Omnibearing sand blasting machine for motor shaft machining and method thereof

Abstract

The all-dimensional sand blasting machine comprises a sand blasting protection barrel, an upper positioning disc is vertically and movably connected to the upper end of the inner side of the sand blasting protection barrel, a lower positioning disc is fixedly arranged at the lower end of the inner side of the sand blasting protection barrel, and positioning barrels are arranged on the peripheries of the upper positioning disc and the lower positioning disc in a penetrating mode; a locking assembly used for fixing a motor shaft is arranged on the inner side of the positioning cylinder, the upper positioning disc and the lower positioning disc are each of a hollow structure, and first rotating shafts are rotationally arranged on the inner side of the upper positioning disc and the inner side of the lower positioning disc. According to the all-dimensional sand blasting machine for machining the motor shaft, through mutual cooperation of the upper positioning disc, the lower positioning disc, the positioning barrel, the locking assembly, the air cylinder and the spraying disc, all-dimensional sand blasting of the motor shaft can be achieved, the fixing position of the end of the motor shaft can be switched only by automatically controlling the upper positioning disc to move downwards, the operation is completed in one step, the efficiency is improved, and the labor intensity is relieved. The use is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of motor shaft processing, in particular to an omnidirectional sandblasting machine and a method for processing a motor shaft. Background Art

[0002] In the precision machining process of motor shafts, sandblasting is a key post-processing step. Its main purpose is to remove oxide scale, burrs, rust and machining residues on the surface of the shaft. At the same time, through the impact of high-speed sand particles, a uniform micro-profile with a certain degree of roughness is formed on the shaft surface. This treatment not only significantly improves the appearance quality of the shaft, but more importantly, it greatly enhances the adhesion of subsequent coatings or anti-rust treatments, and can improve the stress distribution state on the shaft surface to a certain extent, thereby effectively improving the fatigue resistance, corrosion resistance and overall operational reliability of the motor shaft. Therefore, the sandblasting process is crucial to ensure that the motor shaft meets high standards of performance and service life requirements.

[0003] However, existing conventional sandblasting equipment has significant drawbacks when applied to workpieces such as slender motor shafts. The typical operation method is to clamp one or both ends of the motor shaft with a fixture for fixation, and then perform sandblasting. The core problem is that the fixture will inevitably block the clamped shaft end area, resulting in these covered areas being unable to contact the jet beam, thus forming a sandblasting blind area. In order to ensure the complete treatment effect of the shaft surface, the operator has to remove the fixture after the first sandblasting is completed, and perform a second sandblasting on these covered shaft end areas. This repeated clamping, disassembly and separate processing steps not only greatly increases the complexity of the operation, but also significantly extends the single-piece processing time, seriously restricting the overall efficiency and production capacity of the production line, while increasing labor costs and the difficulty of process control.

[0004] Therefore, it is necessary to propose an omnidirectional sandblasting machine and method for motor shaft processing to solve the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide an omnidirectional sandblasting machine and method for motor shaft processing, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: The cam is fixed on the lower end of the inner side of the sandblasting casing, and the lower end of the inner side of the sandblasting casing is fixed with a lower positioning plate. The peripheries of the upper positioning plate and the lower positioning plate are penetrated by a positioning cylinder. A locking assembly for fixing the motor shaft is provided on the inner side of the positioning cylinder. The upper positioning plate and the lower positioning plate are both hollow structures, and the inner sides of the upper positioning plate and the lower positioning plate are rotatably provided with a first rotating shaft, a gear is provided on the first rotating shaft, a gear ring is fixed on the outer side of the positioning cylinder, a motor for driving the first rotating shaft to rotate is provided on the opposite sides of the upper positioning plate and the lower positioning plate, and a cylinder for driving the upper positioning plate to rise and fall is provided on the upper end of the sandblasting casing; The locking assembly includes a groove provided on the inner wall of the positioning cylinder, a locking arm is rotatably provided inside the groove, one end of the locking arm extends into the inner cavity of the positioning cylinder, and the bracket extending into the inner cavity of the positioning cylinder is tilted upward, and the locking arms are an even number and correspond to each other in pairs; A jet disc is provided between the upper positioning disc and the lower positioning disc, a side of the jet disc is provided with a jet port corresponding to the positioning cylinder, and one side of the jet disc is provided with a sand supply pipe extending to the outside of the sandblasting sleeve and used for connecting to an external sand box.

[0007] Preferably, a bracket is provided on the outside of the sandblasting casing, the bracket is a laterally arranged "concave" structure, and the gap between the bottom of the sandblasting casing and the lower end of the bracket is greater than the length of the motor shaft.

[0008] Preferably, a traction frame is provided on the top of the upper positioning plate, the motor at the upper end of the upper positioning plate is located below the traction frame, the upper end of the sandblasting casing is provided with a mounting frame, the cylinder is installed on the upper end of the mounting frame, and the output shaft of the cylinder is bolted to the traction frame.

[0009] Preferably, a second rotating shaft is rotatably provided inside the groove, one end of the locking arm is fixed on the second rotating shaft, and a torsion spring is installed between the end of the second rotating shaft and the inner wall of the groove.

[0010] Preferably, a pin is rotatably provided at one end of the locking arm away from the second rotating shaft, and a roller is provided on the pin.

[0011] Preferably, a screw rod is provided in the middle portion between the upper positioning plate and the lower positioning plate, the lower end of the screw rod extends to the inner side of the lower positioning plate and is connected to the first rotating shaft at the lower end in one-way rotation through a one-way bearing, a second guide groove is provided on the top of the screw rod, a second guide rod is vertically movably connected to the inner side of the second guide groove, and the upper end of the second guide rod extends to the inner side of the upper positioning plate and is connected to the first rotating shaft at the upper end in one-way rotation through a one-way bearing, and the injection plate is threadedly connected to the outer side of the screw rod.

[0012] Preferably, a guide column is fixedly provided on the top of the lower positioning plate, a first guide groove is provided on the upper end of the guide column, a first guide rod corresponding to the guide column is fixed on the bottom of the upper positioning plate, and the lower end of the first guide rod is movably connected to the inner side of the first guide groove, and the injection plate is movably sleeved on the guide column.

[0013] Preferably, the side surfaces of the sandblasting casing are evenly provided with through grooves corresponding to the edges of the lower positioning plate, and the outer side of the lower end of the sandblasting casing is detachably provided with receiving grooves corresponding to the through grooves.

[0014] Preferably, a sand retaining shell is provided on the outer side of the lower end of the sandblasting casing, which is located at the top of the receiving groove and corresponds to the through groove. The sand retaining shell is annular and has an open bottom.

[0015] The present application also relates to an embodiment, specifically a full-range sandblasting method for motor shaft processing, comprising the following steps: S1: The motor shaft is inserted into the positioning cylinder on the lower positioning plate from the bottom of the sandblasting casing, locked by the locking assembly, and the motor shaft is pushed upward so that the lower end of the motor shaft is located inside the positioning cylinder; S2: The sand supply pipe is connected to the sand box to control the motor at the bottom of the lower positioning plate. The motor drives the gear in the lower positioning plate to rotate. The gear drives multiple positioning cylinders to rotate through the ring gear, thereby realizing the rotation of multiple motor shafts. During this period, due to the rotation of the gear, the screw will rotate, and the upper end of the second guide rod will rotate relative to the first rotating shaft on the upper positioning plate. Due to the rotation of the screw, the spray plate will move longitudinally, and sand will be sprayed on the motor shaft through the spray port. S3: After the sandblasting is completed, the cylinder drives the upper positioning plate to move downward, and the first guide rod and the second guide rod are moved and contracted with the guide column and the screw rod. The upper end of the motor shaft enters the positioning cylinder on the upper positioning plate and is locked by the locking assembly. Then the cylinder drives the upper positioning plate to rise again, and the lower end of the motor shaft is disengaged from the inner side of the positioning cylinder on the lower positioning plate. Then, the motor on the upper positioning plate drives the upper gear to rotate, and the upper gear drives the positioning cylinder to rotate through the gear ring, thereby realizing the rotation of the motor shaft again. At this time, the first rotating shaft at the upper end drives the screw rod to rotate, and the lower end of the screw rod rotates relative to the first rotating shaft at the lower end. The motor shaft is also sandblasted by the jet port. S4: After the sandblasting is completed, pull out the motor shaft from the upper end of the upper positioning plate; S5: The ejected sand particles are discharged through the through slot, blocked by the sand retaining shell, and then collected by the receiving trough.

[0016] Compared with the prior art, the present invention provides an omnidirectional sandblasting machine and method for motor shaft processing, which has the following beneficial effects: The all-round sandblasting machine for motor shaft processing can realize comprehensive sandblasting of the motor shaft through the cooperation of the upper positioning plate, lower positioning plate, positioning cylinder, locking assembly, cylinder and spray plate. The fixed position of the motor shaft end can be switched by automatically controlling the downward movement of the upper positioning plate, which is a one-step process, improves efficiency and is easy to use. When the motor shaft rotates, the spray plate can be synchronously moved up and down, which increases linkage and has a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a structural diagram of the sandblasting casing, the upper positioning plate, and the lower positioning plate of the present invention in a disassembled state; Figure 3 This is a schematic diagram of the structure of the upper positioning plate and the lower positioning plate of the present invention in a coordinated state; Figure 4 This invention Figure 3 Schematic diagram of the structure in the disassembled state; Figure 5 This invention Figure 4 A structural diagram from another perspective based on the above; Figure 6 It is a schematic diagram of the cross-sectional structure of the positioning cylinder of the present invention.

[0018] In the figure: 1. bracket; 2. sandblasting casing; 3. mounting frame; 4. sand retaining shell; 5. receiving groove; 6. cylinder; 7. traction frame; 8. through groove; 9. first guide groove; 10. second guide groove; 11. upper positioning plate; 12. lower positioning plate; 13. motor; 14. sand supply pipe; 15. positioning cylinder; 16. injection plate; 17. first rotating shaft; 18. gear; 19. gear ring; 20. screw rod; 21. guide column; 22. injection port; 23. first guide rod; 24. second guide rod; 25. groove; 26. second rotating shaft; 27. torsion spring; 28. locking arm; 29. ​​pin; 30. roller. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figures 1-6As shown, an all-round sandblasting machine for motor shaft processing includes a sandblasting casing 2, a bracket 1 is provided on the outside of the sandblasting casing 2, the bracket 1 is a horizontally arranged "concave" structure, and the gap between the bottom of the sandblasting casing 2 and the lower end of the bracket 1 is greater than the length of the motor shaft, which is convenient for bottom loading. The upper end of the inner side of the sandblasting casing 2 is vertically movably connected with an upper positioning plate 11, and the lower end of the inner side of the sandblasting casing 2 is fixedly provided with a lower positioning plate 12. The peripheries of the upper positioning plate 11 and the lower positioning plate 12 are penetrated by a positioning cylinder 15, and a locking component for fixing the motor shaft is provided on the inside of the positioning cylinder 15. The locking component includes a device A groove 25 is placed on the inner wall of the positioning cylinder 15, and a locking arm 28 is rotatably provided on the inner side of the groove 25. One end of the locking arm 28 extends to the inner cavity of the positioning cylinder 15, and the bracket 1 extending to the inner cavity of the positioning cylinder 15 is tilted upward. There are an even number of locking arms 28, and they correspond to each other. A second rotating shaft 26 is rotatably provided on the inner side of the groove 25, and one end of the locking arm 28 is fixed on the second rotating shaft 26, and a torsion spring 27 is installed between the end of the second rotating shaft 26 and the inner wall of the groove 25. A pin 29 is rotatably provided on the end of the locking arm 28 away from the second rotating shaft 26, and a roller 30 is provided on the pin 29.

[0021] The upper positioning plate 11 and the lower positioning plate 12 are both hollow structures, and the inner sides of the upper positioning plate 11 and the lower positioning plate 12 are rotatably provided with a first rotating shaft 17, a gear 18 is provided on the first rotating shaft 17, and a gear ring 19 meshing with the gear 18 is fixed to the outer side of the positioning cylinder 15. The upper positioning plate 11 and the lower positioning plate 12 are provided on the opposite sides thereof with a motor 13 for driving the first rotating shaft 17 to rotate. The upper end of the sandblasting casing 2 is provided with a cylinder 6 for driving the upper positioning plate 11 to rise and fall. Specifically, a traction frame 7 is provided on the top of the upper positioning plate 11. The motor 13 at the upper end of the upper positioning plate 11 is located below the traction frame 7. The upper end of the sandblasting casing 2 is provided with a mounting frame 3. The cylinder 6 is mounted on the upper end of the mounting frame 3, and the output shaft of the cylinder 6 is bolted to the traction frame 7. An injection disc 16 is provided between the upper positioning disc 11 and the lower positioning disc 12. A side of the injection disc 16 is provided with an injection port 22 corresponding to the positioning cylinder 15. One side of the injection disc 16 is provided with a sand supply pipe 14 extending to the outside of the sandblasting casing 2 and used for connecting to an external sand box.

[0022] Furthermore, a screw rod 20 is provided in the middle portion between the upper positioning plate 11 and the lower positioning plate 12, and the lower end of the screw rod 20 extends to the inner side of the lower positioning plate 12 and is unidirectionally rotatably connected to the first rotating shaft 17 at the lower end through a one-way bearing. A second guide groove 10 is provided on the top of the screw rod 20, and the inner side of the second guide groove 10 is vertically movably connected to the second guide rod 24, and the upper end of the second guide rod 24 extends to the inner side of the upper positioning plate 11 and is unidirectionally rotatably connected to the first rotating shaft 17 at the upper end through a one-way bearing, the injection plate 16 is threadedly connected to the outer side of the screw rod 20, and a guide column 21 is fixedly provided on the top of the lower positioning plate 12, and the upper end of the guide column 21 is provided with a first guide groove 9, and the bottom of the upper positioning plate 11 is fixed with a first guide rod 23 corresponding to the guide column 21, and the lower end of the first guide rod 23 is movably connected to the inner side of the first guide groove 9, and the injection plate 16 is movably sleeved with the guide column 21.

[0023] The side surfaces of the sandblasting casing 2 are evenly provided with through grooves 8 corresponding to the edges of the lower positioning plate 12. The outer side of the lower end of the sandblasting casing 2 is detachably provided with a receiving groove 5 corresponding to the through groove 8. The outer side of the lower end of the sandblasting casing 2 is provided with a sand retaining shell 4 located on the top of the receiving groove 5 and corresponding to the through groove 8. The sand retaining shell 4 is annular and has an opening at the bottom.

[0024] The present invention also relates to an embodiment, specifically a method for omnidirectional sandblasting for machining a motor shaft, which is implemented using the above-mentioned omnidirectional sandblasting machine for machining a motor shaft, and specifically includes the following steps: Step 1: Insert the motor shaft from the bottom of the sandblasting casing 2 into the positioning cylinder 15 on the lower positioning plate 12, lock it with the locking assembly, and push the motor shaft upward so that the lower end of the motor shaft is located inside the positioning cylinder 15; Step 2: The sand supply pipe 14 is connected to the sand box to control the motor 13 at the bottom of the lower positioning plate 12. The motor 13 drives the gear 18 in the lower positioning plate 12 to rotate. The gear 18 drives the multiple positioning cylinders 15 to rotate through the ring gear 19, thereby realizing the rotation of multiple motor shafts. During this period, due to the rotation of the gear 18, the screw rod 20 will rotate, and the upper end of the second guide rod 24 will rotate relative to the first rotating shaft 17 on the upper positioning plate 11. Due to the rotation of the screw rod 20, the spray disc 16 is longitudinally displaced, and sandblasting is performed on the motor shaft through the spray port 22; Step 3: After the sandblasting is completed, the cylinder 6 drives the upper positioning plate 11 to move downward, and the first guide rod 23 and the second guide rod 24 are movable and contracted with the guide column 21 and the screw rod 20. The upper end of the motor shaft enters the positioning cylinder 15 on the upper positioning plate 11 and is locked by the locking assembly. Then the cylinder 6 drives the upper positioning plate 11 to rise, and the lower end of the motor shaft is disengaged from the inner side of the positioning cylinder 15 on the lower positioning plate 12. Then, the motor 13 on the upper positioning plate 11 drives the upper gear 18 to rotate, and the upper gear 18 drives the positioning cylinder 15 to rotate through the ring gear 19, thereby realizing the rotation of the motor shaft again. At this time, the first rotating shaft 17 at the upper end drives the screw rod 20 to rotate, and the lower end of the screw rod 20 rotates relative to the first rotating shaft 17 at the lower end. The motor shaft is also sandblasted by the injection port 22. Step 4: After the sandblasting is completed, the motor shaft can be pulled out from the upper end of the upper positioning plate 11; Step 5: The ejected sand particles are discharged through the through slot 8 , blocked by the sand retaining shell 4 , and then collected by the receiving slot 5 .

[0025] It should be noted that the present invention is an all-round sandblasting machine and method for processing a motor shaft. When in use, the motor shaft is inserted into the positioning cylinder 15 on the lower positioning disk 12 from the bottom of the sandblasting casing 2 and is locked by the locking assembly. Specifically, one end of the locking arm 28 is tilted upward and is an even number, two in a group, and the two locking arms 28 in a group form an eight-shaped shape. When the motor shaft is upward, the locking arm 28 can be pushed to swing, and the motor shaft can move upward. When the motor shaft tends to move downward, the two locking arms 28 arranged relatively will automatically lock, and the torsion spring 27 increases the pre-tightening force, so that the motor shaft can only move upward and cannot The motor shaft is moved downward to ensure the stability of the motor shaft, and then the motor shaft is pushed upward so that the lower end of the motor shaft is located inside the positioning cylinder 15. The sand supply tube 14 is connected to the sand box to control the motor 13 at the bottom of the lower positioning disk 12. The motor 13 drives the gear 18 in the lower positioning disk 12 to rotate. The gear 18 drives multiple positioning cylinders 15 to rotate through the ring gear 19, thereby realizing the rotation of multiple motor shafts. During this period, due to the synchronous rotation of the gear 18 and the first rotating shaft 17, the screw rod 20 will rotate. Because the second guide rod 24 and the first rotating shaft 17 at the upper end are connected in one direction by a one-way bearing, the second guide rod 24 is rotated in one direction at this time. The upper end rotates relative to the first rotating shaft 17 on the upper positioning plate 11. Due to the rotation of the screw rod 20, the jet disc 16 is displaced longitudinally, and the motor shaft is sandblasted through the jet port 22. After the sandblasting is completed, the cylinder 6 drives the upper positioning plate 11 to move downward, and the first guide rod 23 and the second guide rod 24 are retracted with the guide column 21 and the screw rod 20. The guide column 21 is used to guide the jet disc 16, which increases stability. The upper end of the motor shaft enters the positioning cylinder 15 on the upper positioning plate 11 and is locked by the locking assembly. Then the cylinder 6 drives the upper positioning plate 11 to rise, and the lower end of the motor shaft is moved from the lower positioning plate 12. The inner side of the positioning cylinder 15 is disengaged, and then the motor 13 on the upper positioning disk 11 drives the upper gear 18 to rotate, and the upper gear 18 drives the positioning cylinder 15 to rotate through the ring gear 19, thereby realizing the rotation of the motor shaft again. At this time, the first rotating shaft 17 at the upper end can drive the screw rod 20 to rotate, and the lower end of the screw rod 20 rotates relative to the first rotating shaft 17 at the lower end. The motor shaft is also sandblasted by the injection port 22. After the sandblasting is completed, the motor shaft can be pulled out from the upper end of the upper positioning disk 11. The sprayed sand particles will be discharged through the through groove 8, blocked by the sand retaining shell 4 and then collected by the receiving groove 5.

[0026] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An all-round sandblasting machine for motor shaft processing, comprising a sandblasting casing (2), characterized in that: The upper inner end of the sandblasting sleeve (2) is vertically and movably connected to an upper positioning plate (11), and the lower inner end of the sandblasting sleeve (2) is fixedly provided with a lower positioning plate (12). The outer peripheries of the upper positioning plate (11) and the lower positioning plate (12) are both penetrated by positioning cylinders (15), and the inner side of the positioning cylinder (15) is provided with a locking assembly for fixing the motor shaft. The upper positioning plate (11) and the lower positioning plate (12) are both hollow structures, and the upper positioning plate (11) and the lower positioning plate (12) are fixedly provided with a lower positioning plate (12). A first rotating shaft (17) is rotatably provided on the inner side of each disk (12), a gear (18) is provided on the first rotating shaft (17), a gear ring (19) meshing with the gear (18) is fixed on the outer side of the positioning cylinder (15), a motor (13) for driving the first rotating shaft (17) to rotate is provided on the opposite sides of the upper positioning disk (11) and the lower positioning disk (12), and a cylinder (6) for driving the upper positioning disk (11) to rise and fall is provided on the upper end of the sandblasting sleeve (2); The locking assembly comprises a groove (25) provided on the inner wall of the positioning cylinder (15), a locking arm (28) being rotatably provided inside the groove (25), one end of the locking arm (28) extending into the inner cavity of the positioning cylinder (15), and the bracket (1) extending into the inner cavity of the positioning cylinder (15) is tilted upward, and the locking arms (28) are an even number and correspond to each other in pairs; An injection disc (16) is provided between the upper positioning disc (11) and the lower positioning disc (12), a side of the injection disc (16) is provided with an injection port (22) corresponding to the positioning cylinder (15), and a sand supply pipe (14) extending to the outside of the sandblasting sleeve (2) and used for connecting to an external sand box is provided on one side of the injection disc (16).

2. The omnidirectional sandblasting machine for motor shaft processing according to claim 1, characterized in that: A bracket (1) is provided on the outside of the sandblasting casing (2); the bracket (1) is in a transversely arranged "concave" structure, and the gap between the bottom of the sandblasting casing (2) and the lower end of the bracket (1) is greater than the length of the motor shaft.

3. The omnidirectional sandblasting machine for motor shaft processing according to claim 1, characterized in that: A traction frame (7) is provided on the top of the upper positioning plate (11), a motor (13) at the upper end of the upper positioning plate (11) is located below the traction frame (7), a mounting frame (3) is provided at the upper end of the sandblasting casing (2), the cylinder (6) is mounted on the upper end of the mounting frame (3), and an output shaft of the cylinder (6) is bolted to the traction frame (7).

4. The omnidirectional sandblasting machine for motor shaft processing according to claim 1, characterized in that: A second rotating shaft (26) is rotatably provided inside the groove (25), one end of the locking arm (28) is fixed on the second rotating shaft (26), and a torsion spring (27) is installed between the end of the second rotating shaft (26) and the inner wall of the groove (25).

5. The omnidirectional sandblasting machine for motor shaft processing according to claim 4, characterized in that: A pin (29) is rotatably provided at one end of the locking arm (28) away from the second rotating shaft (26), and a roller (30) is provided on the pin (29).

6. The omnidirectional sandblasting machine for motor shaft processing according to claim 1, characterized in that: A screw rod (20) is provided in the middle between the upper positioning plate (11) and the lower positioning plate (12), the lower end of the screw rod (20) extends to the inner side of the lower positioning plate (12) and is unidirectionally rotatably connected to the first rotating shaft (17) at the lower end through a one-way bearing, a second guide groove (10) is provided on the top of the screw rod (20), the inner side of the second guide groove (10) is vertically movably connected to a second guide rod (24), and the upper end of the second guide rod (24) extends to the inner side of the upper positioning plate (11) and is unidirectionally rotatably connected to the first rotating shaft (17) at the upper end through a one-way bearing, and the injection plate (16) is threadedly connected to the outer side of the screw rod (20).

7. The omnidirectional sandblasting machine for motor shaft processing according to claim 6, characterized in that: A guide column (21) is fixedly provided on the top of the lower positioning plate (12), a first guide groove (9) is provided on the upper end of the guide column (21), a first guide rod (23) corresponding to the guide column (21) is fixed on the bottom of the upper positioning plate (11), and the lower end of the first guide rod (23) is movably connected to the inner side of the first guide groove (9), and the injection plate (16) is movably sleeved with the guide column (21).

8. The omnidirectional sandblasting machine for motor shaft processing according to claim 1, characterized in that: The side surface of the sandblasting sleeve (2) is evenly provided with through grooves (8) corresponding to the edge of the lower positioning plate (12), and the outer side of the lower end of the sandblasting sleeve (2) is detachably provided with a receiving groove (5) corresponding to the through groove (8).

9. The omnidirectional sandblasting machine for motor shaft processing according to claim 8, characterized in that: A sand retaining shell (4) is provided on the outer side of the lower end of the sandblasting casing (2), which is located at the top of the receiving groove (5) and corresponds to the through groove (8). The sand retaining shell (4) is annular and has an open bottom.

10. A method for omnidirectional sandblasting for machining a motor shaft, implemented by using the omnidirectional sandblasting machine for machining a motor shaft according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The motor shaft is inserted into the positioning cylinder (15) on the lower positioning plate (12) from the bottom of the sandblasting casing (2), locked by the locking assembly, and the motor shaft is pushed upward so that the lower end of the motor shaft is located inside the positioning cylinder (15); S2: The sand supply pipe (14) is connected to the sand box to control the motor (13) at the bottom of the lower positioning plate (12). The motor (13) drives the gear (18) in the lower positioning plate (12) to rotate. The gear (18) drives the plurality of positioning cylinders (15) to rotate through the gear ring (19), thereby realizing the rotation of the plurality of motor shafts. During this period, due to the rotation of the gear (18), the screw rod (20) rotates, and the upper end of the second guide rod (24) and the first rotating shaft (17) on the upper positioning plate (11) rotate relative to each other. Due to the rotation of the screw rod (20), the injection plate (16) is longitudinally displaced, and the motor shaft is sandblasted through the injection port (22); S3: After the sandblasting is completed, the cylinder (6) drives the upper positioning plate (11) to move downward, the first guide rod (23) and the second guide rod (24) and the guide column (21) and the screw rod (20) to move and contract, the upper end of the motor shaft enters the positioning cylinder (15) on the upper positioning plate (11) and is locked by the locking assembly, and then the cylinder (6) drives the upper positioning plate (11) to rise, the lower end of the motor shaft is disengaged from the inner side of the positioning cylinder (15) on the lower positioning plate (12), and then the motor (13) on the upper positioning plate (11) drives the gear (18) at the upper end to rotate, and the gear (18) at the upper end drives the positioning cylinder (15) to rotate through the gear ring (19), thereby realizing the rotation of the motor shaft again, at this time the first rotating shaft (17) at the upper end drives the screw rod (20) to rotate, and the lower end of the screw rod (20) rotates relative to the first rotating shaft (17) at the lower end, and the motor shaft is also sandblasted by the injection port (22); S4: After the sandblasting is completed, the motor shaft is pulled out from the upper end of the upper positioning plate (11); S5: The ejected sand particles are discharged through the through slot (8), blocked by the sand retaining shell (4), and then collected by the receiving slot (5).

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