A full-automatic bearing coaxiality detection device and method

Abstract

The application relates to the technical field of laser measuring devices, and discloses a full-automatic bearing coaxiality detection device and method, which comprises a rack, a parallel belt assembly, a clamping and jacking mechanism, a convex laser measuring mechanism and an observation plate. The parallel belt assembly is fixed on the rack and comprises two parallel conveying belts. The clamping and jacking mechanism is arranged between the two conveying belts and comprises a jacking assembly and an expanding assembly. The coaxiality of the bearing is detected through the parallel belt assembly, the clamping and jacking mechanism, the convex laser measuring mechanism and the observation plate, full-automatic detection of the bearing can be realized, the coaxiality change of the bearing can be clearly observed through laser projection on the observation plate, the detection precision of the coaxiality is greatly improved, and the light spot on the observation plate can clearly reflect the offset and inclination between the inner and outer ring axes of the bearing.

Description

Technical Field

[0001] This invention relates to the technical field of laser measuring devices, and more particularly to a fully automatic bearing coaxiality detection device and method. Background Technology

[0002] For bearings, coaxiality error refers to the offset or tilt between the axes of the inner and outer rings. Unlike clearance, it is not specified in the datasheet, but it is one of the most critical geometric errors after installation, affecting lifespan, noise, friction, temperature rise, and reliability. The coaxiality of a bearing determines its operational stability. With industrial development, the requirements for bearing coaxiality are becoming increasingly stringent, while existing bearing coaxiality testing equipment has relatively low accuracy.

[0003] Furthermore, the current bearing coaxiality testing is usually done manually using testing instruments, which requires manual operation, resulting in low testing efficiency and the test results being greatly affected by human factors, easily leading to unstable test quality. Moreover, most current coaxiality testing equipment is used to detect the eccentricity of the inner and outer rings of the bearing, and there are very few testing devices that can detect the tilt of the inner and outer ring axes. Summary of the Invention

[0004] The purpose of this invention is to provide a fully automatic bearing coaxiality detection device and method to solve the problems of low accuracy and efficiency in existing bearing coaxiality detection.

[0005] This invention is achieved through the following technical solution: On the one hand, a fully automatic bearing coaxiality testing device is provided, including a frame; A parallel belt assembly, which is fixedly mounted on the frame, includes two parallel conveyor belts. A clamping and lifting mechanism, comprising a lifting component and an expansion component, is disposed between the two conveyor belts; A convex laser measurement mechanism and an observation plate are provided. The convex laser measurement mechanism includes a laser emitter, a detection wheel, a ball joint shaft, and a ring reflector. The detection wheel and the ring reflector are coaxially arranged and fixedly connected. The detection wheel is ball-jointed on the ball joint shaft. The light emitted by the laser emitter is reflected by the ring reflector and projected onto the observation plate to form a light spot.

[0006] In one possible design, two sliders are fixed at both ends of the ball joint shaft, each slider is slidably mounted on a trapezoidal slide, a trapezoidal guide rail is fixed on the frame, the trapezoidal slide is slidably mounted on the trapezoidal guide rail, the trapezoidal slide is fixed to the U-shaped slide, a guide optical shaft is provided between the slider and the U-shaped slide, the guide optical shaft is slidably engaged with the U-shaped slide, a spring is provided between the end of the guide optical shaft away from the slider and the U-shaped slide, and a limit block is fixed at the end of the trapezoidal slide away from the guide optical shaft.

[0007] In one possible design, a third electric telescopic rod is also fixed on the U-shaped slide block. The third electric telescopic rod is perpendicular to the guide optical axis. A locking block is fixed on the telescopic rod of the third electric telescopic rod. The locking block slides in a through hole opened on the U-shaped slide block. A locking notch is opened on the side of the guide optical axis facing the locking block.

[0008] In one possible design, a first electric telescopic rod is also fixed on the frame, and the telescopic rod of the first electric telescopic rod is fixed to the U-shaped slide.

[0009] In one possible design, the lifting assembly includes a base and a lifting cylinder, with a chamber between the base and the lifting cylinder, the chamber communicating with a connecting hole, the bottom of the base being fixed to the bottom of the frame, a first sealing ring being fixed to the top of the base, and a second sealing ring being fixed to the bottom of the lifting cylinder.

[0010] In one possible design, the expansion assembly includes a chuck body, a threaded disc, an opening / closing block, and a jaw shaft. The chuck body is fixed to the top of the frame, and a chuck opening / closing motor is fixed above the chuck body. The motor shaft of the chuck opening / closing motor is coaxial with the threaded disc. The threaded disc is rotatably disposed inside the chuck body and is fixed to the motor shaft of the chuck opening / closing motor. At least three guide slots are provided below the chuck body, and an opening / closing block slides in each guide slot. A jaw shaft is fixed on the opening / closing block.

[0011] In one possible design, a drive mechanism is also included, which includes a drive motor, a drive wheel, and a motor base. The body of the motor base is fixed on the motor base, the drive wheel is fixed on the motor shaft of the drive motor, and the motor base is slidably connected to the frame via a trapezoidal guide rail. A second electric telescopic rod is also fixed on the frame, and the telescopic rod of the second electric telescopic rod is fixedly connected to the motor base.

[0012] In one possible design, the parallel belt assembly further includes a square frame and a conveyor belt drive motor. The two conveyor belts are kept relatively fixed by the square frame, and the two conveyor belts are synchronously driven by a drive shaft. One pulley of one of the conveyor belts is fixedly connected to the motor shaft of the conveyor belt drive motor, and the stator of the conveyor belt drive motor is fixedly connected to the square frame.

[0013] On the other hand, a fully automatic method for detecting bearing coaxiality is provided, including the following detection process: S1. Place the bearing to be tested at the feed end of the conveyor belt, and the conveyor belt will transport the bearing to the clamping and lifting mechanism. S2. The clamping and lifting mechanism fixes the inner ring of the bearing and keeps the axis of the inner ring vertical. S3. The convex laser measuring mechanism is close to the outer ring of the bearing. The detection wheel is in close contact with the outer ring of the bearing. The laser emitter is turned on to emit laser light and control the rotation of the outer ring of the bearing. The projection on the observation plate during the entire rotation process is observed to determine whether the coaxiality of the bearing is qualified. S4. After the inspection is completed, move the convex laser measuring mechanism away from the outer ring of the bearing, and the expansion component controls the retraction of multiple jaw shafts to place the bearing on the conveyor belt and output the inspected bearing.

[0014] Furthermore, step S3 also includes the following judgment process: S31. Set the offset distance range between the center position of the light spot and the center of the observation board according to the coaxiality requirements, and determine whether the offset distance is qualified. S32. Set the tilt angle range of the light spot according to the coaxiality requirements, and determine whether the tilt angle is qualified. S33. Determine whether the bearing is qualified based on the judgment results of S31 and S32. Only if both S31 and S32 are judged as qualified can it be determined as a qualified product.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention utilizes a parallel belt assembly, a clamping and lifting mechanism, a convex laser measuring mechanism, and an observation plate to perform coaxiality detection of bearings. It enables fully automated bearing detection. Furthermore, by projecting a laser onto the observation plate, the coaxiality changes of the bearing can be clearly observed. The mechanism uses refraction to amplify slight fluctuations caused by coaxiality defects, greatly improving the accuracy of coaxiality detection. At the same time, the light spot on the observation plate can clearly reflect the offset and tilt between the inner and outer ring axes of the bearing, resulting in more accurate detection results. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the present invention; Figure 3 For the present invention Figure 2 A sectional view at point A-A; Figure 4 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 5 This is a rear view of the present invention; Figure 6 For the present invention Figure 5 A sectional view at point C-C; Figure 7 For the present invention Figure 6 Enlarged view at point D; Figure 8 This is a schematic diagram of the lifting assembly in this invention; Figure 9 A simplified diagram of light reflection under the condition that the center of the circle is normal and without deviation; Figure 10 This is a schematic diagram of the pattern on the observation board when the center of the circle is normal and without deviation. Figure 11 This is a simplified diagram of light reflection relative to the normal state where the center of the circle is not shifted to the left. Figure 12 This is a schematic diagram of the pattern on the observation board when the center of the circle is not shifted to the left relative to the normal condition. Figure 13 This is a schematic diagram of the pattern on the observation plate when the axes of the inner and outer rings of the bearing are tilted relative to each other.

[0017] The reference numerals in the attached drawings represent: 1 - frame, 2 - conveyor belt, 3 - square frame, 4 - lifting assembly, 401 - base, 402 - lifting cylinder, 403 - chamber, 404 - connecting hole, 405 - first sealing ring, 406 - second sealing ring, 5 - conveyor belt drive motor, 6 - expansion assembly, 7 - detection wheel, 8 - annular reflector, 9 - trapezoidal slide, 10 - trapezoidal guide rail, 11 - first electric telescopic rod, 12 - second electric telescopic rod, 13 - drive wheel, 14 - motor base, 15 - drive motor, 16 - chuck body, 17 - U-shaped slide, 18 - laser emitter, 19 - chuck opening and closing motor, 20 - threaded disc, 21 - ball joint shaft, 22 - slider, 23 - guide optical axis, 2301 - locking notch. 24 - Opening / closing block; 25 - Claw shaft; 26 - Spring; 27 - Limiting block; 28 - Third electric telescopic rod; 29 - Locking block; 30 - Observation plate. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0019] Example 1, as Figures 1 to 10 As shown, a fully automatic bearing coaxiality testing device includes a frame 1 and a parallel belt assembly. The parallel belt assembly is fixedly mounted on the frame 1 and includes two parallel conveyor belts 2. It also includes a clamping and lifting mechanism, which includes a lifting component 4 and an expansion component 6, and is located between the two conveyor belts 2; It also includes a convex laser measurement mechanism and an observation plate 30. The convex laser measurement mechanism includes a laser emitter 18, a detection wheel 7, a ball joint shaft 21, and a ring reflector 8. The detection wheel 7 and the ring reflector 8 are coaxially arranged and fixedly connected. The detection wheel 7 is ball-jointed on the ball joint shaft 21. The light emitted by the laser emitter 18 is reflected by the ring reflector 19 and projected onto the observation plate 30 to form a light spot.

[0020] Furthermore, two sliders 22 are fixed at both ends of the ball joint shaft 21. Each slider 22 is slidably mounted on a trapezoidal slide 9. A trapezoidal guide rail 10 is fixed on the frame 1. The trapezoidal slide 9 is slidably mounted on the trapezoidal guide rail 10. The trapezoidal slide 9 is fixed to the U-shaped slide 17. A guide optical shaft 23 is provided between the slider 22 and the U-shaped slide 17. The guide optical shaft 23 is slidably engaged with the U-shaped slide 17. A spring 26 is provided between the end of the guide optical shaft 23 away from the slider 22 and the U-shaped slide 17. A limit block 27 is fixed on the end of the trapezoidal slide 9 away from the guide optical shaft 23.

[0021] refer to Figure 3 , Figure 4 , Figure 9 as well as Figure 10 Advantageously, a third electric telescopic rod 28 is also fixed on the U-shaped slide 17. The third electric telescopic rod 28 is perpendicular to the guide optical axis 23. A locking block 29 is fixed on the telescopic rod of the third electric telescopic rod 28. The locking block 29 slides within a through hole opened on the U-shaped slide 17. A locking notch 2301 is opened on the side of the guide optical axis 23 facing the locking block 29. When the locking notch 2301 is locked with the locking block 29, the laser emitted by the laser emitter 18 is reflected by the annular reflector 8 and projected onto the observation plate 30 as shown in the image. Figure 9 and Figure 10As shown.

[0022] In this embodiment, a first electric telescopic rod 11 is also fixed on the frame 1. The telescopic rod of the first electric telescopic rod 11 is fixed to the U-shaped slide 17, so that the sliding of the U-shaped slide 17 can be controlled by the first electric telescopic rod 11. The laser emitter 18 is fixed on the U-shaped slide 17, and the U-shaped slide 17 can drive the convex laser measuring mechanism to move away from the expansion component 6 when not measuring, so as to prevent the convex laser measuring mechanism from interfering with the loading and unloading process of the expansion component 6.

[0023] When testing the coaxiality of the bearing, the inner ring of the bearing is fixed on the expansion assembly 6, ensuring the inner ring axis is vertical. The U-shaped slide 17 moves the entire convex laser measuring mechanism closer to the bearing, bringing the testing wheel 7 into contact with the outer ring of the bearing. Figure 3 When the detection wheel 7 is unobstructed, the slider 22 is pressed tightly against the limiting block 27 under the elastic force of the spring 26. After the detection wheel 7 is pressed tightly against the outer ring of the bearing, it continues to move until the locking block 29 engages with the locking notch 2301. Then, the movement of the U-shaped slide 17 is stopped, keeping the U-shaped slide 17 stationary. At this time, the laser emitted by the laser emitter 18 is reflected by the ring reflector 8, and its projection on the observation plate 30 is as follows: Figure 10 As shown, the third electric telescopic rod 28 is then controlled to retract the locking block 29, allowing the guide shaft 23 to slide in both directions, thereby detecting the bearing's eccentricity. The ball joint between the detection wheel 7 and the ball joint shaft 21 can detect the inclination of the bearing's inner and outer ring axes.

[0024] It should be noted that the extension of the first electric telescopic rod 11 and the second electric telescopic rod 12 is controlled by a resistance sensor detecting the resistance they receive.

[0025] In this embodiment, the lifting assembly 4 includes a base 401 and a lifting cylinder 402. A chamber 403 is provided between the base 401 and the lifting cylinder 402. The chamber 403 communicates with a connecting hole 404. The bottom of the base 401 is fixed to the bottom of the frame 1. A first sealing ring 405 is fixed to the top of the base 401, and a second sealing ring 406 is fixed to the bottom of the lifting cylinder 402. The first sealing ring 405 and the second sealing ring 406 ensure that the chamber 403 maintains good sealing performance.

[0026] In this embodiment, the expansion assembly 6 includes a chuck body 16, a threaded disc 20, opening and closing blocks 24, and a jaw shaft 25. The chuck body 16 is fixed to the top of the frame 1. A chuck opening and closing motor 19 is fixed above the chuck body 16. The motor shaft of the chuck opening and closing motor 19 is coaxial with the threaded disc 20. The threaded disc 20 is rotatably disposed inside the chuck body 16 and is fixed to the motor shaft of the chuck opening and closing motor 19. At least three guide slots are provided below the chuck body 16. An opening and closing block 24 is slidably disposed in each guide slot. A jaw shaft 25 is fixed on the opening and closing block 24. The chuck opening and closing motor 19 controls the rotation of the threaded disc 20. When the threaded disc 20 rotates, it can drive multiple opening and closing blocks 24 to slide. When multiple opening and closing blocks 24 slide, they together drive the fixed jaw shaft 25 to move, thereby allowing multiple jaw shafts 25 to open or close, completing the fixing or loosening of the bearing to be tested.

[0027] Furthermore, it also includes a drive mechanism, which includes a drive motor 15, a drive wheel 13, and a motor base 14. The body of the motor base 14 is fixed on the motor base 14, and the drive wheel 13 is fixed on the motor shaft of the drive motor 15. The motor base 14 is slidably connected to the frame 1 through a trapezoidal guide rail 10. A second electric telescopic rod 12 is also fixed on the frame 1. The telescopic rod of the second electric telescopic rod 12 is fixedly connected to the motor base 14, thereby controlling the sliding of the motor base 14 through the second electric telescopic rod 12, so that the distance between the drive motor 15 and the expansion assembly 6 can be adjusted. During testing, the bearing to be tested is fixed on the expansion assembly 6, and the second electric telescopic rod 12 extends so that the drive wheel 13 approaches and contacts the bearing, so that the entire drive mechanism contacts the bearing to be tested during testing to drive the bearing to be tested to rotate. After testing, it moves away from the expansion assembly 6 to prevent interference with the loading and unloading process of the expansion assembly 6.

[0028] In this embodiment, the parallel belt assembly also includes a square frame 3 and a conveyor belt drive motor 5. The two conveyor belts 2 are kept relatively fixed by the square frame 3. The two conveyor belts 2 are synchronously driven by a transmission shaft. One pulley of one side of the conveyor belt 2 is fixedly connected to the motor shaft of the conveyor belt drive motor 5. The motor stator of the conveyor belt drive motor 5 is fixedly connected to the square frame 3.

[0029] The bearing to be tested is placed on one end of the conveyor belt 2 and transported to the area below the expansion assembly 6 and above the lifting assembly 4 via the conveyor belt 2. The lifting cylinder 402 in the lifting assembly 4 extends and lifts the bearing upward through the expansion assembly 6. The trapezoidal slide 9 on the expansion assembly 6 rotates, which drives the threaded disc 20 to rotate. The threaded disc 20 drives the chuck shaft 25 to expand and fix the inner ring of the bearing. The chuck shaft 25 is in a vertical position, so that the fixed inner ring of the bearing is also in a vertical position. Then, the second electric telescopic rod 12 extends to control the drive wheel 13 to approach the expansion assembly 6, so that the drive wheel 13 contacts the outer ring of the bearing to be tested. The first electric telescopic rod 12 extends to control the drive wheel 13 to approach the expansion assembly 6. 1. The elongation control convex laser measuring mechanism approaches the expansion component 6, so that the detection wheel 7 contacts the outer ring of the bearing to be tested. The drive wheel 13 rotates, causing the outer ring of the bearing to rotate. The outer ring of the bearing causes the detection wheel 7 to rotate. If there is a misalignment between the center of the outer ring of the bearing and the center of the inner ring of the bearing, the detection wheel 7 will move together, and the light spot projected on the observation plate 30 will also change position. If the inner ring and the outer ring of the bearing are relatively tilted, the ball joint of the detection wheel 7 is on the ball joint shaft 21, and the detection wheel 7 will also tilt, causing the annular reflector 8 to tilt, resulting in the light spot projected on the observation plate 30 also tilting. Thus, the coaxiality of the bearing can be judged by the obvious change in the light spot on the observation plate 30.

[0030] Example 2, based on Example 1, further provides a fully automatic bearing coaxiality detection method. This example utilizes the detection equipment from Example 1 to detect the coaxiality of the bearing. (Refer to...) Figures 8 to 13 The laser emitted by the laser emitter 18, after being reflected by the annular mirror of the annular reflector 8, forms an elongated elliptical spot on the observation plate 30. Under normal, unbiased conditions, the center of this elongated elliptical spot is located at the center of the observation plate 30. When detecting the coaxiality of the bearing, if the center of the outer ring of the bearing is shifted to the left relative to the inner ring, the annular reflector 8 will move to the left as well. The projected spot of the laser emitter 18 on the observation plate 30 after passing through the annular reflector 8 will also move as well. If the inner and outer rings are different, the specific detection process of this detection method is as follows. S1. Place the bearing to be tested at the feed end of the conveyor belt 2, and the conveyor belt 2 will transport the bearing to the clamping and lifting mechanism. S2. The clamping and lifting mechanism fixes the inner ring of the bearing and keeps the axis of the inner ring vertical. The inner ring of the bearing is between the two conveyor belts 2. The lifting cylinder 402 in the lifting assembly 4 extends and pushes the bearing toward the expansion assembly 6. The expansion assembly 6 controls multiple claw shafts 25 to open and fix the inner ring of the bearing. S3. The convex laser measuring mechanism is close to the outer ring of the bearing. The detection wheel 7 is in close contact with the outer ring of the bearing. The laser emitter 18 is turned on to emit a laser, which controls the rotation of the outer ring of the bearing. The projection on the observation plate 30 is observed during the entire rotation process to determine whether the coaxiality of the bearing is qualified. S4. After the test is completed, move the convex laser measuring mechanism away from the outer ring of the bearing, and the expansion component 6 controls the multiple jaw shafts 25 to retract, place the bearing on the conveyor belt 2, and output the tested bearing.

[0031] It should be noted that the image judgment on the observation board 30 can be automatically completed by a CCD camera, thereby achieving fully automated detection.

[0032] Step S3 further includes the following judgment process: S31. Set the offset distance range between the center position of the light spot and the center of the observation board 30 according to the coaxiality requirements, and determine whether the offset distance is qualified. S32. Set the tilt angle range of the light spot according to the coaxiality requirements, and determine whether the tilt angle is qualified. S33. Determine whether the bearing is qualified based on the judgment results of S31 and S32. Only if both S31 and S32 are judged as qualified can it be determined as a qualified product.

[0033] The coaxiality of a bearing is determined by changing the reflection angle of a laser line. Even slight changes in coaxiality can cause significant alterations in the projection of the laser spot, greatly improving the accuracy of coaxiality detection. Furthermore, based on changes in the laser spot, it is also possible to detect misalignment and tilt between the inner and outer ring axes of the bearing. This not only improves detection accuracy but also enables a more comprehensive coaxiality assessment.

[0034] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fully automatic bearing coaxiality detection device, characterized in that, include: frame; Parallel belt assembly, which is fixedly mounted on the frame (1), includes two parallel conveyor belts (2). A clamping and lifting mechanism, comprising a lifting component (4) and an expansion component (6), is disposed between the two conveyor belts (2); A convex laser measurement mechanism and an observation plate (30) are provided. The convex laser measurement mechanism includes a laser emitter (18), a detection wheel (7), a ball joint shaft (21), and a ring reflector (8). The detection wheel (7) and the ring reflector (8) are coaxially arranged and fixedly connected. The detection wheel (7) is ball-jointed on the ball joint shaft (21). The light emitted by the laser emitter (18) is reflected by the ring reflector (8) and projected onto the observation plate (30) to form an elliptical light spot. Two sliders (22) are fixed at both ends of the ball joint shaft (21). Each slider (22) is slidably mounted on a trapezoidal slide (9). A trapezoidal guide rail (10) is fixed on the frame (1). The trapezoidal slide (9) is slidably mounted on the trapezoidal guide rail (10). The trapezoidal slide (9) is fixed to a U-shaped slide (17). A guide optical shaft (23) is provided between the trapezoidal slide (9) and the U-shaped slide (17). The guide optical shaft (23) is slidably engaged with the U-shaped slide (17). A spring (26) is provided between the end of the guide optical shaft (23) away from the slider (22) and the U-shaped slide (17). A limit block (27) is fixed at the end of the trapezoidal slide (9) away from the guide optical shaft (23).

2. The full-automatic bearing coaxiality detection device according to claim 1, characterized in that, A third electric telescopic rod (28) is also fixed on the U-shaped slide (17). The third electric telescopic rod (28) is perpendicular to the guide optical axis (23). A locking block (29) is fixed on the telescopic rod of the third electric telescopic rod (28). The locking block (29) slides in the through hole opened on the U-shaped slide (17). A locking notch (2301) is opened on the side of the guide optical axis (23) facing the locking block (29).

3. The full-automatic bearing coaxiality detection device according to claim 1, characterized in that, The frame (1) is also fixed with a first electric telescopic rod (11), and the telescopic rod of the first electric telescopic rod (11) is fixed with the U-shaped slide (17).

4. The full-automatic bearing coaxiality detection device according to claim 1, characterized in that, The lifting assembly (4) includes a base (401) and a lifting cylinder (402). A chamber (403) is provided between the base (401) and the lifting cylinder (402). The chamber (403) is connected to a connecting hole (404). The bottom of the base (401) is fixed to the bottom of the frame (1). A first sealing ring (405) is fixed to the top of the base (401), and a second sealing ring (406) is fixed to the bottom of the lifting cylinder (402).

5. The full-automatic bearing concentricity detection device according to claim 1, characterized in that, The expansion assembly (6) includes a chuck body (16), a threaded disc (20), an opening and closing block (24), and a jaw shaft (25). The chuck body (16) is fixed to the top of the frame (1). A chuck opening and closing motor (19) is fixed above the chuck body (16). The motor shaft of the chuck opening and closing motor (19) is coaxial with the threaded disc (20). The threaded disc (20) is rotatably disposed inside the chuck body (16). The threaded disc (20) is fixed on the motor shaft of the chuck opening and closing motor (19). At least three guide slots are provided below the chuck body (16). An opening and closing block (24) is slidably disposed in each guide slot. A jaw shaft (25) is fixed on the opening and closing block (24).

6. The full-automatic bearing concentricity detection device according to claim 1, characterized in that, It also includes a drive mechanism, which includes a drive motor (15), a drive wheel (13) and a motor base (14). The body of the motor base (14) is fixed on the motor base (14), the drive wheel (13) is fixed on the motor shaft of the drive motor (15), the motor base (14) is slidably connected to the frame (1) through a trapezoidal guide rail (10), and a second electric telescopic rod (12) is also fixed on the frame (1). The telescopic rod of the second electric telescopic rod (12) is fixedly connected to the motor base (14).

7. The full-automatic bearing coaxiality detection device according to claim 1, characterized in that, The parallel belt assembly also includes a square frame (3) and a conveyor belt drive motor (5). The two conveyor belts (2) are kept relatively fixed by the square frame (3). The two conveyor belts (2) are synchronously driven by a drive shaft. One pulley of one of the conveyor belts (2) is fixedly connected to the motor shaft of the conveyor belt drive motor (5). The motor stator of the conveyor belt drive motor (5) is fixedly connected to the square frame (3).

8. The detection method of a full-automatic bearing coaxiality detection device according to any one of claims 1-7, characterized in that, The testing process includes the following: S1. Place the bearing to be tested at the feed end of the conveyor belt (2), and the conveyor belt (2) will transport the bearing to the clamping and lifting mechanism. S2. The clamping and lifting mechanism fixes the inner ring of the bearing and keeps the axis of the inner ring vertical. S3. The convex laser measuring mechanism is close to the outer ring of the bearing. The detection wheel (7) is in close contact with the outer ring of the bearing. The laser emitter (18) is turned on to emit laser light, and the outer ring of the bearing is controlled to rotate. The projection on the observation plate (30) is observed during the entire rotation process to determine whether the coaxiality of the bearing is qualified. S4. After the test is completed, move the convex laser measuring mechanism away from the outer ring of the bearing, and the expansion component (6) controls the multiple jaw shafts (25) to retract, place the bearing on the conveyor belt (2), and output the tested bearing.

9. The detection method of a full-automatic bearing coaxiality detection device according to claim 8, characterized in that, Step S3 further includes the following judgment process: S31. Set the offset distance range between the center position of the light spot and the center of the observation board (30) according to the coaxiality requirements, and judge whether the offset distance is qualified. S32. Set the tilt angle range of the light spot according to the coaxiality requirements, and determine whether the tilt angle is qualified. S33. Determine whether the bearing is qualified based on the judgment results of S31 and S32. It is only considered a qualified product if both S31 and S32 are judged to be qualified.

Images