A device for detecting the rotational life of a flexible wheel in a harmonic reducer

Abstract

This invention discloses a device for detecting the rotational life of flexible wheels in a harmonic reducer, relating to the field of harmonic reducer testing devices. It includes a testing platform with a main shaft rotatably mounted laterally on the platform. A drive structure is connected to one end of the main shaft. Multiple fixed frames are spaced apart along the main shaft on the testing platform. A rigid wheel is fixedly connected to one side of each fixed frame, and a flexible wheel meshes within the rigid wheel. A torque output mechanism is connected to the end of each flexible wheel, and a harmonic frame is housed within it. The harmonic frame is rotatably connected to a main rotating rod and a secondary rotating rod located in the same plane. An angle adjustment mechanism is connected to one side of both the main rotating rod and the secondary rotating rod. This invention detects the wear of flexible wheels disassembled from a harmonic reducer, using the same main shaft to drive the harmonic frames within multiple flexible wheels. The device allows for immediate stopping during wear detection, enabling the determination of the rotational life of the harmonic reducer.

Description

Technical Field

[0001] This invention relates to the field of harmonic reducer testing devices, specifically a device for testing the rotational life of a flexible wheel in a harmonic reducer. Background Technology

[0002] Harmonic reducers are high-performance reducers with compact structure, large transmission ratio, small mass, small backlash, and high transmission accuracy. They are widely used in industrial robots, precision optical equipment, medical devices, and aerospace. Currently, the design life of harmonic reducers is generally required to be greater than 8000 hours. Manufacturers need to evaluate or predict the normal service life indicators of their products when producing harmonic reducers.

[0003] Existing technologies often employ accelerated life testing, a highly efficient testing technique. Without altering the product's performance degradation mechanism, it statistically analyzes data obtained by applying loads exceeding normal stress levels to the product. This allows for the evaluation and prediction of both normal service life indicators and accelerated life test-related life indicators. In this method, a harmonic reducer is mounted on an experimental platform, and a set torque is applied to its output shaft. After continuous operation for a period, the reducer is disassembled and installed on a transmission accuracy testing platform. Components such as a coaxially mounted drive motor, torque and speed sensors, and angle sensors are used to test the transmission error of the harmonic reducer. The rotational life of the harmonic reducer can be determined when the transmission error exceeds a predetermined value or when the flexible wheel inside the reducer breaks.

[0004] The flexible wheel inside the harmonic reducer is a major factor affecting its lifespan. The lifespan of the harmonic reducer can be deduced by measuring the wear of the flexible wheel. However, the testing process involves multiple loading and unloading of the harmonic reducer between the experimental and testing platforms, which is cumbersome and involves long intervals, potentially leading to errors in the final lifespan results. Furthermore, to more accurately assess product lifespan indicators, companies often need to test multiple harmonic reducers. Existing experimental and testing platforms typically only allow one harmonic reducer to be loaded at a time, resulting in low testing efficiency. Therefore, existing harmonic reducer lifespan testing devices are not suitable for efficiently and accurately measuring the rotational lifespan of multiple harmonic reducers. Summary of the Invention

[0005] Based on this, the purpose of the present invention is to provide a device for detecting the rotational life of a flexible wheel in a harmonic reducer, so as to solve the technical problem that existing devices for detecting the life of harmonic reducers are not easy to efficiently and accurately measure the rotational life of multiple harmonic reducers.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for detecting the rotational life of a flexible wheel in a harmonic reducer, comprising a testing platform, a main shaft rotatably mounted on the testing platform, and a drive structure connected to one end of the main shaft; multiple fixed frames spaced apart along the direction of the main shaft on the testing platform; a rigid wheel fixedly connected to one side of each fixed frame; a flexible wheel meshing inside the rigid wheel; a torque output mechanism connected to the end of the flexible wheel; and a harmonic frame rotatably connected to the harmonic frame; a main rotating rod and a secondary rotating rod rotatably connected to the harmonic frame in the same plane; rollers provided at the ends of both the main rotating rod and the secondary rotating rod, which are in close contact with the inner wall of the flexible wheel; and an angle adjustment mechanism connected to one side of both the main rotating rod and the secondary rotating rod.

[0007] By adopting the above technical solution, wear detection is performed on the flexible wheels disassembled from the harmonic reducer. The same main shaft drives the harmonic frame inside multiple flexible wheels. During the wear detection process, the machine can be stopped at any time, the harmonic frame inside the flexible wheels can be retracted, and the wear degree of the teeth on the flexible wheels and the inner wall of the flexible wheels can be detected. By comparing the wear degree of the flexible wheels with the wear degree of the flexible wheels below the threshold transmission accuracy state, the rotational life of the harmonic reducer can be obtained.

[0008] The present invention is further configured such that the testing platform has a second support on one side of the fixed frame, the top end of the second support is connected to a cylindrical structure coaxial with the main shaft, the outer wall of the top end of the second support is threaded and a rotating ring is threadedly connected thereto, the outer wall of one end of the rotating ring is tightly fitted with a second bearing, the outer wall of the second bearing is tightly fitted with a collar, the outer wall of the collar is rotatably connected to multiple connecting rods, and the other ends of the multiple connecting rods are respectively rotatably connected to the main rotating rod and the auxiliary rotating rod.

[0009] By adopting the above technical solution, after rotating the rotating ring, the collar can move along the axis of the main shaft, and then the connecting rod can be used to make the main rotating rod and the auxiliary rotating rod rotate. After rotating, the main rotating rod and the auxiliary rotating rod will not contact the inner wall of the flexible wheel, which makes it easier for the staff to measure the wear of the teeth on the flexible wheel and the wear of the inner wall of the flexible wheel.

[0010] The present invention is further configured such that the rotation shafts of the main rotating rod and the auxiliary rotating rod are located on the side close to the connecting rod, and each of the main rotating rods or the auxiliary rotating rods is connected to a connecting rod and is in the same plane as the connecting rod.

[0011] By adopting the above technical solution, when the main rotating rod and the auxiliary rotating rod rotate and remain in the same plane, the main rotating rod and the auxiliary rotating rod are restricted by the harmonic frame and cannot continue to rotate, thereby making it easier to position the main rotating rod and the auxiliary rotating rod.

[0012] The invention is further configured such that a hanging plate is provided on the side of the main rotating rod away from the rotating shaft, and a collar is provided on the side of the auxiliary rotating rod away from the rotating shaft. An elastic band passes through the collars of all the auxiliary rotating rods. When the main rotating rod and the auxiliary rotating rod are in the same plane, the elastic band is hung on the hanging plate and is in a taut state.

[0013] By adopting the above technical solution, the elastic force of the elastic band is used to pull the main rotating rod and the auxiliary rotating rod on the side away from the second support, thereby further preventing the main rotating rod and the auxiliary rotating rod from bending when the main shaft rotates.

[0014] The present invention is further configured such that an inner fixing plate is provided on the inner side of the flexible wheel and an outer fixing plate is provided on the outer side, the inner fixing plate and the outer fixing plate are connected to each other, a first bearing is sleeved inside the outer fixing plate, and the top end of a first bracket is sleeved on the inner wall of the first bearing, the top end of the first bracket having a cylindrical structure coaxial with the main shaft.

[0015] By adopting the above technical solution, the torque is output by using the outer fixed plate that is fixedly connected to the flexible wheel.

[0016] The invention is further configured such that the outer wall of the outer fixing plate is connected to a first transmission belt, the other end of the first transmission belt is connected to a swing arm, the swing arm is rotatably connected to the top of the column, the column is fixed inside the testing table, and a counterweight is provided at the end of the swing arm.

[0017] By adopting the above technical solution and adjusting the weight of the counterweight at the end of the swing arm, the output load of the flexible wheel can be easily adjusted, thereby extending the service life of the harmonic reducer under various working conditions.

[0018] The present invention is further configured such that multiple telescopic rods are fixedly connected below the second bracket inside the testing platform, the bottom end of the telescopic rods is connected to a lifting platform, a counterweight plate is rotatably connected between the lifting platforms, the rotating shaft of the counterweight plate is connected to a second transmission belt, a collar is provided on one side of the second bracket, and the top end of the second transmission belt is fitted onto the hanging ring.

[0019] By adopting the above technical solution, the rotation of the main shaft will not be affected when the second transmission belt is sleeved on the collar.

[0020] The present invention is further configured such that the telescopic rod includes a fixed part and a telescopic part, wherein the fixed part is fixedly connected to the inner wall of the testing platform, while the telescopic part is slidably connected inside the fixed part, and the second transmission belt is in a taut state due to the gravity of the telescopic part of the telescopic rod and its underlying structure.

[0021] By adopting the above technical solution, the second transmission belt can make close contact with the main shaft when it is sleeved on the main shaft, and it is not easy for slippage to occur.

[0022] The present invention is further configured such that two mutually symmetrical adjustment blocks are slidably disposed on the counterweight disk along the radial direction.

[0023] By adopting the above technical solution, the position of the sliding control adjustment block on the counterweight plate can be conveniently adjusted to change the torque of the counterweight plate, which can better replace the torque input by the main shaft to the flexible wheel. After the rotational life test of any flexible wheel is completed, the main shaft can output an equivalent torque to the counterweight plate, thus eliminating the need to adjust the output power of the main shaft and saving the debugging time of the testing equipment.

[0024] In summary, the present invention has the following main beneficial effects:

[0025] This invention performs wear detection on flexible wheels disassembled from a harmonic reducer. It utilizes a single main shaft to drive the harmonic frames within multiple flexible wheels. During the wear detection process, the machine can be stopped at any time, the harmonic frames within the flexible wheels can be retracted, and the wear degree of the upper teeth and inner wall of the flexible wheels can be detected. By comparing the wear degree of the flexible wheels with the wear degree of a state below the threshold transmission accuracy, the service life of each flexible wheel can be easily determined. Simultaneous life detection of multiple flexible wheels ensures that each flexible wheel is relatively independent, thus enabling a more accurate determination of its service life and ultimately the rotational life of the harmonic reducer.

[0026] This invention provides a replacement structure with the same input torque as the harmonic frame on one side of each flexible wheel detection position. After one flexible wheel is detected, the harmonic frame is removed from the flexible wheel, and then the transmission belt of the replacement structure is hung on the main shaft to replace the original input torque to the flexible wheel. This eliminates the need to adjust the output torque of the main shaft every time a flexible wheel is removed, saving the debugging time of the detection device and improving the detection accuracy of the remaining service life of the flexible wheels.

[0027] This invention provides an elastic band on the side of the main rotating rod and the auxiliary rotating rod away from the rotating shaft. When the main rotating rod and the auxiliary rotating rod rotate to their positions and are on the same plane, the elastic band is taut on one side of the main rotating rod. This further prevents the main rotating rod and the auxiliary rotating rod from leaving the same plane during the rotation of the harmonic frame, allowing the harmonic frame to rotate stably within the flexible wheel. Attached Figure Description

[0028] Figure 1 This is a perspective view of the present invention;

[0029] Figure 2 For the present invention Figure 1 Enlarged view of A in the middle;

[0030] Figure 3 This is a perspective view of the present invention;

[0031] Figure 4 For the present invention Figure 2 Enlarged view of B in the middle;

[0032] Figure 5 This is a perspective view of the internal structure of the testing station of the present invention;

[0033] Figure 6 For the present invention Figure 5 Enlarged view of C;

[0034] Figure 7 This is a perspective view of the internal structure of the detection stage from another angle.

[0035] Figure 8 This is an exploded view of the single flexible wheel detection structure of the present invention;

[0036] Figure 9 For the present invention Figure 8 Enlarged view of D;

[0037] Figure 10 This is an exploded view of the single flexible wheel detection structure from another perspective of the present invention;

[0038] Figure 11 For the present invention Figure 10 Enlarged view of E in the middle.

[0039] In the diagram: 1. Testing platform; 2. Main shaft; 3. Flexible wheel; 4. Fixed frame; 5. Rigid wheel; 6. Inner fixed plate; 7. Outer fixed plate; 8. First bracket; 9. Second bracket; 10. First bearing; 11. Second bearing; 12. Rotating ring; 13. Hanging ring; 14. Collar; 15. Harmonic frame; 16. Main rotating rod; 17. Secondary rotating rod; 18. Connecting rod; 19. Collar; 20. Hanging plate; 21. Elastic belt; 22. First transmission belt; 23. Second transmission belt; 24. Column; 25. Swing arm; 26. Telescopic rod; 27. Lifting platform; 28. Counterweight plate; 29. ​​Adjusting block; 30. Side sliding door; 31. Storage box; 32. Slide rail; 33. Coupling; 34. Tailstock. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0041] The embodiments of the present invention will now be described.

[0042] A device for detecting the rotational life of a flexible wheel in a harmonic reducer, such as... Figure 1-11 As shown, the system includes a testing platform 1, on which a main shaft 2 is laterally rotatably mounted. A drive structure is connected to one end of the main shaft 2. Specifically, one end of the main shaft 2 is rotatably connected to a tailstock 34, which is fixedly connected to one end of the testing platform 1. The other end of the main shaft 2 is connected to a coupling 33, and the other end of the coupling 33 is connected to a drive motor located inside the testing platform 1. The axes of the cylindrical structures at the top of the first support 8 and the second support 9, the rigid wheel 5, and the harmonic frame 15 all coincide with the axis of the main shaft 2. The main shaft 2 has a keyway at the position corresponding to the harmonic frame 15, and the inner wall of the harmonic frame 15 has a groove at the position corresponding to the keyway. Using metal keys inserted in the keyway and groove, the torque of the main shaft 2 can be effectively transmitted to the harmonic frame 15, preventing slippage of the harmonic frame 15. The inner walls of the cylindrical structures at the ends do not contact the main shaft 2. Multiple fixed frames 4 are spaced apart on the detection table 1 along the direction of the main shaft 2. A rigid wheel 5 is fixedly connected to one side of the fixed frame 4. A flexible wheel 3 meshes inside the rigid wheel 5. A torque output mechanism is connected to the end of the flexible wheel 3, and a harmonic frame 15 is set inside it. The harmonic frame 15 is rotatably connected to a main rotating rod 16 and an auxiliary rotating rod 17 in the same plane. Rollers are set at the ends of the main rotating rod 16 and the auxiliary rotating rod 17 and are in close contact with the inner wall of the flexible wheel 3. An angle adjustment mechanism is connected to one side of the main rotating rod 16 and the auxiliary rotating rod 17. Specifically, the length of the main rotating rod 16 is greater than the length of the auxiliary rotating rod 17. The main rotating rod 16 has two rods on opposite sides along the long axis of the flexible wheel 3, while the auxiliary rotating rod 17 is set on both sides of the main rotating rod 16, for a total of four rods.

[0043] Please see Figure 1 and Figure 5 The testing platform 1 has a box-like structure, with the columns 24, swing arms 25, telescopic rods 26, and other structures all housed within it. The testing platform 1 has slide rails 32 at both the bottom and top of its front side, with a side sliding door 30 slidably connected within each slide rail 32. The side sliding door 30 can be rolled up in a storage box 31, which is fixedly located on one side of the testing platform 1. When adjusting the weight of the counterweight on the swing arm 25 or the position of the adjusting block 29 on the counterweight plate 28, simply open the side sliding door 30. During the testing process, the side sliding door 30 must be closed to prevent external factors from interfering with the normal rotation of the swing arm 25 and the counterweight plate 28. The side sliding door 30 serves to protect the internal components of the testing platform 1.

[0044] Please see Figure 4 and Figure 9The testing platform 1 has a second support 9 on one side of the fixed frame 4. The top of the second support 9 is connected to a cylindrical structure coaxial with the main shaft 2. The cylindrical structure at the top of the second support 9 faces the flexible wheel 3. The outer wall of the top of the second support 9 is threaded and connected to a rotating ring 12. A second bearing 11 is tightly fitted on the outer wall of one end of the rotating ring 12. A collar 14 is tightly fitted on the outer wall of the second bearing 11. Multiple connecting rods 18 are rotatably connected to the outer wall of the collar 14. The other ends of the multiple connecting rods 18 are rotatably connected to the main rotating rod 16 and the auxiliary rotating rod 17, respectively. When the harmonic frame 15 rotates normally, the collar 14 and the harmonic frame... 15 rotates synchronously, while the rotating ring 12 does not rotate. When the rotating ring 12 is manually rotated, the thread inside the rotating ring 12 engages with the thread on the outer wall of the second bracket 9, enabling the rotating ring 12 to move along the axis of the main shaft 2 on the cylindrical structure of the second bracket 9. After rotating the rotating ring 12, the collar 14 can move along the axis of the main shaft 2, thereby using the connecting rod 18 to rotate the main rotating rod 16 and the auxiliary rotating rod 17. After rotation, the main rotating rod 16 and the auxiliary rotating rod 17 will not contact the inner wall of the flexible wheel 3, thus facilitating the operator to measure the wear of the teeth on the flexible wheel 3 and the inner wall of the flexible wheel 3.

[0045] Please see Figure 9 and Figure 11 The rotating shafts of the main rotating rod 16 and the auxiliary rotating rod 17 are located near the connecting rod 18. Each main rotating rod 16 or auxiliary rotating rod 17 is connected to a connecting rod 18 and is in the same plane as the connecting rod 18. When the main rotating rod 16 and the auxiliary rotating rod 17 rotate and remain in the same plane, the main rotating rod 16 and the auxiliary rotating rod 17 are restricted by the harmonic frame 15 and cannot continue to rotate. Specifically, the plane of one end of the main rotating rod 16 and the auxiliary rotating rod 17 is in contact with the plane of the harmonic frame 15, thereby facilitating the positioning of the main rotating rod 16 and the auxiliary rotating rod 17. A hanging plate 20 is provided on the side of the main rotating rod 16 away from the rotating shaft, and the auxiliary rotating rod 17... A collar 19 is provided on the side away from the rotating shaft. All the collars 19 of the auxiliary rotating rods 17 connected to the same harmonic frame 15 share an elastic band 21, which makes the elastic band 21 less likely to be lost in a slack state and still connected to the auxiliary rotating rods 17 for easy subsequent use. When the main rotating rod 16 and the auxiliary rotating rod 17 are in the same plane, the elastic band 21 is hung on the hanging plate 20 and is in a taut state. The elastic force of the elastic band 21 pulls the main rotating rod 16 and the auxiliary rotating rod 17 on the side away from the second bracket 9, further preventing the main rotating rod 16 and the auxiliary rotating rod 17 from bending when the main shaft rotates.

[0046] Please see Figure 4 and Figure 6Multiple telescopic rods 26 are fixedly connected to the testing platform 1 below the second support 9. A lifting platform 27 is connected to the bottom end of each telescopic rod 26. A counterweight plate 28 is rotatably connected between the lifting platforms 27. A second transmission belt 23 is connected to the rotating shaft of the counterweight plate 28. A hanging ring 13 is provided on one side of the second support 9. The top end of the second transmission belt 23 is fitted onto the hanging ring 13, ensuring that the second transmission belt 23 does not affect the rotation of the main shaft 2 when fitted onto the hanging ring 13. The telescopic rod 26 includes a fixed part and a telescopic part. The fixed part is fixedly connected to the inner wall of the testing platform 1, while the telescopic part is slidably connected to the fixed part. Inside the section, the second transmission belt 23 is kept taut by the weight of the telescopic part of the telescopic rod 26 and the structure below it, so that when the second transmission belt 23 is wrapped around the main shaft 2, it can make close contact with the main shaft 2 and is not easy to slip. When the second transmission belt 23 is hung on the hanging ring 13, it does not contact the main shaft 2, so the second transmission belt 23 does not transmit power at this time. When the second transmission belt 23 is hung on the main shaft 2, the telescopic part of the telescopic rod 26 will extend, and the second transmission belt 23 is still in a taut state, but at this time it can output power to the counterweight plate 28.

[0047] Please see Figure 6 Two symmetrical adjustment blocks 29 are radially slidably arranged on the counterweight disk 28. The position of the adjustment blocks 29 on the counterweight disk 28 is controlled by sliding. Specifically, the adjustment blocks 29 are slidably connected to the counterweight disk 28 and a limit structure is provided in the sliding track. For example, a tightened knob can position the adjustment block 29 in a specified position in the sliding track on the counterweight disk 28, which can conveniently adjust the torque of the counterweight disk 28 and better replace the torque input by the main shaft 2 to the flexible wheel 3. After the rotational life test of any flexible wheel 3 is completed, the main shaft 2 can output an equivalent torque to the counterweight disk 28, so there is no need to adjust the output power of the main shaft 2, saving the debugging time of the testing equipment.

[0048] Please see Figure 2 and Figure 8The flexible wheel 3 has an inner fixing plate 6 on its inner side and an outer fixing plate 7 on its outer side. The inner fixing plate 6 and the outer fixing plate 7 are connected to each other by bolts. The outer fixing plate 7 has a first bearing 10 inside it. The inner wall of the first bearing 10 is fitted with the top of the first bracket 8. The top of the first bracket 8 is a cylindrical structure coaxial with the main shaft 2. The torque is output by the outer fixing plate 7 fixedly connected to the flexible wheel 3. The outer wall of the outer fixing plate 7 is connected to a first transmission belt 22. The other end of the first transmission belt 22 is connected to a swing arm 25. The swing arm 25 is rotatably connected to the top of the column 24. The column 24 is fixed inside the test table 1. The end of the swing arm 25 is provided with a counterweight. By adjusting the weight of the counterweight at the end of the swing arm 25, the output load of the flexible wheel 3 can be easily adjusted, thereby obtaining the service life of the harmonic reducer under various working conditions. Specifically, the test table 1 is provided with a through-hole for the first transmission belt 22 and the second transmission belt 23 to pass through.

[0049] The working principle of this invention is as follows: Multiple flexible wheels 3 are fitted into the corresponding rigid wheels 5 on the testing platform 1. Then, the main shaft 2 passes through the tailstock 34 and the center of each harmonic frame 15, and is connected to the coupling 33. The output power of the main shaft 2 and the weight of the counterweight on the swing arm 25 are adjusted. The rotating ring 12 is rotated, and the thread inside the rotating ring 12 engages with the thread on the outer wall of the cylindrical structure at the top of the second support 9, causing the rotating ring 12 to approach the flexible wheels 3. Simultaneously, the connecting rod rotatably connected to the outer wall of the collar 14 pushes the main rotating rod 16 and the auxiliary rotating rod 17, causing them to rotate and be in the same plane. The rollers at the ends of the main rotating rod 16 and the auxiliary rotating rod 17 are in close contact with the inner wall of the flexible wheel 3. When the main shaft 2 rotates, the rollers roll on the inner wall of the flexible wheel 3. Then, the elastic band 21 is stretched so that it is fitted onto the hanging plate 20 on one side of the main rotating rod 16. At this time, the elastic band 21 is in a taut state, which further improves the stability of the main rotating rod 16. During the rotational life test, the machine can be stopped at any interval to judge the wear degree of the upper teeth and inner wall of the flexible wheel 3. When the flexible wheel 3 is judged to be in failure, the elastic band 21 corresponding to the flexible wheel 3 is removed from the hanging plate 20 to release the tension of the elastic band 21. The rotating ring 12 corresponding to the flexible wheel 3 is rotated to make the main rotating rod 16 and the auxiliary rotating rod 17 rotate out of the flexible wheel 3. Then, the second transmission belt 23 hanging on the hanging ring 13 is removed and fitted onto the main shaft 2, so that the main shaft 2 can continue to rotate for testing.

[0050] Although embodiments of the present invention have been shown and described, these specific embodiments are merely illustrative of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A device for detecting the rotational life of a flexible wheel in a harmonic reducer, comprising a testing platform, characterized in that: The testing platform has a main shaft that rotates laterally, and a drive structure is connected to one end of the main shaft. Multiple fixed frames are spaced apart along the direction of the main shaft on the testing platform. A rigid wheel is fixedly connected to one side of each fixed frame, and a flexible wheel meshes within the rigid wheel. A torque output mechanism is connected to the end of the flexible wheel, and a harmonic drive is installed inside the flexible wheel. The harmonic drive is rotatably connected to a main rotating rod and a secondary rotating rod in the same plane. Rollers are installed at the ends of both the main and secondary rotating rods, and they are in close contact with the inner wall of the flexible wheel. A second support is provided on one side of the fixed frames on the testing platform. A cylindrical structure coaxial with the main shaft is connected to the top of the second support. The outer wall of the top of the second support is threaded, and the threaded connection is... A rotating ring has a second bearing tightly fitted on the outer wall of one end, and a collar tightly fitted on the outer wall of the second bearing. Multiple connecting rods are rotatably connected to the outer wall of the collar. The other ends of these connecting rods are rotatably connected to a main rotating rod and a secondary rotating rod, respectively. The rotating shafts of the main and secondary rotating rods are located near the connecting rods. Each main or secondary rotating rod is connected to a connecting rod and is in the same plane as the connecting rod. A hanging plate is provided on the side of the main rotating rod away from the rotating shaft, and a collar is provided on the side of the secondary rotating rod away from the rotating shaft. An elastic band passes through the collars of all the secondary rotating rods. When the main and secondary rotating rods are in the same plane, the elastic band is suspended on the hanging plate and is in a taut state.

2. The device for detecting the rotational life of the flexible wheel of a harmonic reducer according to claim 1, characterized in that: The flexible wheel has an inner fixing plate on its inner side and an outer fixing plate on its outer side. The inner fixing plate and the outer fixing plate are connected to each other. The outer fixing plate is fitted with a first bearing. The inner wall of the first bearing is fitted with the top end of a first bracket. The top end of the first bracket has a cylindrical structure coaxial with the main shaft.

3. The device for detecting the rotational life of the flexible wheel of a harmonic reducer according to claim 2, characterized in that: The outer wall of the outer fixing plate is connected to a first transmission belt, and the other end of the first transmission belt is connected to a swing arm. The swing arm is rotatably connected to the top of the column, the column is fixed inside the testing table, and a counterweight is provided at the end of the swing arm.

4. The device for detecting the rotational life of the flexible wheel of a harmonic reducer according to claim 1, characterized in that: Multiple telescopic rods are fixedly connected to the lower part of the second bracket inside the testing platform. The bottom end of each telescopic rod is connected to a lifting platform. A counterweight plate is rotatably connected between the lifting platforms. The rotating shaft of the counterweight plate is connected to a second transmission belt. A hanging ring is provided on one side of the second bracket, and the top end of the second transmission belt is fitted onto the hanging ring.

5. The device for detecting the rotational life of the flexible wheel of a harmonic reducer according to claim 4, characterized in that: The telescopic rod includes a fixed part and a telescopic part, wherein the fixed part is fixedly connected to the inner wall of the testing platform, while the telescopic part is slidably connected inside the fixed part, and the second transmission belt is taut due to the gravity of the telescopic part of the telescopic rod and the structure below it.

6. The device for detecting the rotational life of the flexible wheel of a harmonic reducer according to claim 4, characterized in that: Two mutually symmetrical adjustment blocks are slidably arranged on the counterweight plate along the radial direction.

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