A clamping tool for cavity filter detection

Abstract

The utility model relates to a kind of clamping tool for cavity filter detection, including base, adjustable directional conveying workpiece to be measured is provided with conveying assembly on the base, multiple center clamping assemblies that can conveniently limit workpiece to be measured are arranged at interval on the conveying belt of conveying assembly;Support frame that can provide overhang installation plane above the conveying belt is also provided on the base, lifting adjustment assembly is detachably connected on the lower plate surface of the mounting plate of the support frame, displacement butt joint component that can be adjusted interval distance is arranged in the way of alignment with two wiring guides in the axial lower end of the lifting adjustment assembly.The utility model can make different processes can be carried out simultaneously by separating feeding and discharging station and detection station, to improve the efficiency of batch detection, while adaptively clamping and limiting multiple specifications of workpiece and adaptively detecting butt joint can improve the scope of application.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary tools for cavity filter testing, and in particular to a clamping fixture for cavity filter testing. Background Technology

[0002] Cavity filters, composed of resonant cavities, tuning screws, and other components, offer advantages over other types of filters. They are robust, reliable, compact, have a moderate Q value, a long high-end parasitic passband, and excellent heat dissipation. Suitable for higher power and frequencies, they effectively filter out strong out-of-band interference signals. As a frequency-selective device, a cavity filter allows specific frequency components of a signal to pass through while significantly attenuating other frequency components. Therefore, to ensure filter quality and performance, testing is necessary after production.

[0003] Currently, the conventional testing method involves manually attaching a probe connected to a spectrum analyzer to the connection port of the cavity filter, followed by testing using the spectrum analyzer. This method suffers from poor stability due to human operation during frequency detection, resulting in low testing efficiency and accuracy. Although existing filter testing equipment can clamp the cavity filter as needed to ensure stability during filter connection and thus improve testing accuracy and reduce error, it only provides a single clamping station. This means that workpiece testing and workpiece loading / unloading cannot be performed simultaneously. After testing, a long interval is required for workpiece replacement, leading to long overall time consumption, low testing efficiency, and hindering batch testing. Furthermore, existing testing devices typically have complex clamping structures, making disassembly and assembly cumbersome and difficult, hindering rapid disassembly and assembly. They are also usually only applicable to a single type of filter, unable to adapt to limit and test connections for multiple filter types, resulting in a narrow range of applications. Utility Model Content

[0004] The purpose of this utility model is to provide a clamping fixture for cavity filter testing that can improve the efficiency of batch testing by separating the loading / unloading station and the testing station, allowing different processes to be carried out simultaneously. At the same time, it can adaptably clamp and limit the workpieces of various specifications and adapt to testing docking, thereby expanding the scope of application. This solves the problems of existing testing devices that only provide a single station, which makes it impossible to carry out loading / unloading operations and testing operations simultaneously, resulting in low overall testing efficiency in batch testing. Furthermore, the existing clamping structure is cumbersome to disassemble and assemble, and the testing structure is difficult to dock, which is not conducive to quick disassembly and assembly. Moreover, it is only applicable to workpieces of a single specification, resulting in a narrow scope of application.

[0005] The technical solution adopted by this utility model is as follows: a clamping fixture for cavity filter testing, including a base, a conveying assembly for adjustable orientation of the workpiece to be tested is provided on the base, and a plurality of centering clamping assemblies for convenient positioning of the workpiece to be tested are arranged at intervals on the conveyor belt of the conveying assembly; a support frame for providing a suspended mounting plane above the conveyor belt is also provided on the base, a lifting adjustment assembly is detachably connected to the lower plate of the mounting plate of the support frame, and a displacement docking assembly for aligning two wiring conductors at an adjustable interval is provided at the lower axial end of the lifting adjustment assembly.

[0006] According to a preferred embodiment, the mounting plate of the centering clamping assembly is connected to the conveyor belt via a centering support strip, and symmetrically arranged alignment connecting strips on both sides of the centering support strip are provided on the bottom surface of the mounting plate, with a magnetic support plate at the bottom of the alignment connecting strips; two first alignment clamping mechanisms capable of lateral centering and limiting the workpiece to be tested are arranged laterally on the top surface of the mounting plate; and two sets of second alignment clamping mechanisms capable of longitudinally centering and limiting the workpiece to be tested are also arranged longitudinally on the top surface of the mounting plate.

[0007] According to a preferred embodiment, the first alignment clamping mechanism includes a positioning horizontal plate erected on the mounting plate, a plurality of first elastic members spaced apart from each other on the surface of the positioning horizontal plate, and an inclined limiting clamping plate connected to one end of the first elastic members away from the positioning horizontal plate.

[0008] According to a preferred embodiment, the second alignment clamping mechanism includes a positioning plate groove mounted on a mounting plate, a second elastic member disposed in a vertical cavity of the positioning plate groove, and a ramp limiting clamping strip connected to the second elastic member and partially extending out of the vertical cavity of the positioning plate groove.

[0009] According to a preferred embodiment, the conveying assembly includes conveyor rollers, a conveyor belt, a support column, and a conveyor motor. The two conveyor rollers are supported on the base at intervals by the support column, and the conveyor belt is simultaneously mounted on the two conveyor rollers in a manner that forms a conveying plane. The side of the support column is also provided with a conveyor motor that can be driven to connect with the conveyor rollers to drive the conveyor belt to rotate.

[0010] According to a preferred embodiment, the support vertical rods of the support frame suspend the mounting plate above the transmission plane defined by the conveyor belt by connecting to the four corners of the mounting plate; the middle part of the support vertical rod is also connected to an auxiliary stabilization mechanism that is located between the two parallel sections of the conveyor belt and can provide auxiliary support for the central clamping assembly moving to the detection station.

[0011] According to a preferred embodiment, the lifting rod of the lifting adjustment assembly is connected to the bottom surface of the mounting plate via a connecting top plate, and the axial lower end of the lifting rod is also connected to the suspended plate of the displacement docking assembly via a connecting end sleeve.

[0012] According to a preferred embodiment, a guide groove is provided on the bottom surface of the suspended plate, and a double-threaded transmission screw is rotatably inserted in the guide groove. A transmission slider is threaded onto the two sections of the double-threaded transmission screw with opposite thread directions. One end of the double-threaded transmission screw passes through the end face of the guide groove and is connected to an adjusting motor disposed outside the guide groove. A connecting base for mounting wiring guides is provided on the end face of the transmission slider extending outside the guide groove.

[0013] According to a preferred embodiment, the auxiliary stabilization mechanism includes a central support plate connected to the corner of the plate and the supporting vertical rod, and a lower magnetic support plate detachably disposed on the central support plate.

[0014] The beneficial effects of this utility model are:

[0015] The conveying component provided in this application can be combined with the centrally positioned clamping components arranged at intervals to form multiple clamping stations arranged at intervals on the conveying plane, so that the clamping and loading operations, unloading operations and inspection operations can be performed simultaneously at different positions, realizing the overlap of operation procedures for different workpieces, thereby effectively reducing the overall time consumption during batch processing and improving the overall inspection speed and efficiency.

[0016] This application's centering clamping component is adaptable to filters of various specifications, enabling centered positioning of filters of different sizes and expanding the applicability of the clamping structure. The centering clamping component, through its elastic limiting structure and clamping end face with a sloping guide, allows for convenient assembly and disassembly of the filter via downward clamping and upward pulling, improving ease of assembly and disassembly. This application, by setting up a first alignment clamping mechanism arranged laterally and a second alignment clamping mechanism arranged longitudinally, can cooperate to position the workpiece to be tested at the center of the top surface of the mounting plate. This allows the wiring guide pushed by the displacement docking component to simultaneously and accurately dock with the wiring ports at both ends of the workpiece, improving the accuracy and stability of the docking test.

[0017] The lifting adjustment component and the displacement docking component provided in this application can change the spacing and height of the wiring conductors arranged in the alignment according to actual needs, so as to effectively adapt to cavity filters of different specifications, thereby improving the adaptability of the detection docking. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a preferred clamping fixture for cavity filter testing proposed in this utility model;

[0019] Figure 2 This is a top view of the centering clamping component of a preferred clamping fixture for cavity filter testing proposed in this utility model;

[0020] Figure 3 This is a side plan view of the lifting adjustment assembly, displacement docking assembly, and wiring guide of a preferred clamping fixture for cavity filter testing proposed in this utility model. Detailed Implementation

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0023] The following is a detailed explanation with reference to the accompanying drawings. Example

[0024] This application provides a clamping fixture for cavity filter testing, which includes a base 1, a transmission assembly 2, a centering clamping assembly 3, a support frame 4, a lifting and adjusting assembly 5, a displacement docking assembly 6, and a wiring guide 7.

[0025] according to Figure 1-3In one specific embodiment shown, the base 1 provides an elevated mounting surface for convenient installation of multiple functional components in the same area. A conveyor assembly 2 is provided on the base 1 for adjustable orientation and transport of the workpiece to be tested. Multiple centering clamping assemblies 3, capable of conveniently limiting the position of the workpiece to be tested, are spaced apart on the conveyor belt 21 of the conveyor assembly 2. A support frame 4 is also provided on the base 1 to provide a suspended mounting surface above the conveyor belt 22. A lifting adjustment assembly 5 is detachably connected to the lower surface of the mounting plate 42 of the support frame 4. A displacement docking assembly 6 is provided at the axial lower end of the lifting adjustment assembly 5, aligning two wiring conductors 7, which are respectively connected to the positive and negative terminals of the spectrum analyzer, with an adjustable spacing.

[0026] Preferably, the conveying assembly 2 includes conveyor rollers 21, a conveyor belt 22, support columns 23, and a conveyor motor 24. Preferably, two conveyor rollers 21 are supported on the base 1 at intervals by the support columns 23. Preferably, the conveyor belt 22 is simultaneously mounted on the two conveyor rollers 21 in a manner that forms a conveying plane. Preferably, the side of the support column 23 is also provided with a conveyor motor 24 that can be driven to rotate and move the conveyor belt 22 by being connected to the conveyor rollers 21. Specifically, the conveyor rollers 21 are positioned above the base 1 in a manner parallel to the base 1, and the two ends of the conveyor rollers 21 are rotatably inserted into the sides of two support columns 23 that are parallel to each other and vertically mounted on the top surface of the base 1. Preferably, the conveyor motor 24 is a dedicated NEMA17 intermittent start-stop stepper motor for intermittent drive of the conveyor belt, capable of maintaining a torque of 3.0 N·m, a step angle of 1.8°, and a rated current of 1.2A (12-36V). It is equipped with a programmable TMC2160 driver chip, allowing operators to encode and variably adjust the drive parameters according to actual needs, ensuring the distance accuracy and cycle of the intermittent drive. It also features encoder feedback to solve the problem of missed steps, making it suitable for high-precision or variable-speed scenarios. The conveyor assembly 2 provided in this application can be combined with the spaced-apart, centrally positioned clamping assemblies 3 to form multiple clamping stations spaced apart on the conveyor plane. This allows loading, unloading, and inspection operations to be performed simultaneously at different positions, achieving overlap of operation procedures for different workpieces. This effectively reduces the overall time consumption during batch processing and improves the overall inspection speed and efficiency.

[0027] Preferably, the centering clamping assembly 3 includes a mounting plate 31, a centering support bar 32, an alignment connecting bar 33, a magnetic support plate 34, a first alignment clamping mechanism 35, and a second alignment clamping mechanism 36. Preferably, the mounting plate 31 of the centering clamping assembly 3 is connected to the conveyor belt 22 via the centering support bar 32. Preferably, alignment connecting bars 33 are symmetrically arranged on both sides of the centering support bar 32 on the bottom surface of the mounting plate 31. More preferably, a magnetic support plate 34 is provided at the bottom of the alignment connecting bar 33, which can movably abut against the surface of the conveyor belt 22 to assist the centering support bar 32 in providing stable support for the mounting plate 31. Preferably, two first alignment clamping mechanisms 35 are laterally aligned and arranged on the top surface of the mounting plate 31 to perform lateral centering and limiting of the workpiece to be tested. Preferably, two sets of second alignment clamping mechanisms 36 are longitudinally aligned and arranged on the top surface of the mounting plate 31 to perform longitudinal centering and limiting of the workpiece to be tested. Specifically, the active contact means that the magnetic support plate 34 can also maintain contact with the conveyor belt 22 on the transmission plane, thereby cooperating with the centering support bar 32 to achieve multi-point support and ensure the stability of the mounting plate 31. Preferably, the mounting plate 31 adopts a plate body with a high degree of smoothness on the top surface, so that the workpiece to be tested can be effectively translated under the push of the first alignment clamping mechanism 35 and the second alignment clamping mechanism 36 to ensure the accuracy of centering. Specifically, by setting the four second alignment clamping mechanisms 36 as two sets of longitudinal centering clamping structures aligned along the longitudinal centerline, the wiring ports at both ends of the workpiece to be tested can be effectively exposed while ensuring the centering effect of the workpiece to be clamped, so that the wiring guide 7 can be effectively inserted and connected to the wiring port. This application sets up a first alignment clamping mechanism 35 arranged laterally and a second alignment clamping mechanism 36 arranged longitudinally to cooperate in placing the workpiece to be tested at the center of the top surface of the mounting plate 31. This allows the wiring guide 7 pushed by the displacement docking assembly 6 to accurately dock with the wiring ports at both ends of the workpiece to be tested, thereby improving the accuracy and stability of the detection docking.

[0028] Preferably, the first alignment clamping mechanism 35 includes a positioning horizontal plate 351 erected on the mounting plate 31, a plurality of spaced first elastic members 352 connected to the surface of the positioning horizontal plate 351, and an inclined limiting clamping plate 353 connected to the end of the first elastic members 352 away from the positioning horizontal plate 351. Preferably, the inclined limiting clamping plate 353 has a plate length smaller than the minimum interval between the two sets of second alignment clamping mechanisms 36, and both sides of the two aligned inclined limiting clamping plates 353 are provided with inclined slope surfaces to facilitate the pressing of the workpiece to be measured between the two inclined limiting clamping plates 353 from top to bottom, so as to achieve convenient clamping.

[0029] Preferably, the second alignment clamping mechanism 36 includes a positioning plate groove 361 mounted on the mounting plate 31, a second elastic element 362 disposed in the vertical cavity of the positioning plate groove 361, and a ramp limiting clamping bar 363 connected to the second elastic element 362 and partially extending out of the vertical cavity of the positioning plate groove 361. Preferably, the opposing sides of the main body of the ramp limiting clamping bar 363 are provided with an upward tilt angle, so that the workpiece to be tested, when pressed down, can be guided by the ramp and quickly and accurately positioned downwardly in a centered position.

[0030] Preferably, the positioning plate 351 and the positioning groove 361 can be fixed to the mounting plate 31 by welding, interference fit, or other methods. The inclined limiting clamping plate 353 and the ramp limiting clamping strip 363 have smooth bottom surfaces, resulting in a low coefficient of friction between them and the mounting plate 31. This improves the effectiveness and smoothness of the elastic members pushing them, ensuring equal alignment forces during centering and clamping. Preferably, the limiting springs used in the first elastic member 352 and the second elastic member 362 are connected and limited in an array arrangement, resulting in high overall guiding stability and effectively elastically limiting the centering position of the workpiece. More preferably, the two ends of the first elastic member 352 and the second elastic member 362 can be installed by pressure plate locking or welding. Preferably, the aligned elastic members have equal elastic strength to ensure balanced elastic clamping and centering effect. More preferably, the actual elastic strength of the first elastic element 352 and the second elastic element 362 is selected by the operator according to requirements, and is not directly limited to lightweight springs with poor structural strength. Preferably, both the first alignment clamping mechanism 35 and the second alignment clamping mechanism 36 use elastic limiting to clamp the workpiece, so that the centering clamping component 3 can be adapted to filters of various specifications, and can center and limit filters of different specifications, thus improving the applicability of the clamping structure. The centering clamping component 3, by setting an elastic limiting structure and a clamping end face with a sloping guide, enables the filter to be easily assembled and disassembled by pressing down and pulling up, thus improving the convenience of assembly and disassembly.

[0031] Preferably, the support vertical rods 41 of the support frame 4 suspend the mounting plate 42 above the transmission plane defined by the conveyor belt 22 by connecting to the four corners of the mounting plate 42. Preferably, the middle of the support vertical rod 41 is also connected to an auxiliary stabilizing mechanism 43, which is located between the two parallel sections of the conveyor belt 22 and provides auxiliary support for the centering clamping assembly 3 moving to the inspection station. Preferably, the support vertical rod 41 can be assembled with the mounting plate 42 and the auxiliary stabilizing mechanism 43 by welding or bolting.

[0032] Preferably, the auxiliary stabilization mechanism 43 includes a central support plate 431 connected to the corner of the plate and the support vertical rod 41, and a lower magnetic support plate 432 detachably mounted on the central support plate 431. Specifically, the lower magnetic support plate 432 provides a magnetic traction force when the magnetic support plate 34 moves above it, so that the magnetic support plate 34 is effectively pressed against the conveyor belt 22, and the mounting plate 31 is stably supported on the conveyor belt 22, preventing the mounting plate 31 from deflecting and shaking, which could cause misalignment between the workpiece to be tested and the wiring guide 7. Preferably, the lower magnetic support plate 432 is supported by a micro-magnetic permanent magnet, so that it can pull the magnetic support plate 34 down without hindering the lateral movement of the magnetic support plate 34 along with the conveyor belt 22. For example, the magnitude of the magnetic attraction force can be 0.1-0.2 times the translational force, ensuring the stability of the abutment support while avoiding the problem of hindering translation.

[0033] Preferably, the lifting rod 52 of the lifting adjustment assembly 5 is connected to the bottom surface of the mounting plate 42 via the connecting top plate 51. More preferably, the lower axial end of the lifting rod 52 is also connected to the suspended plate 61 of the displacement docking assembly 6 via the connecting end sleeve 53 using a locking screw limiting sleeve. Preferably, the lifting rod 52 can be an XPFR-200 type high-precision electro-hydraulic lifting rod that can be controlled by a control module such as a controller, so that it can pre-adjust the working height of the displacement docking assembly 6 and the wiring guide 7 according to requirements, thereby enabling effective docking with the wiring ports of filters of different thicknesses.

[0034] Preferably, the displacement docking assembly 6 includes a suspended plate 61, a guide groove 62, a double-threaded drive screw 63, a transmission slider 64, an adjusting motor 65, and a connecting base 66. Preferably, a guide groove 62 perpendicular to the movement direction of the conveyor belt 22 is provided on the bottom surface of the suspended plate 61. Preferably, a double-threaded drive screw 63 with two sections of threads in opposite directions is rotatably inserted into the guide groove 62. More preferably, transmission sliders 64, which are movably embedded in the guide groove 62 and whose movement direction is defined by the guide groove 62, are threaded onto the two sections of the double-threaded drive screw 63 with opposite thread directions. Preferably, one end of the double-threaded drive screw 63 passes through the end face of the guide groove 62 and is connected to the adjusting motor 65 located outside the guide groove 62. Preferably, the adjusting motor 65 can be a KTD683A servo motor capable of setting critical torque as needed. It can achieve precise torque control through a closed-loop control system. Its driver can adjust the current in real time according to input commands (such as analog signals or communication protocols), thereby changing the output torque. In torque mode, the user can directly set the target torque value. When the motor output shaft rotates to achieve the preset output torque—that is, when the clamping force of the wiring guide 7 against the wiring port of the workpiece reaches the set threshold after a certain translation distance—the servo motor automatically locks and stops in this posture. Specifically, in torque control mode, the servo motor monitors the output torque in real time through the servo driver. When the set threshold is reached, the controller (such as a PLC) switches from trigger mode to position control mode and records the current rotational position of the motor output shaft as the target position. At this time, the motor stops rotating and maintains the current position, while continuously outputting torque to resist external disturbances, keeping its linkage structure in a clamping state. After the detection is completed, the servo motor starts to rotate in the opposite direction, causing the two transmission sliders 64 to move in opposite directions, thus releasing the detection connection. Preferably, a connecting base 66 for mounting wiring guides 7 is provided on the end face of the transmission slider 64 extending to the outside of the guide groove 62. The double-threaded transmission screw 63 provided in this application can be adjusted to rotate forward or backward under the drive of the adjusting motor 65, causing the two transmission sliders 64 to drive the connecting base 66 to move towards or away from each other. This allows the aligned wiring guides 7 mounted on the two connecting bases 66 to connect with the wiring ports of different specifications of cavity filters as needed, enabling the detection connection end to adaptably form an effective detection circuit with different specifications of cavity filters for accurate cyclic detection. Preferably, the operating process of the adjusting motor 65 provided in this application is pre-set manually according to the actual specifications of each batch of cavity filters to be tested, so that the adjusting motor 65 can perform cyclic operation according to the pre-programmed operating procedure.

[0035] Preferably, probes 71 with wiring guides 7 are installed on the opposing sides of the two connecting bases 66. Preferably, probes 72 connected to external wires are provided inside the probes 71. Specifically, the probes 72 are connected to a general-purpose spectrum analyzer via external wires, so that when the two aligned probes 72 are inserted into the two wiring ports at both ends of the cavity filter, the cavity filter can form an effective closed-loop electrical circuit with the general-purpose spectrum analyzer, enabling the pre-configured general-purpose spectrum analyzer to test the cavity filter. Specifically, this application is mainly applicable to the KR series, PE series, and LC series planar cavity filters developed and manufactured by the applicant. The spectrum analyzer used in this application can be a UTS3084 series or DSA815 series product.

[0036] Preferably, the electrical components involved in this application, such as the transmission motor 24, lifting rod 52, adjusting motor 65, and spectrum analyzer, are all electrically connected to the controller and power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0037] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0038] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A clamping fixture for cavity filter testing, comprising a base (1), characterized in that, A conveying assembly (2) for adjusting and directionally conveying the workpiece to be tested is provided on the base (1), and multiple centering clamping assemblies (3) for conveniently limiting the workpiece to be tested are arranged at intervals on the conveyor belt (22) of the conveying assembly (2). A support frame (4) is also provided on the base (1) to provide a suspended mounting plane above the conveyor belt (22). A lifting adjustment component (5) is detachably connected to the lower plate of the mounting plate (42) of the support frame (4). A displacement docking component (6) is provided at the lower axial end of the lifting adjustment component (5) to align the two wiring guides (7) with an adjustable interval distance.

2. The clamping fixture for cavity filter testing as described in claim 1, characterized in that, The mounting plate (31) of the centering clamping component (3) is connected to the conveyor belt (22) through the centering support strip (32), and the bottom surface of the mounting plate (31) is also symmetrically provided with the alignment connecting strips (33) on both sides of the centering support strip (32), and the bottom of the alignment connecting strips (33) is provided with a magnetic support plate (34). Two first alignment clamping mechanisms (35) capable of laterally centering and limiting the workpiece to be tested are arranged laterally on the top surface of the mounting plate (31). On the top surface of the mounting plate (31), two sets of second alignment clamping mechanisms (36) are also arranged longitudinally to perform longitudinal centering and limiting of the workpiece to be tested.

3. The clamping fixture for cavity filter testing as described in claim 2, characterized in that, The first alignment clamping mechanism (35) includes a positioning horizontal plate (351) erected on the mounting plate (31), a plurality of first elastic members (352) spaced apart and connected to the surface of the positioning horizontal plate (351), and an inclined limiting clamping plate (353) connected to the end of the first elastic member (352) away from the positioning horizontal plate (351).

4. The clamping fixture for cavity filter testing as described in claim 3, characterized in that, The second alignment clamping mechanism (36) includes a positioning plate groove (361) mounted on a mounting plate (31), a second elastic member (362) disposed in the vertical cavity of the positioning plate groove (361), and a ramp limiting clamp (363) connected to the second elastic member (362) and partially extending out of the vertical cavity of the positioning plate groove (361).

5. The clamping fixture for cavity filter testing as described in claim 4, characterized in that, The conveying assembly (2) includes a conveyor roller (21), a conveyor belt (22), a support column (23), and a conveyor motor (24), wherein, The two conveyor rollers (21) are supported at intervals on the base (1) by support columns (23), and the conveyor belt (22) is simultaneously mounted on the two conveyor rollers (21) in a manner that forms a conveying plane. The side of the support column (23) is also provided with a transmission motor (24) that can be connected to the transmission roller (21) to drive the transmission belt (22) to rotate.

6. The clamping fixture for cavity filter testing as described in claim 5, characterized in that, The support vertical rods (41) of the support frame (4) are connected to the four corners of the mounting plate (42) to suspend the mounting plate (42) above the transmission plane defined by the conveyor belt (22); The middle part of the plate of the support rod (41) is also connected to an auxiliary stabilization mechanism (43) which is located between the two parallel belts of the conveyor belt (22) and can provide auxiliary support for the centering clamping assembly (3) moving to the detection station.

7. The clamping fixture for cavity filter testing as described in claim 6, characterized in that, The lifting rod (52) of the lifting adjustment assembly (5) is connected to the bottom surface of the mounting plate (42) through the connecting top plate (51), and the lower axial end of the lifting rod (52) is also connected to the suspended plate (61) of the displacement docking assembly (6) through the connecting end sleeve (53).

8. The clamping fixture for cavity filter testing as described in claim 7, characterized in that, A guide groove (62) is provided on the bottom surface of the suspended plate (61), and a double-threaded transmission screw (63) is rotatably inserted in the guide groove (62). Transmission sliders (64) are threaded onto the two sections of the double-threaded transmission screw (63) with opposite thread directions. One end of the double-threaded drive screw (63) passes through the end face of the guide groove (62) and is connected to the adjustment motor (65) located outside the guide groove (62). The transmission slider (64) extends to the outside of the guide groove (62) and is provided with a connecting base (66) for mounting the wiring guide (7).

9. The clamping fixture for cavity filter testing as described in claim 8, characterized in that, The auxiliary stabilization mechanism (43) includes a central support plate (431) connected to the corner of the plate and the support vertical rod (41) and a lower magnetic support plate (432) detachably mounted on the central support plate (431).

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