returns to its initial state. Figure 7 The slider drives the first mounting seat 301 to rise so that the guide shaft 303 is separated from the paper tube 9, completing the assembly of the paper tube 9.

[0057] The claws of the sleeve loading device 10 are inserted into the interior of the cylindrical sleeve 12, and then the claws move in the opposite direction to grab the cylindrical sleeve 12 in a supporting manner. The sleeve loading device 10 inserts the cylindrical sleeve 12 into the paper tube 9 as the slider moves, and then the claws move toward each other and separate from the paper tube 9 as the slider moves upward.

[0058] A manual operation position is also provided on the work station where the paper tube feeding device 3 is located. If the paper tube 9 is thin or has low hardness and is easily deformed, the paper tube feeding device 3 and the slide module where it is located can be stopped, and the paper tube 9 can be manually mounted on the diffuser bracket 14 of the lower end cover 13.

[0059] like Figure 8 As shown, the bracket opening device 4 includes a lifting rod 402, an upper ring 403 and a lower ring 404 arranged on the fourth mounting seat 401. The upper ring 403 and the lower ring 404 are coaxially arranged and rotatably connected to the fourth mounting seat 401; Figure 10 、 Figure 11As shown, the upper ring 403 is provided with an upper groove 405 and a first lever 406, and the lower ring 404 is provided with a lower groove 407 and a second lever 408. The first lever 406 and the second lever 408 are arranged in pairs along the radial direction of the upper ring 403, and the first lever 406 and the second lever 408 are inserted into the two spring pieces 1402 of each bracket body 1401. The paired first lever 406 and the second lever 408 have a small size in the circumferential direction, which facilitates insertion into the two closed spring pieces 1402 of the diffuser bracket 14. The first lever 406 and the second lever 408 can be rotated in opposite directions to push the spring pieces 1402 to open them.

[0060] The structure of the upper ring 403 is as follows Figure 13 shown.

[0061] The lifting rod 402 is provided with an upper protrusion 409 matched with the upper slide groove 405 and a lower protrusion 4010 matched with the lower slide groove 407. The lifting rod 402 has the freedom to move along its own axis on the fourth mounting seat 401 by means of the crank slider mechanism 4017. The lifting rod 402 moves and drives the upper ring 403 and the lower ring 404 to rotate in the opposite direction by means of the upper protrusion 409 and the lower protrusion 4010. Figure 9 As shown; a return spring 4011 is respectively provided between the fourth mounting seat 401 and the upper ring 403 and the lower ring 404. When the lifting rod 402 rises, the upper ring 403 and the lower ring 404 rotate, and the return spring 4011 is stretched. When the lifting rod 402 is reset, the upper ring 403 and the lower ring 404 are reset under the action of the return spring 4011.

[0062] Upper protrusion 409 and lower protrusion 4010 are trapezoidal and symmetrically arranged along the axis of upper ring 403. Upper groove 405 is disposed within the cavity of upper ring 403, while lower groove 405 is disposed within the cavity of lower ring 404. Lifting rod 402 is coaxially disposed with upper ring 403. The inclined surface of upper protrusion 409 contacts the bottom edge of upper groove 405 to form a driving engagement, while the inclined surface of lower protrusion 4010 contacts the bottom edge of lower groove 407 to form a driving engagement. The inclined surface of upper protrusion 409 is disposed on its right side, while the inclined surface of lower protrusion 4010 is disposed on its left side.

[0063] A sleeve 4013 is provided on the fourth mounting seat 401. The upper end of the sleeve 4013 is provided with a flange that overlaps the fourth mounting seat 401 and is connected to the fourth mounting seat 401 via bolts. The lower end of the sleeve 4013 passes through the fourth mounting seat 401 and extends downward. An upper snap ring 4015 and a lower snap ring 4016 are provided on the sleeve 4013 along its axial direction. The upper and lower rings 403 and 404 are both fitted together with the sleeve 4013. The fourth mounting seat 401 cooperates with the upper snap ring 4015 to axially limit the upper ring 403, while the upper snap ring 4015 cooperates with the lower snap ring 4016 to axially limit the lower ring 404. The sleeve 4013 is provided with notches for the movement of the upper and lower protrusions 409 and 4010.

[0064] The lower end of the upper circular ring 403 and the side wall of the upper snap ring 4015 are connected to both ends of the return spring 4011 , and the upper end of the lower circular ring 404 and the side wall of the lower snap ring 4016 are connected to both ends of the return spring 4011 .

[0065] like Figure 12 As shown, the upper and lower snap rings 4015 and 4016 have identical structures, both being split components, comprising a left ring and a right ring. The ends of the left and right rings overlap to form a complete circular ring. Bolts pass through the overlapping ends of the left and right rings to secure them, clamping the upper and lower snap rings 4015 and 4016 to the sleeve 4013. Each of the upper and lower snap rings 4015 and 4016 has notches for the movement of the upper and lower protrusions 409 and 4010, respectively. Limiting ridges are provided on the inner walls of the upper and lower snap rings 4015 and 4016, and the sleeve 4013 is provided with two sets of limiting grooves that match the limiting ridges. The limiting ridges and grooves prevent the upper and lower snap rings 4015 and 4016 from moving up and down.

[0066] During operation, the lifting rod 402 is driven upward by the crank slider mechanism 4017, the inclined surface of the upper protrusion 409 contacts the bottom edge of the upper slide groove 405 to form a driving cooperation, and the inclined surface of the lower protrusion 4010 contacts the bottom edge of the lower slide groove 407 to form a driving cooperation. In the top view, the first lever 406 moves counterclockwise with the upper ring 403, and the second lever 408 moves clockwise with the lower ring 404. The paired first lever 406 and second lever 408 are misaligned and located at On different radial lines of the upper ring 403, the first lever 406 and the second lever 408 are opened and squeeze the spring pieces 1402 on the left and right sides of the bracket body 1401 respectively. The spring pieces 1402 are squeezed and bent, that is, the spring pieces 1402 on the left and right sides of the bracket body 1401 are opened, and the opening angle of the spring pieces 1402 is increased. The spring pieces 1402 support and squeeze the paper storage structure 901 of the paper tube 9, so that the paper storage structure 901 at the trough of the paper tube 9 forms a closed structure with a certain strength.

[0067] The upper end cover 11 is clamped by the upper end cover feeding device 5, and the upper end cover feeding device 5 assembles the upper end cover 11 on the paper tube 9 as the slider moves, completing the assembly of the paper tube 9 and the frame of the filter element, as shown in FIG. Figure 14-17 shown.

[0068] Example 2 differs from Example 1 only in that the bracket loading device 2 is a second clamp, and the second clamp is an electric clamp. The bracket loading device 2 clamps a single diffuser bracket 14 at a time and inserts the diffuser bracket 14 into the plug-in slot 1301 on the lower end cover 13 in a circular array direction. The structure of the bracket loading device 2 is simpler.

Claims

1. A filter paper cylinder skeleton assembly production line, wherein the skeleton comprises an upper end cover (11), a cylindrical sleeve (12), a lower end cover (13), and a diffuser bracket (14), wherein the diffuser bracket (14) comprises a bracket body (1401) and springs (1402) disposed on the left and right sides of the bracket body (1401), wherein the springs (1402) have the freedom to open and close, and wherein: The production line comprises a lower end cover loading device (1), a bracket loading device (2), a paper tube loading device (3), a bracket opening device (4), a sleeve loading device (10) and an upper end cover loading device (5) which are sequentially arranged along the conveying direction of the conveyor belt (6), a tray (7) is arranged on the conveyor belt (6), guide strips of the tray (7) are arranged on both sides of the conveyor belt (6), a positioning groove is arranged on the tray (7) in accordance with the outer dimensions of the lower end cover (13), the bracket loading device (2 ) is used to load the diffuser bracket (14) closed by the spring piece (1402), the lower end cover (13) is provided with a socket (1301) of the bracket body (1401), the bracket opening device (4) is used to open the spring piece (1402), the lower end cover loading device (1), the bracket loading device (2), the paper tube loading device (3), the bracket opening device (4), the sleeve loading device (10) and the upper end cover loading device (5) are respectively provided with a slide module and connected to the slider of the slide module.

2. The filter paper cylinder frame assembly production line according to claim 1, characterized in that: The lower end cover feeding device (1) includes a first clamping jaw, the sleeve feeding device (10) includes a third clamping jaw, and the upper end cover feeding device (5) includes a fourth clamping jaw.

3. The filter paper cylinder frame assembly production line according to claim 1, characterized in that: The bracket loading device (2) is a second clamping claw.

4. The filter paper cylinder frame assembly production line according to claim 1, characterized in that: The bracket loading device (2) includes a first mounting seat (201), an annular base (202) and a sandwich block (203). The annular base (202) is fixedly connected to the first mounting seat (201). A slot (204) matching the bracket body (1401) is provided on the inner wall of the annular base (202). The sandwich block (203) is coaxially arranged with the inner cavity of the annular base (202) and matches the bracket body (1401). The sandwich block (203) is connected to the first mounting seat (201) by means of a first telescopic rod (205) and has the freedom to rise and fall relative to the annular base (202).

5. The filter paper cylinder frame assembly production line according to claim 1, characterized in that: The paper tube feeding device (3) comprises a second mounting seat (301), a parallel clamping jaw (302) and a guide shaft (303), wherein the parallel clamping jaw (302) and the guide shaft (303) are arranged vertically, and the parallel clamping jaw (302) is arranged horizontally on the second mounting seat (301), and the clamping end (304) of the parallel clamping jaw (302) is arranged in an arc shape. The guide shaft (303) is connected to the second mounting seat (301) by means of a second telescopic rod (305) and has the freedom to rise and fall relative to the parallel clamping jaw (302), and the axis of the guide shaft (303) passes through the midpoint of the line connecting the centers of the two clamping ends (304).

6. The filter paper cylinder frame assembly production line according to claim 1, characterized in that: The bracket opening device (4) includes a lifting rod (402), an upper ring (403) and a lower ring (404) arranged on the fourth mounting seat (401), the upper ring (403) and the lower ring (404) are coaxially arranged and rotatably connected to the fourth mounting seat (401), the upper ring (403) is provided with an upper slide groove (405) and a first shifting rod (406), the lower ring (404) is provided with a lower slide groove (407) and a second shifting rod (408), the first shifting rod (406) and the second shifting rod (408) are arranged in pairs along the radial direction of the upper ring (403), and the first shifting rod (406) and the second shifting rod (408) are inserted into the main shaft of each bracket. In the two spring pieces (1402) of the body (1401), the lifting rod (402) is respectively provided with an upper protrusion (409) matched with the upper slide groove (405) and a lower protrusion (4010) matched with the lower slide groove (407). The lifting rod (402) has the freedom to move along its own axis on the fourth mounting seat (401) with the help of the driving unit. The lifting rod (402) moves and drives the upper ring (403) and the lower ring (404) to rotate in the opposite direction with the help of the upper protrusion (409) and the lower protrusion (4010). Reset springs (4011) are respectively provided between the fourth mounting seat (401) and the upper ring (403) and the lower ring (404).

7. The filter paper cylinder frame assembly production line according to claim 6, characterized in that: The upper protrusion (409) and the lower protrusion (4010) are trapezoidal and symmetrically arranged along the axis of the upper ring (403). The inclined surface of the upper protrusion (409) contacts the bottom edge of the upper slide groove (405) to form a driving fit, and the inclined surface of the lower protrusion (4010) contacts the bottom edge of the lower slide groove (407) to form a driving fit.

8. The filter paper cylinder frame assembly production line according to claim 6, characterized in that: The fourth mounting seat (401) is provided with a sleeve (4013), and the upper end of the sleeve (4013) is provided with a convex edge, and the convex edge is overlapped on the fourth mounting seat (401) and connected to the fourth mounting seat (401) by means of bolts. The lower end of the sleeve (4013) passes through the fourth mounting seat (401) and is cantilevered downward. The sleeve (4013) is provided with an upper retaining ring (4015) and a lower retaining ring (4016) in sequence along its axial direction. The upper ring (403) and the lower ring (404) are both set with the sleeve (4013). The fourth mounting seat (401) cooperates with the upper retaining ring (4015) to form an axial limit of the upper ring (403), and the upper retaining ring (4015) cooperates with the lower retaining ring (4016) to form an axial limit of the lower ring (404).

9. The filter paper cylinder frame assembly production line according to claim 6, characterized in that: The driving unit is a crank slider mechanism (4017).

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