High-precision double-shaft test rotary table

Abstract

The utility model discloses a high-precision double-shaft test rotary table, and belongs to the technical field of double-shaft test rotary tables. The double-axis test rotary table comprises a U-shaped base, a workbench arranged on the U-shaped base, a Y-axis system assembly arranged on the U-shaped base and used for enabling the workbench to rotate, and an X-axis system assembly arranged in the U-shaped base and used for enabling the Y-axis system assembly to rotate. According to the high-precision double-shaft test rotary table, a control instruction can be sent to the measurement and control cabinet through the industrial personal computer according to test requirements, the measurement and control cabinet controls rotation of the Y-axis system assembly and the X-axis system assembly according to the instruction, and the angle sensor can feed back actual rotation angles of the Y-axis system assembly and the X-axis system assembly in real time. The measurement and control cabinet compares the actual angle with the target angle, and adjusts the rotation of the shaft system according to the deviation, thereby achieving the precise angle control and positioning, meeting the requirements of a high-precision test, and further improving the accuracy and reliability of the test.

Description

Technical Field

[0001] This application relates to the field of dual-axis test turntable technology, specifically a high-precision dual-axis test turntable. Background Technology

[0002] In today's era of rapid technological advancement, dual-axis test turntables play a crucial role in numerous fields, widely used in industries such as electronics and communications, aviation, aerospace science, 3D scanning, engraving, and machinery manufacturing. They are primarily used for the testing and calibration of various precision components, such as rate gyroscopes, conducting gyroscope rate experiments, multi-position pointing experiments, and roll experiments, serving as fundamental support equipment for related testing work.

[0003] Chinese utility model patent CN217687264U discloses a rotary multifunctional dual-axis test turntable. It uses a first electric push rod to drive the support base, stage, and the device under test (DUT) on it to move up and down, adapting to the rotational testing requirements of DUTs at different heights. However, it relies solely on motor-driven rotation and lacks an effective feedback mechanism. Since the motor itself does not have an automatic calibration function, without a feedback mechanism, precise angle control and positioning during rotation are difficult. Furthermore, the turntable's support base is directly and rigidly connected to the motor, with no restriction on its degrees of freedom. This makes the support base susceptible to rotation due to external forces when the product under test is mounted on it or when the turntable is transported, potentially causing unnecessary damage.

[0004] Therefore, this application provides a high-precision dual-axis test turntable to solve the above problems. Utility Model Content

[0005] This application provides a high-precision dual-axis test turntable, which aims to solve the problems mentioned in the background art, such as the lack of a feedback mechanism that makes it difficult for the motor to achieve precise angle control and positioning, and the fact that the bearing seat is directly rigidly connected to the motor and the degree of freedom is not restricted, making it easy to be damaged by external force rotation when installing the product under test or during transportation.

[0006] To achieve the above objectives, this application provides the following technical solution: a high-precision dual-axis test turntable, comprising a U-shaped base, a worktable disposed on the U-shaped base, a Y-axis system assembly disposed on the U-shaped base for rotating the worktable, and an X-axis system assembly disposed within the U-shaped base for rotating the Y-axis system assembly;

[0007] The dual-axis test turntable also includes an industrial control computer, a measurement and control cabinet, and angle sensors respectively installed on the Y-axis assembly and the X-axis assembly for measuring angles. The Y-axis assembly and the X-axis assembly are both connected to the output end of the measurement and control cabinet, and the two angle sensors are both connected to the input end of the measurement and control cabinet. The measurement and control cabinet is bidirectionally connected to the industrial control computer.

[0008] The U-shaped base and Y-axis assembly are equipped with pin components for locking the position of the Y-axis assembly. The combined design of the Y-axis and X-axis assemblies allows the worktable to rotate in two different directions. This dual-axis rotation capability provides the tested product with richer motion simulation scenarios, improving the accuracy and reliability of the test. Simultaneously, the control system consisting of the industrial control computer, the measurement and control cabinet, and the angle sensor forms a closed-loop feedback mechanism. The industrial control computer can send control commands to the measurement and control cabinet according to the test requirements. The measurement and control cabinet controls the rotation of the Y-axis and X-axis assemblies according to the commands, while the angle sensor provides real-time feedback on the actual rotation angles of the Y-axis and X-axis assemblies. The measurement and control cabinet compares the actual angle with the target angle and adjusts the rotation of the axes based on the deviation, thereby achieving precise angle control and positioning, meeting the requirements of high-precision testing, and further improving the accuracy and reliability of the test. The pin component design prevents the Y-axis assembly from rotating freely when the tested product is mounted on the worktable, facilitating the installation of the tested product. It also prevents the Y-axis assembly from rotating freely during transportation, avoiding unnecessary damage to the turntable when not in operation.

[0009] Preferably, to facilitate leveling the U-shaped base, the bottom of the U-shaped base is provided with a base plate arranged in a ring for contact with the ground. An inclined surface is fixedly provided on the base plate, and an inclined iron block for contacting the bottom of the base is slidably connected to the inclined surface. A lead screw is rotatably connected to the base plate, and the inclined iron block is screwed to the lead screw. By rotating the lead screw, the position of the inclined iron block on the inclined surface can be adjusted through the threaded engagement between the lead screw and the inclined iron block. Since the inclined iron block is in contact with the bottom of the U-shaped base, its position change can finely adjust the height and tilt angle of the U-shaped base, thereby achieving leveling and keeping the turntable in a horizontal state. This ensures the stability of the worktable during rotation and improves the accuracy of the test results.

[0010] Preferably, in order to facilitate the installation of different products for testing, the worktable is provided with threaded holes arranged in a ring array, and the diameters of the multiple threaded holes are different. The design of threaded holes with different diameters makes it convenient for operators to select appropriate threaded holes and bolts to fix the products on the worktable for testing according to different products, thereby improving the versatility and applicability of the turntable.

[0011] Preferably, to achieve the rotation of the worktable, the Y-axis system assembly includes an inner frame mounted on the U-shaped base, an inner shaft rotatably connected within the inner frame and fixedly connected to the bottom of the worktable, an inner ball bearing located within the inner frame at a position corresponding to the lower part of the inner shaft, and an inner torque motor fixedly installed at the bottom of the inner frame and fixedly connected to the inner ring of the inner ball bearing. The inner torque motor is connected to the output end of the control cabinet, and the outer ring of the inner ball bearing is fixedly connected to the bottom of the inner shaft. The rotation of the inner torque motor is transmitted to the inner shaft through the inner ball bearing, thereby driving the worktable to rotate, thus achieving control over the rotation angle of the worktable.

[0012] Preferably, to facilitate adjusting the distance between the counterweights and the inner frame according to the weight of the product, thereby achieving balance, the Y-axis assembly further includes a screw fixedly installed at the bottom of the inner frame, multiple counterweights sleeved on the screw, and nuts disposed on both sides of the multiple counterweights and screwed to the screw for locking the positions of the multiple counterweights. This design allows for the balancing of the Y-axis assembly when installing products of different weights; by moving the counterweights and locking their positions with the nuts, it helps eliminate rotational imbalance caused by uneven product weight, improving the stability of the turntable rotation and testing accuracy.

[0013] Preferably, to achieve the rotation of the Y-axis system assembly, the X-axis system assembly includes an outer shaft symmetrically rotatably disposed within the U-shaped base and fixedly connected to both sides of the inner frame, an outer ball bearing disposed within the U-shaped base corresponding to one of the outer shafts away from the inner frame, and an external torque motor fixedly mounted on the U-shaped base and fixedly connected to the inner ring of the outer ball bearing. The external torque motor is connected to the output end of the control cabinet, and the outer ring of the outer ball bearing is fixedly connected to one of the outer shafts. The rotation of the external torque motor is transmitted to the outer shaft through the outer ball bearing, thereby driving the inner frame and the worktable on the inner frame to rotate. It can be used in conjunction with the Y-axis system assembly to achieve control of the dual-axis rotation angle of the worktable.

[0014] Preferably, to facilitate locking or unlocking the Y-axis assembly, the pin assembly includes a sleeve fixedly installed on one side of the U-shaped base, a rod slidably connected within the sleeve, a fixing block fixedly installed on the inner frame corresponding to the sleeve, a socket on the fixing block for inserting the rod, a lever located on the outside of the sleeve and fixedly connected to the rod, and an arc-shaped guide groove on the sleeve for sliding the lever. This design allows the operator to slide the lever within the arc-shaped guide groove to insert or remove the rod from the socket on the fixing block, thus enabling locking and unlocking of the Y-axis assembly. The operation is simple and convenient.

[0015] This high-precision dual-axis test turntable, through the combined design of Y-axis and X-axis components, enables the worktable to rotate in two different directions. This dual-axis rotation capability provides the tested product with richer motion simulation scenarios, improving the accuracy and reliability of the test.

[0016] This high-precision dual-axis test turntable can send control commands to the test control cabinet according to the test requirements via an industrial control computer. The test control cabinet controls the rotation of the Y-axis and X-axis components according to the commands, while the angle sensor can provide real-time feedback on the actual rotation angle of the Y-axis and X-axis components. The test control cabinet compares the actual angle with the target angle and adjusts the rotation of the axis system according to the deviation, thereby achieving precise angle control and positioning, meeting the requirements of high-precision testing, and further improving the accuracy and reliability of the test.

[0017] This high-precision dual-axis test turntable uses a pin assembly design to prevent the Y-axis components from rotating freely when the product under test is mounted on the worktable, which facilitates the installation of the product under test. During transportation, it also prevents the Y-axis components from rotating freely, avoiding unnecessary damage to the turntable when it is not in operation.

[0018] This high-precision dual-axis test turntable, with its design of multiple iron blocks, allows for easy leveling of the U-shaped base by adjusting the installation height of the iron blocks at different positions or by increasing or decreasing the number of iron blocks. This ensures the turntable is in a horizontal state, guarantees the stability of the worktable during rotation, and improves the accuracy of test results. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a high-precision dual-axis testing turntable;

[0020] Figure 2 This is a cross-sectional view of a high-precision biaxial test turntable;

[0021] Figure 3 This is a schematic diagram of the X-axis system component in a high-precision biaxial testing turntable;

[0022] Figure 4 This is a cross-sectional view of the Y-axis system assembly in a high-precision biaxial test turntable;

[0023] Figure 5 This is a cross-sectional view of a pin assembly in a high-precision biaxial test turntable.

[0024] Figure 6 This is a schematic diagram of the base plate of a high-precision biaxial testing turntable.

[0025] In the picture:

[0026] 1. U-shaped base; 11. Base plate; 12. Inclined surface; 13. Inclined iron block; 14. Lead screw;

[0027] 2. Worktable; 21. Threaded hole;

[0028] 3. Y-axis system assembly; 31. Inner frame; 32. Inner shaft; 33. Inner ball bearing; 34. Screw; 35. Counterweight; 36. Nut;

[0029] 4. X-axis system assembly; 41. Outer shaft; 42. Outer ball bearing;

[0030] 5. Angle sensor;

[0031] 6. Pin assembly; 61. Sleeve; 62. Insert rod; 63. Fixing block; 64. Insertion hole; 65. Toggle lever; 66. Arc-shaped guide groove. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] This embodiment provides a high-precision dual-axis test turntable, such as Figures 1-5 As shown, the dual-axis test turntable includes a U-shaped base 1, a worktable 2 mounted on the U-shaped base 1, a Y-axis assembly 3 mounted on the U-shaped base 1 for rotating the worktable 2, and an X-axis assembly 4 mounted inside the U-shaped base 1 for rotating the Y-axis assembly 3. The dual-axis test turntable also includes an industrial control computer, a measurement and control cabinet, and angle sensors 5 mounted on the Y-axis assembly 3 and the X-axis assembly 4 for measuring angles. Both the Y-axis assembly 3 and the X-axis assembly 4 are connected to the output end of the measurement and control cabinet, and both angle sensors 5 are connected to the input end of the measurement and control cabinet. The measurement and control cabinet is bidirectionally connected to the industrial control computer. The U-shaped base 1 and the Y-axis assembly 3 are provided with pin assemblies 6 for locking the position of the Y-axis assembly 3.

[0034] To facilitate leveling the U-shaped base 1, a ring-shaped base plate 11 is provided at the bottom of the U-shaped base 1 for contact with the ground. An inclined surface 12 is fixedly provided on the base plate 11, and an inclined iron block 13 for contact with the bottom of the base 1 is slidably connected to the inclined surface 12. A lead screw 14 is rotatably connected to the base plate 11, and the inclined iron block 13 is screwed to the lead screw 14. This design allows the operator to simply rotate the lead screw 14. Since the lead screw 14 is rotatably connected to the base plate 11 and the inclined iron block 13 is screwed to the lead screw 14, the inclined iron block 13 will move along the inclination angle of the inclined surface 12. The inclined block 13 slides up and down, causing the height of the corresponding position of the U-shaped base 1 to change. When the inclined block 13 slides upward along the inclined plane, it will lift the U-shaped base 1 locally, increasing the height of that part; conversely, when the inclined block 13 slides downward along the inclined plane, the height of the U-shaped base 1 locally decreases. Therefore, by adjusting the sliding distance of the inclined block 13 at different positions, the height of different parts of the U-shaped base 1 can be changed, thereby achieving the leveling of the U-shaped base 1, ensuring the stability of the workbench 2 during rotation, and improving the accuracy of the test results.

[0035] In addition, to facilitate the installation of different products for testing, the worktable 2 is provided with threaded holes 21 arranged in a ring array, with multiple threaded holes 21 having different diameters. The design of threaded holes 21 with different diameters makes it convenient for operators to select the appropriate threaded holes 21 and bolts to fix the products on the worktable 2 for testing, thereby improving the versatility and applicability of the turntable.

[0036] During use, the industrial control computer generates control commands based on testing requirements, such as setting parameters like the rotation angle and speed of the worktable 2. These commands are processed and amplified by the measurement and control cabinet and then transmitted to the Y-axis assembly 3 and the X-axis assembly 4, respectively. The Y-axis assembly 3 drives the connected worktable 2 to rotate around the Y-axis, while the X-axis assembly 4 drives the inner frame 31 and the worktable 2 to rotate around the X-axis, realizing the movement of the worktable 2 in the dual-axis direction and simulating the complex motion state of the product under test in actual applications. During this process, the angle sensors 5 on the Y-axis assembly 3 and the X-axis assembly 4 monitor the rotation angles of the Y-axis assembly 3 and the X-axis assembly 4 in real time and feed the measurement data back to the measurement and control cabinet. The actual angle is compared with the target angle set by the industrial control computer to calculate the angle deviation. Based on this deviation, the control cabinet adjusts the control signals sent to the Y-axis assembly 3 and X-axis assembly 4 to correct the rotation of the axes in real time, forming a closed-loop control system. This ensures that the worktable 2 can accurately reach and stably maintain the target angle position, meeting the strict requirements of high-precision testing for angle control. However, during the installation of the product under test or the transportation of the turntable, the position of the Y-axis assembly 3 can be locked by operating the pin assembly 6 to restrict the rotation of the Y-axis assembly 3. When testing is required, the pin assembly 6 can be operated in reverse to release the lock on the Y-axis assembly 3, restoring it to a rotatable state and ensuring the normal operation of the turntable.

[0037] Specifically, the Y-axis system assembly 3 includes an inner frame 31 mounted on a U-shaped base 1, an inner shaft 32 rotatably connected within the inner frame 31 and fixedly connected to the bottom of the worktable 2, an inner ball bearing 33 located within the inner frame 31 at a position corresponding to the lower part of the inner shaft 32, and an inner torque motor fixedly mounted inside the bottom of the inner frame 31 and fixedly connected to the inner ring of the inner ball bearing 33. The inner torque motor is connected to the output end of the control cabinet. The outer ring of the inner ball bearing 33 is fixedly connected to the bottom of the inner shaft 32. The Y-axis system assembly 3 also includes a screw 34 fixedly mounted at the bottom of the inner frame 31, multiple counterweights 35 sleeved on the screw 34, and nuts 36 located on both sides of the multiple counterweights 35 and screwed to the screw 34 for locking the position of the multiple counterweights 35.

[0038] The industrial control computer sends instructions to the measurement and control cabinet according to the test requirements. After receiving the instructions, the measurement and control cabinet transmits control signals to the internal torque motor, starting the internal torque motor. Since the internal torque motor is fixedly connected to the inner ring of the inner ball bearing 33, the internal torque motor rotates, causing the inner ring of the inner ball bearing 33 to rotate as well. Because the outer ring of the inner ball bearing 33 is fixed to the bottom of the inner shaft 32, and the inner shaft 32 is rotatably connected within the inner frame 31 and fixed to the bottom of the worktable 2, the rotation of the inner ring of the inner ball bearing 33 is transmitted to the inner shaft 32 through the outer ring, thereby driving the worktable 2 to rotate around the Y-axis. This achieves precise control of the rotation angle and speed of the worktable 2 in the Y-axis direction. The system ensures accurate control and meets the requirements of the worktable movement under different testing scenarios. Furthermore, when different weights of products are installed on the worktable 2, the center of gravity of the products may shift, affecting the stability of the turntable rotation. In this case, the counterweight 35 can be moved on the screw 34 by loosening the nut 36, changing the distance between the counterweight 35 and the inner frame 31, and adjusting the overall center of gravity position. After adjustment, the nut 36 is tightened to fix the counterweight 35 in a suitable position. In this way, the rotational imbalance caused by uneven product weight can be offset, ensuring the stability of the Y-axis system 3 during rotation and improving the rotational accuracy and testing accuracy of the turntable.

[0039] Furthermore, the X-axis system assembly 4 includes an outer shaft 41 symmetrically rotated within the U-shaped base 1 and fixedly connected to both sides of the inner frame 31, an outer ball bearing 42 disposed within the U-shaped base 1 at the end of one of the outer shafts 41 away from the inner frame 31, and an external torque motor fixedly mounted on the U-shaped base 1 and fixedly connected to the inner ring of the outer ball bearing 42. The external torque motor is connected to the output end of the measurement and control cabinet, and the outer ring of the outer ball bearing 42 is fixedly connected to one of the outer shafts 41.

[0040] In the entire dual-axis test turntable system, the industrial control computer sends control commands to the test control cabinet according to the preset test tasks. After receiving the commands, the test control cabinet outputs the corresponding electrical signals to the external torque motor, starting the external torque motor to run. The external torque motor will drive the inner ring of the outer ball bearing 42 to rotate. Since the outer ring of the outer ball bearing 42 is fixed to one of the outer shafts 41, and the outer shaft 41 is symmetrically rotated in the U-shaped base 1 and fixedly connected to both sides of the inner frame 31, the rotation of the inner ring of the outer ball bearing 42 will be transmitted to the outer shaft 41 through the outer ring, thereby driving the inner frame 31 to rotate around the X-axis. At the same time, since the worktable 2 and the inner frame 31 are connected through the Y-axis system assembly 3, the rotation of the inner frame 31 also realizes the rotation of the worktable 2 in the X-axis direction. Thus, in conjunction with the Y-axis system assembly 3, the worktable 2 can realize dual-axis rotation, simulating the motion state of the product under test in a complex space.

[0041] Furthermore, the pin assembly 6 includes a sleeve 61 fixedly installed on one side of the U-shaped base 1, a rod 62 slidably connected inside the sleeve 61, a fixing block 63 fixedly installed on the inner frame 31 on the side corresponding to the sleeve 61, a socket 64 opened on the fixing block 63 for inserting the rod 62, a lever 65 provided on the outside of the sleeve 61 and fixedly connected to the rod 62, and an arc-shaped guide groove 66 opened on the sleeve 61 for sliding the lever 65.

[0042] When the product to be tested needs to be installed on the workbench 2 or during the transportation of the turntable, the operator operates the lever 65. Since the lever 65 is fixedly connected to the insertion rod 62, when the operator pushes the lever 65 to slide along the arc-shaped guide groove 66 on the sleeve 61, the insertion rod 62 will slide synchronously inside the sleeve 61. As the lever 65 slides, the insertion rod 62 gradually approaches the insertion hole 64 on the fixing block 63 until it is fully inserted. At this time, the insertion rod 62 connects the inner frame 31 and the U-shaped base 1 into a relatively fixed whole, restricting the rotation of the inner frame 31, thereby preventing the Y-axis system assembly 3 from rotating freely, ensuring that the workbench 2 and the entire assembly are stable during product installation or transportation. To ensure the stability of the Y-axis assembly 3 and prevent product damage or turntable component wear due to accidental rotation, the arc-shaped guide groove 66 is designed to prevent the lever 65 from excessively moving and disengaging from the sleeve 61. When it is necessary to release the lock on the Y-axis assembly 3, the operator reverses the lever 65, causing it to slide in the opposite direction along the arc-shaped guide groove 66. Then, the lever 65 will drive the insertion rod 62 to be gradually pulled out of the insertion hole 64 of the fixing block 63. After the insertion rod 62 is completely pulled out, the Y-axis assembly 3 is no longer restricted by the pin assembly 6, the inner frame 31 can rotate freely, and the turntable resumes its normal dual-axis rotation function for subsequent testing.

[0043] It should be added that the main control computer is planned to be an HPC-710NG1620 industrial computer, both angle sensors 5 are Renishaw RSM series encoders of model RSM115, and the two angle sensors 5 are respectively fixed on the inner shaft 32 and another outer shaft 41. The inner ball bearing 33 and the outer ball bearing 42 are angular contact ball bearings of models 7018AC and 7914AC respectively. The inner torque motor and the outer torque motor are models 160LYX25 and 180LYX42 respectively.

[0044] It should also be noted that the control cabinet includes a management and monitoring unit, which consists of a central management module, a communication module, and a clock synchronization module. The central management module manages and monitors the working status of the dual-axis control circuit and also has a centralized protection emergency stop function. In the event of abnormalities in the turntable, such as overcurrent or overspeed, it can quickly cut off the power supply to protect the equipment and personnel safety. The communication module connects to the industrial control computer via UART and to the dual-axis control circuit of Y-axis component 3 and X-axis component 4 to realize the uploading of measurement data and the issuance of control commands, ensuring smooth information flow between the industrial control computer and various parts of the turntable. The clock synchronization module controls the sampling synchronization of the dual-axis control system composed of Y-axis component 3 and X-axis component 4 through a clock synchronization protocol, so that the data acquisition of angle sensor 5 and the control of the internal torque motor and external torque motor are synchronized, ensuring measurement and control accuracy.

[0045] The above description is merely a preferred embodiment of this application, but the scope of protection of this application 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 application, based on the technical solution and concept of this application, should be included within the scope of protection of this application.

Claims

1. A high-precision double-shaft test rotary table, comprising a U-shaped base (1), a workbench (2) arranged on the U-shaped base (1), a Y-axis assembly (3) arranged on the U-shaped base (1) for rotating the workbench (2), and an X-axis assembly (4) arranged in the U-shaped base (1) for rotating the Y-axis assembly (3); the double-shaft test rotary table further comprises an industrial computer, a measurement and control cabinet, and angle sensors (5) arranged on the Y-axis assembly (3) and the X-axis assembly (4) respectively for measuring angles, the Y-axis assembly (3) and the X-axis assembly (4) are connected to the output end of the measurement and control cabinet, the two angle sensors (5) are connected to the input end of the measurement and control cabinet, and the measurement and control cabinet is bidirectionally connected to the industrial computer; the U-shaped base (1) and the Y-axis assembly (3) are provided with a bolt assembly (6) for locking the position of the Y-axis assembly (3). characterized in that The bottom of the U-shaped base (1) is provided with a bottom plate (11) in annular distribution for contacting the ground, an inclined surface (12) is fixedly arranged on the bottom plate (11), an inclined iron block (13) for contacting the bottom of the U-shaped base (1) is slidably connected to the inclined surface (12), a screw rod (14) is rotatably connected to the bottom plate (11), and the inclined iron block (13) is screwed with the screw rod (14). The workbench (2) is provided with screw holes (21) in annular array distribution, and the diameters of the plurality of screw holes (21) are different.

2. The high precision dual-axis test turntable of claim 1, wherein: The Y-axis assembly (3) comprises an inner frame (31) arranged on the U-shaped base (1), an inner shaft (32) rotatably connected in the inner frame (31) and fixedly connected to the bottom of the workbench (2), an inner ball bearing (33) arranged in the inner frame (31) at a position corresponding to below the inner shaft (32), and an inner torque motor fixedly installed at the inner bottom of the inner frame (31) and fixedly connected to the inner ring of the inner ball bearing (33), wherein the inner torque motor is connected to the output end of the measurement and control cabinet, and the outer ring of the inner ball bearing (33) is fixedly connected to the bottom of the inner shaft (32).

3. The high precision dual-axis test turntable of claim 1, wherein: The Y-axis assembly (3) further comprises a screw rod (34) fixedly installed at the bottom of the inner frame (31), a plurality of counterweights (35) sleeved on the screw rod (34), and nuts (36) arranged on both sides of the plurality of counterweights (35) and screwed with the screw rod (34) for locking the positions of the plurality of counterweights (35).

4. The high precision dual axis test turntable of claim 3, wherein: The X-axis assembly (4) comprises outer shafts (41) symmetrically and rotatably arranged in the U-shaped base (1) and fixedly connected to both sides of the inner frame (31), an outer ball bearing (42) arranged in the U-shaped base (1) at a position corresponding to one end of one of the outer shafts (41) away from the inner frame (31), and an outer torque motor fixedly installed on the U-shaped base (1) and fixedly connected to the inner ring of the outer ball bearing (42), wherein the outer torque motor is connected to the output end of the measurement and control cabinet, and the outer ring of the outer ball bearing (42) is fixedly connected to one of the outer shafts (41).

5. The high precision dual axis test turntable of claim 4, wherein: ​ 6. The high precision dual axis test turntable of claim 4, wherein: ​ 7. The high precision dual axis test turntable of claim 6, wherein: The latch assembly (6) comprises a sleeve (61) fixedly installed on one side of the U-shaped base (1), a plug rod (62) slidingly connected in the sleeve (61), a fixed block (63) fixedly installed on the inner frame (31) at a side corresponding to the sleeve (61), a plug hole (64) formed on the fixed block (63) and used for plug connection of the plug rod (62), a push rod (65) arranged outside the sleeve (61) and fixedly connected with the plug rod (62), and an arc-shaped guide groove (66) formed on the sleeve (61) and used for sliding of the push rod (65).

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