Waveguide filter with adjustable bandwidth

Abstract

The utility model belongs to the technical field of waveguide filters, and particularly relates to a bandwidth-adjustable waveguide filter, which comprises a cavity, an adjusting cavity is arranged on the inner side of the cavity, a tuning screw is arranged on the inner side of the adjusting cavity, a medium rod is arranged on one side of the adjusting cavity in a penetrating manner, an electric hydraulic cylinder is fixed on the edge of the cavity, and the electric hydraulic cylinder is fixed on the inner side of the cavity. A telescopic rod is fixed to the output end of the electric hydraulic cylinder, a mounting plate is fixed to one end of the telescopic rod, a driving motor is fixedly connected to one side of the mounting plate, a rotating shaft is fixed to the output end of the driving motor, and a driving gear is fixed to one end of the rotating shaft. According to the utility model, the plurality of medium rods and the plurality of groups of transmission frames are arranged, and the electric hydraulic cylinder is controlled to drive the driving motor to move by different distances, so that the driving gear moves on the inner sides of the plurality of groups of transmission frames, and when the insertion depth of one medium rod needs to be adjusted, the driving gear is moved to the inner side of the group of transmission frames for driving; the practicability is high and the use cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of waveguide filters, and in particular relates to a waveguide filter with adjustable bandwidth. Background Art

[0002] A waveguide filter is a type of transmission line filter. Generally, a waveguide filter consists of a discontinuity and a transmission line segment. Both can be equated to corresponding lumped element components and circuits. The waveguide discontinuity provides equivalent reactance, and the transmission line segment is equivalent to a resonant cavity.

[0003] Traditional bandwidth-adjustable waveguide filters typically utilize a micromotor mounted on each tuning screw of the waveguide coupling window. This motor controls the depth of each tuning screw's insertion into the waveguide coupling window, thereby achieving adjustable waveguide filter bandwidth. However, as the number of filter stages increases, the same number of motors is required to control the output. This large number of motors increases the cost of the tunable filter.

[0004] Currently, there is a waveguide filter with adjustable bandwidth (publication number CN208062225U). This patent uses a motor to synchronously drive multiple dielectric rods via a transmission belt, adjusting the depth of the dielectric rods into the coupling window to achieve bandwidth adjustment. However, it cannot adjust the depth of each dielectric rod, resulting in insufficient adjustment flexibility and poor practicality.

[0005] Therefore, there is a need for a waveguide filter with adjustable bandwidth that is low in cost, flexible in adjustment, and highly practical. Utility Model Content

[0006] In order to solve the above problems existing in the prior art, the utility model provides a waveguide filter with adjustable bandwidth, which has the characteristics of low cost, flexible adjustment and strong practicality.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a waveguide filter with adjustable bandwidth, comprising a cavity, an adjustment cavity is provided on the inner side of the cavity, a tuning screw is provided on the inner side of the adjustment cavity, a dielectric rod is passed through one side of the adjustment cavity, an electric hydraulic cylinder is fixed to the edge of the cavity, a telescopic rod is fixed to the output end of the electric hydraulic cylinder, a mounting plate is fixed to one end of the telescopic rod, a drive motor is fixedly connected to one side of the mounting plate, a rotating shaft is fixed to the output end of the drive motor, a driving gear is fixed to one end of the rotating shaft, a first transmission frame is sleeved on the outer side of the driving gear, the first transmission frame comprises a first support ring and a first transmission ring, the first support ring is fixed to the cavity, the first support ring is fixed to the cavity, and the first support ring is fixed to the cavity. A first transmission ring is sleeved on the inner side of the upper end of the ring, a first tooth is fixed on the inner wall of the first transmission ring, the driving gear and the first tooth are meshed with each other, a transmission belt is sleeved on the outer side of the first transmission ring, and a third transmission frame is sleeved on the other end of the transmission belt. The third transmission frame has the same structure as the first transmission frame, a second transmission frame is sleeved on the middle part of the transmission belt, and the second transmission frame includes a second support ring and a second transmission ring. The second support ring is fixed on the cavity, and the second transmission ring is sleeved on the inner side of the upper end of the second support ring. A threaded cylinder is fixed on the inner wall of the second transmission ring, and one end of the dielectric rod is threadedly connected to the inner side of the threaded cylinder. There are multiple first transmission frames, transmission belts, second transmission frames, third transmission frames and dielectric rods.

[0008] As an optimal technical solution for a waveguide filter with adjustable bandwidth of the utility model, a first sleeve groove is provided in the middle of the outer wall of the first transmission ring, a second latching tooth is fixed on the inner wall of the first sleeve groove, a third latching tooth is fixed on the inner wall of the transmission belt, and the second latching tooth and the third latching tooth are engaged with each other.

[0009] As a preferred technical solution for a waveguide filter with adjustable bandwidth of the utility model, first support grooves are symmetrically provided on the edge of the outer wall of the first transmission ring, and the upper end of the first support ring is sleeved on the inner side of the first support groove.

[0010] As an optimal technical solution for an adjustable bandwidth waveguide filter of the utility model, a second sleeve groove is provided in the middle of the outer wall of the second transmission ring, and a fourth latching tooth is fixed on the inner wall of the second sleeve groove, and the fourth latching tooth and the third latching tooth are engaged with each other.

[0011] As a preferred technical solution for an adjustable bandwidth waveguide filter of the present invention, a second support groove is provided on the outer wall edge of the second transmission ring, and the upper end of the second support ring is sleeved on the inner side of the second support groove.

[0012] As a preferred technical solution of a bandwidth-adjustable waveguide filter of the present invention, a transmission screw is fixed to one end of the dielectric rod, and the transmission screw is threadedly connected to the inner side of the threaded barrel.

[0013] As an optimal technical solution for an adjustable bandwidth waveguide filter of the utility model, a limit groove is provided at the top of the transmission screw, a guide hole is provided on the inner wall of the cavity, the transmission screw passes through the guide hole, a limit plate is fixed on the inner wall of the guide hole, and the limit plate is engaged with the inner side of the limit groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] When the utility model is in use, a dielectric rod, an electric hydraulic cylinder, a driving motor, a first transmission frame, a second transmission frame, a third transmission frame and a transmission belt are set, and a first transmission frame, a second transmission frame and a third transmission frame are set on the filter cavity. The transmission belt is sleeved on the outside of the three transmission frames, and the driving motor is fixed on the output end of the electric hydraulic cylinder. The gear at one end of the driving motor is inserted into the inner side of the first transmission frame, and one end of the dielectric rod is threadedly connected to the inner side of the second transmission frame. When adjusting the filter bandwidth, the driving motor can be pushed by controlling the electric hydraulic cylinder to start, so that the driving gear at one end of the driving motor is inserted into the inner side of the first tooth inside the first transmission frame, so that the rotation of the driving gear can drive the first transmission ring of the first transmission frame to rotate, thereby driving the transmission belt to rotate, and thus driving the second transmission ring of the second transmission frame to rotate through the transmission belt, and one end of the dielectric rod The threaded connection is on the inner side of the second transmission ring, and the other end of the dielectric rod is inserted into the inner side of the adjustment cavity. The top surface of the dielectric rod is limited by the engagement of the limit plate and the limit groove, so that when the second transmission ring rotates, the dielectric rod can move. The insertion depth of the dielectric rod can be adjusted by controlling the forward and reverse rotation of the drive motor, thereby adjusting the bandwidth of the filter. By setting multiple dielectric rods and multiple groups of transmission frames, each dielectric rod corresponds to a group of transmission frames. By controlling the electric hydraulic cylinder to drive the drive motor to move different distances, the drive gear is moved inside the multiple groups of transmission frames. When the insertion depth of one of the dielectric rods needs to be adjusted, the drive gear is moved to the inner side of the group of transmission frames for driving. The overall structure is simple, and flexible adjustment of multiple groups of dielectric rods can be achieved through a hydraulic cylinder and a motor, thereby improving the accuracy of bandwidth adjustment, being highly practical, and having low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a three-dimensional schematic diagram of the electric hydraulic cylinder, drive motor, first transmission frame, second transmission frame and third transmission frame of the utility model;

[0019] Figure 3 It is a top view of the first transmission frame, the second transmission frame and the third transmission frame of the present invention;

[0020] Figure 4 For the utility model Figure 3 A magnified schematic diagram of point A in the middle;

[0021] Figure 5 For the utility model Figure 3 A magnified schematic diagram of point B in the middle;

[0022] Figure 6 It is a side view of the cavity of the present utility model.

[0023] In the figure: 1. Cavity; 11. Guide hole; 12. Limiting plate; 2. Adjusting cavity; 3. Tuning screw; 4. Dielectric rod; 41. Transmission screw; 42. Limiting slot; 5. Electric hydraulic cylinder; 51. Telescopic rod; 52. Mounting plate; 6. Driving motor; 61. Rotating shaft; 62. Driving gear; 7. First transmission frame; 71. First support ring; 72. First transmission ring; 721. First latching tooth; 722. First socket groove; 723. Second latching tooth; 724. First support groove; 8. Transmission belt; 81. Third latching tooth; 9. Second transmission frame; 91. Second support ring; 92. Second transmission ring; 921. Threaded barrel; 922. Second socket groove; 923. Fourth latching tooth; 924. Second support groove; 10. Third transmission frame. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0025] See also Figure 1-6 The present invention provides the following technical solutions: a waveguide filter with adjustable bandwidth, comprising a cavity 1, an adjustment cavity 2 provided inside the cavity 1, a tuning screw 3 provided inside the adjustment cavity 2, and a dielectric rod 4 passing through one side of the adjustment cavity 2; the above structures are all common structures of filters in the prior art, and their specific principles and working methods can refer to the prior art, so they are not described in detail here.

[0026] Reference Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6As shown, specifically, an electric hydraulic cylinder 5 is fixed to the edge of the cavity 1, and a micro hydraulic cylinder is adopted. A telescopic rod 51 is fixed to the output end of the electric hydraulic cylinder 5, and a mounting plate 52 is fixed to one end of the telescopic rod 51. A drive motor 6 is fixedly connected to one side of the mounting plate 52, and a micro motor that can rotate forward and reverse is adopted. Both the hydraulic cylinder and the motor can refer to the existing technology. A rotating shaft 61 is fixed to the output end of the drive motor 6, and a driving gear 62 is fixed to one end of the rotating shaft 61. The outer side of the driving gear 62 is sleeved with a first transmission frame 7, and the first transmission frame 7 includes a first support ring 71 and a first transmission ring 72. The first support ring 71 is fixed to the cavity 1, and the inner side of the upper end of the first support ring 71 is sleeved with The first transmission ring 72, the inner wall of the first transmission ring 72 is fixed with a first latch tooth 721, the driving gear 62 and the first latch tooth 721 are engaged with each other, and the first transmission ring 72 can be driven to rotate by the motor, the outer side of the first transmission ring 72 is sleeved with a transmission belt 8, the other end of the transmission belt 8 is sleeved with a third transmission frame 10, the third transmission frame 10 and the first transmission frame 7 have the same structure, the middle part of the transmission belt 8 is sleeved with a second transmission frame 9, the second transmission frame 9 includes a second support ring 91 and a second transmission ring 92, the second support ring 91 is fixed on the cavity 1, the inner side of the upper end of the second support ring 91 is sleeved with the second transmission ring 92, the inner wall of the second transmission ring 92 is fixed with a threaded cylinder 921, one end of the dielectric rod 4 The end is threadedly connected to the inner side of the threaded barrel 921, and one end of the dielectric rod 4 is fixed with a transmission screw 41, which is threadedly connected to the inner side of the threaded barrel 921. A limiting groove 42 is provided on the top of the transmission screw 41, and a guide hole 11 is provided on the inner wall of the cavity 1. The transmission screw 41 passes through the guide hole 11, and a limiting plate 12 is fixed on the inner wall of the guide hole 11. The limiting plate 12 is engaged with the inner side of the limiting groove 42. Through the limitation of the limiting plate 12, the rotation of the second transmission ring 92 can drive the transmission screw 41 to move; a first sleeve groove 722 is provided in the middle of the outer wall of the first transmission ring 72, and a second latch tooth 723 is fixed on the inner wall of the first sleeve groove 722, and a third latch tooth is fixed on the inner wall of the transmission belt 8 81, the second latch tooth 723 and the third latch tooth 81 are engaged with each other, so that the first transmission ring 72 can drive the transmission belt 8 to rotate, thereby realizing the transmission operation of the three transmission frames; the outer wall edge of the first transmission ring 72 is symmetrically provided with a first support groove 724, and the upper end of the first support ring 71 is sleeved on the inner side of the first support groove 724; the middle part of the outer wall of the second transmission ring 92 is provided with a second sleeve groove 922, and the inner wall of the second sleeve groove 922 is fixed with a fourth latch tooth 923, and the fourth latch tooth 923 and the third latch tooth 81 are engaged with each other; the outer wall edge of the second transmission ring 92 is provided with a second support groove 924, and the upper end of the second support ring 91 is sleeved on the inner side of the second support groove 924, and the support rings are all movably sleeved;During use, this solution can rotate the first transmission ring 72 by driving the motor 6, which in turn drives the transmission belt 8, which in turn drives the second transmission ring 92. This causes the threaded barrel 921 to rotate outside the transmission screw 41, thereby moving the transmission screw 41. By controlling the forward and reverse rotation of the motor, the transmission screw 41 can be reciprocated, thereby flexibly controlling the depth of the dielectric rod 4 inserted into the adjustment cavity 2, facilitating adjustment of the filter bandwidth.

[0027] Reference Figure 1 and Figure 2 As shown, specifically, there are multiple first transmission frames 7, transmission belts 8, second transmission frames 9, third transmission frames 10 and dielectric rods 4; three transmission frames and one dielectric rod 4 form a group. By setting multiple groups of transmission frames and multiple dielectric rods 4, the driving motor 6 is driven by a hydraulic cylinder to move different distances, so that the driving gear 62 is engaged on the inner side of different transmission frames, thereby driving multiple groups of transmission frames to operate, thereby realizing the movement of multiple dielectric rods 4 separately, facilitating the flexible adjustment of each dielectric rod 4, and at the same time, the adjustment operation of multiple dielectric rods 4 can be realized by a hydraulic cylinder and a motor, which is highly practical.

[0028] The working principle and usage process of the present invention: When adjusting the filter bandwidth, the present invention starts the electric hydraulic cylinder 5 through the controller, and controls the telescopic rod 51 of the hydraulic cylinder to extend the specified length according to the dielectric rod 4 adjusted as needed, and moves the driving gear 62 of the driving motor 6 to the inner side of the first transmission frame 7 at the specified position, thereby realizing the driven rotation of the first transmission ring 72. At the same time, the transmission belt 8 can drive the second transmission ring 92 of the second transmission frame 9 to rotate, thereby realizing the driven movement of the dielectric rod 4 inside the second transmission ring 92. By controlling the forward and reverse rotation of the driving motor 6 through an external controller, the insertion depth of the current dielectric rod 4 can be controlled, which is convenient for flexible adjustment of the bandwidth. When it is necessary to adjust the insertion depth of other dielectric rods 4, the electric hydraulic cylinder 5 can be controlled to adjust the position of the driving motor 6. The adjustment is flexible and practical.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A waveguide filter with adjustable bandwidth, comprising a cavity (1), characterized in that: An adjusting chamber (2) is provided on the inner side of the cavity (1), a tuning screw (3) is provided on the inner side of the adjusting chamber (2), a dielectric rod (4) is provided through one side of the adjusting chamber (2), an electric hydraulic cylinder (5) is fixed on the edge of the cavity (1), a telescopic rod (51) is fixed on the output end of the electric hydraulic cylinder (5), a mounting plate (52) is fixed on one end of the telescopic rod (51), a driving motor (6) is fixedly connected to one side of the mounting plate (52), a rotating shaft (61) is fixed on the output end of the driving motor (6), a driving gear (62) is fixed on one end of the rotating shaft (61), a first transmission frame (7) is sleeved on the outer side of the driving gear (62), the first transmission frame (7) comprises a first support ring (71) and a first transmission ring (72), the first support ring (71) is fixed on the cavity (1), the first transmission ring (72) is sleeved on the inner side of the upper end of the first support ring (71), the first transmission ring (72) is sleeved on the inner side of the upper end of the first support ring (71), ) is fixed with a first latching tooth (721) on the inner wall thereof, the driving gear (62) and the first latching tooth (721) are meshed with each other, a transmission belt (8) is sleeved on the outer side of the first transmission ring (72), the other end of the transmission belt (8) is sleeved on the third transmission frame (10), the third transmission frame (10) and the first transmission frame (7) have the same structure, a second transmission frame (9) is sleeved on the middle part of the transmission belt (8), the second transmission frame (9) comprises a second support ring (91) and a second transmission ring (92), the second support ring (91) is fixed on the cavity (1), the second transmission ring (92) is sleeved on the inner side of the upper end of the second support ring (91), a threaded barrel (921) is fixed on the inner wall of the second transmission ring (92), one end of the dielectric rod (4) is threadedly connected to the inner side of the threaded barrel (921), and the first transmission frame (7), the transmission belt (8), the second transmission frame (9), the third transmission frame (10) and the dielectric rod (4) are all provided with a plurality of them.

2. The waveguide filter with adjustable bandwidth according to claim 1, wherein: A first sleeve groove (722) is provided in the middle of the outer wall of the first transmission ring (72), a second latching tooth (723) is fixed to the inner wall of the first sleeve groove (722), a third latching tooth (81) is fixed to the inner wall of the transmission belt (8), and the second latching tooth (723) and the third latching tooth (81) are engaged with each other.

3. The waveguide filter with adjustable bandwidth according to claim 2, wherein: A first support groove (724) is symmetrically provided on the outer wall edge of the first transmission ring (72), and the upper end of the first support ring (71) is sleeved on the inner side of the first support groove (724).

4. The waveguide filter with adjustable bandwidth according to claim 3, wherein: A second sleeve groove (922) is provided in the middle of the outer wall of the second transmission ring (92), and a fourth latching tooth (923) is fixed to the inner wall of the second sleeve groove (922), and the fourth latching tooth (923) and the third latching tooth (81) are engaged with each other.

5. The waveguide filter with adjustable bandwidth according to claim 4, characterized in that: A second support groove (924) is provided on the outer wall edge of the second transmission ring (92), and the upper end of the second support ring (91) is sleeved on the inner side of the second support groove (924).

6. The waveguide filter with adjustable bandwidth according to claim 5, characterized in that: A transmission screw (41) is fixed to one end of the dielectric rod (4), and the transmission screw (41) is threadedly connected to the inner side of the threaded barrel (921).

7. The waveguide filter with adjustable bandwidth according to claim 6, characterized in that: A limiting groove (42) is provided on the top of the transmission screw (41), a guide hole (11) is provided on the inner wall of the cavity (1), the transmission screw (41) passes through the guide hole (11), a limiting plate (12) is fixed on the inner wall of the guide hole (11), and the limiting plate (12) is engaged with the inner side of the limiting groove (42).

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