Motor rotor shaft clearance tester

Abstract

This utility model relates to the field of motors and discloses a motor rotor shaft clearance tester, including an upper positioning assembly for positioning the motor to prevent relative displacement during clamping; a telescopic assembly for conveying and positioning the motor during testing; a lower positioning assembly for bearing and stabilizing the motor; a right-side sliding assembly for initializing the motor rotor shaft to zero position; and a left-side sliding assembly for measuring the clearance of the motor rotor shaft. The clearance measurement employs an optical measurement method. The left-side sliding assembly is equipped with a pressure head with an optical path groove, providing an optical path channel for the optical measurement method while avoiding damage to the rotor shaft end and rotor bearing. This solution offers high accuracy in rotor shaft clearance testing, significantly improved automation efficiency compared to manual methods, good testing stability, and avoids the uncertainties caused by human factors.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor rotor shaft clearance tester. Background Technology

[0002] The motor consists of a housing and a stator and rotor. The rotor is connected to rotor shafts at both ends. After initial installation, axial clearance will be present between the housing and the bearings inside the rotor, causing the rotor to wobble within the housing. During motor operation, the rotor rotates at high speed, and the clearance between the rotor and housing will cause abnormal noise and vibration under high-speed rotation; long-term use will reduce the motor's lifespan. Therefore, it is necessary to assign a specialist to test the rotor shaft clearance and reduce it using filler material. Due to the complexity of the operation, workers spend a considerable amount of time on this step, and it is impossible to completely eliminate the rotor shaft clearance without ensuring that the bearings are not under stress after assembly. Furthermore, manual operation relies on experience, resulting in poor consistency in the adjusted motor.

[0003] There is an urgent market need for a motor rotor shaft clearance tester that can quickly and non-destructively locate the motor and detect the clearance distance, enabling workers to quickly and easily obtain the motor rotor shaft clearance and perform clearance filling operations based on the clearance data obtained from the test. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention provides a motor rotor shaft clearance tester.

[0005] A motor rotor shaft clearance tester, comprising,

[0006] The upper positioning assembly provides the basic frame for the motor rotor shaft clearance tester, and is used to position the motor to prevent relative displacement during the motor clamping process during testing.

[0007] The telescopic assembly, used for conveying and positioning during motor testing, is located below the upper positioning assembly;

[0008] The lower positioning assembly, used for bearing and stabilizing the motor, is mounted on the telescopic assembly;

[0009] The right-side sliding assembly, used to initialize the motor rotor shaft to a zero position, is located on one side of the telescopic assembly;

[0010] The left sliding assembly, used for measuring the clearance of the motor rotor shaft, is located on the other side of the telescopic assembly.

[0011] Furthermore, the upper positioning assembly includes a base, which serves as the mounting foundation for each assembly.

[0012] Multiple support columns are provided on the base;

[0013] The top of the supporting column is provided with a top plate;

[0014] A sliding plate is provided between the base and the top plate, and the sliding plate is slidably connected to the support column via a linear bearing.

[0015] An upper cylinder is connected to the top plate, and the upper cylinder is connected to the sliding plate.

[0016] Furthermore, an upper positioning fixture is connected to the sliding plate;

[0017] An adjustment block is provided between the upper positioning fixture and the sliding plate, and the adjustment block can easily adjust the upper positioning fixture;

[0018] A proximity sensor is also provided on one side of the positioning fixture to distinguish different models of motors and achieve multiple uses in one machine.

[0019] Furthermore, the telescopic assembly is mounted on the base, including a mounting strip mounted on the base; the mounting strip is configured as two strips, a guide rail is provided on the mounting strip, a slider is slidably connected to the guide rail, and a movable plate is provided on the slider;

[0020] An active cylinder is provided below the moving plate, which is used to provide power to the moving plate and drive the moving plate forward and backward.

[0021] A tooling positioning plate is provided on one side of the movable plate, and the tooling positioning plate is used to position the lower positioning assembly.

[0022] Furthermore, a side-blocking cylinder is also provided on the base; the side-blocking cylinder is located on one side of the moving plate to accurately and stably position the moving plate, and prevents the movement of the moving plate from causing test errors or deviations when performing clearance tests on the motor rotor shaft.

[0023] Furthermore, the lower positioning assembly is mounted on the telescopic assembly;

[0024] The lower positioning assembly includes a lower positioning base plate that is detachably and fixedly connected to the movable plate, and a lower positioning tooling base plate is provided on the lower positioning base plate;

[0025] A lower positioning baffle is provided on one side of the lower positioning fixture base plate; the lower positioning baffle is used to limit the position of the motor.

[0026] The lower positioning fixture base plate is provided with side support blocks and side stops on the other two sides.

[0027] The side support block is used to support the motor.

[0028] The side stop is used to limit the axial movement of the motor.

[0029] A handle is provided on the lower positioning assembly to facilitate the replacement and adjustment of the lower positioning assembly.

[0030] Furthermore, a buffer mounting bracket is provided on the base, and a buffer is provided on the buffer mounting bracket. The buffer is used for the movement buffer and movement limit of the moving plate.

[0031] Furthermore, the right-side sliding assembly is mounted on the upper positioning assembly;

[0032] This includes a right-side bracket mounted on the base; a right-side mounting plate is mounted on the side of the right-side bracket facing the telescopic assembly.

[0033] A right servo motor is mounted on the right mounting plate. The right servo motor drives the right drive screw through a right synchronous belt. The right servo motor is connected to the right mounting plate through a right motor mount.

[0034] The right drive screw is mounted on the right mounting plate via two bearing seats.

[0035] A right slide rail is provided on the right mounting plate, and a right slide block is provided on the right slide rail;

[0036] A pressure sensor is installed on the right slide block. The pressure sensor is used to push the motor rotor shaft to initialize the motor rotor shaft to zero position, preventing the rotor shaft from moving too fast or being subjected to excessive pressure, which could cause damage to the rotor shaft or bearings or result in inaccurate testing.

[0037] The right drive screw is connected to the right slide via the right connecting plate, thereby driving the movement of the pressure sensor.

[0038] Furthermore, the left sliding assembly is also provided on the left side of the upper positioning assembly;

[0039] This includes a left mounting plate fixedly connected to the base; a left servo motor is mounted on the left mounting plate.

[0040] The left servo motor is fixed to the left mounting plate by the left motor mount.

[0041] The left servo motor provides power to the left drive screw via the left synchronous belt.

[0042] The left mounting plate is provided with multiple support columns.

[0043] The support column supports the left sliding support plate.

[0044] A left slide rail is installed on the left sliding support plate, and a left slide block is installed on the left slide rail; a pressure head is installed on the left slide block, and a pressure sensor is connected to the pressure head to prevent the pressure head from squeezing and damaging the rotor shaft or bearing. When a certain pressure is reached, it indicates that the rotor shaft has moved into place, and the pressure is stopped. The pressure sensor can change the preset value when changing models to facilitate the testing of various motors of different models.

[0045] Furthermore, the main body of the pressure head is a cylinder, and an optical path groove is provided on the pressure head. The optical path groove is located on the arc side of the cylinder and penetrates the cylinder.

[0046] A displacement sensor is also provided on the left mounting plate; the displacement sensor is an optical sensor and is located on one side of the optical path groove.

[0047] The optical path groove of the pressure head can accommodate the end of the rotor shaft. The end of the pressure head applies pressure between the shafts, driving the rotor shaft to move.

[0048] The above-described one or more technical solutions in the embodiments of this utility model have at least one of the following technical effects:

[0049] 1. Through reasonable tooling design and structural optimization, the motor rotor shaft clearance tester of this application has the advantage of modularity, and can be adapted to various models of motor testing by changing modules.

[0050] 2. Through the cooperation of various assemblies, the stability of measuring the motor rotor shaft clearance is improved, and the accuracy of the clearance data is increased by the automated measurement method of the tester.

[0051] 3. Effectively reduces the operational difficulty for operators in this step, avoiding the inability of operators to accurately determine the clearance between the motor housing and the bearing, and the need for repeated manual padding tests, which wastes production time.

[0052] 4. By accurately measuring the rotor shaft clearance, avoid insufficient or excessive filling material inside the motor. Insufficient material will cause the bearing to vibrate and make abnormal noise, while excessive material will cause the bearing to be under stress inside the motor, resulting in a large load on the bearing during rotation and reducing the lifespan of the motor.

[0053] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the overall structure of the motor rotor shaft clearance tester of this utility model;

[0056] Figure 2 This is a schematic diagram of the upper positioning assembly of the motor rotor shaft clearance tester of this utility model;

[0057] Figure 3 This is a schematic diagram of the telescopic assembly of the motor rotor shaft clearance tester of this utility model;

[0058] Figure 4 This is a schematic diagram of the lower positioning assembly of the motor rotor shaft clearance tester of this utility model;

[0059] Figure 5 This is a schematic diagram of the right sliding assembly of the motor rotor shaft clearance tester of this utility model;

[0060] Figure 6 This is a schematic diagram of the left sliding assembly of the motor rotor shaft clearance tester of this utility model;

[0061] Figure 7 This is a schematic diagram of the pressure head of the motor rotor shaft clearance tester of this utility model.

[0062] in:

[0063] 1. Upper positioning assembly; 1-1. Base; 1-2. Support column; 1-3. Top plate; 1-4. Sliding plate; 1-5. Upper positioning fixture; 1-6. Proximity sensor; 1-7. Upper cylinder; 1-8. Adjusting block; 1-9. Linear bearing; 1-10. Buffer mounting bracket;

[0064] 2. Telescopic assembly; 2-1. Mounting strip; 2-2. Guide rail; 2-3. Slider; 2-4. Moving plate; 2-5. Tooling positioning plate; 2-6. Active cylinder; 2-7. Side stop cylinder;

[0065] 3. Lower positioning assembly; 3-1. Lower positioning base plate; 3-2. Lower positioning fixture base plate; 3-3. Lower positioning baffle; 3-4. Side support block; 3-5. Side stop block; 3-6. Handle;

[0066] 4. Right sliding assembly; 4-1. Right bracket; 4-2. Right mounting plate; 4-3. Right motor mount; 4-4. Right servo motor; 4-5. Right synchronous belt; 4-6. Bearing housing; 4-7. Right drive screw; 4-8. Right slide rail; 4-9. Right slide block; 4-10. Pressure sensor; 4-11. Right connecting plate;

[0067] 5. Left sliding assembly; 5-1. Left mounting plate; 5-2. Left motor mount; 5-3. Left servo motor; 5-4. Left synchronous belt; 5-5. Support column; 5-6. Left sliding support plate; 5-7. Left slide rail; 5-8. Left slide block; 5-9. Displacement sensor; 5-10. Left drive screw; 5-11. Pressure head; 5-12. Optical path groove; 6. Emergency stop button; 7. Start switch. Detailed Implementation

[0068] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The following embodiments are used to illustrate this utility model but should not be used to limit its scope.

[0069] like Figure 1 The figure shows the overall structure of the motor rotor shaft clearance tester.

[0070] A motor rotor shaft clearance tester, comprising,

[0071] The upper positioning assembly 1 provides a basic frame for the motor rotor shaft clearance tester, which is used to position the motor so that no relative displacement occurs during the clamping process of the motor during testing.

[0072] Telescopic assembly 2, used for conveying and positioning during motor testing, is located at the lower part of upper positioning assembly 1;

[0073] The lower positioning assembly 3 is used for bearing and stabilizing the motor and is mounted on the telescopic assembly 2;

[0074] The right sliding assembly 4 is used to initialize the motor rotor shaft to zero position and is located on one side of the telescopic assembly 2;

[0075] The left sliding assembly 5 is used for measuring the gap of the motor rotor shaft and is located on the other side of the telescopic assembly 2. The gap measurement adopts an optical measurement method, which avoids the problem of poor stability of manual operation and can also improve the measurement accuracy.

[0076] like Figure 2As shown, the structure of the upper positioning assembly of the motor rotor shaft clearance tester is illustrated.

[0077] The upper positioning assembly 1 includes a base 1-1 that serves as the mounting base for each assembly.

[0078] Multiple supporting columns 1-2 are provided on the base 1-1;

[0079] A top plate 1-3 is provided on the top of the supporting column 1-2;

[0080] A sliding plate 1-4 is provided between the base 1-1 and the top plate 1-3; the sliding plate 1-4 is slidably connected to the support column 1-2 through a linear bearing 1-9.

[0081] An upper cylinder 1-7 is connected to the top plate 1-3, and the upper cylinder 1-7 is connected to the sliding plate 1-4.

[0082] The upper positioning fixture 1-5 is connected to the sliding plate 1-4;

[0083] An adjustment block 1-8 is provided between the upper positioning fixture 1-5 and the sliding plate 1-4. The adjustment block 1-8 can easily adjust the upper positioning fixture 1-5 to increase the applicability of the testing equipment and facilitate the debugging operation when different upper positioning fixtures 1-5 are clamped when testing different motors.

[0084] On one side of the upper positioning fixture 1-5, proximity sensors 1-6 are also installed to distinguish different types of motors, enabling one machine to serve multiple purposes. They can detect the motor position and prevent damage to the motor from excessive impact.

[0085] like Figure 3 The diagram shows the structure of the telescopic assembly of the motor rotor shaft clearance tester.

[0086] A telescopic assembly 2 is installed on the base 1-1, including a mounting strip 2-1 installed on the base 1-1; the mounting strip 2-1 is configured as two strips, a guide rail 2-2 is provided on the mounting strip 2-1, a slider 2-3 is slidably connected on the guide rail 2-2, and a movable plate 2-4 is provided on the slider 2-3;

[0087] An active cylinder 2-6 is provided below the movable plate 2-4. The active cylinder 2-6 is used to provide power to the movable plate 2-4 and drive the movable plate 2-4 to move forward and backward.

[0088] A tooling positioning plate 2-5 is provided on one side of the movable plate 2-4; the tooling positioning plate 2-5 is used for positioning the lower positioning assembly 3.

[0089] A side-blocking cylinder 2-7 is also provided on the base 1-1; the side-blocking cylinder 2-7 is located on one side of the moving plate 2-4 and is used to fix the moving plate 2-4. When the clearance test of the motor rotor shaft is performed, the movement of the moving plate 2-4 is prevented from causing test errors or deviations.

[0090] like Figure 4 As shown, the structure of the lower positioning assembly of the motor rotor shaft clearance tester is illustrated.

[0091] A lower positioning assembly 3 is installed on the movable plate 2-4; including a lower positioning base plate 3-1 that is detachably and fixedly connected to the movable plate 2-4; and a lower positioning tooling base plate 3-2 is provided on the lower positioning base plate 3-1.

[0092] A lower positioning baffle 3-3 is provided on one side of the lower positioning fixture base plate 3-2; the lower positioning baffle 3-3 is used to limit the position of the motor.

[0093] The other two sides of the lower positioning fixture base plate 3-2 are provided with side support blocks 3-4 and side stops 3-5; the side support blocks 3-4 are used to support the motor, and the side stops 3-5 are used to limit the axial movement of the motor.

[0094] A handle 3-6 is provided on the lower positioning assembly 3 to facilitate the replacement and adjustment of the lower positioning assembly 3.

[0095] A buffer mounting bracket 1-10 is also provided on the base 1-1; a buffer is provided on the buffer mounting bracket 1-10. The buffer is used for buffering and limiting the movement of the moving plate 2-4.

[0096] like Figure 5 As shown, the structure of the right sliding assembly of the motor rotor shaft clearance tester is illustrated.

[0097] The right-side sliding assembly 4 is installed on the base 1-1;

[0098] Includes a right-side bracket 4-1 mounted on the base 1-1; a right-side mounting plate 4-2 is mounted on the side of the right-side bracket 4-1 facing the telescopic assembly 2;

[0099] A right servo motor 4-4 is mounted on the right mounting plate 4-2; the right servo motor 4-4 drives the right drive screw 4-7 through the right synchronous belt 4-5; the right servo motor 4-4 is connected to the right mounting plate 4-2 through the right motor mount 4-3.

[0100] The right drive screw 4-7 is mounted on the right mounting plate 4-2 via two bearing seats 4-6.

[0101] A right slide rail 4-8 is provided on the right mounting plate 4-2; a right slide block 4-9 is provided on the right slide rail 4-8;

[0102] A pressure sensor 4-10 is installed on the right slide block 4-9; the pressure sensor 4-10 is used to push the motor rotor shaft to initialize the motor rotor shaft to zero position, and prevent the rotor shaft from moving too fast or being subjected to excessive pressure, which could cause damage to the rotor shaft or bearings or result in inaccurate testing.

[0103] The right drive screw 4-7 is connected to the right slide 4-9 via the right connecting plate 4-11, thereby driving the movement of the pressure sensor 4-10.

[0104] like Figure 6 As shown, the structure of the left sliding assembly of the motor rotor shaft clearance tester is illustrated.

[0105] like Figure 7 The diagram shows the structure of the pressure head of the motor rotor shaft clearance tester.

[0106] A left-side sliding assembly 5 is also provided on the left side of the base 1-1;

[0107] Includes a left mounting plate 5-1 fixedly connected to the base 1-1; a left servo motor 5-3 is provided on the left mounting plate 5-1;

[0108] The left servo motor 5-3 is fixed to the left mounting plate 5-1 via the left motor mount 5-2.

[0109] The left servo motor 5-3 provides power to the left drive screw 5-10 via the left synchronous belt 5-4.

[0110] Multiple support columns 5-5 are provided on the left mounting plate 5-1; the support columns 5-5 support the left sliding support plate 5-6;

[0111] A left slide rail 5-7 is installed on the left sliding support plate 5-6; a left slide block 5-8 is installed on the left slide rail 5-7; a pressure head 5-11 is installed on the left slide block 5-8, and a pressure sensor 4-10 is also connected to the pressure head 5-11 to prevent the pressure head 5-11 from squeezing and damaging the rotor shaft or bearing. When a certain pressure is reached, it indicates that the rotor shaft has moved into place and the pressure is stopped.

[0112] The pressure sensor can change preset values ​​during model changeovers, making it easy to test various motors of different models.

[0113] The pressure head 5-11 is a cylindrical body. An optical path groove 5-12 is provided on the pressure head 5-11. The optical path groove 5-12 is located on the arc side of the cylinder and penetrates the cylinder.

[0114] A displacement sensor 5-9 is also provided on the left mounting plate 5-1; the displacement sensor 5-9 is an optical sensor and is located on one side of the optical path groove 5-12.

[0115] The purpose of setting the optical path groove 5-12 on the pressure head 5-11 is not only to provide a channel for the test light of the displacement sensor 5-9, but also to reduce or avoid damage to the rotor shaft.

[0116] Because the rotor shaft has threads at the end for installation and is relatively thin, it is easily damaged.

[0117] The optical path groove 5-12 of the pressure head 5-11 can accommodate the end of the rotor shaft, and then the end of the pressure head 5-11 is used to apply pressure to the shaft, drive the movement of the rotor shaft, and perform rotor shaft clearance testing. This not only avoids potential damage to the rotor shaft end and rotor bearing, but also provides a more stable driving force for the rotor shaft, improving the stability of the test.

[0118] When in use, place the motor on the lower positioning fixture base plate 3-2 and the side support block 3-4 of the lower positioning assembly 3, and adjust the motor to be close to the side stop block 3-5.

[0119] Then, both start switches 7 are activated simultaneously, and the active cylinders 2-6 are started. The motor is transported to the predetermined position via PLC configuration, and the buffer prevents damage from emergency stop.

[0120] At the same time, the upper cylinder 1-7 is controlled by the PLC to move downward from fast to slow, so that the upper positioning fixture 1-5 contacts the upper end of the motor.

[0121] At this time, the left sliding assembly 5 and the right sliding assembly 4 receive signals from the proximity sensors 1-6.

[0122] The pressure sensor 4-10 of the right sliding assembly 4 applies pressure to the rotor shaft. When the pressure value obtained by the pressure sensor 4-10 reaches the predetermined value, it indicates that the rotor shaft has been adjusted to the zero position. The displacement sensor 5-9 obtains the first parameter, and the pressure sensor 4-10 retracts.

[0123] The pressure head 5-11 of the left sliding assembly 5 applies pressure to the rotor shaft, causing the rotor shaft to move. When the preset pressure value is reached, it indicates that the rotor shaft has moved into place. The displacement sensor 5-9 acquires the second parameter, and the pressure head 5-11 retracts.

[0124] After measurement, the left sliding assembly 5 and right sliding assembly 4 move away from the motor, and the upper positioning fixture 1-5 moves upward to complete the reset. Finally, the lower positioning assembly 3 moves towards the operator. After the equipment completes the test, the operator removes the motor. After placing the filling material, a re-inspection is performed, and the above operations are repeated. In case of emergency, the emergency stop button 6 can be pressed to reset all assemblies.

[0125] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electrical machine rotor shaft gap tester characterized by, include, The upper positioning assembly provides the basic frame for the motor rotor shaft clearance tester, and is used to position the motor to prevent relative displacement during the motor clamping process during testing. The telescopic assembly, used for conveying and positioning during motor testing, is located below the upper positioning assembly; The lower positioning assembly, used for bearing and stabilizing the motor, is mounted on the telescopic assembly; The right-side sliding assembly, used to initialize the motor rotor shaft to a zero position, is located on one side of the telescopic assembly; The left sliding assembly, used for measuring the clearance of the motor rotor shaft, is located on the other side of the telescopic assembly.

2. The motor rotor shaft clearance tester according to claim 1, characterized in that, The upper positioning assembly includes a base, which serves as the mounting base for each assembly. Multiple support columns are provided on the base; The top of the supporting column is provided with a top plate; A sliding plate is provided between the base and the top plate, and the sliding plate is slidably connected to the support column via a linear bearing. An upper cylinder is connected to the top plate, and the upper cylinder is connected to the sliding plate.

3. The motor rotor shaft clearance tester according to claim 2, characterized in that, An upper positioning fixture is connected to the sliding plate; An adjustment block is provided between the upper positioning fixture and the sliding plate, and the adjustment block can easily adjust the upper positioning fixture; A proximity sensor is also provided on one side of the positioning fixture to distinguish different types of motors, enabling one machine to serve multiple purposes.

4. The motor rotor shaft clearance tester according to claim 2, characterized in that, The telescopic assembly is mounted on a base and includes a mounting strip mounted on the base; the mounting strip is provided with two strips, a guide rail is provided on the mounting strip, a slider is slidably connected to the guide rail, and a movable plate is provided on the slider; An active cylinder is provided below the moving plate, which is used to provide power to the moving plate and drive the moving plate forward and backward. A tooling positioning plate is provided on one side of the movable plate, and the tooling positioning plate is used to position the lower positioning assembly.

5. The motor rotor shaft clearance tester according to claim 4, characterized in that, A side-blocking cylinder is also provided on the base; the side-blocking cylinder is located on one side of the moving plate and is used to accurately and stably position the moving plate, so as to prevent the movement of the moving plate from causing test errors or deviations when the motor rotor shaft is tested for clearance.

6. The motor rotor shaft clearance tester according to claim 4, characterized in that, The lower positioning assembly is mounted on the telescopic assembly; The lower positioning assembly includes a lower positioning base plate that is detachably and fixedly connected to the movable plate, and a lower positioning tooling base plate is provided on the lower positioning base plate; A lower positioning baffle is provided on one side of the lower positioning fixture base plate; the lower positioning baffle is used to limit the position of the motor. The lower positioning fixture base plate is provided with side support blocks and side stops on the other two sides. The side support block is used to support the motor. The side stop is used to limit the axial movement of the motor. A handle is provided on the lower positioning assembly to facilitate the replacement and adjustment of the lower positioning assembly.

7. The motor rotor shaft clearance tester according to claim 4, characterized in that, A buffer mounting bracket is also provided on the base, and a buffer is provided on the buffer mounting bracket. The buffer is used for the movement buffer and movement limit of the moving plate.

8. The motor rotor shaft clearance tester according to claim 2, characterized in that, The right sliding assembly is mounted on the upper positioning assembly; This includes a right-side bracket mounted on the base; a right-side mounting plate is mounted on the side of the right-side bracket facing the telescopic assembly. A right servo motor is mounted on the right mounting plate. The right servo motor drives the right drive screw through a right synchronous belt. The right servo motor is connected to the right mounting plate through a right motor mount. The right drive screw is mounted on the right mounting plate via two bearing seats. A right slide rail is provided on the right mounting plate, and a right slide block is provided on the right slide rail; A pressure sensor is installed on the right slide block. The pressure sensor is used to push the motor rotor shaft to initialize the motor rotor shaft to zero position, preventing the rotor shaft from moving too fast or being subjected to excessive pressure, which could cause damage to the rotor shaft or bearings or result in inaccurate testing. The right drive screw is connected to the right slide via the right connecting plate, thereby driving the movement of the pressure sensor.

9. The motor rotor shaft clearance tester according to claim 2, characterized in that, The left sliding assembly is also provided on the left side of the upper positioning assembly; This includes a left mounting plate fixedly connected to the base; a left servo motor is mounted on the left mounting plate. The left servo motor is fixed to the left mounting plate by the left motor mount. The left servo motor provides power to the left drive screw via the left synchronous belt. The left mounting plate is provided with multiple support columns. The support column supports the left sliding support plate. A left slide rail is installed on the left sliding support plate, and a left slide block is installed on the left slide rail; a pressure head is installed on the left slide block, and a pressure sensor is connected to the pressure head to prevent the pressure head from squeezing and damaging the rotor shaft or bearing. When a certain pressure is reached, it indicates that the rotor shaft has moved into place, and the pressure is stopped. The pressure sensor can change the preset value when changing models to facilitate the testing of various motors of different models.

10. The motor rotor shaft clearance tester according to claim 9, characterized in that, The pressure head body is a cylinder, and an optical path groove is provided on the pressure head. The optical path groove is located on the arc side of the cylinder and penetrates the cylinder. A displacement sensor is also provided on the left mounting plate; the displacement sensor is an optical sensor and is located on one side of the optical path groove. The optical path groove of the pressure head can accommodate the end of the rotor shaft. The end of the pressure head applies pressure between the shafts, driving the rotor shaft to move.

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