A ball screw pair torsional rigidity testing device and testing method thereof

Abstract

The present invention discloses a ball screw pair torsional rigidity testing device and a testing method thereof, which relates to the technical field of ball screw pair torsional rigidity testing, and comprises a test box, a fixing seat and a nut fixer, wherein the inner bottom wall of the test box is fixedly installed with a fixing seat by bolts, and the front end of the top of the fixing seat is installed with a nut fixer. The present invention can clamp and restrict the ball nut through the setting of a first hydraulic telescopic cylinder and a clamping block, and the auxiliary fixing component is conducive to improving the stability of the clamped ball nut. Through the setting of the monitoring component, the camera can obtain the picture and video data of the fixing hole, and transmit it to the picture recognition processing module through the wireless sending module, and then measure the positioning and diameter data of the fixing hole. Through the central processing unit module and the PLC controller, the auxiliary fixing component is adjusted to automatically assist in restricting the ball nut, thereby improving the portability of the test device.

Description

Technical Field

[0001] The invention relates to the technical field of ball screw pair torsional rigidity testing, and in particular to a ball screw pair torsional rigidity testing device and a testing method thereof. Background Art

[0002] The ball screw pair, also known as the ball screw pair or ball screw pair, is composed of a screw and a nut. It is the most accurate and most commonly used transmission device in current transmission machinery. Torsional rigidity, also known as torsional stiffness, describes the ability of a material or structure to resist elastic deformation when subjected to torsional force. The torsional rigidity test device is used to evaluate the ball screw pair's ability to resist deformation when subjected to torsional force.

[0003] The defects of the existing ball screw pair torsional rigidity testing device are:

[0004] 1. Patent document US3720116A discloses a method for arranging a ball propeller assembly and manufacturing a ball propeller. However, in the above document, when fixing the nut of the ball screw pair, since the nut of the ball screw pair has various sizes and shapes, it is relatively cumbersome to clamp and fix it, which easily leads to a technical problem of reduced test efficiency;

[0005] 2. Patent document KR20120010766A discloses a small impact tester, but the test device in the above document can only fix the nut of a ball screw pair of one size, which easily leads to the technical problem of a small application range of the test device;

[0006] 3. Patent document CN205503898U discloses a reinforced internally cooled ball screw device, but the above document only performs detection at room temperature, which results in a technical problem that the data obtained is not accurate enough;

[0007] 4. Patent document CN110207981B discloses a non-destructive ball screw pair static stiffness measurement device. However, in the above document, during the test process, the fixation of the ball screw pair is relatively cumbersome and unstable. Summary of the invention

[0008] The object of the present invention is to provide a ball screw pair torsional rigidity testing device and a testing method thereof, so as to solve the technical problems raised in the above-mentioned background technology.

[0009] To achieve the above object, the present invention provides the following technical solution: a ball screw pair torsional rigidity test device, comprising a test box, a fixing seat and a nut fixer, wherein the inner bottom wall of the test box is fixedly mounted with the fixing seat by bolts, and the front end of the top of the fixing seat is mounted with the nut fixer;

[0010] The nut fixer includes a fixing frame, and the fixing frame is installed at the front end of the top of the fixing seat by bolts, a group of first hydraulic telescopic cylinders are installed at the tail end of the inner wall of the fixing frame, a clamping block is installed at the output end of the first hydraulic telescopic cylinder, and the inner wall of the clamping block clamps the ball nut, and a plurality of fixing holes are opened on the outer side of the front side of the ball nut;

[0011] An auxiliary fixing component and a monitoring component are installed at the front end of the inner wall of the fixing frame, the auxiliary fixing component is used to improve the stability of the ball nut fixing, the monitoring component is used to obtain pictures and video data of the fixing hole, the monitoring component includes a battery component, the battery component is electrically connected to the wireless transmission module and the camera respectively, the battery component is used to provide energy to the wireless transmission module and the camera, and the camera is electrically connected to the wireless transmission module;

[0012] The wireless transmission module is electrically connected to an image recognition processing module, the image recognition processing module is used to locate the position of the fixing hole and measure the diameter of the fixing hole, the image recognition processing module is electrically connected to a central processing unit module, and the central processing unit module is electrically connected to a PLC controller;

[0013] Preferably, the auxiliary fixing assembly includes a second hydraulic telescopic cylinder, a fixing box is installed at the output end of the second hydraulic telescopic cylinder, a first servo motor is installed at the output end of the first servo motor, a limiting disk is installed at the output end of the first reducer, a camera is embedded in the middle of the front side of the limiting disk, and a battery assembly and a wireless sending module are respectively installed on the outer side of the back side of the limiting disk, a plurality of electric telescopic fixing columns are embedded in the outer side of the front side of the limiting disk, and the diameters of the electric telescopic fixing columns are different, a plurality of limiting holes are opened on the outer wall of the limiting disk, a hydraulic telescopic rod is movably connected to the inner wall of the limiting hole, a third hydraulic telescopic cylinder is installed at one end of the hydraulic telescopic rod, and the outer wall of the third hydraulic telescopic cylinder is embedded in the inner wall of the fixing box.

[0014] Preferably, an observation window is provided in the middle of the top of the test box, a box door is installed on one side of the test box through a rotating shaft, a control console is installed on one side of the top of the test box, a touch screen is embedded on the top of the console, and the touch screen is electrically connected to the central processing unit module in a bidirectional manner. The touch screen is used to display and control the central processing unit module to obtain data and issue instructions.

[0015] Preferably, a heater is installed on the front of the test box, a compressor-type refrigerator is installed on the back of the test box, and both the heater and the compressor-type refrigerator are electrically connected to the PLC controller. A temperature sensor is installed on one side of the top wall of the test box, and the temperature sensor is electrically connected to the central processing unit module.

[0016] Preferably, a slide groove is provided on the top of the fixed seat, a slider is installed on the inner wall of the slide groove, a first threaded rod is installed through a thread on one end of the slider, and one end of the first threaded rod is movably connected to the inner wall of the slide groove, the other end of the first threaded rod passes through the inner wall of the slide groove and a second servo motor is installed, and the second servo motor is installed on one side of the fixed seat.

[0017] Preferably, a fixed plate is installed on the top of the slider, a third servo motor is installed at the tail end of the top of the fixed plate, a second reducer is installed at the output end of the third servo motor, a torque sensor is installed at the output end of the second reducer, and the torque sensor is electrically connected to the central processing unit module, a coupling is installed at one end of the torque sensor, a ball screw pair is installed at one end of the coupling, and the front end of the outer wall of the ball screw pair is installed on the inner wall of the ball nut.

[0018] Preferably, a torsion angle measuring instrument is installed at the front middle part and the rear end of the outer wall of the ball screw pair, and the torsion angle measuring instrument is used to measure the torsion angle generated when the ball screw pair is subjected to a torsional torque.

[0019] Preferably, a support plate is installed at the other end of the top of the fixed seat, a group of fixing blocks are installed at one end of the support plate, a second threaded rod is installed through a thread on one side of the fixing block, an arc-shaped clamping plate is movably connected to one end of the second threaded rod, and the clamping surface of the arc-shaped clamping plate is movably connected to one end of the outer wall of the ball screw pair, a connecting groove is opened on one side of the arc-shaped clamping plate, a connecting block is movably connected to the inner wall of the connecting groove, and one end of the connecting block is fixedly connected to one end of the second threaded rod.

[0020] Preferably, the test steps of the ball screw pair torsional rigidity test device are as follows:

[0021] S1. Through the setting of the monitoring component, the camera can obtain the picture and video data of the fixing hole, and transmit it to the picture recognition processing module through the wireless transmission module, and then measure the positioning and diameter data of the fixing hole. Through the central processing unit module and the PLC controller, the auxiliary fixing component is adjusted to automatically assist in limiting the ball nut;

[0022] S2. According to the obtained positioning data of the fixing hole, the second hydraulic telescopic cylinder is regulated to adjust the position of the fixing box and the limiting disk. According to the diameter data, the first servo motor and the first reducer are regulated to adjust the rotation of the limiting disk, and the electric telescopic fixing column with a diameter that meets the standard is inserted into the fixing hole.

[0023] S3, the third hydraulic telescopic cylinder drives the hydraulic telescopic rod to insert into the limiting hole, thereby completing the restriction of the ball nut;

[0024] S4. During the test, the temperature in the test box can be adjusted by setting up a heater, a compressor-type refrigerator and a temperature sensor, and accurate temperature change data can be obtained through the temperature sensor, so that the torsional rigidity of the ball screw pair can be tested under different temperature conditions;

[0025] S5. The second servo motor drives the first threaded rod to rotate and then adjust the movement of the slider and the fixed plate. The ball screw pair and the torque sensor are connected to each other by using a coupling, and then the position of the fixed plate is adjusted in conjunction with the setting of the support plate, so that the two ends of the ball screw pair can be constrained. The torsional rigidity of the ball screw pair is tested by using the setting of the third servo motor, the second reducer, the torque sensor and the torsion angle measuring instrument in conjunction with the nut fixer.

[0026] Preferably, the step S3 further includes the following steps:

[0027] S31. By disposing a plurality of electric telescopic fixing columns of different diameters and a second hydraulic telescopic cylinder, ball nuts of various sizes can be restricted.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention can clamp and restrict the ball nut through the arrangement of the first hydraulic telescopic cylinder and the clamping block, and the auxiliary fixing component is conducive to improving the stability of the clamped ball nut. Through the arrangement of the monitoring component, the camera can obtain the picture and video data of the fixing hole, and transmit it to the picture recognition processing module through the wireless transmission module, and then measure the location and diameter data of the fixing hole. Through the central processing unit module and the PLC controller, the auxiliary fixing component is regulated to automatically assist in restricting the ball nut, thereby improving the portability of the test device;

[0030] 2. The present invention uses a central processing unit module and a PLC controller to adjust the positions of the second hydraulic telescopic cylinder to adjust the fixing box and the limiting disk according to the obtained positioning data of the fixing hole, and adjusts the first servo motor and the first reducer to adjust the rotation of the limiting disk according to the diameter data, inserts the electric telescopic fixing column with a qualified diameter into the fixing hole, and then drives the hydraulic telescopic rod to be inserted into the limiting hole through the third hydraulic telescopic cylinder, thereby completing the restriction of the ball nut, and through the arrangement of a plurality of electric telescopic fixing columns and second hydraulic telescopic cylinders with different diameters, it is possible to restrict ball nuts of various sizes, thereby improving the applicability and convenience of the test device;

[0031] 3. The present invention can adjust the temperature in the test box by setting a heater, a compressor-type refrigerator and a temperature sensor, and obtain accurate temperature change data through the temperature sensor. The observation window is convenient for test personnel to monitor and has a protective effect, and the torsional rigidity of the ball screw pair can be tested under different temperature conditions, thereby improving the accuracy and diversity of the test data obtained;

[0032] 4. The present invention drives the first threaded rod to rotate through the second servo motor to adjust the movement of the slider and the fixed plate, connects the ball screw pair and the torque sensor with each other through the use of a coupling, and then cooperates with the setting of the support plate to adjust the position of the fixed plate, so as to constrain the two ends of the ball screw pair, and cooperates with the nut fixer to improve the installation stability of the ball screw pair. Then, the third servo motor, the second reducer, the torque sensor and the torsion angle measuring instrument are used to improve the accuracy of the torsional rigidity test of the ball screw pair. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the software flow of the present invention;

[0034] Figure 2 It is a schematic diagram of the overall structure of the test box of the present invention;

[0035] Figure 3 It is a schematic diagram of the overall structure of the fixing seat of the present invention;

[0036] Figure 4 It is a schematic diagram of the ball screw pair structure of the present invention;

[0037] Figure 5 It is a schematic diagram of the planetary column structure of the present invention;

[0038] Figure 6 It is a front structural schematic diagram of the nut fixer of the present invention;

[0039] Figure 7 It is a schematic diagram of a top cross-sectional structure of a nut fixer of the present invention;

[0040] Figure 8 It is a schematic diagram of the support plate structure of the present invention;

[0041] Fig. 9 It is a schematic diagram of the test process of the present invention.

[0042] In the figure: 1. test box; 2. fixing seat; 3. nut fixer; 4. fixing frame; 5. first hydraulic telescopic cylinder; 6. clamping block; 7. ball nut; 8. fixing hole; 9. battery assembly; 10. wireless transmission module; 11. camera; 12. image recognition processing module; 13. central processing unit module; 14. PLC controller; 16. second hydraulic telescopic cylinder; 17. fixing box; 18. first servo motor; 19. first reducer; 20. limiting disk; 21. electric telescopic fixing column; 23. observation window; 24. box door; 25. control console; 26. touch display display screen; 27. heater; 28. compressor refrigerator; 29. ​​temperature sensor; 30. slide groove; 31. slider; 32. first threaded rod; 33. second servo motor; 34. fixing plate; 35. third servo motor; 36. second reducer; 37. torque sensor; 38. coupling; 39. ball screw pair; 40. torsion angle measuring instrument; 41. support plate; 42. fixing block; 43. second threaded rod; 44. arc clamping plate; 45. limiting hole; 46. hydraulic telescopic rod; 47. third hydraulic telescopic cylinder; 48. connecting groove; 49. connecting block. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Example 1: Please refer to Figure 1 , Figure 5 and Figure 6 , an embodiment of the present invention provides: a ball screw pair torsional rigidity test device, comprising a test box 1, a fixing seat 2 and a nut fixer 3, the inner bottom wall of the test box 1 is fixed with the fixing seat 2 by bolts, and the front end of the top of the fixing seat 2 is installed with the nut fixer 3;

[0047] The nut fixer 3 includes a fixing frame 4, and the fixing frame 4 is installed at the front end of the top of the fixing seat 2 by bolts. A set of first hydraulic telescopic cylinders 5 are installed at the tail end of the inner wall of the fixing frame 4. A clamping block 6 is installed at the output end of the first hydraulic telescopic cylinder 5. The inner wall of the clamping block 6 clamps a ball nut 7. A plurality of fixing holes 8 are opened on the outer side of the front of the ball nut 7.

[0048] An auxiliary fixing component and a monitoring component are installed at the front end of the inner wall of the fixing frame 4. The auxiliary fixing component is used to improve the stability of the ball nut 7. The monitoring component is used to obtain pictures and video data of the fixing hole 8. The monitoring component includes a battery component 9. The battery component 9 is electrically connected to a wireless transmission module 10 and a camera 11 respectively. The battery component 9 is used to provide energy to the wireless transmission module 10 and the camera 11, and the camera 11 is electrically connected to the wireless transmission module 10.

[0049] The wireless transmission module 10 is electrically connected to a picture recognition processing module 12, the picture recognition processing module 12 is used to locate the position of the fixing hole 8 and measure the diameter of the fixing hole 8, the picture recognition processing module 12 is electrically connected to a central processing unit module 13, and the central processing unit module 13 is electrically connected to a PLC controller 14;

[0050] Furthermore, by setting the first hydraulic telescopic cylinder 5 and the clamping block 6, the ball nut 7 can be clamped and restricted. The auxiliary fixing component is beneficial to improving the stability of the clamped ball nut 7. By setting the monitoring component, the camera 11 can obtain the picture and video data of the fixing hole 8, and transmit it to the picture recognition processing module 12 through the wireless sending module 10, and then measure the positioning and diameter data of the fixing hole 8. Through the central processing unit module 13 and the PLC controller 14, the auxiliary fixing component is adjusted to automatically assist in restricting the ball nut 7, thereby improving the portability of the test device.

[0051] Example 2: Please refer to Figure 3 , Figure 5 , Figure 6 and Figure 7, an embodiment provided by the present invention: the auxiliary fixing component includes a second hydraulic telescopic cylinder 16, a fixing box 17 is installed at the output end of the second hydraulic telescopic cylinder 16, a first servo motor 18 is installed on the inner wall of the fixing box 17, a first reducer 19 is installed at the output end of the first servo motor 18, a limiting disk 20 is installed at the output end of the first reducer 19, and a camera 11 is embedded in the middle of the front of the limiting disk 20, and a battery assembly 9 and a wireless transmission module 10 are respectively installed on the outer side of the back of the limiting disk 20, a plurality of electric telescopic fixing columns 21 are embedded on the outer side of the front of the limiting disk 20, and the diameters of the electric telescopic fixing columns 21 are different, a plurality of limiting holes 45 are opened on the outer wall of the limiting disk 20, a hydraulic telescopic rod 46 is movably connected to the inner wall of the limiting hole 45, a third hydraulic telescopic cylinder 47 is installed at one end of the hydraulic telescopic rod 46, and the outer wall of the third hydraulic telescopic cylinder 47 is embedded in the inner wall of the fixing box 17;

[0052] Furthermore, through the central processing unit module 13 and the PLC controller 14, according to the obtained positioning data of the fixing hole 8, the second hydraulic telescopic cylinder 16 is controlled to adjust the position of the fixing box 17 and the limiting disk 20, and according to the diameter data, the first servo motor 18 and the first reducer 19 are controlled to adjust the rotation of the limiting disk 20, and the electric telescopic fixing column 21 with a qualified diameter is inserted into the fixing hole 8, and then the hydraulic telescopic rod 46 is driven by the third hydraulic telescopic cylinder 47 to be inserted into the limiting hole 45, thereby completing the restriction of the ball nut 7, and through the arrangement of a plurality of electric telescopic fixing columns 21 with different diameters and the second hydraulic telescopic cylinder 16, ball nuts 7 of various sizes can be restricted, thereby improving the applicability and convenience of the testing device.

[0053] Example 3: Please refer to Figure 1 and Figure 2 , an embodiment provided by the present invention: an observation window 23 is provided in the middle of the top of the test box 1, a box door 24 is installed on one side of the test box 1 through a rotating shaft, a control console 25 is installed on one side of the top of the test box 1, a touch screen 26 is embedded and installed on the top of the control console 25, and the touch screen 26 is connected to the central processing unit module 13 through a bidirectional electrical connection, and the touch screen 26 is used to display and control the central processing unit module 13 to obtain data and send instructions;

[0054] A heater 27 is installed on the front of the test box 1, a compressor type refrigerator 28 is installed on the back of the test box 1, and the heater 27 and the compressor type refrigerator 28 are both electrically connected to the PLC controller 14, and a temperature sensor 29 is installed on one side of the top wall of the test box 1, and the temperature sensor 29 is electrically connected to the central processing unit module 13;

[0055] Furthermore, by providing a heater 27, a compressor-type refrigerator 28 and a temperature sensor 29, the temperature in the test box 1 can be adjusted, and accurate temperature change data can be obtained through the temperature sensor 29. The observation window 23 is convenient for test personnel to monitor and provide protection, and the torsional rigidity of the ball screw pair 39 can be tested under different temperature conditions, thereby improving the accuracy and diversity of the test data obtained.

[0056] Example 4: Please refer to Figure 3 , Figure 4 and Figure 8 , an embodiment provided by the present invention: a slide groove 30 is opened on the top of the fixed seat 2, a slider 31 is installed on the inner wall of the slide groove 30, a first threaded rod 32 is installed through a thread at one end of the slider 31, and one end of the first threaded rod 32 is movably connected to the inner wall of the slide groove 30, and the other end of the first threaded rod 32 penetrates the inner wall of the slide groove 30 to install a second servo motor 33, and the second servo motor 33 is installed on one side of the fixed seat 2;

[0057] A fixing plate 34 is installed on the top of the slider 31, a third servo motor 35 is installed at the tail end of the top of the fixing plate 34, a second reducer 36 is installed at the output end of the third servo motor 35, a torque sensor 37 is installed at the output end of the second reducer 36, and the torque sensor 37 is electrically connected to the central processing unit module 13, a coupling 38 is installed at one end of the torque sensor 37, a ball screw pair 39 is installed at one end of the coupling 38, and the front end of the outer wall of the ball screw pair 39 is installed on the inner wall of the ball nut 7;

[0058] The front middle part and the rear end of the outer wall of the ball screw pair 39 are both installed with a torsion angle measuring instrument 40, and the torsion angle measuring instrument 40 is used to measure the torsion angle generated by the ball screw pair 39 when subjected to a torsion torque;

[0059] A support plate 41 is installed at the other end of the top of the fixed seat 2, and a group of fixed blocks 42 are installed at one end of the support plate 41. A second threaded rod 43 is installed through a thread on one side of the fixed block 42, and an arc-shaped clamping plate 44 is movably connected to one end of the second threaded rod 43, and the clamping surface of the arc-shaped clamping plate 44 is movably connected to one end of the outer wall of the ball screw pair 39. A connecting groove 48 is opened on one side of the arc-shaped clamping plate 44, and a connecting block 49 is movably connected to the inner wall of the connecting groove 48, and one end of the connecting block 49 is fixedly connected to one end of the second threaded rod 43;

[0060] Furthermore, the first threaded rod 32 is driven to rotate by the second servo motor 33 to adjust the movement of the slider 31 and the fixed plate 34. The ball screw pair 39 and the torque sensor 37 are connected to each other by using the coupling 38. The position of the fixed plate 34 is adjusted in conjunction with the setting of the support plate 41, so that the two ends of the ball screw pair 39 can be constrained and restricted. In conjunction with the nut fixer 3, the installation stability of the ball screw pair 39 can be improved. The third servo motor 35, the second reducer 36, the torque sensor 37 and the torsion angle measuring instrument 40 are used to improve the accuracy of the torsional rigidity test of the ball screw pair 39.

[0061] Example 5: Please refer to Fig. 9 , an embodiment provided by the present invention: the test steps of the ball screw pair torsional rigidity test device are as follows:

[0062] S1. Through the setting of the monitoring component, the camera 11 can obtain the picture and video data of the fixing hole 8, and transmit it to the picture recognition processing module 12 through the wireless transmission module 10, and then measure the positioning and diameter data of the fixing hole 8. Through the central processing unit module 13 and the PLC controller 14, the auxiliary fixing component is regulated to automatically assist in limiting the ball nut 7;

[0063] S2. According to the acquired positioning data of the fixing hole 8, the second hydraulic telescopic cylinder 16 is regulated to adjust the positions of the fixing box 17 and the limiting disk 20. According to the diameter data, the first servo motor 18 and the first reducer 19 are regulated to adjust the rotation of the limiting disk 20, and the electric telescopic fixing column 21 with a diameter that meets the standard is inserted into the fixing hole 8.

[0064] S3, the third hydraulic telescopic cylinder 47 drives the hydraulic telescopic rod 46 to be inserted into the limiting hole 45, thereby completing the restriction of the ball nut 7;

[0065] S4. During the test, the temperature in the test box 1 can be adjusted by setting the heater 27, the compressor refrigerator 28 and the temperature sensor 29, and accurate temperature change data can be obtained through the temperature sensor 29, so that the torsional rigidity of the ball screw pair 39 can be tested under different temperature conditions;

[0066] S5. The second servo motor 33 drives the first threaded rod 32 to rotate and then adjust the movement of the slider 31 and the fixed plate 34. The ball screw pair 39 and the torque sensor 37 are connected to each other by using the coupling 38. The position of the fixed plate 34 is adjusted in conjunction with the setting of the support plate 41, so that the two ends of the ball screw pair 39 can be constrained. In conjunction with the nut fixer 3, the third servo motor 35, the second reducer 36, the torque sensor 37 and the torsion angle measuring instrument 40 are used to test the torsional rigidity of the ball screw pair.

[0067] S3 also includes the following steps:

[0068] S31. By disposing a plurality of electric telescopic fixing columns 21 and a second hydraulic telescopic cylinder 16 with different diameters, it is possible to restrict ball nuts 7 of various sizes.

[0069] Working principle: through the setting of the first hydraulic telescopic cylinder 5 and the clamping block 6, the ball nut 7 can be clamped and restricted. The auxiliary fixing component is conducive to improving the stability of the clamped ball nut 7. Through the setting of the monitoring component, the camera 11 can obtain the picture and video data of the fixing hole 8, and transmit it to the picture recognition processing module 12 through the wireless sending module 10, and then measure the positioning and diameter data of the fixing hole 8. Through the central processing unit module 13 and the PLC controller 14, the auxiliary fixing component is adjusted to automatically assist in restricting the ball nut 7, thereby improving the portability of the test device. Through the central processing unit module 13 and the PLC controller 14, according to the obtained positioning data of the fixing hole 8, the second hydraulic telescopic cylinder 16 is regulated to adjust the position of the fixing box 17 and the limiting disk 20, and according to the diameter data, the first servo motor 18 and the first reducer 19 are regulated to adjust the rotation of the limiting disk 20, and the electric telescopic fixing column 21 with a qualified diameter is inserted into the fixing hole 8, and then the hydraulic telescopic rod 46 is driven by the third hydraulic telescopic cylinder 47 to be inserted into the limiting hole 45, thereby completing the restriction of the ball nut 7, and through a plurality of electric telescopic fixing columns 21 with different diameters and the second hydraulic telescopic cylinder 16 The setting can limit the ball nuts 7 of various sizes, thereby improving the applicability and convenience of the test device. Through the setting of the heater 27, the compressor refrigerator 28 and the temperature sensor 29, the temperature in the test box 1 can be adjusted, and accurate temperature change data can be obtained through the temperature sensor 29. The observation window 23 is convenient for the test personnel to monitor and play a protective effect, and the torsional rigidity of the ball screw pair 39 can be tested under different temperature conditions, thereby improving the accuracy and diversity of the test data obtained. 3 drives the first threaded rod 32 to rotate and then adjust the slider 31 and the fixing plate 34 to move. The ball screw pair 39 and the torque sensor 37 are connected to each other by using the coupling 38. The position of the fixing plate 34 is adjusted in conjunction with the setting of the support plate 41, so that the two ends of the ball screw pair 39 can be constrained. The nut fixer 3 is used to improve the installation stability of the ball screw pair 39. The third servo motor 35, the second reducer 36, the torque sensor 37 and the torsion angle measuring instrument 40 are used to improve the accuracy of the torsional rigidity test of the ball screw pair 39.

[0070] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A ball screw pair torsional rigidity testing device, comprising a test box (1), a fixing seat (2) and a nut fixing device (3), characterized in that: The inner bottom wall of the test box (1) is fixed with a fixing seat (2) by means of bolts, and a nut fixer (3) is installed at the front end of the top of the fixing seat (2); The nut fixer (3) comprises a fixing frame (4), and the fixing frame (4) is mounted on the front end of the top of the fixing seat (2) by means of bolts, a group of first hydraulic telescopic cylinders (5) are mounted on the rear end of the inner wall of the fixing frame (4), a clamping block (6) is mounted on the output end of the first hydraulic telescopic cylinder (5), and the inner wall of the clamping block (6) clamps a ball nut (7), and a plurality of fixing holes (8) are formed on the outer side of the front face of the ball nut (7); An auxiliary fixing component and a monitoring component are installed at the front end of the inner wall of the fixing frame (4), the auxiliary fixing component is used to improve the stability of the fixing of the ball nut (7), the monitoring component is used to obtain image and video data of the fixing hole (8), the monitoring component includes a battery component (9), the battery component (9) is electrically connected to the wireless transmission module (10) and the camera (11), the battery component (9) is used to provide energy to the wireless transmission module (10) and the camera (11), and the camera (11) is electrically connected to the wireless transmission module (10); The wireless transmission module (10) is electrically connected to an image recognition processing module (12), the image recognition processing module (12) is used to locate the position of the fixing hole (8) and measure the diameter of the fixing hole (8), the image recognition processing module (12) is electrically connected to a central processing unit module (13), and the central processing unit module (13) is electrically connected to a PLC controller (14); The auxiliary fixing assembly comprises a second hydraulic telescopic cylinder (16), a fixing box (17) is mounted on the output end of the second hydraulic telescopic cylinder (16), a first servo motor (18) is mounted on the inner wall of the fixing box (17), a first reducer (19) is mounted on the output end of the first servo motor (18), a limiting disk (20) is mounted on the output end of the first reducer (19), a camera (11) is embedded in the middle of the front of the limiting disk (20), and battery assemblies (11) are respectively mounted on the outer sides of the back of the limiting disk (20). 9) and a wireless transmission module (10), a plurality of electric telescopic fixing columns (21) are mounted on the outer side of the front side of the limiting disk (20), and the diameters of the electric telescopic fixing columns (21) are different, a plurality of limiting holes (45) are opened on the outer wall of the limiting disk (20), a hydraulic telescopic rod (46) is movably connected to the inner wall of the limiting hole (45), a third hydraulic telescopic cylinder (47) is mounted on one end of the hydraulic telescopic rod (46), and the outer wall of the third hydraulic telescopic cylinder (47) is mounted on the inner wall of the fixing box (17).

2. A ball screw pair torsional rigidity testing device according to claim 1, characterized in that: An observation window (23) is provided in the middle of the top of the test box (1); a box door (24) is installed on one side of the test box (1) via a rotating shaft; a control console (25) is installed on one side of the top of the test box (1); a touch screen (26) is embedded and installed on the top of the control console (25); the touch screen (26) is bidirectionally electrically connected to the central processing unit module (13); and the touch screen (26) is used to display and control the data acquired and the instructions issued by the central processing unit module (13).

3. A ball screw pair torsional rigidity testing device according to claim 1, characterized in that: A heater (27) is installed on the front of the test box (1), a compressor-type refrigerator (28) is installed on the back of the test box (1), and both the heater (27) and the compressor-type refrigerator (28) are electrically connected to the PLC controller (14). A temperature sensor (29) is installed on one side of the top wall of the test box (1), and the temperature sensor (29) is electrically connected to the central processing unit module (13).

4. A ball screw pair torsional rigidity testing device according to claim 1, characterized in that: The fixing seat (2) is provided with a slide groove (30) at the top, and a slider (31) is installed on the inner wall of the slide groove (30); a first threaded rod (32) is installed through a thread on one end of the slider (31), and one end of the first threaded rod (32) is movably connected to the inner wall of the slide groove (30); the other end of the first threaded rod (32) penetrates the inner wall of the slide groove (30) and is installed with a second servo motor (33); and the second servo motor (33) is installed on one side of the fixing seat (2).

5. A ball screw pair torsional rigidity testing device according to claim 4, characterized in that: A fixing plate (34) is installed on the top of the slider (31), a third servo motor (35) is installed at the tail end of the top of the fixing plate (34), a second reducer (36) is installed at the output end of the third servo motor (35), a torque sensor (37) is installed at the output end of the second reducer (36), and the torque sensor (37) is electrically connected to the central processing unit module (13), a coupling (38) is installed at one end of the torque sensor (37), a ball screw pair (39) is installed at one end of the coupling (38), and the front end of the outer wall of the ball screw pair (39) is installed on the inner wall of the ball nut (7).

6. A ball screw pair torsional rigidity testing device according to claim 5, characterized in that: A torsion angle measuring instrument (40) is installed at the front middle part and the rear end of the outer wall of the ball screw pair (39). The torsion angle measuring instrument (40) is used to measure the torsion angle generated when the ball screw pair (39) is subjected to a torsion torque.

7. A ball screw pair torsional rigidity testing device according to claim 1, characterized in that: A support plate (41) is installed at the other end of the top of the fixing seat (2), and a group of fixing blocks (42) are installed at one end of the supporting plate (41). A second threaded rod (43) is installed through a thread on one side of the fixing block (42), and an arc-shaped clamping plate (44) is movably connected to one end of the second threaded rod (43), and a clamping surface of the arc-shaped clamping plate (44) is movably connected to one end of the outer wall of the ball screw pair (39). A connecting groove (48) is opened on one side of the arc-shaped clamping plate (44), and a connecting block (49) is movably connected to the inner wall of the connecting groove (48), and one end of the connecting block (49) is fixedly connected to one end of the second threaded rod (43).

8. A method for testing a ball screw pair torsional rigidity testing device according to any one of claims 1 to 7, characterized in that: The test steps of the ball screw pair torsional rigidity test device are as follows: S1. Through the setting of the monitoring component, the camera (11) can obtain the image and video data of the fixing hole (8), and transmit the image and video data to the image recognition processing module (12) through the wireless transmission module (10), thereby measuring the location and diameter data of the fixing hole (8), and adjusting the auxiliary fixing component to automatically perform auxiliary restriction on the ball nut (7) through the central processing unit module (13) and the PLC controller (14); S2, according to the acquired positioning data of the fixing hole (8), regulating the second hydraulic telescopic cylinder (16) to adjust the positions of the fixing box (17) and the limiting disk (20), and according to the diameter data, regulating the first servo motor (18) and the first reducer (19) to adjust the rotation of the limiting disk (20), and inserting the electric telescopic fixing column (21) with a diameter that meets the standard into the fixing hole (8); S3, the third hydraulic telescopic cylinder (47) drives the hydraulic telescopic rod (46) to be inserted into the limiting hole (45), thereby completing the limitation of the ball nut (7); S4. During the test, the temperature in the test box (1) can be adjusted by setting the heater (27), the compressor-type refrigerator (28) and the temperature sensor (29), and accurate temperature change data can be obtained through the temperature sensor (29), so that the torsional rigidity of the ball screw pair (39) can be tested under different temperature conditions; S5, the second servo motor (33) drives the first threaded rod (32) to rotate and thereby adjust the slider (31) and the fixed plate (34) to move. The ball screw pair (39) and the torque sensor (37) are connected to each other by using a coupling (38). The position of the fixed plate (34) is adjusted in conjunction with the setting of the support plate (41), so that the two ends of the ball screw pair (39) can be constrained. The torsional rigidity of the ball screw pair is tested by using the setting of the third servo motor (35), the second reducer (36), the torque sensor (37) and the torsion angle measuring instrument (40) in conjunction with the nut fixer (3).

9. The method for testing a ball screw pair torsional rigidity testing device according to claim 8, characterized in that: The S3 also includes the following steps: S31. By providing a plurality of electrically-operated telescopic fixing columns (21) having different diameters and a second hydraulic telescopic cylinder (16), ball nuts (7) of different sizes can be restricted.

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