Universal pneumatic test tool for waveguide filter

Abstract

The utility model belongs to the technical field of waveguide filter pneumatic testing, and particularly relates to a waveguide filter universal pneumatic testing tool which comprises a base, a first groove is formed in the top of the base, a waveguide filter is fixedly installed in the first groove, and a second groove penetrating up and down is formed in the right side of the top of the base. The interior of the second groove and the left side of the top of the base are fixedly provided with wave-same conversion test adapters. According to the utility model, a semi-automatic assembly scheme is adopted, and the waveguide filter and the waveguide-coincidence conversion test adapter are pressed through the reverse clamping force of the thrust cylinder, so that the assembly efficiency of a production line is greatly improved, the product quality is stabilized, materials and labor cost required by production are saved, the product test efficiency and the product pass consistency can be improved, and the production efficiency is improved. The product stability is enhanced, the test reject ratio is reduced, the purpose of universally using products with different frequency bands can be achieved by replacing a small part of parts of the tool, and the material cost is saved.

Description

Technical Field

[0001] This utility model relates to the field of waveguide filter aerodynamic testing technology, specifically a general-purpose aerodynamic testing fixture for waveguide filters. Background Technology

[0002] Waveguide filters, a type of transmission line filter, are characterized by high Q-value, low insertion loss, and good temperature stability, making them widely used in various military electronic products requiring high-performance filtering characteristics. With the rapid development of mobile communication technology in the 5G era, the market demand for waveguide filters is also increasing dramatically. However, due to their structural characteristics, waveguide filters require frequent disassembly and assembly of wave-to-wave conversion test adapters during production for performance testing by commissioning personnel, and this is mostly done manually. Manual assembly suffers from low efficiency and poor assembly accuracy, while fully automated assembly cannot meet the workspace and operability requirements of commissioning personnel. Therefore, semi-automated assembly has become the best choice for waveguide filter manufacturers.

[0003] Currently, waveguide filter manufacturers typically perform performance testing by having technicians manually tighten screws to connect the waveguide filter to the wave-to-conversion test adapter. The main drawbacks of manual assembly are: technically, the use of manual screw tightening makes it difficult to guarantee accuracy, easily leading to signal leakage, affecting passive intermodulation, and resulting in poor product testing stability. In terms of cost, not only is manual operation inefficient, but if the waveguide filter's connection holes do not conform to the GBT11449.2-1989 standard waveguide flange holes, they cannot match the standard flange holes of the wave-to-conversion test adapter, requiring re-drilling of the adapter flange. Therefore, to address these issues, a universal pneumatic testing fixture for waveguide filters is proposed. Utility Model Content

[0004] To overcome the shortcomings of existing technologies and solve the problem that waveguide filter manufacturers in the current market mostly connect waveguide filters and wave-to-wave conversion test adapters by manually tightening screws during performance testing, this utility model proposes a universal pneumatic test fixture for waveguide filters.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a general pneumatic test fixture for waveguide filters, including a base, a groove is provided on the top of the base, and a waveguide filter is fixedly installed inside the groove.

[0006] The base has a through-groove groove 2 on the top right side. Wave-to-wave conversion test adapters are fixedly installed inside the groove 2 and on the top left side of the base. The waveguide filter is located between the two wave-to-wave conversion test adapters. Compensation blocks are fixedly installed at the front and rear of the groove 2. The compensation blocks are located below the flange of the wave-to-wave conversion test adapter. The compensation blocks have grooves 3 on both sides of the side of the compensation blocks. Permanent magnets are inserted into the grooves 3. The permanent magnets are magnetically connected to the back of the base.

[0007] A pneumatic testing component is provided between the rear bottom and the rear top of the base, and the pneumatic testing component is installed with the wave-to-wave conversion testing adapter.

[0008] The base has foot supports fixedly installed on the front and rear sides of the left and right sides of the bottom, and the foot supports are threadedly connected to the base.

[0009] Preferably, the pneumatic testing assembly includes thrust cylinders fixedly installed on the left and right sides of the rear of the base bottom by screws. The two thrust cylinders are fixedly installed together by a T-shaped three-way quick connector. A hand lever valve is fixedly installed on the left side of the base by screws. The T-shaped three-way quick connector is fixedly installed to the air outlet of the hand lever valve through an air pipe. Two guide rods are fixedly installed on the rear of the left and right sides of the top of the base. Cylinder pressure block one and cylinder pressure block two are slidably installed on the outer surfaces of the two guide rods on the left and the two guide rods on the right respectively by linear bearings. The center output ends of the two thrust cylinders penetrate the top of the base and are fixedly installed to cylinder pressure block one and cylinder pressure block two respectively by screws. Cylinder pressure block one is fixedly installed to the left-side wave-to-wave conversion test adapter by screws. Cylinder pressure block two is located above the right-side wave-to-wave conversion test adapter.

[0010] Preferably, the left side of the waveguide filter is located below the left-side wave-to-wave conversion test adapter, and the right side of the waveguide filter is located between the cylinder pressure block two and the right-side wave-to-wave conversion test adapter.

[0011] Preferably, both cylinder pressure block one and cylinder pressure block two are made of copper material, which is relatively soft and not easily damaged by impact.

[0012] Preferably, both the base and the compensation block are made of lightweight, oxidation-resistant aluminum material.

[0013] Preferably, it also includes a support component, which is disposed at the bottom of the foot support. The support component includes a threaded hole opened inside the foot support, the lower surface of the threaded hole extending to the outside of the foot support, a threaded rod threadedly connected inside the threaded hole, and a support plate fixedly connected to the bottom end of the threaded rod.

[0014] Preferably, a support pad is fixedly connected to the bottom of the support plate, and the support pad is made of rubber.

[0015] The advantages of this utility model are:

[0016] 1. This utility model adopts a semi-automatic assembly scheme, and uses the reverse clamping force of the thrust cylinder to press the waveguide filter and the wave-to-wave conversion test adapter, which greatly improves the assembly efficiency of the production line, stabilizes product quality, and saves the material and labor costs required for production. At the same time, it can improve product testing efficiency and product pass consistency, enhance product stability, reduce test failure rate, and achieve the purpose of universal products of different frequency bands by replacing a small part of the tooling, thus saving material costs.

[0017] 2. This utility model increases the contact area between the foot support and the base by using a support plate, making the support of the foot support more stable. At the same time, the height of the support plate can be adjusted by the threaded connection between the threaded rod and the threaded hole, and the support plates at the bottom of the four foot supports of the base can also be adjusted. This allows the base to adapt to uneven surfaces and different placement surfaces, so that the fixture can meet more usage needs and has strong practicality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are 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.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure in Example 1;

[0020] Figure 2 This is a schematic diagram of the structure viewed from below in Embodiment 1;

[0021] Figure 3 This is a top view of the structure in Embodiment 1;

[0022] Figure 4 This is a partial cross-sectional view of the support plate in Embodiment 2;

[0023] Figure 5 As in Example 2 Figure 4 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 1. Base; 2. Cylinder pressure block one; 3. Cylinder pressure block two; 4. Compensation block; 5. Permanent magnet; 6. Thrust cylinder; 7. Linear bearing; 8. Guide rod; 9. T-type tee quick connector; 10. Foot support; 11. Air pipe; 12. Hand lever valve; 13. Waveguide filter; 14. Wave-to-wave conversion test adapter; 15. Support plate; 16. Support pad; 17. Threaded hole; 18. Threaded rod. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figure 1-3 As shown, a general-purpose pneumatic testing fixture for waveguide filters includes a base 1, the top of which has a groove, and a waveguide filter 13 is fixedly installed inside the groove.

[0028] The base 1 has a through groove 2 on the top right side. Wave-to-wave conversion test adapters 14 are fixedly installed inside the groove 2 and on the top left side of the base 1. The waveguide filter 13 is located between the two wave-to-wave conversion test adapters 14. Compensation blocks 4 are fixedly installed at the front and rear of the groove 2. The compensation blocks 4 are located below the flange of the wave-to-wave conversion test adapter 14. The compensation blocks 4 have grooves 3 on both the left and right sides. Permanent magnets 5 are inserted into the grooves 3. The permanent magnets 5 are magnetically connected to the back of the base 1.

[0029] A pneumatic testing component is provided between the rear bottom and the rear top of the base 1, and the pneumatic testing component is installed with the wave-to-wave conversion test adapter 14.

[0030] The base 1 has foot supports 10 fixedly installed on the front and rear sides of its bottom left and right sides, and the foot supports 10 are threadedly connected to the base 1. During operation, the center of the front of the base 1 has a groove for placing a waveguide filter 13, which is positioned according to its shape. The right side of the base 1 has a groove for placing a wave-to-digital converter test adapter 14. To accommodate the flange thickness of the test adapter for different frequency bands, a compensation block 4 is placed under the flange of the wave-to-digital converter test adapter 14. The compensation block 4 has two grooves on its side for placing two permanent magnets 5, which are magnetically fixed to the back of the base 1 for easy replacement. This is used to compensate for the flange thickness of the wave-to-digital converter test adapter 14 for different frequency bands. The base 1 has threaded holes 17 on the back to connect to the foot support 10 for supporting and stabilizing the tooling structure. At the same time, the pneumatic testing components can press the waveguide filter and waveguide conversion test adapter 14 together, which greatly improves the assembly efficiency of the production line, stabilizes product quality, and saves the material and labor costs required for production. It can also improve product testing efficiency and product pass consistency, enhance product stability, reduce the test failure rate, and achieve the purpose of universality for products of different frequency bands by replacing a small part of the tooling, thus saving material costs. The waveguide conversion test adapter 14 is a standard part in the communications industry and is exported to connect to a network analyzer. It needs to be replaced according to the waveguide filter 13 of different frequency bands. The flange size conforms to the waveguide flange size standard GBT 11449.2-1989.

[0031] The pneumatic testing assembly includes thrust cylinders 6 fixedly mounted on the left and right sides of the rear bottom of the base 1 with screws. The two thrust cylinders 6 are fixedly connected by a T-shaped tee quick connector 9. A lever valve 12 is fixedly mounted on the left side of the base 1 with screws. The T-shaped tee quick connector 9 is fixedly connected to the air outlet of the lever valve 12 via an air pipe 11. Two guide rods 8 are fixedly mounted on the rear of the left and right sides of the top of the base 1. Cylinder pressure blocks 1 2 and 2 3 are slidably mounted on the outer surfaces of the two guide rods 8 on the left and the two guide rods 8 on the right respectively via linear bearings 7. The center output ends of the two thrust cylinders 6 penetrate the top of the base 1 and are fixedly mounted to cylinder pressure blocks 1 2 and 2 3 respectively with screws. Cylinder pressure block 1 2 is fixedly mounted to the left-side wave-to-wave conversion test adapter 14 with screws. Cylinder pressure block 2 3 is located above the right-side wave-to-wave conversion test adapter 14. During operation, the lever valve 12 is turned to ensure that the T-shaped tee valve 12 is connected to the base 1. The center output end of the thrust cylinder 6, which is connected to the quick-connect tee 9 and the air pipe 11, is in an extended state. This allows the cylinder blocks 1 2 and 2 3, which are installed with the waveguide conversion test adapter 14 via screws, to be lifted. Both cylinder blocks 1 2 and 2 3 slide on the outer surface of the guide rod 8 via linear bearings 7. Then, by turning the lever valve 12, the two thrust cylinders 6 retract, causing cylinder blocks 1 2 to press against the waveguide filter 13 with the waveguide conversion test adapter 14 and cylinder blocks 2 3 on the left. The waveguide conversion test adapter 14 on the right is located below and to the right of the waveguide filter 13. Therefore, the reverse clamping force of the thrust cylinders 6 presses the waveguide filter 13 against the waveguide conversion test adapter 14, which greatly improves the assembly efficiency of the production line, stabilizes product quality, and saves on the material and labor costs required for production. Then, the waveguide filter 13 can be adjusted and tested. At the same time, the front of cylinder block 1 2 has a standard waveguide port and a threaded hole 17 (size according to GBT). The waveguide flange dimensions are 11449.2-1989. The waveguide conversion test adapter 14 is fixed with screws. The front has a through hole for tight fit with the linear bearing 7 and is connected to the center output end of the thrust cylinder 6 with screws. Therefore, the cylinder pressure block 12 is a replaceable part and needs to be replaced with waveguide filters 13 of different frequency bands to achieve the purpose of tooling universality. The cylinder pressure block 23 has a through hole on the front for tight fit with the linear bearing 7 and is indirectly slidably fitted with the guide rod 8. It is also connected to the center output end of the thrust cylinder 6 with screws. The front has a reserved through hole for auxiliary positioning with other guide rods 8 when the outer dimensions of the waveguide filter 13 deviate.

[0032] The left side of the waveguide filter 13 is located below the left-side wave-to-wave conversion test adapter 14, and the right side of the waveguide filter 13 is located between the cylinder pressure block 3 and the right-side wave-to-wave conversion test adapter 14; during operation, this facilitates the waveguide filter 13 being pressed firmly on the base 1.

[0033] Both cylinder pressure block 2 and cylinder pressure block 3 are made of soft copper material that is less likely to damage the product. During operation, cylinder pressure block 2 and cylinder pressure block 3 are less likely to damage the product to be tested, and the performance is better.

[0034] Both the base 1 and the compensation block 4 are made of lightweight and oxidation-resistant aluminum material; during operation, the base 1 and the compensation block 4 are relatively lightweight and have good oxidation resistance.

[0035] Example 2

[0036] Please see Figure 4-5 As shown in the comparison embodiment one, as another embodiment of this utility model, it also includes a support component. The support component is disposed at the bottom of the foot support 10. The support component includes a threaded hole 17 opened inside the foot support 10. The lower surface of the inner surface of the threaded hole 17 extends to the outside of the foot support 10. A threaded rod 18 is threadedly connected inside the threaded hole 17. A support plate 15 is fixedly connected to the bottom end of the threaded rod 18. During operation, the support plate 15 increases the contact area between the foot support 10 and the base, and makes the support of the foot support 10 on the base 1 more stable. At the same time, the height of the support plate 15 can be adjusted through the threaded connection between the threaded rod 18 and the threaded hole 17, and the support plates 15 at the bottom of the four foot supports 10 at the bottom of the base 1 can be adjusted. In this way, the base 1 can adapt to uneven placement surfaces and can be placed on different surfaces, so that the fixture can meet more usage needs and has strong practicality.

[0037] The bottom of the support plate 15 is fixedly connected to a support pad 16, which is made of rubber. During operation, the rubber support pad 16 increases the friction of the support plate 15, allowing the support plate 15 to be placed stably on the placement surface.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A general pneumatic testing fixture for waveguide filters, comprising a base (1), wherein a groove is provided on the top of the base (1), and a waveguide filter (13) is fixedly installed inside the groove. Its features are: The base (1) has a through groove on the top right side. A wave-to-wave conversion test adapter (14) is fixedly installed inside the groove and on the top left side of the base (1). The waveguide filter (13) is located between the two wave-to-wave conversion test adapters (14). A compensation block (4) is fixedly installed in front and behind the groove. The compensation block (4) is located below the flange of the wave-to-wave conversion test adapter (14). A groove (3) is opened on both the left and right sides of the compensation block (4). A permanent magnet (5) is inserted into the groove. The permanent magnet (5) is magnetically connected to the back of the base (1). A pneumatic testing component is provided between the bottom rear and top rear of the base (1), and the pneumatic testing component is installed with the wave-to-wave conversion test adapter (14). The base (1) has foot supports (10) fixedly installed on the front and rear sides of the left and right sides of the bottom, and the foot supports (10) are threadedly connected to the base (1).

2. The universal pneumatic testing fixture for waveguide filters according to claim 1, characterized in that: The pneumatic testing assembly includes thrust cylinders (6) fixedly installed on the left and right sides of the rear bottom of the base (1) by screws. The two thrust cylinders (6) are fixedly installed together by a T-shaped three-way quick connector (9). A hand lever valve (12) is fixedly installed on the left side of the base (1) by screws. The T-shaped three-way quick connector (9) is fixedly installed to the air outlet of the hand lever valve (12) through an air pipe (11). Two guide rods (8) are fixedly installed on the rear of the left and right sides of the top of the base (1). The two guide rods (8) on the left side are... The outer surface of the two guide rods (8) on the right side is slidably mounted with cylinder pressure block one (2) and cylinder pressure block two (3) respectively via linear bearings (7). The center output ends of the two thrust cylinders (6) pass through the top of the base (1) and are fixedly mounted to cylinder pressure block one (2) and cylinder pressure block two (3) respectively by screws. Cylinder pressure block one (2) is fixedly mounted to the wave conversion test adapter (14) on the left side by screws. Cylinder pressure block two (3) is located above the wave conversion test adapter (14) on the right side.

3. The universal aerodynamic testing fixture for waveguide filters according to claim 2, characterized in that: The left side of the waveguide filter (13) is located below the left-side wave-to-wave conversion test adapter (14), and the right side of the waveguide filter (13) is located between the cylinder pressure block 2 (3) and the right-side wave-to-wave conversion test adapter (14).

4. The universal aerodynamic testing fixture for waveguide filters according to claim 3, characterized in that: Both cylinder pressure block one (2) and cylinder pressure block two (3) are made of copper material, which is relatively soft and not easy to damage the product.

5. The universal aerodynamic testing fixture for waveguide filters according to claim 4, characterized in that: Both the base (1) and the compensation block (4) are made of lightweight and oxidation-resistant aluminum.

6. The universal aerodynamic testing fixture for waveguide filters according to claim 5, characterized in that: It also includes a support assembly, which is disposed at the bottom of the foot support (10). The support assembly includes a threaded hole (17) opened inside the foot support (10). The lower surface of the threaded hole (17) extends to the outside of the foot support (10). A threaded rod (18) is threadedly connected inside the threaded hole (17). A support plate (15) is fixedly connected to the bottom end of the threaded rod (18).

7. A universal aerodynamic testing fixture for waveguide filters according to claim 6, characterized in that: The bottom of the support plate (15) is fixedly connected to a support pad (16), which is made of rubber.

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