Ball screw automatic detection instrument detection structure and detection method thereof

Abstract

The application provides a detection structure and a detection method for a ball screw automatic detector, and belongs to the technical field of ball screw detection. The detection structure comprises a base, a ball screw rotating support assembly and a ball screw fixing support assembly are arranged on the top of the base, two fixed plates are symmetrically arranged on the outer side of the top of the base near the ball screw rotating support assembly and the ball screw fixing support assembly, a ball screw end clamping assembly one is arranged on one of the fixed plates, and a detection component supporting assembly is arranged between the two fixed plates. The application can select and adapt according to the required detection state of the ball screw, effectively support the ball screw in the detection state, not affect the detection of the ball screw, ensure that the ball screw is in detection in all directions, and effectively avoid the flexural deformation of the super-long ball screw due to its own weight during the measurement process, so as to cause the distortion of the helical line error measurement.

Description

Technical Field

[0001] This invention belongs to the field of ball screw testing technology, specifically relating to a testing structure and testing method for an automatic ball screw testing instrument. Background Technology

[0002] The automatic ball screw tester is a high-precision device used for the automated measurement of key precision parameters of ball screws. It can quickly and accurately detect core indicators such as lead error, backlash, stroke variation, and cumulative pitch error. It is widely used in precision machine tools, automation equipment, aerospace and other fields. It typically integrates a laser interferometer, grating ruler, high-precision servo system and intelligent data analysis software to achieve dynamic measurement and automatic evaluation of the entire stroke of the ball screw.

[0003] When dealing with ball screws exceeding 1 meter in length, the ball screw is prone to bending and deformation due to its own weight, which can lead to distortion in the measurement of helix error. In addition, the presence of the thread on the ball screw makes it difficult to provide effective support during testing, thus making it difficult to ensure the stability of the ball screw measurement.

[0004] Therefore, a detection structure and detection method for an automatic ball screw testing instrument are proposed. Summary of the Invention

[0005] This invention provides a detection structure and detection method for an automatic ball screw testing instrument, the purpose of which is to solve the problems mentioned above.

[0006] This invention provides a detection structure for an automatic ball screw testing instrument, including a base. A ball screw rotating support assembly and a ball screw fixed support assembly are disposed on the top of the base. Two fixing plates are symmetrically arranged on the top of the base near the outer sides of the ball screw rotating support assembly and the ball screw fixed support assembly. A ball screw end clamping assembly one is disposed on one of the fixing plates, and a testing component support assembly is disposed between the two fixing plates. A ball screw end clamping assembly two is disposed on the top of the base near the ball screw rotating support assembly and one of the fixing plates, and a support plate is disposed on the top of the base near the ball screw fixed support assembly and the other fixing plate. A ball screw is clamped between the ball screw end clamping assembly one and the ball screw end clamping assembly two. The ball screw rotary support assembly includes two hydraulic cylinders symmetrically arranged on the top of the base. The two hydraulic cylinders are fixedly connected to a lifting frame via their output ends on one side. A fixed plate is provided on the top of the lifting frame. A stepper motor is fixedly connected to the center of the bottom of the fixed plate via bolts. A rotary table is fixedly connected to the stepper motor via its output end on one side. Two proximity switches are symmetrically arranged through the outer wall of the rotary table, and two side through slots are symmetrically formed on the outer wall of adjacent proximity switches on the rotary table. Four top blocks are symmetrically arranged on the top of the rotary table, with each pair of top blocks positioned... Each set consists of several blocks, with a fixed magnet on the outer wall of one side facing each other. A movable block is slidably connected inside the rotating platform. A guide block is provided on the outer wall of the movable block near the inner side of the side passage groove, and a top protrusion is provided at the center of the top of the movable block. A movable magnet is provided on the outer wall of the top protrusion facing the fixed magnet. The movable magnet and the fixed magnet are connected by magnetic attraction. A screw-in post is threadedly connected to the center of the top of the top protrusion. A top rod is provided at the center of the top of the screw-in post, and a rolling ball is embedded in the top of the top rod.

[0007] Preferably, the ball screw fixed support assembly includes an adjustment platform located on the top of the base. A servo motor is mounted on one outer wall of the adjustment platform. The servo motor is fixedly connected to a bidirectional screw via its output end. Two adjustment slides are symmetrically arranged on the bidirectional screw. An L-shaped rod is mounted on the top of each adjustment slide. A semi-circular ring is mounted on one end of the L-shaped rod. A semi-circular hole is mounted on the inner circumference of the semi-circular ring. The inner sidewall of the semi-circular hole matches and fits the outer sidewall of the ball screw.

[0008] Preferably, a side plate is provided on one outer wall of the fixed plate. The ball screw end clamping assembly includes a drive motor provided on one outer wall of the side plate. The drive motor is fixedly connected to a drive gear through its output end on one side. A driven gear is rotatably connected to one outer wall of the fixed plate. The driven gear meshes with the drive gear. A rotating cover is provided on the outer wall of the driven gear away from the fixed plate. A ring is provided on the outer wall of the rotating cover away from the driven gear. A communicating cavity is opened on the rotating cover and the ring. Two electric push rods are symmetrically arranged on the outer wall of the rotating cover. A clamping platform is fixedly connected to the electric push rod through its output end on one side. A trapezoidal groove is opened on the outer wall of the clamping platform away from the electric push rod. A number of balls are mirror-embedded and rolled on the inner side wall of the trapezoidal groove.

[0009] Preferably, the second ball screw end clamping assembly includes a fixed frame disposed on the top of the base. A fixed cover is disposed on the outer side wall of the fixed frame. The outer side wall and the interior of the fixed cover are also provided with the cavity, electric push rod, trapezoidal groove and ball of the first ball screw end clamping assembly. The ball screw is clamped between the first ball screw end clamping assembly and the second ball screw end clamping assembly.

[0010] Preferably, the detection component support assembly includes a horizontal frame disposed between two fixed plates. Two vertical plates are symmetrically arranged at the bottom of the horizontal frame. A servo motor is mounted on one outer wall of one of the vertical plates. A trapezoidal lead screw is fixedly connected to the servo motor via its output end. A screw nut seat is provided on the trapezoidal lead screw. A laser interferometer is mounted on one flange face of the screw nut seat. A support platform is slidably connected inside the horizontal frame. A rod sleeve is provided at the bottom of the support platform. A movable rod is embedded at the bottom end of the rod sleeve. The bottom end of the movable rod is fixedly connected to another flange face of the screw nut seat. A fastening nut is threadedly connected to the outer circumference of the rod sleeve, and one end of the fastening nut abuts against the movable rod.

[0011] Preferably, a support plate is provided at the top of the base near the bottom of the ring, and the top of the support plate has an arc groove that matches the ring. By adopting the above technical solution, the ring can be supported, ensuring the stability of the ring's rotation.

[0012] Preferably, the ball at the top of the push rod is embedded in the thread of the ball screw, and the push rod is perpendicular to the ball screw; By adopting the above technical solution, the ball screw is supported by the push rod, which avoids the excessively long ball screw from bending and deforming due to its own weight during the measurement process, thus preventing the distortion of the helix error measurement.

[0013] This invention also provides a method for detecting a detection structure in an automatic ball screw testing instrument, comprising the following steps: S1: First, use the ball screw end clamping assembly one and the ball screw end clamping assembly two to perform horizontal positioning clamping on the ball screw to be tested. Specifically, first adjust the distance between the ball screw end clamping assembly two and the ball screw end clamping assembly one to provide space for the ball screw to be inserted into the ball screw end clamping assembly two and the ball screw end clamping assembly one, so that both ends of the ball screw are inserted into the interior of the ball screw end clamping assembly two and the ball screw end clamping assembly one respectively. Control the electric push rod to drive the clamping table to move through the output end on one side. The two clamping tables move towards each other. With the auxiliary positioning of the trapezoidal groove, one end of the ball screw is positioned and clamped by the two clamping tables, and the ball abuts against the outer peripheral surface of the ball screw, thus realizing the horizontal positioning clamping of the ball screw. S2: Then, depending on whether the ball screw is detected in a fixed state or in a rotating state, select the support method that is suitable for the ball screw. If the ball screw is detected in a fixed state, select the ball screw fixed support assembly to support it. If the ball screw is detected in a rotating state, select the ball screw rotating support assembly to support it. S3: When the ball screw is selected for fixed-state testing, the control servo motor drives the bidirectional screw to rotate through its output end on one side. The two adjusting slides on the bidirectional screw move towards each other. At this time, the L-shaped rod and the half-support ring at one end move synchronously. The two half-support rings cover the ball screw, and the inner circumferential surface of the semi-circular hole matches the outer circumferential surface of the ball screw. The ring structure formed by the two half-support rings supports the ball screw, avoiding the bending deformation of the ultra-long ball screw due to its own weight during the measurement process, which would lead to the distortion of the helix error measurement. In addition, the setting of two sets of ball screw fixed support components can make the two half-support rings in one set of ball screw fixed support components move away from each other during ball screw testing, avoiding obstruction of the ball screw and ensuring comprehensive testing. S4: When the ball screw is selected for testing in a rotating state, first select a matching push rod according to the thread depth on the ball screw so that the ball at the top of the push rod can be embedded in the thread on the ball screw. After selection, fix it inside the top protrusion using a screw-in pin. At this time, the push rod supports the ball screw, completing the preparation before ball screw testing. Then, control the drive motor to drive the drive gear to rotate through its output end. Under the meshing transmission between the drive gear and the driven gear, the drive gear pulls the driven gear to rotate. At this time, the ball screw end clamping assembly rotates as a whole. Since the ball screw is in clamping rotation, the ball screw rotates. As the ball screw rotates, the thread on the ball screw is pulled... The push rod moves horizontally because the moving block can only move horizontally along the rotary table. The push rod moves horizontally under the traction of the ball screw, ensuring that the push rod is always in a state of supporting the ball screw. The moving block on the top protrusion moves synchronously. When the moving block approaches the proximity switch, the fixed magnet and the movable magnet attract each other, thus fixing the position of the moving block relative to the rotary table. The stepper motor drives the rotary table to rotate through its output end on one side, and the push rod moves circumferentially synchronously. After the push rod disengages from the ball screw, it contacts and supports the ball screw again, realizing the reciprocating support of the ball screw. This avoids the excessively long ball screw from bending and deforming due to its own weight during the measurement process, which would cause the spiral error measurement to be distorted. S5: During testing, the second servo motor drives the trapezoidal screw to rotate through its output end on one side. As the trapezoidal screw rotates, it pulls the screw nut seat to move. The laser interferometer at the bottom of the screw nut seat moves synchronously. The laser interferometer moves linearly along the ball screw to test the ball screw. 6S: Finally, as the laser interferometer moves, the screw and nut seat synchronously pulls the sleeve and movable rod. At this time, the support platform moves horizontally along the horizontal frame. The screw and nut seat is supported by the detection component support assembly, ensuring the stable horizontal linear movement of the screw and nut seat, improving the detection accuracy, and indirectly achieving the purpose of supporting the trapezoidal screw.

[0014] The beneficial effects of this invention are as follows: 1. This invention, through the cooperation of the ball screw rotation support assembly and the ball screw fixed support assembly, can be selected and adapted according to the required detection state of the ball screw, and can effectively support the ball screw in the detection state without affecting the detection of the ball screw, ensuring that the ball screw is under detection in all directions, effectively avoiding the bending deformation of the ultra-long ball screw due to its own weight during the measurement process, which would lead to the distortion of the helix error measurement. 2. The present invention achieves horizontal positioning and clamping of the ball screw through the cooperation of the ball screw end clamping component one and the ball screw end clamping component two, ensuring that the ball screw and the laser interferometer are in an absolutely parallel state, ensuring the accuracy of detection, and also enabling the ball screw to rotate. The detection state of the ball screw can be switched according to the detection requirements. 3. The present invention supports the screw and nut seat by means of a detection component support assembly, which ensures the stable horizontal linear movement of the screw and nut seat, improves the detection accuracy, and indirectly achieves the purpose of supporting the trapezoidal lead screw.

[0015] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the ball screw rotation support assembly structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the fixed disk structure according to an embodiment of the present invention; Figure 4 This is an embodiment of the present invention. Figure 1 Enlarged diagram of point A in the diagram; Figure 5 This is an embodiment of the present invention. Figure 1 Enlarged diagram of point B in the diagram; Figure 6 This is a schematic diagram of a ball screw end clamping assembly according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the ball screw fixed support assembly structure according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the detection component support assembly structure according to an embodiment of the present invention; Reference numerals: 1. Base; 2. Ball screw rotary support assembly; 21. Hydraulic cylinder; 22. Lifting frame; 23. Fixed plate; 231. Stepper motor; 24. Rotating table; 241. Proximity switch; 242. Side through groove; 243. Top block; 2431. Fixed magnet; 25. Moving block; 251. Guide block; 26. Top protrusion; 261. Movable magnet; 27. Screw-connecting column; 28. Top rod; 3. Ball screw fixed support assembly; 31. Adjusting table; 311. Servo motor one; 312. Bidirectional screw; 32. Adjusting slide; 33. L-shaped rod; 34. Semi-support ring; 341. Semi-circular hole; 4. Fixed plate; 41. Side plate; 5. Ball screw 51. Drive motor; 511. Drive gear; 52. Rotating cover; 521. Driven gear; 522. Ring; 523. Cavity; 53. Electric push rod; 54. Clamping platform; 541. Trapezoidal groove; 542. Ball; 6. Ball screw end clamping assembly two; 61. Fixing frame; 62. Fixing cover; 7. Ball screw; 8. Detection component support assembly; 81. Horizontal frame; 82. Vertical plate; 821. Servo motor two; 83. Trapezoidal screw; 831. Screw nut seat; 84. Laser interferometer; 85. Support platform; 86. Rod sleeve; 87. Movable rod; 88. Fastening nut; 9. Support plate; 91. Arc groove. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] Example 1 Reference Figure 1-8This invention proposes a detection structure for an automatic ball screw testing instrument, including a base 1. A ball screw rotation support assembly 2 and a ball screw fixed support assembly 3 are provided on the top of the base 1. Two fixed plates 4 are symmetrically arranged on the top of the base 1 near the outer side of the ball screw rotation support assembly 2 and the ball screw fixed support assembly 3. A ball screw end clamping assembly 5 is provided on one of the fixed plates 4. A detection component support assembly 8 is provided between the two fixed plates 4. A ball screw end clamping assembly 6 is provided on the top of the base 1 near the ball screw rotation support assembly 2 and one of the fixed plates 4. A support plate 9 is provided on the top of the base 1 near the ball screw fixed support assembly 3 and the other fixed plate 4. A ball screw 7 is clamped between the ball screw end clamping assembly 5 and the ball screw end clamping assembly 6. The ball screw rotary support assembly 2 includes two hydraulic cylinders 21 symmetrically arranged on the top of the base 1. A lifting frame 22 is fixedly connected to the two hydraulic cylinders 21 via their output ends on one side. A fixed plate 23 is provided on the top of the lifting frame 22. A stepper motor 231 is fixedly connected to the center of the bottom of the fixed plate 23 via bolts. A rotary table 24 is fixedly connected to the stepper motor 231 via its output end on one side. Two proximity switches 241 are symmetrically arranged through the outer wall of the rotary table 24, and two side through slots 242 are symmetrically opened on the outer wall of adjacent proximity switches 241. Four top blocks 243 are symmetrically arranged on the top of the rotary table 24, with each pair of top blocks 243 forming a group. A fixed magnet 2431 is provided on the outer wall of the facing side of each group of top blocks 243. A moving block is slidably connected inside the rotary table 24. 25. A guide block 251 is provided on the outer side wall of the movable block 25 near the inner side of the side through groove 242. A top protrusion 26 is provided at the top center of the movable block 25. A movable magnet 261 is provided on the outer side of the top protrusion 26 facing the fixed magnet 2431. The movable magnet 261 and the fixed magnet 2431 are connected by magnetic adsorption. A screw-connected post 27 is screwed to the top center of the top of the top protrusion 26. A top rod 28 is provided at the top center of the top of the screw-connected post 27. A rolling ball is embedded in the top of the top rod 28. The ball at the top of the top rod 28 is embedded in the thread of the ball screw 7. The top rod 28 is perpendicular to the ball screw 7. The top rod 28 supports the ball screw 7 to prevent the excessively long ball screw 7 from bending and deforming due to its own weight during the measurement process, which would cause the spiral error measurement to be distorted. The ball screw fixed support assembly 3 includes an adjustment platform 31 located on the top of the base 1. A servo motor 311 is installed on one outer wall of the adjustment platform 31. The servo motor 311 is fixedly connected to a bidirectional screw 312 through its output end. Two adjustment slides 32 are symmetrically arranged on the bidirectional screw 312. An L-shaped rod 33 is installed on the top of each of the two adjustment slides 32. A semi-circular ring 34 is installed at one end of the L-shaped rod 33. A semi-circular hole 341 is installed on the inner circumferential surface of the semi-circular ring 34. The inner side wall of the semi-circular hole 341 matches and fits the outer side wall of the ball screw 7. A side plate 41 is provided on one outer wall of the fixed plate 4. The ball screw end clamping assembly 5 includes a drive motor 51 provided on one outer wall of the side plate 41. The drive motor 51 is fixedly connected to a drive gear 511 through its output end on one side. A driven gear 521 is rotatably connected to one outer wall of the fixed plate 4. The driven gear 521 and the drive gear 511 mesh. A rotating cover 52 is provided on the outer wall of the driven gear 521 away from the fixed plate 4. A ring 522 is provided on the outer wall of the rotating cover 52 away from the driven gear 521. The top of the base 1 is close to the ring 522. A support plate 9 is provided at the bottom. The top of the support plate 9 has an arc groove 91 that matches the ring 522, which can support the ring 522 and ensure the stability of the ring 522's rotation. A cavity 523 is provided on the rotating cover 52 and the ring 522. Two electric push rods 53 are symmetrically arranged on the outer wall of the rotating cover 52. The electric push rods 53 are fixedly connected to a clamping platform 54 through their output end on one side. A trapezoidal groove 541 is provided on the outer wall of the clamping platform 54 away from the electric push rods 53. Several rolling balls 542 are mirror-embedded and rolled on the inner wall of the trapezoidal groove 541. The ball screw end clamping assembly 2 6 includes a fixing frame 61 located on the top of the base 1. A fixing cover 62 is provided on the outer side wall of the fixing frame 61. The outer side wall and the interior of the fixing cover 62 are also provided with the cavity 523, electric push rod 53, trapezoidal groove 541 and ball 542 from the ball screw end clamping assembly 1 5. A ball screw 7 is clamped between the ball screw end clamping assembly 1 5 and the ball screw end clamping assembly 2 6. The detection component support assembly 8 includes a horizontal frame 81 located between two fixed plates 4. Two vertical plates 82 are symmetrically arranged at the bottom of the horizontal frame 81. A servo motor 821 is installed on one outer wall of one of the vertical plates 82. A trapezoidal lead screw 83 is fixedly connected to the output end of the servo motor 821. A screw nut seat 831 is installed on the trapezoidal lead screw 83. A laser interferometer 84 is installed on one flange face of the screw nut seat 831. A support platform 85 is slidably connected inside the horizontal frame 81. A rod sleeve 86 is provided at the bottom of the support platform 85. A movable rod 87 is embedded at the bottom end of the rod sleeve 86. The bottom end of the movable rod 87 is fixedly connected to another flange face of the screw nut seat 831. A fastening nut 88 is threadedly connected to the outer circumference of the rod sleeve 86. One end of the fastening nut 88 abuts against the movable rod 87.

[0019] Example 2 Reference Figure 1-8 This invention provides a detection method for a detection structure in an automatic ball screw testing instrument, comprising the following steps: S1: First, use the ball screw end clamping assembly 1 5 and the ball screw end clamping assembly 2 6 to perform horizontal positioning clamping of the ball screw 7 to be tested. Specifically, first adjust the distance between the ball screw end clamping assembly 2 6 and the ball screw end clamping assembly 1 5 to provide space for the ball screw 7 to be inserted into the ball screw end clamping assembly 2 6 and the ball screw end clamping assembly 1 5, so that both ends of the ball screw 7 are inserted into the interior of the ball screw end clamping assembly 2 6 and the ball screw end clamping assembly 1 5 respectively. Control the electric push rod 53 to drive the clamping table 54 to move through its output end on one side. The two clamping tables 54 move towards each other. With the auxiliary positioning of the trapezoidal groove 541, one end of the ball screw 7 is positioned and clamped by the two clamping tables 54. The ball 542 abuts against the outer peripheral surface of the ball screw 7 to achieve horizontal positioning clamping of the ball screw 7. S2: Then, depending on whether the ball screw 7 is detected in a fixed state or in a rotating state, select the support method that is compatible with the ball screw 7. If the ball screw 7 is detected in a fixed state, select the ball screw fixed support assembly 3 to support it. If the ball screw 7 is detected in a rotating state, select the ball screw rotating support assembly 2 to support it. S3: When the ball screw 7 is selected for fixed state detection, the control servo motor 311 drives the bidirectional screw 312 to rotate through its output end on one side. The two adjusting slides 32 on the bidirectional screw 312 move towards each other. At this time, the L-shaped rod 33 and the half-support ring 34 at one end move synchronously. The two half-support rings 34 cover the ball screw 7. The inner circumferential surface of the semi-circular hole 341 cooperates with the outer circumferential surface of the ball screw 7. The ring structure formed by the two half-support rings 34 supports the ball screw 7, avoiding the bending deformation of the ultra-long ball screw 7 due to its own weight during the measurement process, which would lead to the distortion of the helix error measurement. In addition, the setting of two sets of ball screw fixed support components 3 can make the two half-support rings 34 in one set of ball screw fixed support components 3 move away from each other when the ball screw 7 is detected, so as to avoid obstructing the ball screw 7 and ensure comprehensive detection. S4: When the ball screw 7 is selected for testing in a rotating state, first select a matching push rod 28 according to the thread depth on the ball screw 7 so that the ball at the top of the push rod 28 can be embedded in the thread on the ball screw 7. After selection, fix it inside the top protrusion 26 using the screw-connecting post 27. At this time, the push rod 28 supports the ball screw 7, completing the preparation before testing the ball screw 7. Then, control the drive motor 51 to drive the drive gear 511 to rotate through its output end on one side. Under the meshing transmission between the drive gear 511 and the driven gear 521, the drive gear 511 pulls the driven gear 521 to rotate. At this time, the ball screw end clamping assembly 5 rotates as a whole. Since the ball screw 7 is in the clamping rotation, the ball screw 7 rotates. As the ball screw 7 rotates, the thread on the ball screw 7 pulls the push rod 28 to move. Since the moving block 25 can only move horizontally along the rotating table 24, the push rod 28 moves horizontally under the traction of the ball screw 7, ensuring that the push rod 28 is always in a supporting state for the ball screw 7. The moving block 25 on the top protrusion 26 moves synchronously. When the moving block 25 approaches the proximity switch 241, the fixed magnet 2431 and the movable magnet 261 are attracted together, thus fixing the position of the moving block 25 relative to the rotating table 24. The stepper motor 231 drives the rotating table 24 to rotate 180 degrees through its output end on one side, and the push rod 28 moves 180 degrees circumferentially in sync. After the push rod 28 is separated from the ball screw 7, it contacts the ball screw 7 again and supports it, thus achieving reciprocating support for the ball screw 7. This avoids the excessively long ball screw 7 from bending and deforming due to its own weight during the measurement process, which would cause the spiral error measurement to be distorted. S5: During testing, the control servo motor 821 drives the trapezoidal screw 83 to rotate through its output end on one side. As the trapezoidal screw 83 rotates, it pulls the screw nut seat 831 to move. The laser interferometer 84 at the bottom of the screw nut seat 831 moves synchronously. The laser interferometer 84 moves linearly along the ball screw 7 to test the ball screw 7. S6: Finally, as the laser interferometer 84 moves, the screw nut seat 831 synchronously pulls the rod sleeve 86 and the movable rod 87 to move. At this time, the support platform 85 moves horizontally along the horizontal frame 81. The screw nut seat 831 is supported by the detection component support assembly 8, which ensures the stable horizontal linear movement of the screw nut seat 831, improves the detection accuracy, and indirectly achieves the purpose of supporting the trapezoidal screw 83.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A detection structure for an automatic ball screw testing instrument, characterized in that: The base (1) includes a ball screw rotating support assembly (2) and a ball screw fixed support assembly (3) on its top. Two fixed plates (4) are symmetrically arranged on the top of the base (1) near the outer side of the ball screw rotating support assembly (2) and the ball screw fixed support assembly (3). A ball screw end clamping assembly (5) is provided on one of the fixed plates (4). A detection component support assembly (8) is provided between the two fixed plates (4). A ball screw end clamping assembly (6) is provided between the top of the base (1) near the ball screw rotating support assembly (2) and one of the fixed plates (4). A support plate (9) is provided between the top of the base (1) near the ball screw fixed support assembly (3) and the other fixed plate (4). A ball screw (7) is clamped between the ball screw end clamping assembly (5) and the ball screw end clamping assembly (6). The ball screw rotary support assembly (2) includes two hydraulic cylinders (21) symmetrically arranged on the top of the base (1). The two hydraulic cylinders (21) are fixedly connected to a lifting frame (22) through the output end on one side. A fixed plate (23) is provided on the top of the lifting frame (22). A stepper motor (231) is fixedly connected to the center of the bottom of the fixed plate (23) by bolts. A rotary table (24) is fixedly connected to the output end on one side of the stepper motor (231). Two proximity switches (241) are symmetrically arranged through the outer wall of the rotary table (24). Two side through slots (242) are symmetrically opened on the outer wall of the adjacent proximity switches (241) of the rotary table (24). Four top blocks (243) are symmetrically arranged on the top of the rotary table (24). The four top blocks (243) are arranged in pairs. Each set of top blocks (243) has a fixed magnet (2431) on one side of the outer wall facing each other. The rotating table (24) has a sliding block (25) inside. The outer wall of the moving block (25) is provided with a guide block (251) near the inner side of the side through groove (242). The top center of the moving block (25) is provided with a top protrusion (26). The outer wall of the top protrusion (26) facing the fixed magnet (2431) is provided with a movable magnet (261). The movable magnet (261) and the fixed magnet (2431) are connected by magnetic adsorption. The top center of the top protrusion (26) is connected by a screw thread with a screw threaded connection. The top center of the screw thread (27) is provided with a top rod (28). A rolling ball is embedded in the top of the top rod (28).

2. The detection structure for an automatic ball screw testing instrument according to claim 1, characterized in that: The ball screw fixed support assembly (3) includes an adjustment platform (31) located on the top of the base (1). A servo motor (311) is provided on one side of the outer wall of the adjustment platform (31). The servo motor (311) is fixedly connected to a bidirectional screw (312) through its output end. Two adjustment slides (32) are symmetrically arranged on the bidirectional screw (312). An L-shaped rod (33) is provided on the top of each of the two adjustment slides (32). A semi-circular hole (34) is provided at one end of the L-shaped rod (33). A semi-circular hole (341) is provided on the inner circumferential surface of the semi-circular hole (341). The inner side wall of the semi-circular hole (341) matches and fits the outer side wall of the ball screw (7).

3. The detection structure for an automatic ball screw testing instrument according to claim 1, characterized in that: A side plate (41) is provided on one side outer wall of the fixed plate (4). The ball screw end clamping assembly (5) includes a drive motor (51) provided on one side outer wall of the side plate (41). The drive motor (51) is fixedly connected to a drive gear (511) through its output end. A driven gear (521) is rotatably connected to one side outer wall of the fixed plate (4). The driven gear (521) and the drive gear (511) mesh with each other. A rotating cover (52) is provided on the side outer wall of the driven gear (521) away from the fixed plate (4). A ring (522) is provided on the outer wall of the rotating cover (52) away from the driven gear (521). A cavity (523) is opened on the rotating cover (52) and the ring (522). Two electric push rods (53) are symmetrically arranged on the outer wall of the rotating cover (52). The electric push rod (53) is fixedly connected to a clamping platform (54) through its output end. A trapezoidal groove (541) is opened on the outer wall of the clamping platform (54) away from the electric push rod (53). Several balls (542) are embedded and rolled in a mirror image on the inner wall of the trapezoidal groove (541).

4. The detection structure for an automatic ball screw testing instrument according to claim 3, characterized in that: The second ball screw end clamping assembly (6) includes a fixed frame (61) located on the top of the base (1). A fixed cover (62) is provided on the outer side wall of the fixed frame (61). The outer side wall and the interior of the fixed cover (62) are also provided with a cavity (523), an electric push rod (53), a trapezoidal groove (541) and a ball (542) from the first ball screw end clamping assembly (5). A ball screw (7) is clamped between the first ball screw end clamping assembly (5) and the second ball screw end clamping assembly (6).

5. The detection structure for an automatic ball screw testing instrument according to claim 1, characterized in that: The detection component support assembly (8) includes a horizontal frame (81) disposed between two fixed plates (4). Two vertical plates (82) are symmetrically arranged at the bottom of the horizontal frame (81). A servo motor (821) is mounted on one outer wall of one of the vertical plates (82). The servo motor (821) is fixedly connected to a trapezoidal lead screw (83) via its output end. A screw nut seat (831) is mounted on the trapezoidal lead screw (83). One flange face of the screw nut seat (831) is fitted with... Equipped with a laser interferometer (84), the horizontal frame (81) is internally slidably connected to a support platform (85), the bottom of the support platform (85) is provided with a rod sleeve (86), the bottom end of the rod sleeve (86) is embedded with a movable rod (87), the bottom end of the movable rod (87) is fixedly connected to another flange face in the screw nut seat (831), and a fastening nut (88) is threadedly connected to the outer circumference of the rod sleeve (86), one end of the fastening nut (88) abuts against the movable rod (87).

6. The detection structure for an automatic ball screw testing instrument according to claim 1, characterized in that: A support plate (9) is provided at the top of the base (1) near the bottom of the ring (522), and the top of the support plate (9) has an arc groove (91) that matches the ring (522).

7. The detection structure for an automatic ball screw testing instrument according to claim 1, characterized in that: The ball at the top of the push rod (28) is embedded in the thread of the ball screw (7), and the push rod (28) is perpendicular to the ball screw (7).

8. The detection method for the detection structure of an automatic ball screw testing instrument according to claim 1, characterized in that: Includes the following steps: S1: First, use the ball screw end clamping assembly one (5) and the ball screw end clamping assembly two (6) to horizontally position and clamp the ball screw (7) to be tested. Specifically, first adjust the distance between the ball screw end clamping assembly two (6) and the ball screw end clamping assembly one (5) to provide space for the ball screw (7) to be inserted into the ball screw end clamping assembly two (6) and the ball screw end clamping assembly one (5), so that both ends of the ball screw (7) are inserted respectively. Inside the ball screw end clamping assembly 2 (6) and the ball screw end clamping assembly 1 (5), the control electric push rod (53) drives the clamping platform (54) to move through its output end on one side. The two clamping platforms (54) move towards each other. With the auxiliary positioning of the trapezoidal groove (541), one end of the ball screw (7) is positioned and clamped by the two clamping platforms (54). The ball (542) abuts against the outer circumferential surface of the ball screw (7) to achieve horizontal positioning and clamping of the ball screw (7). S2: Then, according to the detection method of the ball screw (7) (whether the ball screw (7) is detected in a fixed state or in a rotating state), select the support method that is compatible with the ball screw (7). If the ball screw (7) is detected in a fixed state, select the ball screw fixed support assembly (3) to support it. If the ball screw (7) is detected in a rotating state, select the ball screw rotating support assembly (2) to support it. S3: When the ball screw (7) is selected to detect in a fixed state, the control servo motor (311) drives the bidirectional screw (312) to rotate through its output end on one side. The two adjusting slides (32) on the bidirectional screw (312) move towards each other. At this time, the L-shaped rod (33) and the half-support ring (34) at one end move synchronously. The two half-support rings (34) cover the ball screw (7), and the inner circumferential surface of the semi-circular hole (341) matches the outer circumferential surface of the ball screw (7). The ball screw (7) is supported by the ring structure formed by the two semi-support rings (34), which prevents the excessively long ball screw (7) from bending and deforming due to its own weight during the measurement process, resulting in distortion of the helix error measurement. In addition, the setting of the two sets of ball screw fixed support components (3) can make the two semi-support rings (34) in one set of ball screw fixed support components (3) far apart when the ball screw (7) is tested, so as to avoid obstructing the ball screw (7) and ensure comprehensive testing. S4: When the ball screw (7) is selected for testing in a rotating state, first select a matching push rod (28) according to the thread depth on the ball screw (7) so that the ball at the top of the push rod (28) can be embedded in the thread on the ball screw (7). After the matching is selected, use the screw thread (27) to fix it inside the top protrusion (26). At this time, the push rod (28) supports the ball screw (7) to complete the preparation before the ball screw (7) is tested. Then, control the drive motor (51) The drive gear (511) is driven to rotate through the output end on one side. Under the meshing transmission between the drive gear (511) and the driven gear (521), the drive gear (511) pulls the driven gear (521) to rotate. At this time, the end clamping assembly (5) of the ball screw rotates as a whole. Since the ball screw (7) is in the clamping rotation, the ball screw (7) rotates. As the ball screw (7) rotates, the thread traction rod (28) on the ball screw (7) moves. Since the movable block (25) can only move horizontally along the rotating table (24), the push rod (28) moves horizontally under the traction of the ball screw (7), ensuring that the push rod (28) is always in a supporting state on the ball screw (7). The movable block (25) on the top protrusion (26) moves synchronously. When the movable block (25) approaches the proximity switch (241), the fixed magnet (2431) and the movable magnet (261) are attracted together, realizing the movement of the movable block (25). Compared to the fixed position of the rotating stage (24), the stepper motor (231) drives the rotating stage (24) to rotate 180 degrees through its output end on one side. The push rod (28) moves 180 degrees in circumferential direction in sync. After the push rod (28) disengages from the ball screw (7), it contacts the ball screw (7) again and supports it, realizing the reciprocating support of the ball screw (7). This avoids the excessively long ball screw (7) from bending and deforming due to its own weight during the measurement process, which would lead to the distortion of the spiral error measurement. S5: During the test, the second servo motor (821) drives the trapezoidal screw (83) to rotate through the output end on one side. As the trapezoidal screw (83) rotates, the trapezoidal screw (83) pulls the screw nut seat (831) to move. The laser interferometer (84) at the bottom of the screw nut seat (831) moves synchronously. The laser interferometer (84) moves linearly along the ball screw (7) to test the ball screw (7). S6: Finally, as the laser interferometer (84) moves, the screw nut seat (831) synchronously pulls the rod sleeve (86) and the movable rod (87) to move. At this time, the support platform (85) moves horizontally along the horizontal frame (81). The screw nut seat (831) is supported by the detection component support assembly (8), which ensures the stable horizontal linear movement of the screw nut seat (831), improves the detection accuracy, and indirectly achieves the purpose of supporting the trapezoidal screw (83).

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