CN212909450U

CN212909450U - Split assembled filter

Info

Publication number: CN212909450U
Application number: CN202021556322.1U
Authority: CN
Inventors: 李峰; 高秀华; 姚强
Original assignee: Chengdu Hongming Electronics Co Ltd
Current assignee: Chengdu Hongming Electronics Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-04-06
Anticipated expiration: 2030-07-31

Abstract

The utility model discloses a components of a whole that can function independently assembled wave filter, inductor install the middle part in the tube-shape shell, and the condenser is installed in the position that is close to the tip in the tube-shape shell, and tube-shape shell's whole section of thick bamboo wall diameter is the same, and first end spare is formed by big footpath section and path section interconnect, and big footpath section is connected with tube-shape shell's first end, is equipped with the external screw thread on the outer wall of path section, and second end part is held with tube-shape shell's second and. The utility model has the advantages that the cylindrical shell, the first end part and the second end part are independently processed and then assembled, so that the soldering flux can be thoroughly cleaned and dried, the residual problem caused by the fact that the soldering flux in the closed cavity of the product can not be cleaned is thoroughly solved, and the influence of the residual soldering flux on the performance of the product is avoided; because the welding and installation processes of the capacitor are not finished in a longer inner cavity, and only once heating welding is carried out, the capacitor reduces the thermal stress impact, and improves the long-term working reliability of the filter.

Description

Split assembled filter

Technical Field

The utility model relates to a wave filter especially relates to a components of a whole that can function independently assembled wave filter.

Background

A filter is an electronic device commonly used in electronic equipment, and is generally composed of a capacitor and an inductor. The common low-pass filter circuit structure has C type, L type, T type, pi type, etc., and has the functions of filtering high-frequency clutter, screening signals, filtering noise, inhibiting electromagnetic wave interference, etc.

The structure of the pi-type low-pass filter is shown in fig. 1, and includes a housing 4, a first capacitor 2, a second capacitor 3, an inductor 1, and welding columns 5, wherein the outer diameter of a first end of the housing 4 with openings at both ends is reduced, and the outer wall of a small diameter section of the housing 4 is provided with external threads, the outer diameter of a second end of the housing 4 is unchanged, the inductor 1 is disposed in the middle of an inner cavity 8 of the housing 4, the first capacitor 2 and the second capacitor 3 are respectively mounted at both ends of the housing 4, wherein the first capacitor 2 is welded and mounted at a step on the inner wall of the first end of the housing 4, the second capacitor 3 is welded and mounted at an inner wall of the housing 4 near the second end, the outer ends of the two welding columns 5 with inner ends respectively connected with the two capacitors extend out from both ends of the housing 4, and gaps in the housing 4 are filled with potting materials 6, also shown in fig. 1 is solder 7; during processing, the first capacitor 2 is firstly cleaned and dried after being welded, then the soldering flux is loaded into the inductor 1, and finally the second capacitor 3 is loaded and welded again.

The structure of the above conventional filter has the following drawbacks: a closed cavity can be formed between the two capacitors, so that residual soldering flux in the cavity cannot be cleaned, the residual soldering flux is caused, the soldering flux remained in the product is influenced by an electric field, temperature, humidity and the like in the long-term working process of the filter, the insulation resistance and the dielectric strength of the filter can be degraded, and the short circuit between a lead of the filter and a shell can be caused in serious cases; in addition, when the first capacitor 2 is welded, the capacitor is subjected to thermal stress shock due to the completion in the cylinder, and when the second capacitor 3 is welded, the first capacitor 2 inevitably is subjected to thermal stress shock again, so that the first capacitor 2 is repeatedly subjected to thermal stress shock, which may cause damage to the first capacitor to some extent, and reliability of the filter may be reduced.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a split assembled filter which is convenient for thoroughly removing the flux and the capacitor will not receive thermal stress impact when welding.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

the utility model provides a components of a whole that can function independently assembled filter, includes tube-shape shell, condenser and inductor, the inductor install in middle part in the tube-shape shell, the condenser install in the position that is close to the tip in the tube-shape shell, the whole section wall diameter of tube-shape shell is the same, components of a whole that can function independently assembled filter still includes the first end part of tube-shape and the second end part of tube-shape, first end part is formed by big footpath section and path section interconnect, big footpath section with the first end of tube-shape shell is connected, be equipped with the external screw thread on the outer wall of path section, the second end part with the second end of tube-shape shell is connected.

Preferably, in order to facilitate quick and stable connection and reduce the occupied space, the large-diameter section is pressed into the first end of the cylindrical shell to form an interference connection structure, and the second end part is pressed into the second end of the cylindrical shell to form the interference connection structure.

Preferably, in order to facilitate stable welding installation of the capacitor, the large-diameter section and the small-diameter section of the first end part are integrally formed, and the inner wall of the joint forms a first step for installing the corresponding capacitor; the inner end face of the second end part is recessed inwards to form a second step for mounting the corresponding capacitor.

Specifically, the capacitor comprises a first capacitor and a second capacitor, the first capacitor is welded and installed in the first step, the first capacitor is welded with the inner end of a first welding column, and the outer end of the first welding column extends out of the first end part; the second capacitor is welded in the second step, the second capacitor is welded with the inner end of the second welding column, and the outer end of the second welding column extends out of the second end part.

The beneficial effects of the utility model reside in that:

the utility model discloses a through independently processing and reassembling tube-shape shell, first end piece and second end piece, be convenient for carry out thorough washing and drying to the scaling powder after installing condenser welding on first end piece and second end piece, then be connected with the tube-shape shell, thoroughly solved the product airtight cavity scaling powder can't the clean residual problem that causes, stopped remaining scaling powder to the influence of producing the performance; because the welding and installation processes of the capacitor are not finished in a longer inner cavity, and only once heating welding is carried out, the capacitor reduces the thermal stress impact, and improves the long-term working reliability of the filter.

Drawings

Fig. 1 is an axial sectional view of a conventional pi-type low-pass filter;

fig. 2 is an axial sectional view of the split assembly filter of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 2, the split assembly filter of the present invention includes a cylindrical housing 15, a first capacitor 14, a first welding column 9, a second capacitor 18, a second welding column 20, an inductor 17, a cylindrical first end part 12 and a cylindrical second end part 19, wherein the inductor 17 is installed in the middle of the cylindrical housing 15, the first capacitor 14 and the second capacitor 18 are installed in the cylindrical housing 15 near the ends of the two ends, the diameters of the entire section of the cylindrical housing 15 are the same, the first end part 12 is formed by connecting a large diameter section 13 and a small diameter section 11, the large diameter section 13 is connected with the first end of the cylindrical housing 15 and pressed into the first end of the cylindrical housing 15 to form an interference connection structure, the outer wall of the small diameter section 11 is provided with an external thread 10, the second end part 19 is connected with the second end of the cylindrical housing 15 and the second end part 19 is pressed into the second end of the cylindrical housing 15 to form an interference connection structure, the large-diameter section 13 and the small-diameter section 11 of the first end part 12 are integrally formed, the inner wall of the joint forms a first step for mounting a first capacitor 14, the first capacitor 14 is welded in the first step, the first capacitor 14 is welded with the inner end of the first welding column 9, the outer end of the first welding column 9 extends out of the first end part 12, the inner end face of the second end part 19 is recessed to form a second step for mounting a second capacitor 18, the second capacitor 18 is welded in the second step, the second capacitor 18 is welded with the inner end of the second welding column 20, the outer end of the second welding column 20 extends out of the second end part 19, and gaps in the cylindrical shell 15 are filled with potting materials 16.

As shown in fig. 2, during processing, the cylindrical housing 15, the first end member 12 and the second end member 19 are independently processed and molded, then the first capacitor 14 is welded and installed in the first step of the first end member 12, the second capacitor 18 is welded and installed in the second step of the second end member 19, then the inner end of the first welding column 9 is welded with the first capacitor 14, the inner end of the second welding column 20 is welded with the second capacitor 18, then the soldering flux in the first step and the second step is thoroughly cleaned and dried, finally the large-diameter section 13 of the first end member 12 is pressed into the first end of the cylindrical housing 15 to form an interference connection structure, and the second end member 19 is pressed into the second end of the cylindrical housing 15 to form an interference connection structure, so that the assembly of the filter is completed. Therefore, the problem of residue caused by the fact that the soldering flux in the closed cavity of the product cannot be cleaned completely is thoroughly solved, the influence of the residual soldering flux on the performance of the product is avoided, the thermal stress impact on the first capacitor 14 and the second capacitor 18 is reduced, and the reliability of long-term work of the filter is improved.

Description of the drawings: the names of the components in the above description are the same as the names of the corresponding components in the background, but different reference numerals are used to distinguish the new structure from the conventional structure.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims

1. A split assembly type filter comprises a cylindrical shell, a capacitor and an inductor, wherein the inductor is arranged in the middle of the cylindrical shell, and the capacitor is arranged in the cylindrical shell at a position close to an end part, and is characterized in that: the split assembled filter comprises a cylindrical shell, a first end part and a cylindrical second end part, wherein the diameter of the whole section of the cylindrical shell is the same, the first end part is formed by connecting a large-diameter section and a small-diameter section, the large-diameter section is connected with the first end of the cylindrical shell, an external thread is arranged on the outer wall of the small-diameter section, and the second end part is connected with the second end of the cylindrical shell.

2. The split assembly filter of claim 1, wherein: the large-diameter section is pressed into the first end of the cylindrical shell to form an interference connection structure, and the second end part is pressed into the second end of the cylindrical shell to form an interference connection structure.

3. The split assembly filter according to claim 1 or 2, wherein: the large-diameter section and the small-diameter section of the first end part are integrally formed, and the inner wall of the joint of the large-diameter section and the small-diameter section forms a first step for mounting the corresponding capacitor; the inner end face of the second end part is recessed inwards to form a second step for mounting the corresponding capacitor.

4. The split assembly filter of claim 3, wherein: the capacitor comprises a first capacitor and a second capacitor, the first capacitor is welded and installed in the first step, the first capacitor is welded with the inner end of the first welding column, and the outer end of the first welding column extends out of the first end piece; the second capacitor is welded in the second step, the second capacitor is welded with the inner end of the second welding column, and the outer end of the second welding column extends out of the second end part.