High-precision three-axis test rotary table

Abstract

The utility model discloses a high-precision three-axis test rotary table, and belongs to the technical field of three-axis test rotary tables. The three-axis test rotary table comprises a base, an outer frame rotationally connected to the base, a middle frame rotationally connected to the inner side of the outer frame, an inner frame rotationally connected to the inner side of the middle frame, a mounting plate fixedly mounted on one side of the inner frame, and a plurality of rotating shafts arranged on the base, and shafting driving assemblies used for enabling the outer frame, the middle frame and the inner frame to rotate are arranged in the outer frame and the middle frame. According to the high-precision three-axis test turntable, through the combined design of the industrial personal computer, the measurement and control cabinet and the three angle sensors, a measurement and control system of a closed-loop feedback mechanism can be formed, an actual angle can be compared with a target angle, rotation of a shaft system can be adjusted according to deviation, and therefore accurate angle control and positioning are achieved, and the measurement and control accuracy is improved. The requirement of high-precision testing is met, the accuracy and reliability of testing are further improved, and manual operation errors are reduced.

Description

Technical Field

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

[0002] With the development of technology and the continuous advancement of industrial automation, the demand for precision testing equipment is increasing in various fields. Especially in industries such as aerospace, robotics, automotive, and electronics, the requirements for the accuracy, reliability, and realism of testing environments are becoming increasingly stringent. Traditional single-axis or dual-axis testing equipment can no longer meet the simulation needs of multi-degree-of-freedom and complex motions; therefore, three-axis testing turntables have emerged.

[0003] Traditional triaxial test turntables have relatively simple control systems, typically only capable of basic on / off control and motion parameter adjustment. Furthermore, they rely heavily on manual judgment during operation, making them prone to errors, especially during complex multi-axis adjustments. The experience and skill level of the tester significantly impact the test results, increasing instability. In addition, during equipment transportation or sample loading, the turntable's axes are susceptible to free rotation due to minute gaps in the axis system. This free rotation can lead to collisions and friction, ultimately causing equipment damage.

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

[0005] This application provides a high-precision triaxial test turntable, which aims to solve the problems mentioned in the background art, such as the single control system, reliance on manual operation which easily leads to errors, and the free rotation of the axis system which causes equipment collision and friction damage.

[0006] To achieve the above objectives, this application provides the following technical solution: a high-precision triaxial test turntable, comprising a base, an outer frame rotatably connected to the base, a middle frame rotatably connected to the inner side of the outer frame, an inner frame rotatably connected to the inner side of the middle frame, a mounting plate fixedly installed on one side of the inner frame, and shaft drive assemblies respectively disposed in the base, the outer frame, and the middle frame for rotating the outer frame, the middle frame, and the inner frame.

[0007] The triaxial test turntable also includes an industrial control computer, a measurement and control cabinet, and angle sensors respectively installed on the three axis drive components. The three axis drive components are all connected to the output end of the measurement and control cabinet, and the three angle sensors are all connected to the input end of the measurement and control cabinet. The measurement and control cabinet is connected to the input end of the industrial control computer.

[0008] Locking components for position locking are provided between the outer frame and the base, the middle frame and the outer frame, and the middle frame and the inner frame. The combined design of the outer frame, middle frame, inner frame, and three shaft drive components enables the test turntable to simulate multiple degrees of freedom of movement, providing more comprehensive and realistic testing conditions for the test products on the mounting plate, thereby improving the effectiveness and practicality of the test results. Simultaneously, the combined design of the industrial control computer, the measurement and control cabinet, and the three angle sensors forms a closed-loop feedback mechanism measurement and control system. The industrial control computer sends commands to the measurement and control cabinet to start the corresponding shaft drive components. The measurement and control cabinet receives angle information from the angle sensors, compares the actual angle with the target angle, and adjusts the rotation of the shaft system according to the deviation, thereby achieving precise angle control and positioning, meeting the requirements of high-precision testing, further improving the accuracy and reliability of testing, reducing human error, and locking the outer frame, middle frame, and inner frame in case of test products on the mounting plate, transportation of the test turntable, or abnormal situations, preventing free rotation of the shaft system, avoiding equipment damage or personnel injury, and enhancing equipment safety.

[0009] Preferably, in order to ensure that the turntable is in a horizontal state, a leveling component is provided at the bottom of the base; the design of the leveling component can ensure that the turntable is in a horizontal state and avoid test errors caused by the tilt of the turntable.

[0010] Preferably, to facilitate leveling, the leveling assembly includes a base plate arranged in a ring at the bottom of the base for contact with the ground, an inclined surface fixedly mounted on the base plate, an inclined block slidably connected to the inclined surface and in contact with the bottom of the base, and a lead screw rotatably connected to the base plate and screwed to the inclined block. With this design, the operator only needs to rotate the lead screw to push the inclined block to slide on the inclined surface to adjust the height of the base, thereby achieving precise leveling.

[0011] Preferably, to achieve the rotation of the outer frame, middle frame, and inner frame, the shaft drive assembly includes a connecting shaft, bearings, and a torque motor. The outer ring of the bearing is fixedly connected to the connecting shaft, and the inner ring of the bearing is fixedly connected to the output shaft of the torque motor. The torque motor is connected to the output end of the control cabinet, and the angle sensor is fixedly mounted on the connecting shaft. The fixed outer ring of the bearing to the connecting shaft and the connection of the inner ring to the output shaft of the torque motor can reduce rotational friction and improve rotational accuracy. The torque motor provides power for rotation and is connected to the control cabinet, allowing for precise control of speed and angle according to instructions. The angle sensor, fixed on the connecting shaft, monitors the rotational angle of the shaft system in real time, providing accurate angle feedback for the closed-loop control system and ensuring high precision and stability of the turntable operation.

[0012] Preferably, to facilitate the locking of the outer frame, middle frame, and inner frame, the locking assembly includes a sleeve, a pin slidably connected to the sleeve, a connecting block disposed on one side of the sleeve, and a socket provided on the connecting block near the sleeve for the pin to be inserted. With this design, in the event of abnormalities during product installation, transportation, or turntable operation, the operator only needs to insert the pin into the socket of the connecting block to prevent the shaft system from rotating freely, thus protecting the equipment and the test product. Furthermore, during turntable transportation, it can prevent equipment damage caused by shaft system rotation due to vibration.

[0013] Preferably, to facilitate the operation of the pin, the locking assembly further includes a lever passing through the sleeve and fixedly connected to the pin, and an arc-shaped guide groove formed on the sleeve for the lever to slide. With this design, the operator can easily move the pin on the sleeve by simply moving the lever, thereby realizing the insertion and removal of the pin. The arc-shaped guide groove guides and limits the lever, ensuring that the pin is accurately inserted into or removed from the insertion hole, and also preventing the pin from moving excessively and detaching from the sleeve, thus improving the accuracy and efficiency of the operation and facilitating the user to quickly perform locking and unlocking operations.

[0014] This high-precision triaxial test turntable, through the combined design of an outer frame, a middle frame, an inner frame, and three axis drive components, enables the test turntable to simulate multiple degrees of freedom of motion, providing more comprehensive and realistic test conditions for the test products on the mounting plate, thereby improving the effectiveness and practicality of the test results;

[0015] This high-precision triaxial test turntable, through the combined design of an industrial control computer, a measurement and control cabinet, and three angle sensors, can form a measurement and control system with a closed-loop feedback mechanism. The industrial control computer sends commands to the measurement and control cabinet to start the corresponding axis drive components. The measurement and control cabinet receives angle information from the angle sensors, 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, further improving the accuracy and reliability of testing, and reducing human operation errors.

[0016] This high-precision triaxial test turntable, through the design of the locking assembly, can lock the outer frame, middle frame, and inner frame in the event of testing products on the mounting plate, transportation of the test turntable, or abnormalities, preventing the shaft system from rotating freely, avoiding equipment damage or personal injury, and enhancing equipment safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a high-precision triaxial testing turntable;

[0018] Figure 2 This is a cross-sectional view of a high-precision triaxial test turntable;

[0019] Figure 3 This is a partial structural diagram of a high-precision triaxial testing turntable.

[0020] Figure 4 This is a schematic diagram of the leveling component in a high-precision triaxial testing turntable.

[0021] Figure 5 This is a schematic diagram of the locking assembly in a high-precision triaxial testing turntable.

[0022] In the picture:

[0023] 1. Base; 11. Leveling assembly; 111. Base plate; 112. Inclined surface; 113. Wedge block; 114. Lead screw;

[0024] 2. Outer frame;

[0025] 3. Medium framework;

[0026] 4. Internal frame;

[0027] 5. Mounting plate;

[0028] 6. Shaft drive assembly; 61. Connecting shaft; 62. Bearing; 63. Torque motor;

[0029] 7. Angle sensor;

[0030] 8. Locking assembly; 81. Sleeve; 82. Pin; 83. Connecting block; 84. Insertion hole; 85. Lever; 86. Arc-shaped guide groove. Detailed Implementation

[0031] 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.

[0032] This embodiment provides a high-precision triaxial testing turntable, such as... Figures 1-5As shown, the triaxial test turntable includes a base 1, an outer frame 2 rotatably connected to the base 1, a middle frame 3 rotatably connected to the inner side of the outer frame 2, an inner frame 4 rotatably connected to the inner side of the middle frame 3, a mounting plate 5 fixedly installed on one side of the inner frame 4, and shaft drive assemblies 6 respectively disposed in the base 1, outer frame 2, and middle frame 3 for rotating the outer frame 2, middle frame 3, and inner frame 4; the triaxial test turntable also includes an industrial control computer, a measurement and control cabinet, and angle sensors 7 respectively disposed on the three shaft drive assemblies 6. The three shaft drive assemblies 6 are all connected to the output end of the measurement and control cabinet, and the three angle sensors 7 are all connected to the input end of the measurement and control cabinet. The measurement and control cabinet is connected to the input end of the industrial control computer; locking assemblies 8 for locking the position are provided between the outer frame 2 and the base 1, between the middle frame 3 and the outer frame 2, and between the middle frame 3 and the inner frame 4.

[0033] In use, after the product under test is bolted onto the mounting plate 5, the operator sends control commands to the control cabinet via the industrial control computer according to the testing requirements. Upon receiving the commands, the control cabinet sends start signals to the corresponding shaft drive components 6, causing the outer frame 2, middle frame 3, and inner frame 4 to rotate accordingly. This simulates multiple degrees of freedom motion, providing a near-realistic complex motion environment for the product under test on the mounting plate 5, meeting different testing needs and allowing the turntable to operate according to predetermined angles, speeds, and motion modes. While the outer frame 2, middle frame 3, and inner frame 4 are rotated by activating the corresponding shaft drive components 6, the angle sensors 7 on the corresponding shaft drive components 6 detect the rotation angle in real time and feed it back to the control cabinet. The control cabinet then processes the received angle data... The actual angle information fed back by sensor 7 is compared with the target angle set by the industrial control computer to calculate the angle deviation. Then, based on the deviation, the control cabinet adjusts the drive signal sent to the shaft drive assembly 6, such as changing the direction of the shaft drive assembly 6, thereby adjusting the rotation of the shaft system. This makes the actual angle of the turntable continuously approach the target angle, achieving precise angle control and positioning to meet high-precision testing requirements. However, when the test product is installed on the mounting plate 5, during turntable transportation, or when the turntable malfunctions, the operator can operate the locking assembly 8 to ensure the safety of the equipment and personnel. This locks the relative positions between the outer frame 2 and the base 1, the middle frame 3 and the outer frame 2, and the middle frame 3 and the inner frame 4, preventing the shaft system from rotating freely and avoiding equipment damage caused by accidental rotation of the shaft system.

[0034] Specifically, the base 1 is provided with a leveling component 11 at the bottom. The leveling component 11 includes a base plate 111 arranged in a ring at the bottom of the base 1 for contact with the ground, an inclined surface 112 fixedly installed on the base plate 111, an inclined iron block 113 slidably connected to the inclined surface 112 and in contact with the bottom of the base 1, and a screw rod 114 rotatably connected to the base plate 111 and screwed to the inclined iron block 113.

[0035] When the test turntable is needed, the operator first needs to rotate the corresponding lead screw 114 according to the horizontal state of the base 1. Since the lead screw 114 is rotatably connected to the base plate 111 and the inclined block 113 is screwed to the lead screw 114, the inclined block 113 will slide up and down along the inclination angle of the inclined plane 112. As the inclined block 113 slides, it will cause the height of the corresponding position of the base 1 to change. When the inclined block 113 slides upward along the inclined plane 112, it will lift the base 1 locally, increasing the height of that part; conversely, when the inclined block 113 slides downward along the inclined plane 112, the height of the base 1 locally decreases. By adjusting the sliding distance of the inclined block 113 at different positions, the height of different parts of the base 1 can be changed, thereby achieving the leveling of the base 1, ensuring the stability of the test turntable during rotation, and improving the accuracy of the test results.

[0036] Furthermore, the shaft drive assembly 6 includes a connecting shaft 61, a bearing 62, and a torque motor 63. The outer ring of the bearing 62 is fixedly connected to the connecting shaft 61, and the inner ring of the bearing 62 is fixedly connected to the output shaft of the torque motor 63. The torque motor 63 is connected to the output end of the control cabinet, and the angle sensor 7 is fixedly mounted on the connecting shaft 61.

[0037] Among them, the shaft drive assembly 6 for driving the outer frame 2 to rotate has a connecting shaft 61 that rotates on the base 1, and the end of the connecting shaft 61 that is away from the outer ring of the bearing 62 is fixedly connected to the bottom of the outer frame 2. The bearing 62 is set inside the base 1, and the torque motor 63 is fixedly set inside the base 1. The shaft drive assembly 6 for driving the middle frame 3 to rotate has a connecting shaft 61 that rotates inside the outer frame 2, and the end of the connecting shaft 61 that is away from the outer ring of the bearing 62 is fixedly connected to the side of the middle frame 3. The bearing 62 is set inside the outer frame 2, and the torque motor 63 is fixedly set inside the outer frame 2. The shaft drive assembly 6 for driving the inner frame 4 to rotate has a connecting shaft 61 that rotates inside the middle frame 3, and the end of the connecting shaft 61 that is away from the outer ring of the bearing 62 is fixedly connected to the bottom of the side of the inner frame 4. The bearing 62 is set inside the middle frame 3, and the torque motor 63 is fixedly set inside the middle frame 3.

[0038] After the product under test is installed on the mounting plate 5, the operator sends corresponding instructions to the control cabinet via the industrial control computer according to the testing requirements. The control cabinet then sends a start signal to the torque motor 63 on the corresponding shaft drive assembly 6. When the torque motor 63 is powered on, it generates rotational torque, and its output shaft drives the inner ring of the bearing 62, which is fixedly connected to it, to rotate. Since the inner ring of the bearing 62 is tightly connected to the output shaft of the torque motor 63, and the outer ring is fixed to the connecting shaft 61, this structural design ensures that the rotational power of the torque motor 63 is... The transmission to the connecting shaft 61 is efficient and stable. Therefore, for the shaft drive assembly 6 that drives the outer frame 2 to rotate, the connecting shaft 61 rotates on the base 1, and its end away from the outer ring of the bearing 62 is fixed to the bottom of the outer frame 2. When the connecting shaft 61 rotates under the drive of the torque motor 63, it drives the outer frame 2 to rotate around the base 1. Similarly, for the shaft drive assembly 6 that drives the middle frame 3 to rotate, the connecting shaft 61 is rotatably connected to the inner side of the outer frame 2 and fixed to the side of the middle frame 3. The rotation of the connecting shaft 61 drives the middle frame 3 to rotate. The shaft drive assembly 6, which drives the inner frame 4 to rotate, rotates the outer frame 2. The connecting shaft 61 rotates inside the middle frame 3 and is fixed to the bottom side of the inner frame 4, enabling the inner frame 4 to rotate relative to the middle frame 3. Thus, the outer frame 2, middle frame 3, and inner frame 4 can rotate independently and precisely according to their respective shaft systems, thereby simulating complex multi-degree-of-freedom motion. This allows the mounting plate 5 connected to the inner frame 4 and the product under test to perform multi-degree-of-freedom motion. Furthermore, the angle sensor 7 monitors the rotation angle of the connecting shaft 61 in real time and converts the angle information into an electrical signal to feed back to the measurement and control cabinet. After receiving the feedback signal from the angle sensor 7, the measurement and control cabinet compares and analyzes it with the target angle set by the industrial control computer. If there is an angle deviation, the measurement and control cabinet will adjust and send a start signal to the corresponding torque motor 63 according to the deviation value, such as changing the direction, thereby adjusting the output torque and speed of the corresponding torque motor 63 to make the rotation angle of the connecting shaft 61 closer to the target value. This achieves precise control of the rotation angle of each frame of the turntable, meeting the requirements of high-precision testing.

[0039] Furthermore, the locking assembly 8 includes a sleeve 81, a pin 82 slidably connected to the sleeve 81, a connecting block 83 disposed on one side of the sleeve 81, and an insertion hole 84 opened on the side of the connecting block 83 near the sleeve 81 for the pin 82 to be inserted. The locking assembly 8 also includes a lever 85 passing through the sleeve 81 and fixedly connected to the pin 82, and an arc-shaped guide groove 86 opened on the sleeve 81 for the lever 85 to slide.

[0040] Additionally, the locking assembly 8 used to lock the base 1 and the outer frame 2 has its sleeve 81 fixed on the outer frame 2 and its connecting block 83 fixed on the base 1; the locking assembly 8 used to lock the middle frame 3 and the outer frame 2 has its sleeve 81 fixed on the outer frame 2 and its connecting block 83 fixed on the middle frame 3; the locking assembly 8 used to lock the middle frame 3 and the inner frame 4 has its sleeve 81 fixed on the middle frame 3 and its connecting block 83 fixed on the inner frame 4.

[0041] When it is necessary to lock the outer frame 2 and base 1, the middle frame 3 and outer frame 2, and the middle frame 3 and inner frame 4, the operator can hold the lever 85 and push the pin 82 along the trajectory of the arc-shaped guide groove 86, causing the pin 82 to slide along the sleeve 81. Since the pin 82 is fixedly connected to the lever 85, the pin 82 will move with the movement of the lever 85. When the pin 82 moves to the position of the insertion hole 84 of the connecting block 83, the pin 82 is inserted into the insertion hole 84, such as the locking assembly 8 used to lock the base 1 and outer frame 2. When the pin 82 is inserted into the insertion hole 84 of the connecting block 83, the outer frame 2 and the base 1 are locked together. The relative rotation between the seats 1 is restricted, thus achieving locking between them. Similarly, the locking components 8 that lock the middle frame 3 and the outer frame 2, and the middle frame 3 and the inner frame 4, also achieve mechanical locking by inserting the pins 82 into the corresponding holes 84 of the connecting blocks 83, thereby restricting the relative rotation between the middle frame 3 and the outer frame 2, and between the middle frame 3 and the inner frame 4. When unlocking is required, the operator holds the lever 85 and pulls it along the trajectory of the arc-shaped guide groove 86, causing the pins 82 to move in the opposite direction within the sleeve 81 and disengage from the holes 84, thus unlocking the device.

[0042] It should be added that the main control computer is planned to be an HPC-710NG1620 industrial computer, the three angle sensors 7 are all Renishaw RSM series encoders with models RSM115, RSM115 and RSM229, the three bearings 62 are angular contact ball bearings with models 7924AC, 7924AC and 7032AC respectively, and the three torque motors 63 have models 160LYX25, 250LYX45 and 250LYX45 respectively.

[0043] 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 case 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 three axis drive components 6 to realize the uploading of measurement data and the issuance of control commands, ensuring smooth information flow between the industrial control computer and the various parts of the turntable. The clock synchronization module controls the sampling synchronization of the three-axis control system composed of the three axis drive components 6 through a clock synchronization protocol, so that the data acquisition torque motor 63 of the angle sensor 7 is synchronized, ensuring measurement and control accuracy.

[0044] 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 tri-axial test turntable characterized by: It includes base (1), outer frame (2) rotationally connected to the base (1), middle frame (3) rotationally connected to the inner side of the outer frame (2), inner frame (4) rotationally connected to the inner side of the middle frame (3), mounting plate (5) fixedly installed on one side of the inner frame (4), and shaft system drive assembly (6) provided in the base (1), outer frame (2) and middle frame (3) respectively for rotating the outer frame (2), middle frame (3) and inner frame (4); The three-axis test turntable further comprises an industrial computer, a measurement and control cabinet, and an angle sensor (7) provided on each of the three shaft system drive assemblies (6), wherein the three shaft system drive assemblies (6) are connected to the output end of the measurement and control cabinet, and the three angle sensors (7) are connected to the input end of the measurement and control cabinet, and the measurement and control cabinet is connected to the input end of the industrial computer; The outer frame (2) and the base (1), the middle frame (3) and the outer frame (2), and the middle frame (3) and the inner frame (4) are provided with locking assemblies (8) for locking the positions.

2. The high precision tri-axial test turntable of claim 1, wherein: The base (1) is provided with a leveling assembly (11) at the bottom.

3. The high precision tri-axial test turntable of claim 2, wherein: The leveling assembly (11) comprises a bottom plate (111) provided at the bottom of the base (1) and arranged in a ring shape for contacting the ground, an inclined surface (112) fixedly installed on the bottom plate (111), an inclined iron block (113) slidingly connected to the inclined surface (112) and in contact with the bottom of the base (1), and a lead screw (114) rotationally connected to the bottom plate (111) and screwed with the inclined iron block (113).

4. The high precision tri-axial test turntable of claim 1, wherein: The shaft system drive assembly (6) comprises a connecting shaft (61), a bearing (62) and a torque motor (63), the outer ring of the bearing (62) is fixedly connected with the connecting shaft (61), the inner ring of the bearing (62) is fixedly connected with the output shaft of the torque motor (63), the torque motor (63) is connected with the output end of the measurement and control cabinet, and the angle sensor (7) is fixedly provided on the connecting shaft (61).

5. The high precision tri-axial test turntable of claim 1, wherein: The locking assembly (8) comprises a sleeve (81), a latch (82) slidingly connected to the sleeve (81), a connecting block (83) provided on one side of the sleeve (81), and a plug hole (84) provided on the side of the connecting block (83) close to the sleeve (81) for inserting the latch (82).

6. The high precision tri-axial test turntable of claim 5, wherein: The locking assembly (8) further comprises a lever (85) penetrating the sleeve (81) and fixedly connected with the latch (82), and an arc-shaped guide groove (86) provided on the sleeve (81) for sliding the lever (85).

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