A hollow shaft motor test loading mechanism

Abstract

The application relates to the field of motor performance testing and discloses a hollow shaft motor test loading mechanism which comprises a workbench and a test loading mechanism installed on the workbench. The test loading mechanism comprises a test assembly, a connecting shaft assembly, an adjusting assembly and an overload shaft breaking assembly. The test assembly is installed on one side of the top end of the workbench. The connecting shaft assembly is connected to the output end of the test assembly and comprises a connecting shaft pipe which is connected to the output end of the test assembly. The first linkage rod and the second linkage rod arranged in an annular array are hingedly matched, and the self-adaptive rotary structure composed of the rotating bearing and the linkage shaft can compensate for the radial and angular coaxiality deviation between the motor to be tested and the test assembly, solves the problem that the existing mechanism is a fixed butt joint structure and the shaft center is prone to deviation when hollow shaft motors of different types are installed, and solves the problem that vibration and radial runout are generated during high-speed loading, torque, rotating speed and other test data are distorted.

Description

Technical Field

[0001] This invention relates to the field of motor performance testing technology, specifically to a hollow shaft motor test loading mechanism. Background Technology

[0002] Hollow shaft motors, with their advantages of lightweight design, hollow wiring, and high transmission integration, are widely used in high-precision transmission fields such as industrial automation, robotics, aerospace, and new energy equipment. Their operational stability, torque capacity, bearing compatibility, and high-speed durability directly determine the overall reliability of the equipment. Therefore, in the factory inspection, type testing, and durability life testing of hollow shaft motors, a high-precision, highly adaptable, and highly stable loading test mechanism is the core equipment to ensure the accuracy of motor performance test data.

[0003] Currently, most hollow shaft motor test loading mechanisms adopt traditional solid shaft docking structures, fixed fulcrum torque loading structures, or standard dynamometer direct-connection loading structures. They mainly achieve motor load testing through single-point pressure application via extended shafts, fixed flange docking, and rigid transmission connections.

[0004] The inventors of this application discovered in their research that the core defect of the aforementioned prior art is that the transmission docking fulcrum and mounting base of the existing loading mechanism are mostly fixed structures. That is, when the motor under test is installed, its output shaft is fixedly connected to the transmission shaft on the loading mechanism. However, due to the diversity of motor models under test, it is difficult to ensure that the transmission shafts of different models of motors are all on the same central axis as the transmission shaft of the loading mechanism. If there are problems such as shaft center offset or coaxiality deviation in the connection between the shafts, the motor will generate severe vibration, radial runout and transmission noise when it rotates at high speed. This will not only cause distortion of test data such as torque, speed and durability, but also result in poor overall practicality. Summary of the Invention

[0005] This invention provides a hollow shaft motor test loading mechanism, which solves the problems of existing loading mechanisms, where the fulcrum and base are mostly fixed structures, making it difficult to accurately align different models of motors, easily causing coaxiality deviations, vibration and runout problems, resulting in distorted test data and poor overall practicality. It achieves a soft connection between shafts, so that even if the centerlines of the two shafts are not on the same centerline, it will not affect the effect of subsequent normal testing.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hollow shaft motor test loading mechanism, comprising a worktable and a test loading mechanism mounted on the worktable: The test loading mechanism includes a test component, a coupling component, an adjustment component, and an overload shaft breakage component; The test component is mounted on one side of the top of the workbench; A coupling assembly is connected to the output end of a test assembly. The coupling assembly includes a connecting shaft tube connected to the output end of the test assembly. One end of the connecting shaft tube has a spline groove in its inner cavity, and the other end of the connecting shaft tube is connected to a first synchronous turntable. The surface of the first synchronous turntable has a through hole, and the inner cavity of the through hole extends a first linkage rod. The other end of the first linkage rod is connected to a connector, and a second linkage rod is sleeved on the outer side of one end of the connector. The other end of the second linkage rod is connected to a second synchronous turntable. An adjustment assembly is installed on one side of the second synchronous turntable. The adjustment assembly includes a connecting seat, which is fixed to one side of the second synchronous turntable. A rotating bearing is movably connected to the inner side of the other end of the connecting seat. A linkage shaft is movably connected to the rotating bearing. A hollow shaft connecting rod is connected to the other end of the linkage shaft. A connecting groove is opened on the inner side of one end of the hollow shaft connecting rod.

[0007] By adopting the above technical solution, through the hinged cooperation of the first and second linkage rods arranged in a ring array, combined with the adaptive rotation structure composed of rotating bearings and linkage shafts, it is possible to compensate for the radial and angular coaxiality deviations between the motor under test and the test components. This solves the problem that existing mechanisms are fixed docking structures, which are prone to shaft center misalignment when installing different models of hollow shaft motors, resulting in vibration and radial runout during high-speed loading, causing distortion of test data such as torque and speed. Stable torque transmission can be achieved without extremely high installation alignment accuracy, improving the device's adaptability to different models of hollow shaft motors and the accuracy of test data.

[0008] Preferably, the test assembly includes a brake mounted on one side of the top of the workbench. The output end of the brake is connected to a first coupling, the other end of the first coupling is connected to a dynamic torque sensor, the end of the dynamic torque sensor away from the first coupling is connected to a second coupling, the other end of the second coupling is connected to a fixed gear seat, and the other side of the fixed gear seat is meshed with a movable gear seat.

[0009] Preferably, the overload shaft breakage assembly includes a guide rod, which is fixed to the outer ring surface of the fixed gear seat. A return spring is sleeved on the outer ring surface of one end of the guide rod. An extension ear is fixed on the outer ring surface of the movable gear seat. A contact head is fixed at the bottom of the movable gear seat. A pressure sensor is connected to one side of the contact head. A support seat is sleeved on the outer ring surface of the fixed gear seat.

[0010] Preferably, an adjustment seat is slidably connected to the top of the worktable on the side away from the brake, and the top of the adjustment seat is detachably mounted with the motor to be tested.

[0011] Preferably, a turntable connecting rod is fixed at the center of one end of the first synchronous turntable near the connecting shaft tube, and a snap-fit ​​spline is fixed on the outer ring surface of the turntable connecting rod.

[0012] Preferably, the through holes are arranged in a circular array along the center point of the first synchronous turntable, and the through holes and the first synchronous turntable form an integrated structure.

[0013] Preferably, the first linkage rod is rotatably connected to the second linkage rod via a connector, and the first linkage rod is arranged in a circular array along the center point of the first synchronous turntable.

[0014] Preferably, the two ends of the linkage shaft are rotatably connected to the connecting seat and the hollow shaft connecting rod respectively through rotating bearings, and the linkage shaft is rotatably connected to the rotating bearing through the shaft rod.

[0015] Preferably, the outer diameter of the turntable connecting rod is adapted to the inner diameter of the connecting shaft tube, and the number of snap-fit ​​splines is consistent with the number of spline grooves.

[0016] Preferably, the two ends of the return spring are fixedly connected to one end surface of the fixed toothed seat extension and one end surface of the extension ear, respectively.

[0017] Preferably, the inner side of the extension ear has a hole with a diameter that matches the outer diameter of the guide rod, and the extension ears are arranged in a circular array along the center point of the outer ring surface of the movable tooth seat.

[0018] This invention provides a test loading mechanism for a hollow shaft motor. It has the following advantages: 1. This invention utilizes a first and second linkage rod arranged in a ring array, hinged together, and combined with a rotating bearing and linkage shaft to form an adaptive rotation structure. This structure can compensate for radial and angular coaxiality deviations between the motor under test and the test components. It solves the problem that existing mechanisms are fixed docking structures, which are prone to shaft center misalignment when installing different models of hollow shaft motors. High-speed loading generates vibration and radial runout, causing distortion of test data such as torque and speed. Stable torque transmission can be achieved without extremely high installation alignment accuracy, improving the device's adaptability to different models of hollow shaft motors and the accuracy of test data.

[0019] 2. This invention, through the design of fixed and movable toothed seats, allows the movable toothed seat to disengage from the fixed toothed seat when the test torque exceeds the safety threshold, relying on the axial force of the tooth surface to cut off the torque transmission and simulate the failure condition of a broken motor shaft. At the same time, the pressure sensor can provide real-time feedback of the overload signal, and after the overload is eliminated, the return spring can drive the component to automatically reset and restore transmission. This invention can not only complete the overload failure simulation test, but also provide overload protection for the entire test mechanism, improving the safety and functionality of the test. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a side view of the worktable of the present invention; Figure 3 This is a side view schematic diagram of the dynamic torque sensor of the present invention; Figure 4 This is a side view of the connecting shaft tube of the present invention; Figure 5 This is a side view of the first synchronous turntable of the present invention; Figure 6 This is a side view of the first linkage rod of the present invention; Figure 7 This is a side view of the second synchronous turntable of the present invention.

[0021] The components are as follows: 1. Worktable; 2. Brake; 3. First coupling; 4. Dynamic torque sensor; 5. Second coupling; 6. Fixed gear seat; 7. Movable gear seat; 8. Connecting shaft tube; 9. Spline groove; 10. First synchronous turntable; 11. Through hole; 12. First linkage rod; 13. Connecting piece; 14. Second linkage rod; 15. Second synchronous turntable; 16. Connecting seat; 17. Rotary bearing; 18. Linkage shaft; 19. Hollow shaft connecting rod; 20. Connecting groove; 21. Turntable connecting rod; 22. Snap spline; 23. Guide rod; 24. Return spring; 25. Extension ear; 26. Contact head; 27. Pressure sensor; 28. Support seat; 29. ​​Adjusting seat; 30. Motor under test. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0023] Please see the appendix Figure 1 - Appendix Figure 7 This invention provides a test loading mechanism for a hollow shaft motor, including a workbench 1 and a test loading mechanism mounted on the workbench 1: The test loading mechanism includes a test component, a coupling component, an adjustment component, and an overload shaft breakage component; The test component is mounted on one side of the top of workbench 1; A coupling assembly is connected to the output end of the test assembly. The coupling assembly includes a connecting shaft tube 8, which is connected to the output end of the test assembly. One end of the connecting shaft tube 8 has a spline groove 9 in its inner cavity, and the other end of the connecting shaft tube 8 is connected to a first synchronous turntable 10. The surface of the first synchronous turntable 10 has a through hole 11, and the inner cavity of the through hole 11 extends a first linkage rod 12. The other end of the first linkage rod 12 is connected to a connector 13, and a second linkage rod 14 is sleeved on the outer side of one end of the connector 13. The other end of the second linkage rod 14 is connected to a second synchronous turntable 15. An adjustment assembly is installed on one side of the second synchronous turntable 15. The adjustment assembly includes a connecting seat 16, which is fixed to one side of the second synchronous turntable 15. A rotating bearing 17 is movably connected to the inner side of the other end of the connecting seat 16. A linkage shaft 18 is movably connected to the rotating bearing 17. A hollow shaft connecting rod 19 is connected to the other end of the linkage shaft 18. A connecting groove 20 is opened on the inner side of one end of the hollow shaft connecting rod 19. Specifically, during testing, the motor output torque is transmitted to the linkage shaft 18 via the hollow shaft connecting rod 19. Since the linkage shaft 18 forms a rotary engagement with the connecting seat 16 and the hollow shaft connecting rod 19 respectively through the rotating bearings 17 at both ends, the hollow shaft connecting rod 19 can adaptively adjust its position while transmitting torque. This compensates for the coaxiality deviation at the output end of the motor 30 under test. Furthermore, the rotation of the hollow shaft connecting rod 19 causes the linkage shaft 18 to drive the connecting seat 16 to rotate. At this time, the connecting seat 16, along with the torque, drives the second synchronous turntable 15 to rotate synchronously. The second synchronous turntable 15 drives multiple engaging second linkage rods 14 to perform circular motion. The second linkage rod 14 drives the first linkage rod 12 to operate synchronously through the connector 13. The connector 13 allows relative rotation between the first linkage rod 12 and the second linkage rod 14. When there is angular or radial offset between the two turntables, the first linkage rod 12 and the second linkage rod 14 arranged in a ring array can adaptively deflect at different angles, further absorbing the centering error without interrupting the torque transmission. Since the first linkage rod 12 passes through the through hole 11 on the first synchronous turntable 10, the torque can be transmitted to the first synchronous turntable 10. At this time, since the first synchronous turntable 10 is connected to the connecting shaft tube 8, the torque can be stably transmitted to the connecting shaft tube 8. Among them, the through hole 11 provides motion guidance for the first linkage rod 12. The rod structure of the ring array distributes the transmission load, reduces the force on a single rod, avoids off-center loading and jamming, reduces vibration and radial movement during rotation, and ensures torque transmission accuracy. After receiving the torque, the connecting shaft tube 8 outputs power outward. The entire transmission link relies on the hinged rod and the bearing rotation structure to form a soft connection transmission. Even if there is a certain offset between the subsequent motor output shaft and the rear transmission shaft, the torque transmission can still be completed smoothly, reducing the test interference caused by shaft offset, ensuring a smooth and reliable transmission process, and providing stable power input conditions for the rear torque test. It is worth noting that the first linkage rod 12 and the second linkage rod 14 can slide along the through holes 11 opened on the inner side of the first synchronous turntable 10 and the second synchronous turntable 15, respectively.

[0024] Please see the appendix Figure 1 , Figure 3 and Figure 4 The test assembly includes a brake 2, which is mounted on one side of the top of the workbench 1. The output end of the brake 2 is connected to a first coupling 3. The other end of the first coupling 3 is connected to a dynamic torque sensor 4. The end of the dynamic torque sensor 4 away from the first coupling 3 is connected to a second coupling 5. The other end of the second coupling 5 is connected to a fixed gear seat 6. The other side of the fixed gear seat 6 is meshed with a movable gear seat 7. Specifically, during the test, brake 2 operates to provide load resistance to the mechanism, thereby simulating the actual working load condition of the hollow shaft motor. The torque is output from the coupling assembly and transmitted to the movable gear seat 7. The fixed gear seat 6 is driven to rotate synchronously by the meshing action of the tooth surfaces. The fixed gear seat 6 transmits the torque to the dynamic torque sensor 4 via the second coupling 5. The dynamic torque sensor 4 collects the torque and speed data under the current working condition in real time. After the data collection is completed, the power is transmitted to brake 2 through the first coupling 3. Brake 2 applies braking resistance to complete the loading closed loop and realize the detection of motor load performance data.

[0025] Please see the appendix Figure 3 and attached Figure 4 The overload shaft breakage assembly includes a guide rod 23, which is fixed to the outer ring surface of the fixed gear seat 6. A return spring 24 is sleeved on the outer ring surface of one end of the guide rod 23. An extension ear 25 is fixed on the outer ring surface of the movable gear seat 7. A contact head 26 is fixed on the bottom of the movable gear seat 7. A pressure sensor 27 is connected to one side of the contact head 26. A support seat 28 is sleeved on the outer ring surface of the fixed gear seat 6. Specifically, when the torque output by the brake 2 exceeds the set safety threshold during the test, the axial force on the meshing tooth surface between the movable tooth seat 7 and the fixed tooth seat 6 increases. This axial force overcomes the preload of the return spring 24, thereby pushing the movable tooth seat 7 to move axially along the guide rod 23, which in turn causes the movable tooth seat 7 and the fixed tooth seat 6 to disengage from each other, cutting off the torque transmission path and simulating the shaft breakage failure condition. As the movable gear seat 7 moves, it drives the extension ear 25 to slide along the guide rod 23. The contact head 26 at the bottom of the movable gear seat 7 simultaneously presses against the pressure sensor 27. The pressure sensor 27 collects pressure signals to provide feedback on the overload condition. When the overload condition is relieved, the reset spring 24 releases its elastic force to push the extension ear 25 back to its original position, driving the movable gear seat 7 to reset and re-engage with the fixed gear seat 6, restoring torque transmission. The support seat 28 provides auxiliary support and limit for the overall structure of the guide rod 23, ensuring stable displacement movement.

[0026] Please see the appendix Figure 2 Appendix Figure 5 and attached Figure 6 A turntable connecting rod 21 is fixed at the center of one end of the first synchronous turntable 10 near the connecting shaft tube 8, and a snap spline 22 is fixed on the outer ring surface of the turntable connecting rod 21. Specifically, when installing the first synchronous turntable 10, the turntable connecting rod 21 fixed at the center of one side of the first synchronous turntable 10 will be engaged with the inner side of the connecting shaft tube 8. At this time, multiple snap-fit ​​splines 22 arranged equidistantly along the outer ring surface of the turntable connecting rod 21 will be engaged with the inner side of the spline groove 9, thereby realizing the quick snap-fit ​​between the first synchronous turntable 10 and the connecting shaft tube 8, which is convenient and fast.

[0027] Please see the appendix Figure 1 and attached Figure 2 An adjustment seat 29 is slidably connected to the top of the workbench 1 on the side away from the brake 2. The top of the adjustment seat 29 is detachably mounted with the motor 30 to be tested. Specifically, when installing the motor under test 30, the motor under test 30 is detachably installed on the adjusting seat 29 in advance. Then, the adjusting seat 29 is slid along the slot opened on the surface of the workbench 1 to adjust the position of the motor under test 30. After the adjustment is completed, the adjusting seat 29 is positioned. At this time, the output shaft of the motor under test 30 is engaged in the hollow shaft connecting rod 19, which facilitates the subsequent testing and processing of the motor under test 30.

[0028] Please see the appendix Figure 5 and attached Figure 6 The through holes 11 are arranged in a circular array along the center point of the first synchronous turntable 10, and the through holes 11 and the first synchronous turntable 10 form an integrated structure. Specifically, the through holes 11 arranged in a ring array provide evenly distributed installation and positioning points for multiple first linkage rods 12. The integrated structure ensures the relative position accuracy of the through holes 11. During the rotational transmission process, the arrayed first linkage rods 12 are synchronously stressed, and the torque input by the second synchronous turntable 15 is evenly distributed to each rod, reducing the load on a single rod, improving transmission stability, and avoiding uneven load jamming. In addition, the through holes 11 can provide a guiding effect for the sliding of the first linkage rods 12.

[0029] Please see the appendix Figure 5 and attached Figure 6 The first linkage rod 12 is rotatably connected to the second linkage rod 14 through the connector 13, and the first linkage rod 12 is arranged in a ring array along the center point of the first synchronous turntable 10. Specifically, the connector 13 acts as a hinged intermediary, allowing a relative rotation angle between the first linkage rod 12 and the second linkage rod 14. When the axis of the motor under test 30 and the test component is offset, the first linkage rod 12 and the second linkage rod 14 can adaptively deflect at different angles to compensate for angular and radial position deviations. The ring array arrangement ensures that the torque is uniformly transmitted in the circumferential direction and will not lose torque transmission capability due to angle compensation, thus realizing simultaneous angle compensation and torque transmission.

[0030] Please see the appendix Figure 5 Appendix Figure 6 and attached Figure 7 The two ends of the linkage shaft 18 are rotatably connected to the connecting seat 16 and the hollow shaft connecting rod 19 respectively through the rotating bearing 17. The linkage shaft 18 is rotatably connected to the rotating bearing 17 through the shaft. Specifically, the rotating bearings 17 provide rotational support at both ends of the linkage shaft 18. When the hollow shaft connecting rod 19 rotates with the output shaft of the motor under test 30, it can rotate independently relative to the linkage shaft 18. The linkage shaft 18 can also rotate relative to the connecting seat 16. The overall structure allows the hollow shaft connecting rod 19 to have a certain positional self-adaptation capability while bearing torque. This further cooperates with the coupling assembly to absorb installation alignment errors, reduce frictional resistance generated during rotation, and reduce the interference of vibration on test data.

[0031] Please see the appendix Figure 4 Appendix Figure 5 and attached Figure 6 The outer diameter of the turntable connecting rod 21 is compatible with the inner diameter of the connecting shaft tube 8, and the number of snap-fit ​​splines 22 is the same as the number of spline grooves 9. Specifically, the size fit ensures that the turntable connecting rod 21 can be smoothly installed into the inner cavity of the connecting shaft tube 8, and the snap spline 22 and spline groove 9 mesh one-to-one to achieve complete circumferential positioning and prevent circumferential slippage during transmission. At the same time, the matching size can control the radial clearance, reduce radial movement during rotation, and ensure torque transmission accuracy.

[0032] Please see the appendix Figure 3 The inner side of the extension ear 25 has a hole with a diameter that matches the outer diameter of the guide rod 23. The extension ear 25 is arranged in a ring array along the center point of the outer ring surface of the movable tooth seat 7. Specifically, since the guide rod 23 passes through the inside of the extension ear 25 and extends to one side of it, when the movable tooth seat 7 is subjected to force and moves, causing the extension ear 25 to move, the extension ear 25 will slide along the guide rod 23, thereby improving the stability of the movable tooth seat 7 during its movement.

[0033] Workflow: When assembling the testing device, the turntable connecting rod 21, which is fixed at the center of one side of the first synchronous turntable 10, will be engaged with the inner side of the connecting shaft tube 8. At this time, multiple snap-fit ​​splines 22, which are equidistantly arranged along the outer ring surface of the turntable connecting rod 21, will be engaged with the inner side of the spline groove 9, thereby realizing the quick snap-fit ​​between the first synchronous turntable 10 and the connecting shaft tube 8, which is convenient and fast. When installing the motor under test 30, the motor under test 30 is detachably installed on the adjusting seat 29 in advance. Then, the adjusting seat 29 is slid along the slot opened on the surface of the workbench 1 to adjust the position of the motor under test 30. After the adjustment is completed, the adjusting seat 29 is positioned. At this time, the output shaft of the motor under test 30 is engaged in the hollow shaft connecting rod 19, which facilitates the subsequent testing and processing of the motor under test 30. During testing, the motor output torque is transmitted to the linkage shaft 18 via the hollow shaft connecting rod 19. Since the linkage shaft 18 forms a rotary engagement with the connecting seat 16 and the hollow shaft connecting rod 19 respectively through the rotating bearings 17 at both ends, the hollow shaft connecting rod 19 can adaptively adjust its position while transmitting torque. This compensates for the coaxiality deviation at the output end of the motor 30 under test. Furthermore, the rotation of the hollow shaft connecting rod 19 causes the linkage shaft 18 to drive the connecting seat 16 to rotate. At this time, the connecting seat 16, along with the torque, drives the second synchronous turntable 15 to rotate synchronously. The second synchronous turntable 15 drives multiple engaged second linkage rods 14 to perform circular motion. The second linkage 14 drives the first linkage 12 to operate synchronously through the connector 13. The connector 13 allows relative rotation between the first linkage 12 and the second linkage 14. When there is angular or radial offset between the two turntables, the first linkage 12 and the second linkage 14 arranged in a ring array can adaptively deflect different angles and further absorb the centering error without interrupting the torque transmission. Since the first linkage 12 passes through the through hole 11 on the first synchronous turntable 10, the torque can be transmitted to the first synchronous turntable 10. At this time, since the first synchronous turntable 10 is connected to the connecting shaft tube 8, the torque can be stably transmitted to the connecting shaft tube 8. Among them, the through hole 11 provides motion guidance for the first linkage rod 12. The rod structure of the ring array distributes the transmission load, reduces the force on a single rod, avoids off-center loading and jamming, reduces vibration and radial movement during rotation, and ensures torque transmission accuracy. After receiving the torque, the connecting shaft tube 8 outputs power outward. The entire transmission link relies on the hinged rod and the bearing rotation structure to form a soft connection transmission. Even if there is a certain offset between the subsequent motor output shaft and the rear transmission shaft, the torque transmission can still be completed smoothly, reducing the test interference caused by shaft offset, ensuring a smooth and reliable transmission process, and providing stable power input conditions for the rear torque test. Brake 2 operates, providing load resistance to the mechanism to simulate the actual working load condition of the hollow shaft motor. The torque is output from the coupling assembly and transmitted to the movable gear seat 7. The fixed gear seat 6 is driven to rotate synchronously by the meshing action of the tooth surfaces. The fixed gear seat 6 transmits the torque to the dynamic torque sensor 4 via the second coupling 5. The dynamic torque sensor 4 collects the torque and speed data under the current working condition in real time. After the data is collected, the power is transmitted to brake 2 through the first coupling 3. Brake 2 applies braking resistance to complete the loading closed loop and realize the detection of motor load performance data. When the torque output by brake 2 exceeds the set safety threshold during the test, the axial component force on the meshing tooth surface between the movable gear seat 7 and the fixed gear seat 6 increases. This axial component force overcomes the preload force of the return spring 24, thereby pushing the movable gear seat 7 to move axially along the guide rod 23, thereby causing the movable gear seat 7 and the fixed gear seat 6 to disengage from each other, cutting off the torque transmission path and simulating the shaft breakage failure condition.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hollow shaft motor test loading mechanism, comprising a worktable (1) and a test loading mechanism mounted on the worktable (1), characterized in that: The test loading mechanism includes a test component, a coupling component, an adjustment component, and an overload shaft breakage component; The test component is installed on one side of the top of the workbench (1); A coupling assembly is connected to the output end of the test assembly. The coupling assembly includes a connecting shaft tube (8), which is connected to the output end of the test assembly. A spline groove (9) is provided in the inner cavity of one end of the connecting shaft tube (8), and a first synchronous turntable (10) is connected to the other end of the connecting shaft tube (8). A through hole (11) is provided on the surface of the first synchronous turntable (10), and a first linkage rod (12) extends from the inner cavity of the through hole (11). A connector (13) is connected to the other end of the first linkage rod (12), and a second linkage rod (14) is sleeved on the outer side of one end of the connector (13). A second synchronous turntable (15) is connected to the other end of the second linkage rod (14). An adjustment assembly is installed on one side of the second synchronous turntable (15). The adjustment assembly includes a connecting seat (16), which is fixed on one side of the second synchronous turntable (15). A rotating bearing (17) is movably connected to the inner side of the other end of the connecting seat (16). A linkage shaft (18) is movably connected to the rotating bearing (17). A hollow shaft connecting rod (19) is connected to the other end of the linkage shaft (18). A connecting groove (20) is opened on the inner side of one end of the hollow shaft connecting rod (19).

2. The hollow shaft motor test loading mechanism according to claim 1, characterized in that, The test assembly includes a brake (2), which is mounted on one side of the top of the workbench (1). The output end of the brake (2) is connected to a first coupling (3), and the other end of the first coupling (3) is connected to a dynamic torque sensor (4). The end of the dynamic torque sensor (4) away from the first coupling (3) is connected to a second coupling (5), and the other end of the second coupling (5) is connected to a fixed gear seat (6). The other side of the fixed gear seat (6) is meshed with a movable gear seat (7).

3. The hollow shaft motor test loading mechanism according to claim 2, characterized in that, The overload broken shaft assembly includes a guide rod (23), which is fixed to the outer ring surface of the fixed gear seat (6). A return spring (24) is sleeved on the outer ring surface of one end of the guide rod (23). An extension ear (25) is fixed on the outer ring surface of the movable gear seat (7). A contact head (26) is fixed on the bottom of the movable gear seat (7). A pressure sensor (27) is connected to one side of the contact head (26). A support seat (28) is sleeved on the outer ring surface of the fixed gear seat (6).

4. The hollow shaft motor test loading mechanism according to claim 1, characterized in that, An adjustment seat (29) is slidably connected to the top of the workbench (1) on the side away from the brake (2), and the motor to be tested (30) is detachably installed on the top of the adjustment seat (29).

5. The hollow shaft motor test loading mechanism according to claim 1, characterized in that, The first synchronous turntable (10) is fixed with a turntable connecting rod (21) at one end near the center of the connecting shaft tube (8), and the outer ring surface of the turntable connecting rod (21) is fixed with a snap spline (22).

6. The hollow shaft motor test loading mechanism according to claim 1, characterized in that, The through holes (11) are arranged in a circular array along the center point of the first synchronous turntable (10), and the through holes (11) and the first synchronous turntable (10) form an integrated structure.

7. The hollow shaft motor test loading mechanism according to claim 1, characterized in that, The first linkage rod (12) is rotatably connected to the second linkage rod (14) through the connector (13), and the first linkage rod (12) is arranged in a ring array along the center point of the first synchronous turntable (10).

8. The hollow shaft motor test loading mechanism according to claim 1, characterized in that, The two ends of the linkage shaft (18) are rotatably connected to the connecting seat (16) and the hollow shaft connecting rod (19) respectively through the rotating bearing (17). The linkage shaft (18) is rotatably connected to the rotating bearing (17) through the shaft.

9. A hollow shaft motor test loading mechanism according to claim 5, characterized in that, The outer diameter of the turntable connecting rod (21) is compatible with the inner diameter of the connecting shaft tube (8), and the number of snap-fit ​​splines (22) is consistent with the number of spline grooves (9).

10. A hollow shaft motor test loading mechanism according to claim 3, characterized in that, The inner side of the extension ear (25) has a hole whose diameter is adapted to the outer diameter of the guide rod (23), and the extension ear (25) is arranged in a ring array along the center point of the outer ring surface of the movable tooth seat (7).

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