CN103811836A - Cavity filter and screw device - Google Patents
Cavity filter and screw device Download PDFInfo
- Publication number
- CN103811836A CN103811836A CN201210438961.1A CN201210438961A CN103811836A CN 103811836 A CN103811836 A CN 103811836A CN 201210438961 A CN201210438961 A CN 201210438961A CN 103811836 A CN103811836 A CN 103811836A
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- locking member
- screw
- tuning screw
- screw rod
- cavity
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Abstract
The invention discloses a cavity filter comprising an enclosed cavity formed at least one surface, and a tuning screw device assembled on at least one surface. The tuning screw device comprises a tuning screw rod at least partially in threaded connection with the cavity and a locking member for locking the tuning screw rod. The tuning screw rod and the locking member are screwed in a threaded hole on the cavity. One end of the locking member is in abutting joint with one end of the turning screw rod to generate a pre-tightening force to lock the tuning screw rod. The other end of the locking member does not protrude from the threaded hole. The screw rod of the tuning screw device of the cavity filter provided by the invention has a good locking effect and is not liable to loosen. And the screw device can be arranged under a locking workpiece surface, so that the external space of the locking workpiece is reduced. The tuning screw rod and the locking member are easy to process and can be repeatedly used.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of cavity body filter and screw device.
Background technology
Filter is widely used in the communications field as a kind of frequency selection device, especially field of radio frequency communication.In the base station transmitting and receiving at communication system settling signal, filter is used to select signal of communication, the clutter outside filtering communication signal frequency or interference signal.
At present, in mobile communication base station system, generally with cavity body filter, the signal of antenna transmission and reception is carried out to frequency selection.Cavity body filter comprises cavity and cover plate, is provided with multiple cavitys on this cavity.The bottom that forms each cavity on this cavity is provided with resonatron.This resonatron inside is hollow form, forms resonant cavity.On the cover board the position corresponding with the resonant cavity of this resonatron offers screw, and a tuning screw coordinates with this screw, and gos deep in this cavity.By adjusting this tuning screw, the relative position of change and this resonatron, reaches the object of adjusting resonance frequency.
But, in the transportation of this cavity body filter and installation process, there will be unavoidably and jolt and shake, cause this tuning screw to occur loosening, even come off, and then affect the filtering performance of whole cavity body filter, before using this cavity body filter, also need it to debug further, expend a large amount of energy and times, be unfavorable for improving the installation effectiveness of cavity body filter; Becoming flexible also easily appears in use procedure in this tuning screw after installation simultaneously, causes affecting the performance index of cavity body filter.
As shown in Figure 1, it,, by nut 2 precompressed elastomeric pads 3, makes to produce pretightning force between screw rod 1 and cover plate 4, thereby reaches screw threads for fastening, locking between screw rod 1 and cover plate 4 anti-looseness mechanism of existing tuning screw.But this anti-looseness mechanism counterpart is many, when installation fee; And nut 2 and shell fragment 3 take up room larger.
In sum, obviously there is inconvenience and defect in existing screw device in actual use, so be necessary to be improved.
Summary of the invention
The invention provides a kind of cavity body filter, reduced the bulk of locking mechanism, saved space for product design and only need once assemble and just can reach fastening locking effect, convenient and swift, improve production efficiency.
To achieve these goals, cavity body filter provided by the invention, comprise the cavity of the sealing being formed by least one face, and be assemblied in the tuning screw device at least one face, described tuning screw device comprises the tuning screw that is threaded with cavity at least partly and for locking the locking member of pair described tuning screw, described tuning screw and described locking member are all bolted in the screwed hole on described cavity, one end of described locking member is docked with one end of described tuning screw and is produced pretightning force lock pair tuning screw, the other end of described locking member does not protrude from described screwed hole.
The present invention also provides a kind of screw device, comprise the first screw rod and lock the locking member of paying the first screw rod, described the first screw rod and described locking member are all bolted in screwed hole, one end of described locking member is docked with one end of described the first screw rod and is produced pretightning force lock pair the first screw rod, and another end face of described locking member does not protrude from described screwed hole.
Cavity body filter provided by the invention, by the tuning screw device that comprises tuning screw and locking member is set on cover plate or cavity, it is better that the lock of locking member is paid effect, and tuning screw is not easy to become flexible; And tuning screw device, lower than cavity fitting surface, has been saved cover plate or space more than cavity; The tuning range of tuning screw is larger; The processing cost of tuning screw and locking member is lower, and efficiency of assembling is higher, and reusable.
Screw device provided by the invention, the locking member of paying the first screw rod by lock is set in screwed hole is realized the fastening function of the first screw rod, it is better that lock is paid effect, be not easy to become flexible, and screw device can be paid below workpiece face at lock, the space outerpace of having saved lock pair workpiece, its first screw rod and locking member processing are simpler, reusable.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that the lock of a kind of tuning screw of the prior art is paid structure;
Fig. 2 is the profile of a kind of screw device in the embodiment of the present invention;
Fig. 3 is the generalized section of a kind of device of screw device in the embodiment of the present invention;
Fig. 4 is the structural representation of a kind of device of screw device in the embodiment of the present invention;
Fig. 5 is the profile of a kind of cavity body filter in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-,
As shown in Figure 2, the present embodiment provides a kind of screw device 100, comprise the first screw rod 10 and pay the locking member 20 of the first screw rod 10 for locking, described the first screw rod 10 is all bolted in screwed hole 30 with described locking member 20, one end of described locking member 20 is docked with one end of described the first screw rod 10 and is produced pretightning force lock pair the first screw rod 10, and another end face of described locking member 20 does not protrude from described screwed hole 30.
Concrete, with reference to figure 3 and Fig. 4, locking member 20 is preferably the ring bodies with external screw thread 21, and ring bodies is for making when mounted outside workpiece pass to locate the first screw rod.On the end face of one end of locking member, be provided with the breach 22 for locking member being screwed in to screwed hole, breach can be preferably two symmetrical breach, can certainly be equally distributed three or four breach, and the number of breach becomes limitation of the present invention not.Locking member can certainly be the solid body of rod, but ring bodies is lower than solid hopkinson bar body cost of manufacture, and outside workpiece can, through the centre bore of this ring bodies to locate the first screw rod, prevent the shift in position of the first screw rod in the time of assembling.
The first screw rod 10 is the body of rod of at least a portion with external screw thread 12, on the end face of one end of the first screw rod 10, be also provided with the groove 11 of locating the first screw rod for outside workpiece, the effect of groove 11 also comprises with outside workpiece the first screw rod screw-in screwed hole, groove 11 can be flat recess, cross recess, interior hex slot, rice word groove etc., and the shape of groove is not construed as limiting the invention.
The first screw rod 10 is identical with the external diameter of locking member 20, and locking member 20 is identical with the thread density of the first screw rod 10.
The first screw rod in the present embodiment and locking member can be screwed onto in self-clinching nut, also can directly be screwed onto in the screwed hole of workpiece.
In the present embodiment, first the first screw rod 10 is screwed in to the correct position in screwed hole 30, the first screw rod 10 has a part and screwed hole 30 threaded engagement at least, again locking member 20 is screwed in to screwed hole 30, outside workpiece is through the hollow-core construction of locking member, and be combined to locate the first screw rod 10 with the groove of first screw rod one end, with outside workpiece, locking member 20 is threaded to the first screw rod 10 and docks and screw again, the common lock of the first screw rod and locking member is paid in same section of screwed hole, so just can make the first screw rod 10 and locking member 20 be subject to contrary pretightning force, thereby locking the first screw rod.
Compared with prior art, screw device in the embodiment of the present invention can be realized the function at screwed hole internal locking screw rod, screw device is positioned at screwed hole, the workpiece lock that is specially adapted to screw rod is paid the more level and smooth requirement of face, screw rod of the prior art need be with nut check on workpiece, screw rod can stretch out outside workpiece, and screw device in the present embodiment is positioned at screwed hole, can realize the requirement that workpiece face is level and smooth.Because screw device and the screwed hole of the present embodiment are spirally connected, dismantle more convenient, and dismounting after still can repeatedly use.
Embodiment bis-,
The present embodiment provides a kind of cavity body filter 200, with reference to figure 5, comprise the cavity 210 of the sealing being formed by least one face, and be assemblied in the tuning screw device 100 at least one face, tuning screw device can be in the lump with reference to figure 2, Fig. 3 and Fig. 4, described tuning screw device 100 comprises the tuning screw 10 that is threaded with cavity 210 at least partly and for locking the locking member 20 of pair described tuning screw, described tuning screw 10 is all bolted in the screwed hole 30 on described cavity with described locking member 20, one end of described locking member 20 is docked with one end of described tuning screw 10 and is produced pretightning force lock pair tuning screw 10, the other end of described locking member 20 does not protrude from described screwed hole 30.
Tuning screw device 100 on installation cavity 210 is for regulating the radio frequency parameter of filter cavity, and the degree of depth of going deep in cavity by the tuning screw regulating in tuning screw device changes radio frequency parameter.
Concrete, tuning screw device Fig. 3 and Fig. 4 in can reference example one, locking member 20 is preferably the ring bodies with external screw thread 21, and ring bodies is for making when mounted outside workpiece through with location tuning screw.On the end face of one end of locking member, be provided with the breach 22 for locking member being screwed in to screwed hole, breach can be preferably two symmetrical breach, can certainly be equally distributed three or four breach, and the number of breach becomes limitation of the present invention not.Locking member can certainly be the solid body of rod, but ring bodies is lower than solid hopkinson bar body cost of manufacture, and outside workpiece can, through the centre bore of this ring bodies to locate the first screw rod, prevent the shift in position of tuning screw in the time of assembling.
Tuning screw 10 is the body of rod of at least a portion with external screw thread 12, on the end face of one end of tuning screw 10, be also provided with the groove 11 for outside workpiece location tuning screw, groove 11 can be flat recess, cross recess, interior hex slot, rice word groove etc., and the shape of groove is not construed as limiting the invention.
Tuning screw is identical with the external diameter of locking member, and locking member is identical with the thread density of tuning screw.
In the present embodiment, first tuning screw is screwed in to the correct position in screwed hole, tuning screw has a part and screwed hole threaded engagement at least, again locking member is screwed in to screwed hole, outside workpiece is through the hollow-core construction of locking member, and be combined with the groove of tuning screw one end with location tuning screw, with outside workpiece, locking member is threaded to tuning screw and docks and screw again, the common lock of tuning screw and locking member is paid in same section of screwed hole, so just can make tuning screw and locking member be subject to contrary pretightning force, thus locking tuning screw.
On cavity, can directly beat screwed hole, tuning screw and locking member are screwed onto in screwed hole jointly.But because the thickness of cavity is restricted, therefore be preferably crimping self-clinching nut on cavity, tuning screw and locking member are screwed onto in self-clinching nut, tuning screw has at least a part to be screwed onto in self-clinching nut again, and the tuning range of the tuning screw of this kind of mode is larger.
First the present invention is arranged on tuning screw in self-clinching nut, regulate tuning screw to make the transmission of cavity body filter signal reach optimum state, now, for the state that prevents tuning screw in cavity body filter use procedure changes, locking member need to be installed to be fixed on tuning screw in self-clinching nut, installing in the process of locking member as preventing that tuning screw state from changing, locking member is arranged to ring bodies, first using external tool to pass ring bodies fixes tuning screw, and then installation locking member, after fixing tuning screw, takes out again by locking member external tool, make tuning screw keep original state always, prevent that in installation process, tuning screw rotates, fixing due to locking member simultaneously, in use the position of tuning screw also can not change.
Compared with prior art, tuning screw device in the embodiment of the present invention can be realized the function at screwed hole internal locking tuning screw, make the surface of tuning screw device lower than cavity, can save space more than cavity, tuning screw of the prior art need be with nut check on cavity, tuning screw need stretch out outside locking face, and tuning screw device device in the present embodiment is positioned at screwed hole, can realize the requirement that locking face is level and smooth.Because tuning screw and locking member in the tuning screw device of the present embodiment are all bolted in screwed hole, dismantle more convenient, and dismounting after each parts still can repeatedly use, production efficiency is also higher.
Applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (11)
1. a cavity body filter, comprise the cavity of the sealing being formed by least one face, and be assemblied in the tuning screw device at least one face, it is characterized in that, described tuning screw device comprises the tuning screw that is threaded with cavity at least partly and for locking the locking member of pair described tuning screw, described tuning screw and described locking member are all bolted in the screwed hole on described cavity, one end of described locking member is docked with one end of described tuning screw and is produced pretightning force lock pair tuning screw, and the other end of described locking member does not protrude from described screwed hole.
2. cavity body filter according to claim 1, is characterized in that, described locking member is with externally threaded ring bodies, and described ring bodies is for making when mounted outside workpiece pass to locate described tuning screw.
3. cavity body filter according to claim 2, is characterized in that, is provided with the breach for locking member being screwed in to screwed hole on the end face of the other end of described locking member.
4. cavity body filter according to claim 3, is characterized in that, described breach is two symmetrical breach.
5. according to the cavity body filter described in claim 1 ~ 4 any one, it is characterized in that, on the end face of one end that described tuning screw docks with locking member, be provided with the groove of locating described tuning screw for outside workpiece.
6. according to the cavity body filter described in claim 1 ~ 4 any one, it is characterized in that, on described cavity, be crimped with self-clinching nut, described tuning screw and described locking member are all screwed onto in the screwed hole of self-clinching nut.
7. a screw device, it is characterized in that, comprise the first screw rod and lock the locking member of paying the first screw rod, described the first screw rod and described locking member are all bolted in screwed hole, one end of described locking member is docked with one end of described the first screw rod and is produced pretightning force lock pair the first screw rod, and another end face of described locking member does not protrude from described screwed hole.
8. screw device according to claim 7, is characterized in that, is with externally threaded ring bodies on described locking member, and described ring bodies is for making when mounted outside workpiece pass to locate described the first screw rod.
9. screw device according to claim 8, is characterized in that, is provided with the breach for locking member being screwed in to screwed hole on the end face of the other end of described locking member.
10. screw device according to claim 9, is characterized in that, described breach is two symmetrical breach.
Screw device described in 11. according to Claim 8 ~ 10 any one, is characterized in that, on the end face of one end that described the first screw rod docks with locking member, is provided with the groove of locating described the first screw rod for outside workpiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438961.1A CN103811836B (en) | 2012-11-07 | 2012-11-07 | A kind of cavity body filter and screw device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210438961.1A CN103811836B (en) | 2012-11-07 | 2012-11-07 | A kind of cavity body filter and screw device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103811836A true CN103811836A (en) | 2014-05-21 |
| CN103811836B CN103811836B (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210438961.1A Active CN103811836B (en) | 2012-11-07 | 2012-11-07 | A kind of cavity body filter and screw device |
Country Status (1)
| Country | Link |
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| CN (1) | CN103811836B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016165384A1 (en) * | 2015-09-23 | 2016-10-20 | 中兴通讯股份有限公司 | Resonator and cavity filter |
| WO2018133298A1 (en) * | 2017-01-18 | 2018-07-26 | 华讯方舟科技有限公司 | Frequency modulation device for microwave frequency converter and frequency modulation method therefor |
| CN110439903A (en) * | 2019-09-02 | 2019-11-12 | 浙江荣亿精密机械股份有限公司 | A kind of expansion chuck tuning Self-locking screw |
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| WO2016165384A1 (en) * | 2015-09-23 | 2016-10-20 | 中兴通讯股份有限公司 | Resonator and cavity filter |
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| CN110439903A (en) * | 2019-09-02 | 2019-11-12 | 浙江荣亿精密机械股份有限公司 | A kind of expansion chuck tuning Self-locking screw |
| CN110439903B (en) * | 2019-09-02 | 2021-07-02 | 浙江荣亿精密机械股份有限公司 | Expansion type tuning self-locking screw |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103811836B (en) | 2019-03-01 |
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Address after: 233000 building 4, national financial incubation Industrial Park, 17 Yannan Road, high tech Zone, Bengbu City, Anhui Province Patentee after: Dafu Technology (Anhui) Co., Ltd Address before: 518104, Guangdong, Shenzhen province Baoan District manhole street, oyster Road, manhole Industrial Company Third Industrial Zone, A1, A2, A3 101, A4 first, second, third layers Patentee before: SHENZHEN TATFOOK TECHNOLOGY Co.,Ltd. |
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