A comprehensive performance test platform for a planetary roller screw and a planetary reducer

Abstract

The invention discloses a comprehensive performance test platform for a planetary roller screw and a planetary reducer, which comprises a test bench base. One end of the test bench base is slidably provided with a movable platform and a planetary reducer bracket. A driving motor is fixedly arranged at one end of the movable platform away from the planetary reducer bracket, and a bearing seat is fixedly arranged at the other end of the movable platform. A transmission shaft is arranged on the bearing seat. One end of the transmission shaft close to the driving motor is connected to the output end of a first angle encoder, and the driving shaft of the driving motor is in transmission connection with the input end of the first angle encoder, and a first torque sensor is arranged between the two. The invention can adapt to the determination of the comprehensive performance parameters of planetary roller screws of various sizes and different types of reducers, can save manufacturing costs in actual production, make full use of test modules, and reduce the occupied space of the test bench.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical property testing, and particularly to a comprehensive performance testing platform for a planetary roller screw and a planetary reducer. Background Art

[0002] A planetary roller screw mechanism (PRSM) is a mechanical device that can convert rotational motion into linear motion. It is commonly used in linear servo systems of mechanical equipment in military fields such as aerospace and weaponry, as well as in civilian fields such as numerical control machine tools and medical devices. The input methods of both the reducer and the planetary roller screw are rotational motions. It is an independent component composed of gear transmission, worm transmission, and gear-worm transmission enclosed in a rigid housing, and has characteristics such as a compact structure, a large transmission ratio, and good stability. It is often used as a speed reduction transmission device between the prime mover and the working machine, and has a wide range of applications in engineering fields such as aerospace and engineering machinery.

[0003] With the gradual maturity and industrialization of the technology of planetary roller screws in China, the application fields that use both planetary roller screws and reducers are increasing day by day. However, the equipment for comprehensively testing the performance of both is still blank. Some comprehensive performance test indexes of the two (such as transmission efficiency, rotational speed, etc.) are the same. Designing different comprehensive performance test benches makes the functions of the test benches single, unable to efficiently utilize the corresponding test equipment, and greatly increasing the cost of manufacturing and purchasing the test benches.

[0004] The comprehensive performance test benches developed at the current stage in China can complete the testing of single or multiple performance parameters, but they are all only for the planetary roller screw or the reducer alone. In the case of simultaneously needing to test the comprehensive performance of the planetary roller screw and the reducer, the testing cannot be completed on the same test bench. A mature and professional multi-purpose comprehensive performance test bench is an urgent major requirement in the current relevant industries. Therefore, designing a test bench that can be used for the comprehensive performance testing of both the planetary roller screw and the reducer has important engineering application value and significance. Summary of the Invention

[0005] The purpose of the present invention is to provide a comprehensive performance testing platform for a planetary roller screw and a planetary reducer to solve the technical problems mentioned in the above background art.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An integrated performance test platform for a planetary roller screw and a planetary reducer of the present invention includes a test bench base. One end of the test bench base is slidably provided with a movable platform and a planetary reducer support. A driving motor is fixedly provided at one end of the movable platform away from the planetary reducer support. A bearing seat is fixedly provided at the other end of the movable platform. A transmission shaft is provided on the bearing seat. One end of the transmission shaft close to the driving motor is connected to the output end of a first angle encoder. There is a transmission connection between the driving shaft of the driving motor and the input end of the first angle encoder, and a first torque sensor is provided therebetween. A planetary reducer support flange is provided on one side of the planetary reducer support close to the bearing seat, and a hollow shaft is provided on the other side of the planetary reducer support. An angle encoder base is fixedly provided in the middle of the test bench base. A second angle encoder is provided in the middle of the angle encoder base. Two connecting rods are symmetrically and slidably provided at both ends of the angle encoder base. One end of the two connecting rods close to the planetary reducer support is commonly fixedly connected to a thrust plate, and a thrust sensor is provided on the thrust plate. A servo motor is fixedly provided at the other end of the test bench base, and a conversion mechanism box is fixedly provided between the servo motor and the angle encoder base. An input shaft is rotatably provided at one end of the middle of the conversion mechanism box close to the angle encoder base, and an output shaft is rotatably provided at one end of the middle of the conversion mechanism box close to the servo motor. One end of the input shaft outside the conversion mechanism box is connected to the output end of the second angle encoder, and a second torque sensor is provided therebetween. One end of the output shaft outside the conversion mechanism box is connected to the driving shaft of the servo motor. Two electric cylinders are symmetrically provided on the test bench base between the conversion mechanism box and the angle encoder base. The input ends of the two electric cylinders are respectively connected to the other ends of the two connecting rods. The lead screw shafts of the output ends of the two electric cylinders respectively extend into the conversion mechanism box. A conversion mechanism is provided between the two lead screw shafts and the input shaft and the output shaft.

[0008] Further, two linear guides are symmetrically and fixedly provided on the upper part of the test bench base. Two groups of first sliders respectively slidably engaged with the two linear guides are symmetrically and fixedly provided at the bottom of the movable platform. Two second sliders respectively slidably engaged with the two linear guides are symmetrically and fixedly provided at the bottom of the planetary reducer support.

[0009] Further, a driving motor support for installing the driving motor is fixedly provided at the end of the movable platform, and a driving motor reducer is also provided on the driving motor support. The input end of the driving motor reducer is connected to the driving shaft of the driving motor.

[0010] Further, both ends of the first torque sensor are respectively connected to the output end of the drive motor reducer and the input end of the first angle encoder through two first elastic couplings.

[0011] Further, both ends of the second torque sensor are respectively connected to the input shaft and the output end of the second angle encoder through two second elastic couplings.

[0012] Further, at the other end of the test bench base, a servo motor bracket for mounting the servo motor is fixedly provided, and a servo motor reducer is also provided on the servo motor bracket. The servo motor is connected to the input end of the servo motor reducer.

[0013] Further, the output end of the servo motor reducer is connected to the output shaft through a third elastic coupling.

[0014] Further, the conversion mechanism includes an internal spline shaft sleeve, a spline tooth connection sleeve provided at the end of the input shaft, and a spline tooth gear sleeve rotatably sleeved on the output shaft. One end of the spline tooth gear sleeve is rotatably matched with the side wall of the conversion mechanism housing. At one end of both of the lead screw shafts located inside the conversion mechanism housing, lead screw shaft gears meshing with the gears on the spline tooth gear sleeve are provided. One end of the output shaft located inside the conversion mechanism housing extends outside the spline tooth gear sleeve and is provided with a spline structure at the end. The internal spline shaft sleeve is slidably adapted to the spline tooth connection sleeve, the spline tooth gear sleeve, and the spline structure at the end of the input shaft. A fork for axially moving the internal spline shaft sleeve is provided outside the internal spline shaft sleeve.

[0015] Further, housing bearings for supporting the lead screw shaft, the input shaft, and the output shaft are provided on the side wall of the conversion mechanism housing.

[0016] Further, a grating scale is provided between the two linear guide rails on the test bench base, and a grating scale reading head is provided at the lower part of the planetary reducer bracket.

[0017] Compared with the prior art, the beneficial technical effects of the present invention:

[0018] The present invention can be adapted to the measurement of the comprehensive performance parameters of planetary roller screws of various sizes and different types of reducers. For planetary roller screws of different sizes, only fixtures of corresponding sizes need to be designed to install the planetary roller screws on the test bench. For planetary reducers of different sizes, only flanges and connecting shafts of corresponding sizes need to be designed to install the planetary reducers on the test bench, realizing fast and stable workpiece disassembly and assembly. By installing and adjusting different test components, the present invention can achieve the testing of various performance indicators, and can be comprehensively used for the performance testing of planetary roller screws and planetary reducers, saving manufacturing costs, making full use of the test module, and reducing the occupied space of the test bench in actual production. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the drawings.

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a schematic diagram of the comprehensive performance test of the planetary roller screw of the present invention;

[0022] Figure 3 is a schematic diagram of the screw fixture;

[0023] Figure 4 is a schematic diagram of the comprehensive performance test of the planetary reducer of the present invention;

[0024] Figure 5 is a schematic structural diagram of the conversion mechanism;

[0025] Description of the reference numerals: 1. Servo motor; 2. Servo motor reducer; 3. Servo motor bracket; 4. Elastic coupling; 5. Conversion mechanism housing; 6. Electric cylinder; 7. Torque sensor; 8. Elastic coupling; 9. Angle encoder base; 10. Thrust plate; 11. Thrust sensor; 12. Hollow shaft; 13. Planetary reducer bracket; 14. Bearing seat; 15. First angle encoder; 16. First elastic coupling; 17. First torque sensor; 18. Drive motor bracket; 19. Drive motor reducer; 20. Drive motor; 21. Linear guide; 22. First slider; 23. Test bench base; 24. Planetary reducer bracket flange; 25. Nut; 26. Screw; 27. Screw fixture; 28. Planetary reducer; 29. Spline tooth gear sleeve; 30. Fork; 31. Screw shaft gear; 32. Housing bearing; 33. Conversion mechanism flange; 34. Spline tooth connecting sleeve; 35. Internal spline shaft sleeve; 36. Input shaft; 37. Moving platform; 38. Second slider; 39. Connecting rod; 40. Output shaft; 41. Screw shaft. DETAILED DESCRIPTION OF THE INVENTION

[0026] AsFigure 1 As shown in the figure, a comprehensive performance test platform for a planetary roller screw and a planetary reducer includes a test bench base 23. One end of the test bench base 23 is slidably provided with a movable platform 37 and a planetary reducer bracket 13. Specifically: Two linear guides 21 are symmetrically and fixedly installed on the upper part of the test bench base 23. Two groups of first sliders 22 that are respectively slidably matched with the two linear guides 21 are symmetrically and fixedly installed at the bottom of the movable platform 37. Two second sliders 38 that are respectively slidably matched with the two linear guides 21 are symmetrically and fixedly installed at the bottom of the planetary reducer bracket 13. In addition, a grating scale is installed between the two linear guides, and a grating scale reading head is installed at the lower part of the planetary reducer bracket 13.

[0027] A driving motor 20 is fixedly installed at one end of the movable platform 37 away from the planetary reducer bracket 13. Specifically: A driving motor bracket 18 for installing the driving motor 20 is fixedly installed at the end of the movable platform 37, and a driving motor reducer 19 is also installed on the driving motor bracket 18. The input end of the driving motor reducer 19 is connected to the driving shaft of the driving motor 20.

[0028] A bearing seat 14 is fixedly installed at the other end of the movable platform 37. A transmission shaft is rotatably installed on the bearing seat 14. One end of the transmission shaft close to the driving motor 20 is connected to the output end of a first angle encoder 15. There is a transmission connection between the driving shaft of the driving motor 20 and the input end of the first angle encoder 15, and a first torque sensor 17 is installed between them. In this embodiment, both ends of the first torque sensor 17 are respectively connected to the output end of the driving motor reducer 19 and the input end of the first angle encoder 15 through two first elastic couplings 16.

[0029] A planetary reducer bracket flange 24 is installed on one side of the planetary reducer bracket 13 close to the bearing seat 14, and a hollow shaft 12 is provided on the other side of the planetary reducer bracket 13.

[0030] A second angle encoder base 9 is fixedly installed on the test bench base 23. A second angle encoder is provided in the middle of the angle encoder base 9. Two connecting rods 39 are symmetrically and slidably provided at both ends of the angle encoder base 9. One end of the two connecting rods 39 close to the planetary reducer bracket 13 is fixedly connected to a thrust plate 10 together, and a thrust sensor 11 is installed on the thrust plate 10.

[0031] The other end of the test bench base 23 is fixedly mounted with a servo motor 1, and a conversion mechanism box 5 is fixedly mounted between the servo motor 1 and the angle encoder base 9. In this embodiment, a servo motor bracket 3 for mounting the servo motor 1 is fixedly mounted on the other end of the test bench base 23, and a servo motor reducer 2 is also mounted on the servo motor bracket 3, and the servo motor 1 is connected to the input end of the servo motor reducer 2.

[0032] An input shaft 36 is rotatably mounted at one end of the middle part of the conversion mechanism housing 5 close to the angle encoder base 9, and an output shaft 40 is rotatably mounted at one end of the middle part of the conversion mechanism housing 5 close to the servo motor 1. One end of the input shaft 36 located outside the conversion mechanism housing 5 is transmission-connected to the output end of the second angle encoder, and a second torque sensor 7 is arranged between the two. Specifically, two ends of the second torque sensor 7 are respectively connected to the input shaft 36 and the output end of the second angle encoder 7 through two second elastic couplings 8.

[0033] One end of the output shaft 40 located outside the conversion mechanism housing 5 is connected to the driving shaft of the servo motor 1 . Specifically, the output end of the servo motor reducer 2 is connected to one end of the output shaft 40 located outside the conversion mechanism housing 5 through a third elastic coupling 4 .

[0034] The test bench base 23 is symmetrically fixed with two electric cylinders 6 between the conversion mechanism housing 5 and the angle encoder base 9, and the input ends of the two electric cylinders 6 are respectively connected to the other ends of the two connecting rods 39. The lead screw shafts 41 at the output ends of the two electric cylinders 6 extend to the interior of the conversion mechanism housing 5, and a conversion mechanism is provided between the two lead screw shafts 41 and the input shaft 36 and the output shaft 40.

[0035] like Figure 5 As shown, the conversion mechanism includes an inner spline sleeve 35, a spline tooth connection sleeve 34 installed at the end of the input shaft 36, and a spline tooth gear sleeve 29 rotatably sleeved on the output shaft 40. One end of the spline tooth gear sleeve 29 is rotatably matched with the side wall of the conversion mechanism housing 5. The ends of the two lead screw shafts 41 located inside the conversion mechanism housing 5 are both installed with lead screw shaft gears 31 meshing with the gears on the spline tooth gear sleeve 29. One end of the output shaft 36 located inside the conversion mechanism housing 5 extends to the outside of the spline tooth gear sleeve 29 and a spline structure is provided at the end. The inner spline sleeve 35 is slidably adapted with the spline tooth connection sleeve 34, the spline tooth gear sleeve 29 and the spline structure at the end of the input shaft. The outer side of the inner spline sleeve 35 is provided with a shift fork 30 that drives its axial movement.

[0036] In addition, a plurality of housing bearings 32 for respectively supporting the lead screw shaft, the input shaft and the output shaft are installed on the side wall of the conversion mechanism housing 5, and a conversion structure flange 33 for connecting the corresponding second elastic coupling 8 is installed at the end of the input shaft 36.

[0037] As Figure 2 shown, when the comprehensive performance test of the planetary roller screw is carried out in the present invention, the lead screw 26 and the connecting shaft on the bearing seat 14 are fixedly installed through a lead screw fixture 27 according to the length of the planetary roller screw. The structure diagram of the lead screw fixture is as Figure 3 shown. The nut 25 and the planetary reducer support flange 24 are fixed by flange connection, and it is ensured that the lead screw shaft is coaxial with the drive shaft of the drive motor after installation. The movable platform 37 and the planetary reducer support 13 are moved to a suitable position through the linear guide 21, so that the nut 25 and the planetary reducer support flange 24 are fixed by flange connection. The other side of the planetary reducer support flange 24 is fixedly connected with the thrust plate 10 through the flanges on both sides of the hollow shaft 12, and the thrust sensor 11 is fixedly connected with the thrust plate 10 through the flange. The fork 30 is moved to one side of the output shaft, so that the output shaft is connected with the spline tooth gear sleeve through the internal spline shaft sleeve. The input torque of the drive motor 20 is transmitted to the lead screw fixture 27 through the first elastic coupling 16, and the torque is transmitted to the lead screw 26 through key connection. At the same time, the lead screw fixture 27 and the nut 25 ensure that the lead screw does not have axial displacement. The rotation of the lead screw 26 drives the nut 25 to move linearly along the direction of the linear guide 21, and the output axial force is transmitted to the planetary reducer support flange 24 and then transmitted to the thrust plate 10 through the hollow shaft 12, driving the planetary reducer support 13 and the thrust plate 10 to move linearly along the direction of the linear guide as well. The connecting rods on both sides of the thrust plate 10 input the thrust to the electric cylinder 6. The linear motion is converted into rotational motion by the electric cylinder 6, output through the lead screw shaft of the electric cylinder and drives the lead screw shaft gear 31 to rotate. The spline tooth gear sleeve 29 is driven to rotate through meshing, and the output shaft is driven to rotate through the spline teeth and the internal spline shaft sleeve 35. The output torque is transmitted to the servo motor 1 through the elastic coupling 4. The grating scale reading head moves along the grating of the grating scale to record the motion data of the nut, and the thrust sensor records the thrust data generated by the thrust plate.

[0038] In this embodiment, the drive motor 20 can provide accurate input torque for the planetary roller screw. The first elastic coupling 16 can eliminate the axial clearance to ensure accurate transmission under the premise of installation errors. The first torque sensor 17 can accurately measure the input torque provided by the servo motor. The first angle encoder 15 is used to measure the input angle of the planetary roller screw. The linear guide can ensure the accurate linear motion of the movable platform and the planetary reducer bracket 13. The grating scale can accurately record the linear motion state and the initial and final positions of the planetary reducer bracket 13. The thrust sensor can accurately record the thrust of the thrust plate to reflect the axial force provided by the planetary roller screw.

[0039] As Figure 4 shown, when comprehensively testing the performance of the planetary reducer in the present invention, the planetary reducer 28 is installed on the planetary reducer bracket 13, the thrust plate 10 is removed, the fork 30 is adjusted to the input shaft end so that the input shaft and the output shaft are in transmission connection through the internal spline shaft sleeve 35 and the spline tooth connecting sleeve 35, and the movable platform is moved to a suitable position through the guide rail so that the connecting shaft of the bearing seat 14 can be connected to the planetary reducer 28 through a short shaft. The flange on the output shaft side of the planetary reducer 28 and the input shaft of the second angle encoder can be radially fixed through key connection. The short shaft flange connection and key connection at the input shaft end ensure the transmission of the input torque. The output torque is transmitted to the second angle encoder and the conversion mechanism. At this time, the electric cylinder and the gear structure are not working, and the conversion mechanism only serves as a transmission shaft to transmit the output torque to the servo motor through the third elastic coupling. The second torque sensor can accurately record the output torque of the servo motor to reflect the magnitude of the output torque of the planetary reducer.

[0040] In this embodiment, the drive motor can provide accurate input torque for the planetary reducer. Multiple elastic couplings can eliminate the axial clearance to ensure accurate transmission under the premise of installation errors. The torque sensor can accurately measure the input torque provided by the drive motor and the output torque of the loading motor. The angle encoder is used to measure the input angle of the reducer. The linear guide can ensure the accurate linear motion of the movable platform and the planetary reducer bracket to adjust the positions of the input shaft and the output shaft of the planetary reducer.

[0041] Regarding the above, the present invention does not impose any formal restrictions on the actual design of the test bench. The structure of the conversion mechanism of this test bench consists of Figure 5As shown, by adjusting the layout of the test bench, mechanisms with the same functions can still be used for this test bench, and there is still a large amount of space on the test bench for installing additional test modules. By installing temperature sensors, sound level meters, vibration sensors, etc. on the test bench body, more performance tests can be achieved. Therefore, the above-described embodiments are only descriptions of the preferred embodiments of the present invention and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. An integrated performance test platform for a planetary roller screw and a planetary reducer, characterized in that: It includes a test bench base (23), at one end of which an activity platform (37) and a planetary reducer support (13) are slidably arranged; at one end of the activity platform (37) away from the planetary reducer support (13), a driving motor (20) is fixedly arranged, at the other end of the activity platform (37), a bearing seat (14) is fixedly arranged, a transmission shaft is arranged on the bearing seat (14), one end of the transmission shaft close to the driving motor (20) is connected to the output end of a first angle encoder (15), and there is a transmission connection between the driving shaft of the driving motor (20) and the input end of the first angle encoder (15), and a first torque sensor (17) is arranged therebetween; on one side of the planetary reducer support (13) close to the bearing seat (14), a planetary reducer support flange (24) is arranged, and on the other side of the planetary reducer support (13), a hollow shaft (12) is arranged; in the middle of the test bench base, an angle encoder base (9) is fixedly arranged, a second angle encoder is arranged in the middle of the angle encoder base (9), two connecting rods (39) are symmetrically and slidably arranged at both ends of the angle encoder base (9), and one end of the two connecting rods (39) close to the planetary reducer support (13) is fixedly connected to a thrust plate (10) together, and a thrust sensor (11) is arranged on the thrust plate (10); at the other end of the test bench base, a servo motor (1) is fixedly arranged, and a conversion mechanism box body (5) is fixedly arranged between the servo motor (1) and the angle encoder base (9), an input shaft is rotatably arranged at one end of the middle of the conversion mechanism box body (5) close to the angle encoder base (9), and an output shaft is rotatably arranged at one end of the middle of the conversion mechanism box body (5) close to the servo motor (1); one end of the input shaft outside the conversion mechanism box body (5) is in transmission connection with the output end of the second angle encoder, and a second torque sensor is arranged therebetween, and one end of the output shaft outside the conversion mechanism box body is connected to the driving shaft of the servo motor (1); two electric cylinders (6) are symmetrically arranged between the conversion mechanism box body (5) and the angle encoder base (9) on the test bench base, the input ends of the two electric cylinders (6) are respectively connected to the other ends of the two connecting rods, the lead screw shafts of the output ends of the two electric cylinders (6) respectively extend into the conversion mechanism box body (5), and a conversion mechanism is arranged between the two lead screw shafts and the input shaft and the output shaft.

2. The comprehensive performance test platform for the planetary roller screw and the planetary reducer according to claim 1, characterized in that: Two linear guides (21) are symmetrically and fixedly arranged on the upper part of the test bench base (23), and two groups of first sliders (22) which are respectively in sliding fit with the two linear guides (21) are symmetrically and fixedly arranged at the bottom of the activity platform (37); two second sliders (38) which are respectively in sliding fit with the two linear guides (21) are symmetrically and fixedly arranged at the bottom of the planetary reducer support (13).

3. The comprehensive performance test platform for the planetary roller screw and the planetary reducer according to claim 1, characterized in that: At the end of the movable platform (37), a drive motor bracket (18) for mounting a drive motor is fixedly provided, and a drive motor reducer (19) is also provided on the drive motor bracket (18). The input end of the drive motor reducer (19) is connected to the drive shaft of the drive motor.

4. The comprehensive performance test platform for the planetary roller screw and the planetary reducer according to claim 3, characterized in that: Both ends of the first torque sensor (17) are respectively connected to the output end of the drive motor reducer (19) and the input end of the first angle encoder (15) through two first elastic couplings (16).

5. The comprehensive performance test platform for a planetary roller screw and a planetary reducer according to claim 1, characterized in that: Both ends of the second torque sensor (7) are respectively connected to the input shaft and the output end of the second angle encoder through two second elastic couplings (8).

6. The comprehensive performance test platform for the planetary roller screw and the planetary reducer according to claim 1, characterized in that: At the other end of the test bench base (23), a servo motor bracket (3) for mounting the servo motor (1) is fixedly provided, and a servo motor reducer (2) is also provided on the servo motor bracket (3). The servo motor (1) is connected to the input end of the servo motor reducer (2).

7. The comprehensive performance test platform for a planetary roller screw and a planetary reducer according to claim 6, characterized in that: The output end of the servo motor reducer (2) is connected to the output shaft through a third elastic coupling (4).

8. The comprehensive performance test platform for the planetary roller screw and the planetary reducer according to claim 1, characterized in that: The conversion mechanism includes an internal spline shaft sleeve (35), a spline tooth connecting sleeve (34) provided at the end of the input shaft, and a spline tooth gear sleeve (29) rotatably sleeved on the output shaft; one end of the spline tooth gear sleeve (29) is rotatably matched with the side wall of the conversion mechanism box body. At one end of both of the lead screw shafts located inside the conversion mechanism box body, a lead screw shaft gear meshing with the gear on the spline tooth gear sleeve (29) is provided; one end of the output shaft located inside the conversion mechanism box body extends outside the spline tooth gear sleeve (29) and a spline structure is provided at the end. The internal spline shaft sleeve (35) is slidably adapted to the spline tooth connecting sleeve (34), the spline tooth gear sleeve (29), and the spline structure at the end of the input shaft; a fork (30) for axially moving it is provided outside the internal spline shaft sleeve (35).

9. The comprehensive performance test platform for the planetary roller screw and the planetary reducer according to claim 8, characterized in that: On the side wall of the conversion mechanism box body (5), box body bearings for supporting the lead screw shaft, the input shaft, and the output shaft are provided.

10. The comprehensive performance test platform for the planetary roller screw and the planetary reducer according to claim 2, characterized in that: A grating scale is provided between the two linear guide rails of the test bench base (23), and a grating scale reading head is provided at the lower part of the planetary reducer bracket (13).

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