A test platform for reducer hysteresis curve

Abstract

The present invention discloses a reducer hysteresis curve test platform, comprising a test bench, a reducer mounting frame arranged on the test bench, a reducer, an output disk connector fixed to the output disk of the reducer, a measuring piece for obtaining the rotation angle of the output disk connector, and a driving mechanism for providing torque to the output disk connector. The reducer is mounted on the reducer mounting frame, and a test input shaft is arranged on the reducer. The first end of the test input shaft is fixedly connected to the reducer mounting frame through an input shaft positioning plate; the second end of the test input shaft is fixed to the output disk connector through a bearing. The measuring piece is a digital display inclinometer, and the torque applied by the driving mechanism to the output disk connector is transmitted through the measuring piece. Compared with the prior art, the present invention can effectively improve the accuracy of the hysteresis curve test.

Description

Technical Field

[0001] The invention relates to a reducer testing device, in particular to a reducer hysteresis curve testing platform. Background Art

[0002] RV reducer is a planetary transmission mechanism with small tooth difference. It has the advantages of small size, high rigidity, strong load-bearing capacity, long life and high precision. It is currently widely used in precision transmission fields such as industrial robots, medical equipment, aerospace equipment, and CNC machine tools.

[0003] Torsional stiffness and transmission accuracy are the core technical parameters of RV reducers, which are the direct reflection of the load-bearing capacity of reducers. These two indicators of reducers are calculated from the hysteresis curve. The test method of hysteresis curve is to fix the input shaft of RV reducer, apply gradual torque on the output disk of reducer and measure the rotation angle of output end and applied torque, and draw it with torque as horizontal coordinate and rotation angle as vertical coordinate.

[0004] In the prior art, the input shaft of the RV reducer is generally fixed at one end during the fixing process, while the end of the input shaft close to the output shaft of the RV reducer is in a free state. The free end of the input shaft is prone to swing when receiving the torque transmitted from the output shaft, thereby affecting the accuracy of the hysteresis curve.

[0005] In view of this, it is necessary to provide a reducer hysteresis curve testing platform that improves the accuracy of hysteresis curve testing. Summary of the invention

[0006] The purpose of the present invention is to provide a reducer hysteresis curve test platform to solve the deficiencies in the prior art, which can effectively improve the accuracy of hysteresis curve testing.

[0007] The present invention provides a reducer hysteresis curve test platform, comprising a test bench, a reducer mounting frame arranged on the test bench, a reducer, an output disk connecting member fixed to an output disk of the reducer, a measuring member for obtaining a rotation angle of the output disk connecting member, and a driving mechanism for providing torque to the output disk connecting member;

[0008] The reducer is mounted on the reducer mounting frame, and a test input shaft is provided on the reducer, a first end of the test input shaft is fixedly connected to the reducer mounting frame through an input shaft positioning plate; a second end of the test input shaft is fixed to the output disk connecting member through a bearing;

[0009] The reducer is an RV reducer, a through hole for the test input shaft to pass through is provided at the center position of the input shaft positioning plate, the second end of the test input shaft passes through the through hole and is inserted into the inner ring of the bearing, the second end of the test input shaft is interference fit with the inner ring of the bearing, and the first end of the test input shaft is fixed to the input shaft positioning plate by bolts;

[0010] The measuring member is a digital display inclinometer, and the torque applied by the driving mechanism to the output disk connecting member is transmitted through the measuring member.

[0011] As a further preferred solution, the driving mechanism includes a servo motor and a gear box arranged on the stand;

[0012] The input shaft of the gear box is connected to the rotating shaft of the servo motor, and the output shaft of the gear box is connected and fixed to the measuring piece.

[0013] As a further preferred solution, the gear box and the rotating shaft of the servo motor are connected and fixed via a diaphragm coupling.

[0014] As a further preferred solution, the measuring member comprises a stator, a rotor rotatably matched with the stator, and a scale code disk for recording the rotation angles of the stator and the rotor; the scale code disk is arranged between the stator and the rotor;

[0015] The output shaft of the gearbox is connected to the first end of the output disc connector through the rotor;

[0016] The stator is fixed on the housing of the gear box.

[0017] As a further preferred solution, a first clamping member matched with the output shaft of the gear box is provided at the first end of the rotor, and a second clamping member matched with the first end of the output disk connector is provided at the second end of the rotor.

[0018] As a further preferred solution, the reducer mounting frame includes a support frame for fixing the reducer and a base plate fixedly connected to the support frame, the base plate slidingly cooperates with the frame, and the base plate slides on the frame towards or away from the gear box.

[0019] As a further preferred solution, a first slide rail is provided on the stand, and a first sliding block slidably matched with the first slide rail is provided on the bottom plate.

[0020] As a further preferred solution, the bottom plate is also provided with a locking member for locking the position of the bottom plate.

[0021] The locking member comprises a locking handle and a locking screw, and the bottom plate is provided with a threaded hole matched with the locking screw;

[0022] The first end of the locking screw is connected and fixed to the locking handle, and the second end of the locking screw passes through the threaded hole and freely extends in the direction of the stand.

[0023] As a further preferred solution, the stand is also provided with a first blocking block for limiting the sliding travel of the bottom plate.

[0024] As a further preferred solution, the servo motor is mounted and fixed on the base plate via a motor support frame, and the motor support frame is slidably matched with the stand.

[0025] Compared with the prior art, the embodiment of the present invention fixes the end of the test input shaft close to the output disk connector through a bearing, and the above design realizes the simultaneous limit of both ends of the test input shaft, avoiding the swing or shaking of the test input shaft when subjected to torque, and improving the accuracy of obtaining the hysteresis curve. At the same time, in the process of obtaining the rotation angle of the reducer, the torque output by the drive mechanism to the output disk of the reducer directly transmitted by the measuring piece can more directly obtain the rotation angle of the output disk of the reducer after being subjected to torque, further improving the accuracy of the hysteresis curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a first isometric diagram of a reducer hysteresis curve test platform disclosed in an embodiment of the present invention;

[0027] Figure 2 It is a second isometric diagram of the reducer hysteresis curve test platform disclosed in an embodiment of the present invention;

[0028] Figure 3 It is a front view of a reducer hysteresis curve test platform disclosed in an embodiment of the present invention;

[0029] Figure 4 yes Figure 3 Top view

[0030] Figure 5 It is a schematic diagram of the installation structure of the reducer in the reducer hysteresis curve test platform disclosed in an embodiment of the present invention;

[0031] Figure 6 It is a first isometric view of a measuring component in a reducer hysteresis curve test platform disclosed in an embodiment of the present invention;

[0032] Figure 7 It is a second isometric view of the measuring part in the reducer hysteresis curve test platform disclosed in the embodiment of the present invention;

[0033] Description of reference numerals: 1-stand, 11-first slide rail, 12-first stop block, 13-second slide rail, 14-second stop block,

[0034] 2-servo motor, 21-diaphragm coupling, 3-reducer mounting frame, 31-support frame, 32-base plate, 321-first slider, 322-locking piece, 323-locking handle, 324-locking screw,

[0035] 4-reducer, 41-test input shaft,

[0036] 5-output disc connector, 50-bearing mounting hole, 51-connecting disc, 52-connecting shaft,

[0037] 6- measuring piece, 61- stator, 62- rotor, 621- first clamping sleeve, 622- second clamping sleeve, 63-

[0038] 7-input shaft positioning plate, 8-bearing, 9-gear box, 91-box,

[0039] 10-motor support frame, 101-motor support plate, 102-motor base, 1021-second slider. DETAILED DESCRIPTION

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

[0041] Embodiments of the present invention: Figure 1-4 As shown, it includes a stand 1, a driving mechanism, a reducer mounting frame 3, a reducer 4, an output disk connector 5 and a measuring member 6; the driving mechanism includes a servo motor 2 and a gearbox 9, and the servo motor 2, the gearbox 9 and the reducer mounting frame 3 are sequentially mounted on the stand 1. The reducer 4 is mounted and fixed on the reducer mounting frame 3, and the output disk connector 5 is connected and fixed to the output disk of the reducer 4. The servo motor 2 provides torque for the rotation of the output disk connector 5. The use of the servo motor 2 can know the exact torque value provided by the servo motor 2 to the output disk connector 5. The output disk connector 5 is connected and fixed to the output disk of the reducer, so that the torque transmitted by the servo motor 2 can be applied to the output disk of the reducer, thereby obtaining the torque received by the output disk of the reducer 4. The gearbox 9 is used to transmit the torque output by the servo motor 2 to the output disk connector 5. Through the setting of the gearbox 9, the torque transmitted by the motor 2 can be effectively amplified.

[0042] The measuring member 6 is used to measure the angle of rotation of the output disk connector 5 when it is subjected to the torque transmitted by the servo motor 2. The torque transmitted by the servo motor 2 can be obtained. At this time, it is only necessary to fix the input shaft of the reducer 4 to obtain the hysteresis curve based on the torque and the angle of rotation. In this embodiment, in order to more accurately obtain the angle measured by the measuring member 6, the measuring member 6 is a digital display inclinometer, and the torque applied by the drive mechanism to the output disk connector 5 is transmitted through the measuring member 6. The torque output by the drive mechanism to the output disk of the reducer 4 is directly transmitted through the measuring member 6. The rotation angle generated by the output disk of the reducer 4 after receiving the torque can be more directly obtained, which further improves the accuracy of the hysteresis curve.

[0043] In the prior art, the method of fixing the reducer 4 is to directly fix the first end of the input shaft of the reducer 4 on the corresponding fastener, and the second end of the input shaft is in a free state and extends near the output disk of the reducer 4. Since the input shaft is only fixed at one end in the above design, the free end of the input shaft is prone to swing or shake when it is subjected to the torque transmitted by the servo motor 2, thereby affecting the accuracy of the hysteresis curve.

[0044] like Figure 5 As shown, in order to solve the above technical problems, the reducer 4 of the embodiment of the present invention is provided with a test input shaft 41, and the first end of the test input shaft 41 is fixedly connected to the reducer mounting frame 3 through the input shaft positioning plate 7. The second end of the test input shaft 41 is fixed to the output disk connector 5 through the bearing 8. The first end of the test input shaft 41 is fixedly mounted through the input shaft positioning plate 7, and the second end of the test input shaft 41 is also limited and fixed through the bearing 8, so that the test input shaft 41 can be more stable when subjected to torque, and will not swing or shake, thereby improving the accuracy of the hysteresis curve obtained by the test platform.

[0045] In this embodiment, a through hole is provided at the center of the input shaft positioning plate 7 for the test input shaft 41 to pass through, and the second end of the test input shaft 41 passes through the through hole and then is inserted into the inner ring of the bearing 8, and is interference fit with the inner ring of the bearing 8, while the first end of the test input shaft 41 is fixed to the input shaft positioning plate 7 by bolts. An outer gear ring meshing with the planetary gear in the reducer 4 is provided on the side wall of the test input shaft 41 near the second end.

[0046] In this embodiment, the servo motor 2 can control the torque output by the motor, and the servo motor 2 provides torque to the output disk of the reducer 4 through the output disk connector 5. The measuring member 6 obtains the rotation angle of the output end of the reducer 4 by measuring the rotation angle of the output disk connector 5. When the output shaft torque and the rotation angle are obtained, the hysteresis curve of the reducer can be obtained.

[0047] In this embodiment, the end of the test input shaft 41 close to the output disk connector 5 is fixed to the output disk connector 5 through the bearing 8. The above design realizes the simultaneous limit of both ends of the test input shaft 41, avoids the swing of the test input shaft 41 when subjected to torque, and improves the accuracy of obtaining the hysteresis curve. In this embodiment, the bearing 8 is an outer ring type needle roller bearing.

[0048] Since the driving force generated by the servo motor 2 is limited, as a further improvement of the present invention, a gear box 9 is also provided, through which the torque of the servo motor 2 is transmitted. The input shaft of the gear box 9 is connected and fixed to the rotating shaft of the servo motor 2 through a diaphragm coupling 21. Connecting the gear box 9 and the servo motor 2 through the diaphragm coupling 21 can achieve gapless rotation between the two, thereby improving the transmission accuracy. The output shaft of the gear box 9 drives the output disk connector 5. The setting of the gear box 9 can effectively amplify the torque transmitted by the motor 2, so as to better use different reducers 4, and thus can also reduce the power output of the motor 2.

[0049] like Figure 6-7 As shown, in this embodiment, the measuring part 6 is a digital display angle meter, which is composed of a high-precision angle ruler and an electronic recorder. It is different from the angle encoder on the market, which records two sets of electrical signal pulses with a phase difference of 90 degrees to achieve the recording angle. The digital display angle meter of this embodiment has a measurement range of 0 to 360° and can measure in the clockwise and counterclockwise directions. The main structure of the specific measuring part 6 is divided into two parts: a stator 61 and a rotor 62. A scale code disk is connected between the rotor 62 and the stator 61. The function of the scale code disk is to record the rotation angle of the rotor 62 relative to the stator 61, and then transmit it to the main control box through an electrical signal.

[0050] The output shaft of the gearbox 9 is connected to the first end of the output disc connector 5 through the rotor 62; the stator 61 is fixed on the housing 91 of the gearbox 9. The rotor 62 is used as a connector during the driving process between the gearbox 9 and the output disc connector 5. The rotor 62 is directly used for torque transmission. The rotation angle of the output disc connector 5 during the torque process can be more accurately obtained by connecting the rotor 62 to the output disc connector 5. The rotor 62 and the stator 61 generate relative rotation. When the rotor 62 is connected and fixed to the output shaft of the gearbox 9, the stator 61 needs to be fixedly mounted on the housing of the gearbox 9.

[0051] In order to facilitate the installation and fixation of the rotor 62, a clamping sleeve structure is provided at both ends of the rotor 62. The setting of the clamping sleeve structure can make the rotor 62 directly clamped and connected with the output shaft of the gear box 9 and the output connecting shaft 5, avoiding the use of a coupling in the process of connecting the rotor 62 with the gear box 9, and also avoiding the use of a coupling in the process of connecting the rotor 62 with the output connecting shaft 5. The stator 61 is provided with a threaded hole connected to the housing 91 of the gear box 9, and the stator 61 is fixed to the housing 91 by screws.

[0052] Specifically, the clamping sleeve structure is a clamp structure, and the first end of the rotor 62 is provided with a first clamp 621 adapted to the output shaft of the gear box 9, and the second end of the rotor 62 is provided with a second clamp 622 adapted to the first end of the output disc connector 5. By connecting the rotor 62 and the gear box 9 or the output disc connector 5 through the clamp, it can be adjusted according to the size of the output shaft of the gear box 9 or the output disc connector 5, thereby improving the adaptability of the rotor 62. At the same time, the measurement component 6 is installed and fixed by the clamp, which also facilitates the disassembly and assembly of the measurement component 6.

[0053] In this embodiment, the output disk connector 5 includes a connection disk 51 and a connection shaft 52 vertically fixed on the connection disk 51. The connection disk 51 is connected and fixed to the output disk of the reducer 4. The servo motor 2 drives the connection shaft 52 to rotate. In this embodiment, the connection shaft 52 is connected and fixed to the second clamp 622 of the rotor 62. A bearing mounting hole 50 is provided on the connection disk 51, and the outer ring of the bearing 8 is interference-fitted in the bearing mounting hole 50. The test input shaft 41 is interference-fitted with the inner ring of the bearing 8.

[0054] Since the gearbox 9 and the output disk connector 5 are connected through the rotor 62, in order to facilitate the connection and fixation of the gearbox 9, the output disk connector 5 and the rotor 62, the reducer mounting frame 3 is slidably mounted on the platform 1, the gearbox 9 is mounted and fixed on the platform 1, and the reducer 4 is mounted and fixed on the reducer mounting frame 3, so the reducer 4 moves closer to or away from the gearbox 9 on the platform 1 as the reducer mounting frame 3 slides. In the process of installing the rotor 62, the reducer mounting frame 3 is first moved in the direction away from the gearbox 9, and the first end of the rotor 62 is first mounted and fixed on the connecting shaft 52 on the output disk connector 5, and then the rotor 62 and the reducer mounting frame 3 are moved together in the direction of the gearbox 9 so that the second end of the rotor 62 is connected and fixed to the gearbox 9. After the gearbox 9 and the output disk connector 5 are mounted and fixed through the rotor 62, the reducer mounting frame 3 is locked and fixed on the platform 1 through the locking member 322.

[0055] In this embodiment, the stand 1 is a welded assembly, and the stand 1 is used to support the entire device. The reducer mounting frame 3 includes a support frame 31 for fixing the reducer 4 and a bottom plate 32 fixedly connected to the support frame 31, and the bottom plate 32 is slidably matched with the stand 1. The support frame 31 is vertically fixed on the bottom plate 32, and a reinforced sheet metal part is also provided between the support frame 31 and the bottom plate 32 to improve the firmness of the entire reducer mounting frame 3.

[0056] Specifically, the stand 1 is provided with a first slide rail 11, and the bottom plate 32 is provided with a first slider 321 that slides with the first slide rail 11. Two first slide rails 11 are provided, and the two first slide rails 11 can ensure the stability of the bottom plate 32 during the sliding process on the stand 1.

[0057] In this embodiment, the locking member 322 is disposed on the bottom plate 32 , and the locking member 322 includes a locking handle 323 and a locking screw 324 . A threaded hole matching the locking screw 324 is disposed on the bottom plate 32 .

[0058] The first end of the locking screw 324 is connected and fixed to the locking handle 323, and the locking handle 33 is used to facilitate the screwing of the locking screw 324. The second end of the locking screw 324 is provided with the threaded hole and freely extends in the direction of the stand 1. When the locking screw 324 is screwed by the locking handle 323, the locking screw 324 moves up and down in the threaded hole. When the second end of the locking screw 324 moves downward to abut against the stand 1, the bottom plate 32 is locked and fixed. In order to better lock and fix the bottom plate 32, a locking block is installed and fixed at the second end of the locking screw 324.

[0059] Furthermore, the stand 1 is also provided with a first stopper 12 for limiting the sliding stroke of the bottom plate 32. The first stopper 12 is used to limit the maximum stroke of the bottom plate 32 moving in a direction away from the gear box 9.

[0060] In order to facilitate the installation and fixation of the servo motor 2 and the gear box 9, the servo motor 2 is installed and fixed on the bottom plate 32 through the motor support frame 10, and the motor support frame 10 is slidably matched with the stand 1. During the installation of the servo motor 2 and the gear box 9, the servo motor 2 is first moved away from the gear box 9, and then the first end of the diaphragm coupling 21 is installed and fixed on the output shaft of the servo motor 2, and then the servo motor 2 is moved in a direction close to the gear box 9, so that the second end of the diaphragm coupling 21 is installed and fixed on the gear box 9. After the servo motor 2 is connected and fixed to the gear box 9, the floor 32 is locked and fixed with the motor support frame locking member.

[0061] Specifically, the motor support frame 10 includes a motor support plate 101 and a motor base 102, the servo motor 2 is mounted and fixed on the motor support plate 101, the motor support plate 101 is vertically fixed on the motor base 102, a second slider 1021 is provided on the motor base 102, and a second guide rail 13 is provided on the stand 1 to slide with the second slider 1021. A second blocking block 14 is provided on the motor base 102, and the second blocking block 14 is used to limit the sliding stroke of the motor base 102.

[0062] In this embodiment, the motor support frame locking member and the locking member 322 have the same structure, which will not be described in further detail.

[0063] The present invention provides a reducer hysteresis curve test platform. Taking the reducer as an example, the hysteresis curve test steps are described as follows:

[0064] Step 1: Install the bearing 8 into the bearing mounting hole 50 on the output connecting shaft 5;

[0065] Step 2: Install the output disk of the reducer 4 and the output connecting shaft 5 together, that is, fix the connecting disk 51 of the output connecting shaft 5 on the output disk of the reducer 4 with screws to form an assembly 1;

[0066] Step 3: Move the reducer mounting frame 3 to the end away from the gear box 9, and install the assembly 1 on the reducer mounting frame 3, that is, fix the housing of the reducer 4 on the reducer mounting frame with screws;

[0067] Step 4: The second end of the test input shaft 41 passes through the through hole at the center position of the input shaft fixing plate 7, is inserted into the inner ring of the bearing 8, and the test input shaft 41 is slightly rotated to connect and fix the first end of the test input shaft 41 to the input shaft fixing plate 7 with bolts;

[0068] Step 6: Install and fix the first end of the stator 61 of the measuring member 6 on the box body 91, pull the reducer mounting frame 3 close to the second end of the measuring member 6, and then connect and fix the measuring member 6 to the connecting shaft 52 of the output disk connecting member 5;

[0069] Step 7: Rotate the lockable handle 323 to make the locking screw 324 contact the upper surface of the stand 1, thereby locking the position of the reducer mounting bracket 3.

[0070] Turn on the power supply, control the torque loading through the servo motor 2, and the torque is adjusted by the gear box 9 and transmitted to the rotor 62 of the measuring member 6 and further transmitted to the output disk connector 5 through the rotor 62. The measuring member 6 is used to record the real-time rotation angle of the output disk connector 5. The output disk connector 5 and the output disk of the reducer 4 are connected as a whole without relative rotation, that is, the measuring member 6 actually records the rotation angle of the output shaft of the reducer 4.

[0071] The angular displacement recorded by the measuring element 6 and the torque of servo motor 2 And gearbox 9 reduction ratio and transmission efficiency , the output disc rotation angle of reducer 4 can be plotted ( ) and torque( ) is the hysteresis curve.

[0072] Take the RV40 reducer as an example. The rated torque of the RV40 reducer is 412Nm. Control the servo motor 2 to slowly load in the forward direction. ≥412Nm, then slowly load in the reverse direction to ≥412Nm, record the rotation angle of the output disc of reducer 4 during the entire test process ( ) and torque( ), and finally, an accurate and complete hysteresis curve (including test data) can be obtained on the main control box panel.

[0073] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A reducer hysteresis curve test platform, characterized in that: It includes a platform, a reducer mounting frame arranged on the platform, a reducer, an output disk connecting member fixed to the output disk of the reducer, a measuring member for obtaining the rotation angle of the output disk connecting member, and a driving mechanism for providing torque to the output disk connecting member; The reducer is mounted on the reducer mounting frame, and a test input shaft is provided on the reducer, a first end of the test input shaft is fixedly connected to the reducer mounting frame through an input shaft positioning plate; a second end of the test input shaft is fixed to the output disk connecting member through a bearing; The reducer is an RV reducer, a through hole for the test input shaft to pass through is provided at the center position of the input shaft positioning plate, the second end of the test input shaft passes through the through hole and is inserted into the inner ring of the bearing, the second end of the test input shaft is interference fit with the inner ring of the bearing, and the first end of the test input shaft is fixed to the input shaft positioning plate by bolts; The measuring member is a digital display inclinometer, and the torque applied by the driving mechanism to the output disk connecting member is transmitted through the measuring member.

2. The reducer hysteresis curve test platform according to claim 1, characterized in that: The driving mechanism includes a servo motor and a gear box arranged on the stand; The input shaft of the gear box is connected to the rotating shaft of the servo motor, and the output shaft of the gear box is connected and fixed to the measuring piece.

3. The reducer hysteresis curve testing platform according to claim 2, characterized in that: The gear box and the rotating shaft of the servo motor are connected and fixed via a diaphragm coupling.

4. The reducer hysteresis curve test platform according to claim 2, characterized in that: The measuring member comprises a stator, a rotor rotatably matched with the stator, and a scale code disk for recording the rotation angles of the stator and the rotor; the scale code disk is arranged between the stator and the rotor; The output shaft of the gearbox is connected to the first end of the output disc connector through the rotor; The stator is fixed on the housing of the gear box.

5. The reducer hysteresis curve testing platform according to claim 4, characterized in that: The first end of the rotor is provided with a first clamping member matched with the output shaft of the gear box, and the second end of the rotor is provided with a second clamping member matched with the first end of the output disk connecting member.

6. The reducer hysteresis curve testing platform according to claim 2, characterized in that: The reducer mounting frame includes a support frame for fixing the reducer and a base plate fixedly connected to the support frame. The base plate is slidably matched with the stand, and the base plate slides on the stand to approach or move away from the gear box.

7. The reducer hysteresis curve testing platform according to claim 6, characterized in that: The stand is provided with a first slide rail, and the bottom plate is provided with a first sliding block which is slidably matched with the first slide rail.

8. The reducer hysteresis curve testing platform according to claim 6, characterized in that: The bottom plate is also provided with a locking member for locking the position of the bottom plate. The locking member comprises a locking handle and a locking screw, and the bottom plate is provided with a threaded hole matched with the locking screw; The first end of the locking screw is connected and fixed to the locking handle, and the second end of the locking screw passes through the threaded hole and freely extends in the direction of the stand.

9. The reducer hysteresis curve testing platform according to claim 6, characterized in that: The stand is also provided with a first blocking block for limiting the sliding travel of the bottom plate.

10. The reducer hysteresis curve testing platform according to claim 6, characterized in that: The servo motor is mounted and fixed on the bottom plate via a motor support frame, and the motor support frame is slidably matched with the platform.

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