Universal motor shaft polishing device

Abstract

The application discloses a kind of universal motor shaft polishing device related to motor shaft polishing technical field.The supporting shell is provided with fixed platform on the supporting shell, the supporting shell is provided with support frame, the support frame is rotatably connected with rotating frame, the rotating frame is provided with two transmission parts of central symmetry distribution, the transmission part is provided with grinding wheel group, the support frame is fixedly connected with second driving part, and the output shaft of the second driving part is fixedly connected with the rotating frame.The application is provided with rotary double-grinding wheel group structure, when the grinding wheel group in working condition is damaged, the rotating frame drives two grinding wheel groups to rotate 180° to switch the position of two grinding wheel groups to continue motor shaft polishing work, ensure the continuity of motor shaft batch polishing, avoid production interruption caused by replacing grinding wheel, significantly improve equipment utilization and batch production efficiency, and damaged grinding wheel can be repaired offline to reduce downtime loss.

Description

Technical Field

[0001] This invention relates to the field of motor shaft grinding technology, and in particular to a general-purpose motor shaft grinding device. Background Technology

[0002] As the core transmission component of a motor, the motor shaft bears the important responsibility of transmitting torque, supporting rotor rotation, and accurately positioning bearings and loads. Its geometric accuracy and surface quality directly affect the smoothness of motor operation, noise level, assembly performance, and overall service life. Therefore, grinding, as a key process in the motor shaft manufacturing process, is crucial to ensuring the final quality of the motor shaft.

[0003] In existing grinding equipment, grinding wheels are susceptible to various adverse factors during long-term operation, such as heat accumulation in the grinding area, metal chips mixed into the grinding interface, and interference between the edge of the grinding wheel and the shoulder structure. These factors can lead to damage such as local chipping, abrasive burns, or microcracks in the grinding wheel. Once the grinding wheel is in abnormal condition, it will not only significantly reduce the processing quality but also bring operational safety hazards, requiring immediate shutdown and replacement. This will cause the grinding work of the motor shaft to be interrupted. In the scenario of mass and continuous production of motor shafts, such unplanned shutdowns seriously disrupt the production rhythm, resulting in capacity loss and increased maintenance costs, and restricting the improvement of overall manufacturing efficiency and equipment utilization. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides a universal motor shaft grinding device.

[0005] The technical solution of the present invention is as follows: a universal motor shaft grinding device, comprising a supporting shell, a fixed platform for fixing and rotating a motor shaft on the supporting shell, a supporting frame on the supporting shell, a rotating frame rotatably connected to the supporting frame, two centrally symmetrically distributed transmission components on the rotating frame, a grinding wheel set for grinding the motor shaft on the transmission components, a first driving component fixedly connected to the supporting frame, a first gear fixedly connected to the output shaft of the first driving component, two centrally symmetrically distributed second gears rotatably connected to the rotating frame, both of the two second gears meshing with the first gear, the two centrally symmetrically distributed second gears driving the corresponding transmission components to rotate, a second driving component fixedly connected to the supporting frame, and the output shaft of the second driving component fixedly connected to the rotating frame.

[0006] More preferably, both second gears are unidirectional gears, and the two second gears drive the corresponding transmission members to rotate in opposite directions.

[0007] More preferably, the grinding wheel assembly is composed of several grinding wheel discs spliced ​​together.

[0008] More preferably, the transmission component consists of two sleeves, two transmission rings, and two splined shafts. Both transmission rings are rotatably connected to the rotating frame, and the second gear is used to drive the adjacent transmission rings to rotate. The transmission rings are splinedly connected to the adjacent sleeves, and the sleeves are splinedly connected to the adjacent splined shafts. Both splined shafts are provided with notches, and the notches of the two splined shafts are used to mate with each other. Both splined shafts are detachably connected to the grinding wheel assembly.

[0009] More preferably, the sleeve is threaded with a locking bolt for locking the sleeve to the adjacent splined shaft.

[0010] More preferably, the rotating frame is rotatably connected to four rectangularly distributed threaded shafts, and two adjacent threaded shafts of the transmission component are threadedly connected to two symmetrically distributed push frames. The push frames are rotatably connected to the adjacent sleeves, and a transmission module is provided between two adjacent threaded shafts of the transmission component. The transmission module is used to make the two adjacent threaded shafts of the transmission component rotate synchronously.

[0011] More preferably, the support frame is fixedly connected to two symmetrically distributed third driving members, and the telescopic end of the third driving member is fixedly connected to a connecting frame, which is used to dock with the adjacent spline shaft.

[0012] More preferably, the spline shaft is slidably connected to two centrally symmetrically distributed locking blocks at the end away from the adjacent third driving member, the locking blocks are fixedly connected to push blocks, and an elastic element is provided between the two adjacent locking blocks.

[0013] More preferably, the spline shaft is slidably connected to a push shaft, the push shaft being used to compress two adjacent push blocks that are symmetrically distributed at their centers, and the connecting frame is fixedly connected to an electromagnet, the electromagnet being used to drive the adjacent push shafts to move.

[0014] More preferably, the push shaft has an annular inclined surface at one end near the two correspondingly symmetrically distributed card blocks, and the push block has an inclined surface that fits against the annular inclined surface of the push shaft.

[0015] The beneficial effects are as follows: 1. The present invention uses a rotary double grinding wheel set structure. When the grinding wheel set in the working state is damaged, the rotating frame drives the two grinding wheel sets to rotate 180° to switch the positions of the two grinding wheel sets to continue the grinding work of the motor shaft. This ensures the continuity of batch grinding of the motor shaft, avoids production interruption caused by changing grinding wheels, significantly improves equipment utilization and batch production efficiency, and the damaged grinding wheel can be repaired offline, reducing downtime losses.

[0016] 2. By modularizing the grinding wheel set, shaft sections with few diameter changes can be spliced ​​into a single integral grinding wheel, completing full contour grinding in one feed, thus improving grinding efficiency. For complex shafts with many diameter changes, the number of grinding wheels can be reduced to thin the thickness, improving grinding flexibility. This allows for comprehensive adaptation to the processing needs of various motor shaft specifications, while also improving convenience and shortening replacement time when changing grinding wheel sets.

[0017] 3. By changing the position of the locking blocks on the two splined shafts, the damaged grinding wheel in the grinding wheel set can be located, and the grinding wheel set can be divided into two groups according to the position of the damaged grinding wheel. This makes it easier for the staff to replace the damaged grinding wheel at the correct point without disassembling the whole set. Only the damaged grinding wheel needs to be replaced. The disassembly and assembly process is quick and efficient, shortening the replacement time of the grinding wheel set. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the supporting shell of the present invention; Figure 3 This is a three-dimensional structural diagram of the support frame and rotating frame of the present invention; Figure 4 This is a three-dimensional structural schematic diagram of the transmission component of the present invention; Figure 5 This is a three-dimensional structural diagram of the first gear and the second gear of the present invention; Figure 6 This is a three-dimensional structural diagram of the threaded shaft and pusher frame of the present invention; Figure 7 This is a three-dimensional structural diagram of the sleeve and splined shaft of the present invention; Figure 8 This is a three-dimensional structural diagram of the third driving component and the connecting frame of the present invention; Figure 9 This is a three-dimensional cross-sectional view of the spline shaft of the present invention; Figure 10 for Figure 9 A magnified schematic diagram of the three-dimensional structure at point A in the middle.

[0019] The components in the diagram are labeled as follows: 1-Supporting shell, 2-Fixed platform, 3-Support frame, 4-Rotating frame, 5-Transmission component, 6-Grinding wheel set, 7-First driving component, 8-First gear, 9-Second gear, 10-Second driving component, 201-Sleeve, 202-Transmission ring, 203-Splined shaft, 204-Locking bolt, 301-Threaded shaft, 302-Push frame, 303-Transmission module, 401-Third driving component, 402-Connecting frame, 501-Clamping block, 502-Push block, 503-Elastic component, 504-Push shaft, 505-Electromagnet. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] In existing grinding equipment, grinding wheels are prone to chipping, burning, or cracking due to heat buildup, chip contamination, or structural interference. Once damaged, the machine must be stopped immediately for replacement, interrupting the grinding work of the motor shaft. In the mass continuous production of motor shafts, such unplanned shutdowns seriously disrupt the cycle time, resulting in production capacity loss, increased maintenance costs, and hindering the improvement of manufacturing efficiency and equipment utilization.

[0022] Example 1 This embodiment provides a universal motor shaft grinding device to ensure continuous grinding of motor shafts.

[0023] like Figures 1-5As shown, the device includes a supporting housing 1, with a switch door on the rear side for changing the grinding wheel. A fixed platform 2 is mounted on the supporting housing 1 to fix and rotate the motor shaft. The fixed platform 2 is an existing intelligent control platform that can fix the motor shaft and drive it to move left and right and rotate. A support frame 3 is mounted on the supporting housing 1, and a displacement module (not shown in the figure) is installed inside the supporting housing 1. The displacement module drives the support frame 3 to move back and forth. A rotating frame 4 is rotatably connected to the support frame 3. The rotating frame 4 has two centrally symmetrically distributed transmission components 5. In this embodiment, the transmission component 5 is a single transmission key shaft, and the rotating frame 4 is rotatably connected to the two centrally symmetrically distributed transmission components 5, but this is limited to this embodiment. A grinding wheel set 6 for grinding the motor shaft is mounted on the transmission component 5. The grinding wheel set 6 is composed of several grinding wheel blades. The number of grinding wheel blades, the radius of each grinding wheel blade, and the distribution of each grinding wheel blade can be adjusted according to the specifications of the motor shaft. A first driving component 7 is fixedly connected to the left side of the support frame 3. The first driving component 7 is a servo motor. The output shaft of the first driving component 7 is fixedly connected to a first gear 8. Two centrally symmetrically distributed second gears 9 are rotatably connected to the left side of the rotating frame 4. The two second gears 9 are located on the front and rear sides of the first gear 8, respectively. Both second gears 9 mesh with the first gear 8. The two centrally symmetrically distributed second gears 9 are used to drive the corresponding transmission component 5 to rotate. Both second gears 9 are unidirectional gears, and the rotation directions of the corresponding transmission component 5 driven by the two second gears 9 are opposite. In the initial state, when the first gear 8 rotates clockwise, it can only drive the corresponding transmission component 5 to rotate through the front second gear 9. When the first gear 8 rotates counterclockwise, it can only drive the corresponding transmission component 5 to rotate through the rear second gear 9. This is used to reduce the operating load of the first driving component 7. The right side of the support frame 3 is fixedly connected to a second driving component 10. The second driving component 10 is a servo motor. The output shaft of the second driving component 10 is fixedly connected to the rotating frame 4. The output shaft of the second driving component 10 drives the two grinding wheel sets 6 to rotate through the rotating frame 4 and the transmission component 5.

[0024] Working principle: When the motor shaft needs to be polished, the operator installs the motor shaft on the fixed platform 2. The fixed platform 2 drives the motor shaft to rotate, and then the first drive component 7 is turned on. The output shaft of the first drive component 7 drives the first gear 8 to rotate clockwise. The first gear 8 drives the two second gears 9 to rotate in the same direction. At this time, the second gear 9 on the front side can drive the corresponding transmission component 5 to rotate synchronously. The transmission component 5 drives the grinding wheel set 6 on it to rotate synchronously. Then the displacement module pushes the support frame 3 to move forward. The support frame 3 drives the grinding wheel set 6 on its front side to contact the motor shaft for polishing through the rotating frame 4 and the transmission component 5. This continues until the motor shaft polishing is finished. At this time, the displacement module pushes the support frame 3 to move backward to reset. The support frame 3 drives the grinding wheel set 6 on its front side to contact and separate from the motor shaft through the rotating frame 4 and the transmission component 5. Then the fixed platform 2 stops driving the motor shaft to rotate. The operator replaces the motor shaft. This cycle is repeated until the polishing of the motor shaft stops. At this time, the first drive component 7 is turned off. When the motor shaft needs to be polished again, the above steps are repeated.

[0025] If the grinding wheel set 6 is damaged during the grinding process of the motor shaft and affects the grinding accuracy of the motor shaft, and needs to be replaced, during the downtime of replacing the motor shaft, turn off the first drive component 7 and turn on the second drive component 10. The output shaft of the second drive component 10 drives the rotating frame 4 to rotate 180°. The rotating frame 4 rotates the rear grinding wheel set 6 to the front side, and similarly rotates the front grinding wheel set 6 to the rear side, and then continues the above-mentioned motor shaft grinding work.

[0026] The grinding wheel set 6 consists of several grinding wheels. The operator can adjust the composition of the grinding wheel set 6 according to the actual grinding radius and contour of the motor shaft. When there are few diameter changes in the grinding area, the grinding wheel set 6 can be directly spliced ​​according to the radius change of the entire grinding area of ​​the motor shaft, so that the grinding wheel set 6 can directly grind the entire grinding area of ​​the motor shaft without changing its position, thus improving efficiency and ensuring coaxiality at each position. When there are many diameter changes in the grinding area, the number of grinding wheels in the grinding wheel set 6 can be reduced, and the thickness of the grinding wheel set 6 can be reduced, thus improving the grinding flexibility of the grinding wheel set 6. Therefore, it is suitable for grinding motor shafts of various specifications.

[0027] Example 2 This embodiment provides a general-purpose motor shaft grinding device, which is a further improvement on the basis of embodiment 1.

[0028] like Figures 6-9As shown, the transmission component 5 consists of two sleeves 201, two transmission rings 202, and two splined shafts 203. Both transmission rings 202 are rotatably connected to the rotating frame 4. The second gear 9 drives the adjacent transmission ring 202 to rotate. In this embodiment, initially, when the first gear 8 rotates clockwise, it can only drive the corresponding transmission ring 202 to rotate via the front second gear 9. When the first gear 8 rotates counterclockwise, it can only drive the corresponding transmission ring 202 to rotate via the rear second gear 9. The transmission ring 202 is splinedly connected to the adjacent sleeve 201, and the sleeve 201 is splinedly connected to the adjacent splined shaft 203. The sleeve 201 is located between the adjacent transmission ring 202 and the... Between adjacent splined shafts 203, sleeves 201 can slide left and right along adjacent sleeves 201, and splined shafts 203 can slide left and right along corresponding sleeves 201. Both splined shafts 203 are provided with notches, which are used to connect with each other to achieve coaxial rotation when the two splined shafts 203 are connected. Both splined shafts 203 are detachably connected to the grinding wheel set 6, which is located between two adjacent sleeves 201. Sleeves 201 are threadedly connected with locking bolts 204, which are used to lock sleeves 201 to adjacent splined shafts 203. In the initial state, locking bolts 204 are locked to adjacent sleeves 201.

[0029] like Figure 3 and Figure 6 As shown, the rotating frame 4 is rotatably connected to four rectangularly distributed threaded shafts 301. Each threaded shaft 301 has two symmetrically distributed threaded sections. Two adjacent threaded shafts 301 of the transmission component 5 are threadedly connected to two symmetrically distributed push frames 302. The two push frames 302 are located on different threaded sections of the threaded shafts 301. The push frames 302 are rotatably connected to adjacent sleeves 201. The threaded shafts 301 can drive the two sleeves 201 to move in opposite directions or in opposite directions through the two push frames 302. A transmission module 303 is provided between two adjacent threaded shafts 301 of the transmission component 5. The transmission module 303 is used to make the two adjacent threaded shafts 301 of the transmission component 5 rotate synchronously. The transmission module 303 consists of two sprockets and a chain. The two sprockets are fixedly connected to the two adjacent threaded shafts 301 of the transmission component 5, and the chain is wound around the two sprockets. A rotating handle can be fixedly connected to the right end of each threaded shaft 301 for easy operation by the operator.

[0030] like Figure 2 , Figure 3 , Figure 9 and Figure 10As shown, the support frame 3 is fixedly connected to two symmetrically distributed third driving components 401. The third driving component 401 is an electric push rod. The telescopic end of the third driving component 401 is fixedly connected to a connecting frame 402. The connecting frame 402 consists of two symmetrically distributed limiting rings and a connecting frame. The distance between the two limiting rings is sufficient for the spline shaft 203 to be engaged. The connecting frame 402 is used to dock with the adjacent spline shaft 203. The telescopic end of the third driving component 401 can drive the corresponding spline shaft 203 to slide left and right through the connecting frame 402. The end of the spline shaft 203 away from the adjacent third driving component 401 is slidably connected to two centrally symmetrically distributed locking blocks 501. The two locking blocks 501 are initially located inside the corresponding spline shaft 203. In this embodiment, the grinding wheel of the grinding wheel set 6 is provided with two symmetrically distributed grooves in the middle. The locking blocks 501 are engaged in the grooves of the grinding wheel to divide the several grinding wheels of the grinding wheel set 6 into two groups. A push block 502 is fixedly connected. An elastic element 503 is provided between two adjacent locking blocks 501. The elastic element 503 is a tension spring. The elastic element 503 is used to drive the two symmetrically arranged locking blocks 501 to reset. A push shaft 504 is internally limited and slidably connected to the spline shaft 203. The end of the push shaft 504 near the two symmetrically distributed locking blocks 501 is an annular inclined surface. The push block 502 has an inclined surface that fits against the annular inclined surface of the push shaft 504. The push shaft 504 is used to press the two adjacent symmetrically distributed push blocks 502. An electromagnet 505 is fixedly connected to the connecting frame 402. The end of the push shaft 504 near the third driving member 401 is magnetic. The spline shaft 203 is not attracted by the electromagnet 505. For example, it is made of austenitic stainless steel. When the electromagnet 505 is energized, it will exert a force on the push shaft 504. The electromagnet 505 is used to drive the adjacent push shaft 504 to move, so that the push shaft 504 slides along the spline shaft 203.

[0031] Working principle: When the operator needs to disassemble the damaged grinding wheel set 6, rotating it from the front to the rear, the far ends of the two splined shafts 203 corresponding to the damaged grinding wheel set 6 align with the corresponding connecting brackets 402. At this time, the telescopic end of the third drive component 401 can drive the corresponding splined shafts 203 to move synchronously through the connecting brackets 402. Then, the operator rotates the two locking bolts 204 to release the compression of the adjacent splined shafts 203, releasing the lock between the sleeve 201 and the adjacent splined shafts 203. Then, the two third drive components 401 are activated, allowing the telescopic ends of the two third drive components 401 to push and pull the adjacent splined shafts 203 respectively through the connecting brackets 402. The telescopic ends of the two third drive components 401 move in the same direction and at the same speed. The two splined shafts 203 are always in a mating state until the mating point of the two splined shafts 203 moves to the middle of the damaged grinding wheel on the corresponding grinding wheel set 6. Assuming there are two damaged grinding wheels on the grinding wheel set 6, after the mating point of the two splined shafts 203 moves to the middle of the two damaged grinding wheels, the two third drive components 401 are closed, and then the two electromagnets 505 are turned on. The electromagnets 505 have magnetic force and push the adjacent push shaft 504 to slide. The push shaft 504 squeezes the two adjacent symmetrically distributed push blocks 502. The push blocks 502 are squeezed by the push shaft 504 and drive the corresponding locking blocks 501 to protrude from the adjacent splined shaft 203. At the same time, the elastic element 503 is stretched, so that the two symmetrically distributed locking blocks 501 on the two splined shafts 203 enter the groove of the grinding wheel on the corresponding grinding wheel set 6.

[0032] When the two symmetrically distributed locking blocks 501 on the two splined shafts 203 enter the grooves of the corresponding grinding wheels on the grinding wheel set 6, the operator rotates the rear threaded shaft 301. The two rear threaded shafts 301 together drive the two symmetrically distributed pushers 302 to move in opposite directions. The pushers 302 drive the corresponding sleeves 201 to move synchronously, so that the two sleeves 201 move in opposite directions to release the pressure on the grinding wheels on the adjacent grinding wheel set 6. This continues until the sleeves 201 move to their limit position. Then, the two third drive components 401 are activated again. The telescopic end of the third drive component 401 drives the adjacent splined shafts 203 to move synchronously through the connecting frame 402 on it. At this point, the two splined shafts 203 separate, and the splined shafts 203 divide the grinding wheels on the grinding wheel assembly 6 into two groups through the locking blocks 501 on them. When the separation distance between the two splined shafts 203 is convenient for the operator to replace the grinding wheels, the third drive component 401 is turned off (this distance is adjusted by the operator according to the actual situation). Then, the two electromagnets 505 are energized in the reverse direction. The electromagnets 505 attract the adjacent push shafts 504 to reset. The push shafts 504 release the pressure on the two adjacent push blocks 502. The elastic component 503 pulls the two locking blocks 501 into the corresponding splined shafts 203. Then, the operator replaces the damaged grinding wheels located on the two splined shafts 203.

[0033] After the grinding wheel is replaced, activate the two third drive units 401. The telescopic end of the third drive unit 401 drives the corresponding spline shaft 203 to return to its initial state via the connecting bracket 402. The two spline shafts 203 are then connected. Then, rotate the threaded shaft 301 on the rear side, so that the two threaded shafts 301 on the rear side drive the two symmetrically distributed pushers 302 to move in opposite directions. The two pushers 302 drive the adjacent sleeves 201 to move synchronously. The two sleeves 201 squeeze and push the dispersed grinding wheel until the grinding wheel is spliced ​​together. Then, stop rotating the threaded shaft 301 and reset and rotate the two locking bolts 204, so that the locking bolts 204 squeeze the corresponding spline shaft 203. The spline shaft 203 and the corresponding sleeve 201 are locked together. When it is necessary to replace the damaged grinding wheel on the grinding wheel set 6 again, repeat the above steps.

[0034] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A general-purpose motor shaft grinding device, comprising a supporting housing (1), a fixed platform (2) for fixing and rotating a motor shaft is provided on the supporting housing (1), a support frame (3) is provided on the supporting housing (1), and a rotating frame (4) is rotatably connected to the support frame (3), characterized in that: The rotating frame (4) is provided with two centrally symmetrically distributed transmission components (5). The transmission components (5) are provided with a grinding wheel set (6) for grinding the motor shaft. The support frame (3) is fixedly connected to a first driving component (7). The output shaft of the first driving component (7) is fixedly connected to a first gear (8). The rotating frame (4) is rotatably connected to two centrally symmetrically distributed second gears (9). Both second gears (9) mesh with the first gear (8). The two centrally symmetrically distributed second gears (9) are used to drive the corresponding transmission components (5) to rotate. The support frame (3) is fixedly connected to a second driving component (10). The output shaft of the second driving component (10) is fixedly connected to the rotating frame (4).

2. The universal motor shaft grinding device according to claim 1, characterized in that: Both second gears (9) are unidirectional gears, and the two second gears (9) drive the corresponding transmission member (5) to rotate in opposite directions.

3. The universal motor shaft grinding device according to claim 1, characterized in that: The grinding wheel assembly (6) is composed of several grinding wheel pieces spliced ​​together.

4. A universal motor shaft grinding device according to claim 3, characterized in that: The transmission component (5) consists of two sleeves (201), two transmission rings (202), and two splined shafts (203). Both transmission rings (202) are rotatably connected to the rotating frame (4), and the second gear (9) is used to drive the adjacent transmission rings (202) to rotate. The transmission rings (202) are splined connected to the adjacent sleeves (201), and the sleeves (201) are splined connected to the adjacent splined shafts (203). Both splined shafts (203) are provided with notches, and the notches of the two splined shafts (203) are used to connect with each other. Both splined shafts (203) are detachably connected to the grinding wheel assembly (6).

5. A universal motor shaft grinding device according to claim 4, characterized in that: The sleeve (201) is threadedly connected to a locking bolt (204), which is used to lock the sleeve (201) to the adjacent splined shaft (203).

6. A universal motor shaft grinding device according to claim 4, characterized in that: The rotating frame (4) is rotatably connected to four rectangularly distributed threaded shafts (301). The two adjacent threaded shafts (301) of the transmission component (5) are threadedly connected to two symmetrically distributed push frames (302). The push frames (302) are rotatably connected to the adjacent sleeve (201). A transmission module (303) is provided between the two adjacent threaded shafts (301) of the transmission component (5). The transmission module (303) is used to make the two adjacent threaded shafts (301) of the transmission component (5) rotate synchronously.

7. A universal motor shaft grinding device according to claim 4, characterized in that: The support frame (3) is fixedly connected to two symmetrically distributed third drive members (401), and the telescopic end of the third drive member (401) is fixedly connected to a connecting frame (402), which is used to dock with the adjacent spline shaft (203).

8. A universal motor shaft grinding device according to claim 7, characterized in that: The spline shaft (203) is slidably connected to two centrally symmetrically distributed locking blocks (501) at one end away from the adjacent third driving member (401). The locking blocks (501) are fixedly connected to push blocks (502), and elastic members (503) are provided between the two adjacent locking blocks (501).

9. A universal motor shaft grinding device according to claim 8, characterized in that: The spline shaft (203) is slidably connected to a push shaft (504), which is used to press two adjacent push blocks (502) that are symmetrically distributed at the center. The connecting frame (402) is fixedly connected to an electromagnet (505), which is used to drive the adjacent push shaft (504) to move.

10. A universal motor shaft grinding device according to claim 9, characterized in that: The push shaft (504) has an annular inclined surface at one end near the two correspondingly symmetrically distributed card blocks (501), and the push block (502) has an inclined surface that fits against the annular inclined surface of the push shaft (504).

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