CN216815820U

CN216815820U - Ball screw pair friction moment measuring equipment

Info

Publication number: CN216815820U
Application number: CN202220515876.XU
Authority: CN
Inventors: 刘卫坤; 张慧良; 龙凤起
Original assignee: Tianjin Longchuang Hengsheng Industrial Co ltd
Current assignee: Tianjin Longchuang Hengsheng Industrial Co ltd
Priority date: 2022-03-10
Filing date: 2022-03-10
Publication date: 2022-06-24
Anticipated expiration: 2032-03-10

Abstract

The utility model relates to the technical field of ball screw pair friction moment measuring equipment, and provides ball screw pair friction moment measuring equipment, which comprises: the device comprises a rack, a power chuck component, a movable tailstock component, a detection component, a servo follow-up component and a guide rail, wherein the power chuck component is fixedly arranged at one end of the upper side of the rack, the movable tailstock component is slidably arranged at the other end of the upper side of the rack through the guide rail, a screw can be clamped and fixed through the power chuck component and the movable tailstock component, the detection component is arranged between the power chuck component and the movable tailstock component, the lower side of the detection component is slidably arranged on the guide rail, a clamping nut is arranged on the upper side of the detection component, the servo follow-up component is arranged on one side of the guide rail, and the servo follow-up component is connected with one side of the detection component and is used for driving the detection component to slide on the guide rail.

Description

Ball screw pair friction moment measuring equipment

Technical Field

The utility model relates to the technical field of ball screw pair friction moment measuring equipment, in particular to ball screw pair friction moment measuring equipment.

Background

The ball screw consists of a screw rod, a nut and a steel ball, and converts rotary motion into linear motion. In practical production, usually, a pre-pressure is applied to the screw, the nut and the steel ball, and the pre-pressure aims at eliminating axial backlash, reducing elastic displacement caused by axial force and improving the rigidity of the ball screw to avoid step loss. The pre-pressure is increased, the friction torque of the ball screw pair is increased certainly, the temperature rise of the ball screw is caused by the excessive pre-pressure, and the transmission precision of the ball screw is influenced by the high temperature rise, so that the proper pre-pressure is kept between the ball screw and the nut, the reasonable temperature rise is kept, the improvement of the precision of the ball screw is very important, and the monitoring of the pre-pressure is very necessary. The magnitude of the pre-pressure can be reflected by measuring the friction torque of the relevant ball screw pair, whether the pressure of the whole ball screw is reasonable or not can be determined through the magnitude of the friction torque of the ball screw pair and the fluctuation range value, and the precision condition of each circle of ball channel in the full stroke range of the ball screw can be compared.

The friction torque measuring equipment of the existing screw pair is used for measuring the two ends of a ball screw clamped by a fixing clamp in a measuring mode that a person holds a tension meter connecting nut manually and keeps the tension direction vertical to the axial direction of the ball screw, when the ball screw rotates, the nut is connected by the tension meter and then overcomes the friction force of the screw pair to move linearly, and meanwhile, in order to ensure the consistency of the tension direction, the person needs to move correspondingly along with the linear motion of the nut.

However, when the ball screws of different models are replaced, the clamp needs to be replaced, time and labor are wasted, meanwhile, the display numerical value of the tension meter fluctuates in real time, the real-time fluctuation needs to be manually distinguished and recorded, in addition, the position of the nut connected with the tension meter is different along with the replacement of the nut, and the measured numerical value is not accurate.

SUMMERY OF THE UTILITY MODEL

The utility model provides a ball screw pair friction moment measuring device, which aims to solve the problems that when a ball screw of different types is replaced, a clamp needs to be replaced, time and labor are wasted, meanwhile, the display numerical value of a tension meter fluctuates in real time and needs to be distinguished and recorded manually, and in addition, the position of a nut connected with the tension meter is different along with the replacement of the nut, and the measured numerical value is inaccurate.

In order to achieve the purpose, the utility model provides the following technical scheme:

a ball screw pair friction torque measuring apparatus comprising: frame, power chuck subassembly, removal tailstock subassembly, determine module, servo follow-up subassembly and guide rail, power chuck subassembly fixed mounting is in frame upside one end, and the removal tailstock subassembly passes through guide rail slidable mounting at the frame upside other end, and screw rod accessible power chuck subassembly is fixed with removal tailstock subassembly centre gripping, and determine module sets up between power chuck subassembly and removal tailstock subassembly, and determine module downside slidable mounting is on the guide rail, determine module upside centre gripping nut, and servo follow-up subassembly sets up in guide rail one side, and servo follow-up subassembly is connected with determine module one side, is used for driving determine module and slides on the guide rail.

Preferably, the power chuck assembly comprises: square bearing mount pad, main shaft, three-jaw chuck, main shaft servo motor, speed reducer and synchronous belt drive mechanism, square bearing mount pad fixed mounting is in frame upside one end, and the main shaft setting is in square bearing mount pad, and main shaft one end and three-jaw chuck fixed connection, screw rod accessible three-jaw chuck and removal tailstock subassembly centre gripping are fixed, and the main shaft other end passes through synchronous belt drive mechanism and is connected with the speed reducer output, and the speed reducer input is connected with main shaft servo motor output.

Preferably, the moving tailstock assembly comprises: manual tailstock, tailstock mounting panel and tailstock slider, manual tailstock fixed mounting is at tailstock mounting panel upside, and the manual tailstock centre gripping of screw rod accessible three-jaw chuck is fixed, and the determine module setting is between three-jaw chuck and manual tailstock, and tailstock mounting panel downside passes through tailstock slider slidable mounting on the guide rail, and tailstock mounting panel downside is still fixed mounting have with the linear guide stopper that the guide rail cooperation was used.

Preferably, the detection assembly comprises: go up grip block, lower grip block, atress measuring stick, measuring module and module connecting plate, go up grip block and centre gripping nut between the grip block down, the grip block downside passes through the atress measuring stick to be connected with measuring module down, and measuring module installs at module connecting plate upside, and module connecting plate downside passes through slider and guide rail sliding connection, and module connecting plate one side and servo follow-up subassembly fixed connection.

Preferably, the upper clamping block and the lower clamping block are both internally provided with V-shaped grooves.

Preferably, the measurement module comprises: the module comprises a module base, photoelectric sensors, pointers and pressure sensors, wherein the module base is installed on the upper side of a module connecting plate, the pointers are installed on the upper side of the module base, two groups of photoelectric sensors are distributed on the module base and used for sensing the position condition of a stress measuring rod, two groups of pressure sensors are arranged in grooves in the inner side of the module base, and ball contacts of the pressure sensors are in contact with the two sides of the stress measuring rod.

Preferably, the servo follower assembly comprises: the action wheel, the action wheel mount pad, the follower mount pad, driving motor and hold-in range, the both ends of guide rail one side are arranged in to action wheel mount pad and follower mount pad, the action wheel passes through the bearing and installs in the action wheel mount pad, the driving motor output is connected with the action wheel, the follower passes through the bearing and installs in the follower mount pad, action wheel and follower pass through the hold-in range and connect, hold-in range and guide rail parallel arrangement, the hold-in range passes through fixed plate fixed connection with the module connecting plate, be used for driving the determine module and slide on the guide rail.

Preferably, the end part of the guide rail is also provided with a limiting block fixedly installed on the frame.

The utility model has the advantages that: the utility model clamps the ball screw by using the power chuck assembly and the movable tailstock assembly, can effectively deal with the ball screws of different models, does not need to record data manually by using the photoelectric sensor and the pressure sensor, enables the data to be more accurately acquired, can deal with nuts of different models by using the upper clamping block and the lower clamping block with the V-shaped groove, can output force and displacement curves by using the pressure sensor, can reflect the friction torque condition of the whole ball screw by using data, can display the friction torque in 2 directions of forward rotation and return rotation, and is convenient for data storage; and the increase of the servo follow-up assembly ensures that the detection assembly can measure in real time when the nut moves linearly.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is an isometric view of the structure of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is a structural isometric view of the power chuck assembly of the present invention at angle one;

FIG. 4 is a structural isometric view of the power chuck assembly angle two of the present invention;

FIG. 5 is a structural isometric view of the moving tailstock assembly of the present invention;

FIG. 6 is a structural isometric view of the detection assembly of the present invention;

FIG. 7 is a structural isometric view of a measurement module of the present invention;

FIG. 8 is a structural isometric view of the upper and lower clamping blocks of the present invention;

FIG. 9 is a side view of the drive wheel of the servo follower assembly of the present invention;

FIG. 10 is a structural isometric view of the servo follower assembly driven wheel of the present invention;

fig. 11 is a bottom view of the timing belt of the present invention connected to a fixed plate.

Description of reference numerals:

1. a frame; 2. a power chuck assembly; 3. moving the tailstock assembly; 4. a detection component; 5. a servo follower assembly; 6. a guide rail; 7. a screw; 8. a nut; 21. a square bearing mounting seat; 22. a main shaft; 23. a three-jaw chuck; 24. a spindle servo motor; 25. a speed reducer; 26. a synchronous belt transmission mechanism; 31. a manual tailstock; 32. a tailstock mounting plate; 33. a tailstock slide block; 34. a linear guide brake; 41. an upper clamping block; 42. a lower clamping block; 43. a force measuring rod; 44. a measurement module; 45. a module connecting plate; 441. a module base; 442. a photosensor; 443. a pointer; 444. a pressure sensor; 51. a driving wheel; 52. a driving wheel mounting seat; 53. a driven wheel; 54. a driven wheel mounting seat; 55. a drive motor; 56. a synchronous belt; 57. a fixing plate; 61. and a limiting block.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Example (b):

as described with reference to fig. 1 and 2, a friction torque measuring apparatus of a ball screw pair includes: frame 1, power chuck subassembly 2, removal tailstock subassembly 3, determine module 4, servo follow-up subassembly 5 and

guide rail

6, 2 fixed mounting of power chuck subassembly are in 1 upside one end in the frame, and remove tailstock subassembly 3 and pass through 6 slidable mounting in the 1 upside other end in the frame through the guide rail, and 7 accessible power chuck subassemblies of screw rod are fixed with the 3 centre gripping of removal tailstock subassembly, can adapt to the screw rod 7 of different diameters through using power chuck subassembly 2, can adapt to the screw rod 7 of different length through using removal tailstock subassembly 3.

Detection component 4 sets up between power chuck subassembly 2 and

removal tailstock subassembly

3, and 4 downside slidable mounting of detection component are on

guide rail

6, and 4 upside centre gripping nuts 8 of detection component.

Servo follow-up subassembly 5 sets up in guide rail 6 one side, and servo follow-up subassembly 5 is connected with detection component 4 one side for drive detection component 4 slides on guide rail 6.

As explained in connection with fig. 3 and 4, the power chuck assembly 2 includes: the square bearing mounting seat 21 is fixedly mounted at one end of the upper side of the frame 1 through screws, the main shaft 22 is arranged in the square bearing mounting seat 21, one end of the main shaft 22 is fixedly connected with the three-jaw chuck 23, the three-jaw chuck 23 is the prior art and is not described herein again, the screw 7 can be clamped and fixed through the three-jaw chuck 23 and the moving tailstock assembly 3, the other end of the main shaft 22 is connected with the output end of the speed reducer 25 through the synchronous belt transmission mechanism 26, the synchronous belt transmission mechanism 26 is the prior art and is not described herein again, the input end of the speed reducer 25 is connected with the output end of the main shaft servo motor 24, the main shaft servo motor 24 can drive the speed reducer 25 to rotate, the speed reducer 25 drives the main shaft 22 to rotate through the synchronous belt transmission mechanism 26, the main shaft 22 drives the three-jaw chuck 23 to rotate through rotation, thereby rotating the screw 7.

As explained in connection with fig. 5, the moving tailstock assembly 3 includes: manual tailstock 31, tailstock mounting panel 32 and tailstock slider 33, manual tailstock 31 passes through screw fixed mounting at tailstock mounting panel 32 upside, manual tailstock 31 is prior art, no longer give details here, screw 7 accessible three-jaw chuck 23 and manual tailstock 31 centre gripping are fixed, detecting component 4 sets up between three-jaw chuck 23 and manual tailstock 31, tailstock mounting panel 32 downside passes through tailstock slider 33 slidable mounting on guide rail 6, tailstock mounting panel 32 downside is still fixed mounting have with the linear guide stopper 34 of guide rail 6 cooperation use, linear guide stopper 34 is prior art, no longer give details here, tailstock slider 33 can carry out linear motion along guide rail 6 on guide rail 6, a length for being suitable for different screw 7, linear guide stopper 34 is used for fixing tailstock slider 33 final position after adjustment tailstock slider 33 position finishes.

As explained in connection with fig. 6, the detection assembly 4 includes: go up grip block 41, lower grip block 42, atress measuring stick 43, measuring module 44 and module connecting plate 45, go up grip block 41 and down grip block 42 between the centre gripping nut 8, lower grip block 42 downside is connected with measuring module 44 through atress measuring stick 43, and measuring module 44 installs at module connecting plate 45 upside, and module connecting plate 45 downside passes through slider and 6 sliding connection of guide rail, and module connecting plate 45 one side and servo follow-up subassembly 5 fixed connection, measuring module 44 is used for measuring the state of atress measuring stick 43.

As described with reference to fig. 8, V-shaped grooves are formed in the upper clamping block 41 and the lower clamping block 42, and the V-shaped grooves can be compatible with various diameters of the nut 8.

As explained in connection with fig. 7, the measurement module 44 includes: module base 441, photoelectric sensor 442, pointer 443 and pressure sensor 444, module base 441 is installed on the upside of module connecting plate 45, pointer 443 is installed on the upside of module base 441 and is used for debugging the initial position of stress measuring rod 43, pointer 443 should be pointed to the middle of stress measuring rod 43 during initial position measurement, two groups of photoelectric sensors 442 are distributed on module base 441 and are used for sensing the position condition of stress measuring rod 43, two groups of pressure sensors 444 are arranged in the groove on the inner side of module base 441, the ball contacts of pressure sensors 444 are in contact with the two sides of stress measuring rod 43, and the detected stress value is more accurate because pressure sensors 444 are ball contacts.

As described with reference to fig. 1, 9, 10, and 11, the servo follower unit 5 includes: the driving wheel mounting seat 52 and the driven wheel mounting seat 54 are arranged at two ends of one side of the guide rail 6, the driving wheel 51 is mounted in the driving wheel mounting seat 52 through a bearing, the output end of the driving motor 55 is connected with the driving wheel 51, the driven wheel 53 is mounted in the driven wheel mounting seat 54 through a bearing, the driving wheel 51 and the driven wheel 53 are connected through a synchronous belt 56, the synchronous belt 56 is arranged in parallel with the guide rail 6, the synchronous belt 56 is fixedly connected with the module connecting plate 45 through a fixing plate 57 and used for driving the detection assembly 4 to slide on the guide rail, the driving motor 55 drives the driving wheel 51 to rotate, the driving wheel 51 drives the driven wheel 53 to rotate through the synchronous belt 56, the synchronous belt 56 can simultaneously drive the fixing plate 57 to slide on the guide rail 6, and the servo-driven assembly 5 enables the measurement module 44 to actively move, compared with a conventional mechanism layout that the measuring part and the nut move by the same power source, the active moving mode reduces the load of the nut, and the increase of the load of the nut can influence the friction torque so that the friction torque is more accurate. In addition, the equipment is simple and quick to change the model, the testing speed is high, and the testing efficiency is enhanced.

As described with reference to fig. 5, the end of the guide rail 6 is further provided with a stopper 61 fixedly mounted on the frame 1, and the stopper 61 is used to limit the position of the manual tailstock 31 and prevent the manual tailstock 31 from being separated from the guide rail 6 due to misoperation.

The working principle of the utility model is as follows: the front of the device is composed of a square bearing mounting seat 21, a main shaft 22, a three-jaw chuck 23, a main shaft servo motor 24, a speed reducer 25 and a synchronous belt transmission mechanism 26 to form a power chuck assembly 2, the rear of the device is supported by a manual tailstock 31, the three-jaw chuck 23 and the manual tailstock 31 form clamping and supporting of a ball screw, and the opening and closing compatibility of the three-jaw chuck 23 and the manual tailstock 31 can be adjusted in the front and back direction, so that a clamping system can be compatible with ball screws with different diameters and lengths. The main shaft servo motor 24 drives the screw rod 7 to rotate, the left and right stress measuring rods 43 on the nut 8 are in contact with the pressure sensors 444, the rotating direction is limited, so that the nut 8 rotates linearly along with the screw rod 7, meanwhile, the pressure sensors 444 indirectly measure the friction torque between the nut 8 and the screw rod 7, and in order to ensure that the stress measuring rods 43 are in real-time contact with the pressure sensors 444 without increasing the load weight of the nut 8, the servo follow-up assembly 5 is added, so that the measuring module 44 where the pressure sensors 444 are located is matched with the linear motion speed of the nut 8, the stress measuring rods 43 are prevented from being separated from the contact range of the pressure sensors 444, and the photoelectric sensors 442 are added on the front side and the rear side for detection. The clamping block with the V-shaped groove design is used for being compatible with nuts 8 of different specifications, and stress point balance of two sides of each nut 8 is guaranteed. Because the position of the pressure sensor 444 is fixed with the position of the axis of the clamping system, the force arms of the stress measuring rods 43 of the ball screws with different specifications are ensured to be the same, so that the measuring factors are unique, and the measuring precision can be improved. Because the left side and the right side of the measuring module 44 comprise the two pressure sensors 444, the friction torque of the traveling and the returning of the ball screw can be measured, and the measurement is more comprehensive.

The detection method comprises the following steps: the test method may refer to JISB1192 to derive the spindle 22 speed under test in order to derive the nut travel speed in combination with the ball screw pitch of the test, and then set the speed of the servo follower 5 to match the nut 8 travel speed to enable the pressure sensor 444 to measure in real time. During testing, the ball screw is clamped by the three-jaw chuck 23, the other end of the ball screw is supported by the manual tailstock 31, the manual tailstock 31 is locked on the guide rail 6 by the pneumatic control linear guide rail brake 34 after the position is fixed, the nut 8 is moved to the initial testing position, the clamping tool is clamped on the nut 8, the mechanism of the measuring part is moved, the pointer 443 of the measuring module 44 points to the center of the stress measuring rod 43, the moving speed of the nut 8 and the speed of the servo follow-up assembly 5 are matched through microcomputer control, and friction torque measurement of the ball screw pair in the whole moving and return stroke of the nut 8 is completed.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any minor modifications, equivalent replacements and improvements made to the above embodiment according to the technical spirit of the present invention should be included in the protection scope of the technical solution of the present invention.

Claims

1. A ball screw pair friction torque measuring apparatus comprising: frame (1), its characterized in that still includes: a power chuck component (2), a movable tailstock component (3), a detection component (4), a servo follow-up component (5) and a guide rail (6), power chuck subassembly (2) fixed mounting is in frame (1) upside one end, it passes through guide rail (6) slidable mounting at the frame (1) upside other end to remove tailstock subassembly (3), screw rod (7) are fixed through power chuck subassembly (2) and removal tailstock subassembly (3) centre gripping, determine module (4) set up between power chuck subassembly (2) and removal tailstock subassembly (3), determine module (4) downside slidable mounting is on guide rail (6), determine module (4) upside centre gripping nut (8), servo follow-up subassembly (5) set up in guide rail (6) one side, servo follow-up subassembly (5) are connected with determine module (4) one side, be used for driving determine module (4) and slide on guide rail (6).

2. A ball screw pair friction torque measuring apparatus according to claim 1, wherein said power chuck assembly (2) comprises: square bearing mount pad (21), main shaft (22), three-jaw chuck (23), main shaft servo motor (24), speed reducer (25) and synchronous belt drive mechanism (26), square bearing mount pad (21) fixed mounting is in frame (1) upside one end, and main shaft (22) set up in square bearing mount pad (21), main shaft (22) one end and three-jaw chuck (23) fixed connection, and screw rod (7) accessible three-jaw chuck (23) are fixed with removal tailstock subassembly (3) centre gripping, and main shaft (22) other end passes through synchronous belt drive mechanism (26) and is connected with speed reducer (25) output, and speed reducer (25) input is connected with main shaft servo motor (24) output.

3. A ball screw pair friction torque measuring device according to claim 2, characterized in that said moving tailstock assembly (3) comprises: manual tailstock (31), tailstock mounting panel (32) and tailstock slider (33), manual tailstock (31) fixed mounting is in tailstock mounting panel (32) upside, and screw rod (7) accessible three-jaw chuck (23) and manual tailstock (31) centre gripping are fixed, and determine module (4) set up between three-jaw chuck (23) and manual tailstock (31), and tailstock mounting panel (32) downside passes through tailstock slider (33) slidable mounting on guide rail (6), and tailstock mounting panel (32) downside is fixed mounting still have with linear guide stopper (34) that guide rail (6) cooperation was used.

4. A ball screw pair friction torque measuring device according to claim 3, characterized in that the detection assembly (4) comprises: go up grip block (41), lower grip block (42), atress measuring stick (43), measuring module (44) and module connecting plate (45), go up grip block (41) and centre gripping nut (8) down between grip block (42), lower grip block (42) downside is connected with measuring module (44) through atress measuring stick (43), and measuring module (44) are installed in module connecting plate (45) upside, and slider and guide rail (6) sliding connection are passed through to module connecting plate (45) downside, and module connecting plate (45) one side and servo follow-up subassembly (5) fixed connection.

5. A ball screw pair friction torque measuring device according to claim 4, characterized in that V-shaped grooves are provided inside the upper clamping block (41) and the lower clamping block (42).

6. A ball screw pair friction torque measuring apparatus according to claim 4, wherein said measuring module (44) comprises: the module comprises a module base (441), photoelectric sensors (442), pointers (443) and pressure sensors (444), wherein the module base (441) is installed on the upper side of a module connecting plate (45), the pointers (443) are installed on the upper side of the module base (441), two groups of photoelectric sensors (442) are distributed on the module base (441) and used for sensing the position condition of a stress measuring rod (43), two groups of pressure sensors (444) are arranged in a groove in the inner side of the module base (441), and ball contacts of the pressure sensors (444) are in contact with two sides of the stress measuring rod (43).

7. A ball screw pair friction torque measuring device according to claim 4, characterized in that said servo-follower assembly (5) comprises: the device comprises a driving wheel (51), a driving wheel mounting seat (52), a driven wheel (53), a driven wheel mounting seat (54), a driving motor (55) and a synchronous belt (56), wherein the driving wheel mounting seat (52) and the driven wheel mounting seat (54) are arranged at two ends of one side of a guide rail (6), the driving wheel (51) is installed in the driving wheel mounting seat (52) through a bearing, the output end of the driving motor (55) is connected with the driving wheel (51), the driven wheel (53) is installed in the driven wheel mounting seat (54) through a bearing, the driving wheel (51) and the driven wheel (53) are connected through the synchronous belt (56), the synchronous belt (56) is arranged in parallel with the guide rail (6), and the synchronous belt (56) is fixedly connected with a module connecting plate (45) through a fixing plate (57) and used for driving a detection assembly (4) to slide on the guide rail.

8. The device for measuring the friction torque of the ball screw pair according to claim 3, wherein the end of the guide rail (6) is further provided with a limiting block (61) fixedly installed on the frame (1).