A radar antenna test stand

Abstract

The utility model belongs to the field of aviation equipment repair, especially a radar antenna test stand, including fixed frame and hanger, fixed frame is used for supporting and installing hanger, hanger is used for installing radar antenna, wherein hanger includes hook, vertical rod and support block, hook is fixed in vertical rod upper end, support block is fixed in vertical rod lower part, compared with prior art, the utility model discloses the design through fixed frame and hanger, installs hanger on radar antenna before hoisting, just can realize the installation of hanger and fixed frame with the hoisting of radar antenna to fixed frame nearby and put down, further, the radar antenna is placed on the test table efficiently and safely, eliminates the disadvantage that the installation hole is very difficult to align when fixing the radar antenna on the fixed frame directly through screw.

Description

Technical Field

[0001] This utility model belongs to the field of aviation equipment repair, and in particular is a radar antenna test rack. Background Technology

[0002] Radar antennas are crucial aviation equipment, and large anechoic chambers are common testing environments for them. These chambers typically feature adjustable horizontal and vertical test benches to ensure parallel calibration of the scanning paths between the antenna and the sensor. During antenna testing, a specialized mounting device can be fabricated based on the product's installation and connection locations and the distribution of threaded holes on the test bench. This device is then installed onto the test bench to ensure the antenna is securely mounted and fixed on the test bench. Figure 1 (As shown).

[0003] Due to the antenna's large size and heavy weight, mounting it onto a dedicated fixing device requires the use of lifting equipment. Considering the product's length exceeds 6 meters, special attention must be paid to the product's stress balance during lifting to ensure its stability (e.g., ...). Figure 2 (As shown).

[0004] Since the four connection holes on the top of the antenna are all used to connect with the lifting device during hoisting, the antenna cannot be directly connected with screws when connecting to the fixing device, as this would cause interference. If only the two outer holes are hoisted, it will cause the antenna to tilt, which will bring many inconveniences to the antenna installation.

[0005] If a flexible sling is used to support the antenna from below during hoisting, the transceiver unit installed on the antenna is likely to be damaged during the hoisting process, resulting in a safety accident. Furthermore, the hoisting process involves working at height, and the installation of screws requires extremely high control over the antenna's height and position. The screws can only be installed if the antenna mounting holes are coaxial with the mounting holes of the fixing device, making the operation very difficult. Utility Model Content

[0006] The purpose of this utility model is to provide a radar antenna test frame. Through the design of the fixed frame and the hanging frame, the hanging frame is installed on the radar antenna before hoisting. The radar antenna only needs to be hoisted to the vicinity of the fixed frame and then put down to realize the installation of the hanging frame and the fixed frame. In this way, the radar antenna can be placed on the test platform safely and efficiently, eliminating the disadvantage of the difficulty in aligning the mounting holes when the radar antenna is directly fixed to the fixed frame with screws after hoisting.

[0007] The technical solution to achieve the purpose of this utility model is as follows: a radar antenna test frame, comprising: a fixed frame and a hanging frame; the fixed frame is used to support and install the hanging frame; the hanging frame includes a hook, a vertical rod, and a support block; the hook is fixed at the upper end of the vertical rod, and the support block is fixed at the lower part of the vertical rod; the hook is used to enable quick installation of the hanging frame and the fixed frame when the radar antenna is lowered from above; the vertical rod is used to fix the hook and the support block, so that the radar antenna can be fixedly connected to both the hook and the support block at the same time; the support block is used to fix the radar antenna to the hanging frame, and the boss below it can support the radar antenna.

[0008] Compared with the prior art, the significant advantages of this utility model are:

[0009] (1) The radar antenna test rack designed in this utility model is easy to use. Before hoisting, the rack is installed on the radar antenna. The radar antenna is hoisted to the vicinity of the fixed frame and slowly lowered to realize the installation of the rack and the fixed frame. In this way, the radar antenna is safely and efficiently placed on the test platform, eliminating the disadvantage that when the radar antenna is directly fixed to the fixed frame by screws during hoisting, the mounting holes are difficult to align.

[0010] (2) In the radar antenna test rack designed in this utility model, the inclined surface set on the hook not only has a guiding function during the lowering process, but also allows the hanger and the fixed frame to fit naturally after being fully lowered.

[0011] (3) In the radar antenna test frame designed in this utility model, the process boss above the hook, the upper connection hole and the lifting process hole facilitate the hoisting of the radar antenna and eliminate the interference between the lifting position and the installation position.

[0012] (4) In the radar antenna test frame designed in this utility model, the design of the waist-shaped groove on the side frame and the vertical rod makes the connection between the fixed frame and the hanging frame compatible, and the connection of the components can be realized without complete coaxial alignment, which reduces the difficulty of installation. Attached Figure Description

[0013] Figure 1 Schematic diagram of the installation and fixing structure of the radar antenna on the test bench;

[0014] Figure 2 Schematic diagram of radar antenna hoisting;

[0015] Figure 3 A schematic diagram of the side view of a novel radar antenna test fixture;

[0016] Figure 4 A schematic diagram of the fixing frame structure of a novel radar antenna test fixture;

[0017] Figure 5A schematic cross-sectional view of the mounting structure of a novel radar antenna test fixture;

[0018] Figure 6 A schematic diagram of the hoisting of a new type of radar antenna test fixture;

[0019] Figure 7 A schematic diagram of the cross-sectional structure of a hook for a novel radar antenna test fixture;

[0020] Figure 8 A schematic diagram of the support block structure of a novel radar antenna test fixture. Detailed Implementation

[0021] The terminology used in this utility model is for illustrative purposes only and is not intended to limit the scope of the utility model. The following description, in conjunction with the appendix, further clarifies this utility model. Figure 1-8 The following is a detailed description of some embodiments of this utility model.

[0022] A novel radar antenna test fixture includes: a fixed frame 1 and a hanging frame 2.

[0023] The fixing frame 1 is formed by welding square tube profiles. Below it is the bottom frame 1-1, and the side frame 1-2 is located above the bottom frame 1-1. Two diagonal rods 1-3 are welded between the side frame 1-2 and the bottom frame 1-1.

[0024] The base frame 1-1 is made of square tubing welded into a square shape. Connecting holes are machined on the base frame 1-1 for fixing the bracket 1 to the test bench.

[0025] The side frame 1-2 is formed by welding square tubing and is vertically welded above the bottom frame 1-1. The four corners of the rectangular structure above the side frame 1-2 are machined with horizontal slots for fixed connection with the hanger 2. These slots at the four corners of the side frame 1-2 facilitate the connection of hooks to the mounting bracket. As long as the hole on the end face of the hook is within the left and right range of the slot, the hook can be fixed to the mounting bracket with screws, without alignment requirements.

[0026] Diagonal brace 1-3 is welded between side frame 1-2 and bottom frame 1-1 to form a triangular structure, which is used to enhance the structural stability of the fixing frame 1.

[0027] The square tube is a hollow square tube profile, which ensures sufficient structural strength while reducing its own weight.

[0028] The bracket 2 includes a hook 2-1, a vertical rod 2-2, and a support block 2-3. The hook 2-1 is welded to the upper end of the vertical rod 2-2, and the support block 2-3 is welded to the lower part of the vertical rod 2-2.

[0029] Hook 2-1 includes: upper connecting hole 2-1-1, process boss 2-1-2, lifting process hole 2-1-3, rear connecting hole 2-1-4, and first threaded hole 2-1-5.

[0030] The upper connecting hole 2-1-1 is a threaded through hole used to install screws when fixing the bracket 2 to the radar antenna; a process boss 2-1-2 is provided above the hook 2-1, and a lifting process hole 2-1-3 is machined on the side of the process boss 2-1-2 for lifting the radar antenna.

[0031] A trapezoidal groove is machined on the lower left side of hook 2-1. The width of the base of the trapezoidal groove is the same as the size of the square tube used in the fixing frame 1. The left side of the trapezoidal groove is inclined so that when the hanger 2 is installed from above onto the fixing frame 1, the upper and right sides of the trapezoidal groove naturally fit into the fixing frame 1. A rear connecting hole 2-1-4 is machined on the left side of the trapezoidal groove, and a first threaded hole 2-1-5 is machined on the right side of the trapezoidal groove. When fixing the hanger 2, the screw can be inserted from the rear connecting hole 2-1-4 and screwed into the first threaded hole 2-1-5. A rectangular groove is machined on the lower right side of hook 2-1. The rectangular groove increases the contact surface when the hook 2-1 is welded to the vertical rod 2-2, making the welding more reliable. At the same time, the rectangular groove can reduce the weight of hook 2-1.

[0032] The vertical rod 2-2 is made of square tubing, with a boss machined on its top. The width and height of the boss are determined based on the dimensions of the rectangular groove on the lower right of 2-1. A waist-shaped groove is machined at the bottom of the vertical rod 2-2 for the fixed connection between the bottom of the hanger 2 and the fixing frame 1. The distance from the center of the waist-shaped groove to the rear connecting hole 2-1-4 is the same as the distance between the upper and lower waist-shaped grooves of the side frame 1-2. Furthermore, the waist-shaped groove below the vertical rod 2-2 in the hanger 2 facilitates the connection between the lower end of the hanger and the fixing frame. As long as the hook 2-1 is correctly connected to the fixing frame 1, the connection between the lower end of the hanger and the fixing frame is 100% guaranteed, requiring no alignment.

[0033] The support block 2-3 has an L-shaped structure and is welded to the lower right of the vertical rod 2-2. The side of the boss has a second threaded hole 2-3-1, which is used to install screws when fixing the bracket 2 to the radar antenna. The distance between the second threaded hole 2-3-1 and the upper connecting hole 2-1-1 is the same as the distance between the upper and lower mounting holes of the radar antenna. The support block 2-3 has a support surface 2-3-2 at the bottom, which plays a supporting role during hoisting and can prevent the screws between the radar antenna and the bracket 2 from being subjected to shearing force.

[0034] The working process of the radar antenna test fixture disclosed in this invention is as follows:

[0035] Step 1: Fix the mounting bracket 1 to the test platform using screws.

[0036] Step 2: Install the two brackets 2 on both sides of the radar antenna 3 with screws. The inner connecting hole on the upper side of the radar antenna 3 is fixed to the upper connecting hole 2-1-1 with screws, and the connecting hole on the lower side of the radar antenna 3 is fixed to the second threaded hole 2-3-1 with screws. Before tightening the screws, press the support surface 2-3-2 against the lug end face where the connecting hole on the lower side of the radar antenna 3 is located, and support the antenna through the support surface 2-3-2.

[0037] Step 3: Use a four-point lifting tool to connect the two outer connecting holes of the radar antenna 3 and the lifting process holes 2-1-3 of the two left and right brackets 2 respectively.

[0038] Step 4: Use crane 4 to hoist radar antenna 3 to the vicinity of mounting frame 1. Hook 2-1 should be higher than the top of mounting frame 1.

[0039] Step 5: Gently pull the radar antenna 3 by hand so that the bracket 2 fits into the fixing frame 1, and so that the rear connecting hole 2-1-4 is positioned between the waist-shaped grooves above the fixing frame 1.

[0040] Step 6: Direct the crane to gently lower the radar antenna 3 so that the trapezoidal groove of the hook 2-1 hooks onto the top horizontal bar of the fixing frame 1.

[0041] Step 7: Insert screws into the first threaded hole 2-1-5 through the rear connecting hole 2-1-4, so that the brackets 2 at both ends are fixed to the fixing bracket 1.

[0042] Step 8: Pass screws through the waist-shaped groove (horizontal direction) below the fixing bracket 1 and the waist-shaped groove (vertical direction) of the hanging bracket 2, and secure them with nuts.

[0043] Step 9: Remove the 4-point lifting device. At this point, antenna performance testing can be performed.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A radar antenna test fixture, characterized in that, include: A fixed frame (1) and a hanging frame (2); the fixed frame (1) is used to support and install the hanging frame (2); the hanging frame (2) includes a hook (2-1), a vertical rod (2-2) and a support block (2-3); the hook (2-1) is fixed at the upper end of the vertical rod (2-2), and the support block (2-3) is fixed at the lower part of the vertical rod (2-2); the hook (2-1) is used to enable the hanging frame (2) and the fixed frame (1) to be quickly installed when the radar antenna (3) is lowered from above; the vertical rod (2-2) is used to fix the hook (2-1) and the support block (2-3) so that the radar antenna (3) can be fixedly connected to both the hook (2-1) and the support block (2-3) at the same time; the support block (2-3) is used to fix the radar antenna (3) to the hanging frame (2), and the boss below it can support the radar antenna (3).

2. The radar antenna test fixture according to claim 1, characterized in that, The fixing frame (1) includes a bottom frame (1-1), a side frame (1-2), and a diagonal rod (1-3). The bottom frame (1-1) is a frame structure, and the side frame (1-2) is vertically fixed above the bottom frame (1-1) to support the hanging frame (2). The two ends of the diagonal rod (1-3) are fixed between the side frame (1-2) and the bottom frame (1-1) respectively to form a triangular structure, which is used to enhance the structural stability of the fixing frame (1).

3. The radar antenna test fixture according to claim 2, characterized in that, The four corners of the rectangular structure above the side frame (1-2) are machined with horizontal waist-shaped grooves for fixed connection with the hanger (2).

4. The radar antenna test fixture according to claim 1, characterized in that, The hook (2-1) is provided with an upper connecting hole (2-1-1), a process boss (2-1-2), a lifting process hole (2-1-3), a rear connecting hole (2-1-4), and a first threaded hole (2-1-5); the upper connecting hole (2-1-1) is used to connect the bracket (2) and the radar antenna (3); a process boss (2-1-2) is provided above the hook (2-1), and a lifting process hole (2-1-5) is machined on the side of the process boss (2-1-2). 3) Used to connect with the lifting device for hoisting radar antennas; a trapezoidal groove is machined on the lower left of the hook (2-1) for contact with the fixing frame (1); a rear connection hole (2-1-4) and a first threaded hole (2-1-5) are machined on the side of the trapezoidal groove for fixing the fixing frame (1) and the hanging frame (2); a rectangular groove is machined on the lower part of the hook (2-1) for increasing the contact surface when the hook (2-1) is welded to the vertical rod (2-2).

5. The radar antenna test fixture according to claim 4, characterized in that, The vertical rod (2-2) has a boss on the top for contacting and engaging with the rectangular groove on the bottom of the hook (2-1); the vertical rod (2-2) has a waist-shaped groove on the bottom for fixing the bracket (2) to the fixed bracket (1).

6. The radar antenna test fixture according to claim 4, characterized in that, The support block (2-3) has an L-shaped structure and is welded to the lower right of the vertical rod (2-2). The side of the boss is machined with a second threaded hole (2-3-1) to realize the fixed connection between the bracket (2) and the radar antenna (3).

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