Precision measuring device for small-lead planetary roller screw

Abstract

The utility model discloses a precision measuring device for a small-lead planetary roller screw, which belongs to the technical field of mechanical transmission and comprises a supporting table, a workbench is fixedly mounted on one side of the supporting table, a transmission sliding rail is fixedly mounted at the bottom of the workbench, a sliding block is slidably mounted on the surface of the transmission sliding rail, and the transmission sliding rail is fixedly mounted on the supporting table. A plurality of sliding blocks are fixedly mounted on the outer side of the shell, mounting holes are formed in multiple positions in the sliding blocks, fixing columns are fixedly mounted in the mounting holes, fixing plates are fixedly mounted at the tops of the fixing columns, and fixing half-tooth grooves are formed in the fixing plates. The fixed plate drives the sliding block at the bottom to slide on the surface of the transmission sliding rail in the moving process, and in the moving process of the sliding block, the high-speed grating ruler installed at the top of the workbench can record displacement signals and analyze a speed-error curve and an FFT frequency spectrum in real time, so that the system complexity is reduced, a multi-sensor combination scheme is replaced, and the testing efficiency and reliability are improved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical transmission technology, and in particular relates to a precision measuring device for a small lead planetary roller screw. Background Technology

[0002] Small lead planetary roller screws are high-precision transmission mechanisms widely used in demanding fields such as aerospace and precision machine tools. Their accuracy is measured through comprehensive static and dynamic testing to evaluate core parameters such as lead error, backlash, repeatability, and roller synchronization. With the help of high-resolution sensors and real-time analysis technology, their stability and reliability under complex working conditions are ensured, providing key performance guarantees for ultra-precision motion control.

[0003] Existing technologies disclose several utility model patents in the field of precision measurement devices for small-lead planetary roller screws. Among them, utility model patent CN 116678617 A discloses a precision measurement device for small-lead planetary roller screws, comprising: a bed, a servo motor, a motor bracket, a bearing housing, a four-jaw chuck, a self-aligning roller bearing, a circular grating sensor bracket, a circular grating sensor, a linear guide pair, a guide slider, a connecting plate, a circumferential synchronous fixing device for the screw nut, a synchronous self-aligning support device for the screw nut actuator cylinder, a linear grating sensor, a control cabinet, and an industrial computer. It measures the pitch error, lead error, backlash error, cumulative pitch error, and positioning accuracy of the planetary roller screw. It achieves a closed-loop design for the installation, testing, and adjustment of the precision test for small-lead planetary roller screws. A four-jaw chuck structure was designed to achieve synchronous adjustment of the circumferential fixing of the lead screw nut and the synchronous adjustment of the self-alignment of the lead screw nut actuator cylinder, reducing errors in the installation process of the lead screw being measured, ensuring the coaxiality of the lead screw and nut, and improving the measurement accuracy.

[0004] The aforementioned utility model patent tested data on planetary roller screws in a static state, but lacked data testing on planetary roller screws during short-range operation, thus requiring improvement.

[0005] Based on this, this utility model designs a precision measuring device for small lead planetary roller screws to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to solve the problem that the above-mentioned utility model patent tested the data of planetary roller screws in static state, but lacked the data testing of planetary roller screws in short-stroke operation, and proposes a precision measuring device for small lead planetary roller screws.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A precision measuring device for a small lead planetary roller screw includes a support platform, a worktable fixedly mounted on one side of the support platform, a transmission slide rail fixedly mounted on the bottom of the worktable, a slider slidably mounted on the surface of the transmission slide rail, multiple mounting holes inside the slider, a fixing column fixedly mounted inside the mounting holes, a fixing plate fixedly mounted on the top of the fixing column, a fixing half-tooth groove inside the fixing plate, and a rubber anti-slip coating inside the fixing half-tooth groove.

[0009] As a further description of the above technical solution:

[0010] The fixed half tooth groove is internally fitted with a housing, and retaining rings are fixedly fitted on both sides of the housing. The retaining rings have multiple mounting grooves inside.

[0011] As a further description of the above technical solution:

[0012] The retaining ring has a rotating groove inside, a roller is slidably installed inside the mounting groove, and a lead screw is rotatably installed inside the retaining ring.

[0013] As a further description of the above technical solution:

[0014] A fixed plate is provided on one side of the lead screw, and a rotating bearing is sleeved inside the fixed plate. A fixed groove is opened inside the rotating bearing, and the position of the fixed groove corresponds to the position of one end of the lead screw.

[0015] As a further description of the above technical solution:

[0016] A coupling is rotatably mounted on one end of the lead screw, and a transmission connection groove is provided on one side of the coupling. A servo motor is fixedly mounted on the top of the support platform, and the position of the output end of the servo motor corresponds to the position of the transmission connection groove.

[0017] As a further description of the above technical solution:

[0018] An acceleration sensor is fixedly installed on the top of the support platform, a support frame is fixedly installed on the top of the workbench, a high-speed grating ruler is provided on one side of the support frame, and the reading head of the high-speed grating ruler is installed on one side of the slider. An oscilloscope monitor is fixedly installed on the top of the support frame, and support columns are fixedly installed at multiple locations on the bottom of the support platform.

[0019] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0020] 1. In this utility model, by setting a slider and a high-speed grating ruler, when using the device, first align the output shaft of one end of the servo motor with the transmission connection groove, and then drive the servo motor. The servo motor drives the lead screw to rotate through the set speed, and the lead screw rotates in the meshing of the outer shell, and drives multiple fixed plates fixedly installed on the outside of the outer shell to move. During the movement of the fixed plates, the slider at the bottom slides on the surface of the transmission slide rail. During the movement of the slider, the high-speed grating ruler installed on the top of the worktable can record the displacement signal in real time, analyze the speed-error curve and FFT spectrum, so as to reduce the system complexity, replace the multi-sensor combination scheme, and improve the testing efficiency and reliability.

[0021] 2. In this utility model, by setting a fixed disk and a rotating carrier, and by aligning one end of the lead screw with the position of the fixed groove, when the servo motor drives the lead screw to rotate, the fixed disk drives the rotating balls inside the fixed groove to rotate together through the connection between the lead screw and the rotating carrier, so as to maintain a more stable movement when the lead screw meshes with the outer shell and rotates, and prevent excessive rotation from causing inaccurate experimental data. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a precision measuring device for a small-lead planetary roller screw proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the transmission guide structure of a precision measuring device for a small-lead planetary roller screw proposed in this utility model.

[0024] Figure 3 This is a schematic diagram of the planetary screw structure of the precision measuring device for a small lead planetary roller screw proposed in this utility model.

[0025] Figure 4 This is a cross-sectional view of the planetary ball screw structure of the precision measuring device for a small lead planetary roller screw proposed in this utility model.

[0026] Figure 5 This is a schematic diagram of the retaining ring structure of a precision measuring device for a small-lead planetary roller screw proposed in this utility model.

[0027] Figure 6 This is a cross-sectional view of the fixed disk structure of the precision measuring device for a small lead planetary roller screw proposed in this utility model.

[0028] Figure 7 This is a schematic diagram of the coupling structure of a precision measuring device for a small lead planetary roller screw proposed in this utility model.

[0029] Legend:

[0030] 1. Support platform; 2. Worktable; 3. Transmission slide rail; 4. Slider; 5. Mounting hole; 6. Fixed column; 7. Fixed plate; 8. Fixed half-tooth groove; 9. Housing; 10. Retaining ring; 11. Mounting groove; 12. Rotary groove; 13. Roller; 14. Lead screw; 15. Fixed plate; 16. Rotary bearing; 17. Fixed groove; 18. Coupling; 19. Transmission connection groove; 20. Servo motor; 21. Accelerometer; 22. Support frame; 23. High-speed grating ruler; 24. Oscilloscope monitor; 25. Support column. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see the appendix Figure 1 - Appendix Figure 7 This utility model provides a technical solution: a precision measuring device for a small lead planetary roller screw, including a support platform 1, a worktable 2 fixedly installed on one side of the support platform 1, a transmission slide rail 3 fixedly installed on the bottom of the worktable 2, a slider 4 slidably installed on the surface of the transmission slide rail 3, multiple mounting holes 5 are opened inside the slider 4, a fixing column 6 is fixedly installed inside the mounting holes 5, a fixing plate 7 is fixedly installed on the top of the fixing column 6, a fixing half groove 8 is opened inside the fixing plate 7, and the inside of the fixing half groove 8 is coated with a rubber anti-slip coating.

[0033] The specific implementation method is as follows: a housing 9 is fixedly installed inside the multiple fixed semi-tooth grooves 8, and retaining rings 10 are fixedly installed on both sides of the housing 9. The retaining rings 10 have multiple mounting grooves 11 inside.

[0034] By setting up fixed half-tooth grooves 8 and housing 9, when using this device for testing, first install the fixing plate 7 inside the mounting hole 5, and then place the housing 9 inside the two fixed half-tooth grooves 8 to ensure that the lead screw 14 does not move axially and to ensure that the test can be carried out.

[0035] The specific implementation method is as follows: a rotating groove 12 is provided inside the retaining ring 10, a roller 13 is slidably installed inside the mounting groove 11, and a lead screw 14 is rotatably installed inside the retaining ring 10.

[0036] By setting up retaining ring 10 and roller 13, retaining ring 10 is mainly used for axial positioning and constraining the movement of roller 13 assembly. The axial position of roller 13 assembly is fixed by mechanical limit, preventing axial movement or offset of roller 13 during movement. The roller 13 and lead screw 14 work together to significantly improve the measurement reliability of key parameters such as lead error, backlash, and repeatability accuracy.

[0037] The specific implementation method is as follows: a fixed plate 15 is provided on one side of the lead screw 14, and a rotating bearing 16 is sleeved inside the fixed plate 15. A fixed groove 17 is opened inside the rotating bearing 16, and the position of the fixed groove 17 corresponds to the position of one end of the lead screw 14.

[0038] By setting a fixed plate 15 and a rotating carrier 16, and by aligning one end of the lead screw 14 with the position of the fixed groove 17, when the drive servo motor 20 drives the lead screw 14 to mesh and rotate inside the housing 9, one end of the lead screw 14 drives the ball bearing inside the fixed groove 17 to rotate, so as to ensure that the lead screw 14 moves more smoothly during short-distance testing.

[0039] The specific implementation method is as follows: a coupling 18 is rotatably installed at one end of the lead screw 14, a transmission connection groove 19 is provided on one side of the coupling 18, a servo motor 20 is fixedly installed on the top of the support platform 1, and the position of the output end of the servo motor 20 corresponds to the position of the transmission connection groove 19.

[0040] By setting up coupling 18 and servo motor 20, when using this device for testing, the output shaft at one end of servo motor 20 corresponds to the transmission connection groove 19 at one end of coupling 18. Servo motor 20 can provide precise speed, position and torque output through closed-loop control. Furthermore, coupling 18 installed at one end of servo motor 20 not only transmits torque but is also a key link in eliminating mechanical error chains.

[0041] The specific implementation method is as follows: an acceleration sensor 21 is fixedly installed on the top of the support platform 1, a support frame 22 is fixedly installed on the top of the workbench 2, a high-speed grating ruler 23 is provided on one side of the support frame 22, and the reading head of the high-speed grating ruler 23 is installed on one side of the slider 4, an oscilloscope monitor 24 is fixedly installed on the top of the support frame 22, and multiple support columns 25 are fixedly installed at the bottom of the support platform 1.

[0042] By setting up a high-speed grating ruler 23 and an oscilloscope monitor 24, the high-speed grating ruler 23, installed on one side of the support frame 22, drives the servo motor 20 during testing. The power source drives the slider 4 to slide on the surface of the transmission slide rail 3, and the reading head of the high-speed grating ruler 23 is moved along with it to provide nanometer-level resolution and high-frequency dynamic response. The oscilloscope monitor 24 on the top of the support frame 22 provides real-time dynamic monitoring for the test through multi-channel signal acquisition and analysis.

[0043] Working principle and usage: When using this device to perform precision measurement on planetary roller screws, firstly, the servo motor 20 is installed on the top of the support platform 1. The output shaft of one end of the servo motor 20 is aligned with the transmission connection groove 19 at one end of the coupling 18. Then, the fixing plate 7 is installed on the top of the slider 4, and the housing 9 is installed inside the two fixed half-tooth grooves 8 to fix the housing 9 in place. One end of the screw 14 is connected to the coupling 18 to ensure the power source for the test. The servo motor 20 provides the set power to drive the screw 14 to rotate. The screw 14 meshes with the housing 9 and rotates, causing the slider 4 to slide on the surface of the transmission slide rail 3. During the sliding process, the high-speed grating ruler 23 and the oscilloscope monitor 24 cooperate to acquire and analyze multi-channel signals of the test, performing synchronous acquisition and correlation analysis of multiple parameters such as displacement, vibration, temperature, and load.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision measuring device for a small-lead planetary roller screw, comprising a support platform (1), characterized in that, A workbench (2) is fixedly installed on one side of the support platform (1). A transmission slide rail (3) is fixedly installed on the bottom of the workbench (2). A slider (4) is slidably installed on the surface of the transmission slide rail (3). Multiple mounting holes (5) are provided inside the slider (4). A fixing column (6) is fixedly installed inside the mounting hole (5). A fixing plate (7) is fixedly installed on the top of the fixing column (6). A fixing half groove (8) is provided inside the fixing plate (7), and the inside of the fixing half groove (8) is coated with a rubber anti-slip coating.

2. The precision measuring device for a small-lead planetary roller screw according to claim 1, characterized in that, A housing (9) is fixedly installed inside the fixed half tooth groove (8) in multiple locations. A retaining ring (10) is fixedly installed on both sides of the housing (9). The retaining ring (10) has multiple mounting grooves (11) inside.

3. The precision measuring device for a small-lead planetary roller screw according to claim 2, characterized in that, The retaining ring (10) has a rotating groove (12) inside, a roller (13) is slidably installed inside the mounting groove (11), and a lead screw (14) is rotatably installed inside the retaining ring (10).

4. The precision measuring device for a small lead planetary roller screw according to claim 3, characterized in that, A fixed plate (15) is provided on one side of the lead screw (14). A rotating bearing (16) is sleeved inside the fixed plate (15). A fixed groove (17) is provided inside the rotating bearing (16), and the position of the fixed groove (17) corresponds to the position of one end of the lead screw (14).

5. The precision measuring device for a small lead planetary roller screw according to claim 3, characterized in that, A coupling (18) is rotatably mounted on one end of the lead screw (14). A transmission connection groove (19) is provided on one side of the coupling (18). A servo motor (20) is fixedly mounted on the top of the support platform (1), and the position of the output end of the servo motor (20) corresponds to the position of the transmission connection groove (19).

6. The precision measuring device for a small-lead planetary roller screw according to claim 1, characterized in that, An accelerometer (21) is fixedly installed on the top of the support platform (1), a support frame (22) is fixedly installed on the top of the workbench (2), a high-speed grating ruler (23) is provided on one side of the support frame (22), and the reading head of the high-speed grating ruler (23) is installed on one side of the slider (4). An oscilloscope monitor (24) is fixedly installed on the top of the support frame (22), and support columns (25) are fixedly installed at multiple locations on the bottom of the support platform (1).

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