Installation method for preventing bearing micro-motion in motor

Abstract

The present application relates to the technical field of installation of bearings in motors, and in particular to a method for installing bearings in motors to prevent micro-movement. This method selects bearings with positive clearance and precisely processes the assembly surfaces of the motor stator and mover bearing seats to form clearance fit and transition fit. At the same time, annular grooves are machined on the assembly surfaces and filled with adhesive, thereby effectively solving the problem of micro-movement of the bearings, improving the stability and reliability of the motor operation, and extending the service life of the bearings.

Description

Technical Field

[0001] The present application relates to the technical field of installation of bearings in motors, and in particular to an installation method for preventing micro-movement of bearings in motors. Background Art

[0002] In the field of motor technology, especially motor manufacturing and application, with the development of industrial automation and precision manufacturing technology, motors are widely used in various precision equipment due to their high precision, high efficiency and low maintenance costs. However, during long-term operation, the micro-motion phenomenon of the internal bearings of the motor leads to a decrease in axial and radial accuracy, seriously affecting the performance and service life of the equipment. This problem has become a bottleneck restricting the further development of motors in high-precision application scenarios.

[0003] Currently, the industry has adopted a variety of approaches to address the issue of motor bearing micromotion. Common methods include: 1) using high-precision bearings to reduce micromotion by improving the manufacturing accuracy of the bearings themselves; 2) optimizing the bearing installation process, such as by adjusting the bearing preload and installation position to improve stability; 3) using special materials and coatings to enhance the wear and fatigue resistance of the bearing surface; and 4) improving motor design, such as adding support structures or changing the bearing configuration, to reduce the impact of external vibration on the bearings. While these methods can alleviate the problem of bearing micromotion to a certain extent, they still have many shortcomings in practical applications.

[0004] While the aforementioned methods can reduce bearing micromotion to a certain extent, they often fail to fundamentally resolve the problem. High-precision bearings are expensive, and even under extreme operating conditions, micromotion cannot be completely eliminated. Optimizing the installation process and material handling can improve bearing performance, but this also increases process complexity and cost. Design improvements may require redesigning the entire motor system, which is time-consuming and risky. Therefore, existing solutions still have significant room for improvement in terms of cost-effectiveness and reliability. A more effective and practical bearing installation method is urgently needed to completely resolve the issue of motor bearing micromotion. Summary of the Invention

[0005] In order to overcome the above technical problems, the present application provides an installation method for preventing bearing micro-motion in a motor. By reasonably processing the motor bearing assembly surface, the problem of bearing micro-motion is effectively solved, the stability and reliability of the motor operation are improved, and the service life of the bearing is extended.

[0006] This application is implemented using the following technical solutions:

[0007] A method for installing a motor to prevent micro-motion of a bearing, comprising:

[0008] Choose bearings with positive clearance;

[0009] According to the actual measured dimensions of the inner ring or outer ring of the bearing corresponding to the bearing assembly surface of the motor stator component, the bearing assembly surface of the motor stator component is processed so that the bearing assembly surface of the motor stator component forms a clearance fit with the inner ring or outer ring of the bearing, and an annular groove is processed on the bearing assembly surface of the stator component. The groove is used to fill the adhesive to fill the gap between the bearing assembly surface of the motor stator component and the inner ring or outer ring of the bearing;

[0010] According to the actual measured dimensions of the outer ring or inner ring on the bearing corresponding to the bearing assembly surface of the motor rotor part, the bearing assembly surface of the motor stator part is processed so that the bearing assembly surface of the motor rotor part forms a transition fit with the inner ring or outer ring of the bearing, so that during the installation process of the bearing, the bearing assembly surface of the motor rotor part forms an extrusion deformation with respect to the inner ring or outer ring of the bearing to reduce the clearance of the bearing.

[0011] By adopting the above technical solution, it is possible to effectively prevent the bearing from experiencing micro-motion during use, thereby reducing wear on the bearing inner and outer rings, the contact surface of the bearing rollers, and the mounting surfaces of parts that mate with the bearing inner and outer rings. This improves the motor's axial and radial accuracy, extending the motor's service life and precision life. Specifically, by machining an annular groove and filling it with adhesive on the assembly surface of the motor's stator bearing seat, micro-motion of the bearing that may be caused by a clearance fit is eliminated. At the same time, by performing a transition fit on the assembly surface of the motor's rotor bearing seat, the bearing's clearance is reduced to near zero, further improving the motor's operating accuracy and stability.

[0012] Optionally, the clearance value range of the bearing is 0 to k mm, the component on the bearing that cooperates with the bearing assembly surface of the motor stator part is the inner ring, and the component that cooperates with the bearing assembly surface of the motor mover part is the outer ring; the bearing assembly surface of the motor stator part is processed according to the actual size of the bearing inner ring, so that the assembly clearance between the bearing assembly surface of the motor stator part and the bearing inner ring reaches a matching accuracy of h6-h7; the bearing assembly surface of the motor mover part is processed according to the actual size D1 mm and the calibrated size D mm of the bearing outer ring, wherein the reference size of the bearing assembly surface of the motor mover part is D mm, the upper deviation is a mm, and the lower deviation is b mm, a=-(D-D1+k), b=-(a+k / 2).

[0013] By adopting this technical solution, primarily used in external rotor motors, the fit between the motor's stator bearing seat and the bearing outer ring can be precisely controlled. This ensures that the inner wall of the assembly surface produces appropriate elastic deformation against the bearing outer ring during assembly, thereby reducing bearing clearance to near zero. This effectively prevents wear caused by micro-motion in the bearing and improves the operating accuracy and service life of the DD motor. Furthermore, by controlling the fit accuracy between the motor stator bearing seat's assembly surface and the bearing inner ring to within the h6-h7 range and creating an annular groove on the assembly surface filled with adhesive, micro-motion in the bearing during operation is further prevented, enhancing bearing stability.

[0014] Optionally, the clearance value range of the bearing is 0 to k mm, the component on the bearing that cooperates with the bearing assembly surface of the motor stator part is the outer ring, and the component that cooperates with the bearing assembly surface of the motor mover part is the inner ring; the bearing assembly surface of the motor stator part is processed according to the actual size of the bearing outer ring, so that the assembly clearance between the bearing assembly surface of the motor stator part and the bearing outer ring reaches a matching accuracy of H6-H7; the bearing assembly surface of the motor mover part is processed according to the actual size D1 mm and the calibrated size D mm of the bearing inner ring, wherein the reference size of the bearing assembly surface of the motor mover part is D mm, the lower deviation is a mm, and the upper deviation is b mm; a=D-D1+k, b=a+k / 2.

[0015] By adopting this technical solution, primarily used in inner-rotor motors, the fit between the motor's stator bearing seat and the bearing outer ring can be precisely controlled, ensuring that the outer wall of the assembly surface produces appropriate elastic deformation against the bearing inner ring during assembly, thereby reducing bearing clearance to near-zero. This effectively prevents wear caused by micro-motion in the bearing and improves the motor's operating accuracy and service life. Furthermore, by controlling the fit between the motor stator bearing seat's assembly surface and the bearing outer ring to within the H6-H7 range and creating an annular groove on the assembly surface filled with adhesive, micro-motion in the bearing during operation is further prevented, enhancing bearing stability.

[0016] Optionally, the groove is a closed annular structure and is located in the middle of the bearing assembly surface of the motor stator component.

[0017] By adopting the above technical solution, the groove is set in the middle of the motor stator bearing seat assembly surface, which can distribute the glue more evenly, ensure the fluidity of the glue during the assembly process, and better fill the gap between the assembly surface and the bearing, thereby effectively reducing the probability of bearing micro-motion and improving the accuracy and service life of the motor.

[0018] Optionally, the cross-section of the groove is a rectangular structure, the width of the groove is not greater than one-fifth of the depth of the assembly surface, and the depth of the groove is set according to the usage spacing of the adhesive.

[0019] By adopting this technical solution, the grooves are rationally positioned on the assembly surface, effectively filling the adhesive and preventing micro-movement of the bearing during use. The rectangular groove design facilitates processing and manufacturing, improving production efficiency. Furthermore, the groove depth is set according to the adhesive's spacing, enhancing the bonding effect and further increasing the bearing's stability and service life.

[0020] Optionally, the groove is arranged on the stator component bearing assembly surface in a spiral structure.

[0021] By adopting this technical solution, we can effectively prevent bearing micro-motion caused by clearance fit during motor operation. The spiral groove design ensures more even distribution of adhesive during assembly. While occupying a small total assembly area, it provides a wider coverage area, allowing adhesive to fill a wider range of gaps after filling.

[0022] Optionally, the adhesive is a high-temperature resistant anaerobic adhesive.

[0023] By adopting the above-mentioned technical solution, the micro-motion phenomenon of the motor bearings during use can be effectively prevented, the axial and radial accuracy of the motor can be improved, and the service life of the motor can be extended. In particular, the use of high-temperature resistant anaerobic adhesive as a binder can maintain good bonding performance in a high-temperature environment, further enhancing the anti-micro-motion effect and ensuring that the motor can still operate stably under high-temperature conditions.

[0024] Optionally, a plurality of guide grooves are processed along the circumferential direction on the surface where the bearing contacts the groove, and the guide grooves are arranged crosswise with the groove in the assembled state.

[0025] The above technical solution effectively improves the contact between the bearing and the assembly surface. Specifically, by machining several guide grooves on the surface where the bearing contacts the groove, and by intersecting the grooves with the grooves, the fluidity and uniformity of the glue distribution can be significantly improved, thereby better filling the gap, enhancing the adhesive's bond strength, reducing the bearing's micro-motion during use, and further improving the motor's operating accuracy and service life.

[0026] Optionally, the guide groove is arranged along the axial direction of the bearing.

[0027] By adopting the above technical solution, the processing of the guide groove can be facilitated, the processing cost can be reduced, and the construction efficiency can be improved.

[0028] Optionally, based on the bearing operating temperature variation range ΔT, calculate the change in radial dimension of the motor rotor assembly surface under temperature variation ΔL to ensure that ΔL ≤ k / 2, where: ΔL = λ*L0*ΔT, ΔL is the change in length, λ is the linear coefficient of thermal expansion, L0 is the original length, and k is the maximum bearing clearance.

[0029] By adopting the above technical solution, the radial dimension changes of the motor rotor assembly surface caused by temperature changes can be effectively compensated, ensuring that the fit between the motor rotor assembly surface and the bearing is always in an ideal state under different temperature conditions, preventing the fit clearance from increasing or becoming too tight due to temperature changes, thereby reducing the probability of bearing micro-motion, improving the operating accuracy and service life of the motor, and providing a reference for the early selection of bearings.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. This invention effectively fills the gap between the assembly surface of the motor stator bearing seat and the inner or outer ring of the bearing by machining an annular groove and filling it with adhesive. This prevents micro-motion of the bearing caused by clearance fit, significantly reduces bearing wear, and improves the axial and radial accuracy of the motor.

[0032] 2. This application performs precise transition fit processing on the assembly surface of the motor rotor bearing seat, so that the assembly surface produces appropriate extrusion deformation on the inner or outer ring of the bearing during installation, reducing the bearing clearance, further enhancing the bearing stability, and improving the operating accuracy and service life of the motor;

[0033] 3. This application takes into account the thermal expansion coefficient of the material, calculates the impact of temperature changes on the assembly surface dimensions, and reasonably sets the machining tolerances of the assembly surface to ensure that the bearings maintain a good fit under different temperature conditions, thereby avoiding micro-movement and wear of the bearings caused by temperature changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 Schematic diagram of the anti-micro-motion mounting structure of the bearing in the motor in the first embodiment;

[0035] Figure 2 This is a partial schematic diagram of the anti-micro-motion mounting structure of the bearing in the motor in the first embodiment;

[0036] Figure 3 Schematic diagram of the structure of the bearing mounting surface of the stator component in the first embodiment;

[0037] Figure 4 Schematic diagram of the anti-micro-motion mounting structure of the bearing in the motor in the second embodiment;

[0038] Figure 5This is a partial schematic diagram of the anti-micro-motion mounting structure of the bearing in the motor in the second embodiment;

[0039] Figure 6 It is a structural schematic diagram of the bearing mounting surface of the stator component in the second embodiment;

[0040] Figure 7 It is a structural schematic diagram of the guide groove on the bearing in Example 2.

[0041] In the figure: 1. Stator parts; 2. Mator parts; 3. Bearing; 31. Inner ring; 32. Outer ring; 33. Roller; 34. Ball; 4. Groove; 5. Guide groove. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only possible technical implementations of the present invention and are not all possible implementations. Those skilled in the art can fully combine the embodiments of the present invention to derive other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0043] Example 1

[0044] Reference Figures 1 to 3 A method for preventing micro-movement of bearings in a motor is disclosed. The motor is in the form of an outer rotor, including a stator part 1, a bearing 3, and a mover part 2. Among them, the bearing 3 adopts a cross-roller bearing. The specific structure of the cross-roller bearing includes an inner ring 31, a roller 33 and an outer ring 32.

[0045] Before assembling the bearing 3, it is necessary to select a cross roller bearing with positive clearance, with a clearance range of 0 to k mm. Then, according to the size of the cross roller bearing, the bearing assembly surface of the motor stator part 1 and the bearing assembly surface of the motor mover part 2 are processed.

[0046] Among them, such as Figures 2-3 As shown, the bearing assembly surface of the motor stator component 1 is machined according to the actual size of the inner ring 31 of the crossed roller bearing, so that the bearing assembly surface of the motor stator component 1 forms a clearance fit with the inner ring 31. Specifically, the machining and fitting accuracy of the bearing assembly surface of the motor stator component 1 corresponding to the inner ring 31 should reach the H6-H7 level. In addition, to prevent micro-movement of the bearing 3 due to clearance fit during operation, it is necessary to machine a closed annular groove 4 on the bearing assembly surface of the motor stator component for filling with adhesive to fill the assembly gap.

[0047] The adhesive used in this embodiment is a high-temperature resistant anaerobic adhesive, such as Loctite 648 glue. During the assembly process, the annular groove 4 on the bearing assembly surface of the motor stator part is first filled with adhesive, and then the bearing 3 is installed; the maximum usage gap of the adhesive is 0.15 mm, so the depth of the groove 4 should match this; excess glue will be squeezed out of the bearing 3 assembly position during the assembly process, and the specific amount needs to be determined according to the size of the bearing 3 and the type of glue used; the specific processing parameters of the annular groove 4 are as follows: the cross-section of the groove 4 is a rectangular structure, the width is not more than one-fifth of the depth of the assembly surface, and the depth is set according to the usage spacing of the adhesive. In this embodiment, the adhesive uses Loctite 648 glue, then the width of the groove 4 can be set to 1 mm and the depth is 0.15 mm. This design can ensure that the adhesive is evenly distributed during the assembly process, effectively fill the gap, and prevent the bearing 3 from micro-moving.

[0048] like Figures 2-3 As shown, the bearing assembly surface of the motor mover part 2 is processed according to the actual size D1 mm and the calibrated size D mm of the outer ring 32 of the bearing 3, so that the bearing assembly surface of the motor mover part 2 and the outer ring 32 of the bearing 3 form a transition fit, so that during the installation process of the bearing 3, the bearing assembly surface of the motor mover part 2 is squeezed and deformed against the outer ring 32 of the bearing 3 to reduce the clearance of the bearing 3. Specifically, the transition fit size should be proportional to the clearance size of the bearing 3. The base size of the bearing assembly surface of the motor mover part 2 is D mm, and the upper deviation is a mm. m, the lower deviation is b mm, a=-(D-D1+k), b=-(a+k / 2); In this embodiment, the calibrated dimension D of the outer ring 32 of the bearing 3 is 41 mm, the actual measured dimension D1 is 40.995 mm, and the clearance of the bearing 3 is 0~+0.01 mm. Then the upper deviation of the transition fit dimension of the motor mover part 2 is a=-(41-40.995+0.01) mm, that is, a=0.015 mm, and the lower deviation b=-(0.015+0.005) mm, that is, b=0.02 mm. The machining dimension of the bearing assembly surface of the motor mover part 2 is

[0049] In practical applications, changes in the motor's operating temperature can affect the thermal expansion of the material. Therefore, if the bearing's operating temperature fluctuates significantly, it is necessary to calculate the change in the radial dimension of the motor's rotor assembly surface under temperature changes, ΔL, based on the bearing's operating temperature change range, ΔT. The specific calculation formula is: ΔL = λ*L0*ΔT, where ΔL is the change in length and λ is the linear coefficient of thermal expansion. The difference ΔD between the upper and lower deviations is calculated based on the machining dimensions of the motor's rotor assembly surface, ensuring that ΔL ≤ k / 2, where k is the bearing's clearance range. This design ensures that when the temperature changes, the dimensional changes of the motor's rotor assembly surface do not exceed the allowable range, thereby ensuring the normal operation of the bearing. Due to temperature changes, the bearing can also be cooled externally to control the temperature of the bearing, so that the bearing temperature is kept within a smaller range, reducing deformation and thus reducing the impact of temperature reduction on the bearing clearance after assembly.

[0050] The operating principle of this embodiment is as follows: Through the above-mentioned design, the present invention can effectively prevent the bearing 3 from micro-moving during use. Specifically, the clearance fit between the bearing assembly surface of the motor stator component 1 and the inner ring 31 of the bearing 3, combined with the use of annular groove 4 and adhesive, can effectively fill the gap and prevent the bearing 3 from micro-moving. At the same time, the transition fit between the bearing assembly surface of the motor stator component 1 and the outer ring 32 of the bearing 3 ensures that the outer ring 32 of the bearing 3 is squeezed during assembly, reducing the clearance of the bearing 3 and further preventing the bearing 3 from micro-moving. This design not only improves the operating accuracy of the motor but also extends its service life, resolving the problems existing in the prior art.

[0051] Example 2

[0052] Reference Figures 4-5 A method for preventing micro-movement of bearings in a motor is disclosed. The motor is an inner rotor type, including a stator part 1, a bearing 3, and a mover part 2. Among them, the bearing 3 adopts a deep groove ball bearing. The specific structure of the deep groove ball bearing includes an inner ring 31, balls 34 and an outer ring 32.

[0053] Before assembling the bearing 3, it is necessary to select a deep groove ball bearing with positive clearance, with a clearance range of 0 to k mm. Then, according to the size of the deep groove ball bearing 3, the bearing assembly surface of the motor stator part 1 and the bearing assembly surface of the motor mover part 2 are processed.

[0054] like Figures 4-5As shown, the bearing assembly surface of the motor stator part 1 is processed according to the actual size of the outer ring 32 of the deep groove ball bearing 3, so that the bearing assembly surface of the motor stator part 1 and the outer ring 32 form a clearance fit. Specifically, the machining and fitting accuracy of the motor stator part bearing assembly surface corresponding to the outer ring 32 of the bearing 3 should reach the H6-H7 level. In addition, in order to prevent the bearing 3 from micro-moving due to clearance fit during operation, it is necessary to process an annular groove 4 on the bearing assembly surface of the motor stator part 1 for filling with adhesive. The adhesive used in this embodiment is a high-temperature resistant anaerobic adhesive, such as Loctite 648 glue. During the assembly process, the annular groove 4 on the bearing assembly surface of the stator part 1 is first filled with adhesive, and then the bearing 3 is installed.

[0055] like Figures 5-6 As shown, in order to effectively prevent the bearing 3 from micro-moving due to clearance fit during the operation of the motor, the groove 4 in this example is arranged in a spiral. The design of the spiral groove 4 can not only better fill the glue and enhance the bonding effect of the glue, but also increase the contact area between the glue and the assembly surface, ensuring the uniform distribution of the adhesive, improving the anti-micro-motion performance, and reducing the wear of the bearing 3 during use, thereby extending the service life of the motor and maintaining higher precision; the specific processing parameters of the groove 4 are as follows: the cross-section of the groove 4 is a rectangular structure, and the depth is set according to the use spacing of the adhesive. In this embodiment, the adhesive uses Loctite 648 glue, the width of the groove 4 is set to 0.2 mm, the depth is 0.15 mm, and it goes around 5 turns. This design can ensure that the adhesive is more evenly distributed during the assembly process, and the total occupied assembly area is small, but it has a larger coverage range. After filling the adhesive, the gap can be filled in a larger range to prevent the bearing 3 from micro-moving.

[0056] like Figure 7 As shown, in order to further improve the fluidity and uniform distribution of the glue, thereby better filling the gap, enhancing the bonding strength of the glue, and reducing the micro-motion of the bearing 3 during use, a number of axially arranged guide grooves 5 are processed on the circumference of the outer ring 32 of the bearing 3. After the bearing 3 is assembled, the guide grooves 5 are staggered with the grooves 4. Specifically, the width of the guide grooves 5 is not more than 0.1 mm, and the depth is not more than 0.05 mm. In addition, some small holes are designed at the end of the guide grooves 5. These small holes can further guide the flow of the adhesive and increase the filling density, thereby more effectively preventing the micro-motion of the bearing 3. During the installation process, the guide grooves 5 are also coated with adhesive.

[0057] like Figures 4-5As shown, the bearing assembly surface of the motor mover part 2 is processed according to the actual size D1 mm and the calibrated size D mm of the inner ring 31 of the bearing 3, so that the bearing assembly surface of the motor mover part 2 forms a transition fit with the inner ring 31 of the bearing 3, so that during the installation process of the bearing 3, the bearing assembly surface of the motor mover part 2 is extruded and deformed against the inner ring 31 of the bearing 3, ensuring that in the transition fit state, the clearance of the bearing 3 is reduced to close to the 0 line, thereby preventing the bearing 3 from moving slightly; specifically, the transition fit size should be proportional to the clearance size of the bearing 3, the reference size of the bearing assembly surface of the motor mover part 2 is D mm, the lower deviation is a mm, the upper deviation is b mm, a=D-D1+k, b=a+k / 2.

[0058] In this embodiment, the calibrated dimension D of the inner ring 31 of the bearing 3 is 38 mm, the actual measured dimension D1 is 37.994 mm, and the clearance of the bearing 3 is 0~+0.01 mm. Therefore, the upper deviation a of the transition fit dimension of the motor mover part 2 is 38-37.994+0.01 mm, i.e. a=0.016 mm, and the lower deviation b=0.016+0.005 mm, i.e. b=0.021 mm. That is, the machining dimension of the bearing assembly surface of the motor mover part 2 is

[0059] The operating principle of this embodiment is as follows: Through the above-mentioned design, the present invention can effectively prevent the bearing 3 from micro-moving during use. Specifically, the clearance fit between the bearing assembly surface of the motor stator component 1 and the outer ring 32 of the bearing 3, combined with the use of annular groove 4 and adhesive, can effectively fill the gap and prevent the bearing 3 from micro-moving. At the same time, the transition fit between the bearing assembly surface of the motor stator component 1 and the inner ring 31 of the bearing 3 ensures that the inner ring 31 of the bearing 3 is squeezed during assembly, reducing the clearance of the bearing 3 and further preventing the bearing 3 from micro-moving. This design not only improves the operating accuracy of the motor but also extends its service life, resolving the problems existing in the prior art.

[0060] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A method for preventing bearing micro-motion in a motor, characterized in that: The following steps are involved: Select bearings with positive clearance (3); According to the actual measured size of the inner ring (31) or outer ring (32) on the bearing (3) corresponding to the bearing assembly surface of the motor stator part (1), the bearing assembly surface of the motor stator part (1) is processed so that the bearing assembly surface of the motor stator part (1) and the inner ring (31) or outer ring (32) of the bearing (3) form a clearance fit, and a groove (4) is processed on the bearing assembly surface of the motor stator part (1), wherein the groove (4) is used to fill the adhesive to fill the gap between the bearing assembly surface of the motor stator part (1) and the inner ring (31) or outer ring (32) of the bearing (3); The bearing assembly surface of the motor mover part (2) is processed according to the actual measured size of the outer ring (32) or the inner ring (31) on the bearing (3) corresponding to the bearing assembly surface of the motor mover part (2), so that the bearing assembly surface of the motor mover part (2) forms a transition fit with the inner ring (31) or the outer ring (32) of the bearing (3), so that during the installation process of the bearing (3), the bearing assembly surface of the motor mover part (2) forms an extrusion deformation with respect to the inner ring (31) or the outer ring (32) of the bearing (3), thereby reducing the clearance of the bearing (3).

2. The method for preventing bearing micro-motion in a motor according to claim 1, characterized in that: The clearance value of the bearing (3) ranges from 0 to k mm. The component on the bearing (3) that matches the bearing assembly surface of the motor stator part (1) is the inner ring (31), and the component that matches the bearing assembly of the motor mover part (2) is the outer ring (32). The bearing assembly surface of the motor stator part (1) is processed according to the actual size of the inner ring (31) of the bearing (3), so that the assembly clearance between the bearing assembly surface of the motor stator part (1) and the inner ring (31) of the bearing (3) reaches a matching accuracy of h6-h7. The bearing assembly surface of the motor mover part (2) is processed according to the actual size D1 mm and the calibrated size D mm of the outer ring (32) of the bearing (3), wherein the reference size of the bearing assembly surface of the motor mover part (2) is D mm, the upper deviation is a mm, and the lower deviation is b mm, a=-(D-D1+k), b=-(a+k / 2).

3. The method for preventing bearing micro-motion in a motor according to claim 1, wherein: The clearance value range of the bearing (3) is 0~k mm, and the component on the bearing (3) that matches the bearing assembly surface of the motor stator part (1) is the outer ring (32), and the component that matches the bearing assembly surface of the motor mover part (2) is the inner ring (31); the bearing assembly surface of the motor stator part (1) is processed according to the actual size of the outer ring (32) of the bearing (3), so that the assembly clearance between the bearing assembly surface of the motor stator part (1) and the outer ring (32) of the bearing (3) reaches a matching accuracy of H6-H7; the bearing assembly surface of the motor mover part (2) is processed according to the actual size D1 mm and the calibrated size D mm of the inner ring (31) of the bearing (3), wherein the base size of the bearing assembly surface of the motor mover part (2) is D mm, the lower deviation is a mm, and the upper deviation is b mm; a=D-D1+k, b=a+k / 2.

4. The method for preventing bearing micro-motion in a motor according to claim 1, wherein: The groove (4) is a closed annular structure and is located in the middle of the bearing assembly surface of the motor stator component (1).

5. The method for preventing micro-movement of a bearing in a motor according to claim 4, wherein: The cross section of the groove (4) is a rectangular structure, the width of the groove (4) is no greater than one fifth of the depth of the bearing assembly surface of the motor stator part (1), and the depth of the groove (4) is set according to the use spacing of the adhesive.

6. The method for preventing bearing micro-motion in a motor according to claim 4, wherein: The groove (4) is arranged in a spiral structure on the bearing assembly surface of the motor stator part (1).

7. The method for preventing micro-movement of a bearing in a motor according to claim 1, wherein: The adhesive is high temperature resistant anaerobic adhesive.

8. The method for preventing micro-movement of a bearing in a motor according to claim 1, wherein: A plurality of guide grooves (5) are machined along the circumferential direction on the surface where the bearing (3) contacts the groove (4), and the guide grooves (5) and the groove (4) are arranged crosswise in the assembled state.

9. The method for preventing micro-movement of a bearing in a motor according to claim 8, wherein: The guide groove (5) is arranged along the axial direction of the bearing.

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