Ball screw back clearance automatic detection equipment

Abstract

The utility model discloses ball screw back clearance automatic detection equipment, which belongs to the technical field of ball screws and is characterized in that a driving clamping module and a detection module are arranged on a measuring platform, and a transmission module for carrying a screw is arranged above the measuring platform; according to the driving clamping module, a direct drive motor, a tailstock clamping device and a moving device are arranged on the measuring platform, a pneumatic three-jaw chuck used for clamping the two ends of the lead screw is arranged at the output end of the direct drive motor, and a nut clamping device is arranged on the moving device. The automatic detection equipment for the back clearance of the ball screw has remarkable technical advantages, in the aspect of detection efficiency, the gantry conveying device of the transmission module is matched with the clamping device, automatic clamping is achieved, manual intervention is reduced, the automatic detection equipment is suitable for repeated or batch detection, data consistency is ensured, and the detection efficiency is greatly improved. A tailstock and a nut clamping device of the driving clamping module can be adaptive to ball screws and nuts of the ball screws of different specifications, investment of special clamps is reduced, and detection precision and consistency are guaranteed through accurate clamping.

Description

Technical Field

[0001] This utility model belongs to the field of ball screw technology, and in particular to an automatic ball screw backlash detection device. Background Technology

[0002] Ball screws are highly efficient and precise transmission devices that convert rotary motion into linear motion. They are characterized by high precision, high efficiency, and long lifespan, and are widely used in CNC machine tools, industrial robots, aerospace, semiconductor manufacturing, and medical devices. The performance of the ball screw directly determines the positioning accuracy, repeatability, and dynamic response capability of the equipment. Prolonged use or improper assembly can lead to increased backlash in the ball screw, resulting in decreased positioning accuracy, vibration and noise, reduced dynamic performance under high-speed and high-acceleration conditions, and shortened lifespan. Therefore, backlash detection is a core aspect of ball screw maintenance and quality control. Currently, common backlash detection methods, whether using dial indicators, optical equipment, or electronic sensors, all require manual installation of the ball screw to be tested onto the testing equipment for backlash measurement. Because different specifications of ball screws have different shaft diameters, nut sizes, and different screw end machining processes, different testing equipment is needed to measure the backlash of different specifications of ball screws.

[0003] Existing detection methods have the following drawbacks:

[0004] Manually installing ball screws onto testing equipment for backlash measurement is prone to errors due to varying skill levels among operators, affecting measurement results. Furthermore, manual operation cannot be seamlessly integrated with automated testing systems, resulting in high time costs and low efficiency.

[0005] Different testing equipment is required to test ball screws of different specifications. The equipment purchase and maintenance costs are high, the testing efficiency is low, the testing standards are inconsistent, and the space occupied is large. Utility Model Content

[0006] The purpose of this utility model is to provide an automatic ball screw backlash detection device, comprising: a measuring platform, on which a drive clamping module and a detection module are provided, and a transmission module for transporting the screw is provided above the measuring platform. The drive clamping module includes: a direct drive motor, a tailstock clamping device, and a moving device provided on the measuring platform; a pneumatic three-jaw chuck for clamping both ends of the screw is provided at the output end of the direct drive motor; and a nut clamping device is provided on the moving device.

[0007] Furthermore, the moving device includes: a stator, a plurality of stators arranged in a row on the measuring platform, a first mover and a second mover being provided on the stator, the first mover and the second mover being mounted on the measuring platform via a double guide rail pair, a tailstock clamping device being provided on the second mover, and a nut clamping device being provided on the first mover.

[0008] Furthermore, a pneumatic guide rail clamp is provided on the first mover and / or the second mover.

[0009] Furthermore, the tailstock clamping device includes: a bearing support mounted on the moving device; a housing end cap mounted on the bearing support; a housing mounted on the housing end cap; a fixing plate inside the housing; multiple linear bearings arranged in a circumferential array on the fixing plate; a guide shaft inside each linear bearing; a sliding plate at one end of the guide shaft; a second spring mounted on the guide shaft; the second spring positioned between the sliding plate and the fixing plate; a cylinder mounted on the bearing support or the moving device; a cylinder push block at the cylinder output end; the cylinder push block contacting the sliding plate; a push rod hinged to the other end of the guide shaft; multiple sliding slots arranged in a circumferential array on the end face of the housing; an optical axis arranged in each sliding slot; a gripper slidably mounted on the optical axis; a first spring mounted on the optical axis for driving the gripper to radially reset; a gripper connecting rod on the gripper; and a gripper connecting rod hinged to the other end of the push rod.

[0010] Furthermore, the inner wall of the sliding groove is fitted with a plurality of ball bearings.

[0011] Furthermore, a buffer layer is provided on the gripper.

[0012] Furthermore, the nut clamping device includes: a rotary cylinder, which is mounted on the first moving part, and the output end of the rotary cylinder is connected to a first electric gripper via a connecting block, and the first electric gripper is provided with a first V-shaped block.

[0013] Furthermore, the detection module includes: a vibration monitoring sensor, which is installed on the first V-block; a laser interferometer measuring mirror and a temperature sensor are provided on the second mover; a digital display pressure sensor is installed on the pneumatic three-jaw chuck; and a laser interferometer reference mirror that cooperates with the laser interferometer measuring mirror is provided on the measuring platform.

[0014] Furthermore, the transmission module includes: a gantry conveyor, the output end of which is equipped with a clamping device, and a feeding platform is provided below the gantry conveyor. The feeding platform is equipped with multiple screw placement seats for supporting the screw and multiple screw sensing devices for measuring the length of the screw.

[0015] Furthermore, the clamping device includes a second electric gripper, the output end of which is provided with a second V-shaped block.

[0016] Beneficial effects:

[0017] This solution's automatic ball screw backlash detection equipment boasts significant technical advantages. In terms of detection efficiency, the gantry conveyor and clamping device of the transmission module work together to achieve automated clamping, reducing manual intervention. It is suitable for multiple or batch inspections, ensuring data consistency and significantly improving detection efficiency. Regarding versatility and accuracy, the tailstock and nut clamping device of the drive clamping module can adapt to different specifications of ball screws and nuts, reducing the investment in dedicated fixtures. Precise clamping ensures detection accuracy and consistency. In terms of measurement accuracy and anti-interference capability, the detection module integrates digital pressure, laser interferometer, vibration monitoring, and temperature sensors to collect data in real time, compensating for errors caused by clamping force, vibration, and thermal expansion. The multi-sensor collaboration enhances measurement accuracy, reduces the impact of environmental interference, and ensures accurate backlash measurement even in complex environments, providing a reliable basis for ball screw quality inspection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the transmission module of this utility model;

[0020] Figure 3 This is a schematic diagram of the drive clamping module structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the mobile device of this utility model;

[0022] Figure 5 This is a schematic diagram of the tailstock clamping device of this utility model;

[0023] Figure 6 This is a diagram of the tailstock clamping device of this utility model in its non-clamping state.

[0024] Figure 7 This is a diagram showing the holding state of the tailstock clamping device of this utility model;

[0025] Figure 8 This is a schematic diagram showing the location of the detection module of this utility model;

[0026] Figure 9 This is a schematic diagram of the clamping device of this utility model. Detailed Implementation

[0027] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0028] Example: Figures 1-9As shown, an automatic ball screw backlash detection device includes: a measuring platform 4, on which a drive clamping module 2 and a detection module 3 are mounted; a transmission module 1 for transporting the ball screw is mounted above the measuring platform 4; the drive clamping module 2 includes: a direct drive motor 21, a tailstock clamping device 23, and a moving device 24 mounted on the measuring platform 4; a pneumatic three-jaw chuck 22 for clamping both ends of the ball screw is mounted at the output end of the direct drive motor 21; and a nut clamping device 25 is mounted on the moving device 24. The moving device 24 includes: a stator 241; multiple stators 241 are arranged in a row on the measuring platform 4; a first mover 242 and a second mover 245 are mounted on the stator 241; the first mover 242 and the second mover 245 are mounted on the measuring platform 4 via a double guide rail pair 243; the tailstock clamping device 23 is mounted on the second mover 245; and the nut clamping device 25 is mounted on the first mover 242. A pneumatic guide rail clamp 244 is provided on the first mover 242 and / or the second mover 245. The tailstock clamping device 23 includes: a bearing support 2314, which is mounted on the moving device 24. A housing end cover 2313 is mounted on the bearing support 2314, and a housing 234 is mounted on the housing end cover 2313. A fixing plate 2310 is provided inside the housing 234. A plurality of linear bearings 239 are arranged in a circumferential array on the fixing plate 2310. A guide shaft 238 is provided inside the linear bearings 239. A sliding plate 2312 is provided at one end of the guide shaft 238. A second spring 2311 is fitted on the guide shaft 238 and is positioned between the sliding plate 2312 and the fixing plate 2310. A cylinder 2315 is mounted on the bearing support 2314 or the moving device 24. A cylinder push block 2316 is mounted on the output end of the cylinder 2315, and the cylinder push block 2316 contacts the sliding plate 2312. A push rod 237 is hinged to the other end of the guide shaft 238. Multiple sliding grooves are arranged in a circumferential array on the end face of the outer casing 234. An optical shaft 232 is mounted within each sliding groove. A gripper 231 is slidably mounted on the optical shaft 232. A first spring 233 is fitted onto the optical shaft 232 to drive the gripper 231 to radially reset. A gripper connecting rod 236 is mounted on the gripper 231, and the other end of the gripper connecting rod 236 is hinged to the other end of the push rod 237. Multiple ball bearings 235 are embedded in the inner wall of the sliding groove. A buffer layer is provided on the gripper 231. The nut clamping device 25 includes: a rotary cylinder 251, which is mounted on the first moving part 242. The output end of the rotary cylinder 251 is connected to a first electric gripper 253 via a connecting block 252. A first V-shaped block 254 is provided on the first electric gripper 253.The detection module 3 includes: a vibration monitoring sensor 34, which is mounted on the first V-block 254; a laser interferometer measuring mirror 33 and a temperature sensor 35 are mounted on the second mover 245; a digital display pressure sensor 31 is mounted on the pneumatic three-jaw chuck 22; and a laser interferometer reference mirror 32, which cooperates with the laser interferometer measuring mirror 33, is mounted on the measuring platform 4. The transmission module 1 includes: a gantry conveyor 11, with a clamping device 12 at its output end; a feeding platform 13 is located below the gantry conveyor 11; and multiple lead screw placement seats 14 for supporting the lead screw and multiple lead screw sensing devices 15 for measuring the lead screw length are mounted on the feeding platform 13. The clamping device 12 includes: a second electric gripper 121, with a second V-block 122 at its output end.

[0029] The measurement platform 4 serves as the fundamental support structure for the entire testing equipment, providing a stable mounting platform for the drive clamping module 2 and the testing module 3. It features vibration isolation, effectively reducing the interference of external vibrations on the testing process and ensuring testing accuracy. The vibration isolation characteristics guarantee the relative stability of each component during testing, avoiding measurement errors caused by vibration, and enabling precision testing instruments such as laser interferometers to accurately measure the displacement of the ball screw, improving the accuracy of backlash measurement. A stable mounting platform helps extend the equipment's service life and reduces wear and damage to components caused by vibration. The direct-drive motor 21 of the drive clamping module 2 provides the power source for the rotational movement of the ball screw. By driving the pneumatic three-jaw chuck 22, it drives the ball screw to rotate, causing the nut to move linearly, thus simulating the motion state of the ball screw in actual operation for backlash detection. The direct-drive motor 21 has high transmission efficiency and response speed, enabling fast and precise drive control, ensuring the stability and accuracy of the ball screw's rotational movement during testing, thereby improving the accuracy and efficiency of backlash detection. A pneumatic three-jaw chuck 22 clamps the left end of the ball screw, ensuring that one end of the ball screw is fixed during testing, allowing it to rotate stably under the drive of the direct-drive motor. The chuck jaws are made of soft metal, effectively preventing scratches on the ball screw surface during clamping and protecting the ball screw's accuracy and surface quality. Stable clamping ensures the concentricity of the ball screw during rotation, avoiding measurement errors caused by loose clamping or eccentricity. The soft metal jaws protect the ball screw, reducing damage to the ball screw itself during testing, increasing its service life, and ensuring the reliability of the test results. The tailstock clamping device 23 moves to the right end of the ball screw via the moving device 24 for clamping, cooperating with the pneumatic three-jaw chuck 22 to jointly fix the ball screw and ensure its stability during testing. The jaws 231 are made of soft metal or have an external buffer layer to prevent scratching the ball screw. This device can clamp ball screws with different end structures, improving the equipment's versatility. It can adapt to the clamping requirements of ball screws of various specifications, eliminating the need for special fixtures for ball screws with different end structures, thus reducing equipment costs and fixture management difficulties. Stable clamping ensures the positional accuracy of the ball screw during testing, improving the accuracy and reliability of backlash detection. The moving device 24 consists of multiple stators 241, a first mover 242, a second mover 245, a double guide rail pair 243, and a pneumatic guide rail clamp 244, providing precise movement guidance and power transmission for the tailstock clamping device 23 and the nut clamping device 25. This allows the tailstock clamping device 23 to accurately move to the right end of the ball screw for clamping, and the nut clamping device 25 to move to the nut position for clamping, ensuring stable movement of each device during testing.High-precision moving guides ensure the positioning accuracy of the tailstock clamping device and the nut clamping device, guaranteeing accurate clamping of ball screws and nuts of different specifications, thus improving the equipment's adaptability to different ball screw specifications and testing efficiency. The pneumatic guide rail clamp 244 fixes the tailstock clamping device 23 after clamping, preventing it from shifting during testing, further improving testing stability and accuracy. The nut clamping device 25 moves to the nut of the ball screw to be tested via the moving device 24 for clamping, driving the nut to perform linear motion during testing. The rotary cylinder 251 controls the rotation angle of the first electric gripper 253, enabling it to adapt to nut clamping requirements at different positions. The first V-block 254 is mounted on the first electric gripper 253, allowing it to clamp different types of nuts, improving the equipment's versatility. It can efficiently clamp different types of nuts, ensuring that the nut can stably follow the rotation of the ball screw in linear motion during testing, providing a guarantee for accurate measurement of the ball screw backlash. This improves the equipment's ability to test ball screws of different specifications, reduces the time and cost of changing fixtures due to different nut models, and increases testing efficiency. The digital display pressure sensor 31 of the testing module 3 is mounted on the pneumatic three-jaw chuck 22, which monitors and controls the clamping force of the chuck 22 in real time. When measuring ball screws of different specifications, it ensures that the clamping force of the chuck is moderate, preventing the ball screw from loosening during testing while also preventing damage due to excessive clamping force. Precise clamping force control ensures the stability of the ball screw during testing, avoids measurement errors caused by improper clamping force, and improves the accuracy of backlash detection. The digital display function allows operators to intuitively understand the clamping force, facilitating timely adjustments and enhancing the equipment's operational convenience. The laser interferometer reference mirror 32 and laser interferometer measuring mirror 33 are also included. The laser interferometer measuring mirror 33 is mounted on the nut clamping device 25 and moves with the nut. The laser interferometer reference mirror 32 is fixed to one side of the measuring platform 4 and aligned with the laser interferometer measuring mirror 33. The backlash value of the ball screw is calculated by measuring the displacement of the ball screw nut during forward and reverse motion using the principle of laser interferometry. The laser interferometer has high-precision displacement measurement capabilities, accurately measuring even minute displacements of the nut, providing reliable data support for accurate calculation of the ball screw backlash. Multiple measurements of the forward and reverse displacement differences and averaging effectively eliminate random errors, improving the accuracy and reliability of backlash measurement. A vibration monitoring sensor 34 is mounted on the first V-block 254 to monitor vibration in real time during the detection process. Data processing compensates for vibration interference in real time, reducing the impact of vibration on the measurement results. This effectively reduces vibration interference in backlash measurement and improves measurement accuracy. Even in complex working environments or when vibration exists during equipment operation, the accuracy of the detection results is guaranteed, enhancing the equipment's anti-interference capability. A temperature sensor 35 is aligned with the ball screw to monitor the temperature rise of the ball screw during the detection process.Compensation for thermal expansion errors based on temperature changes ensures that measurement results are unaffected by temperature factors. Precise temperature monitoring and thermal expansion error compensation improve the accuracy of backlash measurement. Under different temperature environments, it effectively eliminates the influence of temperature on ball screw dimensions, guaranteeing the reliability and stability of the test results. The gantry conveyor 11 of the transmission module 1 controls the clamping device 12 to move in the X, Y, and Z directions, realizing the picking up, unloading, and transfer of the ball screw under test between different workstations. The X and Y axes are composed of linear motors and guide rail pairs, providing high-precision horizontal movement; the Z axis is composed of KA modules, realizing vertical movement. High-precision multi-axis motion control enables the clamping device to quickly and accurately clamp and transport ball screws, improving the automation level and testing efficiency of the equipment. It can work collaboratively with other modules to achieve automated flow of the entire testing process, reducing manual intervention and improving the consistency and accuracy of testing. The clamping device 12 consists of a second electric gripper 121 and a second V-block 122, clamping ball screws of different specifications. The second electric gripper 121 provides clamping force, and the second V-block 122 contacts the ball screw surface to ensure clamping stability. After the ball screw under test is sensed by the screw sensing device 15, the clamping device 12 clamps it according to the information. It can adapt to the clamping requirements of ball screws of different specifications without the need to change special fixtures, improving the equipment's versatility and testing efficiency. The stable clamping effect ensures the safety of the ball screw during transportation, preventing it from falling or being damaged, and also provides a good foundation for subsequent clamping and testing work. The unloading platform 13 places the ball screw under test, providing a temporary storage location. Located below the gantry conveyor 11, it facilitates material handling by the clamping device 12. The reasonable layout design facilitates the placement and retrieval of ball screws by operators, improving work efficiency. It provides a stable storage platform for the ball screws, preventing them from being damaged or deformed while waiting for testing. Screw placement seats 14 are installed at certain intervals on the feeding table 13 to support the ball screw to be tested, ensuring its stability during placement and preventing it from rolling or tipping over. This stable support ensures the correct placement of the ball screw on the feeding table, facilitating accurate length measurement by the screw sensing device 15 and preventing damage caused by improper placement, thus providing assurance for subsequent testing. The screw sensing device 15 is installed adjacent to the screw placement seats 14 on the feeding table 13, maintaining axial centerline alignment. Its photoelectric sensor senses the length of the ball screw to be tested, providing the clamping device 12 with the necessary dimensional information for clamping. This accurate length sensing function allows the clamping device 12 to adaptively clamp according to the actual length of the ball screw, improving clamping accuracy and efficiency and avoiding testing errors or equipment damage caused by improper clamping.

[0030] Work process

[0031] Material loading stage: The operator places the ball screw to be tested on the screw placement seat 14 of the feeding platform 13. The screw sensing device 15 senses the length of the ball screw to be tested through a photoelectric sensor and transmits the information to the control system. According to the screw length information, the control system controls the gantry conveyor 11 to move the clamping device 12 to a suitable position. The electric gripper 121 of the clamping device 12 drives the second V-block 122 to clamp the ball screw, and then the gantry conveyor 11 moves the clamping device 12 holding the ball screw above the pneumatic three-jaw chuck 22 of the drive clamping module 2.

[0032] Clamping Stage: The gantry conveyor 11 lowers the clamping device 12, aligning the left end of the ball screw with the center of the pneumatic three-jaw chuck 22, which then clamps the left end of the ball screw. At this time, the tailstock clamping device 23 and the nut clamping device 25 begin to move via the moving device 24. The cylinder 2315 in the tailstock clamping device 23 pushes the cylinder push block 2316, causing the sliding plate 2312 to slide forward along the guide shaft 238, compressing the second spring 2311, and causing the jaws 231 to open outward along the optical axis 232. When the tailstock clamping device 23 moves to the appropriate position on the right end of the ball screw, the cylinder 2315 retracts. Under the action of the second spring 2311 and the first spring 233, the jaws 231 clamp the right end of the ball screw inward, while the pneumatic guide rail clamp 244 secures the tailstock clamping device 23 to prevent it from shifting. Next, the nut clamping device 25 moves to the nut of the ball screw to be tested via the moving device 24, the rotary cylinder 251 rotates 90°, and the electric gripper 253 drives the first V-block 254 to clamp the nut, thus completing the clamping.

[0033] Testing Phase: After clamping, the direct drive motor 21 drives the pneumatic three-jaw chuck 22 to rotate the ball screw under test. At this time, the cylinder 2315 in the tailstock clamping device 23 does not follow the rotation; only the bearing clamping part of the bearing support 2314 clamps the ball screw under test and rotates with it. The nut clamping device 25 clamps the nut and moves linearly. The testing module 3 starts working. The digital display pressure sensor 31 detects and controls the clamping force of the pneumatic three-jaw chuck 22; the laser interferometer measuring mirror 33, vibration monitoring sensor 34, and temperature sensor 35 move with the nut. The laser interferometer reading is reset to zero. First, a forward displacement measurement is performed. The controller drives the motor to make the ball screw nut move forward at a uniform speed. The laser interferometer records the displacement during the movement in real time and stores the final forward displacement value D1. Then, a reverse displacement measurement is performed. The motor is driven in the reverse direction to make the nut return to its initial position at a uniform speed. The laser interferometer records the actual displacement value D2 of the reverse movement. If backlash exists, the reverse displacement will be less than the forward displacement; the difference is the backlash value, where backlash = |D1 - D2|. Repeat the forward and reverse motion 3-5 times and take the average value to eliminate random errors. Vibration monitoring sensor 34 compensates for vibration interference in real time through data processing, and temperature sensor 35 monitors the temperature rise of the ball screw to compensate for thermal expansion errors.

[0034] Test Result Output Stage: After the test is completed, the measurement results are displayed on the data display 5 through the data acquisition and processing system, providing data for operators to determine whether the ball screw can be used normally. Based on the test results, the operators take appropriate action on the ball screw; qualified ball screws continue to be used, while unqualified ones are repaired or scrapped. Afterwards, the clamping device 12 releases the ball screw, and the gantry conveyor 11 moves the clamping device 12 back to its initial position, awaiting the next loading and testing.

[0035] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and all such equivalent transformations fall within the protection scope of the present invention.

Claims

1. An automatic ball screw backlash detection device, comprising: A measuring platform (4) is provided with a drive clamping module (2) and a detection module (3). A transmission module (1) for transporting the lead screw is provided above the measuring platform (4). The drive clamping module (2) includes a direct drive motor (21), a tailstock clamping device (23) and a moving device (24) provided on the measuring platform (4). The output end of the direct drive motor (21) is provided with a pneumatic three-jaw chuck (22) for clamping both ends of the lead screw. The moving device (24) is provided with a nut clamping device (25).

2. The automatic ball screw backlash detection device according to claim 1, characterized in that, The moving device (24) includes: a stator (241), a plurality of stators (241) are arranged in a row on the measuring platform (4), a first mover (242) and a second mover (245) are provided on the stator (241), the first mover (242) and the second mover (245) are mounted on the measuring platform (4) through a double guide rail pair 243, a tailstock clamping device (23) is provided on the second mover (245), and a nut clamping device (25) is provided on the first mover (242).

3. The automatic ball screw backlash detection device according to claim 2, characterized in that, A pneumatic guide rail clamp (244) is provided on the first mover (242) or / and the second mover (245).

4. An automatic ball screw backlash detection device according to claim 1 or 2, characterized in that, The tailstock clamping device (23) includes: a bearing support (2314), which is mounted on the moving device (24). A housing end cap (2313) is mounted on the bearing support (2314), and a housing (234) is mounted on the housing end cap (2313). A fixing plate (2310) is disposed inside the housing (234). Multiple linear bearings (239) are arranged in a circumferential array on the fixing plate (2310). A guide shaft (238) is disposed inside each linear bearing (239). A sliding plate (2312) is disposed at one end of the guide shaft (238). A second spring (2311) is fitted onto the guide shaft (238). The second spring (2311) is positioned between the sliding plate (2312) and the fixing plate (2310). A cylinder (2315) is provided on the bearing support (2314) or the moving device (24). A cylinder push block (2316) is provided at the output end of the cylinder (2315). The cylinder push block (2316) is in contact with the sliding plate (2312). A push rod (237) is hinged to the other end of the guide shaft (238). A plurality of sliding slots are arranged in a circumferential array on the end face of the outer shell (234). An optical axis (232) is provided in the sliding slot. A gripper (231) is slidably provided on the optical axis (232). A first spring (233) for driving the gripper (231) to radially reset is fitted on the optical axis (232). A gripper connecting rod (236) is provided on the gripper (231). The other end of the gripper connecting rod (236) is hinged to the other end of the push rod (237).

5. The automatic ball screw backlash detection device according to claim 4, characterized in that, The inner wall of the sliding groove is fitted with a plurality of balls (235).

6. The automatic ball screw backlash detection device according to claim 4, characterized in that, A buffer layer is provided on the gripper (231).

7. The automatic ball screw backlash detection device according to claim 2, characterized in that, The nut clamping device (25) includes: a rotary cylinder (251), which is mounted on the first mover (242). The output end of the rotary cylinder (251) is connected to a first electric gripper (253) via a connecting block (252). A first V-block (254) is provided on the first electric gripper (253).

8. The automatic ball screw backlash detection device according to claim 7, characterized in that, The detection module (3) includes: a vibration monitoring sensor (34), which is installed on the first V-block (254); a laser interferometer measuring mirror (33) and a temperature sensor (35) are provided on the second mover (245); a digital display pressure sensor (31) is installed on the pneumatic three-jaw chuck (22); and a laser interferometer reference mirror (32) that cooperates with the laser interferometer measuring mirror (33) is provided on the measuring platform (4).

9. The automatic ball screw backlash detection device according to claim 1, characterized in that, The transmission module (1) includes: a gantry conveyor (11), the output end of which is provided with a clamping device (12), and a feeding platform (13) is provided below the gantry conveyor (11). The feeding platform (13) is provided with a plurality of screw placement seats (14) for supporting the screw and a plurality of screw sensing devices (15) for measuring the length of the screw.

10. The automatic ball screw backlash detection device according to claim 9, characterized in that, The clamping device (12) includes: a second electric gripper (121), and a second V-block (122) is provided at the output end of the second electric gripper (121).

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