Lead screw nut load testing device and method of use

Abstract

The application relates to the technical field of lead screws, in particular to a lead screw nut load testing device and a use method, which comprises a first mounting frame, a second mounting frame is arranged at the side end of the first mounting frame, a communication hole is arranged between the first mounting frame and the second mounting frame, a rotating disc is mounted at one end of the first mounting frame facing the second mounting frame, a shaft coupling is mounted in the rotating disc, a plurality of connecting rods are arranged in the second mounting frame, a sliding plate is slidably arranged on the connecting rods, and a transmission device is arranged on the sliding plate; when the load of the lead screw nut is tested, a driving motor is started to drive the connecting rotating disc and the feed screw to rotate, the sliding plate is driven to move towards the rotating disc under the thread connection of the feed screw and the connecting rotating disc, the rotating disc is driven to rotate through a friction block, and then the lead screw is driven to rotate, so that the load applied on the lead screw nut is adjusted to test the rotating condition of the lead screw.

Description

Technical Field

[0001] This application relates to the technical field of lead screw nuts, and in particular to a lead screw nut load testing device and its usage method. Background Technology

[0002] The lead screw and nut load testing device is mainly used to simulate the stress state of the lead screw and nut pair in actual operation. By accurately applying axial load and monitoring key parameters such as deformation and friction torque in real time, it evaluates transmission efficiency, wear resistance, and fatigue life. Its significance lies in providing a reliable design verification and quality control method for the transmission system of automated equipment, ensuring the positioning accuracy, operational stability, and long-term reliability of the equipment under heavy load conditions. It is a core testing tool for optimizing mechanical transmission performance and ensuring the safe operation of equipment.

[0003] For example, a screw nut load testing device with announcement number CN114659772A includes a base plate, a first support plate fixedly installed on the top of the base plate, and a sleeve with its right end communicating with the outside rotatably connected to the first support plate. The inner wall of the sleeve is provided with an array of slots, and a first turntable is provided inside the sleeve. The center of the first turntable is provided with a pressure regulating channel, and a pressure regulating box is fixedly installed in an array inside the first turntable. The above-mentioned prior art has a simple structure and is easy to operate. It can test whether the screw guide rail will jam under different loads. If the screw is jammed, the degree of jamming of the screw guide rail will be further detected, and then the screws that can be repaired will be screened out. This improves the yield rate and reduces the generation of scrap, greatly saves production costs, and is simple, efficient, convenient and quick with strong practicality.

[0004] However, the existing technology still has some shortcomings in the test of screw nut load: 1. The existing technology drives the internal gear ring and the first turntable to rotate by starting the motor, and then drives the sleeve to rotate through the slot and the block, so that the screw can rotate. At this time, the rotation of the screw under different loads can be tested by adjusting the load applied to the nut. However, the screw needs to be fixed by an external device, which may cause inaccurate positioning and result in test error.

[0005] 2. In the prior art, when the lead screw and nut jam, the selection of the first turntable causes the slot and the block to separate. When the block re-enters the slot, it can drive the sleeve to rotate with greater force, thereby continuing to drive the lead screw to rotate. The degree of jamming of the lead screw can be seen directly. However, if the force driving the lead screw to rotate is to be measured, this method has a large error because the lead screw can only be driven to rotate again when the block re-enters the slot.

[0006] Based on this, and given the above viewpoints, there is still room for improvement in the existing technology for testing the load on lead screws and nuts. Summary of the Invention

[0007] To solve the above-mentioned technical problems, this application provides a lead screw nut load testing device and its usage method, adopting the following technical solution:

[0008] In a first aspect, the present invention provides a lead screw nut load testing device, including a first mounting frame, a second mounting frame being provided on the side of the first mounting frame, and a common connecting hole being provided between the first mounting frame and the second mounting frame, a rotating disk being mounted on the end of the first mounting frame facing the second mounting frame, a coupling being mounted in the middle of the rotating disk, a plurality of connecting rods being provided in the second mounting frame, a sliding plate being slidably provided on the connecting rods, and a transmission device being provided on the sliding plate.

[0009] Preferably, the transmission device includes a transmission turntable mounted on a sliding plate, a plurality of spring rods are provided on the end of the transmission turntable facing the rotating disk, friction blocks are provided on the end of the spring rods facing the rotating disk, a drive motor is mounted on the end of the sliding plate away from the rotating disk via a mounting bracket, a transmission gear ring is provided on the transmission turntable, and a transmission gear meshing with the transmission gear ring is mounted on the output shaft of the drive motor.

[0010] Preferably, a feed screw is installed in the middle of the transmission turntable, a connecting turntable is rotatably installed on the side wall of the second mounting frame away from the first mounting frame, and the connecting turntable and the feed screw are connected by threads. A locking pin is connected to the side end of the second mounting frame by threads. A rotating handle is provided at the end of the locking pin away from the connecting turntable. Several fixing grooves are opened at the side end of the connecting turntable, and one end of the locking pin is inserted into the fixing groove.

[0011] Preferably, a linkage device is provided between the rotating disk and the connecting disk. The linkage device includes a connecting gear ring provided on the side end of the rotating disk, a connecting shaft rotatably mounted on the side wall of the second mounting frame, a connecting gear connected to the core of the connecting gear ring mounted on the connecting shaft, a mounting ring slidably provided on the locking pin through a sliding hole, and a mounting sprocket mounted on the mounting ring and the connecting shaft, and the mounting sprocket is connected to the connecting shaft through a transmission chain.

[0012] Preferably, the second mounting frame is provided with a positioning device. The positioning device includes a rotating shaft symmetrically arranged at the bottom of the second mounting frame, and the rotating shaft is provided with symmetrical threads. Two movable frames are symmetrically arranged on the rotating shaft, and the movable frames are connected to the symmetrical threads on the rotating shaft.

[0013] Preferably, the positioning device further includes a fixing component disposed on the upper end of the movable frame. The fixing component includes a first fixing frame disposed on the side of the upper end of the movable frame facing the second mounting frame. A sliding groove is provided on the side of the upper end of the movable frame away from the second mounting frame. A second fixing frame is slidably disposed on the sliding groove. Mounting holes are provided on the first fixing frame and the second fixing frame. Rotating cylinders are symmetrically installed in the mounting holes.

[0014] Preferably, the second fixing frame is provided with a locking component. The locking component includes a connecting strip and a connecting hole disposed on opposite sides of the second fixing frame, and the connecting strip and the connecting hole are staggered. A fixing hole is provided at the lower end of the connecting hole. A locking sleeve is slidably disposed in the fixing hole. A pressing post is slidably disposed in the locking sleeve, and the upper end of the pressing post is arc-shaped. A pressing spring is connected between the pressing post and the locking sleeve.

[0015] Preferably, a control component is provided at the lower end of the second mounting frame. The control component includes a mounting shaft rotatably mounted at the lower end of the second mounting frame. A rotating handle is provided at one end of the mounting shaft. Connecting wheels are respectively provided in the middle of the mounting shaft and the rotating shaft. The connecting wheels are connected by a transmission chain.

[0016] Preferably, a sliding component is provided at the upper end of the second mounting frame. The sliding component includes a mounting sliding hole opened at the upper end of the second mounting frame, a sliding frame is slidably disposed in the mounting sliding hole, and a clamping plate is symmetrically slidably disposed at the lower end of the sliding frame.

[0017] Preferably, the sliding assembly further includes a connecting plate disposed on the upper end of the movable frame, a connecting slide plate slidably disposed on the connecting plate, and the connecting slide plate and the clamping plate are connected by a spring telescopic rod.

[0018] Secondly, the present invention also provides a method for testing the load on a lead screw nut:

[0019] S1: Place the lead screw nut from one end of the second mounting frame onto the movable frame, pass it through the connecting hole, and then fix one end of the lead screw nut through the coupling in the middle of the rotating disk;

[0020] S2: Rotate the handle to make the mounting shaft rotate, the rotating cylinder will lock the lead screw nut, the locking sleeve will prevent the second fixed frame from sliding, and at the same time the two clamping plates will clamp the slide in the lead screw nut.

[0021] S3: Start the drive motor to drive the connecting turntable to rotate, and at the same time drive the feed screw to rotate, so that the sliding plate moves towards the turntable until the friction block drives the turntable to rotate;

[0022] S4: When the turntable rotates, it drives the locking pin to rotate. At this time, the locking pin disengages from the fixing groove on the connecting turntable, allowing the connecting turntable to rotate and stopping the feeding of the sliding plate.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. When testing the load on the lead screw nut, the drive motor is started to make the connecting turntable and the feed screw rotate. Under the threaded connection between the feed screw and the connecting turntable, the sliding plate is driven to move towards the turntable. The friction block drives the turntable to rotate, thereby causing the lead screw to rotate. The load applied to the lead screw nut is adjusted to test the rotation of the lead screw.

[0025] 2. In this invention, after the friction block drives the rotating disk to rotate, the locking pin is disengaged from the fixed groove on the connecting turntable by the drive of the mounting sprocket and the transmission chain, so that the connecting turntable and the feed screw rotate synchronously, stopping the feed of the sliding plate, and maintaining the friction between the friction block and the rotating disk at this time, so as to measure the minimum driving force for driving the lead screw to rotate by the degree of compression of the spring rod.

[0026] 3. When fixing the lead screw nut, the present invention rotates the handle to make the rotating cylinder on the first and second fixing frames clamp the lead screw nut and lock the second fixing frame. At the same time, the two clamping plates clamp the slide in the lead screw nut under the drive of the connecting plate, so that the lead screw nut is positioned and fixed without affecting the rotation of the lead screw nut. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the present invention.

[0028] Figure 2 This is a schematic diagram of the transmission device of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of the feed screw, connecting turntable, locking pin, rotating handle and fixing groove of the present invention.

[0030] Figure 4 This is a schematic diagram of the linkage device of the present invention.

[0031] Figure 5 This is a schematic diagram of the positioning device of the present invention.

[0032] Figure 6 This is a schematic diagram of the structure of the fixing component of the present invention.

[0033] Figure 7 This is a schematic diagram of the locking component of the present invention.

[0034] Figure 8 This is a schematic diagram of the structure of the control component of the present invention.

[0035] Figure 9 This is a schematic diagram of the sliding component of the present invention.

[0036] Explanation of reference numerals in the attached drawings: 11. First mounting frame; 12. Second mounting frame; 13. Communicating hole; 14. Rotating disk; 15. Coupling; 16. Connecting rod; 17. Sliding plate; 2. Transmission device; 21. Transmission turntable; 22. Spring rod; 23. Friction block; 24. Mounting bracket; 25. Drive motor; 26. Transmission gear ring; 27. Transmission gear; 31. Feed screw; 32. Connecting turntable; 33. Locking pin; 34. Rotating handle; 35. Fixing groove; 4. Linkage device; 41. Connecting gear ring; 42. Connecting shaft; 43. Connecting gear; 44. Sliding hole; 45. Mounting ring; 46. Mounting sprocket; 47. 5. Transmission chain; 6. Positioning device; 7. Rotating shaft; 8. Moving frame; 9. Fixing assembly; 10. First fixing frame; 11. Sliding groove; 12. Second fixing frame; 13. Mounting hole; 14. Rotating cylinder; 15. Locking assembly; 16. Connecting bar; 17. Connecting hole; 18. Fixing hole; 19. Locking sleeve; 10. Pressing column; 10. Pressing spring; 11. Control assembly; 12. Mounting shaft; 13. Rotating handle; 14. Connecting wheel; 15. Transmission chain; 16. Sliding assembly; 17. Mounting sliding hole; 18. Sliding frame; 19. Clamping plate; 10. Connecting plate; 11. Connecting slide plate; 12. Spring telescopic rod. Detailed Implementation

[0037] The following is in conjunction with the appendix Figures 1 to 9 This application will be described in further detail.

[0038] This application discloses a lead screw nut load testing device and its usage method, which can ensure that the grinding powder and polishing liquid are fully mixed and stirred, and avoid the grinding powder from clumping in the polishing liquid, thus affecting the mixing effect.

[0039] Example 1:

[0040] refer to Figure 1 A lead screw nut load testing device includes a first mounting frame 11, a second mounting frame 12 disposed on the side of the first mounting frame 11, and a common connecting hole 13 between the first mounting frame 11 and the second mounting frame 12 for fixing the lead screw nut in the first mounting frame 11 and the second mounting frame 12. A rotating disk 14 is mounted on the end of the first mounting frame 11 facing the second mounting frame 12, and the rotating disk 14 drives the lead screw to rotate. A coupling 15 is mounted in the middle of the rotating disk 14 for fixing the lead screw. A plurality of connecting rods 16 are disposed in the second mounting frame 12, and a sliding plate 17 is slidably disposed on the connecting rods 16. By sliding the sliding plate 17, the device on the sliding plate 17 drives the lead screw to rotate through the rotating disk 14 so as to measure its load.

[0041] When testing the load on the lead screw nut, place the lead screw nut in the second mounting frame 12 and pass it through the connecting hole 13. Then fix one end of the lead screw nut to the coupling 15. Then slide the sliding plate 17 so that the device on the sliding plate 17 drives the rotating disk 14 to rotate so as to measure the load on the lead screw nut.

[0042] refer to Figure 2 This is a schematic diagram of the transmission device 2 of the present invention. In order to drive the rotating disk 14 to rotate so as to measure the load when the drive screw rotates, the sliding plate 17 is provided with the transmission device 2. The transmission device 2 includes a transmission turntable 21 mounted on the sliding plate 17. A plurality of spring rods 22 are provided on the end of the transmission turntable 21 facing the rotating disk 14. Friction blocks 23 are provided on the end of the spring rods 22 facing the rotating disk 14. When the transmission turntable 21 rotates, the friction blocks 23 drive the rotating disk 14 to rotate by applying frictional force to the rotating disk 14. When the spring rods 22 are compressed, the frictional force applied by the friction blocks 23 to the rotating disk 14 is changed. A drive motor 25 is mounted on the end of the sliding plate 17 away from the rotating disk 14 through the mounting bracket 24. A transmission gear ring 26 is provided on the transmission turntable 21. A transmission gear 27 that meshes with the transmission gear ring 26 is mounted on the output shaft of the drive motor 25. The drive motor 25 drives the transmission turntable 21 to rotate through the transmission gear ring 26 and the transmission gear 27.

[0043] After fixing the lead screw nut, turn on the drive motor 25. The drive motor 25 drives the drive turntable 21 to rotate through the transmission gear 27 and the transmission gear ring 26. At the same time, slide the sliding plate 17 towards the turntable 14. After the friction block 23 contacts the turntable 14, it compresses the spring rod 22, increasing the friction force of the friction block 23 on the drive turntable 21 until the friction block 23 drives the turntable 14 to rotate under the action of friction. At this time, the load when the drive screw rotates is measured by the friction force that drives the turntable 14 to rotate, that is, the degree of compression of the spring rod 22.

[0044] refer to Figure 3 In order to increase the friction force of the friction block 23 on the rotating disk 14 by sliding the sliding plate 17 towards the rotating disk 14 while driving the transmission turntable 21 to rotate, a feed screw 31 is installed in the middle of the transmission turntable 21. A connecting turntable 32 is rotatably installed on the side wall of the second mounting frame 12 away from the first mounting frame 11, and the connecting turntable 32 is connected to the feed screw 31 by a thread. When the feed screw 31 and the connecting turntable 32 rotate relative to each other, the feed screw 31 drives the sliding plate 17 to move. A locking pin 33 is threadedly connected to the side end of the second mounting frame 12. A rotating handle 34 is provided at the end of the locking pin 33 away from the connecting turntable 32. Several fixing grooves 35 are opened on the side end of the connecting turntable 32, and one end of the locking pin 33 is inserted into the fixing groove 35 to prevent the connecting turntable 32 from rotating with the rotation of the feed screw 31.

[0045] When the transmission turntable 21 rotates, the feed screw 31 rotates. At this time, the locking pin 33 is engaged in the fixing groove 35 to prevent the connecting turntable 32 from rotating. Under the threaded connection between the feed screw 31 and the connecting turntable 32, the sliding plate 17 slides towards the rotating disk 14.

[0046] refer to Figure 4 The diagram shows the structure of the linkage device 4 of the present invention. In order to stop the sliding of the sliding plate 17 when the rotating disk 14 rotates and maintain the friction force of the friction block 23 on the rotating disk 14 at this time, so as to determine the load that makes the lead screw rotate at this time according to the compression degree of the spring rod 22, a linkage device 4 is provided between the rotating disk 14 and the connecting disk 32. The linkage device 4 includes a connecting gear ring 41 provided on the side end of the rotating disk 14, a connecting shaft 42 rotatably mounted on the side wall of the second mounting frame 12, a connecting gear 43 connected to the core of the connecting gear ring 41 mounted on the connecting shaft 42, a mounting ring 45 slidably provided on the locking pin 33 through the sliding hole 44, a mounting sprocket 46 mounted on the mounting ring 45 and the connecting shaft 42, and the mounting sprocket 46 are connected by a transmission chain 47.

[0047] When the rotating disk 14 starts to rotate under the drive of the friction block 23, it drives the connecting shaft 42 to rotate through the connecting gear ring 41 and the connecting gear 43. When the connecting shaft 42 rotates, it drives the locking pin 33 to rotate through the transmission chain 47 and the mounting sprocket 46. Then, under the threaded engagement between the locking pin 33 and the second mounting frame 12, the locking pin 33 is released from the restriction of the fixing groove 35, allowing the connecting disk 32 to rotate freely. At this time, when the feed screw 31 rotates, the connecting disk 32 rotates with the rotation of the screw, stopping the sliding of the sliding plate 17. When it is necessary to lock the rotation of the connecting disk 32 again, the rotating handle 34 is rotated to lock the connecting disk 32.

[0048] Example 2:

[0049] refer to Figure 5 and Figure 6Based on Embodiment 1, the following is a schematic diagram of the positioning device 5 of the present invention. To fix the lead screw nut in the first mounting frame 11 and the second mounting frame 12, a positioning device 5 is provided on the second mounting frame 12. The positioning device 5 includes a rotating shaft 51 symmetrically arranged at the bottom of the second mounting frame 12, with symmetrical threads on the rotating shaft 51. Two movable frames 52 are symmetrically arranged on the rotating shaft 51, and the movable frames 52 are symmetrically threaded to the rotating shaft 51. When the rotating shaft 51 is rotated, the two movable frames 52 slide together to clamp the lead screw. The positioning device 5 also includes the upper end of the movable frame 52. The fixing component 6 includes a first fixing frame 61 with the upper end of the movable frame 52 facing the second mounting frame 12. A sliding groove 62 is opened on the upper end of the movable frame 52 away from the second mounting frame 12. A second fixing frame 63 is slidably arranged on the sliding groove 62 so as to slide the second fixing frame 63 according to the length of the lead screw. The first fixing frame 61 and the second fixing frame 63 are provided with mounting holes 64. Rotating cylinders 65 are symmetrically installed in the mounting holes 64. After the two movable frames 52 slide together, the rotating cylinders 65 on the first fixing frame 61 and the second fixing frame 63 jointly clamp the two ends of the lead screw and fix it.

[0050] When fixing the lead screw, first slide the second fixing frame 63 according to the length of the lead screw so that the first fixing frame 61 and the second fixing frame 63 are located at both ends of the lead screw. Then rotate the rotating shaft 51, and then bring the two moving frames 52 closer to each other so that the rotating cylinders 65 on the first fixing frame 61 and the second fixing frame 63 can jointly clamp the lead screw. While fixing the lead screw, it does not affect the coupling 15 from driving the lead screw to rotate.

[0051] refer to Figure 7 This is a schematic diagram of the locking component 7 of the present invention. After the lead screw is fixed, in order to restrict the sliding of the second fixed frame 63, the second fixed frame 63 is provided with a locking component 7. The locking component 7 includes a connecting strip 71 and a connecting hole 72 disposed on one side of the second fixed frame 63 facing each other. The connecting strip 71 and the connecting hole 72 are staggered to ensure that the second fixed frame 63 can slide together. A fixing hole 73 is opened at the lower end of the connecting hole 72. A locking sleeve 74 is slidably disposed in the fixing hole 73. A pressing post 75 is slidably disposed in the locking sleeve 74. The upper end of the pressing post 75 is set as an arc. A pressing spring 76 is connected between the pressing post 75 and the locking sleeve 74.

[0052] When the second fixing bracket 63 clamps the lead screw, the connecting bar 71 is inserted into the connecting hole 72, pushing the lowering column 75 downward, and then the lowering spring 76 causes the locking sleeve 74 to abut against the sliding groove 62, locking the second fixing bracket 63 by the friction between the locking sleeve 74 and the sliding groove 62.

[0053] refer to Figure 8The diagram shows the structure of the control component 8 of the present invention. In order to drive the rotating shaft 51 to rotate, the control component 8 is provided at the lower end of the second mounting frame 12. The control component 8 includes a mounting shaft 81 rotatably mounted at the lower end of the second mounting frame 12. A rotating handle 82 is provided at one end of the mounting shaft 81. Connecting wheels 83 are respectively provided in the middle of the mounting shaft 81 and the rotating shaft 51. The connecting wheels 83 are connected to each other by a transmission chain 84.

[0054] When fixing the lead screw, the mounting shaft 81 is rotated by turning the handle 82, which in turn causes the rotating shaft 51 to rotate under the drive of the connecting wheel 83 and the transmission chain 84, thereby controlling the sliding of the moving frame 52 to fix the lead screw.

[0055] refer to Figure 9 The diagram shows the structure of the sliding component 9 of the present invention. In order to fix the slide on the lead screw and enable it to move by rotating the lead screw, the upper end of the second mounting frame 12 is provided with the sliding component 9. The sliding component 9 includes a mounting slide hole 91 opened at the upper end of the second mounting frame 12. A sliding frame 92 is slidably disposed in the mounting slide hole 91. A clamping plate 93 is symmetrically slidably disposed at the lower end of the sliding frame 92. The sliding component 9 also includes a connecting plate 94 disposed at the upper end of the moving frame 52. A connecting slide plate 95 is slidably disposed on the connecting plate 94. The connecting slide plate 95 and the clamping plate 93 are connected by a spring telescopic rod 96.

[0056] While controlling the sliding of the movable frame 52 to clamp the lead screw, the clamping plate 93 clamps the fixed slide under the elastic force of the spring telescopic rod 96, so that the slide can slide smoothly when the lead screw rotates.

[0057] Furthermore, the present invention also provides a method for testing the load on a lead screw nut, the method comprising the following steps:

[0058] S1: Place the lead screw nut from one end of the second mounting frame 12 onto the movable frame 52 and pass it through the connecting hole 13. Then, fix one end of the lead screw nut through the coupling 15 in the middle of the rotating disk 14. Then, slide the sliding frame 92 to the slide table in the lead screw nut so that the clamping plate 93 can clamp and fix the slide table.

[0059] S2: Rotating the handle 82 causes the mounting shaft 81 to rotate, which in turn causes the rotating shaft 51 to rotate under the drive of the connecting wheel 83 and the transmission chain 84. Under the threaded connection between the rotating shaft 51 and the moving frame 52, the rotating cylinder 65 on the first fixed frame 61 and the second fixed frame 63 clamps the lead screw nut. At this time, the connecting bar 71 pushes the lower pressure column 75 downward, and the locking sleeve 74 abuts against the sliding groove 62 under the action of the lower pressure spring 76 to prevent the second fixed frame 63 from sliding. At the same time, the two clamping plates 93 clamp the slide in the lead screw nut under the drive of the connecting plate 94, fixing the lead screw nut without affecting its rotation.

[0060] S3: When testing the load on the lead screw nut, start the drive motor 25. Under the meshing of the transmission gear 27 and the transmission gear ring 26, the connecting turntable 32 is driven to rotate, and the feed screw 31 is driven to rotate at the same time. At this time, the locking pin 33 is locked in the fixing groove 35 on the connecting turntable 32 to prevent the connecting turntable 32 from rotating. At this time, the feed screw 31 and the connecting turntable 32 rotate relative to each other, and then the sliding plate 17 is driven to move towards the rotating disk 14 under the threaded connection between the feed screw 31 and the connecting turntable 32.

[0061] S4: When the sliding plate 17 moves toward the rotating disk 14, the friction block 23 on the spring rod 22 abuts against the rotating disk 14, and then compresses the spring rod 22 to increase the friction between the friction block 23 and the rotating disk 14 until the rotating disk 14 is rotated. At this time, the friction between the friction block 23 and the rotating disk 14 is the torque that drives the rotating disk 14, so as to measure the load when the lead screw rotates.

[0062] S5: When the rotating disk 14 rotates, the connecting gear 43 is driven to rotate by the connecting gear ring 41, which in turn drives the connecting shaft 42 to rotate. Then, under the drive of the mounting sprocket 46 and the transmission chain 47, the locking pin 33 rotates, and the locking pin 33 disengages from the fixing groove 35 on the connecting disk 32, allowing the connecting disk 32 to rotate. At this time, when the feed screw 31 rotates, the connecting disk 32 rotates synchronously, stopping the feed of the sliding plate 17 and maintaining the friction between the friction block 23 and the rotating disk 14. When it is necessary to lock the rotation of the connecting disk 32 again, the locking mechanism is engaged by rotating the rotating handle 34.

[0063] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A lead screw nut load testing device, comprising a first mounting frame (11), a second mounting frame (12) is arranged at the side end of the first mounting frame (11), and a communication hole (13) is arranged between the first mounting frame (11) and the second mounting frame (12), characterized in that: A rotating disk (14) is installed on one end of the first mounting frame (11) facing the second mounting frame (12). A coupling (15) is installed in the middle of the rotating disk (14). A plurality of connecting rods (16) are provided in the second mounting frame (12). A sliding plate (17) is slidably provided on the connecting rods (16). A transmission device (2) is provided on the sliding plate (17). The transmission device (2) includes a transmission turntable (21) mounted on a sliding plate (17). A plurality of spring rods (22) are provided on the end of the transmission turntable (21) facing the rotating disk (14). Friction blocks (23) are provided on the end of the spring rods (22) facing the rotating disk (14). A drive motor (25) is mounted on the end of the sliding plate (17) away from the rotating disk (14) via a mounting bracket (24). A transmission gear ring (26) is provided on the transmission turntable (21). A transmission gear (27) that meshes with the transmission gear ring (26) is mounted on the output shaft of the drive motor (25).

2. The ball screw load testing device of claim 1, wherein: A feed screw (31) is installed in the middle of the transmission turntable (21). A connecting turntable (32) is rotatably installed on the side wall of the second mounting frame (12) away from the first mounting frame (11). The connecting turntable (32) and the feed screw (31) are connected by threads. A locking pin (33) is connected to the side end of the second mounting frame (12) by threads. A rotating handle (34) is provided at the end of the locking pin (33) away from the connecting turntable (32). Several fixing grooves (35) are opened on the side end of the connecting turntable (32), and one end of the locking pin (33) is inserted into the fixing groove (35).

3. A lead screw nut load testing device according to claim 2, wherein: A linkage device (4) is provided between the rotating disk (14) and the connecting disk (32). The linkage device (4) includes a connecting gear ring (41) provided on the side end of the rotating disk (14). A connecting shaft (42) is rotatably installed on the side wall of the second mounting frame (12). A connecting gear (43) connected to the core of the connecting gear ring (41) is installed on the connecting shaft (42). An mounting ring (45) is slidably provided on the locking pin (33) through a sliding hole (44). An mounting sprocket (46) is installed on the mounting ring (45) and the connecting shaft (42). The mounting sprocket (46) is connected to the mounting sprocket (46) through a transmission chain (47).

4. The lead screw nut load testing device according to claim 3, characterized in that: The second mounting frame (12) is provided with a positioning device (5). The positioning device (5) includes a rotating shaft (51) symmetrically arranged at the bottom of the second mounting frame (12), and a symmetrical thread on the rotating shaft (51). Two movable frames (52) are symmetrically arranged on the rotating shaft (51), and the movable frames (52) are symmetrically connected to the rotating shaft (51) by the thread.

5. The lead screw nut load testing device according to claim 4, characterized in that: The positioning device (5) further includes a fixing component (6) provided on the upper end of the movable frame (52). The fixing component (6) includes a first fixing frame (61) provided on the side of the upper end of the movable frame (52) facing the second mounting frame (12). A sliding groove (62) is provided on the side of the upper end of the movable frame (52) away from the second mounting frame (12). A second fixing frame (63) is slidably provided on the sliding groove (62). Mounting holes (64) are provided on the first fixing frame (61) and the second fixing frame (63). Rotating cylinders (65) are symmetrically installed in the mounting holes (64).

6. The lead screw nut load testing device according to claim 2, characterized in that: The second fixing frame (63) is provided with a locking component (7). The locking component (7) includes a connecting strip (71) and a connecting hole (72) disposed on one side of the second fixing frame (63) facing each other. The connecting strip (71) and the connecting hole (72) are arranged alternately. A fixing hole (73) is opened at the lower end of the connecting hole (72). A locking sleeve (74) is slidably disposed in the fixing hole (73). A pressing post (75) is slidably disposed in the locking sleeve (74). The upper end of the pressing post (75) is set as an arc. A pressing spring (76) is connected between the pressing post (75) and the locking sleeve (74).

7. The lead screw nut load testing device according to claim 1, characterized in that: The second mounting frame (12) is provided with a control component (8) at its lower end. The control component (8) includes a mounting shaft (81) rotatably mounted at the lower end of the second mounting frame (12). One end of the mounting shaft (81) is provided with a rotating handle (82). The mounting shaft (81) and the rotating shaft (51) are respectively provided with connecting wheels (83). The connecting wheels (83) are connected to each other by a transmission chain (84).

8. The lead screw nut load testing device according to claim 7, characterized in that: The upper end of the second mounting frame (12) is provided with a sliding component (9). The sliding component (9) includes a mounting sliding hole (91) opened at the upper end of the second mounting frame (12). A sliding frame (92) is slidably arranged in the mounting sliding hole (91). A clamping plate (93) is symmetrically slidably arranged at the lower end of the sliding frame (92).

9. A lead screw nut load testing device according to claim 8, characterized in that: The sliding assembly (9) also includes a connecting plate (94) disposed on the upper end of the movable frame (52), and a connecting slide plate (95) is slidably disposed on the connecting plate (94). The connecting slide plate (95) is connected to the clamping plate (93) by a spring telescopic rod (96).

10. A method for testing the load of a lead screw nut, comprising the lead screw nut load testing device according to any one of claims 1-9, characterized in that: S1: Place the lead screw nut from one end of the second mounting frame (12) onto the movable frame (52), pass it through the connecting hole (13), and then fix one end of the lead screw nut by the coupling (15) in the middle of the rotating disk (14); S2: Rotate the handle (82) to make the mounting shaft (81) rotate, the rotating cylinder (65) will lock the screw nut, the locking sleeve (74) will prevent the second fixed frame (63) from sliding, and at the same time the two clamping plates (93) will clamp the slide in the screw nut; S3: Start the drive motor (25) to drive the connecting turntable (32) to rotate, and at the same time drive the feed screw (31) to rotate, so that the sliding plate (17) moves towards the turntable (14) until the friction block (23) drives the turntable (14) to rotate; S4: When the rotating disk (14) rotates, it drives the locking pin (33) to rotate. At this time, the locking pin (33) disengages from the fixing groove (35) on the connecting turntable (32), allowing the connecting turntable (32) to rotate and stopping the feeding of the sliding plate (17).

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