Polishing device for motor rotating shaft

Abstract

The invention discloses a polishing device for a motor rotating shaft, and belongs to the technical field of polishing equipment.The polishing device for the motor rotating shaft comprises a working base, a fixing cavity is formed in the working base, a driving assembly is arranged in the fixing cavity, and a polishing assembly is fixedly installed in the driving assembly; a speed reduction assembly is arranged below the polishing assembly. A supporting frame is fixedly mounted on one side of the upper surface of the working base, a mounting plate is fixedly connected to the upper end of the supporting frame, a fixing seat is fixedly connected to the lower end of the mounting plate, a water flow control assembly is fixedly mounted in the fixing seat, and a rotating shaft fixing assembly is arranged at the lower end of the fixing seat. And a water supply assembly is mounted at the lower end of the rotating shaft fixing assembly. The impact force of the rotating shaft of the motor can be reduced through the matched speed reduction assembly and the supporting column, water resource waste of the device in the non-polishing period is avoided through the design of the water flow control assembly, and the utilization rate of water resources is effectively increased.

Description

Technical Field

[0001] The present invention belongs to the technical field of polishing equipment, and particularly relates to a polishing device for a motor shaft. Background Art

[0002] The motor shaft is one of the key components in a motor, usually a cylindrical shaft made of metal. During the operation of the motor, the shaft transmits the torque generated by the motor rotor to an external load to drive the load to operate. For example, in industrial production, equipment such as motor-driven conveyor belts, fans, and water pumps all transmit power to the corresponding loads through the motor shaft to complete various work tasks. The machining accuracy and surface quality of the motor shaft are crucial for the performance and operation stability of the motor. A high-precision shaft can ensure a uniform air gap between the rotor and the stator, reduce vibration and noise, and improve the efficiency and reliability of the motor. A polishing device for a motor shaft is a device used to polish the surface of the motor shaft to improve its surface finish, accuracy, and performance.

[0003] During the polishing process, a large amount of heat is generated due to the mutual friction between the polishing tool and the motor surface. If the heat is not dissipated in time, it may cause the surface temperature of the motor to be too high, which may further lead to changes in material properties, surface burns, and even affect the accuracy and performance of the motor. Spraying water on the workpiece during the polishing process can effectively absorb and carry away this heat, keeping the surface temperature of the motor within a reasonable range and protecting the material and performance of the motor.

[0004] When the existing polishing device is in processing, it usually installs a spray head above or on the side of the polishing area to evenly sprinkle water on the motor shaft in the form of spraying. However, when loading and unloading the motor shaft, the spray head still continuously supplies water until all the motor shafts are processed, which often causes waste of water resources and is not conducive to the sustainable use of resources. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a polishing device for a motor shaft.

[0006] The technical solution adopted to solve the above technical problems is as follows: A polishing device for a motor shaft, including a working base. An installation groove is opened at the upper end of the working base. A material receiving box is arranged in the installation groove. A handle is fixedly installed on one side of the material receiving box. A fixed cavity is opened in the working base. A driving component is arranged in the fixed cavity. A polishing component is fixedly installed in the driving component. A speed reducing component is arranged below the polishing component. A support frame is fixedly installed on one side of the upper surface of the working base. The upper end of the support frame is fixedly connected to a mounting plate. The lower end of the mounting plate is fixedly connected to a fixed seat. A water flow control component is fixedly installed in the fixed seat. A shaft fixing component is arranged at the lower end of the fixed seat. A water supply component is installed at the lower end of the shaft fixing component. The shaft fixing component includes a polishing seat fixedly connected to the fixed seat. A polishing groove is opened in the polishing seat. A shaft is arranged in the polishing groove.

[0007] Through the above technical solution, the water flow control component can not only automatically adjust the water outlet state of the nozzle according to the polishing state of the motor shaft, but also provide a thrust for the shaft when the shaft is unloaded, so that the shaft can fall into the material receiving box through the speed reducing component. The automation degree of the whole device is relatively high.

[0008] Further, the driving component includes a first driving motor fixedly installed in the fixed cavity. A driving gear is fixedly installed at the output end of the first driving motor. Driven gears are symmetrically arranged on both sides of the driving gear. The two driven gears are respectively in meshing transmission with the driving gear. The driven gears are rotatably connected to the working base. A threaded rod is fixedly connected to the central position of the driven gear. A silk cylinder is threadedly connected to the threaded rod. The silk cylinder is fixedly connected to a moving seat. A connecting ring is rotatably connected to the moving seat. A gear ring is fixedly installed on the outer side of the connecting ring. A driving gear is arranged in meshing transmission on one side of the gear ring. The lower end of the driving gear is fixedly installed at the output end of a second driving motor. The second driving motor is fixedly connected to the moving seat.

[0009] Through the above technical solution, the first driving motor drives the driving gear to rotate. The driving gear drives the driven gears on both sides to rotate synchronously through meshing. Due to the threaded transmission between the threaded rod and the silk cylinder, the silk cylinder drives the moving seat to move upward.

[0010] Further, the speed reducing component includes a connecting frame fixedly installed on the inner wall of the moving seat. The end of the connecting frame away from the moving seat is fixedly installed with a buffer seat. A plurality of connecting grooves are evenly opened in the circumferential direction in the buffer seat. Mounting protrusions are slidably connected in the plurality of connecting grooves. One end of the mounting protrusion is fixedly connected to a fixing spring. The end of the fixing spring away from the mounting protrusion is fixedly installed with the buffer seat. One side of the mounting protrusion is arranged in an arc shape.

[0011] Through the above technical solution, after the motor shaft is processed and loses its fixation and naturally falls due to gravity, the deceleration component can reduce the impact force of the motor shaft, avoiding deformation or damage of the precision structures inside the motor shaft, such as the bearing installation parts and keyways, due to excessive impact.

[0012] Further, the polishing component includes a positioning seat fixedly installed on the inner wall of the connecting ring. A slide rail is fixedly installed at the upper end of the positioning seat. A slide seat is slidably connected to the slide rail. One end of the slide seat is fixedly connected to a support block. A polishing head is fixedly connected to the support block. The other end of the polishing head is fixedly connected to the output end of a second hydraulic cylinder. The second hydraulic cylinder is fixedly installed between the positioning seats.

[0013] Through the above technical solution, the output end of the second hydraulic cylinder drives the slide seat to slide along the slide rail, and the polishing head approaches the shaft to polish the shaft.

[0014] Further, the water flow control component includes a fixed sleeve fixedly connected to the fixed seat. A connecting shell is fixedly installed at one end of the fixed sleeve. A moving block is slidably connected inside the fixed sleeve. One end of the moving block is fixedly connected to a top column. A communication hole is opened in the moving block. Water flow holes are opened on both sides of the fixed sleeve. One end of the moving block is fixedly connected to an installation spring. The other end of the installation spring is fixed to the connecting shell.

[0015] Through the above technical solution, when the shaft is inserted, it can push the top column to slide into the fixed sleeve. The top column drives the moving block to move, making the communication hole align with the water outlet pipes and the connecting pipe on both sides, forming a passage between the water outlet pipe and the connecting pipe. When the shaft processing is completed, the installation spring pushes the top column to move, causing the position of the communication hole to move, closing the passage between the water outlet pipe and the connecting pipe, and the water flow no longer circulates.

[0016] Further, the water supply component includes a diversion seat fixedly connected to the shaft fixing component. A circulation cavity is opened in the diversion seat. A plurality of spray heads are evenly and fixedly connected to the inner side of the diversion seat. A water tank is fixedly connected to the upper end of the installation plate. A water outlet pipe is fixedly installed on one side of the water tank. The other end of the water outlet pipe is fixedly connected to the water flow control component. A water pump is installed on the water outlet pipe. A connecting pipe is fixedly connected to the side of the water flow control component away from the water outlet pipe. A diversion cavity is opened on one side inside the polishing seat.

[0017] Through the above technical solution, the water flow in the water tank can be pumped into the passage by the water pump, then flows into the circulation cavity in the diversion seat through the diversion cavity, and is sprayed onto the middle shaft through a plurality of spray heads.

[0018] Further, the connecting pipe is mutually communicated with the diversion cavity and the circulation cavity, and the plurality of spray heads are inclinedly installed.

[0019] Through the above technical solution, a passage is formed between the water outlet pipe and the connecting pipe. The water flow in the water tank is pumped into the passage by a water pump, and then sprayed onto the middle rotating shaft through multiple nozzles. When unloading after the motor rotating shaft is processed, the passage between the water outlet pipe and the connecting pipe is closed, avoiding water resource waste during non-polishing periods and effectively improving the utilization rate of water resources.

[0020] Further, a positioning cavity is provided in the polishing seat, and first hydraulic cylinders are symmetrically and fixedly connected in the positioning cavity. The output ends of the two first hydraulic cylinders are respectively fixedly connected with limiting rings, and the two limiting rings are slidably connected to the polishing seat.

[0021] Through the above technical solution, the first hydraulic cylinder drives the limiting ring to move towards the middle position, and the limiting ring can limit the position of the rotating shaft.

[0022] The beneficial effects of the present invention are as follows: (1) By designing a supporting deceleration component and a top column, after the motor rotating shaft is processed and loses its fixation and naturally falls due to gravity, the deceleration component can reduce the impact force of the motor rotating shaft, avoiding deformation or damage of the precision structures inside the motor shaft, such as the bearing installation part and keyway, due to excessive impact; (2) By designing a water flow control component, when the motor rotating shaft is installed and processed, a passage is formed between the water outlet pipe and the connecting pipe. The water flow in the water tank is pumped into the passage by a water pump, and then sprayed onto the middle rotating shaft through multiple nozzles. When unloading after the motor rotating shaft is processed, the passage between the water outlet pipe and the connecting pipe is closed, avoiding water resource waste during non-polishing periods and effectively improving the utilization rate of water resources; (3) By adopting a supporting water flow control component, it can not only automatically adjust the water outlet state of the nozzle according to the polishing state of the motor rotating shaft, but also provide a thrust for the rotating shaft when the rotating shaft is unloaded, so that the rotating shaft can fall into the receiving box through the deceleration component, and the automation degree of the whole device is relatively high. Description of the Drawings

[0023] Figure 1 is the first perspective three-dimensional structure diagram of the present invention; Figure 2 is the second perspective three-dimensional structure diagram of the present invention; Figure 3 is the sectional view of the present invention; Figure 4 is the sectional view of the water flow control component and the rotating shaft fixing group of the present invention; Figure 5 is the internal structure diagram of the water flow control component of the present invention; Figure 6 is the present invention Figure 3 is the enlarged view of the structure at A of the present invention; Figure 7 is the three-dimensional structure diagram of the drive component of the present invention; Figure 8 is a three-dimensional structure diagram of the polishing component of the present invention; Figure 9 is a cross-sectional view of the moving seat of the present invention; Figure 10 is the present invention Figure 9 enlarged view of the structure at position B.

[0024] Reference numerals: 1, working base; 11, mounting groove; 12, material receiving box; 13, handle; 14, fixed cavity; 15, support frame; 16, mounting plate; 17, rotating shaft; 18, fixed seat; 2, driving assembly; 20, first driving motor; 21, driving gear; 22, driven gear; 23, threaded rod; 24, wire cylinder; 25, moving seat; 26, connecting ring; 27, gear ring; 28, driving gear; 29, second driving motor; 3, decelerating assembly; 30, connecting frame; 31, buffer seat; 32, connecting groove; 33, mounting projection; 34, fixing spring; 4, water supply assembly; 40, water tank; 41, water outlet pipe; 42, water pump; 43, connecting pipe; 44, diversion cavity; 45, diversion seat; 46, flow cavity; 47, nozzle; 5, water flow control assembly; 50, fixing sleeve; 51, connecting shell; 52, moving block; 53, ejector pin; 54, mounting spring; 55, communication hole; 6, rotating shaft fixing assembly; 60, polishing seat; 61, polishing groove; 62, positioning cavity; 63, first hydraulic cylinder; 64, limiting ring; 7, polishing assembly; 70, positioning seat; 71, slide rail; 72, sliding seat; 73, support block; 74, second hydraulic cylinder; 75, polishing head. Detailed implementation manners

[0025] In order 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 accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0026] As Figures 1-3As shown in the figure, a polishing device for a motor shaft in this embodiment includes a working base 1. An installation groove 11 is opened at the upper end of the working base 1. A material receiving box 12 is arranged in the installation groove 11. A handle 13 is fixedly installed on one side of the material receiving box 12. A fixed cavity 14 is opened in the working base 1. A driving component 2 is arranged in the fixed cavity 14. A polishing component 7 is fixedly installed in the driving component 2. A speed reducing component 3 is arranged below the polishing component 7. On one side of the upper surface of the working base 1, a support frame 15 is fixedly installed. The upper end of the support frame 15 is fixedly connected to a mounting plate 16. The lower end of the mounting plate 16 is fixedly connected to a fixed seat 18. A water flow control component 5 is fixedly installed in the fixed seat 18. A rotating shaft fixing component 6 is arranged at the lower end of the fixed seat 18. A water supply component 4 is installed at the lower end of the rotating shaft fixing component 6. The rotating shaft fixing component 6 includes a polishing seat 60 fixedly connected to the fixed seat 18. A polishing groove 61 is opened in the polishing seat 60. A rotating shaft 17 is arranged in the polishing groove 61. The water flow control component 5 can not only automatically adjust the water output state of the nozzle 47 according to the polishing state of the motor shaft, but also provide a thrust for the rotating shaft 17 when the rotating shaft 17 is unloaded, so that the rotating shaft 17 can fall into the material receiving box 12 through the speed reducing component 3. The degree of automation of the whole device is relatively high.

[0027] As Figures 1-8 shown in the figure, the driving component 2 includes a first driving motor 20 fixedly installed in the fixed cavity 14. A driving gear 21 is fixedly installed at the output end of the first driving motor 20. Two driven gears 22 are symmetrically arranged on both sides of the driving gear 21. The two driven gears 22 are respectively in meshing transmission with the driving gear 21. The driven gears 22 are rotatably connected to the working base 1. A threaded rod 23 is fixedly connected to the central position of the driven gear 22. A lead screw cylinder 24 is threadedly connected to the threaded rod 23. The lead screw cylinder 24 is fixedly connected to a moving seat 25. A connecting ring 26 is rotatably connected to the moving seat 25. A gear ring 27 is fixedly installed on the outer side of the connecting ring 26. A driving gear 28 is arranged on one side of the gear ring 27 in meshing transmission. The lower end of the driving gear 28 is fixedly installed at the output end of a second driving motor 29. The second driving motor 29 is fixedly connected to the moving seat 25. The first driving motor 20 drives the driving gear 21 to rotate. The driving gear 21 drives the two driven gears 22 on both sides to rotate synchronously through meshing. Due to the threaded transmission between the threaded rod 23 and the lead screw cylinder 24, the lead screw cylinder 24 drives the moving seat 25 to move upward. The polishing component 7 includes a positioning seat 70 fixedly installed on the inner wall of the connecting ring 26. A slide rail 71 is fixedly installed at the upper end of the positioning seat 70. A sliding seat 72 is slidably connected to the slide rail 71. One end of the sliding seat 72 is fixedly connected to a support block 73. A polishing head 75 is fixedly connected to the support block 73. The other end of the polishing head 75 is fixedly connected to the output end of a second hydraulic cylinder 74. The second hydraulic cylinder 74 is fixedly installed between the positioning seat 70. The output end of the second hydraulic cylinder 74 drives the sliding seat 72 to slide along the slide rail 71. The polishing head 75 approaches the rotating shaft 17 to polish the rotating shaft 17.

[0028] As shown Figures 1-10 in FIG. 3, the deceleration assembly 3 includes a connecting frame 30 fixedly installed on the inner wall of the moving seat 25. One end of the connecting frame 30 away from the moving seat 25 is fixedly installed with a buffer seat 31. A plurality of connecting grooves 32 are evenly formed in the inner circumference of the buffer seat 31. An installation protrusion 33 is slidably connected in the plurality of connecting grooves 32. One end of the installation protrusion 33 is fixedly connected with a fixing spring 34. The other end of the fixing spring 34 away from the installation protrusion 33 is fixedly installed with the buffer seat 31. One side of the installation protrusion 33 is arc-shaped. After the motor rotating shaft is processed and loses its fixation and naturally falls due to gravity, the deceleration assembly 3 can reduce the impact force of the motor rotating shaft, avoiding deformation or damage of the precision structures inside the motor shaft, such as the bearing installation part and the keyway, due to excessive impact.

[0029] As shown Figures 1-6 in FIG. 4, the water flow control assembly 5 includes a fixing sleeve 50 fixedly connected with the fixing seat 18. One end of the fixing sleeve 50 is fixedly installed with a connecting shell 51. A moving block 52 is slidably connected in the fixing sleeve 50. One end of the moving block 52 is fixedly connected with a top column 53. A communication hole 55 is formed in the moving block 52. Water flow holes are formed on both sides of the fixing sleeve 50. One end of the moving block 52 is fixedly connected with an installation spring 54. The other end of the installation spring 54 is fixed with the connecting shell 51. When the rotating shaft 17 is inserted, it can push the top column 53 to slide into the fixing sleeve 50. The top column 53 drives the moving block 52 to move, so that the communication hole 55 is aligned with the water outlet pipes 41 and the connecting pipes 43 on both sides, forming a passage between the water outlet pipes 41 and the connecting pipes 43. When the rotating shaft 17 is processed, the installation spring 54 pushes the top column 53 to move, so that the position of the communication hole 55 moves, and the passage between the water outlet pipes 41 and the connecting pipes 43 is closed, and the water flow no longer circulates; the water supply assembly 4 includes a diversion seat 45 fixedly connected with the rotating shaft fixing assembly 6. A circulation cavity 46 is formed in the diversion seat 45. A plurality of spray heads 47 are evenly and fixedly connected to the inner side of the diversion seat 45. A water tank 40 is fixedly connected to the upper end of the installation plate 16. One side of the water tank 40 is fixedly installed with a water outlet pipe 41. The other end of the water outlet pipe 41 is fixedly connected with the water flow control assembly 5. A water pump 42 is installed on the water outlet pipe 41. One side of the water flow control assembly 5 away from the water outlet pipe 41 is fixedly connected with a connecting pipe 43. A diversion cavity 44 is formed on one side inside the polishing seat 60. The water flow in the water tank 40 can be pumped into the passage through the water pump 42, then flows into the circulation cavity 46 in the diversion seat 45 through the diversion cavity 44, and is sprayed onto the middle rotating shaft 17 through the plurality of spray heads 47.

[0030] As shown Figures 1-6As shown, the connecting pipe 43 is interconnected with the diversion cavity 44 and the circulation cavity 46. A plurality of nozzles 47 are installed obliquely. A passage is formed between the water outlet pipe 41 and the connecting pipe 43. The water flow in the water tank 40 is pumped into the passage by the water pump 42, and then sprayed onto the middle rotating shaft 17 through the plurality of nozzles 47. When the motor rotating shaft is processed and unloaded, the passage between the water outlet pipe 41 and the connecting pipe 43 is closed, avoiding water resource waste during non-polishing periods and effectively improving the utilization rate of water resources.

[0031] As Figures 1-4 shown, a positioning cavity 62 is formed in the polishing seat 60. First hydraulic cylinders 63 are symmetrically and fixedly connected in the positioning cavity 62. Output ends of the two first hydraulic cylinders 63 are respectively fixedly connected with limiting rings 64. The two limiting rings 64 are slidably connected with the polishing seat 60. The first hydraulic cylinders 63 drive the limiting rings 64 to move towards the middle position, and the limiting rings 64 can limit the position of the rotating shaft 17.

[0032] The working principle of this embodiment is as follows. The rotating shaft 17 is inserted into the polishing groove 61. At the same time, the first hydraulic cylinders 63 are started. The first hydraulic cylinders 63 drive the limiting rings 64 to move towards the middle position to limit the position of the rotating shaft 17. At this time, when the rotating shaft 17 is inserted, it pushes the ejector pin 53 to slide into the fixed sleeve 50. The ejector pin 53 drives the moving block 52 to move, so that the communication holes 55 are aligned with the water outlet pipes 41 and the connecting pipe 43 on both sides, forming a passage between the water outlet pipe 41 and the connecting pipe 43. The water flow in the water tank 40 is pumped into the passage by the water pump 42, then flows into the circulation cavity 46 in the diversion seat 45 through the diversion cavity 44, and is then sprayed onto the middle rotating shaft 17 through the plurality of nozzles 47; The power supply of the first driving motor 20 is started. The first driving motor 20 drives the driving gear 21 to rotate. The driving gear 21 drives the driven gears 22 on both sides to rotate synchronously through meshing. Since the threaded rod 23 and the screw cylinder 24 are in threaded transmission, the screw cylinder 24 drives the moving seat 25 to move upward. When the moving seat 25 moves to the bottom end of the rotating shaft 17, the output end of the second hydraulic cylinder 74 drives the polishing head 75 to approach the rotating shaft 17. At the same time, the output end of the second driving motor 29 drives the driving gear 28 to rotate, so that the polishing heads 75 on the connecting ring 26 rotate accordingly to polish the rotating shaft 17; When the processing of the rotating shaft 17 is completed, the limiting rings 64 retract. The rotating shaft 17 naturally drops to the middle of the deceleration assembly 3 due to gravity. The mounting spring 54 pushes the ejector pin 53 to move, so that the position of the communication hole 55 moves, and the passage between the water outlet pipe 41 and the connecting pipe 43 is closed, and the water flow no longer circulates, so that the nozzles 47 stop spraying water; at the same time, the ejector pin 53 is pushed outwards to push one end of the rotating shaft 17, and the mounting protrusion 33 is compressed by the pressure and slides into the connecting groove 32 by compressing the fixing spring 34, so that the rotating shaft 17 can fall into the receiving box 12 through the deceleration assembly 3.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention.

Claims

1. A polishing device for a motor shaft, comprising a working base (1), characterized in that: The working base (1) has an installation groove (11) at its upper end, a material receiving box (12) is arranged in the installation groove (11), a handle (13) is fixedly mounted on one side of the material receiving box (12), a fixed cavity (14) is arranged in the working base (1), a driving component (2) is arranged in the fixed cavity (14), a polishing component (7) is fixedly mounted in the driving component (2), and a speed reduction component (3) is arranged below the polishing component (7); A support frame (15) is fixedly mounted on one side of the upper surface of the working base (1); a mounting plate (16) is fixedly connected to the upper end of the support frame (15); a fixing seat (18) is fixedly connected to the lower end of the fixing plate (16); a water flow control component (5) is fixedly mounted in the fixing seat (18); a rotating shaft fixing component (6) is arranged at the lower end of the fixing seat (18); and a water supply component (4) is installed at the lower end of the rotating shaft fixing component (6); The rotating shaft fixing assembly (6) comprises a polishing seat (60) fixedly connected to the fixing seat (18), a polishing groove (61) is provided in the polishing seat (60), and a rotating shaft (17) is arranged in the polishing groove (61).

2. The polishing device for a motor shaft according to claim 1, characterized in that: The driving assembly (2) comprises a first driving motor (20) fixedly mounted on the fixed cavity (14); a driving gear (21) is fixedly mounted on the output end of the first driving motor (20); driven gears (22) are symmetrically arranged on both sides of the driving gear (21); the two driven gears (22) are respectively meshed with the driving gear (21) for transmission; the driven gears (22) are rotationally connected to the working base (1); a threaded rod (23) is fixedly connected to the center of the driven gear (22); A threaded cylinder (24) is threadedly connected to the threaded rod (23); the threaded cylinder (24) is fixedly connected to the movable seat (25); a connecting ring (26) is rotatably connected to the movable seat (25); a gear ring (27) is fixedly mounted on the outer side of the connecting ring (26); a driving gear (28) is meshingly provided on one side of the gear ring (27); a lower end of the driving gear (28) is fixedly mounted to an output end of a second drive motor (29); and the second drive motor (29) is fixedly connected to the movable seat (25).

3. The polishing device for a motor shaft according to claim 2, characterized in that: The deceleration assembly (3) comprises a connecting frame (30) fixedly mounted on the inner wall of the moving seat (25); the connecting frame (30) is fixedly mounted between an end away from the moving seat (25) and a buffer seat (31); a plurality of connecting grooves (32) are evenly arranged on the inner circumference of the buffer seat (31); a plurality of mounting protrusions (33) are slidably connected in the plurality of connecting grooves (32); a fixing spring (34) is fixedly connected to one end of the mounting protrusion (33); the fixing spring (34) is fixedly mounted between an end away from the mounting protrusion (33) and the buffer seat (31); and one side of the mounting protrusion (33) is arranged in an arc shape.

4. The polishing device for a motor shaft according to claim 2, characterized in that: The polishing assembly (7) comprises a positioning seat (70) fixedly mounted on the inner wall of the connecting ring (26); a slide rail (71) is fixedly mounted on the upper end of the positioning seat (70); a slide seat (72) is slidably connected to the slide rail (71); one end of the slide seat (72) is fixedly connected to a support block (73); a polishing head (75) is fixedly connected to the support block (73); the other end of the polishing head (75) is fixedly connected to the output end of a second hydraulic cylinder (74); and the second hydraulic cylinder (74) is fixedly mounted between the positioning seat (70).

5. The polishing device for a motor shaft according to claim 1, characterized in that: The water flow control component (5) comprises a fixing sleeve (50) fixedly connected to the fixing seat (18), a connecting shell (51) fixedly mounted on one end of the fixing sleeve (50), a moving block (52) slidably connected inside the fixing sleeve (50), a top column (53) fixedly connected to one end of the moving block (52), a connecting hole (55) formed inside the moving block (52), water flow holes formed on both sides of the fixing sleeve (50), a mounting spring (54) fixedly connected to one end of the moving block (52), and the other end of the mounting spring (54) fixed to the connecting shell (51).

6. The polishing device for a motor shaft according to claim 1, characterized in that: The water supply assembly (4) comprises a flow guide seat (45) fixedly connected to the rotating shaft fixing assembly (6), a flow chamber (46) being provided in the flow guide seat (45), a plurality of nozzles (47) being evenly fixedly connected to the inner side of the flow guide seat (45), a water tank (40) being fixedly connected to the upper end of the mounting plate (16), a water outlet pipe (41) being fixedly installed on one side of the water tank (40), the other end of the water outlet pipe (41) being fixedly connected to the water flow control assembly (5), a water pump (42) being installed on the water outlet pipe (41), a connecting pipe (43) being fixedly connected to the side of the water flow control assembly (5) away from the water outlet pipe (41), and a flow guide chamber (44) being provided in one side of the polishing seat (60).

7. The polishing device for a motor shaft according to claim 6, characterized in that: The connecting pipe (43) is interconnected with the flow guide cavity (44) and the flow cavity (46), and the plurality of nozzles (47) are installed at an angle.

8. The polishing device for a motor shaft according to claim 1, characterized in that: A positioning cavity (62) is provided in the polishing seat (60), and first hydraulic cylinders (63) are symmetrically fixedly connected in the positioning cavity (62). Output ends of two first hydraulic cylinders (63) are respectively fixedly connected to limiting rings (64), and the two limiting rings (64) are slidably connected to the polishing seat (60).

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