Bearing inner and outer ring groove side runout adjuster

Abstract

The application discloses a bearing inner and outer ring groove side runout difference adjusting device, which comprises a fixed block, a crank cam and a driving structure for driving the crank cam to rotate are arranged on the fixed block, adjusting plates are arranged on both sides of the fixed block and the two adjusting plates are oppositely arranged, linkage structures for driving the adjusting plates to move synchronously to realize the relative motion of the two adjusting plates when the crank cam rotates are connected between the two adjusting plates and the crank cam, detection structures for contacting the inner wall of the channel of the outer ring main body to be detected and used for force feedback and positioning structures for adapting to the channel of the outer ring main body to be detected so that the detection structures can accurately contact the inner wall of the channel are arranged at the tail ends of the adjusting plates. The application solves the problems that the contact between the detection components and the inner wall of the channel is not accurate, the force feedback of the side runout parameters is not timely, and the side runout difference adjusting precision is low and the efficiency is poor in the traditional bearing inner and outer ring groove side runout difference adjusting process.

Description

Technical Field

[0001] This invention relates to the field of bearing adjustment equipment technology, specifically a bearing inner and outer ring groove side runout differential adjuster. Background Technology

[0002] As a core component of mechanical transmission systems, the lateral runout difference between the inner and outer raceways of bearings is a key indicator affecting the bearing's operational accuracy, stability, and service life. Therefore, during the production, testing, and precision assembly of bearings, it is necessary to use specialized adjustment equipment to precisely control this lateral runout difference. Such adjustment equipment is widely used in bearing manufacturing, precision machining, and other technical fields.

[0003] Currently, most equipment for adjusting the lateral runout difference between the inner and outer ring grooves of bearings adopts a split structure of "independent positioning fixture and contact detection sensor". The positioning fixture is responsible for initially fixing the inner and outer rings of the bearing, and the contact detection sensor is brought close to the inner wall of the groove with manual assistance or simple bracket to collect the lateral runout parameters. Then, the relative position of the inner and outer rings of the bearing is adjusted by manual or semi-automatic drive mechanism to correct the lateral runout difference.

[0004] However, these existing devices have obvious technical defects: on the one hand, the detection sensors lack a dedicated positioning structure adapted to the inner wall of the channel, relying only on the rough positioning of the fixture, which easily leads to problems such as contact misalignment and loose fit between the detection sensors and the inner wall of the channel, resulting in a significant reduction in the accuracy of side swing parameter acquisition; on the other hand, the force feedback module of the detection sensor lacks a linkage design with the positioning and drive structure, resulting in a delay in force signal transmission, which cannot guide the adjustment action of the drive mechanism in real time, requiring repeated calibration. Not only is it difficult to achieve the micron-level requirements of precision bearings (usually needing to be controlled within 5μm), but it also significantly reduces the adjustment efficiency, making it difficult to adapt to large-scale bearing production processes. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a bearing inner and outer ring groove side runout difference adjuster, which solves the problems of inaccurate contact between the detection component and the inner wall of the groove and untimely force feedback of the side runout parameters in the traditional bearing inner and outer ring groove side runout difference adjustment process, resulting in low side runout difference adjustment accuracy and poor efficiency.

[0006] To achieve the above objectives, the present invention provides a bearing inner and outer ring groove side runout differential adjuster, comprising a fixed block for mounting at the center of the inner and outer ring bodies of the bearing to be tested in the external environment. The fixed block is provided with a crank cam and a drive structure for driving the crank cam to rotate. Adjustment plates are provided on both sides of the fixed block and are arranged opposite to each other. Each of the two adjustment plates is connected to the crank cam by a linkage structure for driving the adjustment plates to move synchronously when the crank cam rotates, so as to realize the relative movement of the two adjustment plates. The end of the adjustment plate is provided with a detection structure for contacting the inner wall of the groove of the inner and outer ring bodies to be tested in the external environment and for force feedback, and a positioning structure for adapting to the groove of the inner and outer ring bodies to be tested in the external environment so that the detection structure makes precise contact with the inner wall of the groove.

[0007] The advantages of adopting the above technical solution are as follows: The fixed block ensures the centering of the inner and outer rings of the bearing under test, guaranteeing the consistency of bearing positioning references. The crank cam, in conjunction with the drive structure, provides a stable power source for the device, ensuring controllable power output. Furthermore, the linkage structure synchronously drives two opposing adjustment plates to move relative to each other when the crank cam rotates, ensuring the coordination and consistency of movement. The detection structure achieves contact and force feedback with the inner wall of the raceway, providing core data support for detecting lateral slip differences. The positioning structure is adapted to the raceway, ensuring precise contact between the detection structure and the inner wall of the raceway, preventing contact deviation or separation. Through the above technical design, the device integrates positioning, detection, and linkage adjustment functions, simplifying the split structure of the equipment, improving the coordination of various functional modules, enhancing the device's adaptability to bearings of different specifications, and optimizing the reliability of the lateral slip adjustment process, thus solving the adjustment defects caused by the dispersed functions of traditional equipment.

[0008] The invention further comprises: slots on both sides of the outer arc surface of the crank cam; the linkage structure includes two connecting rods, which are respectively disposed in the two slots; the starting ends of the connecting rods are bent toward the corresponding slots to form connecting ends, which are engaged with the slots; the ends of the connecting rods extend outward from the slots and are bent toward the adjacent adjusting plates to form mating ends; the starting ends of the adjusting plates have a first through hole for the mating ends to pass through, the diameter of the first through hole being larger than the diameter of the mating ends; the fixing block has a second through hole for the mating ends to pass through, the diameter of the second through hole being larger than the diameter of the first through hole; one of the two adjusting plates has its starting end positioned above the fixing block, and the other adjusting plate has its starting end positioned below the fixing block; when the crank cam rotates, the two connecting rods drive their respective corresponding adjusting plates to move synchronously, causing the two adjusting plates to move toward each other or toward separation, thereby achieving contact and detection between the detection structure and the inner wall of the groove of the inner and outer rings of the bearing to be tested.

[0009] The advantages of adopting the above technical solution are as follows: In the above technology, the groove on the outer arc surface of the crank cam provides a stable locking foundation for the connecting rod, ensuring the reliability of the connection between the connecting rod and the crank cam. The connecting end of the connecting rod engages with the groove, and the engaging end is further provided with a first through hole of the adjusting plate and a second through hole of the fixing block. The diameter of the through holes is set in a gradient manner, which not only realizes the movable connection between the connecting rod and the adjusting plate, but also reserves reasonable space for the relative movement of the adjusting plate. The two adjusting plates are respectively set above and below the fixing block. With the movement of the connecting rod driven by the rotation of the crank cam, precise relative convergence or separation can be achieved, ensuring that the contact process between the detection structure and the inner wall of the channel is smooth and controllable, avoiding contact impact to improve the service life of the detection structure. At the same time, it optimizes the accuracy of the linkage transmission, reduces the loss in the power transmission process, and enhances the synchronization and stability of the device movement.

[0010] The invention further comprises: the two slots are staggered in their opening directions and the slot openings are connected to the outer peripheral wall of the crank cam; the inner wall of the slot opening is bent toward the slot direction with a limiting edge; a limiting gap is formed between the inner wall of the limiting edge and the inner wall of the slot opening opposite it to limit the connecting end of the connecting rod from disengaging from the slot along the slot opening direction; the width of the limiting gap is smaller than the diameter of the connecting end of the connecting rod.

[0011] The advantages of adopting the above technical solution are as follows: the misalignment of the two slots in the above technology allows the movement direction of the connecting rod to match the relative distribution of the adjusting plate, improving the synchronization and adaptability of the linkage transmission; the limiting edge at the slot opening forms a limiting gap, which can restrict the connecting rod connection end from coming off along the slot direction, ensuring the connection stability between the connecting rod and the crank cam, and preventing the connecting rod from falling off during the movement, thus preventing device failure; the size design of the above limiting gap not only achieves the anti-disengagement function, but also does not interfere with the normal movement of the connecting rod in the slot, ensuring the smoothness of power transmission, enhancing the stability of device operation, improving the durability of the structure, reducing the maintenance frequency caused by component loosening, and optimizing the reliability of the device.

[0012] The present invention further comprises: a linkage plate disposed below the adjustment plate; an extension portion extending outward from the starting end of the adjustment plate toward the crank cam; a bayonet and a connecting port being provided on the extension portion; a snap-fit ​​portion for engaging with the bayonet at the starting end of the linkage plate; a mating portion at the end of the linkage plate; a loading spring connected between the mating portion and the extension portion; connecting wires integrally formed at both ends of the loading spring; one connecting wire engaging with the connecting port; and the other connecting wire connected to the mating portion; and both the positioning structure and the detection structure being disposed at the end of the linkage plate.

[0013] The advantages of adopting the above technical solution are as follows: In the above technology, the linkage plate realizes the connection between the adjustment plate and the positioning and detection structure, expands the functional extension path of the adjustment plate, and the snap-fit ​​of the extension part of the adjustment plate and the snap-fit ​​part of the linkage plate make the two detachable, which facilitates the maintenance and replacement of components; while the connecting wire of the loading spring in conjunction with the connection port realizes the stable connection between the loading spring and the extension and the mating part. The loading spring can buffer the force fluctuation during the linkage process and reduce the rigid impact between components; the positioning structure and the detection structure are located at the end of the linkage plate, shortening the force transmission path, improving the response speed of detection and adjustment, optimizing the rationality of the structural layout, enhancing the space utilization of the device, and improving the integration of functional modules.

[0014] The present invention further comprises: an adjustment plate bent at the end of the linkage plate; the detection structure includes a probe disposed on the adjustment plate; the end of the probe is a contact end for contacting the inner wall of the groove of the inner and outer ring bodies of the bearing to be tested; the probe and the adjustment plate are coaxially aligned; and the adjustment plate and the adjustment plate are perpendicular to each other.

[0015] The advantages of adopting the above technical solution are as follows: the adjustment plate with the bent end of the linkage plate adapts to the spatial layout of the bearing groove, ensuring the rationality of the installation position of the positioning and detection structure, while the contact end of the probe achieves direct contact with the inner wall of the groove, providing a core contact carrier for side swing detection; the probe and the adjustment plate are coaxially aligned to ensure that the force direction of the contact end is consistent with the side swing direction of the groove, improving the accuracy of force feedback, making the contact angle of the probe adapt to the contour of the inner wall of the groove, avoiding detection blind spots, improving the comprehensiveness of side swing detection, and enhancing the effectiveness and reliability of the detection data.

[0016] The present invention further comprises: a pre-tightening spring connected between the end of the probe and the adjustment plate; the beginning of the pre-tightening spring being coaxially sleeved with the probe; and the end of the pre-tightening spring being coaxially connected with the adjustment plate.

[0017] The advantages of adopting the above technical solution are as follows: In the above technology, the pre-tensioning spring is coaxially sleeved with the probe and connected to the adjustment plate, providing a stable pre-tensioning force for the probe, ensuring the tight fit between the probe and the inner wall of the channel, preventing the probe from separating from the inner wall during bearing rotation, and the pre-tensioning spring can buffer the impact force of the channel side swing on the probe, reduce probe wear, and improve the service life of the detection structure; the coaxial setting of the pre-tensioning spring makes the force feedback direction consistent with the probe displacement direction, improving the accuracy of force signal transmission, optimizing the detection accuracy of side swing parameters, and enhancing the working stability and continuity of the detection structure.

[0018] The present invention further comprises: the positioning structure including two protrusions on the outer peripheral wall of the adjustment plate, which are used to contact and adapt with the top and bottom of the inner wall of the groove of the outer bearing inner and outer ring bodies to achieve stable positioning of the adjustment plate in the groove. The two protrusions are symmetrically arranged, and the outer peripheral wall of the protrusions is connected to the outer peripheral wall of the adjustment plate by a smooth arc surface.

[0019] The advantages of adopting the above technical solution are as follows: the protrusions are symmetrically arranged on the outer peripheral wall of the adjusting plate, and are adapted to contact the top and bottom of the inner wall of the groove, realizing the stable positioning of the adjusting plate in the groove and providing a reliable support benchmark for the detection structure; the smooth arc connection between the protrusions and the adjusting plate reduces contact friction with the inner wall of the groove, avoids scratching the groove surface, and ensures the processing quality of the bearing; the stable positioning effect of the protrusions ensures the accurate contact position between the detection structure and the inner wall of the groove, improves the consistency of side swing detection, enhances the adjustment reliability of the device, and optimizes the compatibility of the structure with bearing grooves of different specifications, thus expanding the applicability of the device.

[0020] The present invention further comprises: the driving structure including a fine-tuning stage linear motor, the fine-tuning stage linear motor being disposed below the fixed block and detachably connected to the fixed block, and the output end of the fine-tuning stage linear motor passing through the fixed block and coaxially connected to the crank cam.

[0021] The advantages of adopting the above technical solution are as follows: The fine-tuning stage linear motor, as the drive structure, provides precise power output, ensuring the controllability of the crank cam rotation angle. Its detachable connection to the fixed block facilitates motor maintenance and replacement, improving the device's maintenance convenience. The output end is coaxially connected to the crank cam, ensuring coaxiality of power transmission, reducing rotational deviation, and improving the crank cam's rotational accuracy. Simultaneously, the use of a fine-tuning stage linear motor makes the driving process smoother, improving the motion accuracy of the linkage structure and enhancing the device's precise control over lateral sway adjustment. When the lateral sway of the bearing groove exceeds the allowable range, the fine-tuning stage linear motor can push the adjustment tool with micron-level precision based on data feedback from the measurement system, accurately correcting the groove's position. This high-precision adjustment effectively reduces groove lateral sway differences, improves bearing rotational accuracy, optimizes the compatibility of the drive system and the device, and simultaneously enhances the stability and continuity of power output. Attached Figure Description

[0022] Figure 1 This is a simplified view of the fit between the present invention and the outer body of the bearing to be tested.

[0023] Figure 2 This is a three-dimensional view of the present invention;

[0024] Figure 3 This is a three-dimensional view of the adjusting plate, the linkage plate, and their linkage components in this invention;

[0025] Figure 4 This is a three-dimensional view of the disengagement plate and the linkage plate in the separated state in this invention;

[0026] Figure 5 This is a three-dimensional view of the separation state of the adjustment plate, the probe, and their linkage components in this invention. Detailed Implementation

[0027] This invention provides a bearing inner and outer ring groove side runout difference adjuster, including a fixed block 1 for installation at the center of the inner and outer ring bodies of the bearing to be tested externally. The fixed block 1 is provided with a crank cam 11 and a drive structure for driving the crank cam 11 to rotate. Adjusting plates 2 are provided on both sides of the fixed block 1, and the two adjusting plates 2 are arranged opposite to each other. Each adjusting plate 2 is connected to the crank cam 11 by a linkage structure that drives the adjusting plates 2 to move synchronously when the crank cam 11 rotates, thereby achieving relative movement between the two adjusting plates 2. The end of each adjusting plate 2 is provided with a detection structure for contacting the inner wall of the groove of the inner and outer ring bodies to be tested externally for force feedback, and a detection structure for adapting to the groove of the inner and outer ring bodies to be tested externally so that the detection structure aligns with the inner wall of the groove. The positioning structure ensures precise wall contact. The crank cam 11 has slots 111 on both sides of its outer arc surface. The linkage structure includes two connecting rods 12, each positioned in one of the slots 111. The starting end of each connecting rod 12 is bent towards the corresponding slot 111 to form a connecting end 121, which engages with the slot 111. The ending end of each connecting rod 12 extends outward from the slot 111 and is bent towards the adjacent adjusting plate 2 to form a mating end 122. The adjusting plate 2 has a first through hole 21 at its starting end for the mating end 122 to pass through. The diameter of the first through hole 21 is larger than the diameter of the mating end 122. The fixing block 1 has a second through hole 13 on its fixing block 1 for the mating end 122 to pass through. The diameter of the second through hole 13 is larger than the diameter of the mating end 122. The first through hole 21 is provided. One of the two adjusting plates 2 is positioned above the fixed block 1, and the other adjusting plate 2 is positioned below the fixed block 1. When the crank cam 11 rotates, the two connecting rods 12 drive their respective adjusting plates 2 to move synchronously, causing the two adjusting plates 2 to move relative to each other to achieve contact and detection between the detection structure and the inner wall of the groove of the inner and outer rings of the bearing to be tested. The two slots 111 are staggered in opening direction, and the opening of the slots 111 is connected to the outer peripheral wall of the crank cam 11. The inner wall of the opening of the slot 111 is bent towards the slot 111 direction with a limiting edge 14. The inner wall of the limiting edge 14 and the inner wall of the opening of the slot 111 opposite to it form a useful space. A limiting gap 141 is formed at the connecting end 121 of the limiting link 12, which disengages from the slot 111 along the opening direction of the slot 111. The width diameter of the limiting gap 141 is smaller than the diameter of the connecting end 121 of the link 12. A linkage plate 3 is provided below the adjusting plate 2. The starting end of the adjusting plate 2 extends outward toward the crank cam 11 with an extension portion 22. The extension portion 22 has a bayonet 221 and a connecting port 222. The starting end of the linkage plate 3 has a locking part 31 for engaging with the bayonet 221. The end of the linkage plate 3 has a mating part 32. A loading spring 33 is connected between the mating part 32 and the extension portion 22. Both ends of the loading spring 33 are integrally formed with connecting wires 331, one of which engages with the connecting port 222.Another connecting wire 331 is connected to the mating part 32. The positioning structure and the detection structure are both located at the end of the linkage plate 3. The end of the linkage plate 3 is bent to form an adjusting plate 34. The detection structure includes a probe 4 mounted on the adjusting plate 34. The end of the probe 4 is a contact end 41 for contacting the inner wall of the groove of the inner and outer ring bodies of the bearing to be tested. The probe 4 is coaxially aligned with the adjusting plate 34. The adjusting plate 34 is perpendicular to the adjusting plate 2. A preload spring 42 is connected between the end of the probe 4 and the adjusting plate 34. The beginning of the preload spring 42 is coaxially sleeved with the probe 4. The end of the spring 42 is coaxially connected to the adjusting plate 34. The positioning structure includes two protrusions 35 on the outer peripheral wall of the adjusting plate 34, which are adapted to contact the top and bottom of the inner wall of the groove of the outer bearing inner and outer ring bodies to achieve stable positioning of the adjusting plate 34 in the groove. The two protrusions 35 are symmetrically arranged, and the outer peripheral wall of the protrusions 35 is connected to the outer peripheral wall of the adjusting plate 34 with a smooth arc surface. The driving structure includes a fine-tuning stage linear motor 5, which is located below the fixed block 1 and detachably connected to the fixed block 1. The output end of the fine-tuning stage linear motor 5 passes through the fixed block 1 and is coaxially connected to the crank cam 11.

[0028] Overall operating procedure of the bearing inner and outer ring groove side runout differential adjuster:

[0029] 1. Preliminary preparation: Check the integrity of each component of the device, ensuring that the fixed block, crank cam, connecting rod, adjusting plate, linkage plate, adjusting plate, probe, loading spring, preload spring, and fine-tuning stage linear motor are reliably connected and free from looseness or damage; install the inner and outer ring bodies of the bearing to be tested at the center position of the fixed block, so that the groove faces the positioning and testing structure; start the equipment to initialize, so that all moving parts return to their initial positions, ensuring that the probe does not contact the inner wall of the groove, and that the preload spring and loading spring are in a natural extension and contraction state.

[0030] 2. Drive Start: Start the linear motor of the fine-tuning stage under the fixed block. Its output end drives the coaxially connected crank cam to rotate stably on the fixed block, providing precise and controllable power output for the device.

[0031] 3. Linkage transmission: When the crank cam rotates, the connecting rod end in the outer arc groove moves synchronously with the groove. The connecting rod mating end drives the upper and lower opposing adjustment plates to move relative to each other through the second through hole of the fixing block and the first through hole of the adjustment plate. The adjustment plate is linked with the linkage plate through the bayonet of the extension, driving the linkage plate to move synchronously. The loading spring buffers the force fluctuation during the movement through the connecting wire to avoid rigid impact between components.

[0032] 4. Positioning and placement: The linkage plate drives the end adjustment plate to approach the bearing groove. The symmetrical protrusions on the outer peripheral wall of the adjustment plate make contact with the top and bottom of the inner wall of the groove. The smooth arc surface fits together to achieve stable positioning of the adjustment plate in the groove, providing a reliable reference for the test structure.

[0033] 5. Detection feedback: The probe contact end, which is coaxially set on the adjustment plate, fits tightly against the inner wall of the channel. The preload spring provides continuous preload force to ensure stable contact. When the bearing rotates, the channel side swing pushes the probe to produce a small displacement. The preload spring feeds back the force signal through deformation and collects the side swing parameters in real time.

[0034] 6. Precise Adjustment: Based on the force feedback signal from the probe, the linear motor of the fine-tuning stage adjusts the rotation angle of the crank cam in real time. Through the linkage of the connecting rod, the adjusting plate, and the linkage plate, the position of the adjusting plate and the probe is finely adjusted until the difference in lateral runout between the inner and outer ring grooves of the bearing meets the accuracy requirements.

[0035] The aforementioned technology, through integrated design, breaks through the limitations of traditional equipment's dispersed positioning, detection, and adjustment functions, achieving efficient collaboration among various functional modules. This fundamentally solves the core problems of inaccurate detection contact, delayed force feedback, insufficient adjustment precision, and low efficiency in traditional adjustment processes. Furthermore, the device relies on an automated linkage mechanism to reduce errors caused by manual intervention. Through precise power transmission and feedback closed-loop, it ensures the consistency and reliability of lateral runout adjustment, significantly improving bearing operating accuracy and service life. The overall structure is compact and rationally laid out, with high space utilization, adaptable to the detection and adjustment needs of bearings of different specifications, enhancing the equipment's versatility and applicability. Simultaneously, the device operates smoothly and controllably, effectively avoiding rigid impacts and wear between components, reducing maintenance frequency and operating costs. It achieves efficient adjustment without complex operations, adapting to large-scale bearing production processes, providing a stable, efficient, and precise lateral runout adjustment solution for bearing manufacturing, and improving the overall practicality and economy of the production process.

[0036] In the above-described technology, the inner and outer ring bodies of the bearing are designated as 6 in the accompanying drawings, and the groove is designated as 61.

[0037] In the aforementioned technology, the probe can be flexibly connected to a force contact sensor, a digital sensor, or a torsion spring meter to achieve data feedback, depending on the actual testing scenario and accuracy requirements. Each connection component has its own advantages: the force contact sensor can capture the dynamic changes in the contact force between the probe and the inner wall of the groove in real time, accurately feeding back force signal fluctuations during the lateral swing process; the digital sensor can convert contact displacement and force signals into digital data, providing rapid transmission response and easy integration with automated adjustment systems, supporting real-time closed-loop control; while the torsion spring meter, through the synergy of mechanical and electrical signals, combines intuitive readings with stable feedback characteristics, adapting to high-precision micro-adjustment scenarios, and facilitating easy assembly and disassembly. These multiple connection methods can cover the testing needs of bearings of different specifications, ensuring the comprehensiveness, accuracy, and adaptability of lateral swing data feedback, thereby constructing a complete data feedback and adjustment closed loop, guaranteeing the integrity and reliability of the lateral swing difference adjustment between the inner and outer ring grooves of the bearing.

[0038] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A bearing inner and outer ring groove side runout differential adjuster, characterized in that: The device includes a fixed block for mounting at the center of the inner and outer rings of the bearing to be tested. The fixed block is equipped with a crank cam and a drive structure for driving the crank cam to rotate. Adjusting plates are provided on both sides of the fixed block and are arranged opposite to each other. Each of the two adjusting plates is connected to the crank cam by a linkage structure that drives the adjusting plates to move synchronously when the crank cam rotates, so as to realize the relative movement of the two adjusting plates. The end of the adjusting plate is provided with a detection structure for contacting the inner wall of the groove of the inner and outer rings to be tested and for force feedback, and a positioning structure for adapting to the groove of the inner and outer rings to be tested so that the detection structure makes precise contact with the inner wall of the groove.

2. The bearing inner and outer ring groove side runout differential adjuster according to claim 1, characterized in that: The crank cam has slots on both sides of its outer arc surface. The linkage structure includes two connecting rods, which are respectively located in the two slots. The starting ends of the connecting rods are bent toward the corresponding slots to form connecting ends, which are engaged with the slots. The ends of the connecting rods extend outward from the slots and are bent toward the adjacent adjustment plates to form mating ends. The starting ends of the adjustment plates have a first through hole for the mating ends to pass through, and the diameter of the first through hole is larger than the diameter of the mating ends. The fixing block has a second through hole for the mating ends to pass through, and the diameter of the second through hole is larger than the diameter of the first through hole. One of the two adjustment plates is positioned above the fixing block, and the other adjustment plate is positioned below the fixing block. When the crank cam rotates, the two connecting rods drive their respective corresponding adjustment plates to move synchronously, causing the two adjustment plates to move toward each other or apart to achieve contact and detection between the detection structure and the inner wall of the groove of the inner and outer rings of the bearing to be tested.

3. The bearing inner and outer ring groove side runout differential adjuster according to claim 2, characterized in that: The two slots are offset in their opening directions and their openings are connected to the outer peripheral wall of the crank cam. The inner wall of the slot opening is bent toward the slot direction with a limiting edge. A limiting gap is formed between the inner wall of the limiting edge and the inner wall of the slot opening opposite it to limit the connecting end of the connecting rod from dislodging from the slot along the slot opening direction. The width of the limiting gap is smaller than the diameter of the connecting end of the connecting rod.

4. The bearing inner and outer ring groove side runout differential adjuster according to claim 1, characterized in that: A linkage plate is provided below the adjustment plate. The starting end of the adjustment plate extends outward toward the crank cam. The extension has a bayonet and a connecting port. The starting end of the linkage plate has a snap-fit ​​part for engaging with the bayonet. The end of the linkage plate has a mating part. A loading spring is connected between the mating part and the extension. Both ends of the loading spring are integrally formed with connecting wires. One of the connecting wires engages with the connecting port, and the other connecting wire is connected to the mating part. The positioning structure and the detection structure are both located at the end of the linkage plate.

5. The bearing inner and outer ring groove side runout differential adjuster according to claim 4, characterized in that: The linkage plate has an adjustment plate bent at its end. The detection structure includes a probe on the adjustment plate. The end of the probe is a contact end for contacting the inner wall of the groove of the inner and outer ring bodies of the bearing to be tested. The probe is coaxially aligned with the adjustment plate, and the adjustment plate is perpendicular to the adjustment plate.

6. The bearing inner and outer ring groove side runout differential adjuster according to claim 5, characterized in that: A pre-tightening spring is connected between the end of the probe and the adjustment plate. The beginning of the pre-tightening spring is coaxially sleeved with the probe, and the end of the pre-tightening spring is coaxially connected with the adjustment plate.

7. A bearing inner and outer ring groove side runout adjuster according to claim 6, characterized in that: The positioning structure includes two protrusions on the outer peripheral wall of the adjustment plate, which are used to contact and adapt with the top and bottom of the inner wall of the groove of the outer bearing inner and outer ring bodies to achieve stable positioning of the adjustment plate in the groove. The two protrusions are symmetrically arranged, and the outer peripheral wall of the protrusions is connected to the outer peripheral wall of the adjustment plate with a smooth arc surface.

8. The bearing inner and outer ring groove side runout differential adjuster according to claim 1, characterized in that: The drive structure includes a fine-tuning stage linear motor, which is located below the fixed block and is detachably connected to the fixed block. The output end of the fine-tuning stage linear motor passes through the fixed block and is coaxially connected to the crank cam.

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