Friction force detection device for ball screw

Abstract

The utility model discloses a friction force detection device for a ball screw, which relates to the technical field of ball screw detection equipment and comprises a detection table and a longitudinal sliding channel I arranged at the center of the top of the detection table. Two fixing mechanisms I are symmetrically arranged at the two ends in the sliding channel I relative to the console, and each of the two fixing mechanisms I comprises a moving platform II which is connected to the inner wall of the bottom of the sliding channel I in a sliding manner; according to the utility model, the axial lead of the ball screw to be detected can be stably fixed on a horizontal straight line through the two fixing mechanisms I, and the self-locking function of the worm gear and the worm can be matched, so that the situation that the fixing effect is weakened due to the rotation of the ball screw during the detection period can be prevented; by means of the ball screw fixing device, operators can fix the ball screw more simply, fine adjustment and fine placement are not needed, the overall detection efficiency is improved, and meanwhile the influence on detection due to fixing position deviation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of ball screw detection equipment, in particular to a friction force detection device for a ball screw. Background Technique

[0002] A ball screw, also known as a ball screw or a hollow screw, is a transmission element widely used in machine tools and precision machinery. Its main function is to convert rotational motion into linear motion, or convert linear motion into rotational motion, and at the same time has the characteristics of high precision, reversibility and high efficiency. It is widely used in various industrial equipment and precision instruments, such as CNC machine tools, semiconductor manufacturing equipment, industrial robots, etc.

[0003] The friction force detection of a ball screw pair usually involves measuring its frictional torque under different conditions, including rotational speed, load, preload, etc. Through precise measurement, the friction performance of the ball screw pair can be understood, so as to provide strong support for its performance optimization and production quality control. The dynamic detection method is to use a motor to drive the ball screw to rotate, and measure the frictional torque through a high-precision torque sensor. During the measurement, if there are deviations in the fixation of the ball screw, such as the ball screw being skewed, the axis of the ball screw not being aligned with the detection equipment, etc., it will cause friction force fluctuations and affect the detection results.

[0004] In view of this, this application is specifically proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a friction force detection device for a ball screw to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, a friction force detection device for a ball screw provided by the utility model includes a detection table and a longitudinal sliding channel one arranged at the center of the top of the detection table. A control console is fixedly connected to the center of the sliding channel one. Two fixing mechanisms one are symmetrically arranged at both ends in the sliding channel one with respect to the control console. Each of the two fixing mechanisms one includes a moving platform two slidably connected to the inner wall of the bottom of the sliding channel one. The moving platform two is of a hollow structure. A vertical external gear ring is rotatably arranged inside the moving platform two. Five limiting plates are arranged in an annular array on the inner side of the external gear ring. One end of each of the five limiting plates, which is far from the center of the external gear ring on the side wall close to the control console, is rotatably connected to a fixing rod. The end of the fixing rod far from the limiting plate is rotatably connected to the side wall of the external gear ring close to the control console. A roller is rotatably connected to the arc wall of each of the five limiting plates close to the center of the external gear ring. One end of each of the five limiting plates, which is far from the roller and close to the center of the external gear ring, is rotatably connected to the inner wall of the moving platform two;

[0007] One end of the bottom of the outer tooth ring in one of the fixing mechanisms is meshed and connected with a gear. One end of the gear away from the control console is fixedly connected with a worm gear. One side of the worm gear away from the outer tooth ring is meshed and connected with a worm. Longitudinal storage channels are provided at the centers of the side walls of the two moving platforms II close to each other.

[0008] Further, on both sides of the bottom end of the side wall of the two moving platforms II close to each other, sliding channels II are respectively provided. In the middle of the bottom end of the side wall of the two moving platforms II close to each other, sliding channels III are provided. The sliding channels III and the two sliding channels II are on the same horizontal line. On both sides inside the sliding channel I, guide rods are respectively fixedly connected. Between the two guide rods, a bidirectional threaded rod is arranged. The two ends of the bidirectional threaded rod are respectively rotatably connected to the inner walls of the sliding channel I. The two guide rods and the bidirectional threaded rod are all on the same horizontal line. The guide rods are slidably connected to the sliding channels II at the bottom ends of the two moving platforms II on the same side. The bidirectional threaded rod is rotatably connected to the sliding channels III at the bottom ends of the two moving platforms II.

[0009] Further, a bidirectional telescopic rod is installed on the side wall of the two moving platforms II close to each other. The bidirectional telescopic rod includes two telescopic rods with the fixed ends fixedly connected to each other and the same structure. The two ends of the bidirectional telescopic rod respectively penetrate through the two moving platforms II. The two ends of the bidirectional telescopic rod are respectively fixedly connected to the gears in the two fixing mechanisms I. At the bottom of the worm, a drive source II for driving the worm is installed. The centers of the inscribed circles of the outer arc walls of the five rollers in the two fixing mechanisms I are on the same straight line.

[0010] Further, on both sides of one end of the top of the detection table, longitudinal sliding channels I are provided. The length direction of the sliding channels I is the same as the length direction of the detection table. One end of the sliding channels I is close to the edge of the top of the detection table, and the other end of the sliding channels I is close to the center of the top of the control console. Electric guide rails are laid in the sliding channels I. There are sliders on the electric guide rails. The tops of the two sliders are fixedly connected to the same moving platform I. On the side wall of the moving platform I close to the control console, a longitudinal groove I is provided. A fixing mechanism II is installed in the groove I.

[0011] Further, the fixing mechanism II includes a drive source I installed at one end of the inner arc wall of the groove I away from the control console. The output end of the drive source I is arranged towards the fixing mechanism I. The output end of the side wall of the drive source I close to the control console is fixedly connected with a rotating shaft I. On the outer arc wall of the rotating shaft I, three arc-shaped grooves are arranged in an annular array. Electric telescopic rods are abutted in the arc-shaped grooves. The fixed ends of the three electric telescopic rods are fixedly connected to the same fixing ring I. The fixing ring I is rotatably connected to the inner arc wall of the groove I.

[0012] Further, a turntable is fixedly connected to a side wall of the first rotating shaft away from the first driving source. A wire coil is fixedly connected to a side wall of the turntable away from the first rotating shaft. Three limiting blocks distributed in an annular array are abutted against a side wall of the turntable away from the first rotating shaft. A second sliding groove is provided on a side wall of each of the three limiting blocks close to the wire coil. The wire coil is slidably connected in the second sliding groove. A second fixing ring is fixedly connected to an edge of a side wall of the turntable away from the first rotating shaft. A fourth sliding channel penetrating through is provided at a position corresponding to each of the three limiting blocks on an outer arc wall of the second fixing ring. A baffle is fixedly connected to a side wall of the second fixing ring away from the turntable. The three limiting blocks are abutted against a side wall of the baffle close to the turntable.

[0013] Further, a longitudinal placing groove is provided at the center of a side wall of the turntable close to the first fixing mechanism. A fifth sliding channel penetrating longitudinally is provided at the center of a side wall of the baffle close to the first fixing mechanism. The fifth sliding channel and the placing groove are coaxially arranged.

[0014] Further, the control console is fixedly connected to the center of the inner wall of the bottom of the first sliding channel. Both of the two guiding rods and the bidirectional threaded rod penetrate through two parallel side walls in the width direction of the control console. A third driving source for driving the bidirectional threaded rod to rotate is arranged inside the control console. The same workpiece to be detected is abutted inside the two first fixing mechanisms.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] 1. Through the two first fixing mechanisms, the axis line of the ball screw to be detected can be stably fixed on a horizontal straight line. Cooperating with the self-locking function of the worm and worm gear, it can prevent the rotation of the ball screw during detection from weakening the fixing effect, enabling the operator to fix the ball screw more simply without "fine adjustment and slow release", improving the overall detection efficiency, and reducing the influence on detection caused by fixing position deviation at the same time;

[0017] 2. Through the second fixing mechanism, most types of ball screws with different cross-sectional radii can be clamped and fixed, and a stable power source for rotation can be provided. Just place one end of the ball screw at the entrance of the second fixing mechanism to quickly and stably fix it. Driven by the first driving source, the ball screw is driven to rotate for detection, eliminating the cumbersome disassembly and assembly steps when replacing the ball screw to be detected in the past, reducing manual intervention, and avoiding the possibility of affecting the detection result due to improper manual operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of a friction detection device for a ball screw;

[0019] Figure 2 It is Figure 1 the schematic diagram of the structure at A in

[0020] Figure 3 The internal structure diagram of the second moving platform in a friction detection device for a ball screw;

[0021] Figure 4 For Figure 1 The structure diagram at position B in;

[0022] Figure 5 The structure diagram of the second viewing angle of the detection table in a friction detection device for a ball screw;

[0023] Figure 6 The working state diagram of a friction detection device for a ball screw.

[0024] In the figure:

[0025] 10. Detection table; 11. First moving platform; 12. Workpiece to be detected; 13. Control console; 14. Guide rod; 15. Bidirectional threaded rod; 16. Bidirectional telescopic rod;

[0026] 20. First fixing mechanism; 21. Second moving platform; 22. Gear; 23. External gear ring; 24. Roller; 25. Limiting plate; 26. Fixed rod; 27. Worm gear; 28. Worm;

[0027] 30. Second fixing mechanism; 31. First driving source; 32. First fixing ring; 33. First rotating shaft; 34. Electric telescopic rod; 35. Turntable; 36. Second fixing ring; 37. Limiting block; 38. Coiled wire. Detailed implementation manners

[0028] 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 of 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.

[0029] Please refer to Figures 1-6 , the present invention provides a technical solution:

[0030] Refer to Figures 1-6As shown in the figure, a friction detection device for a ball screw includes a detection table 10 and a longitudinal sliding channel 1 at the center of the top of the detection table 10. A control console 13 is fixedly connected to the center of the sliding channel 1. Two fixing mechanisms 1 20 are symmetrically arranged at both ends in the sliding channel 1 with respect to the control console 13. Each of the two fixing mechanisms 1 20 includes a moving platform 2 21 slidably connected to the inner wall of the bottom of the sliding channel 1. The moving platform 2 21 is of a hollow structure. A vertical external gear ring 23 is rotatably arranged inside the moving platform 2 21. Five limiting plates 25 are arranged in an annular array on the inner side of the external gear ring 23. One end of each of the five limiting plates 25, which is far from the center of the external gear ring 23, on the side wall close to the control console 13 is rotatably connected to a fixing rod 26. The end of the fixing rod 26 far from the limiting plate 25 is rotatably connected to the side wall of the external gear ring 23 close to the control console 13. A roller 24 is rotatably connected to the arc wall of each of the five limiting plates 25 close to the center of the external gear ring 23. One end of each of the five limiting plates 25, which is far from the roller 24, on the side wall close to the center of the external gear ring 23 is rotatably connected to the inner wall of the moving platform 2 21;

[0031] At the bottom end of one side of the external gear ring 23 in one of the fixing mechanisms 1 20, a gear 22 is meshed and connected. One end of the gear 22 far from the control console 13 is fixedly connected to a worm gear 27. On the side of the worm gear 27 far from the external gear ring 23, a worm 28 is meshed and connected. A longitudinally penetrating placement channel is provided at the center of the side wall of each of the two moving platforms 2 21 close to each other.

[0032] It should be noted that the external gear ring 23 is rotatably connected to the inner side wall of the moving platform 2 21. The extending direction of the axis of the external gear ring 23 is consistent with the length direction of the detection table 10. The side wall of the limiting plate 25 close to the control console 13 and the side wall of the external gear ring 23 close to the control console 13 are on the same plane. Only the fixing mechanism 1 20 close to the moving platform 11 is provided with the worm gear 27 and the worm 28;

[0033] The roller 24 is rotatably connected to one end of the arc wall of the limiting plate 25 close to the center of the external gear ring 23, and one side of the end of the limiting plate 25 close to the center of the external gear ring 23 far from the roller 24 is rotatably connected to the inner wall of the moving platform 2 21.

[0034] Refer to Figures 1-6As shown in the figure, a friction detection device for a ball screw. On both sides of the bottom end of the side walls of two moving platforms II 21 close to each other, sliding channels II are respectively provided. In the middle of the bottom end of the side walls of two moving platforms II 21 close to each other, sliding channels III are provided. The sliding channel III and the two sliding channels II are on the same horizontal line. On both sides inside the sliding channel I, guide rods 14 are respectively fixedly connected. Between the two guide rods 14, a bidirectional threaded rod 15 is arranged. The two ends of the bidirectional threaded rod 15 are respectively rotatably connected to the inner walls of the sliding channel I. The two guide rods 14 and the bidirectional threaded rod 15 are all on the same horizontal line. The guide rods 14 are slidably connected to the sliding channels II at the bottom ends of the two moving platforms II 21 on the same side. The bidirectional threaded rod 15 is rotatably connected to the sliding channels III at the bottom ends of the two moving platforms II 21.

[0035] It should be noted that no thread grooves are provided on the outer arc wall of the part of the bidirectional threaded rod 15 inside the control console 13. When the bidirectional threaded rod 15 rotates, it will drive the fixed mechanisms I 20 on both sides to gather or separate synchronously. The guide rods 14 prevent the fixed mechanisms I 20 from running off during this period.

[0036] Refer to Figures 1-6 As shown in the figure, a friction detection device for a ball screw. On the side walls of two moving platforms II 21 close to each other, a bidirectional telescopic rod 16 is installed. The bidirectional telescopic rod 16 includes two telescopic rods with the fixed ends fixedly connected to each other and the same structure. The two ends of the bidirectional telescopic rod 16 respectively penetrate through the two moving platforms II 21. The two ends of the bidirectional telescopic rod 16 are respectively fixedly connected to the gears 22 in the two fixed mechanisms I 20. At the bottom of the worm 28, a drive source II for driving the worm 28 is installed. The centers of the inscribed circles of the outer arc walls of the five rollers 24 in the two fixed mechanisms I 20 are on the same straight line.

[0037] It should be noted that the bidirectional telescopic rod 16 is for transmitting torque. When the worm 28 in the fixed mechanism I 20 close to the moving platform I 11 drives the worm gear 27 to rotate, the worm gear 27 drives the gear 22 to rotate. The gear 22 in the fixed mechanism I 20 close to the moving platform I 11 drives the gear 22 in the fixed mechanism I 20 far from the moving platform I 11 to rotate through the bidirectional telescopic rod 16 to realize the synchronous operation of the two fixed mechanisms I 20.

[0038] Refer to Figures 1-6As shown in the figure, a friction detection device for a ball screw, on both sides of one end of the top of the detection table 10, there are longitudinal first chutes. The length direction of the first chutes is consistent with the length direction of the detection table 10. One end of the first chutes is close to the edge of the top of the detection table 10, and the other end of the first chutes is close to the center of the top of the control console 13. An electric guide rail is laid in the first chutes, and there are sliders on the electric guide rail. On the tops of the two sliders, there is fixedly connected the same first moving platform 11. On one side wall of the first moving platform 11 close to the control console 13, there is a longitudinally penetrating first groove, and a second fixing mechanism 30 is installed in the first groove.

[0039] It should be noted that the electric guide rail in the first chutes is used to drive the sliders to move, and the sliders drive the first moving platform 11 to slide in the first chutes. In fact, the distance of the first chutes determines the longest length and the shortest length of the workpiece 12 to be detected that can be borne.

[0040] Refer to Figures 1-6 As shown in the figure, a friction detection device for a ball screw, the second fixing mechanism 30 includes a first driving source 31 installed at one end of the inner arc wall of the first groove far from the control console 13. The output end of the first driving source 31 faces the first fixing mechanism 20. The output end of the first driving source 31 on the side wall close to the control console 13 is fixedly connected with a first rotating shaft 33. On the outer arc wall of the first rotating shaft 33, there are three arc-shaped grooves distributed in an annular array. Electric telescopic rods 34 are abutted in the arc-shaped grooves. The fixed ends of the three electric telescopic rods 34 are fixedly connected with the same first fixing ring 32, and the first fixing ring 32 is rotatably connected to the inner arc wall of the first groove.

[0041] It should be noted that the fixed ends of the three electric telescopic rods 34 are fixedly connected to the inner arc wall of the first fixing ring 32, and the three electric telescopic rods 34 all face the first rotating shaft 33.

[0042] Refer to Figures 1-6 As shown in the figure, a friction detection device for a ball screw, on the side wall of the first rotating shaft 33 far from the first driving source 31, there is fixedly connected a turntable 35. On the side wall of the turntable 35 far from the first rotating shaft 33, there is fixedly connected a wire coil 38. On the side wall of the turntable 35 far from the first rotating shaft 33, there are three limit blocks 37 distributed in an annular array abutted. On the side wall of the three limit blocks 37 close to the wire coil 38, there are second chutes, and the wire coil 38 is slidably connected in the second chutes. At the edge of the side wall of the turntable 35 far from the first rotating shaft 33, there is fixedly connected a second fixing ring 36. At the positions corresponding to the three limit blocks 37 on the outer arc wall of the second fixing ring 36, there are all penetrating fourth sliding channels. On the side wall of the second fixing ring 36 far from the turntable 35, there is fixedly connected a baffle plate, and the three limit blocks 37 are abutted on the side wall of the baffle plate close to the turntable 35.

[0043] It should be noted that the fifth sliding channel, the first storage groove, and the storage channel are all coaxially arranged.

[0044] Refer to Figures 1-6 As shown, a friction detection device for a ball screw. At the center of the side wall of the turntable 35 close to the first fixing mechanism 20, there is a longitudinal placement groove. At the center of the side wall of the baffle close to the first fixing mechanism 20, there is a longitudinally penetrating sliding channel five, and the sliding channel five is coaxially arranged with the placement groove.

[0045] It should be noted that the sliding channel one is used to place one end of the ball screw for clamping it, and the placement groove is the reserved space for clamping some ball screws with a relatively large cross-sectional radius.

[0046] Refer to Figures 1-6 As shown, a friction detection device for a ball screw. The control console 13 is fixedly connected to the center of the inner wall of the bottom of the sliding channel one. Both of the two guide rods 14 and the bidirectional threaded rod 15 penetrate through the two parallel side walls of the control console 13 in the width direction. A driving source three for driving the bidirectional threaded rod 15 to rotate is arranged inside the control console 13. The same workpiece to be detected 12 is abutted inside the two first fixing mechanisms 20.

[0047] It should be noted that the workpiece to be detected 12 shown in the figure is only one case, and the applicable range is determined by the radius of the placement channel on the first fixing mechanism 20, the length of the first sliding groove, and the load-bearing capacity of the first fixing mechanism 20 and the second fixing mechanism 30.

[0048] Working principle:

[0049] First, insert both ends of the workpiece to be detected 12 into the two first fixing mechanisms 20 respectively. Adjust the distance between the two first fixing mechanisms 20 according to the length of the workpiece to be detected 12. Subsequently, the driving source two drives the worm 28 to rotate, and through the bidirectional telescopic rod 16, the two first fixing mechanisms 20 simultaneously fix the workpiece to be detected 12. When the five rollers 24 are completely abutted against the workpiece to be detected 12, the fixing is completed. Subsequently, the first moving platform 11 slides to drive the second fixing mechanism 30 to clamp one end of the workpiece to be detected 12. When the electric telescopic rod 34 does not extend, control the rotation of the wire spool 38 to clamp or release the workpiece to be detected 12. When the electric telescopic rod 34 extends and abuts against the arc-shaped groove on the outer arc wall of the first rotating shaft 33, the second fixing mechanism 30 as a whole rotates to drive the workpiece to be detected 12 to rotate except for the driving source one 31, and the first fixing mechanism 20 will firmly fix the workpiece to be detected 12 while ensuring the rotation of the workpiece to be detected 12 under the action of the rollers 24.

Claims

1. A friction force detection device for a ball screw, comprising a detection platform (10) and a longitudinal sliding channel 1 arranged at the center of the top of the detection platform (10), a control console (13) being fixedly connected to the center of the sliding channel 1, and two fixing mechanisms 1 (20) being symmetrically arranged at both ends of the sliding channel 1 about the control console (13), characterized in that: The two fixing mechanisms (20) each comprise a moving platform (21) slidably connected to the inner wall of the bottom of the sliding channel; the moving platform (21) is a hollow structure; a vertical outer toothed ring (23) is rotatably arranged inside the moving platform (21); five limiting plates (25) arranged in a circular array are arranged on the inner side of the outer toothed ring (23); one end of the five limiting plates (25) on a side wall close to the control console (13) and away from the center of the outer toothed ring (23) is rotatably connected to a fixing rod (26); one end of the fixing rod (26) away from the limiting plate (25) is rotatably connected to a side wall of the outer toothed ring (23) close to the control console (13); the arc wall of the five limiting plates (25) close to the center of the outer toothed ring (23) is rotatably connected to a roller (24); one end of the five limiting plates (25) close to the center of the outer toothed ring (23) and away from the roller (24) is rotatably connected to the inner wall of the moving platform (21); The bottom end of one side of the outer toothed ring (23) in one of the fixing mechanisms (20) is meshedly connected with a gear (22), the end of the gear (22) away from the console (13) is fixedly connected with a worm wheel (27), the side of the worm wheel (27) away from the outer toothed ring (23) is meshedly connected with a worm (28), and a longitudinally through-going storage channel is provided at the center of a side wall of the two mobile platforms (21) close to each other.

2. A friction force detection device for a ball screw as claimed in claim 1, characterized in that: Sliding channels 2 are respectively provided on both sides of the bottom ends of the side walls of the two movable platforms 2 (21) close to each other, and sliding channels 3 are respectively provided in the middle of the bottom ends of the side walls of the two movable platforms 2 (21) close to each other. The sliding channels 3 and the two sliding channels 2 are located on the same horizontal line. Guide rods (14) are respectively fixedly connected on both sides of the inside of the sliding channel 1. A bidirectional threaded rod (15) is provided between the two guide rods (14). The two ends of the bidirectional threaded rod (15) are respectively rotatably connected to the inner wall of the sliding channel 1. The two guide rods (14) and the bidirectional threaded rod (15) are both located on the same horizontal line. The guide rod (14) is slidably connected to the sliding channel 2 at the bottom ends of the two movable platforms 2 (21) located on the same side, and the bidirectional threaded rod (15) is rotatably connected to the sliding channel 3 at the bottom ends of the two movable platforms 2 (21).

3. A friction force detection device for a ball screw as claimed in claim 1, characterized in that: A bidirectional telescopic rod (16) is installed on a side wall of the two mobile platforms (21) close to each other. The bidirectional telescopic rod (16) includes two telescopic rods with the same structure and fixed ends fixedly connected to each other. The two ends of the bidirectional telescopic rod (16) respectively penetrate the two mobile platforms (21). The two ends of the bidirectional telescopic rod (16) are respectively fixedly connected to the gears (22) in the two fixed mechanisms (20). A driving source (2) for driving the worm (28) is installed at the bottom of the worm (28). The axes of the inscribed circles of the outer arc walls of the five rollers (24) in the two fixed mechanisms (20) are located on the same straight line.

4. A friction force detection device for a ball screw as claimed in claim 1, characterized in that: A longitudinal slide groove 1 is provided on both sides of one end of the top of the detection platform (10), the length direction of the slide groove 1 is consistent with the length direction of the detection platform (10), one end of the slide groove 1 is close to the top edge of the detection platform (10), and the other end of the slide groove 1 is close to the top center of the control console (13), an electric guide rail is laid in the slide groove 1, and a slider is provided on the electric guide rail, and the tops of the two sliders are fixedly connected to the same moving platform 1 (11), and a longitudinal groove 1 is provided on a side wall of the moving platform 1 (11) close to the control console (13), and a fixing mechanism 2 (30) is installed in the groove 1.

5. A friction force detection device for a ball screw as claimed in claim 4, characterized in that: The fixing mechanism 2 (30) comprises a driving source 1 (31) installed on an end of the inner arc wall of the groove 1 away from the console (13), the output end of the driving source 1 (31) is arranged toward the fixing mechanism 1 (20), the output end of the driving source 1 (31) on a side wall close to the console (13) is fixedly connected to a rotating shaft 1 (33), the outer arc wall of the rotating shaft 1 (33) is provided with three arc grooves distributed in a ring array, the arc grooves are all abutted with electric telescopic rods (34), the fixed ends of the three electric telescopic rods (34) are all fixedly connected to the same fixing ring 1 (32), and the fixing ring 1 (32) is rotatably connected to the inner arc wall of the groove 1.

6. A friction force detection device for a ball screw as claimed in claim 5, characterized in that: A rotating disk (35) is fixedly connected to a side wall of the rotating shaft (33) away from the driving source (31); a coil wire (38) is fixedly connected to a side wall of the rotating disk (35) away from the rotating shaft (33); three limiting blocks (37) distributed in a ring array are abutted on a side wall of the rotating disk (35) away from the rotating shaft (33); a sliding groove (2) is provided on a side wall of the three limiting blocks (37) close to the coil wire (38); the coil wire (38) is slidably connected in the sliding groove (2); a fixing ring (2) (36) is fixedly connected to an edge of a side wall of the rotating disk (35) away from the rotating shaft (33); a penetrating sliding channel (4) is provided on an outer arc wall of the fixing ring (36) at positions corresponding to the three limiting blocks (37); a baffle is fixedly connected to a side wall of the fixing ring (36) away from the rotating disk (35); the three limiting blocks (37) abut against a side wall of the baffle close to the rotating disk (35).

7. A friction force detection device for a ball screw as claimed in claim 6, characterized in that: The rotating disk (35) is provided with a longitudinal storage groove at the center of a side wall close to the fixing mechanism (20), and the baffle is provided with a longitudinally penetrating sliding channel (5) at the center of a side wall close to the fixing mechanism (20), and the sliding channel (5) is arranged coaxially with the storage groove.

8. A friction force detection device for a ball screw as claimed in claim 2, characterized in that: The control console (13) is fixedly connected to the center of the bottom inner wall of the sliding channel, the two guide rods (14) and the bidirectional threaded rod (15) both penetrate the two parallel side walls of the control console (13) in the width direction, a driving source (3) for driving the bidirectional threaded rod (15) to rotate is arranged inside the control console (13), and the same workpiece (12) to be detected is abutted inside the two fixing mechanisms (20).

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