A ball screw pair life prediction test device

Abstract

The present invention discloses a life prediction test device for a ball screw pair, which belongs to the technical field of ball screw detection. The life prediction test device for a ball screw pair comprises a test bench, a control device is fixedly installed on one side of the top of the test bench; two clamping mechanisms are arranged on the other side of the top of the test bench close to the control device, a first motor is fixedly installed on the other side of the top of the test bench, and a sliding fixable mechanism is installed at the bottom of one of the clamping mechanisms. The present invention can detect not only the thread raceway on the ball screw, but also the balance of the ball screw during operation, and can also detect different thread raceways on ball screws of different specifications by designing the first detection mechanism and the second detection mechanism. The present invention has strong functionality, and the data error is smaller than that of manual naked eye detection, and the later maintenance cost of the equipment is low, which is suitable for most customer needs.

Description

Technical Field

[0001] The invention belongs to the technical field of ball screw detection, and in particular relates to a ball screw pair life prediction test device. Background Art

[0002] A ball screw pair is a common transmission device used to convert rotational motion into linear motion. It consists of a nut, a screw and a ball. Efficient linear transmission is achieved by the reciprocating rolling of the ball between the nut and the screw. The ball screw pair has the advantages of high transmission efficiency, high precision and large load-bearing capacity. It is widely used in CNC machine tools, printing machinery, injection molding machinery and other fields. The ball screw is an important component of the ball screw pair. After the ball screw is processed, it needs to be tested for life by various testing agencies, including fatigue life test, static load life test, dynamic load life test, temperature and vibration test, lubrication status monitoring and track wear test. Through these tests, the working status of the ball screw can be comprehensively evaluated, problems can be discovered in time and measures can be taken to ensure its normal operation and extend its service life.

[0003] When a ball screw is processed, the thread raceway on its surface requires very high precision. If a life test is not performed, after a ball screw with substandard precision has been in operation for a long time, the balls will be subjected to uneven force during the rolling process, causing the ball screw to run unstable, thereby increasing the wear of the thread raceway, and thus shortening the service life of the ball screw. However, ball screws of different diameters have different sizes of thread raceways. The existing test of ball screws usually involves visually observing the thread raceway surface of the ball screw to check for obvious wear, scratches or deformation, but this may not be accurate enough for minor wear. The existing test of ball screws is also performed using a laser measuring instrument. Although ball screws of different diameters can be tested with high measurement accuracy, the subsequent maintenance cost of the equipment is high and cannot meet the needs of most customers. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the disadvantages of the above-mentioned prior art and provide a ball screw pair life prediction test device.

[0005] The technical solution adopted to solve the above technical problem is: a ball screw pair life prediction test device, including a test bench, a control device is fixedly installed on one side of the top of the test bench;

[0006] Two clamping mechanisms are arranged on the other side of the top of the test bench close to the control device, a first motor is fixedly installed on the other side of the top of the test bench, and a sliding and fixing mechanism is installed at the bottom of one of the clamping mechanisms;

[0007] A moving mechanism is fixedly installed at the top rear end of the test bench, a first electric push rod is installed on the moving mechanism, a first detection mechanism is fixedly installed at the bottom end of the piston of the first electric push rod, and a second detection mechanism is fixedly installed at the top front end of the test bench;

[0008] A ball screw is installed between the two clamping mechanisms.

[0009] Further, the clamping mechanism includes an annular seat, which is provided with a plurality of annularly distributed sliding grooves, an annular groove is provided on the inner wall of the annular seat, an annular tooth plate is installed at the center of the annular seat, and a spiral strip is fixedly connected to the other side of the annular tooth plate, a plurality of annularly distributed conical teeth are arranged in the annular seat, and the centers of the plurality of conical teeth are fixedly connected with adjusting pins, an annular fixing plate is fixedly installed on one side of the annular seat by a plurality of bolts, a plurality of sliding grooves are slidably connected with sliding seats, a plurality of arc strips are provided on one side of the plurality of sliding seats, a first chuck is installed on one end of the plurality of sliding seats, a fan-shaped fixing plate is fixedly installed on the other side of the annular seat by a plurality of bolts, the bottom of one of the annular seats is fixedly connected to the first base, and the other side of the fan-shaped fixing plate is fixedly connected to a connecting sleeve.

[0010] Through the above technical scheme, when the ball screw needs to be clamped and tested, the staff inserts one end of the ball screw into the annular seat and rotates the outer end of one of the adjusting pins with a wrench, so that the adjusting pin rotates and drives the conical gear connected to it to rotate, and then drives the annular gear plate to rotate. The rotation of the annular gear plate drives multiple slides to move, and the movement of multiple slides respectively drives the first chucks connected to them to move, so that the multiple first chucks clamp one end of the outer wall of the ball screw, and in the same way, the multiple second chucks in another clamping mechanism clamp the other end of the outer wall of the ball screw, finally achieving the clamping and fixation of the ball screw.

[0011] Furthermore, the annular tooth plate is slidably connected to the annular groove, the annular tooth plate is meshed with multiple conical teeth, one end of multiple adjusting pins is rotatably connected to the annular seat, multiple slides are matched with spiral bars through corresponding arc bars, one end of multiple slides in another clamping mechanism is equipped with a second chuck, the bottom of the first base is fixedly connected to the top of the test bench, and the outer wall of the first motor output shaft is fixedly connected to the inner wall of the connecting sleeve.

[0012] Through the above technical solution, after the ball screw is clamped, the first motor is started, so that the first motor drives the connecting sleeve to rotate through the output shaft, and the connecting sleeve rotates to drive the clamping mechanism connected to it to rotate, thereby driving the ball screw to rotate, so that the subsequent first detection mechanism and the second detection mechanism can perform life detection on it. At the same time, the two clamping mechanisms can clamp ball screws of different diameters, so that the first detection mechanism and the second detection mechanism can realize the detection of different ball screws, and the functionality is strong.

[0013] Furthermore, the sliding and fixable mechanism includes a first slide rail fixedly connected to the top center of the test bench, the top front and rear ends of the first slide rail are provided with mounting holes, the front end of the first slide rail is fixedly connected to a scale, the bottom of the other annular seat is fixedly connected to a second base, the top front and rear ends of the second base are provided with two fixing bolts, multiple fixing nuts are installed on the fixing bolts, and the front end of the second base is fixedly connected to a pointer.

[0014] Through the above technical solution, when clamping ball screws of different lengths, the staff can loosen multiple fixing nuts, and then remove the multiple fixing bolts, and then slide the second base, and then slide the clamping mechanism connected to it, and slide the second base while driving the pointer to move. The length of the ball screw to be tested can be understood according to the scale. When sliding to the specified position, the second base is fixed by multiple fixing bolts and corresponding fixing nuts, thereby realizing the clamping of ball screws of different lengths, and greatly improving the functionality of the equipment.

[0015] Furthermore, the second base is slidably connected to the first slide rail, and the plurality of fixing bolts respectively penetrate corresponding mounting holes and cooperate with fixing nuts.

[0016] With the above technical solution, it is relatively simple for workers to dismantle a plurality of fixing bolts and corresponding fixing nuts each time, and it is also relatively simple to reinstall them.

[0017] Furthermore, the moving mechanism includes a mounting plate fixedly connected to the rear end of the top of the test bench, a second slide rail is fixedly connected to the top of the front end of the mounting plate, two fixed seats are fixedly connected to the top of the test bench and near the front end of the mounting plate, a screw rod and two limit rods are respectively installed between the two fixed seats, a nut seat is installed on the screw rod, and the nut seat is slidably connected to the two limit rods, a second motor is fixedly installed on the top of the test bench and near the other side of one of the fixed seats, one end of the output shaft of the second motor is fixedly connected to one end of the screw rod, a mounting frame is provided at the front end of the mounting plate, a first slider is fixedly connected to the rear end of the mounting frame, the first slider is slidably connected to the second slide rail, and the first electric push rod is fixedly installed on the top of the mounting frame.

[0018] Through the above technical solution, when the second motor starts to work, the second motor drives the screw to rotate through the output shaft, thereby driving the nut seat to move. The movement of the nut seat drives the mounting frame to move, thereby driving the first detection mechanism to move. At the same time, the first slider also moves accordingly, thereby improving the stability of the first detection mechanism when moving. The operation of the first electric push rod can drive the first detection mechanism to move up and down, thereby facilitating the detection of the ball screw.

[0019] Furthermore, the first detection mechanism includes a fixing frame fixedly connected to the bottom end of the piston of the first electric push rod, the bottom of the fixing frame is fixedly connected with a fixing sleeve and a limit end cover respectively, the fixing sleeve is slidably connected with a limit ring, the limit ring is centrally rotatably connected with a connecting shaft, one end of the limit ring is fixedly installed between the fixing sleeve and the first spring, one end of the connecting shaft is fixedly connected with a connecting block, a plurality of connecting rods are fixedly connected to the connecting block, a plurality of connecting blocks are fixedly connected with a fixing shell, one end of the connecting block is fixedly connected with a limit block, and a limit is provided in the limit end cover. A positioning slot is provided, and the other end of the connecting shaft is fixedly connected to an operating head, and one end of each of the connecting rods is respectively fixedly connected to a first detection head, a second detection head, a third detection head and a fourth detection head, and the centers of the first detection head, the second detection head, the third detection head and the fourth detection head are fixedly connected to a plurality of fixed blocks, and movable rods are slidably connected to the plurality of fixed blocks, and one end of each of the movable rods is fixedly connected to an arc plate, and two second springs are respectively installed between each of the fixed blocks and the corresponding arc plates, and a first displacement sensor is fixedly installed on the other end of each of the movable rods.

[0020] Through the above technical solution, when the threaded raceway of the ball screw is detected, the first electric push rod drives multiple arc plates to contact the inner wall of the threaded raceway on the ball screw. When the ball screw rotates, the first detection mechanism moves to the right at the same time, so that the multiple arc plates can be fully in contact with the threaded raceway on the ball screw. When the ball screw is not processed properly, its threaded raceway has a bulge. At this time, the arc plate is in contact, so that the arc plate drives the movable rod to move, so that the first displacement sensor connected to it collects displacement information, which is recorded by the control device, and the two connected second springs play a role. The reset function facilitates the detection of the arc plate and the next contact surface. When it is necessary to detect ball screws of different specifications, multiple arc plates need to be adjusted. At this time, the operating head is pulled outward to drive the limit block to move through the connecting shaft and the connecting block, so that the limit block is separated from the limit end cover. According to the specifications of the ball screw, which arc plate is required for detection, the operating head is rotated to drive the limit block to rotate. After rotating to the required angle, the operating head is pushed again to drive the limit block to be inserted into the limit groove and fit with the limit end cover to complete the adjustment of the first detection mechanism. At the same time, the first spring prevents the limit block from moving, thereby improving a certain stability.

[0021] Furthermore, the multiple connecting rods are distributed in a cross shape, one end of the multiple connecting rods respectively passes through the corresponding fixed shells, the limit blocks are fitted with the limit grooves, and the multiple arc plate structures on the first detection head, the second detection head, the third detection head and the fourth detection head are different in size.

[0022] Through the above technical solution, before adjusting the first detection mechanism, the staff can select the first detection head, the second detection head, the third detection head or the fourth detection head according to the specifications of the ball screw, and then make adjustments. Different detection heads use arc plates with different specifications and strong functionality, which greatly improves the detection efficiency of the ball screw.

[0023] Furthermore, the second detection mechanism includes a third slide rail fixedly connected to the front end of the top of the test bench, the top rear end of the third slide rail is fixedly connected to a rack, a second slide block is slidably connected to the third slide rail, a second electric push rod is fixedly installed on the top of the second slide block, a third motor is fixedly installed on the rear end of the second slide block, a gear is fixedly connected to the outer wall of the output shaft of the third motor, a mounting sleeve is fixedly connected to the rear end of the piston of the second electric push rod, the rear end of the mounting sleeve is fixedly connected to a limiting cylinder, the rear end of the limiting cylinder is fixedly connected to a fixing cover, a baffle is fixedly connected to the center of the limiting cylinder, a limiting disk is slidably connected in the limiting cylinder, a connecting column is fixedly connected to the front end of the limiting disk, a third spring is fixedly installed at the front end of the limiting disk and located on the outside of the connecting column, a touch rod is fixedly connected to the rear end of the limiting disk, and a second displacement sensor is fixedly installed at the front end of the connecting column.

[0024] Through the above technical solution, the second electric push rod is started, so that the second electric push rod pushes the installation sleeve, the limit plate, the connecting column and the touch rod, so that the contact head of the touch rod contacts the outer wall of the ball screw, and when the ball screw rotates and vibrates, it squeezes the touch rod, so that the touch rod squeezes the limit plate, the connecting column and the third spring, so that the second displacement sensor connected thereto collects displacement information and records it through the control device, and at the same time, the third motor is started, so that the third motor drives the gear to move, so that the gear meshes and rolls on the rack, and then drives the second slider to move on the third slide rail, so as to drive the touch rod to move, and realize multi-point detection of the ball screw.

[0025] Furthermore, the gear is meshed with the rack, and the other end of the third spring is fixedly connected to the rear end of the baffle.

[0026] Through the above technical solution, the feeler rod can be driven to move by the cooperation of the gear and the rack, which can not only detect the balance of the ball screw during operation, but also detect ball screws of different lengths.

[0027] The beneficial effects of the present invention are as follows: (1) The present invention can detect not only the threaded raceway on the ball screw, but also the balance of the ball screw during operation by designing the first detection mechanism and the second detection mechanism. At the same time, it can also detect different threaded raceways on ball screws of different specifications. The functionality is strong and the data error is smaller than that of manual visual detection. The later maintenance cost of the equipment is low and it is suitable for most customer needs. (2) The present invention can clamp ball screws of different diameters by designing two clamping mechanisms. The only difference between the two clamping mechanisms is the chuck. When one of the chucks is clamped with the ball screw, the entire clamping mechanism can rotate. When the other chuck is clamped with the ball screw, the ball screw can rotate and the clamping mechanism is stationary, which is convenient for the motor to drive the ball screw to rotate for detection, thereby greatly improving the functionality and detection efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle;

[0029] Figure 2 is a schematic diagram of the structure of the present invention from a second viewing angle;

[0030] Figure 3 It is a front view of the present invention;

[0031] Figure 4 is an exploded view of the clamping mechanism of the present invention from a first perspective;

[0032] Figure 5 is an exploded view of the clamping mechanism of the present invention from a second viewing angle;

[0033] Figure 6 It is a schematic diagram of the structure of the first clamp in the clamping mechanism of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the second clamp in the clamping mechanism of the present invention;

[0035] Figure 8 It is a schematic diagram of the structure of the sliding and fixable mechanism of the present invention;

[0036] Fig. 9 It is a schematic diagram of the structure of the mobile mechanism of the present invention;

[0037] Fig.10 is an exploded view of the first detection mechanism of the present invention;

[0038] Fig.11 It is a schematic diagram of the structure of the limit end cover in the detection mechanism of the present invention;

[0039] Fig.12 is a cross-sectional view of a first detection mechanism of the present invention;

[0040] Fig.13 is a schematic structural diagram of a second detection mechanism of the present invention;

[0041] Fig.14 is an exploded view of the second detection mechanism of the present invention;

[0042] Fig.15 for Figure 8 A partial enlarged view of the middle A;

[0043] Fig.16 for Fig.12 A partial enlarged view of point B in the middle.

[0044] Figure numerals: 1, test bench; 2, control device; 3, clamping mechanism; 301, annular seat; 302, slide groove; 303, annular groove; 304, annular tooth plate; 305, spiral strip; 306, conical teeth; 307, adjustment pin; 308, annular fixing plate; 309, slide seat; 310, arc strip; 311, first chuck; 3112, second chuck; 312, fan-shaped fixing plate; 313, first base; 314, connecting sleeve; 4, first motor; 5, sliding Fixable mechanism; 501, first slide rail; 502, mounting hole; 503, scale; 504, second base; 505, fixing bolt; 506, fixing nut; 507, pointer; 6, moving mechanism; 601, mounting plate; 602, second slide rail; 603, fixing seat; 604, screw rod; 605, limiting rod; 606, nut seat; 607, second motor; 608, mounting frame; 609, first slider; 7, first electric push rod; 8, first detection mechanism; 801, fixed frame; 802, fixed sleeve; 803, limit end cover; 804, limit ring; 805, connecting shaft; 806, first spring; 807, connecting block; 808, connecting rod; 809, fixed shell; 810, limit block; 811, limit groove; 812, operating head; 813, first detection head; 814, second detection head; 815, third detection head; 816, fourth detection head; 817, fixed block; 818, movable rod; 819, curved plate; 8 20. Second spring; 821. First displacement sensor; 9. Second detection mechanism; 901. Third slide rail; 902. Rack; 903. Second slider; 904. Second electric push rod; 905. Third motor; 906. Gear; 907. Mounting sleeve; 908. Limiting cylinder; 909. Fixed cover; 910. Baffle plate; 911. Limiting plate; 912. Connecting column; 913. Third spring; 914. Touch rod; 915. Second displacement sensor; 10. Ball screw. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0046] like Figure 1-16As shown, a ball screw pair life prediction test device of the present embodiment includes a test bench 1, a control device 2 is fixedly installed on one side of the top of the test bench 1, and two clamping mechanisms 3 are arranged on the other side of the top of the test bench 1 close to the control device 2. The clamping mechanism 3 includes an annular seat 301, and a plurality of annularly distributed slide grooves 302 are opened on the annular seat 301, and an annular groove 303 is opened on the inner wall of the annular seat 301. An annular tooth plate 304 is installed at the center of the annular seat 301, and a spiral strip 305 is fixedly connected to the other side of the annular tooth plate 304. A plurality of annularly distributed conical teeth 306 are arranged in the annular seat 301, and the centers of the plurality of conical teeth 306 are fixedly connected with adjusting pins 307, and an annular fixing plate is fixedly installed on one side of the annular seat 301 by a plurality of bolts. 308, multiple slide grooves 302 are slidably connected with slide seats 309, one side of multiple slide seats 309 is provided with multiple arc strips 310, one end of multiple slide seats 309 is installed with a first clamping head 311, the other side of the annular seat 301 is fixedly installed with a fan-shaped fixing plate 312 by multiple bolts, the bottom of one of the annular seats 301 is fixedly connected with a first base 313, and the other side of the fan-shaped fixing plate 312 is fixedly connected with a connecting sleeve 314. When the ball screw 10 needs to be clamped and tested, the staff inserts one end of the ball screw 10 into the annular seat 301, and rotates the outer end of one of the adjusting pins 307 with a wrench, so that the adjusting pin 307 rotates to drive the conical tooth 306 connected thereto to rotate, thereby driving the annular tooth plate 304 to rotate. The annular gear plate 304 rotates to drive multiple slide seats 309 to move, and the multiple slide seats 309 move and respectively drive the first chucks 311 connected thereto to move, so that the multiple first chucks 311 clamp one end of the outer wall of the ball screw 10, and in the same way, the multiple second chucks 3112 in another clamping mechanism 3 clamp the other end of the outer wall of the ball screw 10, and finally the ball screw 10 is clamped and fixed, the annular gear plate 304 is slidably connected to the annular groove 303, the annular gear plate 304 is meshed with multiple conical teeth 306, one end of multiple adjusting pins 307 are rotatably connected to the annular seat 301, and the multiple slide seats 309 cooperate with the spiral strip 305 through the corresponding arc strip 310, and the multiple slide seats in another clamping mechanism 3 A second chuck 3112 is installed at one end of 309, the bottom of the first base 313 is fixedly connected to the top of the test bench 1, and the outer wall of the output shaft of the first motor 4 is fixedly connected to the inner wall of the connecting sleeve 314. After the ball screw 10 is clamped, the first motor 4 is started, so that the first motor 4 drives the connecting sleeve 314 to rotate through the output shaft, so that the connecting sleeve 314 rotates and drives the clamping mechanism 3 connected thereto to rotate, thereby driving the ball screw 10 to rotate, so that the subsequent first detection mechanism 8 and the second detection mechanism 9 can perform life detection on it. At the same time, the two clamping mechanisms 3 can clamp ball screws 10 of different diameters, so that the first detection mechanism 8 and the second detection mechanism 9 can realize the detection of different ball screws 10.Strong functionality.

[0047] like Figure 1-15 As shown, a first motor 4 is fixedly installed on the other side of the top of the test bench 1, a sliding fixing mechanism 5 is installed at the bottom of one of the clamping mechanisms 3, and the sliding fixing mechanism 5 includes a first slide rail 501 fixedly connected to the top center of the test bench 1, and the top front and rear ends of the first slide rail 501 are provided with mounting holes 502, and the front end of the first slide rail 501 is fixedly connected to a scale 503, and the bottom of another annular seat 301 is fixedly connected to a second base 504, and the top front and rear ends of the second base 504 are provided with two fixing bolts 505, and fixing nuts 506 are installed on multiple fixing bolts 505, and a pointer 507 is fixedly connected to the front end of the second base 504. When clamping ball screws 10 of different lengths, the staff can loosen multiple fixing nuts 506, and then tighten multiple fixing nuts. The bolt 505 is disassembled and removed, and then the second base 504 is slid, and then the clamping mechanism 3 connected thereto is slid. While sliding the second base 504, the pointer 507 is driven to move. The length of the ball screw 10 to be detected can be understood according to the scale 503. When sliding to the specified position, the second base 504 is fixed by multiple fixing bolts 505 and corresponding fixing nuts 506, so that ball screws 10 of different lengths can be clamped, which greatly improves the functionality of the equipment. The second base 504 is slidably connected to the first slide rail 501, and multiple fixing bolts 505 respectively penetrate the corresponding mounting holes 502 and cooperate with the fixing nuts 506. It is relatively simple for the staff to disassemble the multiple fixing bolts 505 and the corresponding fixing nuts 506 each time, and it is also relatively simple to reinstall them.

[0048] like Figure 1-9As shown, a moving mechanism 6 is fixedly installed at the top rear end of the test bench 1, and the moving mechanism 6 includes a mounting plate 601 fixedly connected to the top rear end of the test bench 1, and a second slide rail 602 is fixedly connected to the front top of the mounting plate 601. Two fixing seats 603 are fixedly connected to the top of the test bench 1 and close to the front end of the mounting plate 601, and a screw rod 604 and two limit rods 605 are respectively installed between the two fixing seats 603, and a nut seat 606 is installed on the screw rod 604, and the nut seat 606 is slidably connected to the two limit rods 605. A second motor 607 is fixedly installed at the top of the test bench 1 and close to the other side of one of the fixing seats 603, and one end of the output shaft of the second motor 607 is fixedly connected to one end of the screw rod 604. 01 is provided with a mounting frame 608 at the front end, and a first slider 609 is fixedly connected to the rear end of the mounting frame 608. The first slider 609 is slidably connected to the second slide rail 602, and the first electric push rod 7 is fixedly installed on the top of the mounting frame 608. When the second motor 607 starts to work, the second motor 607 drives the lead screw 604 to rotate through the output shaft rotation, and then drives the nut seat 606 to move. The movement of the nut seat 606 drives the mounting frame 608 to move, and then drives the first detection mechanism 8 to move. At the same time, the first slider 609 also moves accordingly, so as to improve the stability of the first detection mechanism 8 when moving. The first electric push rod 7 can drive the first detection mechanism 8 to move up and down, so as to facilitate the detection of the ball screw 10.

[0049] like Figure 1-16As shown, a first electric push rod 7 is installed on the moving mechanism 6, and a first detection mechanism 8 is fixedly installed on the bottom end of the piston of the first electric push rod 7. The first detection mechanism 8 includes a fixing frame 801 fixedly connected to the bottom end of the piston of the first electric push rod 7, and the bottom of the fixing frame 801 is respectively fixedly connected with a fixing sleeve 802 and a limiting end cover 803, a limiting ring 804 is slidably connected in the fixing sleeve 802, and the limiting ring 804 is rotatably connected with a connecting shaft 805 at the center, and a first spring 806 is fixedly installed between one end of the limiting ring 804 and the fixing sleeve 802, and one end of the connecting shaft 805 is fixedly connected with a connecting block 807, and a plurality of connecting rods 808 are fixedly connected to the connecting block 807, and a plurality of connecting blocks 807 are fixedly connected with a fixing shell 809, and the connecting block One end of 807 is fixedly connected to a limiting block 810, a limiting groove 811 is provided in the limiting end cover 803, the other end of the connecting shaft 805 is fixedly connected to an operating head 812, one end of a plurality of connecting rods 808 are respectively fixedly connected to a first detection head 813, a second detection head 814, a third detection head 815 and a fourth detection head 816, the centers of the first detection head 813, the second detection head 814, the third detection head 815 and the fourth detection head 816 are all fixedly connected to a plurality of fixed blocks 817, the plurality of fixed blocks 817 are all slidably connected to movable rods 818, one end of the plurality of movable rods 818 are all fixedly connected to an arc plate 819, two second springs 820 are installed between the plurality of fixed blocks 817 and the corresponding arc plates 819, The other ends of the multiple movable rods 818 are fixedly installed with a first displacement sensor 821. When the threaded raceway of the ball screw 10 is detected, the multiple arc plates 819 are driven by the first electric push rod 7 to contact the inner wall of the threaded raceway on the ball screw 10. When the ball screw 10 rotates, the first detection mechanism 8 moves to the right at the same time, so that the multiple arc plates 819 can fully contact the threaded raceway on the ball screw 10. When the ball screw 10 is not processed properly, its threaded raceway has a bulge. At this time, the arc plate 819 makes contact, so that the arc plate 819 drives the movable rod 818 to move, so that the first displacement sensor 821 connected thereto collects displacement information and records it through the control device 2. The two second springs 820 connected together play a reset role, which is convenient for the arc plate 819 to detect the next contact surface. When it is necessary to detect ball screws 10 of different specifications, it is necessary to adjust multiple arc plates 819. At this time, the operating head 812 is pulled outward, and the limit block 810 is driven to move through the connecting shaft 805 and the connecting block 807, so that the limit block 810 is separated from the limit end cover 803. According to the specifications of the ball screw 10, which arc plate 819 is required for detection, the operating head 812 is rotated, and then the limit block 810 is driven to rotate. After rotating to the required angle, the operating head 812 is pushed again, and then the limit block 810 is driven to insert into the limit groove 811 and fit with the limit end cover 803, thereby completing the adjustment of the first detection mechanism 8.At the same time, the first spring 806 prevents the limit block 810 from moving, improving a certain degree of stability. The multiple connecting rods 808 are distributed in a cross shape, and one end of the multiple connecting rods 808 respectively penetrates the corresponding fixed shell 809. The limit block 810 fits with the limit groove 811. The multiple arc plates 819 on the first detection head 813, the second detection head 814, the third detection head 815 and the fourth detection head 816 have different structures and sizes. Before adjusting the first detection mechanism 8, the staff can select the first detection head 813, the second detection head 814, the third detection head 815 or the fourth detection head 816 according to the size of the ball screw 10, and then adjust it. The specifications of the arc plates 819 used by different detection heads are different, and the functionality is strong, which greatly improves the detection efficiency of the ball screw 10.

[0050] like Figure 1-14As shown, a second detection mechanism 9 is fixedly installed at the top front end of the test bench 1, a ball screw 10 is installed between the two clamping mechanisms 3, the second detection mechanism 9 includes a third slide rail 901 fixedly connected to the top front end of the test bench 1, a rack 902 is fixedly connected to the top rear end of the third slide rail 901, a second slider 903 is slidably connected to the third slide rail 901, a second electric push rod 904 is fixedly installed on the top of the second slider 903, a third motor 905 is fixedly installed at the rear end of the second slider 903, a gear 906 is fixedly connected to the outer wall of the output shaft of the third motor 905, and the second electric push rod 904 is fixedly installed on the top of the second slider 903. The rear end of the push rod 904 piston is fixedly connected with a mounting sleeve 907, the rear end of the mounting sleeve 907 is fixedly connected with a limiting cylinder 908, the rear end of the limiting cylinder 908 is fixedly connected with a fixing cover 909, the center of the limiting cylinder 908 is fixedly connected with a baffle 910, the limiting cylinder 908 is slidably connected with a limiting disk 911, the front end of the limiting disk 911 is fixedly connected with a connecting column 912, the front end of the limiting disk 911 and the outside of the connecting column 912 are fixedly installed with a third spring 913, the rear end of the limiting disk 911 is fixedly connected with a touch rod 914, and the front end of the connecting column 912 is fixedly installed with a second displacement rod 914. The sensor 915 starts the second electric push rod 904, so that the second electric push rod 904 pushes the installation sleeve 907, the limit plate 911, the connecting column 912 and the touch rod 914, so that the contact head of the touch rod 914 contacts the outer wall of the ball screw 10. When the ball screw 10 rotates and vibrates, it squeezes the touch rod 914, so that the touch rod 914 squeezes the limit plate 911, the connecting column 912 and the third spring 913, so that the second displacement sensor 915 connected thereto collects displacement information and records it through the control device 2. At the same time, the third motor 905 is started, so that the third motor 905 drives the The movable gear 906 moves, causing the gear 906 to mesh and roll on the rack 902, thereby driving the second slider 903 to move on the third slide rail 901, thereby driving the touch rod 914 to move, thereby realizing multi-point detection of the ball screw 10. The gear 906 meshes with the rack 902, and the other end of the third spring 913 is fixedly connected to the rear end of the baffle 910. Through the cooperation of the gear 906 and the rack 902, the touch rod 914 can be driven to move, which can not only detect the balance of the ball screw 10 during operation, but also detect ball screws 10 of different lengths.

[0051] The working principle of this embodiment is as follows: the staff inserts one end of the ball screw 10 to be tested into the annular seat 301 in one of the clamping mechanisms 3, and the other end into the annular seat 301 in the other clamping mechanism 3, and rotates the adjusting pin 307 respectively by a wrench, thereby driving the conical teeth 306 connected thereto to rotate, and then driving the annular gear plate 304 to rotate, and the rotation of the annular gear plate 304 drives the multiple slide seats 309 to move, so that the movement of the multiple slide seats 309 respectively drives the first chuck 311 or the second chuck 3112 connected thereto to move, so that the multiple first chucks 311 clamp one end of the outer wall of the ball screw 10, and the multiple second chucks 3112 clamp the other end of the outer wall of the ball screw 10;

[0052] When the threaded raceway of the ball screw 10 is detected, the control device 2 is turned on and the second motor 607 is started at the same time, so that the second motor 607 drives the screw rod 604 to rotate, and then drives the nut seat 606 to move. The movement of the nut seat 606 drives the mounting frame 608 to move, and then drives the first detection mechanism 8 to move. The first detection mechanism 8 is moved to the specified position, and the first electric push rod 7 is started, so that the first electric push rod 7 drives the multiple arc plates 819 to contact the inner wall of the threaded raceway of the ball screw 10. At this time, the first motor 4 is started, so that the first motor 4 drives the connecting sleeve 314 to rotate. The connecting sleeve 314 rotates to drive the clamping mechanism 3 connected thereto to rotate, and then drives the ball screw 10 to rotate. At the same time, the first detection mechanism 8 is driven by the moving mechanism 6 to move to the right, so that the plurality of arc plates 819 can be fully in contact with the threaded raceway on the ball screw 10. When the ball screw 10 is not processed properly, its threaded raceway has a bulge, and at this time, the arc plate 819 makes contact, so that the arc plate 819 drives the movable rod 818 to move, so that the first displacement sensor 821 connected thereto collects displacement information and records it through the control device 2;

[0053] When the balance of the ball screw 10 is detected, the second electric push rod 904 is started, so that the second electric push rod 904 pushes the touch rod 914, so that the contact head of the touch rod 914 contacts the outer wall of the ball screw 10. When the ball screw 10 rotates and vibrates, the touch rod 914 is squeezed, so that the touch rod 914 squeezes the limit plate 911, the connecting column 912 and the third spring 913, so that the second displacement sensor 915 connected thereto collects displacement information and records it through the control device 2. At the same time, the third motor 905 is started, so that the third motor 905 drives the gear 906 to move, so that the gear 906 meshes and rolls on the rack 902, and then drives the touch rod 914 to move, thereby realizing multi-point detection of the ball screw 10, and at the same time, it can also detect ball screws 10 of different lengths;

[0054] After the ball screw 10 is inspected, the two clamping mechanisms 3, the moving mechanism 6, the first electric push rod 7 and the second electric push rod 904 are reset, and the ball screw 10 is removed;

[0055] When it is necessary to detect ball screws 10 of different specifications, the threaded raceways on the ball screws 10 are also different. Before adjusting the first detection mechanism 8, the staff can select the first detection head 813, the second detection head 814, the third detection head 815 or the fourth detection head 816 according to the specifications of the ball screw 10. At this time, pull the operating head 812 outward to drive the limit block 810 to move through the connecting shaft 805 and the connecting block 807, so that the limit block 810 is separated from the limit end cover 803, and then rotate the operating head 812 to drive the limit block 810 to rotate to the required angle, and then push the operating head 812 to drive the limit block 810 to insert into the limit groove 811 and fit with the limit end cover 803 to complete the adjustment of the first detection mechanism 8.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A ball screw pair life prediction test device, comprising a test bench (1), characterized in that: A control device (2) is fixedly mounted on one side of the top of the test bench (1); Two clamping mechanisms (3) are arranged on the other side of the top of the test bench (1) close to the control device (2), a first motor (4) is fixedly mounted on the other side of the top of the test bench (1), and a sliding fixable mechanism (5) is mounted on the bottom of one of the clamping mechanisms (3); A moving mechanism (6) is fixedly mounted at the top rear end of the test bench (1), a first electric push rod (7) is mounted on the moving mechanism (6), a first detection mechanism (8) is fixedly mounted at the bottom end of the piston of the first electric push rod (7), the first detection mechanism (8) comprises a fixing frame (801) fixedly connected to the bottom end of the piston of the first electric push rod (7), a fixing sleeve (802) and a limiting end cover (803) are fixedly connected to the bottom of the fixing frame (801), and the fixing sleeve (802) and the limiting end cover (803) are fixedly connected to the bottom of the fixing frame (801). ) is slidably connected to a limit ring (804) in the inner portion, the limit ring (804) is centrally rotatably connected to a connecting shaft (805), a first spring (806) is fixedly installed between one end of the limit ring (804) and the fixed sleeve (802), one end of the connecting shaft (805) is fixedly connected to a connecting block (807), a plurality of connecting rods (808) are fixedly connected to the connecting block (807), a plurality of connecting blocks (807) are fixedly connected to a fixed shell (809), and the connecting block (807) is fixedly connected to a plurality of connecting rods (808). 07) is fixedly connected to a limiting block (810), a limiting groove (811) is provided in the limiting end cover (803), the other end of the connecting shaft (805) is fixedly connected to an operating head (812), and one end of the plurality of connecting rods (808) is respectively fixedly connected to a first detection head (813), a second detection head (814), a third detection head (815) and a fourth detection head (816), wherein the first detection head (813), the second detection head (814), the third detection head (815) and the fourth detection head (816) are fixedly connected. 15) and the center of the fourth detection head (816) are fixedly connected with a plurality of fixed blocks (817), and a movable rod (818) is slidably connected to the plurality of fixed blocks (817), and one end of the plurality of movable rods (818) is fixedly connected with an arc plate (819), and two second springs (820) are installed between the plurality of fixed blocks (817) and the corresponding arc plates (819), and the other end of the plurality of movable rods (818) is fixedly installed with a first displacement sensor (821); A second detection mechanism (9) is fixedly installed at the top front end of the test bench (1), and the second detection mechanism (9) comprises a third slide rail (901) fixedly connected to the top front end of the test bench (1), a rack (902) is fixedly connected to the top rear end of the third slide rail (901), a second slider (903) is slidably connected to the third slide rail (901), a second electric push rod (904) is fixedly installed at the top of the second slider (903), a third motor (905) is fixedly installed at the rear end of the second slider (903), a gear (906) is fixedly connected to the outer wall of the output shaft of the third motor (905), and a mounting is fixedly connected to the rear end of the piston of the second electric push rod (904). A mounting sleeve (907), wherein the rear end of the mounting sleeve (907) is fixedly connected to a limiting cylinder (908), the rear end of the limiting cylinder (908) is fixedly connected to a fixing cover (909), the center of the limiting cylinder (908) is fixedly connected to a blocking plate (910), the limiting cylinder (908) is slidably connected to a limiting plate (911), the front end of the limiting plate (911) is fixedly connected to a connecting column (912), a third spring (913) is fixedly installed at the front end of the limiting plate (911) and located outside the connecting column (912), the rear end of the limiting plate (911) is fixedly connected to a touch rod (914), and the front end of the connecting column (912) is fixedly installed with a second displacement sensor (915); A ball screw (10) is installed between the two clamping mechanisms (3).

2. A ball screw pair life prediction test device according to claim 1, characterized in that: The clamping mechanism (3) comprises an annular seat (301), a plurality of annularly distributed sliding grooves (302) are provided on the annular seat (301), an annular groove (303) is provided on the inner wall of the annular seat (301), an annular tooth plate (304) is installed at the center of the annular seat (301), a spiral strip (305) is fixedly connected to the other side of the annular tooth plate (304), a plurality of annularly distributed conical teeth (306) are provided in the annular seat (301), the centers of the plurality of conical teeth (306) are all fixedly connected to an adjusting pin (307), and one side of the annular seat (301) is connected to the adjusting pin (307). An annular fixing plate (308) is fixedly installed by multiple bolts, a plurality of sliding grooves (302) are slidably connected to a sliding seat (309), a plurality of arc strips (310) are opened on one side of the plurality of sliding seats (309), a first clamp (311) is installed on one end of the plurality of sliding seats (309), a fan-shaped fixing plate (312) is fixedly installed on the other side of the annular seat (301) by multiple bolts, a first base (313) is fixedly connected to the bottom of another annular seat (301), and a connecting sleeve (314) is fixedly connected to the other side of the fan-shaped fixing plate (312).

3. A ball screw pair life prediction test device according to claim 2, characterized in that: The annular tooth plate (304) is slidably connected to the annular groove (303), the annular tooth plate (304) is meshed with a plurality of conical teeth (306), one end of a plurality of the adjusting pins (307) are rotatably connected to the annular seat (301), a plurality of the slide seats (309) are matched with the spiral strip (305) via corresponding arc strips (310), a second chuck (3112) is installed at one end of a plurality of the slide seats (309) in another clamping mechanism (3), the bottom of the first base (313) is fixedly connected to the top of the test bench (1), and the outer wall of the output shaft of the first motor (4) is fixedly connected to the inner wall of the connecting sleeve (314).

4. A ball screw pair life prediction test device according to claim 2, characterized in that: The sliding fixable mechanism (5) comprises a first slide rail (501) fixedly connected to the top center of the test bench (1), the top front and rear ends of the first slide rail (501) are provided with mounting holes (502), the front end of the first slide rail (501) is fixedly connected to a scale (503), the bottom of the other annular seat (301) is fixedly connected to a second base (504), the top front and rear ends of the second base (504) are provided with two fixing bolts (505), the fixing nuts (506) are installed on the plurality of fixing bolts (505), and the front end of the second base (504) is fixedly connected to a pointer (507).

5. A ball screw pair life prediction test device according to claim 4, characterized in that: The second base (504) is slidably connected to the first slide rail (501), and the plurality of fixing bolts (505) respectively penetrate the corresponding mounting holes (502) and cooperate with the fixing nuts (506).

6. A ball screw pair life prediction test device according to claim 1, characterized in that: The moving mechanism (6) comprises a mounting plate (601) fixedly connected to the rear end of the top of the test bench (1); a second slide rail (602) is fixedly connected to the top of the front end of the mounting plate (601); two fixing seats (603) are fixedly connected to the top of the test bench (1) and close to the front end of the mounting plate (601); a screw rod (604) and two limit rods (605) are respectively installed between the two fixing seats (603); a nut seat (606) is installed on the screw rod (604); the nut seat (606) and the two limit rods (605) slide in a direction opposite to each other. A second motor (607) is fixedly mounted on the top of the test bench (1) and close to the other side of one of the fixed seats (603); one end of the output shaft of the second motor (607) is fixedly connected to one end of the lead screw (604); a mounting frame (608) is provided at the front end of the mounting plate (601); a first slider (609) is fixedly connected to the rear end of the mounting frame (608); the first slider (609) is slidably connected to the second slide rail (602); and the first electric push rod (7) is fixedly mounted on the top of the mounting frame (608).

7. A ball screw pair life prediction test device according to claim 1, characterized in that: The plurality of connecting rods (808) are distributed in a cross shape, one end of the plurality of connecting rods (808) respectively passes through the corresponding fixed shell (809), the limit block (810) fits with the limit groove (811), and the plurality of arc plates (819) on the first detection head (813), the second detection head (814), the third detection head (815) and the fourth detection head (816) have different structures and sizes.

8. A ball screw pair life prediction test device according to claim 1, characterized in that: The gear (906) is meshed with the rack (902), and the other end of the third spring (913) is fixedly connected to the rear end of the baffle (910).

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