Ball screw torsion testing device and method

Abstract

The invention relates to the technical field of testing devices, and provides a ball screw torsion testing device and method, which can be matched with a screw to form full-coverage detection, the simulation of a detection environment is rich, the installation operation is convenient, the practicability is good, and the ball screw torsion testing device comprises a fixed clamping mechanism, a simulation mechanism, a detection mechanism and a mobile station, a left installation frame and a right installation frame are fixedly connected to the movable table, two polished rods are fixedly connected between the left installation frame and the right installation frame, the fixed clamping mechanism comprises a main shaft, the main shaft is rotationally connected to the right installation frame, a three-jaw chuck is installed at the left end of the main shaft, and a driving force application assembly is installed in the right installation frame. The simulation mechanism comprises a sliding frame and a load frame, the sliding frame is in sliding connection with the two polished rods, the sliding frame is in sliding connection with two opposite moving frames, the two opposite moving frames synchronously and relatively move, semicircular openings are formed in the two opposite moving frames, and half-thread sleeves are fixedly connected in the two semicircular openings.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, and particularly relates to a ball screw torque testing device and method. Background Art

[0002] As is well known, torque is the moment generated when an object is subjected to a tangential force in the direction of rotation of the object. The torque of a ball screw is an important parameter to measure its power transmission ability. To facilitate the detection of the torque of the ball screw, we propose a ball screw torque testing device and method.

[0003] After retrieval, the patent with the Chinese patent publication number CN212621452U discloses a ball screw torque testing device, which is generally described as including a support plate. On both sides of the top of the support plate, fixing plates are fixedly connected. At the top left of the fixing plate, a servo motor is fixedly connected through a plate. At the center of the opposite sides of the fixing plates, rotating rods are fixedly connected through bearings. At the opposite ends of the two rotating rods, fixing seats are fixedly connected. The output end of the servo motor is fixedly connected to the other end of the rotating rod. When in use, the ball screw body is inserted into the inner cavity of the fixing seat, the electric push rod is turned on, and the electric push rod drives the second clamping plate to move downward to fix the ball screw body. The handle is rotated, the handle drives the adjusting bolt to rotate, the adjusting bolt drives the threaded block to move up and down, the threaded block drives the sliding rod and the moving block to move up and down, so as to insert the fixing rod into the inner cavity of the clamping block. The servo motor is turned on, the servo motor drives the rotating rod to rotate, the rotating rod drives the fixing seat to rotate, the fixing seat drives the ball screw body to rotate, the ball screw body drives the ball screw pair to move left and right, the ball screw pair drives the clamping block to move left and right, the clamping block drives the fixing rod to move left and right, the fixing rod drives the spring to move left and right, and the spring squeezes the pressure sensing device, so as to conduct the torque to the pressure sensing device through the spring to test the torque, and the tested torque is displayed through a display. At the same time, the patent with the Chinese patent publication number CN110320029B discloses a ball screw torque testing device, which is generally described as including a base and a driving mechanism, a fixed clamping mechanism, a measuring mechanism, and a translation mechanism arranged on the base. When in use, a load is applied to the measured screw, so that one end of it is fixed to the measured screw chuck, and the other end abuts against the tip of the measured screw tail. The servo motor is turned on to drive the measured screw to rotate, and at the same time, the stepping motor is controlled to drive the transmission screw to rotate. Thus, the translation cross plate drives the measured screw support seat and the force measuring device support plate to move synchronously with the measured force device, so as to ensure that when the measured screw nut chuck makes a back-and-forth movement, the force measuring device in contact with it can be relatively stationary, and the force measuring device realizes data acquisition when the mechanism runs.

[0004] Although the above prior art solutions can be used in conjunction with ball screws to achieve torque testing, the former realizes torque conduction to the pressure sensing device through a spring. Considering the overall solution, it can be found that the screw detection it can achieve is more focused on the overall detection of a single screw and it is difficult to form corresponding detections according to different positions of the screw. The detection form needs to be further optimized. On the one hand, the force measuring device in the latter is described rather generally. On the other hand, the specific detection form of the screw is not clear, and the detection content and detection form need to be further clarified. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a ball screw torque testing device and method, which can form a full-coverage detection in conjunction with the screw, has a relatively rich simulation of the detection environment, is convenient for installation and operation, and has good practicability.

[0006] To achieve the above object, the present invention provides the following technical solution: A ball screw torque testing device includes a fixed clamping mechanism, and also includes a simulation mechanism, a detection mechanism and a moving table. The moving table is fixedly connected with a left mounting frame and a right mounting frame. Two optical bars are fixedly connected between the left mounting frame and the right mounting frame. The fixed clamping mechanism includes a main shaft, and the main shaft is rotatably connected to the right mounting frame. A three-jaw chuck is installed at the left end of the main shaft. A driving force application component is installed in the right mounting frame, and the driving force application component is used for driving the rotation of the main shaft. The simulation mechanism includes a sliding frame and a load frame. The sliding frame is slidably connected to the two optical bars. Two opposing moving frames are slidably connected to the sliding frame. The two opposing moving frames move relatively synchronously. Semi-circular openings are provided on both of the two opposing moving frames, and semi-threaded sleeves are fixedly connected in both of the semi-circular openings. The two semi-threaded sleeves cooperate with each other. A quick limiting component is connected between the two opposing moving frames. The load frame is fixedly connected to the top of the moving table. A transmission connecting frame is slidably connected to the load frame. An electromagnet is installed in the transmission connecting frame. Two friction frames are slidably connected to the transmission connecting frame, and permanent magnets matching the electromagnet are installed in both of the two friction frames. The detection mechanism includes an electric sliding table, and the electric sliding table is installed on the moving table. A vision camera is installed on the electric sliding table.

[0007] Preferably, an electric telescopic rod is installed on the electric sliding table, an electric lifting rod is installed on the telescopic rod of the electric telescopic rod, and the vision camera is installed at the bottom end of the lifting rod of the electric lifting rod.

[0008] Preferably, the driving force - applying assembly includes a servo - motor, an electric driving rod, and a rotating disk. The servo - motor is installed at the front end of the right mounting frame. A driving cone pulley is installed on the output shaft of the servo - motor. The driving cone pulley meshes with a driven cone pulley. The driven cone pulley is fixedly connected with a sliding sleeve. The sliding sleeve is slidably connected to the main shaft, and a meshing access spring is connected between the main shaft and the sliding sleeve. The electric driving rod is hinged inside the right mounting frame. The rotating disk is rotatably connected to the right mounting frame. The driving rod of the electric driving rod is connected to the rotating disk. An axial connecting sleeve is arranged on the rotating disk. An insertion section is arranged on the axial connecting sleeve. An insertion groove is opened at one end of the sliding sleeve close to the insertion section. An elastic two - way limiting structure matched with the axial connecting sleeve is installed on the right mounting frame.

[0009] Preferably, the elastic two - way limiting structure includes a suspension bracket. The suspension bracket is fixedly connected to the right mounting frame. A rotating block is rotatably connected to the suspension bracket. The rotating block is connected with a driven block through a telescopic spring. The driven block is rotatably connected with a transmission ring. The transmission ring is rotatably connected to the axial connecting sleeve.

[0010] Preferably, a transmission shaft is fixedly connected to the rotating disk. A rotating opening is opened on the driving rod of the electric driving rod. The transmission shaft is rotatably connected in the rotating opening. Scale lines are arranged on the rotating disk. An indicating needle is installed on the right mounting frame.

[0011] Preferably, the quick - limiting assembly includes a limiting ring and two limiting rods. The two limiting rods are respectively fixedly connected to the two displacement frames. The limiting ring is used for sleeving and limiting the two limiting rods. The limiting ring is fixedly connected with an outer - extending plate. A connecting spring is fixedly connected to the bottom end of the outer - extending plate. The connecting spring is fixedly connected to one of the two displacement frames.

[0012] Preferably, both of the two displacement frames are fixedly connected with transmission racks. A synchronous gear is rotatably connected to the bottom end of the sliding frame. Both of the two transmission racks mesh with the synchronous gear.

[0013] Preferably, both of the two friction frames are fixedly connected with pushing springs. Both of the pushing springs are fixedly connected to the transmission connecting frame. Friction heads are arranged at the mutually - approaching ends of the two friction frames. A middle strip groove and two side friction grooves are opened on the load - carrying frame. The middle strip groove is matched with the electromagnet. The two friction heads respectively extend into the two side friction grooves.

[0014] Preferably, a tailstock is slidably connected to the optical bar, an adjusting rod is slidably connected to the tailstock, a tailstock chuck is rotatably connected to the right end of the adjusting rod, a driving cylinder is slidably connected to the adjusting rod, the driving cylinder is rotatably connected to the left mounting bracket, a driven gear ring is fixedly connected to the driving cylinder, a control motor is installed on the left mounting bracket, a driving gear ring is fixedly connected to the output shaft of the control motor, the driving gear ring meshes with the driven gear ring, an internal screw cylinder is fixedly connected to the left mounting bracket, and a round-edge thread matching the internal screw cylinder is provided on the adjusting rod.

[0015] A ball screw torque testing method includes the following steps:

[0016] S1. Before the detection operation, first complete the installation of the ball screw torque testing device, then form the electrical installation of the corresponding circuit by supporting the driving force application component, the electric slide table, the electromagnet and the vision camera. At the same time, install controllers for the driving force application component, the electric slide table, the electromagnet and the vision camera and conduct operation debugging. Through the controller, realize the operation control of the driving force application component, the electromagnet and the vision camera. During the debugging process, establish the corresponding relationship between the current intensity in the electromagnet and the magnetic force of the permanent magnet, and the corresponding relationship between the magnetic force and the relative friction between the load rack and the friction rack. Finally, form the corresponding relationship between the current in the electromagnet and the relative friction force between the load rack and the friction rack, so as to facilitate controlling the relative friction force between the load rack and the friction rack by controlling the current magnitude in the electromagnet during the screw detection process.

[0017] S2. During the detection operation, first adjust the quick limit component to make the relative limit function of the quick limit component on the two moving frames ineffective, and control the two moving frames to separate relatively. When the gap generated by the relative separation of the two moving frames allows the screw to be detected to be inserted, stop the relative separation operation of the two moving frames, place the screw to be detected in the area between the two moving frames and form a camming movement into the three-jaw chuck, so that the screw to be detected can be inserted into the three-jaw chuck by an appropriate length, and then form an auxiliary clamping of the screw through the three-jaw chuck. Then control the two moving frames to approach each other again until they contact, and form the re-relative limit of the two moving frames through the quick limit component to complete the preparation work before the screw detection.

[0018] S3. The half-threaded sleeves within the two opposing moving brackets cooperate with each other to form an integral threaded sleeve. This integral threaded sleeve forms a screwing action relative to the lead screw. Then, by applying current to the electromagnet, the relative frictional force between the load bracket and the friction bracket is controlled to simulate the load under the actual operating conditions of the lead screw. Under the load simulation state, the driving force application component is operated to drive the movement of the lead screw to be detected. Along with the movement of the lead screw, the vision camera conducts corresponding detection with the lead screw as the target to form an auxiliary detection of the lead screw under load operation, realizing the recording of the shape change state of the lead screw after torque application and the acquisition and quantification of data. Moreover, during the detection process by the vision camera, the electric slide table will control the vision camera to move relative to the lead screw to be detected, achieving full-coverage detection after the lead screw is loaded with a load.

[0019] Compared with the prior art, the present invention provides a ball screw torque testing device and method, having the following beneficial effects:

[0020] (1) In the present invention, through the design of the fixed clamping mechanism, a clamping and mounting structure corresponding to the lead screw in the ball screw is formed, so as to realize the auxiliary clamping of the lead screw and facilitate the application of torque during the detection process of the lead screw.

[0021] (2) In the present invention, through the design of the simulation mechanism, a simulation loading function for forming a load is provided in cooperation with the lead screw to be detected, thereby facilitating the torque testing of the lead screw. The load loading form is more diverse and more practical.

[0022] (3) In the present invention, through the provision of the detection mechanism, the lead screw to be detected can be detected under a load state, so as to achieve the data acquisition and quantification of the deformation condition of the lead screw under the action of torque.

[0023] (4) In the present invention, through the design of the driving force application component, a power source for forming multi-form load driving is provided in cooperation with the main shaft, facilitating the formation of multiple modes such as small-load continuous rotation driving and large-load small-amplitude driving in cooperation with the main shaft, and thus facilitating the creation of a rich detection environment for the lead screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a three-dimensional structural schematic diagram of the whole of the present invention;

[0025] Figure 2 is of the present invention Figure 1 is a partial enlarged structural schematic diagram of part A in the present invention;

[0026] Figure 3 is of the present invention Figure 1 is a partial enlarged structural schematic diagram of part B in the present invention;

[0027] Figure 4 is a three-dimensional structural schematic diagram of the relative distribution of the left mounting bracket and the right mounting bracket of the present invention;

[0028] Figure 5 Schematic diagram of the three-dimensional structure of the sliding frame, opposing moving frame, transmission connecting frame, etc. that cooperate with each other in the present invention;

[0029] Figure 6 Exploded three-dimensional structure diagram of the sliding frame, opposing moving frame, semi-threaded sleeve, etc. that cooperate with each other in the present invention;

[0030] Figure 7 Schematic diagram of the three-dimensional structure of the whole of the present invention viewed from the rear;

[0031] Figure 8 For the present invention Figure 7 Partial enlarged structure diagram at position D in the present invention;

[0032] Figure 9 For the present invention Figure 7 Partial enlarged structure diagram at position C in the present invention;

[0033] Figure 10 Exploded three-dimensional structure diagram of the main shaft, shaft connecting sleeve, transmission ring, etc. that cooperate with each other in the present invention;

[0034] Figure 11 Schematic diagram of the three-dimensional structure of the whole of the present invention viewed from below;

[0035] Figure 12 Schematic diagram of the three-dimensional structure of the sliding frame, opposing moving frame, friction frame, etc. that cooperate with each other in the present invention viewed from below;

[0036] Figure 13 Exploded three-dimensional structure diagram of the sliding frame, opposing moving frame, synchronous gear, etc. that cooperate with each other in the present invention;

[0037] Figure 14 Exploded three-dimensional structure diagram of the rotating disk, shaft connecting sleeve, transmission ring, etc. that cooperate with each other in the present invention.

[0038] In the figure: 1. Mobile station; 2. Left mounting bracket; 3. Right mounting bracket; 4. Optical bar; 5. Spindle; 6. Three-jaw chuck; 7. Sliding carriage; 8. Load carriage; 9. Opposing carriage; 10. Semi-circular opening; 11. Half-threaded sleeve; 12. Transmission connecting bracket; 13. Electromagnet; 14. Friction bracket; 15. Permanent magnet; 16. Electric slide table; 17. Vision camera; 18. Electric telescopic rod; 19. Electric lifting rod; 20. Servo motor; 21. Electric drive rod; 22. Rotating disk; 23. Driving cone pulley; 24. Driven cone pulley; 25. Sliding sleeve; 26. Engaging access spring; 27. Shaft connecting sleeve; 28. Insertion section; 29. Insertion groove; 30. Suspension bracket; 31. Rotating block; 32. Expansion spring; 33. Driven block; 34. Transmission ring; 35. Transmission shaft; 36. Rotating opening; 37. Scale line; 38. Indicator needle; 39. Limiting ring; 40. Limiting rod; 41. Extended plate; 42. Connecting spring; 43. Transmission rack; 44. Synchronous gear; 45. Pushing spring; 46. Friction head; 47. Middle strip groove; 48. Side friction groove; 49. Tailstock; 50. Adjusting rod; 51. Tailstock chuck; 52. Driving cylinder; 53. Driven gear ring; 54. Control motor; 55. Driving gear ring; 56. Inner threaded cylinder; 57. Round-edge thread. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Embodiment, please refer to Figures 1 - 14, a ball screw torque testing device, including a fixed clamping mechanism, further including a simulation mechanism, a detection mechanism and a moving table 1. A left mounting bracket 2 and a right mounting bracket 3 are fixedly connected to the moving table 1. Two optical bars 4 are fixedly connected between the left mounting bracket 2 and the right mounting bracket 3. The fixed clamping mechanism includes a main shaft 5. The main shaft 5 is rotatably connected to the right mounting bracket 3. A three-jaw chuck 6 is installed at the left end of the main shaft 5. Through the design of the fixed clamping mechanism, a clamping and mounting structure corresponding to the screw in the ball screw is formed to realize the auxiliary clamping of the screw and facilitate the torque application during the screw detection process. A driving force application component is installed in the right mounting bracket 3. The driving force application component is used for driving the rotation of the main shaft 5. The simulation mechanism includes a sliding bracket 7 and a load bracket 8. The sliding bracket 7 is slidably connected to the two optical bars 4. Two moving brackets 9 are slidably connected to the sliding bracket 7. Both of the two moving brackets 9 are fixedly connected with transmission racks 43. A synchronous gear 44 is rotatably connected to the bottom end of the sliding bracket 7. Both of the two transmission racks 43 are meshed with the synchronous gear 44. The two moving brackets 9 move relatively synchronously. Semicircular openings 10 are formed in both of the two moving brackets 9. Semi-threaded sleeves 11 are fixedly connected in both of the two semicircular openings 10. The two semi-threaded sleeves 11 cooperate with each other. A quick limit component is connected between the two moving brackets 9. The quick limit component includes a limit ring 39 and two limit rods 40. The two limit rods 40 are respectively fixedly connected to the two moving brackets 9. The limit ring 39 is used for the relative sleeving and limiting of the two limit rods 40. The limit ring 39 is fixedly connected with an extension plate 41. A connecting spring 42 is fixedly connected to the bottom end of the extension plate 41. The connecting spring 42 is fixedly connected to one of the two moving brackets 9. It is convenient to limit the relative positions of the two moving brackets 9 after they come into contact with each other. The load bracket 8 is fixedly connected to the top end of the moving table 1. A transmission connecting bracket 12 is slidably connected to the load bracket 8. An electromagnet 13 is installed in the transmission connecting bracket 12. Two friction brackets 14 are slidably connected to the transmission connecting bracket 12. Permanent magnets 15 matching the electromagnet 13 are installed in both of the two friction brackets 14. Through the design of the simulation mechanism, a simulation loading function of the load is formed to match the screw to be detected, thereby facilitating the torque test of the screw. The load loading form is more diverse and more practical.

[0041] It should be further noted that both friction frames 14 are fixedly connected with push springs 45, both push springs 45 are fixedly connected with the transmission connecting frame 12, friction heads 46 are arranged at the mutually approaching ends of the two friction frames 14, a middle strip groove 47 and two side friction grooves 48 are formed in the load frame 8, the middle strip groove 47 is matched with the electromagnet 13, and the two friction heads 46 respectively extend into the two side friction grooves 48, which is convenient for the relative pushing away of the friction frame 14 relative to the load frame 8 after the electromagnet 13 is powered off. The detection mechanism includes an electric slide table 16, the electric slide table 16 is installed on the moving table 1, a vision camera 17 is installed on the electric slide table 16, an electric telescopic rod 18 is installed on the electric slide table 16, an electric lifting rod 19 is installed on the telescopic rod of the electric telescopic rod 18, and the vision camera 17 is installed at the bottom end of the lifting rod of the electric lifting rod 19. Through the provision of the detection mechanism, the detection of the lead screw under test in a loaded state can be achieved, so as to collect and quantify the data of the deformation of the lead screw after being subjected to a torsional force. The driving force application component includes a servo motor 20, an electric driving rod 21 and a rotating disc 22. The servo motor 20 is installed at the front end of the right mounting frame 3, a driving bevel gear 23 is installed on the output shaft of the servo motor 20, the driving bevel gear 23 meshes with a driven bevel gear 24, the driven bevel gear 24 is fixedly connected with a sliding sleeve 25, the sliding sleeve 25 is slidably connected with the main shaft 5, and an engagement access spring 26 is connected between the main shaft 5 and the sliding sleeve 25. The electric driving rod 21 is hinged in the right mounting frame 3, the rotating disc 22 is rotatably connected with the right mounting frame 3, the driving rod of the electric driving rod 21 is connected with the rotating disc 22, a shaft connecting sleeve 27 is arranged on the rotating disc 22, an insertion section 28 is arranged on the shaft connecting sleeve 27, and an insertion groove 29 is formed at one end of the sliding sleeve 25 close to the insertion section 28.

[0042] It should be further noted that an elastic bi-directional limiting structure matching the shaft connecting sleeve 27 is installed on the right mounting bracket 3. The elastic bi-directional limiting structure includes a suspension bracket 30 fixedly connected to the right mounting bracket 3. A rotating block 31 is rotatably connected to the suspension bracket 30. The rotating block 31 is connected to a driven block 33 through a telescopic spring 32. The driven block 33 is rotatably connected to a transmission ring 34, and the transmission ring 34 is rotatably connected to the shaft connecting sleeve 27. Through the design of the driving force application component, a power source for multi-form load driving is formed in cooperation with the main shaft 5, which is convenient for forming various modes of small-load continuous rotation driving and large-load small-amplitude driving in cooperation with the main shaft 5, and further convenient for enriching the creation of the detection environment of the lead screw. A transmission shaft 35 is fixedly connected to the rotating disk 22. A rotating port 36 is formed in the driving rod of the electric driving rod 21, showing the specific transmission structure between the rotating disk 22 and the electric driving rod 21. The transmission shaft 35 is rotatably connected in the rotating port 36. A scale line 37 is provided on the rotating disk 22, and an indicating needle 38 is installed on the right mounting bracket 3, which is convenient for showing and reading the rotation angle of the rotating disk 22, and an angle sensor can also be selected according to specific situations. A tailstock 49 is slidably connected to the optical bar 4. An adjusting rod 50 is slidably connected to the tailstock 49. The right end of the adjusting rod 50 is rotatably connected to a tailstock chuck 51. A driving cylinder 52 is slidably connected to the adjusting rod 50. The driving cylinder 52 is rotatably connected to the left mounting bracket 2. A driven gear ring 53 is fixedly connected to the driving cylinder 52. A control motor 54 is installed on the left mounting bracket 2. A driving gear ring 55 is fixedly connected to the output shaft of the control motor 54. The driving gear ring 55 meshes with the driven gear ring 53. An internal screw cylinder 56 is fixedly connected to the left mounting bracket 2. A round-edge thread 57 matching the internal screw cylinder 56 is provided on the adjusting rod 50, which forms an auxiliary support and clamping for the lead screw clamped by the three-jaw chuck 6, and the position of the auxiliary clamping can be adjusted correspondingly according to the specific size of the lead screw, with stronger practicability. A storage space is provided in the moving platform 1, and a wheel set is installed at the bottom of the moving platform 1, which is convenient for the movement of the moving platform 1. A wiring track is installed at the top of the moving platform 1, which is convenient for the guiding and protection of the power connection line under actual installation and use conditions.

[0043] The visual camera 17, electromagnet 13, electric slide table 16, electric telescopic rod 18, electric lifting rod 19, servo motor 20, electric driving rod 21 and control motor 54 in this embodiment are all conventional devices well-known to those skilled in the art and purchased on the market. In the present invention, we only use them without improving their structures and functions. Their setting methods, installation methods and electrical connection methods can be debugged and operated by those skilled in the art as long as they follow the requirements of their user manuals, and will not be elaborated here.

[0044] In summary, the working principle of the ball screw torque testing device is as follows. Before the detection operation, first install the ball screw torque testing device. Then, a corresponding electrical installation is formed by supporting the visual camera 17, the electromagnet 13, the electric slide table 16, the electric telescopic rod 18, the electric lifting rod 19, the servo motor 20, the electric drive rod 21, and the control motor 54 to form a corresponding circuit. At the same time, a controller is installed and run debugged for the visual camera 17, the electromagnet 13, the electric slide table 16, the electric telescopic rod 18, the electric lifting rod 19, the servo motor 20, the electric drive rod 21, and the control motor 54. During the debugging process, the corresponding relationship between the current intensity in the electromagnet 13 and the magnetic force of the permanent magnet 15 should be established, as well as the corresponding relationship between the magnetic force and the relative friction between the load rack 8 and the friction rack 14. Finally, the corresponding relationship between the current in the electromagnet 13 and the relative frictional force between the load rack 8 and the friction rack 14 is formed to facilitate controlling the relative frictional force between the load rack 8 and the friction rack 14 by controlling the current magnitude in the electromagnet 13 during the screw detection process. During the detection operation, first adjust the quick limit component, remove the limit ring 39 relative to the two limit rods 40, so that the relative limiting effect of the limit ring 39 on the two limit rods 40 fails. During this process, the limit ring 39 overcomes the tension of the connecting spring 42 to form a position movement, making the relative limiting effect of the quick limit component on the two opposing frames 9 fail, and controlling the relative separation of the two opposing frames 9. Since both transmission racks 43 are in meshing transmission relative to the synchronous gear 44, when the two opposing frames 9 are relatively separated, only one of the two opposing frames 9 needs to be adjusted to achieve the linkage movement of the other opposing frame 9. When the gap generated by the relative separation of the two opposing frames 9 allows the screw to be detected to be inserted, stop the relative separation operation of the two opposing frames 9, place the screw to be detected in the area between the two opposing frames 9 and form a movement into the three-jaw chuck 6, so that the screw to be detected can be inserted into the appropriate length of the three-jaw chuck 6, and then form an auxiliary clamping of the screw through the three-jaw chuck 6. Then, control the two opposing frames 9 to approach each other again until they contact, and reinstall the limit ring 39 relative to the two limit rods 40, that is, form the re-relative limit of the two opposing frames 9 through the quick limit component. When the length of the screw to be detected is relatively long, the rotation drive of the drive gear ring 55 is realized by controlling the operation of the control motor 54, and under the transmission effect between the drive gear ring 55 and the driven gear ring 53, the rotation drive of the drive cylinder 52 can be realized, and the adjusting rod 50 in the drive cylinder 52 will also rotate synchronously. Under the thread transmission effect between the adjusting rod 50 and the internal screw cylinder 56, the relative distance adjustment of the adjusting rod 50 relative to the screw to be detected can be realized, thereby facilitating the position adjustment of the tail chuck 51 relative to the screw to facilitate the auxiliary clamping support of the tail chuck 51 relative to the screw, and completing the preparatory work before the screw detection.

[0045] Further, since the half-threaded sleeves 11 in the two opposite support frames 9 cooperate with each other to form an integral threaded sleeve, the integral threaded sleeve forms a screwing action relative to the lead screw. Then, by applying current to the electromagnet 13, the relative frictional force between the load frame 8 and the friction frame 14 is controlled to simulate the load in the actual operation state of the lead screw. Under the load simulation state, the driving force application component is operated to drive the movement of the detected lead screw. Along with the movement of the lead screw, the vision camera 17 forms corresponding detection with the lead screw as the target to form an auxiliary detection of the lead screw under load operation, and record the shape change state and collect and quantify the data after the lead screw is applied with torsion. During the detection process of the vision camera 17, the electric slide table 16 will control the vision camera 17 to form relative movement along the detected lead screw to achieve full-coverage detection after the lead screw is applied with load. When detecting the lead screw under the state of continuous rotation drive with a small load, adjust the structure formed by the rotating block 31, the telescopic spring 32 and the driven block 33 to the state shown in Appendix Figure 1 and Appendix Figure 2 In this state, it is a limit state of the telescopic spring 32. At this time, the shaft connecting sleeve 27 is relatively pushed away from the insertion groove 29. Under the pushing action of the meshing access spring 26, the driven bevel gear 24 is pushed towards the side close to the driving bevel gear 23, so as to achieve the relative transmission meshing between the driving bevel gear 23 and the driven bevel gear 24. When the servo motor 20 is powered on and operates, the rotation of the main shaft 5 can be driven through the transmission between the driving bevel gear 23 and the driven bevel gear 24. The main shaft 5 can drive the rotation of the clamped lead screw through the three-jaw chuck 6. The rotation of the lead screw adds load through the two half-threaded sleeves 11. When simulating the state of a large load on the lead screw, move the driven block 33 towards the direction close to the three-jaw chuck 6 until the telescopic spring 32 is compressed to the shortest length and enters another elastic limit state. After that, the rotating block 31, the telescopic spring 32 and the driven block 33 cooperate to push the insertion section 28 into the insertion groove 29 and form the stability of the relative position of the insertion section 28 relative to the insertion groove 29. In this state, due to the pushing action of the telescopic spring 32, a relative pushing action will be formed on the sliding sleeve 25 through the insertion section 28. Due to this pushing action, the meshing access spring 26 will be compressed and the overall length will become shorter. At the same time, since the sliding sleeve 25 is pushed by the telescopic spring 32 and drives the driven bevel gear 24 to separate from the driving bevel gear 23, the relative meshing action between the driving bevel gear 23 and the driven bevel gear 24 fails thereafter. Then, the rotation of the rotating disk 22 is driven by the operation of the electric drive rod 21. The rotation of the rotating disk 22 drives the rotation of the main shaft 5 through the transmission of the sliding sleeve 25, the shaft connecting sleeve 27 and the insertion section 28. Since the setting of the rotating disk 22 increases the power arm of the rotation drive of the main shaft 5, the driving force formed for the rotation of the main shaft 5 is greater. During the operation of the electric telescopic rod 18, the rotation situation of the scale line 37 relative to the indicating needle 38 should be observed to accurately judge the rotation angle of the lead screw under the torque force.

[0046] Furthermore, during the lead screw detection process, since the applied load can be controlled by controlling the current passing through the electromagnet 13, various situations such as simulating a fixed load or a variable load of the lead screw can be formed by controlling the current. Considering the frictional loss between the friction head 46 and the middle strip groove 47, the friction head 46 and the middle strip groove 47 should be made of wear-resistant materials. According to the usage conditions, the corresponding relationship between the current in the electromagnet 13 and the relative frictional force between the load rack 8 and the friction rack 14 should be calibrated periodically to form error compensation. For a ball screw with a ball sleeve, the half-threaded sleeve 11 can be selectively removed, and the detection preparation before detection can be realized by directly installing the threaded sleeve on the lead screw with the displacement frame 9. During the operation of the vision camera 17, the appearance of the lead screw in the state without load should be collected in advance, and then the appearance should be collected under the condition of loading the lead screw to form a comparison before and after the data. During the detection of the lead screw, considering safety and detection effect, the rotation speed of the lead screw should not be too fast. In a necessary state, the vision camera 17 can be used to form an instant stop after the load is applied to ensure the information collection quality of the vision camera 17, and at the same time, the simulation of the lead screw under instantaneous load can also be carried out. To facilitate the detection operation at multiple positions of the lead screw, the servo motor 20 and the electric drive rod 21 can be used to form an alternating drive connection. When the servo motor 20 drives and connects, the rotation drive of the lead screw is realized to facilitate the rapid adjustment of the relative position of the half-threaded sleeve 11 on the lead screw. After the position adjustment is completed, the electric drive rod 21 works to apply force for the detection of the lead screw. The torque force borne by the lead screw in a certain state during the detection process corresponds to the relative frictional force between the load rack 8 and the friction rack 14 corresponding to the instantaneous current connected to the electromagnet 13 at the moment when the friction rack 14 enters the moving state from the static state relative to the transmission connection rack 12.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball screw torque test device, comprising a fixed clamping mechanism, characterized in that: The invention also comprises a simulation mechanism, a detection mechanism and a moving platform (1), wherein the moving platform (1) is fixedly connected with a left mounting frame (2) and a right mounting frame (3), two optical rods (4) are fixedly connected between the left mounting frame (2) and the right mounting frame (3), the fixed clamping mechanism comprises a main shaft (5), the main shaft (5) is rotatably connected to the right mounting frame (3), a three-jaw chuck (6) is installed at the left end of the main shaft (5), a driving force component is installed in the right mounting frame (3), and the driving force component is used for driving the rotation of the main shaft (5), the simulation mechanism comprises a sliding frame (7) and a load frame (8), the sliding frame (7) is slidably connected with the two optical rods (4), the sliding frame (7) is slidably connected with two opposing shifting frames (9), the two opposing shifting frames (9) move synchronously relative to each other, and the two opposing shifting frames (9) are provided with a semicircular opening (10), and a semi-threaded sleeve (11) is fixedly connected in the two semicircular openings (10), and the two semi-threaded sleeves (11) cooperate with each other. A quick limit assembly is connected between the two opposing shifting frames (9), and the load frame (8) is fixedly connected to the top of the moving platform (1), and a transmission frame (12) is slidably connected to the load frame (8), and an electromagnet (13) is installed in the transmission frame (12), and two friction frames (14) are slidably connected to the transmission frame (12), and permanent magnets (15) matching the electromagnet (13) are installed in the two friction frames (14), and the detection mechanism includes an electric slide (16), and the electric slide (16) is installed on the moving platform (1), and a visual camera (17) is installed on the electric slide (16).

2. A ball screw torque testing device according to claim 1, characterized in that: An electric telescopic rod (18) is installed on the electric slide (16), an electric lifting rod (19) is installed on the telescopic rod of the electric telescopic rod (18), and a visual camera (17) is installed at the bottom end of the lifting rod of the electric lifting rod (19).

3. A ball screw torque testing device according to claim 2, characterized in that: The driving force applying assembly comprises a servo motor (20), an electric driving rod (21) and a rotating disk (22); the servo motor (20) is mounted at the front end of the right mounting frame (3); a driving cone wheel (23) is mounted on the output shaft of the servo motor (20); the driving cone wheel (23) is meshed with a driven cone wheel (24); the driven cone wheel (24) is fixedly connected with a sliding sleeve (25); the sliding sleeve (25) is slidably connected to the main shaft (5); and an engagement access spring is connected between the main shaft (5) and the sliding sleeve (25). (26), the electric drive rod (21) is hinged in the right mounting frame (3), the rotating disk (22) is rotatably connected to the right mounting frame (3), the drive rod of the electric drive rod (21) is connected to the rotating disk (22), the rotating disk (22) is provided with a shaft sleeve (27), the shaft sleeve (27) is provided with an insertion section (28), an insertion groove (29) is provided at one end of the sliding sleeve (25) close to the insertion section (28), and an elastic bidirectional limiting structure matching the shaft sleeve (27) is installed on the right mounting frame (3).

4. A ball screw torque testing device according to claim 3, characterized in that: The elastic bidirectional limiting structure comprises a suspension bracket (30), the suspension bracket (30) is fixedly connected to the right mounting bracket (3), a rotating block (31) is rotatably connected to the suspension bracket (30), the rotating block (31) is connected to a driven block (33) via a telescopic spring (32), the driven block (33) is rotatably connected to a transmission ring (34), and the transmission ring (34) is rotatably connected to the shaft sleeve (27).

5. A ball screw torque testing device according to claim 4, characterized in that: A transmission shaft (35) is fixedly connected to the rotating disk (22), a rotation opening (36) is provided on the driving rod of the electric driving rod (21), the transmission shaft (35) is rotationally connected in the rotation opening (36), a scale line (37) is provided on the rotating disk (22), and an indicator needle (38) is installed on the right mounting frame (3).

6. A ball screw torque testing device according to claim 5, characterized in that: The quick limiting assembly comprises a limiting ring (39) and two limiting rods (40), wherein the two limiting rods (40) are respectively fixedly connected to the two opposing shifting frames (9), and the limiting ring (39) is used for relative sleeve limiting of the two limiting rods (40). The limiting ring (39) is fixedly connected to an extending plate (41), and the bottom end of the extending plate (41) is fixedly connected to a connecting spring (42), and the connecting spring (42) is fixedly connected to one of the two opposing shifting frames (9).

7. A ball screw torque testing device according to claim 6, characterized in that: The two shifting frames (9) are both fixedly connected with a transmission rack (43), the bottom end of the sliding frame (7) is rotatably connected with a synchronous gear (44), and the two transmission racks (43) are both meshed with the synchronous gear (44).

8. A ball screw torque testing device according to claim 7, characterized in that: The two friction frames (14) are both fixedly connected with a push-out spring (45), and the two push-out springs (45) are both fixedly connected with the transmission frame (12). The two friction frames (14) are both provided with a friction head (46) at one end close to each other. The load frame (8) is provided with a middle groove (47) and two side friction grooves (48), and the middle groove (47) matches the electromagnet (13). The two friction heads (46) extend into the two side friction grooves (48) respectively.

9. A ball screw torque testing device according to claim 8, characterized in that: The optical bar (4) is slidably connected to a tail frame (49), the tail frame (49) is slidably connected to an adjusting rod (50), the right end of the adjusting rod (50) is rotatably connected to a tail chuck (51), the adjusting rod (50) is slidably connected to a driving cylinder (52), the driving cylinder (52) is rotatably connected to the left mounting frame (2), a driven gear ring (53) is fixedly connected to the driving cylinder (52), a control motor (54) is mounted on the left mounting frame (2), a driving gear ring (55) is fixedly connected to the output shaft of the control motor (54), the driving gear ring (55) is meshed with the driven gear ring (53), an inner screw barrel (56) is fixedly connected to the left mounting frame (2), and a round edge thread (57) matching the inner screw barrel (56) is provided on the adjusting rod (50).

10. A ball screw torque test method, characterized in that: A ball screw torque testing device according to any one of claims 1 to 9 is used, comprising the following steps: S1. Before the detection operation, first complete the installation of the ball screw torque test device, then match the driving force component, the electric slide (16), the electromagnet (13) and the visual camera (17) to form an electrical device of the corresponding circuit, and at the same time, match the driving force component, the electric slide (16), the electromagnet (13) and the visual camera (17) with a controller and perform operation debugging, and realize the operation control of the driving force component, the electromagnet (13) and the visual camera (17) through the controller. During the debugging process, the corresponding relationship between the current intensity in the electromagnet (13) and the magnetic force of the permanent magnet (15) and the corresponding relationship between the magnetic force and the relative friction between the load frame (8) and the friction frame (14) should be established, and finally the corresponding relationship between the current in the electromagnet (13) and the relative friction between the load frame (8) and the friction frame (14) is formed, so as to facilitate the control of the relative friction between the load frame (8) and the friction frame (14) by controlling the current in the electromagnet (13) during the screw detection process; S2. During the detection operation, first adjust the quick limit assembly to invalidate the relative limit effect of the quick limit assembly on the two pairs of moving frames (9), and control the two pairs of moving frames (9) to be relatively separated. When the gap generated by the relative separation of the two pairs of moving frames (9) can allow the screw to be detected to be inserted, stop the relative separation operation of the two pairs of moving frames (9), and place the screw to be detected in the area between the two pairs of moving frames (9) and form a movement into the three-jaw chuck (6), so that the screw to be detected can be inserted into the three-jaw chuck (6) to an appropriate length, and then the three-jaw chuck (6) forms an auxiliary clamping of the screw, and then the two pairs of moving frames (9) are controlled to approach each other again until they are in contact, and the quick limit assembly is used to form a mutual limit between the two pairs of moving frames (9), completing the preparation work before the screw detection; S3, the semi-threaded sleeves (11) in the two opposing shifting frames (9) cooperate with each other to form an integral threaded sleeve, and the integral threaded sleeve forms a threaded effect relative to the lead screw. Then, by applying current to the electromagnet (13), the relative friction force between the load frame (8) and the friction frame (14) is controlled to simulate the load under the actual operating state of the lead screw. Under the load simulation state, the force application component is driven to operate to realize the movement drive of the detected lead screw. Along with the movement of the lead screw, the visual camera (17) forms a corresponding detection with the lead screw as the target to form an auxiliary detection of the lead screw under load operation, realize the recording of the shape change state of the lead screw after the torque is applied and the quantification of data collection, and during the detection process of the visual camera (17), the electric slide (16) will control the visual camera (17) to form a relative movement along the detected lead screw to realize full coverage detection after the load is applied to the lead screw.

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