阅读说明：本技术 腔体滤波器、腔体及其制造方法 (Cavity filter, cavity and manufacturing method thereof ) 是由 李炳才 陈启泰 于 2020-05-21 设计创作，主要内容包括：本发明提供一种腔体滤波器、腔体及其制造方法,腔体设有贯通的透气阀安装孔,透气阀安装孔用于安装透气阀,透气阀安装孔包括螺纹孔段和沉孔段,沉孔段靠近腔体的外表面,螺纹孔段靠近腔体的内表面。本发明提供的腔体结构新颖、制造方便,由于增设有沉孔段,在进行喷粉处理时可以通过封堵件封堵沉孔段,喷粉完成后将封堵件取走,粉渣不容易影响透气阀装入螺纹孔段,提升了透气阀安装的方便性。(The invention provides a cavity filter, a cavity and a manufacturing method thereof. The cavity provided by the invention is novel in structure and convenient to manufacture, and the counter bore section is additionally arranged, so that the counter bore section can be blocked by the blocking piece during powder spraying treatment, the blocking piece is taken away after the powder spraying is finished, powder slag does not easily influence the installation of the vent valve into the threaded hole section, and the convenience in installation of the vent valve is improved.)

1. The cavity of the cavity filter is characterized in that the cavity is provided with a through vent valve mounting hole, the vent valve mounting hole is used for mounting a vent valve, the vent valve mounting hole comprises a threaded hole section and a counter bore section, the counter bore section is close to the outer surface of the cavity, and the threaded hole section is close to the inner surface of the cavity.

2. The cavity of the cavity filter of claim 1, wherein: the diameter of the counter bore section is larger than that of the threaded hole section, the joint of the counter bore section and the threaded hole section forms an assembly table, the assembly table is used for arranging a plugging piece, and the plugging piece is used for preventing powder from entering the counter bore section and the threaded hole section when a powder spraying process is carried out.

3. The cavity of the cavity filter of claim 1, wherein: the ventilation valve mounting hole further comprises an inclined hole section, and the inclined hole section is located on one side, far away from the threaded hole section, of the counter bore section.

4. The cavity of the cavity filter of claim 3, wherein: the outer surface of the cavity and the inclined hole section are provided with powder spraying layers, and the threaded hole section and the counter bore section are not provided with the powder spraying layers.

5. The cavity filter is characterized by comprising a cavity and a cover plate, wherein the cover plate covers the cavity to form a resonant cavity, the cover plate or the cavity is provided with a through vent valve mounting hole, the vent valve mounting hole is used for mounting a vent valve, the vent valve mounting hole comprises a threaded hole section and a counter bore section, the counter bore section is close to the outer surface of the cavity, and the threaded hole section is close to the inner surface of the cavity.

6. The cavity filter of claim 5, wherein: the diameter of the counter bore section is larger than that of the threaded hole section, the joint of the counter bore section and the threaded hole section forms an assembly table, the assembly table is used for arranging a plugging piece, and the plugging piece is used for preventing powder from entering the counter bore section and the threaded hole section when a powder spraying process is carried out.

7. The cavity filter of claim 5, wherein: the ventilation valve mounting hole further comprises an inclined hole section, and the inclined hole section is located on one side, far away from the threaded hole section, of the counter bore section.

8. The cavity filter of claim 7, wherein: the cover plate, the outer surface of the cavity and the inclined hole section are provided with powder spraying layers, and the threaded hole section and the counter bore section are not provided with the powder spraying layers.

9. A method for manufacturing a cavity of a cavity filter, comprising:

forming a blank through die casting or numerical control machining;

forming a threaded bore section on the blank;

forming a counter bore section on the blank;

arranging a plugging piece in the counter bore section;

and spraying powder on the outer surface of the blank.

10. The method of manufacturing a cavity of a cavity filter according to claim 9, wherein: and forming an inclined hole section on the blank, wherein the inclined hole section is positioned on one side of the counter bore section, which is far away from the threaded hole section.

Technical Field

The invention relates to the technical field of cavity filters, in particular to a cavity filter, a cavity and a manufacturing method of the cavity.

Background

In a base station system for mobile communication, communication signals carrying communication data in a specific frequency range are generally transmitted through a transmitting antenna, and the communication signals are received through a receiving antenna. The signal received by the receiving antenna contains not only the communication signal carrying the communication data within the specific frequency range, but also a number of spurious or interfering signals outside the specific frequency range. To obtain a communication signal carrying communication data in a specific frequency range transmitted by a transmitting antenna from a signal received by a receiving antenna, the signal received by the receiving antenna is usually filtered by a cavity filter, so as to filter out noise or interference signals outside the specific frequency of the communication signal carrying communication data.

The cavity filter is widely used as a frequency selection device. The outer surface of the cavity filter is generally required to be subjected to powder spraying treatment to improve corrosion resistance, and during the powder spraying treatment, a threaded part is generally adopted to block a mounting hole of the vent valve before powder spraying is carried out.

The existing vent valve mounting hole comprises a threaded hole section relatively close to the inner surface and an inclined hole section relatively close to the outer surface, accumulated powder is easily generated at the intersection of the inclined hole section and the threaded hole section during powder spraying, the accumulated powder at the position reduces the channel area of the opening of the threaded hole section, the adhesion is tight and the cleaning is not easy, and the accumulated powder easily causes installation obstruction to the vent valve in the threaded hole section.

Disclosure of Invention

The application provides a cavity filter, a cavity and a manufacturing method thereof, and aims to solve the technical problem that accumulated powder is easy to cause installation obstruction to a threaded hole section of a vent valve during powder spraying treatment in the prior art.

In order to solve the technical problem, the application adopts a technical scheme that: the cavity of the cavity filter is provided with a through vent valve mounting hole, the vent valve mounting hole is used for mounting a vent valve, the vent valve mounting hole comprises a threaded hole section and a counter bore section, the counter bore section is close to the outer surface of the cavity, and the threaded hole section is close to the inner surface of the cavity.

According to a specific embodiment of the present invention, the diameter of the counterbore section is greater than the diameter of the threaded hole section, a joint of the counterbore section and the threaded hole section forms an assembly table, the assembly table is used for arranging a plugging member, and the plugging member is used for preventing powder from entering the counterbore section and the threaded hole section during a powder injection process.

According to a specific embodiment of the present invention, the vent valve mounting hole further includes an inclined hole section, and the inclined hole section is located on a side of the counter bore section away from the threaded hole section.

According to an embodiment of the present invention, the outer surface of the cavity and the inclined hole section are provided with powder spraying layers, and the threaded hole section and the counter bore section are not provided with the powder spraying layers.

In order to solve the technical problem, the application adopts a technical scheme that: the cavity filter comprises a cavity and a cover plate, wherein the cover plate covers the cavity to form a resonant cavity, the cover plate or the cavity is provided with a through vent valve mounting hole, the vent valve mounting hole is used for mounting a vent valve, the vent valve mounting hole comprises a threaded hole section and a counter bore section, the counter bore section is close to the outer surface of the cavity, and the threaded hole section is close to the inner surface of the cavity.

According to an embodiment of the present invention, the cover plate, the outer surface of the cavity and the inclined hole section are provided with powder spraying layers, and the threaded hole section and the counter-bore section are not provided with the powder spraying layers.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a method for manufacturing a cavity of a cavity filter, including:

forming a blank through die casting or numerical control machining;

forming a threaded bore section on the blank;

forming a counter bore section on the blank;

arranging a plugging piece in the counter bore section;

and spraying powder on the outer surface of the blank.

According to a specific embodiment of the present invention, the method further includes forming a slant hole section on the blank, wherein the slant hole section is located on a side of the counter bore section away from the threaded hole section.

The beneficial effect of this application is: different from the situation of the prior art, the cavity provided by the invention is novel in structure and convenient to manufacture, the counter bore section is plugged by the plugging piece during powder spraying treatment due to the additional counter bore section, the plugging piece is taken away after the powder spraying is finished, powder slag does not easily influence the installation of the vent valve in the threaded hole section, and the installation convenience of the vent valve is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic partial cross-sectional structure diagram of a cavity filter according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1, an embodiment of the present invention provides a cavity of a cavity filter, where the cavity is provided with a vent valve installation hole 100 therethrough, the vent valve installation hole 100 is used for installing a vent valve (not shown), the vent valve installation hole 100 includes a threaded hole section 110 and a counter bore section 120, the counter bore section 120 is close to an outer surface 101 of the cavity, and the threaded hole section 110 is close to an inner surface 102 of the cavity.

Specifically, the diameter of the counterbore section 120 is larger than that of the threaded hole section 110, the length of the counterbore section 120 can be smaller than that of the threaded hole section 110, and the joint of the counterbore section 120 and the threaded hole section 110 forms an assembly table used for arranging a plugging piece (not shown) for preventing powder from entering the counterbore section 120 and the threaded hole section 110 when the powder spraying process is carried out.

Further, the vent valve mounting hole 100 further includes an inclined hole section 130, and the inclined hole section 130 is located on a side of the counter bored section 120 away from the threaded hole section 110.

The outer surface 101 of the cavity and the angled bore section 130 are provided with a powder coating (not shown), and the threaded bore section 110 and the counterbore section 120 are not provided with a powder coating.

Since the diameter of the counter bore section 120 is larger than that of the threaded bore section 110, even if powder deposits exist at the inner end (the end with the smaller diameter) of the inclined bore section 130, the powder deposits hardly affect the passage area at the opening of the threaded bore section 110, and installation obstruction of the vent valve in the threaded bore section 110 is not easily caused.

The embodiment of the invention also provides a cavity filter, which comprises a cavity, a cover plate, a resonance tube (not shown in the figure), a tuning screw rod (not shown in the figure) and other components, wherein the cover plate covers the cavity to form a resonant cavity, the resonance tube is arranged in the resonant cavity, and the tuning screw rod penetrates through the cover plate or the cavity to extend into the resonant cavity and is opposite to the resonance tube for adjusting radio frequency parameters.

The cover plate or the cavity is provided with a through vent valve mounting hole 100, the vent valve mounting hole 100 is used for mounting a vent valve (not shown in the figure), the vent valve mounting hole 100 comprises a threaded hole section 110 and a counter bore section 120, the counter bore section 120 is close to the outer surface 101 of the cavity, and the threaded hole section 110 is close to the inner surface 102 of the cavity.

Specifically, the diameter of the counterbore section 120 is larger than that of the threaded hole section 110, the length of the counterbore section 120 can be smaller than that of the threaded hole section 110, and the joint of the counterbore section 120 and the threaded hole section 110 forms an assembly table used for arranging a plugging piece (not shown) for preventing powder from entering the counterbore section 120 and the threaded hole section 110 when the powder spraying process is carried out.

Further, the vent valve mounting hole 100 further includes an inclined hole section 130, and the inclined hole section 130 is located on a side of the counter bored section 120 away from the threaded hole section 110.

The cover plate, the outer surface 101 of the cavity, and the angled bore section 130 are provided with a powder coating (not shown), and the threaded bore section 110 and the counterbore section 120 are not provided with a powder coating.

Since the diameter of the counter bore section 120 is larger than that of the threaded bore section 110, even if powder deposits exist at the inner end (the end with the smaller diameter) of the inclined bore section 130, the powder deposits hardly affect the passage area at the opening of the threaded bore section 110, and installation obstruction of the vent valve in the threaded bore section 110 is not easily caused.

The embodiment of the invention also provides a method for manufacturing the cavity of the cavity filter, which comprises the following steps:

forming a blank by adopting an aluminum or aluminum alloy material through die casting or numerical control processing;

forming a threaded bore section 110 in the blank;

forming a counter bore section 120 on the blank, wherein the connection of the counter bore section 120 and the threaded bore section 110 forms an assembly station;

arranging a plugging piece on the counter bore section 120, wherein the plugging piece can be a silica gel plug and is limited and assembled through an assembly table;

powder is sprayed on the outer surface 101 of the blank.

The method of manufacturing further includes forming a slanted hole section 130 in the blank, the slanted hole section 130 being located on a side of the counter bored section 120 remote from the threaded hole section 110.

In summary, those skilled in the art can easily understand that the cavity provided by the invention has a novel structure and is convenient to manufacture, because the counter bore section 120 is additionally arranged, the counter bore section 120 can be blocked by the blocking piece during powder spraying treatment, and the blocking piece is taken away after the powder spraying is finished, so that the powder slag does not easily influence the installation of the vent valve into the threaded hole section 110, and the installation convenience of the vent valve is improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.