A bearing inner and outer diameter detection device

Abstract

The present invention discloses a device for detecting inner and outer diameters of a bearing, and specifically relates to the technical field of bearing detection. The device comprises a device main body, a detection component and a positioning component. A power supply is arranged on the device main body. The positioning component comprises a first positioning member slidably connected to the device main body. The first positioning member can slide and contact the inner wall of the inner ring of the bearing. One end of the first positioning member is slidably connected to a first electromagnetic part. The first electromagnetic part can slide inside the first positioning member and be energized. The positioning component also comprises a second positioning member slidably connected to the device main body. A second electromagnetic part is arranged on the second positioning member. When the first electromagnetic part is energized, the second positioning member can slide toward the first positioning member. The present invention performs simultaneous positioning detection on the inner ring and outer ring of the bearing through the positioning component, thereby reducing the error caused by the installation clearance between the inner ring and outer ring of the bearing and the roller. At the same time, the inner and outer diameters of the bearing are detected simultaneously, thereby improving the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing detection, and more specifically, to a device for detecting inner and outer diameters of a bearing. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support mechanical rotating bodies, reduce the friction coefficient during their movement, and ensure their rotation accuracy. Before using bearings, their dimensions need to be inspected. Since bearings are often used in conjunction with shafts, the dimensions of the inner and outer diameters of bearings are particularly important.

[0003] A Chinese patent with application number 202210580597.6 discloses an inner and outer diameter detection device for bearings with adaptive clamping based on intelligent manufacturing. The invention places the bearing to be detected on the bottom plate, and the rotation of the bidirectional motor drives the rack to move, so that the push rod moves toward the inside of the push tube, and the gas inside the push tube enters the telescopic push rod, so that the scale block moves until the standard end touches the inner wall of the inner diameter of the bearing, and the inner diameter measurement is completed. Through the outer diameter measuring mechanism and the pushing mechanism, the auxiliary base cylinder is connected to the outer diameter measuring mechanism, and the main base cylinder is connected to the pushing mechanism; the four groups of stretching rod lengths are accumulated and the average value is taken through the cumulative averaging module, and then the two-line summary module is used to summarize the relative stretching rod lengths of each two groups together, and finally the data is transmitted to the display unit through the strip display module. By measuring the two outer diameters of the bearing and averaging them, the data error obtained is smaller and the accuracy is higher, so that the quality of the finished product is relatively good.

[0004] However, existing bearing inner and outer diameter detectors usually detect the inner diameter and outer diameter separately. The separate detection of the inner and outer diameters requires separate positioning detection. Since there is installation clearance between the inner ring and outer ring of the bearing and the roller, errors are easily caused, and the efficiency of separate positioning detection is low. Moreover, when measuring the workpiece, multiple measurements are required to reduce the error. When the workpiece is rotated to change the measuring point, if it is not placed in place, it is easy for the measured diameter of the bearing to be not in the same plane as the actual diameter of the bearing, which leads to a large measurement error. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a bearing inner and outer diameter detection device to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a bearing inner and outer diameter detection device, comprising: an equipment body, a detection component and a positioning component, the equipment body is provided with a power supply, the positioning component comprises a first positioning member slidably connected to the equipment body, the first positioning member can slide and contact the inner wall of the inner ring of the bearing, one end of the first positioning member is slidably connected to a first electromagnetic part, the first electromagnetic part can slide inside the first positioning member and be energized; the positioning component also comprises a second positioning member slidably connected to the equipment body, the second positioning member is provided with a second electromagnetic part, when the first electromagnetic part is energized, the second positioning member can slide toward the first positioning member; a first power connection post is provided in the first positioning member, one end of the first power connection post is movably connected to a second power connection post, a third power connection post is provided in the first positioning member, the third power connection post is movably connected to the side wall of the first power connection post, and the first power connection post is electrically connected to the power supply.

[0007] Preferably, a first ventilation cavity and a second ventilation cavity are provided in the first positioning member, a ventilation groove is provided in the first positioning member, the ventilation groove and the first ventilation cavity are communicated, a first piston plate is slidably connected in the ventilation groove, an end of the first piston plate away from the ventilation groove is fixedly connected to a first piston rod, and one end of the first piston rod is fixedly connected to the second power terminal.

[0008] Preferably, the first ventilation chamber is connected with the second ventilation chamber via a through hole, the second ventilation chamber is provided with a through hole connected to the outside at one end away from the first ventilation chamber, the outer wall of the first piston rod is sleeved with a spring, one end of the spring is fixedly connected to the inner wall of the ventilation groove, and the other end of the spring is fixedly connected to one end of the first piston plate close to the first piston rod.

[0009] Preferably, the end of the first positioning member close to the first electromagnetic part is rotatably connected to the first positioning column, the second ventilation cavity is provided with an impeller, the impeller is fixedly connected to the first positioning column through a connecting shaft, the first positioning member has a slide groove at one end close to the first positioning column, one end of the first electromagnetic part is slidably connected to the slide groove, a first elastic member is provided inside the slide groove, one end of the first elastic member is fixedly connected to the bottom surface of the slide groove, the other end of the first elastic member is fixedly connected to an end of the first electromagnetic part close to the slide groove, the end of the second electromagnetic part away from the first electromagnetic part is fixedly connected to the second positioning column, the second electromagnetic part is electrically connected to the first electromagnetic part, and the first electromagnetic part is provided with a power board, which can contact the third power board.

[0010] Preferably, the bottom end of the first positioning member is fixedly connected to a first connecting member, the end of the first connecting member away from the first positioning member is fixedly connected to a second piston rod, the end of the second piston rod away from the first connecting member is fixedly connected to a second piston plate, an air storage tank is provided on the device body, the second piston plate is slidably connected to the inner wall of the air storage tank, and an avoidance groove corresponding to the first connecting member is provided on the device body.

[0011] Preferably, it also includes a detection platform, in which a limiting groove is provided, the second electromagnetic part is slidably connected to the limiting groove, the first positioning member is slidably connected to the limiting groove, a second elastic member is arranged in the limiting groove, one end of the second elastic member is fixedly connected to the first positioning member, the other end of the second elastic member is fixedly connected to an end of the second electromagnetic part close to the first electromagnetic part, and there are at least three first positioning members distributed in a circumferential array along the central axis of the detection platform.

[0012] Preferably, the detection assembly includes a detection member slidably connected to the device body, one end of the detection member is fixedly connected to a second connection member, and one end of the second connection member away from the detection member is threadedly connected to an adjustment rod.

[0013] Preferably, an adjustment slot is provided in the device body, the adjustment rod is arranged inside the adjustment slot and is movably connected to the adjustment slot, an adjustment ring is fixedly connected to the side wall of the adjustment rod, the adjustment ring is fixedly connected to the detection plate through a connecting rod, a mounting hole is provided in the device body, the detection plate is arranged inside the mounting hole and is slidably connected to the mounting hole, and an avoidance slot corresponding to the connecting rod is provided in the device body.

[0014] Preferably, a first measuring gauge is arranged inside the mounting hole, a probe of the first measuring gauge is in close contact with the detection plate, a third elastic member is arranged in the adjusting groove, one end of the third elastic member is fixedly connected to the inner wall of the adjusting groove, the other end of the third elastic member is fixedly connected to the adjusting rod, one end of the adjusting rod extending out of the adjusting groove is fixedly connected with a knob, a supporting frame is arranged on the upper end of the device body, and a second measuring gauge is arranged in the supporting frame.

[0015] Preferably, an air cylinder is provided in the main body of the device, and a third piston plate is slidably connected in the air cylinder, one end of the third piston plate is fixedly connected to a third piston rod, the third piston rod extends out of the air cylinder away from the third piston plate, one end of the third piston rod away from the third piston plate is fixedly connected to a knob, the third piston rod is threadedly connected to the inner wall of the air cylinder, and the air cylinder is connected to the air storage tank through a pipeline.

[0016] Technical effects and advantages of the present invention:

[0017] 1. The present invention uses a positioning component to simultaneously position and detect the inner ring and outer ring of the bearing, thereby reducing the error caused by the installation clearance between the inner ring and outer ring of the bearing and the roller, and simultaneously detecting the inner and outer diameters of the bearing, thereby improving the detection efficiency.

[0018] 2. The present invention adsorbs the inner ring and outer ring of the bearing by the first electromagnetic part and the second electromagnetic part during measurement, so that during detection, the inner ring and outer ring of the bearing are always in contact with the detection table, thereby preventing errors caused by improper placement when the bearing is rotated and placed again.

[0019] 3. The present invention cuts off the power to the first electromagnetic part and the second electromagnetic part when the bearing is rotated, thereby preventing the bearing from being always in an adsorbed state and the second positioning column from being always in a close contact state, which causes inconvenient rotation. At the same time, the bearing is repositioned during measurement to reduce measurement errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention when the bearing is installed.

[0021] Figure 2 It is a schematic diagram of the overall structure of the present invention when no bearing is installed.

[0022] Figure 3 It is a top view of the overall structure of the present invention.

[0023] Figure 4 It is a cross-sectional view of the overall structure of the present invention.

[0024] Figure 5 For the present invention Figure 4 A-section structure enlarged view.

[0025] Figure 6 It is a cross-sectional view of the air storage cylinder and the mounting hole structure of the present invention.

[0026] Figure 7 This is a cross-sectional view of the first positioning member structure of the present invention.

[0027] Figure 8 This is an exploded view of the first positioning member structure of the present invention.

[0028] Fig. 9 For the present invention Figure 7 Enlarged view of the structure of part B.

[0029] The accompanying drawings are marked as follows: 1. Equipment body; 11. Power supply; 12. Testing platform; 121. Limiting groove; 122. Second elastic member; 13. Adjusting groove; 131. Third elastic member; 14. Mounting hole; 15. Air storage tank; 16. Support frame; 17. Air storage cylinder; 171. Third piston plate; 172. Third piston rod; 2. Testing component; 21. Testing member; 22. Second connecting member; 23. Adjusting rod; 231. Adjusting ring; 24. Testing plate; 25. First measuring table; 26. Second measuring table; 3. Positioning component ; 31. First positioning member; 311. First power connection post; 312. Second power connection post; 313. Third power connection post; 314. First ventilation cavity; 315. Second ventilation cavity; 316. Ventilation groove; 317. First piston plate; 318. First piston rod; 32. First electromagnetic part; 321. First elastic member; 33. Second positioning member; 34. Second electromagnetic part; 35. First positioning column; 351. Impeller; 36. Second positioning column; 37. First connecting member; 371. Second piston rod; 372. Second piston plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] In the actual production process, the inner and outer diameter detectors of the bearings usually detect the inner diameter and the outer diameter separately. The inner and outer diameters need to be detected separately. Since there is installation clearance between the inner ring and the outer ring of the bearing and the roller, errors are easily caused, and the efficiency of separate positioning detection is low. This embodiment is specially invented to solve the above problem.

[0033] See also Figure 1 and Figure 2 As shown, a bearing inner and outer diameter detection device according to an embodiment of the present invention comprises a device body 1, a detection component 2 and a positioning component 3, and a power supply 11 is provided on the device body 1.

[0034] See also Figure 2 and Figure 3As shown, the positioning component 3 includes a first positioning member 31 slidably connected to the device body 1, the first positioning member 31 can slide and contact the inner wall of the inner ring of the bearing, one end of the first positioning member 31 is slidably connected to the first electromagnetic part 32, the first electromagnetic part 32 can slide inside the first positioning member 31 and be energized; the positioning component 3 also includes a second positioning member 33 slidably connected to the device body 1, the second positioning member 33 is provided with a second electromagnetic part 34, when the first electromagnetic part 32 is energized, the second positioning member 33 can slide toward the first positioning member 31.

[0035] See also Figure 7 and 9 As shown, a first power connection post 311 is provided in the first positioning member 31, one end of the first power connection post 311 is movably connected to a second power connection post 312, a third power connection post 313 is provided in the first positioning member 31, the third power connection post 313 is movably connected to the side wall of the first power connection post 311, and the first power connection post 311 is electrically connected to the power source 11.

[0036] See also Fig. 9 As shown, a first ventilation chamber 314 and a second ventilation chamber 315 are provided in the first positioning member 31, a ventilation groove 316 is provided in the first positioning member 31, the ventilation groove 316 and the first ventilation chamber 314 are connected, a first piston plate 317 is slidably connected in the ventilation groove 316, an end of the first piston plate 317 away from the ventilation groove 316 is fixedly connected to a first piston rod 318, one end of the first piston rod 318 is fixedly connected to the second power terminal 312, the first ventilation chamber 314 and the second ventilation chamber 315 are connected through a through hole, an end of the second ventilation chamber 315 away from the first ventilation chamber 314 is provided with a through hole connected to the outside, an outer wall of the first piston rod 318 is sleeved with a spring, one end of the spring is fixedly connected to the inner wall of the ventilation groove 316, and the other end of the spring is fixedly connected to an end of the first piston plate 317 close to the first piston rod 318.

[0037] See also Figure 8 and Fig. 9 As shown, one end of the first positioning member 31 close to the first electromagnetic part 32 is rotatably connected to the first positioning column 35, and an impeller 351 is arranged inside the second ventilation cavity 315. The impeller 351 is fixedly connected to the first positioning column 35 through a connecting shaft. A sliding groove is provided at one end of the first positioning member 31 close to the first positioning column 35, and one end of the first electromagnetic part 32 is slidably connected to the sliding groove. A first elastic member 321 is arranged inside the sliding groove, and one end of the first elastic member 321 is fixedly connected to the bottom surface of the sliding groove, and the other end of the first elastic member 321 is fixedly connected to one end of the first electromagnetic part 32 close to the sliding groove. The end of the second electromagnetic part 34 away from the first electromagnetic part 32 is fixedly connected to the second positioning column 36, and the second electromagnetic part 34 is electrically connected to the first electromagnetic part 32. A power board is arranged on the first electromagnetic part 32, and the power board can contact the third power board 313.

[0038] See also Figure 7 and Figure 8 As shown, the bottom end of the first positioning member 31 is fixedly connected to the first connecting member 37, the end of the first connecting member 37 away from the first positioning member 31 is fixedly connected to the second piston rod 371, the end of the second piston rod 371 away from the first connecting member 37 is fixedly connected to the second piston plate 372, an air storage tank 15 is provided on the equipment body 1, the second piston plate 372 is slidably connected to the inner wall of the air storage tank 15, and an avoidance groove corresponding to the first connecting member 37 is provided on the equipment body 1.

[0039] See also Figure 4 and Figure 5 As shown, the detection platform 12 is also included. A limiting groove 121 is provided in the detection platform 12. The second electromagnetic part 34 is slidably connected to the limiting groove 121. The first positioning member 31 is slidably connected to the limiting groove 121. A second elastic member 122 is provided in the limiting groove 121. One end of the second elastic member 122 is fixedly connected to the first positioning member 31, and the other end of the second elastic member 122 is fixedly connected to one end of the second electromagnetic part 34 close to the first electromagnetic part 32. Figure 3 As shown, there are at least three first positioning members 31 and they are distributed in a circumferential array along the central axis of the detection platform 12 .

[0040] See also Figure 3 and Figure 4 As shown, the detection assembly 2 includes a detection member 21 slidably connected to the device body 1, one end of the detection member 21 is fixedly connected to a second connection member 22, and the end of the second connection member 22 away from the detection member 21 is threadedly connected to an adjustment rod 23; Figure 6 As shown, an adjustment slot 13 is provided in the device body 1, an adjustment rod 23 is arranged inside the adjustment slot 13 and is movably connected to the adjustment slot 13, an adjustment ring 231 is fixedly connected to the side wall of the adjustment rod 23, and the adjustment ring 231 is fixedly connected to the detection plate 24 through a connecting rod, a mounting hole 14 is provided inside the device body 1, the detection plate 24 is arranged inside the mounting hole 14 and is slidably connected to the mounting hole 14, and an avoidance slot corresponding to the connecting rod is provided inside the device body 1.

[0041] See also Figure 6 As shown, a first measuring gauge 25 is arranged inside the mounting hole 14, and the probe of the first measuring gauge 25 is in close contact with the detection plate 24, a third elastic member 131 is arranged in the adjustment slot 13, one end of the third elastic member 131 is fixedly connected to the inner wall of the adjustment slot 13, and the other end of the third elastic member 131 is fixedly connected to the adjustment rod 23, and one end of the adjustment rod 23 extending out of the adjustment slot 13 is fixedly connected to a knob; Figure 1 and Figure 2 As shown, a support frame 16 is provided at the upper end of the equipment body 1 , and a second measuring meter 26 is provided inside the support frame 16 .

[0042] See also Figure 6 As shown, an air cylinder 17 is provided in the device body 1, and a third piston plate 171 is slidably connected in the air cylinder 17, one end of the third piston plate 171 is fixedly connected to a third piston rod 172, the third piston rod 172 extends out of the air cylinder 17 away from the third piston plate 171, one end of the third piston rod 172 away from the third piston plate 171 is fixedly connected to a knob, the third piston rod 172 is threadedly connected to the inner wall of the air cylinder 17, and the air cylinder 17 is connected to the air storage tank 15 through a pipeline.

[0043] When in use, firstly, the third piston rod 172 is rotated to make the third piston plate 171 slide inside the air storage cylinder 17, so that the second piston plate 372 slides inside the air storage tank 15, so that the second piston plate 372 drives the first connecting member 37 to slide through the second piston rod 371, so that the first connecting member 37 drives the first positioning member 31 to move, and the first positioning member 31 is moved to the inner diameter distance to be measured by using a standard gauge for calibration, and at the same time, the adjusting rod 23 is rotated to move the detection member 21 to calibrate the first measuring table 25. After the calibration is completed, the power supply 11 of the equipment body 1 is turned on. At this time, since the power board on the first electromagnetic part 32 is not in contact with the third power post 313, the first electromagnetic part 32 and the second electromagnetic part 34 are not energized. At this time, the bearing to be tested is placed on the equipment body 1. At this time, The first electromagnetic part 32 is pressed down on the bearing so that the first electromagnetic part 32 slides inside the slide groove, thereby compressing the first elastic member 321. When the bearing is placed, the first positioning column 35 is in close contact with the inner wall of the bearing. At the same time, the power board on the first electromagnetic part 32 slides to contact the third power column 313 and is energized. Since the second electromagnetic part 34 is electrically connected to the first electromagnetic part 32, the second electromagnetic part 34 is energized at this time, and the first electromagnetic part 32 and the second electromagnetic part 34 are attracted to each other so that the second positioning column 36 clamps the outer ring of the bearing. At this time, the second measuring table 26 is calibrated to complete the simultaneous detection of the inner diameter and outer diameter of the bearing. The inner ring and outer ring of the bearing are simultaneously positioned and detected through the positioning component 3, thereby reducing the error caused by the installation clearance between the inner ring and outer ring of the bearing and the roller. At the same time, the inner and outer diameters of the bearing are detected at the same time, thereby improving the detection efficiency.

[0044] Embodiment 2

[0045] In actual use, it was found that when measuring a workpiece, multiple measurements are required to reduce errors. When the workpiece is rotated to change the measuring point, if it is not placed in place, it is easy to cause the measured diameter of the bearing and the actual diameter of the bearing to be not in the same plane, resulting in a large measurement error. Further improvements are made on the basis of the above embodiments.

[0046] On the basis of the above embodiment, during use, when the bearing is placed, the first electromagnetic part 32 is energized to adsorb the inner ring of the bearing, so that the inner ring of the bearing is tightly fitted on the detection platform 12. At the same time, when the second electromagnetic part 34 moves so that the second positioning column 36 clamps the outer ring of the bearing, the second electromagnetic part 34 adsorbs the outer ring of the bearing, so that the outer ring of the bearing is tightly fitted to the detection platform 12, thereby ensuring that the bearing is always in a state of tight fit with the detection platform 12 during measurement, thereby preventing errors caused by improper placement when the bearing is rotated and placed again.

[0047] Embodiment 3

[0048] It was found in actual use that when measuring the rotating bearing multiple times, the workpiece was inconvenient to rotate because the bearing was always in an adsorbed state and the second positioning column 36 was always in a close contact state. Further improvements were made on the basis of the above embodiments.

[0049] On the basis of the above embodiment, during use, when the inspector rotates the bearing, since the inner ring of the bearing is in close contact with the first positioning column 35, the rotation of the bearing drives the first positioning column 35 to rotate, so that the first positioning column 35 drives the impeller 351 to rotate, so that the internal gas of the ventilation groove 316 enters the second ventilation cavity 315 through the first ventilation cavity 314 and is discharged. Since the internal gas of the ventilation groove 316 is reduced, the first piston plate 317 drives the second power connection column 312 to move through the first piston rod 318, and the spring inside the ventilation groove 316 is stretched, so that the second power connection column 312 is separated from the first power connection column 311, so that the first electromagnetic part 32 and the second electromagnetic part 34 are powered off. At this time, the first electromagnetic part 32 and the second electromagnetic part 34 are no longer attracted to each other, and the second elastic member 122 relaxes and causes the second electromagnetic part 34 to slide toward the outside of the test bench 12, so that the second positioning column 36 is no longer in close contact with the outer ring of the bearing and can rotate easily. When the rotation is completed, the impeller 351 stops rotating, and the first piston plate 317 slides in the opposite direction inside the ventilation groove 316 under the action of the spring, so that the second power connection column 312 contacts the first power connection column 311, so that the first electromagnetic part 32 and the second electromagnetic part 34 adsorb the bearing and the second positioning column 36 repositions the outer ring of the bearing. When the bearing is rotated, the first electromagnetic part 32 and the second electromagnetic part 34 are powered off to prevent the bearing from being always in an adsorbed state and the second positioning column 36 from being always in close contact. At the same time, the bearing is repositioned during measurement to reduce measurement errors.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bearing inner and outer diameter detection device, comprising a device body (1) and a detection component (2), wherein the device body (1) is provided with a power supply (11), characterized in that: Also includes: A positioning component (3), the positioning component (3) comprising a first positioning member (31) slidably connected to the device body (1), the first positioning member (31) being able to slide and contact the inner wall of the inner ring of the bearing, one end of the first positioning member (31) being slidably connected to a first electromagnetic part (32), the first electromagnetic part (32) being able to slide inside the first positioning member (31) and be energized; The positioning assembly (3) further comprises a second positioning member (33) slidably connected to the device body (1); a second electromagnetic part (34) is provided on the second positioning member (33); when the first electromagnetic part (32) is energized, the second positioning member (33) can slide towards the first positioning member (31); A first power connection post (311) is arranged in the first positioning member (31), one end of the first power connection post (311) is movably connected to a second power connection post (312), a third power connection post (313) is arranged in the first positioning member (31), the third power connection post (313) is movably connected to a side wall of the first power connection post (311), and the first power connection post (311) is electrically connected to a power source (11); A first ventilation cavity (314) and a second ventilation cavity (315) are provided in the first positioning member (31), a ventilation groove (316) is provided in the first positioning member (31), the ventilation groove (316) and the first ventilation cavity (314) are in communication, the first ventilation cavity (314) and the second ventilation cavity (315) are in communication via a through hole, a first piston plate (317) is slidably connected in the ventilation groove (316), an end of the first piston plate (317) away from the ventilation groove (316) is fixedly connected to a first piston rod (318), and one end of the first piston rod (318) is fixedly connected to the second power terminal (312); A through hole communicating with the outside is formed at one end of the second ventilation cavity (315) away from the first ventilation cavity (314); a spring is sleeved on the outer wall of the first piston rod (318); one end of the spring is fixedly connected to the inner wall of the ventilation groove (316); and the other end of the spring is fixedly connected to an end of the first piston plate (317) close to the first piston rod (318); One end of the first positioning member (31) close to the first electromagnetic part (32) is rotatably connected to the first positioning column (35); an impeller (351) is arranged inside the second ventilation cavity (315); the impeller (351) is fixedly connected to the first positioning column (35) via a connecting shaft; one end of the first positioning member (31) close to the first positioning column (35) is provided with a slide groove; one end of the first electromagnetic part (32) is slidably connected to the slide groove; a first elastic member (321) is arranged inside the slide groove; one end of the first elastic member (321) is fixedly connected to the bottom surface of the slide groove; the other end of the first elastic member (321) is fixedly connected to one end of the first electromagnetic part (32) close to the slide groove; one end of the second electromagnetic part (34) away from the first electromagnetic part (32) is fixedly connected to the second positioning column (36); the second electromagnetic part (34) is electrically connected to the first electromagnetic part (32); and an electric connection board is arranged on the first electromagnetic part (32); the electric connection board can contact the third electric connection column (313).

2. The bearing inner and outer diameter detection device according to claim 1, characterized in that: The bottom end of the first positioning member (31) is fixedly connected to a first connecting member (37); an end of the first connecting member (37) away from the first positioning member (31) is fixedly connected to a second piston rod (371); an end of the second piston rod (371) away from the first connecting member (37) is fixedly connected to a second piston plate (372); an air storage tank (15) is provided on the device body (1); the second piston plate (372) is slidably connected to the inner wall of the air storage tank (15); and an avoidance groove corresponding to the first connecting member (37) is provided on the device body (1).

3. The bearing inner and outer diameter detection device according to claim 2, characterized in that: The detection platform (12) further comprises a detection platform (12), wherein a limiting groove (121) is provided in the detection platform (12), the second electromagnetic part (34) is slidably connected to the limiting groove (121), the first positioning member (31) is slidably connected to the limiting groove (121), a second elastic member (122) is provided in the limiting groove (121), one end of the second elastic member (122) is fixedly connected to the first positioning member (31), the other end of the second elastic member (122) is fixedly connected to one end of the second electromagnetic part (34) close to the first electromagnetic part (32), and the number of the first positioning members (31) is at least three and they are distributed in an array circumferentially along the central axis of the detection platform (12).

4. The bearing inner and outer diameter detection device according to claim 3 is characterized in that: The detection assembly (2) comprises a detection member (21) slidably connected to the device body (1); one end of the detection member (21) is fixedly connected to a second connection member (22); and one end of the second connection member (22) away from the detection member (21) is threadedly connected to an adjustment rod (23).

5. The bearing inner and outer diameter detection device according to claim 4, characterized in that: An adjustment groove (13) is provided in the device body (1); the adjustment rod (23) is arranged inside the adjustment groove (13) and is movably connected to the adjustment groove (13); an adjustment ring (231) is fixedly connected to the side wall of the adjustment rod (23); the adjustment ring (231) is fixedly connected to a detection plate (24) via a connecting rod; a mounting hole (14) is provided inside the device body (1); the detection plate (24) is arranged inside the mounting hole (14) and is slidably connected to the mounting hole (14); and an avoidance groove corresponding to the connecting rod is provided inside the device body (1).

6. The bearing inner and outer diameter detection device according to claim 5, characterized in that: A first measuring gauge (25) is arranged inside the mounting hole (14), a probe of the first measuring gauge (25) is in close contact with the detection plate (24), a third elastic member (131) is arranged inside the adjustment groove (13), one end of the third elastic member (131) is fixedly connected to the inner wall of the adjustment groove (13), the other end of the third elastic member (131) is fixedly connected to the adjustment rod (23), one end of the adjustment rod (23) extending out of the adjustment groove (13) is fixedly connected to a knob, and a support frame (16) is arranged at the upper end of the device body (1), and a second measuring gauge (26) is arranged inside the support frame (16).

7. The bearing inner and outer diameter detection device according to claim 6, characterized in that: An air storage cylinder (17) is provided in the device body (1), a third piston plate (171) is slidably connected in the air storage cylinder (17), one end of the third piston plate (171) is fixedly connected to a third piston rod (172), the third piston rod (172) extends out of the air storage cylinder (17) away from the third piston plate (171), one end of the third piston rod (172) away from the third piston plate (171) is fixedly connected to a knob, the third piston rod (172) is threadedly connected to the inner wall of the air storage cylinder (17), and the air storage cylinder (17) is connected to the air storage tank (15) through a pipeline.

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