A vibration test tool applied to a meter antenna

Abstract

The utility model discloses a vibration test frock for meter antenna, including base and support frame, base include mesa, set up fixed hole and sink groove on the mesa, through bolt of being installed on fixed hole will base fixed on the vibration table, set up base at the abutment of sink groove and mesa, set up fixed hole on the base. The frock disclosed by the utility model can satisfy the test requirement of meter antenna under the severe vibration environment, and has the advantages of small volume, light weight, simple structure, low processing cost, convenient operation and the like.

Description

Technical Field

[0001] This utility model belongs to the field of test fixture technology, and specifically relates to a vibration test fixture for instrument antennas. Background Technology

[0002] Airborne antennas typically require vibration testing during development, which necessitates the use of fixtures to secure the antenna to a vibration table. The vibration frequency for airborne vibration testing is usually in the range of 10–2000 Hz. To meet the requirements of vibration testing, the minimum natural frequency of the testing fixture must be greater than the maximum vibration test frequency of 2000 Hz. Because the vibration testing fixture must both secure the antenna and meet the natural frequency requirements, existing fixtures are large and bulky, making manufacturing, transportation, and installation difficult, and resulting in high operating costs. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a vibration testing fixture for instrument antennas, which can solve both the problem of fixing the instrument antenna to the vibration table in vibration testing and the problem of miniaturization and weight reduction of the testing fixture.

[0004] The present invention adopts the following technical solution: An improved vibration testing fixture for a transducer antenna includes a base and a support frame. The base includes a platform with fixing holes and a recess. The base is fixed to a vibration table using bolts installed in the fixing holes. A base is located adjacent to the platform and the recess, and fixing holes are provided on the base. The support frame includes a frame with mounting holes and an opening area. The frame is fixed to the base using bolts installed in the mounting holes and the fixing holes on the base. A protrusion is located adjacent to the opening area and has a through hole. The transducer antenna is fixed to the protrusion using a plate nut and screws installed in the through hole. After the transducer antenna is fixed, it does not interfere with any other components of the fixture outside the protrusion.

[0005] Furthermore, the countertop is hexagonal in shape and made of aluminum alloy.

[0006] Furthermore, threaded holes are provided on the two opposite side walls of the tabletop, and the handle is fixed to the side wall of the tabletop by a combination screw installed in the threaded holes, with the handle forming a certain angle with the bottom surface of the tabletop.

[0007] Furthermore, the sinking trough is approximately prismatic in shape, with holes and sinking trough holes provided inside. The holes are located at the center of the platform, and the base is fixed to the vibration table by bolts installed in the sinking trough holes. The sinking depth of the sinking trough holes is greater than the height of the bolt heads.

[0008] Furthermore, the base is set at a certain tilt angle so that the tilt angle of the instrument antenna on the tooling is the same as the tilt angle of the upper-mounted aircraft.

[0009] Furthermore, the frame has an approximately prismatic shape and is made of aluminum alloy.

[0010] Furthermore, threaded holes are provided on the two opposite side walls of the frame, and the handle is fixed to the side wall of the frame by a combination screw installed in the threaded holes, with the handle and the bottom surface of the frame forming a certain angle.

[0011] Furthermore, a rubber gasket is placed between the instrument antenna and the protrusion, and the rubber gasket is attached to the protrusion.

[0012] Furthermore, through holes are provided on the rubber gasket, with the number of through holes being the same as the number of through holes on the protrusion, and their positions being opposite.

[0013] Furthermore, the center of the support plate nut is aligned with the center of the through hole.

[0014] The beneficial effects of this utility model are: The tooling disclosed in this utility model can meet the testing requirements of the instrument antenna in a harsh vibration environment, and has the advantages of small size, light weight, simple structure, low processing cost and convenient operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the tooling base disclosed in this utility model; Figure 2 This is a schematic diagram of the tooling base after the handle is installed, as disclosed in this utility model. Figure 3 This is a schematic diagram of the tooling base disclosed in this utility model installed on a vibration table; Figure 4 This is a schematic diagram of the tooling support frame disclosed in this utility model; Figure 5 This is a schematic diagram of the tooling support frame disclosed in this utility model after the instrument antenna is installed; Figure 6 This is a schematic diagram of the tooling disclosed in this utility model after the instrument antenna is installed; Figure 7 This is a schematic diagram of the tooling disclosed in this utility model, after the instrument antenna is installed on the vibration table; Figure 8 This is a cloud map showing the inherent frequency calculation of the tooling disclosed in this utility model.

[0016] Figure label: 1-Base, 101-Tabletop, 102-Base, 103-Groove, 104-Hole, 105-Fixing Hole, 106-Groove Hole, 107-Fixing Hole, 108-Threaded Hole, 109-Heading Marker, 110-Outer Edge of Base, 111-Inner Edge of Base, 12-Handle, 13-Combination Screw, 2-Support Frame, 21-Frame, 201-Mounting Hole, 202-Opening Area, 203-Through Hole, 22-Protrusion, 23-Handle, 24-Leg, 25-Bolt, 26-Panel Nut, 27-Screw, 4-Aircraft Antenna, 401-Outer Outer Contour of Overlapping Edge, 402-Outer Cover, 404-Aviation Socket, 5-Vibration Table, 6-Bolt, 7-Bolt. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] Example 1: This example discloses a vibration testing fixture for a device antenna, used to fix the device antenna to a vibration table.

[0019] like Figure 6 As shown, the fixture includes a base 1 and a support frame 2, as... Figure 1 As shown, the base includes a table 101, which is hexagonal in shape and made of aluminum alloy, and can be manufactured by machine tool milling.

[0020] Fixing holes 105 and recesses 103 are provided on the table surface, and 14 fixing holes are provided around the outer edge of the table surface, such as... Figure 3 As shown, the base is fixed to the vibration table by bolts 6 installed in the fixing holes. The hole spacing of the fixing holes corresponds to the hole spacing of the vibration table to ensure that the bolts can pass through the fixing holes and be fixed to the vibration table 5. The spacing between adjacent holes is usually 100mm.

[0021] like Figure 2 As shown, two threaded holes 108 are respectively provided on the two opposite side walls of the tabletop. Two handles 12 are fixed to the two side walls of the tabletop by combination screws 13 installed in the threaded holes. The handles form a certain angle with the bottom surface of the tabletop. The purpose of the angle is to prevent the handles from sticking to the vibration table, so as to avoid difficulty in gripping the handles during operation and affecting the disassembly and assembly of the base.

[0022] Set a heading indicator 109 in the upper right corner of the table. The heading indicator 109 includes an arrow and the word "heading". The direction of the arrow is consistent with the heading of the instrument panel antenna.

[0023] The trough is approximately prismatic in shape to match the outer contour of the overlapping edge of the instrument panel antenna. Holes 104 and a ring of trough holes 106 are provided within the trough; the holes are located at the center of the platform, serving for positioning and weight reduction. The base is fixed to the vibration table using bolts installed in the trough holes; the depth of the trough holes is greater than the height of the bolt heads.

[0024] The groove must accommodate the outer casing of the instrument panel antenna. The inner side of the groove must be larger than the outer contour of the overlapping edge of the instrument panel antenna, with a gap of at least 5mm between them. The depth of the groove must be greater than the thickness of the outer casing of the instrument panel antenna, with a gap of at least 5mm between them.

[0025] A base 102 is installed at the junction of the settling tank and the platform. A ring of fixing holes 107 is provided on the base. The purpose of the fixing holes is to fix the support frame to the base. Figure 5 As shown, the inner edge 111 of the base is larger than the outer contour 401 of the overlapping edge of the antenna. After the antenna is fixed on the fixture, there is a gap of about 5mm between the inner edge of the base and the outer contour of the overlapping edge of the antenna. The purpose of the gap is to prevent friction between the base and the outer contour of the overlapping edge of the antenna during vibration.

[0026] The base is set at a certain tilt angle so that the tilt angle of the instrument antenna on the tooling is the same as the tilt angle of the aircraft on the upper part.

[0027] like Figure 4 As shown, the support frame includes a frame 21, and an opening area 202 is provided on the inner side of the frame. The opening area is set according to the shape of the instrument antenna to ensure that it does not interfere with the instrument antenna.

[0028] A ring of mounting holes 201 is provided on the outside of the frame. The frame is fixed to the base by bolts 7 installed in the mounting holes of the frame and the fixing holes of the base. The outer edge of the frame and the outer edge 110 of the base are consistent in size and shape.

[0029] The frame is approximately prismatic in shape and is made of aluminum alloy. Threaded holes are provided on two opposite side walls of the frame. Two handles 23 are fixed to the two side walls of the frame by combination screws installed in the threaded holes, with the handles forming a certain angle with the bottom surface of the frame.

[0030] A protrusion 22 is provided at the junction of the frame and the opening area, and a ring of through holes 203 is provided on the protrusion. The position of the through holes corresponds to the position of the antenna holes on the instrument panel. Figure 7 As shown, the instrument antenna 4 is fixed to the protrusion by the plate nut 26 and screw 27 installed on the through hole. The center of the plate nut is consistent with the center of the through hole, and the number of plate nuts is the same as the number of holes of the instrument antenna.

[0031] Once the instrument panel antenna is fixed in place, it does not interfere with any other components outside the protruding part of the fixture. The outer cover 402 of the instrument panel antenna is approximately prismatic in shape, and it is exposed outside the fixture with its direction facing upwards. The aviation socket 404 of the instrument panel antenna is located on the bottom surface of the outer cover.

[0032] A rubber gasket is placed between the instrument antenna and the protrusion. The rubber gasket is adhesive on one side and is attached to the protrusion.

[0033] The shape of the rubber gasket is designed according to the antenna overlap area of ​​the device. The rubber gasket serves to fill the gap between the antenna overlap area and the protrusion, reducing friction on the contact surface. A ring of through holes is provided on the rubber gasket, with the number of through holes being the same as the number of through holes on the protrusion, and their positions being opposite.

[0034] During tooling installation, first fix the base to the vibration table with bolts, and then fix the support frame of the upper device antenna to the base with bolts.

[0035] To facilitate the mounting of the instrument panel antenna onto the support frame, first install a cylindrical support leg 24 at each of the four diagonal mounting holes on the frame. The length of the support leg is greater than the total height of the instrument panel antenna. A threaded hole is provided at one end of each support leg to secure it to the mounting hole on the frame using bolts 25, with the handle facing the support leg side. After mounting the instrument panel antenna onto the support frame, remove the support legs and bolts.

[0036] The vibration frequency of the tooling is controlled within the range of 10 to 2000 Hz, and it is suitable for instrument antennas weighing ≤15 kg. Figure 8 As shown, the first six natural frequencies of the tooling are 2121.9Hz, 2129.2Hz, 2176.4Hz, 2187.6Hz, 2188.1Hz and 2436.0Hz, respectively, and the calculated load of the tooling is 15kg.

Claims

1. A vibration testing fixture for instrument antennas, characterized in that: The device includes a base and a support frame. The base includes a platform with fixing holes and a recess. The base is fixed to a vibration table by bolts installed in the fixing holes. A base is provided at the junction of the recess and the platform, and fixing holes are provided on the base. The support frame includes a frame with mounting holes and an opening area. The frame is fixed to the base by bolts installed in the mounting holes of the frame and the fixing holes of the base. A protrusion is provided at the junction of the frame and the opening area, and a through hole is provided on the protrusion. The device antenna is fixed to the protrusion by a plate nut and screws installed in the through hole. After the device antenna is fixed, it does not interfere with other parts of the fixture outside the protrusion.

2. The vibration testing fixture for a device antenna according to claim 1, characterized in that: The countertop is hexagonal in shape and made of aluminum alloy.

3. The vibration testing fixture for a device antenna according to claim 1, characterized in that: Threaded holes are provided on the two opposite side walls of the countertop. The handle is fixed to the side wall of the countertop by a combination screw installed in the threaded holes, and the handle is at a certain angle to the bottom surface of the countertop.

4. The vibration testing fixture for a device antenna according to claim 1, characterized in that: The settling tank is approximately prismatic in shape. Holes and settling holes are provided inside the settling tank. The holes are located at the center of the platform. The base is fixed to the vibration table by bolts installed in the settling holes. The settling depth of the settling holes is greater than the height of the bolt heads.

5. The vibration testing fixture for a device antenna according to claim 1, characterized in that: The base is set at a certain tilt angle so that the tilt angle of the instrument antenna on the tooling is the same as the tilt angle of the aircraft on the upper part.

6. The vibration testing fixture for a device antenna according to claim 1, characterized in that: The frame is approximately prismatic in shape and is made of aluminum alloy.

7. The vibration testing fixture for a device antenna according to claim 1, characterized in that: Threaded holes are provided on the two opposite side walls of the frame. The handle is fixed to the side wall of the frame by a combination screw installed in the threaded hole, and the handle is at a certain angle to the bottom surface of the frame.

8. The vibration testing fixture for a device antenna according to claim 1, characterized in that: A rubber gasket is placed between the instrument antenna and the protrusion, and the rubber gasket is attached to the protrusion.

9. The vibration testing fixture for a device antenna according to claim 8, characterized in that: Through holes are provided on the rubber gasket, and the number of through holes is the same as the number of through holes on the protrusion, and their positions are opposite.

10. The vibration testing fixture for a device antenna according to claim 1, characterized in that: The center of the support plate nut should be aligned with the center of the through hole.

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