A three-axis turntable for radar testing

Abstract

This utility model discloses a three-axis turntable for radar testing, belonging to the technical field of three-axis turntables. It includes a turntable assembly and a torque motor. The turntable assembly includes a turntable base, a first rotating shaft frame connected to the rotating end of the turntable base, a second rotating shaft frame rotatably connected inside the first rotating shaft frame, and a support platform rotatably connected to the top of the second rotating shaft frame. A positioning assembly includes a positioning shaft, a threaded rod fixedly connected to the bottom of the positioning shaft, and a hand-tightening nut threaded onto the external thread of the threaded rod. The positioning shaft engages with the interior of a limiting groove. Through the cooperation of the positioning assembly and the reinforcing assembly, the positioning assembly can slide flexibly within the limiting groove of the support platform, achieving lateral contact with radar bases of different sizes. Simultaneously, the reinforcing assembly presses and positions the radar base, improving the stability of the radar installation.

Description

Technical Field

[0001] This utility model relates to the field of three-axis turntable technology, specifically a three-axis turntable for radar testing. Background Technology

[0002] A radar test three-axis turntable is a device used for testing radar antennas. It is mainly used to simulate the three-dimensional motion of a carrier and provide a near-realistic motion environment for loads such as radar antennas. This turntable usually consists of two parts: a mechanical platform and a measurement and control system. The platform adopts a high-rigidity structure and can realize three-axis positioning and rate reference for load testing and experimentation.

[0003] An investigation revealed that a Chinese utility model patent (publication number: CN215910630U) discloses a compact three-axis turntable, comprising a base and an outer frame. The base is a hollow columnar structure, and the outer frame is U-shaped, with its bottom connected to the base. The outer frame rotates horizontally relative to the base. A rotating part is supported on the outer frame, and a radar mounting component for installing a radar detector is fixed on the rotating part. The rotating part drives the radar mounting component to pitch relative to the outer frame. A torque motor is fixed inside the base, situated within the base and outer frame. The stator of the torque motor is fixed to the base, and the rotor of the torque motor is connected to the outer frame. The technical solution provided by this utility model facilitates installation. Installing the motor within the outer frame significantly reduces the turntable's center height, occupies less space, and has a more compact structure. When used as a vehicle-mounted turntable, it has a lower center height, facilitating road driving. It also reduces the impact of the transmission mechanism on the shaft system accuracy, demonstrating good applicability.

[0004] Although the aforementioned patent achieves three-axis rotation testing, its radar mounting component still uses bolts to install and position the radar. Therefore, the upper array has threaded holes. However, this fixing method has certain limitations. It requires the positioning holes on the bottom support of the radar to be aligned with the threaded holes on the radar mounting component. As a result, the device cannot effectively adapt to different models of radar for installation and positioning when in use, thus reducing its installation adaptability and flexibility.

[0005] Therefore, this utility model provides a three-axis turntable for radar testing to solve the above problems. Utility Model Content

[0006] (a) Technical problems to be solved

[0007] This invention provides a three-axis turntable for radar testing, aiming to solve the problems mentioned in the background art.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution: a three-axis turntable for radar testing, comprising a turntable assembly and a torque motor. The turntable assembly includes a turntable base, a first rotating shaft frame connected to the rotating end of the turntable base, a second rotating shaft frame rotatably connected inside the first rotating shaft frame, and a support platform rotatably connected to the top of the second rotating shaft frame. Four sets of limiting grooves are formed on the circumference of the support platform. The torque motor is used for the rotation drive of the first rotating shaft frame, the second rotating shaft frame, and the support platform.

[0010] The positioning component includes a positioning shaft, a threaded rod fixedly connected to the bottom of the positioning shaft, a hand-tightening nut connected to the external thread of the threaded rod, the positioning shaft engaging with the inside of the limiting groove, and the hand-tightening nut abutting against the lower surface of the support platform, and the contact end between the positioning shaft and the upper surface of the support platform is provided with anti-slip texture.

[0011] A hardening component is disposed above the positioning component and is used for hardening radar positioning.

[0012] As a preferred technical solution of this application, the torque motor is provided in three sets corresponding to the first rotating shaft frame, the second rotating shaft frame and the support platform, and the three sets of torque motors are respectively connected to the inside of the second rotating shaft frame, the outer wall of the first rotating shaft frame and the inside of the turntable base.

[0013] As a preferred technical solution of this application, the diameter of the positioning shaft is greater than the width of the limiting groove, the diameter of the threaded rod is equal to the width of the limiting groove, and the reinforcing component includes a guide sleeve, which is integrally disposed on the upper surface of the positioning shaft.

[0014] As a preferred technical solution of this application, the top of the guide sleeve is fixedly connected to a limiting plate, the inside of the guide sleeve is slidably connected to a guide ring, the top of the guide ring is fixedly connected to a hexagonal column, the bottom of the guide ring is abutted against a spring, and the top of the hexagonal column is fixedly connected to a sleeve via a round shaft.

[0015] As a preferred technical solution of this application, the spring is also located inside the guide sleeve, and the bottom of the spring abuts against the upper surface of the positioning shaft. The center of the limiting plate is provided with a hexagonal through hole adapted to the insertion of a hexagonal prism. The outer diameter of the sleeve is equal to the outer diameter of the positioning shaft, and the sleeve is slidably sleeved on the outside of the guide sleeve.

[0016] As a preferred technical solution of this application, the outer wall of the sleeve is integrally formed with a threaded cylinder, the inner thread of the threaded cylinder is connected to a screw, and the bottom of the screw is fixedly connected to a pressure plate.

[0017] (III) Beneficial Effects

[0018] The beneficial effects of this application are as follows:

[0019] 1. This utility model, through the setting of positioning components, allows the positioning components to slide flexibly inside the upper limit groove of the support platform, thereby enabling the four sets of positioning components to flexibly adjust the spacing. Through the adjustment of their positions, the side abutment of the radar base is achieved, thereby completing the auxiliary installation and positioning of the radar. It also has higher adaptability and can effectively adapt to radar bases of different sizes for abutment and positioning.

[0020] 2. This utility model, through the setting of reinforcement components, after the positioning components abut against and position the side of the radar base, adjusts the position of the screw and the pressure plate, and presses and positions the upper surface of the support lug of the radar base by the pressure plate, thereby achieving the compression and reinforcement treatment of the radar base, ensuring the stability of the radar installation and preventing it from tilting and falling off. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 This is a cross-sectional view of the positioning component of this utility model in the engaged state.

[0023] Figure 3 This is an exploded structural diagram of the positioning component and the reinforcement component of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall structure of the turntable assembly of this utility model;

[0025] Figure 5 This is a schematic diagram of the overall structure of the positioning component and the reinforcement component of this utility model.

[0026] In the picture:

[0027] 1. Turntable assembly; 11. Turntable base; 12. First rotating shaft frame; 13. Second rotating shaft frame; 14. Bearing platform; 15. Limiting groove; 2. Torque motor; 3. Positioning assembly; 31. Positioning shaft; 32. Threaded rod; 33. Hand-tightening nut; 34. Anti-slip texture; 4. Reinforcing assembly; 41. Guide sleeve; 42. Limiting plate; 43. Guide ring; 44. Spring; 45. Hexagonal column; 46. Sleeve; 47. Threaded cylinder; 48. Screw; 49. Pressure plate. Detailed Implementation

[0028] 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.

[0029] like Figure 1-5 As shown, this utility model provides a three-axis turntable for radar testing, including a turntable assembly 1 and a torque motor 2. The turntable assembly 1 includes a turntable base 11, a first rotating shaft frame 12 connected to the rotating end of the turntable base 11, a second rotating shaft frame 13 rotatably connected inside the first rotating shaft frame 12, and a support platform 14 rotatably connected to the top of the second rotating shaft frame 13. The support platform 14 has four sets of limiting grooves 15 circumferentially formed on its surface. The torque motor 2 is used to drive the rotation of the first rotating shaft frame 12, the second rotating shaft frame 13, and the support platform 14. A positioning assembly 3 is also included, which includes a positioning shaft 31, the bottom of which is fixed. A threaded rod 32 is fixedly connected, and a hand-tightening nut 33 is connected to the external thread of the threaded rod 32. The positioning shaft 31 is engaged with the inside of the limiting groove 15, and the hand-tightening nut 33 abuts against the lower surface of the support platform 14. A reinforcing component 4 is set above the positioning component 3 and is used for reinforcing the radar positioning. Through the setting of the positioning component 3 and the reinforcing component 4, the device can improve the adaptability of radar installation. The positioning component 3 abuts against the side of the radar, and the reinforcing component 4 squeezes and positions the radar base to achieve stable installation of the radar.

[0030] Furthermore, three sets of torque motors 2 are provided for the first rotating shaft frame 12, the second rotating shaft frame 13, and the support platform 14. The three sets of torque motors 2 are respectively connected to the inside of the second rotating shaft frame 13, the outer wall of the first rotating shaft frame 12, and the inside of the turntable base 11. The torque motors 2 control the rotation of the first rotating shaft frame 12, the second rotating shaft frame 13, and the support platform 14, respectively, to realize the three-axis rotation adjustment of the device and meet the requirements of radar signal testing at different angles.

[0031] Furthermore, the diameter of the positioning shaft 31 is greater than the width of the limiting groove 15, and the diameter of the threaded rod 32 is equal to the width of the limiting groove 15. The contact end between the positioning shaft 31 and the upper surface of the support platform 14 is provided with anti-slip texture 34. The reinforcing component 4 includes a guide sleeve 41, which is integrally set on the upper surface of the positioning shaft 31. Through the compression of the anti-slip texture 34 with the upper surface of the support platform 14, the firmness of the positioning shaft 31 installation can be improved. Through the friction and compression of the anti-slip texture 34, the stability of the positioning shaft 31 is improved, and the contact and limiting of the radar base side is achieved. At the same time, the positioning shaft 31 is prevented from being compressed, which would cause the threaded rod 32 to slide inside the limiting groove 15.

[0032] Furthermore, a limiting plate 42 is fixedly connected to the top of the guide sleeve 41, a guide ring 43 is slidably connected inside the guide sleeve 41, and a hexagonal prism 45 is fixedly connected to the top of the guide ring 43. A spring 44 abuts against the bottom of the guide ring 43, and a sleeve 46 is fixedly connected to the top of the hexagonal prism 45 through a round shaft. The spring 44 is also inside the guide sleeve 41, and the bottom of the spring 44 abuts against the upper surface of the positioning shaft 31. A hexagonal through hole adapted to the insertion of the hexagonal prism 45 is opened in the center of the limiting plate 42. The outer diameter of the sleeve 46 is equal to the outer diameter of the positioning shaft 31, and the sleeve 46 is slidably sleeved on the outside of the guide sleeve 41. By pressing the sleeve 46, the position of the hexagonal prism 45 moves down, thereby releasing the insertion and positioning of the limiting plate 42 and the hexagonal prism 45. The distribution angle of the threaded cylinder 47 can be adjusted by rotating the sleeve 46. When the pressing position of the pressure plate 49 is restricted, the compatibility of its pressing can be improved by adjusting its angle.

[0033] Furthermore, the outer wall of the sleeve 46 is integrally formed with a threaded cylinder 47, and the threaded cylinder 47 is internally threaded with a screw 48. The bottom of the screw 48 is fixedly connected with a pressure plate 49. Through the threaded connection between the threaded cylinder 47 and the screw 48, the pressure plate 49 is displaced when the screw 48 is rotated, thereby compressing the upper surface of the radar base, which in turn makes the radar base and the support platform 14 stably cooperate and improves the firmness of the radar installation.

[0034] Working principle: First, the hand-tightening nut 33 is loosened by rotating it, allowing the positioning component 3 and the reinforcing component 4 to slide flexibly. Then, the radar is placed above the support platform 14. By sliding the positioning shaft 31, the positioning shaft 31 abuts against the side of the radar base. Through the threaded connection between the hand-tightening nut 33 and the threaded rod 32, the positioning shaft 31 provides stable compression to the upper surface of the support platform 14. Then, the sleeve 46 is pressed and rotated, causing the pressure plate 49 to rotate above the radar base. By rotating the screw 48, the pressure plate 49 abuts against the radar base, thereby further improving the firmness of the radar installation by compressing the radar base with the pressure plate 49.

[0035] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A three-axis turntable for radar testing, characterized in that: The system includes a turntable assembly (1) and a torque motor (2). The turntable assembly (1) includes a turntable base (11). The rotating end of the turntable base (11) is connected to a first rotating shaft frame (12). The interior of the first rotating shaft frame (12) is rotatably connected to a second rotating shaft frame (13). The top of the second rotating shaft frame (13) is rotatably connected to a support platform (14). The support platform (14) has four sets of limiting grooves (15) on its circumference. The torque motor (2) is used to drive the rotation of the first rotating shaft frame (12), the second rotating shaft frame (13), and the support platform (14). The positioning component (3) includes a positioning shaft (31), a threaded rod (32) is fixedly connected to the bottom of the positioning shaft (31), a hand-tightening nut (33) is connected to the external thread of the threaded rod (32), the positioning shaft (31) is engaged with the inside of the limiting groove (15), and the hand-tightening nut (33) abuts against the lower surface of the support platform (14), and the contact end between the positioning shaft (31) and the upper surface of the support platform (14) is provided with anti-slip texture (34); A reinforcement component (4) is disposed above the positioning component (3) and is used for reinforcement processing of radar positioning.

2. The three-axis turntable for radar testing according to claim 1, characterized in that: The torque motor (2) is provided in three sets corresponding to the first rotating shaft frame (12), the second rotating shaft frame (13) and the support platform (14), and the three sets of torque motors (2) are respectively connected to the inside of the second rotating shaft frame (13), the outer wall of the first rotating shaft frame (12) and the inside of the turntable base (11).

3. A three-axis turntable for radar testing according to claim 2, characterized in that: The diameter of the positioning shaft (31) is greater than the width of the limiting groove (15), the diameter of the threaded rod (32) is equal to the width of the limiting groove (15), and the reinforcing component (4) includes a guide sleeve (41), which is integrally disposed on the upper surface of the positioning shaft (31).

4. A three-axis turntable for radar testing according to claim 3, characterized in that: The top of the guide sleeve (41) is fixedly connected to a limiting plate (42), the inside of the guide sleeve (41) is slidably connected to a guide ring (43), and the top of the guide ring (43) is fixedly connected to a hexagonal column (45). The bottom of the guide ring (43) abuts against a spring (44), and the top of the hexagonal column (45) is fixedly connected to a sleeve (46) via a round shaft.

5. A three-axis turntable for radar testing according to claim 4, characterized in that: The spring (44) is also inside the guide sleeve (41), and the bottom of the spring (44) abuts against the upper surface of the positioning shaft (31). The center of the limiting plate (42) is provided with a hexagonal through hole adapted to the insertion of the hexagonal column (45). The outer diameter of the sleeve (46) is equal to the outer diameter of the positioning shaft (31), and the sleeve (46) is slidably sleeved on the outside of the guide sleeve (41).

6. A three-axis turntable for radar testing according to claim 5, characterized in that: The outer wall of the sleeve (46) is integrally formed with a threaded cylinder (47), and the threaded cylinder (47) is internally threaded with a screw (48), and a pressure plate (49) is fixedly connected to the bottom of the screw (48).

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