Filter and Filter Assembly Method

Abstract

The present invention discloses a filter and a filter assembly method. The filter includes a cavity and a cover plate covering the cavity. The cover plate is provided with mounting holes, and a connector mounting seat is installed at the mounting holes. The connector mounting seat can be adjusted horizontally relative to the mounting holes. A connection hole that penetrates up and down is formed in the middle of the connector mounting seat for threadedly mounting a connector. A plurality of threaded holes are provided around the mounting holes on the cover plate, and a plurality of fixing screws are respectively threadedly connected to the threaded holes. The fixing screw includes a screw rod portion connected to the threaded hole and a nut portion, and the nut portion is used for pressing against the connector mounting seat. The filter assembly method also provides an alignment jig. The positioning posts of the alignment jig are used to accurately position the connector mounting seat, and then the fixing screws are tightened to fix the connector mounting seat on the cover plate. Using the present invention can improve the accuracy of the position of the connector mounting seat.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and particularly to a filter and a filter assembly method. Background Art

[0002] The filter structure generally includes a cavity and a cover plate. A connector mounting seat is provided on the cover plate for mounting a connector. Specifically, the cover plate is assembled on the cavity by screws, the connector mounting seat is riveted on the cover plate, and the connector is installed in the threaded hole of the connector mounting seat. In the existing filter structure, there is a problem of poor positional accuracy of the connector mounting seat. The reasons are as follows: (1) There are tolerances in the hole positions of the cover plate and the connector mounting seat during processing, resulting in a positional deviation when the connector mounting seat is riveted on the cover plate. (2) There are also tolerances in the hole positions for installing the screws on the cavity and the cover plate, resulting in a new positional deviation when the cover plate is assembled on the cavity. In summary, the cumulative deviation causes the problem of poor positional accuracy of the connector mounting seat, thereby affecting the installation of the connector.

[0003] Therefore, a filter and a filter assembly method capable of solving the above problems are needed. Summary of the Invention

[0004] The purpose of the present invention is to provide a filter that can improve the accuracy of the positional accuracy of the connector mounting seat.

[0005] Another purpose of the present invention is to provide a filter assembly method that can improve the accuracy of the positional accuracy of the connector mounting seat.

[0006] To achieve the above purposes, the present invention discloses a filter, which includes a cavity and a cover plate covering the cavity.

[0007] The cover plate is provided with mounting holes, and a connector mounting seat is installed at the mounting holes. The connector mounting seat can be adjusted horizontally relative to the mounting holes. A connection hole that penetrates up and down is formed in the middle of the connector mounting seat for threadedly installing a connector.

[0008] The cover plate is provided with a plurality of threaded holes around the mounting holes. The plurality of threaded holes are respectively threadedly connected with fixing screws. The fixing screws include a screw rod portion connected to the threaded holes and a nut portion. The nut portion is used to press against the connector mounting seat. When the nut portion is not pressed tightly against the connector mounting seat, the connector mounting seat can move horizontally.

[0009] Compared with the prior art, the present invention fixes the connector mounting base through the cooperation of a plurality of threaded holes and a plurality of fixing screws, and the connector mounting base is configured to be able to perform position adjustment in the horizontal direction relative to the mounting hole when the fixing screws are not fully tightened, thereby facilitating the precise installation of the connector mounting base by adjusting its position, which is conducive to solving the problem of low accuracy of the connector mounting base caused by tolerance factors.

[0010] Preferably, the connector mounting base includes a base portion and a plugging portion extending downward from the middle of the base portion. The plugging portion is inserted into the mounting hole, and the base portion is pressed against the cover plate; an edge portion is formed at the outer bottom of the base portion, and at least part of the fixing screws are pressed against the edge portion.

[0011] Preferably, the connector mounting base includes a base portion and a plugging portion extending downward from the middle of the base portion. The plugging portion is inserted into the mounting hole, and the base portion is pressed against the cover plate; at least one lug portion pressed against the cover plate is formed on the outer side of the base portion. An adjustment through hole cooperating with the fixing screw is formed in the lug portion. After the fixing screw passes through the adjustment through hole, it is threadedly connected to the threaded hole, and the fixing screw can move horizontally relative to the adjustment through hole.

[0012] Preferably, an edge portion is formed at the outer bottom of the base portion, and at least part of the fixing screws are pressed against the edge portion.

[0013] Preferably, a groove is formed on the upper surface of the cover plate. The edge portion is arranged in the groove and can move horizontally relative to the groove. The edge portion and the upper surface of the cover plate are located on the same horizontal plane.

[0014] Preferably, the connector mounting base includes a seat body and a positioning member riveted together. The cross-section of the seat body is generally T-shaped, including a wide portion on the upper side and a narrow portion on the lower side. The connection hole is formed in the middle of the seat body. The positioning member includes a sleeve portion sleeved on the narrow portion and a plate portion attached to the bottom surface of the wide portion. The outer side of the plate portion extends beyond the wide portion, and the portion of the plate portion extending beyond the wide portion forms the edge portion.

[0015] Preferably, a flared opening is formed at the top of the connection hole.

[0016] To achieve the above-mentioned another object, the present invention also discloses an assembly method for assembling the above-mentioned filter. The method includes:

[0017] Provide an alignment jig, the alignment jig includes a carrier body and a positioning structure, positioning posts and assembly holes provided on the carrier body. The alignment jig can be positioned above the filter through the positioning structure. There are positioning holes on the carrier body, and the positioning posts are movably positioned up and down in the positioning holes. The positioning posts include plugging column bodies with dimensions equivalent to those of the connection holes and smaller than the dimensions of the flared openings.

[0018] Install the cover plate on the cavity.

[0019] Place the connector mounting seat into the mounting hole of the cover plate.

[0020] Assemble a plurality of the fixing screws into the corresponding threaded holes, and keep the plurality of fixing screws in an untightened state.

[0021] Position the alignment jig above the cover plate so that the positioning posts correspond to the flared openings of the connector mounting seat, and the assembly holes correspond to the threaded holes.

[0022] Move the positioning posts downward so that the plugging column bodies are inserted into the connection holes through the flared openings.

[0023] Tighten the plurality of fixing screws at the assembly holes.

[0024] Compared with the prior art, after the cover plate is assembled to the cavity in the present invention, the connector mounting seat is accurately positioned by the positioning posts of the alignment jig, so that the positional accuracy of the connector mounting seat will not be affected by the positional deviation generated when the cover plate is assembled to the cavity. After the positioning posts accurately position the connector mounting seat on the cover plate, then tighten the fixing screws to fix the connector mounting seat on the cover plate, so that the accuracy of the positional accuracy of the connector mounting seat can be effectively improved.

[0025] Preferably, the positioning post includes a main body portion, the plugging column body extends downward from the middle of the bottom end of the main body portion, and a conical structure adapted to the flared opening is formed at the top of the plugging column body; when the plugging column body is completely inserted into the connection hole, the conical structure fits with the flared opening, and the main body portion is pressed against the connector mounting seat.

[0026] Preferably, the positioning post is positioned in the positioning hole through a bushing; a head is formed at the top of the positioning post, and the head presses against the top of the bushing.

[0027] Preferably, after the plugging column body is inserted into the connection hole and before the plurality of fixing screws are tightened, the method further includes: fixing the positioning post by using a fixture.

[0028] Preferably, a plurality of boxes for installing the fixture are provided on the carrier body. Brief Description of the Drawings

[0029] Figure 1 This is a schematic structural diagram of the filter according to an embodiment of the present invention.

[0030] Figure 2 is Figure 1 a schematic structural diagram of A in

[0031] Figure 3 is Figure 1 a schematic cross-sectional structure diagram of

[0032] Figure 4 This is a schematic structural diagram of the connector mounting base in an embodiment of the present invention.

[0033] Figure 5 is Figure 4 a schematic cross-sectional structure diagram of

[0034] Figure 6 This is a schematic structural diagram of the filter and the alignment jig in an embodiment of the present invention.

[0035] Figure 7 is Figure 6 a schematic exploded structure diagram of

[0036] Figure 8 This is a schematic cross-sectional structure diagram of the filter and the alignment jig in an embodiment of the present invention.

[0037] Figure 9 is Figure 8 a schematic exploded structure diagram of Detailed Description of the Embodiment

[0038] To describe in detail the technical content, structural features, achieved objectives and effects of the present invention, the following is a detailed description in conjunction with the embodiments and with reference to the drawings.

[0039] Please refer to Figures 1 to 4 , the present invention discloses a filter 100, which includes a cavity 1 and a cover plate 2 covering the cavity 1. The cover plate 2 is provided with a mounting hole 21, and a connector mounting base 3 is installed at the mounting hole 21. The connector mounting base 3 can be adjusted horizontally relative to the mounting hole 21. A connection hole 30 that penetrates up and down is formed in the middle of the connector mounting base 3 for threadedly mounting a connector (not shown in the figure). The cover plate 2 is provided with a plurality of threaded holes 22 around the mounting hole 21. A plurality of fixing screws 4 are respectively threadedly connected to the threaded holes 22. The fixing screw 4 includes a screw rod portion (not shown in the figure) connected to the threaded hole 22 and a nut portion 41. The nut portion 41 is used to press against the connector mounting base 3. When the nut portion 41 is not pressed tightly against the connector mounting base 3, the connector mounting base 3 can move horizontally.

[0040] Specifically, after the connector mounting base 3 is precisely fixed to the cover plate 2, the connector is installed in the connection hole 30, and the connector head of the connector can be precisely inserted into the vertical insertion slot of the transfer base (not shown in the figure) of the cavity 1.

[0041] Specifically, the number of connector mounting bases 3 of the filter 100 is usually multiple, and the cover plate 2 is correspondingly provided with structures such as an equal number of mounting holes 21.

[0042] In the present invention, the connector mounting base 3 is fixed by the cooperation of a plurality of threaded holes 22 and a plurality of fixing screws 4, and the connector mounting base 3 is configured to be able to perform position adjustment in the horizontal direction relative to the mounting hole 21 when the fixing screw 4 is not fully tightened, so as to facilitate the precise installation of the connector mounting base 3 by adjusting its position, which is beneficial to solving the problem of low accuracy of the connector mounting base 3 caused by tolerance factors.

[0043] Refer to Figure 2 and Figure 3 In some embodiments, the connector mounting base 3 includes a base portion 31 and a plug-in portion 32 extending downward from the middle of the base portion 31. The plug-in portion 32 is inserted into the mounting hole 21, the base portion 31 is crimped on the cover plate 2, and the plug-in portion 32 can move horizontally relative to the mounting hole 21 to facilitate the precise positioning of the connector mounting base 3; an edge portion 311 is formed at the outer bottom of the base portion 31, and at least part of the fixing screw 4 is crimped on the edge portion 311. The connector mounting base 3 is fixed by the nut portion 41 of the fixing screw 4 pressing on the edge portion 311, which is beneficial to maintaining the connector mounting base 3 at an accurate position after the position adjustment of the connector mounting base 3 is completed.

[0044] Specifically, since resonators are assembled around the mounting hole 21 and screws for fixing the cover plate 2 to the cavity 1, the position of the threaded hole 22 connected to the fixing screw 4 needs to be set according to the specific structures of the cavity 1 and the cover plate 2 of the filter 100. In the present invention, the connector mounting base 3 is fixed by the cooperation of three fixing screws 4 and three threaded holes 22, and the three threaded holes 22 are arranged at intervals around the mounting hole 21. Of course, the number of threaded holes 22 is not limited to this, and the cover plate 2 can also be provided with a plurality of threaded holes 22 to maintain the accurate position of the connector mounting base 3.

[0045] Refer to Figures 2 to 4, in some embodiments, the connector mounting base 3 includes a base 31 and a plugging portion 32 extending downward from the middle of the base 31. The plugging portion 32 is inserted into the mounting hole 21, and the base 31 is crimped onto the cover plate 2; at least one lug portion 312 that is crimped onto the cover plate 2 is formed on the outer side of the base 31. An adjustment through hole 3121 that cooperates with the fixing screw 4 is formed in the lug portion 312. After the fixing screw 4 passes through the adjustment through hole 3121, it is threadedly connected to the threaded hole 22. The fixing screw 4 can move horizontally relative to the adjustment through hole 3121 to facilitate the position adjustment of the connector mounting base 3.

[0046] Specifically, the shape of the adjustment through hole 3121 is configured as a waist shape, so that when the nut portion 41 of the fixing screw 4 does not crimp and fix the lug portion 312, the connector mounting base 3 can move reliably in the horizontal direction. More specifically, only one lug portion 312 is provided on the base 31, which can flexibly adapt to the complex structure of the cover plate 2, so that the connector mounting base 3 has better applicability.

[0047] More specifically, an edge portion 311 is formed at the outer bottom of the base 31. At least part of the fixing screw 4 is crimped on the edge portion 311, and the lug portion 312 is formed on the outer side of the edge portion 311. In this embodiment, the connector mounting base 3 is fixed to the cover plate 2 by three fixing screws 4. Two of the fixing screws 4 are directly threadedly connected to the threaded hole 22, and their nut portions 41 are crimped on the edge portion 311. The other fixing screw 4 passes through the adjustment through hole 3121 and is then threadedly connected to the threaded hole 22. After accurately positioning the connector mounting base 3, the three fixing screws 4 are tightened, so that the accuracy of the position of the connector mounting base 3 can be effectively improved.

[0048] Reference Figures 2 to 4 , a groove 23 is formed on the upper surface of the cover plate 2. The edge portion 311 is disposed in the groove 23 and can move horizontally relative to the groove 23 to facilitate the adjustment of the position of the connector mounting base 3; the edge portion 311 and the upper surface of the cover plate 2 are located on the same horizontal plane, so that after the fixing screw 4 is assembled into the threaded hole 22, the nut portion 41 of the fixing screw 4 can be more firmly crimped on the edge portion 311 of the connector mounting base 3 to improve the stability of the connector mounting base 3 on the cover plate 2.

[0049] Reference Figure 5 , the connector mounting base 3 includes a seat body 33 and a positioning member 34 riveted together. The cross-section of the seat body 33 is generally T-shaped, including a wide portion 331 on the upper side and a narrow portion 332 on the lower side. The connection hole 30 is formed in the middle of the seat body 33. The positioning member 34 includes a sleeve portion 341 sleeved on the narrow portion 332 and a plate portion 342 attached to the bottom surface of the wide portion 331. The outer side of the plate portion 342 extends beyond the wide portion 331, and the part of the plate portion 342 that extends beyond the wide portion 331 forms the edge portion 311.

[0050] More specifically, referring to Figure 4 and Figure 5 , a flared opening 301 is formed at the top of the connection hole 30, which facilitates the positioning of the connector mounting base 3 by using the positioning post of the alignment jig. Specifically, the positioning post can be fixed at an accurate position. At this time, if the position of the connector mounting base 3 deviates, the positioning post will be biased to one side relative to the connection hole 30. Due to the existence of the flared opening 301, it can guide the positioning post to insert into the connection hole 30. At the same time, since the horizontal position of the positioning post is fixed while the connector mounting base 3 can move horizontally, during the insertion process of the positioning post, the connector mounting base 3 will generate horizontal movement under the action of the positioning post, thereby achieving the purpose of position correction.

[0051] Please refer to Figures 6 to 9 , the present invention provides an alignment jig 200 for assembling the above-mentioned filter 100. The alignment jig 200 includes a carrier 5 and a positioning structure 51, positioning posts 52, and assembly holes 53 provided on the carrier 5. The alignment jig 200 can be positioned above the filter 100 through the positioning structure 51. A positioning hole 50 is provided on the carrier 5, and the positioning posts 52 are vertically movably positioned in the positioning hole 50. The positioning posts 52 include insertion column bodies 521 with dimensions equivalent to those of the connection hole 30 and smaller than the dimensions of the flared opening 301. The positioning posts 52 are used to align the connector mounting base 3. The assembly holes 53 are provided corresponding to the positions of the threaded holes 22 and are used to tighten the fixing screws 4. Specifically, the number of the assembly holes 53 is not limited, and they can correspond one-to-one with the threaded holes 22, or not limited to this, as long as the purpose of tightening the fixing screws 4 through the assembly holes 53 can be achieved.

[0052] Specifically, in this embodiment, the carrier 5 is a fixing plate. A plurality of insertion holes 11 are provided in the cavity 1 of the filter 100, and the insertion holes 11 are respectively provided at the four diagonals and the opposite sides of the upper surface of the cavity 1. The positioning structure 51 is a plurality of positioning pins 51, and the positioning pins 51 are respectively provided on the lower surface of the carrier 5 corresponding to the positions of the insertion holes 11, and the positioning pins 51 are removably inserted into the insertion holes 11. When the insertion holes 11 are precisely machined, the tolerance of the insertion holes 11 needs to be maintained within an acceptable range so that the alignment jig 200 can be accurately positioned above the cover plate 2.

[0053] Refer to Figure 8 and Figure 9, the positioning post 52 includes a main body portion 522. The plug-in column body 521 extends downward from the middle of the bottom end of the main body portion 522. A conical structure 523 adapted to the flared opening 301 is formed at the top of the plug-in column body 521. When the plug-in column body 521 is completely inserted into the connection hole 30, the conical structure 523 fits with the flared opening 301, and the main body portion 522 is crimped on the connector mounting seat 3. By this technical means, it is beneficial for the positioning post 52 to perform reliable alignment on the connector mounting seat 3.

[0054] Specifically, the positioning post 52 is positioned in the positioning hole 50 through a bushing 54. A head 524 is formed at the top of the positioning post 52, and the head 524 crimps the top of the bushing 54. When performing precision machining on the positioning post 52, it is necessary to pre-install the bushing 54 on the carrier 5 and fully release the stress, and then perform precision machining so that the positioning post 52 has an accurate positional tolerance.

[0055] Refer to Figures 7 to 9 , a plurality of boxes 55 for installing jigs (not shown in the figure) are provided on the carrier 5, and the plurality of boxes 55 are respectively arranged at positions close to the head 524 of the positioning post 52. The jig is used to fix the positioning post 52 to prevent the positioning post 52 from loosening and causing inaccurate positioning of the connector mounting seat 3.

[0056] Specifically, in this embodiment, the alignment jig 200 is provided with a corresponding plurality of positioning posts 52 and a plurality of sets of assembly holes 53 corresponding to the plurality of connector mounting seats 3 and the plurality of sets of threaded holes 22.

[0057] Combined with Figures 1 to 9 , the present invention discloses an assembly method of a filter 100. The above alignment jig 200 is used to assemble the above filter 100. The assembly method includes:

[0058] (1) Install the cover plate 2 on the cavity 1;

[0059] (2) Place the connector mounting seat 3 into the mounting hole 21 of the cover plate 2;

[0060] (3) Assemble a plurality of fixing screws 4 into the corresponding threaded holes 22 so that the plurality of fixing screws 4 are in an untightened state;

[0061] (4) Position the alignment jig 200 above the cover plate 2 so that the positioning post 52 corresponds to the flared opening 301 of the connector mounting seat 3, and the assembly hole 53 corresponds to the threaded hole 22;

[0062] (5) Move the positioning post 52 downward so that the plug-in column body 521 is inserted into the connection hole 30 through the flared opening 301;

[0063] (6) Tighten the plurality of fixing screws 4 at the assembly hole 53.

[0064] Specifically, after the insertion post 521 is inserted into the connection hole 30 and before the plurality of fixing screws 4 are tightened, the assembly method further includes: using a fixture to fix the positioning post 52 to prevent the positioning post 52 from loosening before the fixing screws 4 are tightened.

[0065] In this embodiment, the specific process of assembling the filter 100 using the alignment jig 200 is as follows:

[0066] Fix the cover plate 2 on the cavity 1 using screws. Place the base 31 of the connector mounting seat 3 in the groove 23 of the cover plate 2, and insert the insertion portion 32 into the mounting hole 21. Pre-install three fixing screws 4 in the threaded holes 22 without fully tightening them. One of the fixing screws 4 passes through the adjustment through hole 3121, and the other two fixing screws 4 are directly installed, so that the connector mounting seat 3 can be adjusted in position in the horizontal direction. Insert the positioning pin 51 of the alignment jig 200 into the insertion hole 11 of the cavity 1 to accurately position the alignment jig 200 above the cover plate 2, so that the positioning post 52 can correspond to the bell mouth 301 of the connector mounting seat 3, and the assembly hole 53 corresponds to the threaded hole 22. Then, push the head 524 of the positioning post 52 to move the positioning post 52 downward, insert the insertion post body 521 completely into the connection hole 30, the conical structure 523 fits with the bell mouth 301, and the main body portion 522 is crimped on the connector mounting seat 3, so that the connector mounting seat 3 is accurately positioned on the cover plate 2. Clamp and fix the positioning post 52 using a fixture to prevent it from loosening. Pass the assembly tool through the assembly hole 53 to tighten the fixing screws 4, so that the connector mounting seat 3 is fixed on the cover plate 2. Remove the alignment jig 200, and then install the connector into the connection hole 30 of the connector mounting seat 3. Since the present invention effectively improves the accuracy of the position of the connector mounting seat 3, the position accuracy of the connector is also guaranteed.

[0067] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. An assembly method of a filter for assembling a filter, characterized in that, the filter includes a cavity and a cover plate covering the cavity, the cover plate is provided with mounting holes, a connector mounting seat is installed at the mounting holes, the connector mounting seat can be adjusted in position in the horizontal direction relative to the mounting holes, and a connection hole penetrating up and down is formed in the middle of the connector mounting seat for threadedly mounting a connector; the cover plate is provided with a plurality of threaded holes around the mounting holes, and the plurality of threaded holes are respectively threadedly connected with fixing screws. The fixing screws include a screw rod portion connected to the threaded holes and a nut portion. The nut portion is used for pressing against the connector mounting seat. When the nut portion is not pressed tightly against the connector mounting seat, the connector mounting seat can move in the horizontal direction; the method includes: providing an alignment jig, the alignment jig includes a positioning post and an assembly hole; installing the cover plate on the cavity; placing the connector mounting seat into the mounting hole of the cover plate; assembling the plurality of fixing screws into the corresponding threaded holes so that the plurality of fixing screws are in an untightened state; inserting the positioning post into the connection hole; tightening the plurality of fixing screws at the assembly hole.

2. The assembly method of the filter according to claim 1, characterized in that, the connector mounting seat includes a base portion and a plug-in portion extending downward from the middle of the base portion. The plug-in portion is inserted into the mounting hole, and the base portion is pressed against the cover plate; an edge portion is formed at the outer bottom of the base portion, and at least part of the fixing screws are pressed against the edge portion.

3. The assembly method of the filter according to claim 1, characterized in that, the connector mounting seat includes a base portion and a plug-in portion extending downward from the middle of the base portion. The plug-in portion is inserted into the mounting hole, and the base portion is pressed against the cover plate; at least one convex ear portion pressed against the cover plate is formed on the outer side of the base portion. An adjustment through hole cooperating with the fixing screw is formed in the convex ear portion. After the fixing screw passes through the adjustment through hole, it is threadedly connected to the threaded hole, and the fixing screw can move in the horizontal direction relative to the adjustment through hole.

4. The assembly method of the filter according to claim 3, characterized in that, an edge portion is formed at the outer bottom of the base portion, and at least part of the fixing screws are pressed against the edge portion.

5. The assembly method of the filter according to claim 2 or 4, characterized in that, a groove is formed on the upper surface of the cover plate, the edge portion is arranged in the groove and can move in the horizontal direction relative to the groove, and the edge portion and the upper surface of the cover plate are on the same horizontal plane.

6. The assembly method of the filter according to claim 2 or 4, characterized in that, The connector mounting seat includes a seat body and a positioning member riveted together. The cross-section of the seat body is generally T-shaped, including a wide part on the upper side and a narrow part on the lower side. The connecting hole is formed in the middle of the seat body. The positioning member includes a sleeve part sleeved on the narrow part and a plate part attached to the bottom surface of the wide part. The outer side of the plate part extends beyond the wide part, and the part of the plate part extending beyond the wide part forms the edge part.

7. The assembling method of the filter according to claim 1, characterized in that, a flared opening is formed at the top of the connecting hole.

8. The assembling method of the filter according to claim 7, characterized in that, the alignment fixture includes a carrier and a positioning structure, the positioning posts and the assembling holes provided on the carrier. The alignment fixture can be positioned above the filter through the positioning structure. The carrier is provided with positioning holes, and the positioning posts are vertically movably positioned in the positioning holes. The positioning posts include plugging column bodies with dimensions corresponding to those of the connecting holes and smaller than the dimensions of the flared opening; The inserting the positioning post into the connecting hole includes: positioning the alignment fixture above the cover plate so that the positioning posts correspond to the flared openings of the connector mounting seats, and the assembling holes correspond to the threaded holes; vertically moving the positioning posts so that the plugging column bodies are inserted into the connecting holes through the flared openings.

9. The assembling method of the filter according to claim 8, characterized in that, the positioning posts include main body parts, and the plugging column bodies extend downward from the middle of the bottom ends of the main body parts. A conical structure adapted to the flared opening is formed at the top of the plugging column bodies; when the plugging column bodies are completely inserted into the connecting holes, the conical structures are in contact with the flared openings, and the main body parts are pressed against the connector mounting seats.

10. The assembling method of the filter according to claim 8, characterized in that, the positioning posts are positioned in the positioning holes through bushings; heads are formed at the tops of the positioning posts, and the heads press against the tops of the bushings.

11. The assembling method of the filter according to claim 8, characterized in that, after the plugging column bodies are inserted into the connecting holes and before the plurality of fixing screws are tightened, the method further includes: fixing the positioning posts by using a fixture.

12. The assembling method of the filter according to claim 11, characterized in that, a plurality of boxes for installing the fixture are provided on the carrier.

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