CN113258233A - Self-locking tuning screw, machining method and cavity filter - Google Patents
Self-locking tuning screw, machining method and cavity filter Download PDFInfo
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- CN113258233A CN113258233A CN202110690484.7A CN202110690484A CN113258233A CN 113258233 A CN113258233 A CN 113258233A CN 202110690484 A CN202110690484 A CN 202110690484A CN 113258233 A CN113258233 A CN 113258233A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- H01P11/007—Manufacturing frequency-selective devices
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Abstract
The invention relates to a self-locking tuning screw and a cavity filter, which comprise a rod body, wherein the middle lower part of the rod body is provided with a first external thread, the upper surface of the rod body is coaxially provided with an annular step position, and a butterfly-shaped elastic sheet, a thread sleeve and a locking ring are sequentially arranged on the annular step position from bottom to top; the upper ends of the locking ring and the rod body are provided with straight screw holes; the outer surface of the threaded sleeve is provided with a second external thread; when the butterfly-shaped elastic sheet is not deformed and is in a fit state with the thread sleeve, the thread lines of the first external thread and the second external thread are on the same thread curve; under the condition that the butterfly-shaped elastic sheet is not deformed and the thread sleeve is attached to the butterfly-shaped elastic sheet and the locking ring, the two straight screw ports are positioned on the same straight line and are partially communicated; the self-locking operation is very simple, the self-locking stress point is large, the stability is good, the overall appearance structure basically does not need to be changed, the influence on the overall strength is small, the processing cost is high and low, and the device is very suitable for popularization.
Description
Technical Field
The invention relates to the technical field of cavity filters, in particular to a self-locking tuning screw, a processing method and a cavity filter.
Background
The cavity filter is an important component applied in the communication field, and generally comprises a cavity and a cover plate, wherein a resonant column is arranged in the cavity, a tuning screw rod opposite to the resonant column is arranged on the cover plate in a penetrating way, and the space shape of the inner cavity is changed by depending on the distance between the tuning screw rod and the resonant column;
at present, the tuning screw basically does not have a self-locking function, the self-locking tuning screw structures designed in some published patents have the problems of small self-locking stress point, poor stability, capability of changing the overall structure, difficulty in self-locking operation, great weakening of the overall strength, high processing cost and the like, are difficult to popularize and urgently need a self-locking tuning screw capable of overcoming the problems.
Disclosure of Invention
The present invention provides a self-locking tuning screw, a method for processing the self-locking tuning screw, and a cavity filter, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the self-locking tuning screw is constructed and comprises a screw body, wherein a first external thread is arranged at the middle lower part of the screw body, an annular step position is coaxially arranged on the surface of the upper part of the screw body, and a butterfly-shaped elastic sheet, a thread sleeve and a locking ring are sequentially arranged on the annular step position from bottom to top; the butterfly-shaped elastic sheet is sleeved on the rod body, the threaded sleeve is sleeved on the rod body in a longitudinal sliding manner, and the locking ring is in threaded connection with the rod body; the upper end of the locking ring exceeds the upper end of the bar body, and the upper ends of the locking ring and the bar body are provided with straight screw ports; the outer surface of the threaded sleeve is provided with a second external thread; when the butterfly-shaped elastic sheet is not deformed and is in a fit state with the thread sleeve, the thread lines of the first external thread and the second external thread are on the same thread curve; the outer diameter of the butterfly-shaped elastic sheet does not exceed the outer diameter of the bottom of the threaded groove of the first external thread; and under the condition that the butterfly-shaped elastic sheet is not deformed and the thread sleeve is attached to the butterfly-shaped elastic sheet and the locking ring, the two straight screw ports are positioned on the same straight line and are partially communicated.
According to the self-locking tuning screw rod, the inner bottom surfaces of the two straight screw holes are flush when the butterfly-shaped elastic sheet is not deformed and the thread sleeves are attached to the butterfly-shaped elastic sheet and the locking ring.
The self-locking tuning screw rod is characterized in that a plurality of longitudinal guide strips are arranged on the inner side wall of the annular step position, and a sliding groove matched with the guide strips is formed in the inner wall of the threaded sleeve.
The invention relates to a self-locking tuning screw, wherein a gasket is arranged between a locking ring and a threaded sleeve, and the gasket is annular and coaxially fixed at the upper end of the threaded sleeve.
A self-locking tuning screw machining method is used for machining the self-locking tuning screw, and is characterized by comprising the following steps:
the first step is as follows: selecting a rod body with external threads, processing a coaxial annular step position on the upper part of the rod body, forming or welding a longitudinal guide strip on the annular step position, processing threads on the upper part of the annular step position, and processing a straight screw hole on the top of the rod body;
the second step is that: sequentially sleeving a butterfly-shaped elastic sheet and a threaded sleeve with a sliding groove matched with the guide strip into the annular step position;
the third step: and sleeving a locking ring with a straight screw hole on the rod body, and screwing the locking ring in a matching manner with the thread on the annular step.
A cavity filter comprises a resonant cavity and a cover plate for covering the resonant cavity; the cover plate is connected with the self-locking tuning screw in a penetrating way.
The invention has the beneficial effects that: during assembly, the two straight screw ports are simultaneously inserted through the screwdriver, the rod body is screwed into a proper installation depth, then the screwdriver is moved upwards for a distance, only the straight screw port at the top of the rod body is withdrawn and still remained in the straight screw port on the locking ring, at the moment, the locking ring is rotated downwards for a certain distance relative to the rod body through the rotation of the screwdriver, the locking ring can downwards extrude the thread sleeve, so that the second external thread outside the thread sleeve is tightly attached to the inner wall of the thread port on the cover plate, the distance between the first external thread and the second external thread is slightly reduced, therefore, the clamping force on the threaded hole on the cover plate is improved, meanwhile, the state is kept through the elasticity of the butterfly-shaped elastic sheet, self-locking can be completed, otherwise, the unlocking and dismounting operations can be rapidly carried out, at the moment, the butterfly-shaped elastic sheet provides the resetting force for the thread sleeve, the self-locking operation is very simple, the self-locking stress point is larger, the stability is good, the whole appearance structure basically does not need to be changed (the cover plate does not need to be additionally changed), the influence on the whole strength is small, the processing cost is high and low, and the novel electric heating cover plate is very suitable for popularization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only part of the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive efforts according to the accompanying drawings:
FIG. 1 is a cross-sectional view of a self-locking tuning screw in accordance with a preferred embodiment of the present invention;
fig. 2 is a top view of a self-locking tuning screw in accordance with a preferred embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without inventive step, are within the scope of the present invention.
As shown in fig. 1 and also shown in fig. 2, the self-locking tuning screw and cavity filter according to the preferred embodiment of the present invention includes a rod 1, wherein a first external thread 10 is disposed at a middle-lower portion of the rod 1, an annular step 11 is coaxially disposed on an upper surface of the rod 1, and a butterfly spring 2, a thread bushing 3 and a locking ring 4 are sequentially disposed on the annular step 11 from bottom to top; the butterfly-shaped elastic sheet 2 is sleeved on the rod body 1, the thread sleeve 3 is longitudinally sleeved on the rod body 1 in a sliding manner, and the locking ring 4 is in threaded connection with the rod body 1; the upper end of the locking ring 4 exceeds the upper end of the bar body 1, and the upper ends of the locking ring 4 and the bar body 1 are both provided with a straight screw port 5; the outer surface of the thread bush 3 is provided with a second external thread 30; when the butterfly-shaped elastic sheet 2 is not deformed and is attached to the thread sleeve 3, the thread lines of the first external thread 10 and the second external thread 30 are on the same thread curve; the outer diameter of the butterfly-shaped elastic sheet 2 is not more than the outer diameter of the bottom of the thread groove of the first external thread 10; under the condition that the butterfly-shaped elastic sheet 2 is not deformed and the thread sleeve 3, the butterfly-shaped elastic sheet 2 and the locking ring 4 are attached, the two straight-line screw ports 5 are positioned on the same straight line and are partially communicated;
during assembly, the two straight screw ports 5 are simultaneously inserted through the screwdriver, the rod body 1 is screwed into a proper installation depth, then the screwdriver is moved upwards for a distance, only the straight screw port 5 at the top of the rod body 1 is withdrawn and still remained in the straight screw port 5 on the locking ring 4, at the moment, the locking ring 4 is rotated downwards for a certain distance relative to the rod body 1 through the rotation of the screwdriver, the locking ring 4 downwards extrudes the thread sleeve 3, so that the second external thread 30 outside the thread sleeve 3 is tightly attached to the inner wall of the thread port on the cover plate, the distance between the first external thread and the second external thread is slightly reduced, thereby improving the clamping force on the threaded hole on the cover plate, simultaneously, the state is kept through the elasticity of the butterfly-shaped elastic sheets, self-locking can be completed, otherwise, the unlocking and dismounting operations can be rapidly carried out, at the moment, the butterfly-shaped elastic sheets provide the reset force on the thread sleeve, the self-locking operation is simple, the self-locking stress point is large, the stability is good, the overall appearance structure basically does not need to be changed (the cover plate does not need to be additionally changed), the influence on the overall strength is small, the processing cost is high and low, and the self-locking device is very suitable for popularization.
Preferably, the inner bottom surfaces of the two straight screw ports 5 are flush when the butterfly-shaped elastic sheet 2 is not deformed and the thread sleeve 3 is attached to the butterfly-shaped elastic sheet 2 and the locking ring 4; the position of the locking ring 4 at present can be conveniently determined through the alignment condition of the two straight screw ports 5 while the disassembly and assembly operations are convenient.
Preferably, a plurality of longitudinal guide bars 110 are arranged on the inner side wall of the annular step 11, and a sliding groove 31 matched with the guide bars 110 is formed in the inner wall of the threaded sleeve 3; convenient assembly and longitudinal guiding.
Preferably, a gasket 32 is arranged between the locking ring 4 and the threaded sleeve 3, and the gasket 32 is annular and coaxially fixed at the upper end of the threaded sleeve 3; the abrasion of the locking ring 4 when the threaded sleeve 3 is extruded is reduced, and the extrusion reliability is guaranteed.
A processing method of a self-locking tuning screw is used for processing the self-locking tuning screw, and comprises the following steps:
the first step is as follows: selecting a rod body with external threads, processing a coaxial annular step position on the upper part of the rod body, forming or welding a longitudinal guide strip on the annular step position, processing threads on the upper part of the annular step position, and processing a straight screw hole on the top of the rod body;
the second step is that: sequentially sleeving a butterfly-shaped elastic sheet and a threaded sleeve with a sliding groove matched with the guide strip into the annular step position;
the third step: sleeving a locking ring with a straight screw hole on the rod body, and screwing the locking ring in a matching manner with the thread on the annular step;
the processing and assembling are convenient, the related processing operations are all conventional processing operations, and the processing cost and reliability are guaranteed.
A cavity filter comprises a resonant cavity and a cover plate for sealing the resonant cavity; the self-locking tuning screw rod is connected on the cover plate in a penetrating way; by the self-locking tuning screw rod, the performance reliability of the cavity filter can be greatly improved while the convenience of tuning screw rod adjustment is guaranteed.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (6)
1. A self-locking tuning screw is characterized by comprising a screw body, wherein a first external thread is arranged at the middle lower part of the screw body, an annular step position is coaxially arranged on the surface of the upper part of the screw body, and a butterfly-shaped elastic sheet, a thread sleeve and a locking ring are sequentially arranged on the annular step position from bottom to top; the butterfly-shaped elastic sheet is sleeved on the rod body, the threaded sleeve is sleeved on the rod body in a longitudinal sliding manner, and the locking ring is in threaded connection with the rod body; the upper end of the locking ring exceeds the upper end of the bar body, and the upper ends of the locking ring and the bar body are provided with straight screw ports; the outer surface of the threaded sleeve is provided with a second external thread; when the butterfly-shaped elastic sheet is not deformed and is in a fit state with the thread sleeve, the thread lines of the first external thread and the second external thread are on the same thread curve; the outer diameter of the butterfly-shaped elastic sheet does not exceed the outer diameter of the bottom of the threaded groove of the first external thread; and under the condition that the butterfly-shaped elastic sheet is not deformed and the thread sleeve is attached to the butterfly-shaped elastic sheet and the locking ring, the two straight screw ports are positioned on the same straight line and are partially communicated.
2. The self-locking tuning screw according to claim 1, wherein the inner bottom surfaces of the two in-line screw holes are flush when the butterfly spring plate is not deformed and the thread bush is attached to the butterfly spring plate and the locking ring.
3. The self-locking tuning screw according to claim 1, wherein a plurality of longitudinal guide bars are disposed on an inner side wall of the annular step, and a sliding groove engaged with the guide bars is formed on an inner wall of the threaded sleeve.
4. The self-locking tuning screw of claim 1, wherein a washer is disposed between the locking ring and the threaded sleeve, the washer being annularly and coaxially secured to the upper end of the threaded sleeve.
5. A method of manufacturing a self-locking tuning screw, for manufacturing a self-locking tuning screw according to any one of claims 1 to 4, comprising the steps of:
the first step is as follows: selecting a rod body with external threads, processing a coaxial annular step position on the upper part of the rod body, forming or welding a longitudinal guide strip on the annular step position, processing threads on the upper part of the annular step position, and processing a straight screw hole on the top of the rod body;
the second step is that: sequentially sleeving a butterfly-shaped elastic sheet and a threaded sleeve with a sliding groove matched with the guide strip into the annular step position;
the third step: and sleeving a locking ring with a straight screw hole on the rod body, and screwing the locking ring in a matching manner with the thread on the annular step.
6. A cavity filter is characterized by comprising a resonant cavity and a cover plate for sealing the resonant cavity; the cover plate is connected with the self-locking tuning screw rod of any one of claims 1 to 4 in a penetrating way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110690484.7A CN113258233B (en) | 2021-06-22 | 2021-06-22 | Self-locking tuning screw, machining method and cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110690484.7A CN113258233B (en) | 2021-06-22 | 2021-06-22 | Self-locking tuning screw, machining method and cavity filter |
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| Publication Number | Publication Date |
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| CN113258233A true CN113258233A (en) | 2021-08-13 |
| CN113258233B CN113258233B (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110690484.7A Active CN113258233B (en) | 2021-06-22 | 2021-06-22 | Self-locking tuning screw, machining method and cavity filter |
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| CN (1) | CN113258233B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914649A (en) * | 2022-05-19 | 2022-08-16 | 昆山立讯射频科技有限公司 | Filter and communication apparatus |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6104263A (en) * | 1997-05-28 | 2000-08-15 | Hewlett-Packard Company | Capacitive tuning screw having a compressible tip |
| CN104405295A (en) * | 2014-10-23 | 2015-03-11 | 中国石油集团长城钻探工程有限公司 | Coiled tubing drilling anti-torque device |
| US20150280302A1 (en) * | 2014-04-01 | 2015-10-01 | Ace Technologies Corporation | Cavity filter |
| CN206639706U (en) * | 2017-02-20 | 2017-11-14 | 深圳华制智能制造技术有限公司 | Adjustable gate magnetic switch |
| CN110280634A (en) * | 2019-07-22 | 2019-09-27 | 南京邮电大学 | Crank screw rod composite drive machine for press-bending metal sheet with multiple-working mode |
| CN110600837A (en) * | 2019-08-14 | 2019-12-20 | 张毅 | Self-locking assembly and tuning device |
| CN209843918U (en) * | 2019-06-05 | 2019-12-24 | 深圳金泰格机电股份有限公司 | Tuning screw with self-locking device |
| CN210379366U (en) * | 2019-09-02 | 2020-04-21 | 浙江荣亿精密机械股份有限公司 | Tuning self-locking screw for filter cover plate |
| CN111193084A (en) * | 2020-01-07 | 2020-05-22 | 朱承风 | Filter cover plate |
-
2021
- 2021-06-22 CN CN202110690484.7A patent/CN113258233B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6104263A (en) * | 1997-05-28 | 2000-08-15 | Hewlett-Packard Company | Capacitive tuning screw having a compressible tip |
| US20150280302A1 (en) * | 2014-04-01 | 2015-10-01 | Ace Technologies Corporation | Cavity filter |
| CN104405295A (en) * | 2014-10-23 | 2015-03-11 | 中国石油集团长城钻探工程有限公司 | Coiled tubing drilling anti-torque device |
| CN206639706U (en) * | 2017-02-20 | 2017-11-14 | 深圳华制智能制造技术有限公司 | Adjustable gate magnetic switch |
| CN209843918U (en) * | 2019-06-05 | 2019-12-24 | 深圳金泰格机电股份有限公司 | Tuning screw with self-locking device |
| CN110280634A (en) * | 2019-07-22 | 2019-09-27 | 南京邮电大学 | Crank screw rod composite drive machine for press-bending metal sheet with multiple-working mode |
| CN110600837A (en) * | 2019-08-14 | 2019-12-20 | 张毅 | Self-locking assembly and tuning device |
| CN210379366U (en) * | 2019-09-02 | 2020-04-21 | 浙江荣亿精密机械股份有限公司 | Tuning self-locking screw for filter cover plate |
| CN111193084A (en) * | 2020-01-07 | 2020-05-22 | 朱承风 | Filter cover plate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114914649A (en) * | 2022-05-19 | 2022-08-16 | 昆山立讯射频科技有限公司 | Filter and communication apparatus |
| CN114914649B (en) * | 2022-05-19 | 2023-10-20 | 苏州立讯技术有限公司 | Filter and communication device |
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| Publication number | Publication date |
|---|---|
| CN113258233B (en) | 2022-10-21 |
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