CN113410598B

CN113410598B - Novel adjustable filter

Info

Publication number: CN113410598B
Application number: CN202110957913.2A
Authority: CN
Inventors: 黄国利; 张家军; 张军辉
Original assignee: Nanjing Huamai Technology Co Ltd
Current assignee: Nanjing Huamai Technology Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2021-11-05
Anticipated expiration: 2041-08-20
Also published as: CN113410598A

Abstract

The invention belongs to the technical field of electronic communication equipment, in particular to a novel adjustable filter, which comprises a waveguide body, an adjusting component and a transmission component, wherein the waveguide body is provided with a waveguide body; according to the invention, the connecting piece and the adjusting plate are arranged, the T-shaped structure of the connecting piece and the mounting grooves formed in the opposite sides of the two connecting pieces are utilized, the metal plate is positioned in the middle of the connecting piece, the position of the metal plate is fixed, the adjusting plates are arranged on the two sides of the metal plate, the worm wheels in the rotating grooves on the two sides of the metal plate are driven to transmit by utilizing the rotation of the worm, the adjusting plates synchronously rotate, the angles of the adjusting plates are changed, the adjustment is effectively carried out on the two sides of the waveguide cavity, the tuning range is enlarged, the worm and worm gear transmission is stable, the vibration sense is low, the adjusting plates are effectively stable in rotation, the adjusting errors are effectively reduced, and the worm and worm gear transmission has self-locking property, so that the influence of vibration on the internal adjusting member is reduced.

Description

Novel adjustable filter

Technical Field

The invention belongs to the technical field of electronic communication equipment, and particularly relates to a novel adjustable filter.

Background

Along with the development of wireless communication, the demand on the microwave filter is gradually increased, different filter structures appear to meet different application environments, the tunable cavity filter has the characteristics of low insertion loss of a pass band, high rejection band rejection, convenient tuning and higher power bearing and is widely applied in a communication system, the E-plane filter can cancel frequency modulation and tuning coupling screws through the precision control of a diaphragm to realize the debugging-free of the filter and be beneficial to realizing the tunable structure of the microwave high-frequency filter, a dielectric sheet in the structure of the E-plane filter in the prior art is of an integral sheet structure, the dielectric sheet crosses a resonant cavity in a rectangular waveguide pipe of the filter, the dielectric constant requirement of the dielectric sheet is very low, the dielectric sheet has very small thickness and is difficult to process, the process reliability is poor, and the hardness of the dielectric sheet is weaker, the tuning mechanism is assembled in an E-plane filter, the anti-vibration capability is poor, the vibration of the E-plane filter is easy to cause the change of the position of a medium sheet, so that the performance of the E-plane filter is influenced, the frequency and the performance of the E-plane filter are unstable, and meanwhile, a diaphragm type structure is adopted by a partition wall between the split resonant cavities of the filter, so that the tuning mechanism can be adjusted in only half of the cavity, and the tuning range is limited.

An adjustable filter and adjustable filtering equipment that china patent issued, application number: CN2016800918970, comprising: the filter comprises a cavity, a filter element, a driving mechanism, at least one first adjustable element and at least one second adjustable element, wherein the filter element is arranged in the cavity, and the first surface of the filter element is provided with at least one through hole; one end of a first adjustable element is arranged opposite to one through hole in the at least one through hole; one end of a second adjustable element is arranged opposite to the position between two adjacent through holes in the at least one through hole; the drive mechanism controls the at least one first adjustable element to move synchronously and the at least one second adjustable element to move synchronously, but the frequency of the scheme is adjusted only on one side of the cavity, resulting in a smaller tuning range.

In view of the above, the present invention provides a novel tunable filter to solve the above technical problems.

Disclosure of Invention

In order to make up for the defects of the prior art, solve the problems that the vibration resistance is poor due to the weak hardness of a dielectric sheet when the dielectric sheet is assembled in an E-plane filter, the vibration of the E-plane filter is easy to cause the change of the position of the dielectric sheet, thereby affecting the performance of the E-plane filter, and causing the instability of the frequency and the performance of the E-plane filter, and meanwhile, a diaphragm type structure is adopted by a partition wall between the divided resonant cavities of the filter, so that a tuning mechanism can be adjusted only in a half cavity, and the tuning range is limited, the invention provides a novel adjustable filter.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a novel adjustable filter, which comprises a waveguide body, an adjusting component and a transmission component;

the waveguide body is a rectangular structural body; a waveguide cavity is formed in the waveguide body; the waveguide cavity is in a C-shaped design, and two ends of the waveguide cavity are both positioned at an opening at the upper end of the waveguide body; the middle part of the waveguide body is provided with a through groove; the through groove is communicated with the waveguide cavity; the through groove divides the waveguide body into a left part and a right part; one side of the waveguide body, which is parallel to the through groove, is provided with a fixing hole; fastening bolts are connected in the fixing holes in a threaded manner; the fastening bolt is used for fixedly connecting the two parts of the waveguide body;

the adjusting member comprises a metal plate, a connecting piece and an adjusting plate; the metal plate is made of metal sheet materials; the metal plate is provided with uniformly distributed filtering holes; connecting holes are formed in the two ends of the metal plate; the metal plate and the connecting piece are both arranged in the through groove; the connecting hole on the metal plate is superposed with the fixing hole on the waveguide body, so that the waveguide body and the metal plate can be fixedly connected by a fastening bolt; the connecting pieces are symmetrically arranged at the upper end and the lower end of the metal plate; the connecting pieces are T-shaped structures, and the T-shaped maximum ends of the two connecting pieces are close to each other; one side of the connecting piece, which is close to the metal plate, is provided with a mounting groove; the metal plate is connected in the mounting groove in a sliding manner; the connecting piece is provided with positioning holes which are uniformly distributed; the waveguide body is fixedly connected with positioning rods which are uniformly distributed in the through groove; the positioning rods correspond to the positioning holes one by one; the connecting piece is fixedly arranged in the through groove through the positioning hole and the positioning rod; two symmetrically installed connecting pieces are provided with rotating grooves which are uniformly distributed on the sides close to each other; the rotary grooves on the same connecting piece are symmetrically distributed on two sides of the mounting groove; the rotating grooves on the two symmetrically-installed connecting pieces are in one-to-one correspondence and are jointly and rotatably connected with a rotating shaft; the adjusting plates are sleeved on the rotating shaft; the length of the adjusting plate is equal to the distance between two adjacent filtering holes, and the height of the adjusting plate is equal to the distance between two adjacent surfaces of the connecting piece; in the initial state, a plurality of adjusting plates are adjacently arranged at two sides of the metal plate end to end;

the transmission component comprises a stepping motor, a transmission gear set, a worm and a turbine; the stepping motor is fixedly connected to one side, perpendicular to the through groove, of the waveguide body through a screw; the length direction of each connecting piece is provided with a transmission groove; one end of the transmission groove, which is close to the stepping motor, penetrates through the waveguide body; the worm is rotationally connected in the transmission groove; the rotating shafts are positioned in the rotating grooves and are sleeved with turbines; the transmission groove is provided with a first through groove corresponding to the rotating groove; the turbine extends into the transmission groove through the first through groove; the worm extends to the outside through the transmission groove; one end of the worm positioned outside is sleeved with a transmission gear set together with the output end of the stepping motor; the stepping motor and the worm are driven by a transmission gear set;

along with the development of wireless communication, the demand on the microwave filter is gradually increased, different filter structures appear to meet different application environments, the tunable cavity filter has the characteristics of low insertion loss of a pass band, high rejection band rejection, convenient tuning and higher power bearing and is widely applied in a communication system, the E-plane filter can cancel frequency modulation and tuning coupling screws through the precision control of a diaphragm to realize the debugging-free of the filter and be beneficial to realizing the tunable structure of the microwave high-frequency filter, a dielectric sheet in the structure of the E-plane filter in the prior art is of an integral sheet structure, the dielectric sheet crosses a resonant cavity in a rectangular waveguide pipe of the filter, the dielectric constant requirement of the dielectric sheet is very low, the dielectric sheet has very small thickness and is difficult to process, the process reliability is poor, and the hardness of the dielectric sheet is weaker, the tuning mechanism is assembled in an E-plane filter, the anti-vibration capability is poor, the vibration of the E-plane filter is easy to cause the change of the position of a medium slice, so that the performance of the E-plane filter is influenced, the frequency and the performance of the E-plane filter are unstable, and meanwhile, a diaphragm type structure is adopted by a partition wall between the divided resonant cavities of the filter, so that the tuning mechanism can be adjusted in only half of the cavity, and the tuning range is limited;

when the adjustable filter works, the waveguide, the adjusting member and the transmission member are arranged, when the adjustable filter is assembled, the left side and the right side of the waveguide are separated, the metal plate is inserted into the mounting groove formed on the opposite surface of the two connecting plates which are mutually connected, then the metal plate and the connecting plates are placed in the through groove formed on the waveguide, the connecting hole on the metal plate is aligned with the fixing hole on the waveguide, the positioning hole on the connecting piece and the positioning rod on the waveguide, so that the waveguide on the left part and the right part are aligned with the metal plate and the connecting plates, then the left side and the right side of the waveguide are tightened and fixedly connected through the fastening bolt in the fixing groove, so that the waveguide is fixedly connected with the metal plate and the connecting plates, the worm extends to the outer side of the waveguide through the transmission groove in the closing process, and the installation of the adjustable filter is completed after the stepping motor and the transmission gear set are installed, when the central frequency is adjusted, the step motor is controlled to rotate by outputting signals to the step motor, so that the step motor drives the worm to rotate through the transmission gear set, when the worm rotates in the transmission groove, the worm wheel connected with the worm through the first through groove rotates in the rotation groove, so that the rotation shaft rotates and drives the adjusting plates positioned on two sides of the metal plate to rotate, the angles and the overlapping areas of the adjusting plates and the filtering holes on the metal plate are changed, the microwave central frequency in the waveguide cavity is changed, the connecting piece and the adjusting plate are arranged, the T-shaped structure of the connecting piece and the mounting grooves formed on one side opposite to the two connecting pieces are utilized, so that the metal plate is positioned in the middle of the connecting piece, the position of the metal plate is fixed, the adjusting plates are arranged on two sides of the metal plate, and the worm rotates to drive the worm wheels in the rotation grooves on two sides of the metal plate to perform transmission, and then make the regulating plate synchronous rotation, make the regulating plate angle change, and then effectual all adjusts in waveguide chamber both sides, the harmonious scope has been increased, the transmission of vortex worm gear is comparatively stable simultaneously, the sense of shaking is lower, and then the effectual regulating plate that makes is comparatively stable when rotating, effectual reduction regulating error, and the transmission of turbine worm possesses the auto-lock nature, when the worm is fixed, can effectually avoid because of the vibration of waveguide body, thereby lead to the regulating plate to transfer the turbine and rotate, and then reduce the influence of vibration to the internal adjusting member.

Preferably, the waveguide cavity is provided with symmetrically designed first chutes at two sides of the connecting piece; the moving rods are arranged on the left side and the right side of the waveguide cavity on the connecting piece; the movable rods extend into the first sliding groove and are connected with the first sliding groove in a sliding mode; the upper and lower moving rods positioned on the same side of the metal plate are symmetrically designed and are fixedly connected with each other through a metal sheet; the shape of the metal sheet is consistent with that of the filtering hole; the metal sheets correspond to the filtering holes one by one;

the during operation, through setting up carriage release lever and sheetmetal, along with the regulating plate angle crescent when going through center frequency regulation, and then make regulating plate and filtering hole break away from completely, the rotation of regulating plate promotes the carriage release lever this moment, and then make the carriage release lever drive the sheetmetal to keeping away from filtering hole one side and remove, and then the spacing of sheetmetal and filtering hole that the interval linked firmly on the carriage release lever through the symmetry is adjusted the center frequency in the waveguide intracavity, regulating plate and filtering hole at this moment break away from completely simultaneously, can play the microwave frequency range to the waveguide intracavity and carry out the effect of adjusting.

Preferably, one side of the moving rod, which is close to the adjusting plate, is fixedly connected with a blocking rod; the stop lever is T-shaped, and the T-shaped maximum end of the baffle is designed to face the adjusting plate; one end of the moving rod, which is positioned in the first sliding groove, is elastically connected with one end of the first sliding groove, which is far away from the connecting piece, through a spring;

during operation, through setting up the shelves pole, utilize the shelves pole to make and have fixed interval between regulating plate and the sheetmetal, and then make the regulating plate rotate the in-process of adjusting and have fixed interval with the sheetmetal all the time, the transmission of the microwave of being convenient for, the effectual band width to the microwave of fixed interval plays the restriction effect simultaneously, and then makes the waveguide intracavity microwave bandwidth not take place great change because of the change of central frequency.

Preferably, the transmission gear set comprises a first bevel gear, a second bevel gear and a transmission wheel; the first bevel gear is sleeved on an output shaft of the stepping motor; one end of the wave guide body, which is provided with the stepping motor, is fixedly connected with a transmission rod; the second bevel gear is rotationally connected to one end, far away from the waveguide body, of the transmission rod; the first bevel gear is meshed with the second bevel gear; the transmission wheels are sleeved at one end of the worm positioned outside the transmission groove; the transmission ratio of the second bevel gear to the transmission wheel is 3-4: 1;

when the adjusting plate works, the first bevel gear, the second bevel gear and the driving wheel are arranged, the rotating direction of the stepping motor is changed by utilizing the first bevel gear and the second bevel gear, and the transmission ratio of the second bevel gear and the driving wheel is limited, so that the transmission efficiency between the stepping motor and the worm is reduced, the rotating precision of the adjusting plate is increased after the worm is driven, and the generation of adjusting errors is effectively reduced.

Preferably, a T-shaped groove is formed at the junction of the waveguide body and the transmission rod; the transmission rod is connected in the T-shaped groove in a sliding mode, and the transmission rod is arranged at one end, located in the T-shaped groove, of the T-shaped groove and is designed in a T shape; one end of the transmission rod, which is positioned in the T-shaped groove, is elastically connected with the T-shaped groove through a spring; the transmission rod is fixedly connected with a locking plate; the locking plate extends to one side of the driving wheel close to the waveguide body; the locking plate and the driving wheel are designed to be rough on the sides close to each other; the wave guide body is fixedly connected with a mounting plate; the mounting plate is provided with a second sliding chute; the stepping motor is elastically connected in the second sliding groove through a spring; one side of the second sliding chute, which is close to the first bevel gear, is fixedly connected with a toothed plate; in an initial state, the toothed plate is meshed with the first bevel gear, and the second bevel gear is separated from the driving wheel;

when the device works, by arranging the locking plate and the mounting plate, when adjustment is carried out, the stepping motor receives signals, so that the output shaft rotates, the rotating output shaft drives the first bevel gear to rotate, the stepping motor is driven to extrude the spring in the second chute through the meshing between the first bevel gear and the toothed plate to move, the first bevel gear continuously moves relative to the toothed plate, so that the first bevel gear drives the second bevel gear to extrude the second bevel gear at the same time of driving the second bevel gear, the second bevel gear drives the transmission rod to slide in the T-shaped groove, the locking plate on the transmission rod is separated from the transmission wheel, the second bevel gear is meshed with the transmission wheel, so that the stepping motor and the worm are driven to transmit, and after the adjustment is finished, the transmission rod and the stepping motor both slide and reset under the action of the spring, so that the locking plate is contacted with the transmission wheel again, under the elastic force effect of spring and the frictional force effect of lockplate and driving wheel contact surface, make the lockplate fix the driving wheel, and then make the worm fixed, the auto-lock nature of the fixed worm reinforcing turbine of effectual utilization, and then the stability that makes the regulating plate is stronger, the error that causes when effectual reduction adjustable filter receives external force to produce the vibration.

Preferably, the transmission rod is positioned in the T-shaped groove and is fixedly connected with a slow release bag; the slow release capsule is used for air inlet and air outlet through the one-way conduit, and the air inlet rate of the slow release capsule is greater than the air outlet rate;

during operation, through setting up the slowly-releasing bag, the speed that makes the transfer line reset under the spring action is less than the speed that step motor resets, and then makes first bevel gear and second bevel gear break away from at the in-process that resets, and then the effectual first bevel gear of avoiding receives the rotation transmission that the pinion rack effect produced to transfer to the transfer wheel department at the in-process that resets, and then avoids producing the influence to the angle of worm, produces the unnecessary error.

The invention has the following beneficial effects:

1. the novel adjustable filter is characterized in that a connecting piece and an adjusting plate are arranged, a T-shaped structure of the connecting piece and mounting grooves formed in opposite sides of the two connecting pieces are utilized, the metal plate is positioned in the middle of the connecting piece and is fixed, the adjusting plates are mounted on two sides of the metal plate, turbines in rotating grooves on two sides of the metal plate are driven to transmit by rotation of a worm, the adjusting plate is driven to rotate synchronously, the angle of the adjusting plate is changed, adjustment is effectively performed on two sides of a waveguide cavity, the tuning range is enlarged, the worm gear and worm transmission is stable, the vibration sense is low, the adjusting plate is stable when rotating, the adjusting error is effectively reduced, the worm gear and worm transmission has self-locking property, when the worm is fixed, vibration of a waveguide body can be effectively avoided, and the adjusting plate is driven to rotate the turbines, thereby reducing the effect of vibration on the internal adjustment member.

2. According to the novel adjustable filter, the first bevel gear, the second bevel gear and the transmission wheel are arranged, the rotation direction of the stepping motor is changed by utilizing the first bevel gear and the second bevel gear, the transmission ratio of the second bevel gear to the transmission wheel is limited, the transmission efficiency between the stepping motor and the worm is reduced, the precision of the worm driving the adjusting plate to rotate after transmission is increased, and the generation of an adjusting error is effectively reduced.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a front view of the present invention;

FIG. 2 is a partial configuration diagram of the present invention;

FIG. 3 is an exploded view of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

in the figure: the waveguide device comprises a waveguide body 1, a waveguide cavity 11, a through groove 12, a fixing hole 13, a fastening bolt 14, a metal plate 2, a filtering hole 21, a connecting hole 22, a connecting piece 3, a mounting groove 31, a positioning hole 32, a positioning rod 33, a rotating groove 34, a rotating shaft 35, an adjusting plate 36, a stepping motor 4, a transmission groove 41, a worm 42, a first through groove 43, a turbine 44, a first sliding groove 5, a moving rod 51, a metal sheet 52, a stop rod 53, a first bevel gear 6, a second bevel gear 61, a transmission wheel 62, a transmission rod 63, a T-shaped groove 7, a locking plate 71, a mounting plate 72, a second sliding groove 73, a toothed plate 74 and a slow release capsule 75.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 4, the novel tunable filter of the present invention includes a waveguide 1, a tuning member and a transmission member;

the waveguide 1 is a rectangular structure; a waveguide cavity 11 is formed in the waveguide body 1; the waveguide cavity 11 is in a C-shaped design, and two ends of the waveguide cavity 11 are both positioned at an opening at the upper end of the waveguide body 1; the middle part of the waveguide body 1 is provided with a through groove 12; the through groove 12 is communicated with the waveguide cavity 11; the through groove 12 divides the waveguide body 1 into a left part and a right part; a fixing hole 13 is formed in one side of the waveguide body 1 parallel to the through groove 12; fastening bolts 14 are connected in the fixing holes 13 in a threaded manner; the fastening bolt 14 is used for fixedly connecting two parts of the waveguide body 1;

the adjusting member includes a metal plate 2, a connecting member 3, and an adjusting plate 36; the metal plate 2 is made of metal sheet material; the metal plate 2 is provided with uniformly distributed filtering holes 21; connecting holes 22 are formed in two ends of the metal plate 2; the metal plate 2 and the connecting piece 3 are both arranged in the through groove 12; the connecting hole 22 on the metal plate 2 is superposed with the fixing hole 13 on the waveguide 1, so that the fastening bolt 14 can be used for fixedly connecting the waveguide 1 and the metal plate 2 conveniently; the connecting pieces 3 are symmetrically arranged at the upper end and the lower end of the metal plate 2; the connecting pieces 3 are T-shaped structures, and the T-shaped maximum ends of the two connecting pieces 3 are close to each other; one side of the connecting piece 3, which is close to the metal plate 2, is provided with an installation groove 31; the metal plate 2 is connected in the mounting groove 31 in a sliding manner; the connecting piece 3 is provided with positioning holes 32 which are uniformly distributed; the waveguide body 1 is fixedly connected with positioning rods 33 which are uniformly distributed in the through groove 12; the positioning rods 33 correspond to the positioning holes 32 one by one; the connecting piece 3 is fixedly arranged in the through groove 12 through a positioning hole 32 and a positioning rod 33; two symmetrically-installed connecting pieces 3 are provided with uniformly-distributed rotating grooves 34 at the sides close to each other; the rotating grooves 34 on the same connecting piece 3 are symmetrically distributed on two sides of the mounting groove 31; the rotating grooves 34 on the two symmetrically-arranged connecting pieces 3 are in one-to-one correspondence and are connected with rotating shafts 35 in a rotating mode; the adjusting plates 36 are sleeved on the rotating shaft 35; the length of the adjusting plate 36 is equal to the distance between two adjacent filtering holes 21, and the height of the adjusting plate 36 is equal to the distance between two adjacent surfaces of the connecting piece 3; in the initial state, a plurality of adjusting plates 36 are adjacently arranged at two sides of the metal plate 2 end to end;

the transmission component comprises a stepping motor 4, a transmission gear set, a worm 42 and a worm wheel 44; the stepping motor 4 is fixedly connected to one side of the waveguide body 1, which is vertical to the through groove 12, through a screw; the connecting pieces 3 are provided with transmission grooves 41 in the length direction; one end of the transmission groove 41 close to the stepping motor 4 penetrates through the waveguide body 1; the worm 42 is rotatably connected in the transmission groove 41; the rotating shafts 35 are positioned in the rotating grooves 34 and are sleeved with turbines 44; the transmission groove 41 is provided with a first through groove 43 corresponding to the rotation groove 34; the turbine 44 extends into the transmission groove 41 through the first through groove 43; the worm 42 extends to the outside through the transmission groove 41; one end of the worm 42 positioned outside is sleeved with a transmission gear set together with the output end of the stepping motor 4; the stepping motor 4 and the worm 42 are driven by a transmission gear set;

when the waveguide 1, the adjusting member and the transmission member are arranged, during assembly, the left side and the right side of the waveguide 1 are separated, the metal plate 2 is inserted into the mounting groove 31 formed in the opposite surface of the two mutually connected connecting plates, then the metal plate 2 and the connecting plates are placed in the through groove 12 formed in the waveguide 1, the connecting hole 22 in the metal plate 2 is aligned with the fixing hole 13 in the waveguide 1, the positioning hole 32 in the connecting piece 3 is aligned with the positioning rod 33 on the waveguide 1, so that the waveguide 1, the metal plate 2 and the connecting plates in the left part and the right part are aligned, then the left side and the right side of the waveguide 1 are tightened and fixedly connected through the fastening bolt 14 in the fixing groove, so that the waveguide 1, the metal plate 2 and the connecting plates are fixedly connected, the worm 42 extends to the outer side of the waveguide 1 through the transmission groove 41 in the closing process, the stepping motor 4, When the center frequency is adjusted, the step motor 4 is controlled to rotate by outputting a signal to the step motor 4, so that the step motor 4 drives the worm 42 to rotate through the transmission gear set, when the worm 42 rotates in the transmission groove 41, the worm wheel 44 connected with the worm 42 through the first through groove 43 rotates in the rotation groove 34, so that the rotation shaft 35 rotates, and the adjusting plates 36 positioned at two sides of the metal plate 2 are driven to rotate, so that the angles and the overlapping areas of the adjusting plates 36 and the filtering holes 21 on the metal plate 2 are changed, so that the center frequency of microwaves in the waveguide cavity 11 is changed, and by arranging the connecting piece 3 and the adjusting plates 36, the connecting piece 3 is in a T-shaped structure, and the mounting grooves 31 formed at the opposite sides of the two connecting pieces 3 are utilized, so that the metal plate 2 is positioned in the middle of the connecting piece 3, carry out the rigidity to metal sheet 2, and in metal sheet 2 both sides installation regulating plate 36, utilize the rotation of worm 42 to drive the turbine 44 in the rotation groove 34 of metal sheet 2 both sides and transmit, and then make regulating plate 36 rotate in step, make regulating plate 36 angle change, and then effectual all adjust at waveguide chamber 11 both sides, the tuned scope has been increased, simultaneously worm gear 42 transmission is comparatively stable, the vibration sense is lower, and then effectual regulating plate 36 is comparatively stable when rotating, effectual reduction regulating error, and the transmission of worm gear 44 worm 42 possesses the auto-lock nature, when worm 42 is fixed, can effectually avoid the vibration because of waveguide 1, thereby lead to regulating plate 36 to transfer the turbine 44 and rotate, and then reduce the influence of vibration to internal adjusting member.

As an embodiment of the present invention, the waveguide cavity 11 is provided with first sliding chutes 5 symmetrically designed on both sides of the connecting member 3; the moving rods 51 are arranged on the left side and the right side of the waveguide cavity 11 on the connecting piece 3; the movable rods 51 extend into the first sliding chute 5 and are connected with the first sliding chute 5 in a sliding manner; the upper and lower moving rods 51 positioned on the same side of the metal plate 2 are symmetrically designed, and the two moving rods 51 are fixedly connected with each other through a metal sheet 52; the shape of the metal sheet 52 is consistent with that of the filter hole 21; the metal sheets 52 correspond to the filtering holes 21 one by one;

during operation, through setting up carriage release lever 51 and sheetmetal 52, along with the regulation plate 36 angle crescent when carrying out center frequency regulation, and then make regulation plate 36 and filtering hole 21 break away from completely, the rotation of regulation plate 36 promotes carriage release lever 51 this moment, and then make carriage release lever 51 drive sheetmetal 52 to keeping away from filtering hole 21 one side and remove, and then spacing through sheetmetal 52 that the interval linked firmly on the carriage release lever 51 of symmetry and filtering hole 21 adjust the center frequency in the waveguide chamber 11, regulation plate 36 and filtering hole 21 at this moment break away from completely simultaneously, can play the effect of adjusting the microwave frequency range in the waveguide chamber 11.

As an embodiment of the present invention, a stop lever 53 is fixedly connected to one side of the moving rod 51 close to the adjusting plate 36; the stop lever 53 is T-shaped, and the maximum T-shaped end of the baffle is designed to face the adjusting plate 36; one end of the moving rod 51, which is positioned in the first sliding chute 5, is elastically connected with one end of the first sliding chute 5, which is far away from the connecting piece 3, through a spring;

during operation, through setting up shelves pole 53, utilize the shelves pole to make and have fixed interval between regulating plate 36 and the sheetmetal 52, and then make regulating plate 36 have fixed interval with the sheetmetal 52 all the time at the in-process of rotation regulation, the transmission of the microwave of being convenient for, the effectual band width to the microwave that plays the restriction effect of fixed interval simultaneously, and then makes the microwave bandwidth in waveguide cavity 11 not take place great change because of the change of central frequency.

As an embodiment of the present invention, the transmission gear set includes a first bevel gear 6, a second bevel gear 61, and a transmission wheel 62; the first bevel gear 6 is sleeved on an output shaft of the stepping motor 4; one end of the waveguide body 1, which is provided with the stepping motor 4, is fixedly connected with a transmission rod 63; the second bevel gear 61 is rotatably connected to one end of the transmission rod 63, which is far away from the waveguide body 1; the first bevel gear 6 is meshed with the second bevel gear 61; the driving wheels 62 are sleeved at one end of the worm 42 positioned outside the driving groove 41; the transmission ratio of the second bevel gear 61 to the transmission wheel 62 is 3-4: 1;

when the adjusting plate works, the first bevel gear 6, the second bevel gear 61 and the transmission wheel 62 are arranged, the rotating direction of the stepping motor 4 is changed by utilizing the first bevel gear 6 and the second bevel gear 61, the transmission ratio of the second bevel gear 61 and the transmission wheel 62 is limited, the transmission efficiency between the stepping motor 4 and the worm 42 is reduced, the precision of the worm 42 driving the adjusting plate 36 to rotate after transmission is increased, and the generation of an adjusting error is effectively reduced.

As an embodiment of the present invention, a T-shaped groove 7 is formed at the junction of the waveguide 1 and the transmission rod 63; the transmission rod 63 is connected in the T-shaped groove 7 in a sliding mode, and one end, located in the T-shaped groove 7, of the transmission rod 63 is in a T-shaped design; one end of the transmission rod 63, which is positioned in the T-shaped groove 7, is elastically connected with the T-shaped groove 7 through a spring; the transmission rod 63 is fixedly connected with a locking plate 71; the locking plate 71 extends to one side of the transmission wheel 62 close to the waveguide 1; the locking plate 71 and the driving wheel 62 are designed to be rough on the sides close to each other; the waveguide body 1 is fixedly connected with a mounting plate 72; a second sliding groove 73 is formed in the mounting plate 72; the stepping motor 4 is elastically connected in the second sliding groove 73 through a spring; a toothed plate 74 is fixedly connected to one side of the second sliding groove 73, which is close to the first bevel gear 6; in the initial state, the toothed plate 74 is meshed with the first bevel gear 6, and the second bevel gear 61 is separated from the design of the transmission wheel 62;

during operation, by arranging the locking plate 71 and the mounting plate 72, during adjustment, the stepping motor 4 receives a signal, so that the output shaft rotates, the rotating output shaft drives the first bevel gear 6 to rotate, the stepping motor 4 is driven to extrude the spring in the second chute 73 through the engagement between the first bevel gear 6 and the toothed plate 74 to move, along with the continuous displacement of the first bevel gear 6 relative to the toothed plate 74, the first bevel gear 6 drives the second bevel gear 61 to extrude the second bevel gear 61 at the same time of driving the second bevel gear 61, the second bevel gear 61 drives the transmission rod 63 to slide in the T-shaped groove 7, the locking plate 71 on the transmission rod 63 is separated from the transmission wheel 62, the second bevel gear 61 is engaged with the transmission wheel 62, transmission is performed between the stepping motor 4 and the worm 42, and after adjustment is completed, the transmission rod 63 and the stepping motor 4 both slide under the action of the spring, Reset, and then make lockplate 71 contact with the drive wheel 62 again, under the elastic force effect of spring and the frictional force of lockplate 71 and drive wheel 62 contact surface, make lockplate 71 fix drive wheel 62, and then make worm 42 fixed, the auto-lock nature of worm wheel 44 is strengthened to effectual fixed worm 42 that utilizes, and then makes the stability of regulating plate 36 stronger, and the error that causes when effectual reduction adjustable filter receives external force to produce the vibration.

As an embodiment of the present invention, the transmission rod 63 is located in the T-shaped groove 7 and is further fixedly connected with a slow release bag 75; the slow release capsule 75 is used for air inlet and air outlet through a one-way conduit, and the air inlet rate of the slow release capsule 75 is greater than the air outlet rate;

during operation, the slow release capsule 75 is arranged, so that the reset rate of the transmission rod 63 under the action of the spring is smaller than the reset rate of the stepping motor 4, the first bevel gear 6 and the second bevel gear 61 are separated in the reset process, the rotation of the first bevel gear 6 under the action of the toothed plate 74 in the reset process is effectively prevented from being transmitted to the transmission wheel 62, and the influence on the angle of the worm 42 and the generation of unnecessary errors are avoided.

The specific implementation flow is as follows:

during operation, by arranging the waveguide 1, the adjusting member and the transmission member, during assembly, the left side and the right side of the waveguide 1 are separated, the metal plate 2 is inserted into the mounting groove 31 formed on the opposite surface of the two connecting plates which are connected with each other, then the metal plate 2 and the connecting plates are placed in the through groove 12 formed on the waveguide 1, the connecting hole 22 on the metal plate 2 is aligned with the fixing hole 13 on the waveguide 1, the positioning hole 32 on the connecting piece 3 is aligned with the positioning rod 33 on the waveguide 1, so that the waveguide 1 on the left side and the right side are aligned with the metal plate 2 and the connecting plates, then the left side and the right side of the waveguide 1 are tightened and fixedly connected through the fastening bolt 14 in the fixing groove, so that the waveguide 1 is fixedly connected with the metal plate 2 and the connecting plates, the worm 42 extends to the outer side of the waveguide 1 through the transmission groove 41 in the closing process, and the stepping motor 4 is arranged, The transmission gear set is installed to complete the installation of the adjustable filter, when the central frequency is adjusted, the step motor 4 is controlled to rotate by outputting signals to the step motor 4, so that the step motor 4 drives the worm 42 to rotate through the transmission gear set, when the worm 42 rotates in the transmission groove 41, the worm wheel 44 connected with the worm 42 through the first through groove 43 is caused to rotate in the rotation groove 34, so that the rotation shaft 35 rotates, and the adjusting plates 36 positioned on two sides of the metal plate 2 are driven to rotate, so that the angles and the superposition areas of the adjusting plates 36 and the filter holes 21 on the metal plate 2 are changed, and the microwave central frequency in the waveguide cavity 11 is changed.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A novel tunable filter is characterized in that: comprises a wave conductor (1), an adjusting component and a transmission component;

the waveguide (1) is a rectangular structure; a waveguide cavity (11) is formed in the waveguide body (1); the waveguide cavity (11) is in a C-shaped design, and two ends of the waveguide cavity (11) are both positioned at an opening at the upper end of the waveguide body (1); a through groove (12) is formed in the middle of the waveguide body (1); the through groove (12) is communicated with the waveguide cavity (11); the through groove (12) divides the waveguide body (1) into a left part and a right part; one side of the waveguide body (1) parallel to the through groove (12) is provided with a fixing hole (13); fastening bolts (14) are connected in the fixing holes (13) in a threaded manner; the fastening bolt (14) is used for fixedly connecting two parts of the waveguide body (1);

the adjusting component comprises a metal plate (2), a connecting piece (3) and an adjusting plate (36); the metal plate (2) is made of metal sheet materials; the metal plate (2) is provided with uniformly distributed filtering holes (21); connecting holes (22) are formed in both ends of the metal plate (2); the metal plate (2) and the connecting piece (3) are both arranged in the through groove (12); the connecting hole (22) on the metal plate (2) is superposed with the fixing hole (13) on the waveguide body (1), so that the fastening bolt (14) can be used for fixedly connecting the waveguide body (1) and the metal plate (2) conveniently; the connecting pieces (3) are symmetrically arranged at the upper end and the lower end of the metal plate (2); the connecting pieces (3) are T-shaped structures, and the T-shaped maximum ends of the two connecting pieces (3) are close to each other; one side of the connecting piece (3) close to the metal plate (2) is provided with a mounting groove (31); the metal plate (2) is connected in the mounting groove (31) in a sliding manner; positioning holes (32) are uniformly distributed on the connecting piece (3); the waveguide body (1) is fixedly connected with positioning rods (33) which are uniformly distributed in the through groove (12); the positioning rods (33) correspond to the positioning holes (32) one by one; the connecting piece (3) is fixedly arranged in the through groove (12) through a positioning hole (32) and a positioning rod (33); two sides, close to each other, of the two symmetrically-installed connecting pieces (3) are provided with rotating grooves (34) which are uniformly distributed; the rotating grooves (34) on the same connecting piece (3) are symmetrically distributed on two sides of the mounting groove (31); the rotating grooves (34) on the two symmetrically-installed connecting pieces (3) are in one-to-one correspondence and are jointly and rotatably connected with a rotating shaft (35); the adjusting plates (36) are sleeved on the rotating shaft (35); the length of the adjusting plate (36) is equal to the distance between two adjacent filtering holes (21), and the height of the adjusting plate (36) is equal to the distance between two adjacent surfaces of the connecting piece (3); in the initial state, a plurality of adjusting plates (36) are adjacently arranged at two sides of the metal plate (2) end to end;

the transmission component comprises a stepping motor (4), a transmission gear set, a worm (42) and a turbine (44); the stepping motor (4) is fixedly connected to one side, perpendicular to the through groove (12), of the waveguide body (1) through a screw; the length direction of the connecting piece (3) is provided with transmission grooves (41); one end of the transmission groove (41) close to the stepping motor (4) penetrates through the waveguide body (1); the worm (42) is rotationally connected in the transmission groove (41); the rotating shafts (35) are positioned in the rotating grooves (34) and are sleeved with turbines (44); the transmission groove (41) is provided with a first through groove (43) corresponding to the rotating groove (34); the turbine (44) extends into the transmission groove (41) through the first through groove (43); the worm (42) extends to the outside through a transmission groove (41); one end of the worm (42) positioned outside is sleeved with a transmission gear set together with the output end of the stepping motor (4); the stepping motor (4) and the worm (42) are driven through a transmission gear set.

2. The novel tunable filter of claim 1, wherein: the waveguide cavity (11) is positioned at two sides of the connecting piece (3) and is provided with first sliding chutes (5) which are symmetrically designed; the moving rods (51) are arranged on the left side and the right side of the waveguide cavity (11) on the connecting piece (3); the movable rods (51) extend into the first sliding grooves (5) and are connected with the first sliding grooves (5) in a sliding mode; the upper and lower moving rods (51) positioned on the same side of the metal plate (2) are symmetrically designed, and the two moving rods (51) are fixedly connected with each other through metal sheets (52); the shape of the metal sheet (52) is consistent with that of the filtering hole (21); the metal sheets (52) correspond to the filtering holes (21) one by one.

3. The novel tunable filter of claim 2, wherein: a blocking rod (53) is fixedly connected to one side of the moving rod (51) close to the adjusting plate (36); the stop lever (53) is T-shaped, and the T-shaped maximum end of the baffle is designed to face the adjusting plate (36); the movable rod (51) is positioned in the first sliding groove (5), and one end of the movable rod is elastically connected with one end, far away from the connecting piece (3), of the first sliding groove (5) through a spring.

4. The novel tunable filter of claim 1, wherein: the transmission gear set comprises a first bevel gear (6), a second bevel gear (61) and a transmission wheel (62); the first bevel gear (6) is sleeved on an output shaft of the stepping motor (4); one end of the waveguide body (1) provided with the stepping motor (4) is fixedly connected with a transmission rod (63); the second bevel gear (61) is rotationally connected to one end, far away from the waveguide body (1), of the transmission rod (63); the first bevel gear (6) is meshed with the second bevel gear (61); the transmission wheels (62) are sleeved at one end of the worm (42) positioned outside the transmission groove (41); the transmission ratio of the second bevel gear (61) to the transmission wheel (62) is 3-4: 1.

5. The novel tunable filter of claim 4, wherein: a T-shaped groove (7) is formed at the junction of the waveguide body (1) and the transmission rod (63); the transmission rod (63) is connected in the T-shaped groove (7) in a sliding mode, and the transmission rod (63) is arranged in the T-shaped groove (7) and is in a T-shaped design; one end of the transmission rod (63) positioned in the T-shaped groove (7) is elastically connected with the T-shaped groove (7) through a spring; a locking plate (71) is fixedly connected to the transmission rod (63); the locking plate (71) extends to one side of the transmission wheel (62) close to the waveguide body (1); the locking plate (71) and the driving wheel (62) are designed to be rough on the sides close to each other; the wave guide body (1) is fixedly connected with a mounting plate (72); a second sliding groove (73) is formed in the mounting plate (72); the stepping motor (4) is elastically connected into the second sliding groove (73) through a spring; a toothed plate (74) is fixedly connected to one side, close to the first bevel gear (6), of the second sliding groove (73); in the initial state, the toothed plate (74) is meshed with the first bevel gear (6), and the second bevel gear (61) is separated from the design of the transmission wheel (62).

6. The novel tunable filter of claim 5, wherein: the transmission rod (63) is positioned in the T-shaped groove (7) and is fixedly connected with a slow release capsule (75); the slow release capsule (75) is used for air inlet and air outlet through the one-way conduit, and the air inlet rate of the slow release capsule (75) is greater than the air outlet rate.