Turning device for motor shaft

Abstract

The invention relates to the technical field of motor production and machining, and provides a motor shaft turning device which comprises a workbench and a tool rest installed at the top end of the workbench. A base is installed at the top end of the workbench, a centering structure is arranged on one side of the top of the base, and a clamping mechanism is installed on one side of the centering structure; a rack is fixed to one side of the top end of the workbench, a conveying mechanism is installed at the top of the rack, and a collecting cavity is installed at the bottom of the workbench. The material conveying mechanism is arranged, the conveying wheels are arranged on the top of the rack, the motor shaft can be automatically turned over by 90 degrees after material changing is finished, automatic conveying of a single motor shaft is achieved, manual intervention is avoided, the material changing time is shortened, and the material conveying mechanism, the centering structure and the clamping mechanism are cooperatively matched, so that the material changing efficiency is improved. The complete process integration of automatic feeding, precise centering, stable clamping, turning machining and automatic discharging of the motor shaft is achieved, and the machining precision, the production efficiency and the stability of motor shaft turning are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor production and processing, in particular to a turning device for motor shafts. BACKGROUND

[0002] The motor shaft is a key transmission component of the motor system. In the production and processing process, a special turning device is needed. The machine tool equipment for precise machining of the motor shaft realizes high-precision and high-efficiency turning machining of the motor shaft parts through the coordinated movement of workpiece rotation and tool movement, combined with high-rigidity structure, precise feeding system and intelligent control technology. It belongs to a kind of intelligent manufacturing equipment industry. Therefore, the patent with the publication number CN118321582B discloses a turning device for motor shaft machining, which relates to the field of motor production and processing, and comprises a base, a side wall supporting mechanism, a turning mechanism and a turning moving mechanism arranged on the base. The turning moving mechanism is arranged on the upper surface of the base, and the turning mechanism is arranged on the turning moving mechanism. The turning moving mechanism is used to drive the turning mechanism to move linearly for cutting. The turning device for motor shaft machining of the present application adds a side wall supporting mechanism on the opposite side of the tool head to support the other side of the motor shaft, offset the lateral stress of the tool head, prevent extrusion and bending of the motor shaft during turning, and make the turning feed amount of the motor shaft during turning always balanced. The side wall supporting mechanism supports and fixes the motor shaft during turning, reduces the turning vibration between the tool head and the motor shaft, and makes the motor shaft turning more smooth. The turning device in the above-mentioned patent supports and fixes the motor shaft during turning through the side wall supporting mechanism, reduces the vibration and makes the motor shaft turning more smooth. However, manual feeding and discharging are needed when the motor shaft is processed. Manual operation needs to complete the steps of taking, placing and adjusting. Each link needs time, and is easily affected by the proficiency of the operator, which leads to the extension of the single-piece processing period. After the motor shaft is placed, it is directly fixed by the clamp. If there is a shape error or clamping position deviation of the shaft body, the clamp may not be able to apply uniform force, which may cause the shaft body to shift slightly or vibrate during processing, affecting the size accuracy and shape tolerance. SUMMARY

[0003] The purpose of the present application is to provide a turning device for motor shafts to solve the problem of insufficient machining precision of the existing turning device for motor shafts.

[0004] In order to solve the above technical problems, the application provides the following technical scheme: a turning device for motor shafts, comprising a workbench and a tool holder installed at the top end of the workbench; a base is installed at the top end of the workbench, and a centering structure is arranged on one side of the top of the base; a clamping mechanism is installed on one side of the centering structure; a rack is fixed on one side of the top end of the workbench, and a feeding mechanism is installed on the top of the rack; a collecting cavity is installed at the bottom of the workbench; the centering structure comprises a shell fixed to the top of the base, and a top plate is arranged in the shell; centering rods are installed on both sides of the top plate; a connecting shaft is installed at the bottom end of the base at the bottom of the top plate, a transmission gear is arranged on the outer side of the connecting shaft, and a brake ratchet is fixed to one end of the connecting shaft.

[0005] Preferably, a guide rail plate is installed at the top end of the workbench at the bottom of the shell, an inclined guide rail is arranged on the top of the guide rail plate, a second straight guide rail is arranged at the bottom of the inclined guide rail, and a baffle is hinged at the intersection of the second straight guide rail and the inclined guide rail.

[0006] Preferably, first chambers are fixed to the top of the centering rods, side centering wheels are arranged on the opposite sides of the first chambers, air tubes are connected to one side of the first chambers, and rollers are installed at the bottom of the centering rods.

[0007] Preferably, a movable gear is fixed to one end of the transmission gear, a second chamber is installed at the other end of the transmission gear, pistons are arranged in the second chamber and the first chamber, the transmission gear and the side centering wheels are connected to the pistons through plug rods, one end of the second chamber is connected to the air tube, and a sliding block groove is arranged in the transmission gear.

[0008] Preferably, movable grooves are arranged at both ends of the connecting shaft, the movable grooves and the sliding block groove and the movable gear form a sliding structure, a linkage gear is installed at one end of the connecting shaft, a first spring is arranged on the outer side of the connecting shaft at one end of the movable gear, a second rack is arranged at one end of the guide rail plate at the bottom of the linkage gear, a first rack is arranged at the top end of the workbench at the bottom of the transmission gear, and the first rack is located below the feeding mechanism.

[0009] Preferably, first straight guide rails are symmetrically arranged at one end of the first rack, an arc-shaped guide rail is arranged in the middle of the first straight guide rails, first guide shafts are fixed to the bottom of the base at the corresponding positions of the arc-shaped guide rail, second guide shafts are fixed to the bottom of the base on one side of the first guide shafts, elastic sheets are installed on one side of the brake ratchet, pawls are hinged to the bottom of the elastic sheets, third guide shafts are fixed to one end of the pawls, and the third guide shafts and the second straight guide rail and the inclined guide rail form a sliding structure.

[0010] Preferably, the top of the top plate is provided with a lower centering wheel, both sides of the top plate are provided with inclined blocks, the bottom of the top plate is provided with a fixed tooth, and the top of the fixed tooth is provided with a movable tooth, both sides of the movable tooth are provided with guide columns, and the movable tooth and the guide columns form a sliding structure, the outer part of the guide column is provided with a second spring, and the fixed tooth and the movable tooth are engaged.

[0011] Preferably, the feeding mechanism comprises a conveying frame fixed to one end of the rack, and a conveying wheel is mounted on the top of the rack at one end of the conveying frame, both ends of the bottom of the conveying frame are provided with support plates, and a gear set is mounted on one side of the conveying frame.

[0012] Preferably, the inside of the conveying wheel is penetrated by a movable shaft, one end of the movable shaft is provided with a first gear, the outer part of the conveying wheel is provided with grooves at equal intervals, one side of the support plate is fixed with a third rack, the middle of the third rack is provided with a second gear, one side of the third rack is connected with a fourth rack, and the fourth rack and the gear set are engaged.

[0013] Preferably, the clamping mechanism comprises a support fixed to the top end of the base, and the top of the support is provided with a shell, the shell and the support are rotatably connected, and the inside of the shell is symmetrically provided with clamping blocks at equal intervals.

[0014] Compared with the prior art, the turning processing device for the motor shaft realizes the complete process integration of automatic feeding, accurate centering, stable clamping, turning processing and automatic discharging of the motor shaft, significantly improves the machining precision, production efficiency and stability of the motor shaft turning; 1. By setting the feeding mechanism, the top of the rack is provided with a conveying wheel, which can automatically turn 90° after the feeding is finished, realizing the automatic conveying of a single motor shaft, avoiding manual intervention, shortening the feeding time, realizing the automatic conveying of a single motor shaft, avoiding manual intervention, and shortening the feeding time; Further, the functions of feeding, centering, clamping, turning, discharging and the like are integrated, the structure is compact, the equipment occupies less area, after processing is completed, the new material automatically pushes the finished product into the collecting cavity, realizing seamless assembly line operation, and being suitable for batch production; Further, different specifications of motor shafts can be processed, the cutting length can be controlled by adjusting the timing of the air cylinder and the sliding table, the collecting cavity is designed in a pull-out type, facilitating the handling and cleaning of the finished product, and being convenient to maintain; 2. By setting the centering structure, the outer side of the side centering wheel is provided with a first cavity connected with a second cavity on one side of the transmission gear, through the cooperation of the pneumatic, gear transmission and guide rail, automatic centering and clamping are realized, and the shaft body deviation or vibration caused by clamping deviation is avoided; Further, the bilateral centering wheel and the top plate cooperate to adapt to different diameters of the motor shaft, ensure the shaft center line and the tool center line are consistent, and improve the size precision and shape tolerance of turning; Further, the transmission gear is designed to be linked with the air path, so that the clamping force can be automatically adjusted and the position can be locked according to the shaft diameter during clamping, so as to avoid over-tightening or over-looseness; Further, the brake ratchet and spring structure provide reverse locking function to prevent rotation, enhance system rigidity, and reduce cutting vibration. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a left view three-dimensional structure schematic diagram of the present application; Figure 2 It is a right view three-dimensional structure schematic diagram of the present application; Figure 3 It is a bottom view three-dimensional structure schematic diagram of the present application; Figure 4 It is a bottom view three-dimensional structure schematic diagram of the present application; Figure 5 It is a bottom view three-dimensional structure schematic diagram of the present application; Figure 6 It is a bottom view three-dimensional structure schematic diagram of the present application; Figure 7 It is a bottom view three-dimensional structure schematic diagram of the present application; Figure 8 It is a bottom view three-dimensional structure schematic diagram of the present application; Figure 9 It is a bottom view three-dimensional structure schematic diagram of the present application; Figure 10 It is Figure 8 It is a three-dimensional structure schematic diagram of the local enlargement at A in the middle; Figure 11 It is a three-dimensional structure schematic diagram of the first chamber in a half-section state of the present application; Figure 12 It is a three-dimensional structure schematic diagram of the connecting shaft of the present application; Figure 13 It is a three-dimensional structure schematic diagram of the transmission gear in a split state and rear view of the present application; Figure 14 It is a three-dimensional structure schematic diagram of the transmission gear in a split state and front view of the present application; Figure 15 It is a three-dimensional structure schematic diagram of the transmission gear in a half-section state of the present application; Figure 16 It is a three-dimensional structure schematic diagram of the conveying frame in a left view of the present application; Figure 17 It is a three-dimensional structure schematic diagram of the conveying frame in a right view of the present application; Figure 18This is a three-dimensional structural diagram of the conveyor frame of the present invention, viewed from below. Figure 19 This is a schematic diagram of the three-dimensional structure of the outer shell of the present invention in a semi-sectional state; Figure 20 This is a three-dimensional structural diagram of the first rack of the present invention.

[0016] The following are the annotations in the diagram: 1. Workbench; 2. Tool holder; 3. Centering structure; 31. Housing; 32. First rack; 321. First guide shaft; 322. Second guide shaft; 323. First straight guide rail; 324. Arc-shaped guide rail; 33. Centering rod; 331. Side centering wheel; 332. First chamber; 333. Air pipe; 34. Guide rail plate; 341. Second straight guide rail; 342. Inclined guide rail; 343. Baffle plate; 35. Transmission gear; 351. Second chamber; 352. Movable gear; 353. Slider groove; 36. Connecting shaft; 361. First spring; 362. Linkage gear; 363. Movable groove; 37. Braking ratchet. 371. Teeth; 372. Elastic sheet; 373. Third guide shaft; 374. Pawl; 38. Top plate; 381. Lower centering wheel; 382. Inclined block; 383. Fixed tooth; 384. Movable tooth; 385. Guide column; 386. Second spring; 39. Second rack; 4. Base; 5. Conveying mechanism; 51. Conveying frame; 52. Conveying wheel; 521. First gear; 522. Movable shaft; 523. Groove; 53. Support plate; 531. Third rack; 532. Second gear; 533. Fourth rack; 54. Gear set; 6. Frame; 7. Clamping mechanism; 71. Bracket; 72. Outer shell; 73. Clamping block; 8. Collection chamber. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-20The present invention provides a turning apparatus for a motor shaft, comprising a worktable 1 and a tool holder 2 mounted on its top; a base 4 is mounted on the top of the worktable 1, and a centering structure 3 is provided on one side of the top of the base 4, and a clamping mechanism 7 is mounted on one side of the centering structure 3; a frame 6 is fixed to one side of the top of the worktable 1, and a material conveying mechanism 5 is mounted on the top of the frame 6; the material conveying mechanism 5 includes a conveyor frame 51 fixed to one end of the frame 6, and a conveyor wheel 52 is mounted on the top of the frame 6 at one end of the conveyor frame 51, and a bottom of the conveyor frame 51... Both ends are provided with support plates 53. A gear set 54 is installed on one side of the conveyor frame 51. A movable shaft 522 runs through the inside of the conveyor wheel 52, and a first gear 521 is installed at one end of the movable shaft 522. Grooves 523 are provided at equal intervals on the outside of the conveyor wheel 52. A third rack 531 is fixed on one side of each support plate 53, and a second gear 532 is provided in the middle of the third rack 531. A fourth rack 533 is connected to one side of the third rack 531, and the fourth rack 533 meshes with the gear set 54. Reference Figure 1 , Figure 16 , Figure 17 and Figure 18 As shown, during the turning of the motor shaft, an electric slide rail is installed at the bottom of the base 4. Activating the electric slide rail moves the base 4 closer to the motor shaft on the top of the support plate 53. At this time, both the centering structure 3 and the clamping mechanism 7 are in the unfolded state. When both the centering structure 3 and the clamping mechanism 7 have moved past one end of the motor shaft, a cylinder is installed on the top of the fourth rack 533, and the fourth rack 533 is connected to the third rack 531. Activating the cylinder then moves the fourth rack 533 and the third rack 531 simultaneously. Through the meshing relationship between the second gear 532 and the third rack 531, both sets of support plates 53 simultaneously move to the sides, opening to a state where the clamping mechanism 7 can pass. A ratchet assembly is provided on one side of the first gear 521. With its cooperation, the fourth rack 53... During the displacement process, the gear set 54 drives the conveyor wheel 52 to idle, and the movable shaft 522 is stationary. When the motor shaft of the clamping mechanism 7 moves away from the area of ​​the support plate 53, the starting cylinder drives the third rack 531 and the fourth rack 533 to reset simultaneously. Through the cooperation of the second gear 532, the support plate 53 is merged. At the same time, the fourth rack 533 drives the gear set 54 to rotate. Under the gear ratio difference between the large and small gears in the gear set 54, the first gear 521 rotates 90°, which drives the conveyor wheel 52 to flip over, flipping the motor shaft inside the groove 523 into the conveyor frame 51. The conveyor frame 51 is in an inclined state. When the motor shaft flips into its interior, the motor shaft rolls downward to the baffle position inside the conveyor frame 51, so that the motor shaft is placed in the designated position. The centering structure 3 includes a housing 31 fixed to the top of the base 4, with a top plate 38 inside the housing 31. Centering rods 33 are mounted on both sides of the top plate 38. A connecting shaft 36 is mounted at the bottom of the base 4 at the bottom of the top plate 38, and a transmission gear 35 is mounted on the outside of the connecting shaft 36. A brake ratchet 37 is fixed to one end of the connecting shaft 36. A first chamber 332 is fixed to the top of each centering rod 33, and a side centering wheel 331 is mounted on the opposite side of each first chamber 332. An air pipe 333 is connected to one side of each first chamber 332. Rollers are mounted at the bottom of each centering rod 33. A second chamber 351 is mounted to the other end of the transmission gear 35, and pistons are installed inside both the second chamber 351 and the first chamber 332. One side of the transmission gear 35 and the side centering wheel 331 are connected to the pistons via a stopper rod. One end of the second chamber 351 is connected to the air pipe 333. The gear 35 has a slider groove 353 inside, and both ends of the connecting shaft 36 have movable grooves 363. The movable grooves 363 form a sliding structure with the slider groove 353 and the movable gear 352 respectively. The top of the worktable 1 at the bottom of the transmission gear 35 is provided with a first rack 32, and the first rack 32 is located below the material conveying mechanism 5. A first straight guide rail 323 is symmetrically provided at one end of the first rack 32, and an arc-shaped guide rail 324 is provided in the middle of the first straight guide rail 323. A first guide shaft 321 is fixed at the bottom of the base 4 at the corresponding position of the arc-shaped guide rail 324, and a second guide shaft 322 is fixed at the bottom of the base 4 on one side of the first guide shaft 321. A lower centering wheel 381 is installed on the top of the top plate 38, and inclined blocks 382 are provided on both sides of the top plate 38. A fixed tooth 383 is provided at the bottom of the top plate 38, and the fixed tooth 383 meshes with the movable gear 352. Reference Figure 5 , Figure 6 , Figure 8 , Figure 11 , Figure 14 , Figure 15 and Figure 20As shown, during the displacement of the base 4, the second guide shaft 322 below the base 4 first passes through the outer first straight guide rail 323, the transmission gear 35 and the first rack 32 pass through each other, and finally the first guide shaft 321 below the base 4 enters the interior of the arc-shaped guide rail 324. The arc design of the arc-shaped guide rail 324 pulls the first rack 32 inward to move to the position corresponding to the transmission gear 35. When the clamping mechanism 7 is displaced to the end of the motor shaft, the electric slide rail is activated to drive the base 4 to move in the opposite direction. The first guide shaft 321 passes through the inner first straight guide rail 323, the transmission gear 35 contacts and meshes with the first rack 32, causing the transmission gear 35 to rotate, causing the connected movable gear 352 to rotate synchronously, driving the meshing fixed tooth 383 to move upward, lifting the top motor shaft. At the same time, the inclined block 382 moves upward, causing the centering rod to move upward. The bottom of the plate 33 flips to both sides, while the side centering wheel 331 at the top clamps inward. Through the design of the inclined block 382 and the centering rod 33, the side centering wheel 331 and the lower centering wheel 381 are squeezed towards the center simultaneously when the top plate 38 moves upward. A piston is provided on one side of each side centering wheel 331. When it is squeezed in contact with the motor shaft, the piston compresses the gas inside the first chamber 332 and passes it through the air pipe 333 to the inside of the second chamber 351. When the gas in both first chambers 332 is compressed into the second chamber 351, the gas pushes the piston inside to one end, causing the transmission gear 35 connected to it to slide to one side along the movable groove 363, disengage from the first rack 32 and stop rotating. The brake ratchet 37 on one side of the connecting shaft 36 can prevent the connecting shaft 36 from reversing, making the structure more stable and suitable for motor shafts of different diameters. A linkage gear 362 is installed at one end of the connecting shaft 36. The clamping mechanism 7 includes a bracket 71 fixed to the top of the base 4, and a housing 72 is provided on the top of the bracket 71. The housing 72 and the bracket 71 are rotatably connected. Clamping blocks 73 are symmetrically and equally spaced inside the housing 72. Reference Figure 2 , Figure 5 , Figure 14 , Figure 19 and Figure 20As shown, after the motor shaft is centered and clamped, there are two sets of clamping blocks 73, which are connected by a pinion, rack and gear ring. A servo motor is installed on the outer end of the pinion. The servo motor is started to drive the gear and other components, so that the clamping blocks 73 are pressed towards the center at the same time. The two sets of clamping blocks 73 improve the clamping firmness and accuracy, ensuring that the central axis of the motor shaft is consistent. The base 4 drives the motor shaft to continuously move towards the tool holder 2. The second guide shaft 322 enters the outer arc guide rail 324, and then slides into the outer first straight guide rail 323 during continuous displacement, pushing the first rack 32 to slide back to its original position. During continuous movement, the linkage gear 362 contacts and meshes with the second rack 39. However, a ratchet assembly is provided on one side of the linkage gear 362. With the cooperation of the ratchet assembly, the linkage gear 362 rotates freely, and the connecting shaft 36 remains stationary. When the motor shaft moves to the position of the tool holder 2, the motor at the rear end of the tool holder 2 is started to drive it to rotate, and different tools are automatically switched for cutting. A guide rail plate 34 is mounted on the top of the workbench 1 at the bottom of the housing 31. An inclined guide rail 342 is provided on the top of the guide rail plate 34, and a second straight guide rail 341 is provided at the bottom of the inclined guide rail 342. A baffle plate 343 is hinged at the intersection of the second straight guide rail 341 and the inclined guide rail 342. A movable gear 352 is fixed to one end of the transmission gear 35. A first spring 361 is sleeved on the connecting shaft 36 at one end of the movable gear 352. A second rack 39 is provided at one end of the guide rail plate 34 at the bottom of the linkage gear 362, and a braking ratchet 37... A spring sheet 371 is installed on one side, and a pawl 373 is hinged to the bottom of the spring sheet 371. A third guide shaft 372 is fixed to one end of the pawl 373. The third guide shaft 372 and the second straight guide rail 341 and the inclined guide rail 342 form a sliding structure. A movable tooth 384 is installed on the top of the fixed tooth 383. Guide posts 385 are provided on both sides of the movable tooth 384. The movable tooth 384 and the guide posts 385 form a sliding structure. A second spring 386 is sleeved on the outside of the guide posts 385. Reference Figures 4-14As shown, after the motor shaft completes the turning work, the electric slide rail drives the base 4 to move again towards the position of the feeding mechanism 5 for loading and unloading. During the initial displacement, the third guide shaft 372 slides along the second straight guide rail 341 past the baffle 343. Because the baffle 343 abuts against the bottom, the second straight guide rail 341 enters the inclined guide rail 342. Since the inclined guide rail 342 is arc-shaped, the pawl 373 flips and the brake ratchet 37 disengages. The third guide shaft 372 continues to slide along the inclined guide rail 342, while the linkage gear 362 contacts the second rack 39 and rotates, causing the connecting shaft 36 and the connected movable gear 352 to move in the opposite direction. This causes the fixed tooth 383 and the top plate 38 to move downward, and the bottom of the centering rod 33 loses the inclined block 38. The compression of 2, and the bottom outer side of the centering rod 33 is provided with springs. The springs push the bottom of the centering rod 33 to flip inward, so that the pressure at the side centering wheel 331 disappears. Under the action of the tension of the first spring 361, the transmission gear 35 is pushed to slide and reset, so that the gas in the second chamber 351 is compressed back into the first chamber 332. When the top plate 38 drops to the lowest point, the stroke of the second rack 39 has not yet been completed. The movable gear 352 continues to rotate and squeeze the movable tooth 384, so that the movable tooth 384 slides on the guide post 385. The movable gear 352 has a tooth slip phenomenon until it moves away from the second rack 39. At the same time, the third guide shaft 372 slides out of the inclined guide rail 342, and the elastic plate 371 rebounds and pushes the pawl 373 to engage with the brake ratchet 37 again. A collection chamber 8 is installed at the bottom of the workbench 1. A cover plate is provided at the bottom of the collection chamber 8. The cover plate and the collection chamber 8 are connected by a pull-out structure. Reference Figure 2 , Figure 3 and Figure 17 As shown, after the centering structure 3 unfolds, the clamping mechanism 7 opens simultaneously, allowing the motor shaft to be placed inside the centering structure 3 and the clamping mechanism 7. Then, the base 4 continues to move. When the processed motor shaft is squeezed against the motor shaft in the preparation area, the motor shaft in the preparation area pushes the processed motor shaft out of the centering structure 3 and the clamping mechanism 7 and rolls into the collection chamber 8. The lower cover plate and the collection chamber 8 have a pull-out structure, which facilitates the handling of the motor shaft. After the motor shaft in the preparation area enters the centering structure 3 and the clamping mechanism 7, the support plate 53 unfolds again. The centering structure 3 and the clamping mechanism 7 continue to move, performing reciprocating loading and unloading and turning in one process, thereby improving production efficiency.

[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A turning apparatus for an electric motor shaft, comprising a worktable (1) and a tool holder (2) mounted on its top. Its features are: The top of the workbench (1) is equipped with a base (4), and a centering structure (3) is provided on one side of the top of the base (4), and a clamping mechanism (7) is installed on one side of the centering structure (3). A frame (6) is fixed on one side of the top of the workbench (1), and a material conveying mechanism (5) is installed on the top of the frame (6). A collection chamber (8) is installed at the bottom of the workbench (1). The centering structure (3) includes a housing (31) fixed to the top of the base (4), and a top plate (38) is provided inside the housing (31). Centering rods (33) are installed on both sides of the top plate (38). A connecting shaft (36) is installed at the bottom end of the base (4) at the bottom of the top plate (38), and a transmission gear (35) is provided on the outside of the connecting shaft (36). A brake ratchet (37) is fixed at one end of the connecting shaft (36).

2. The turning apparatus for a motor shaft according to claim 1, characterized in that: The top of the workbench (1) at the bottom of the housing (31) is equipped with a guide rail plate (34), and the top of the guide rail plate (34) is provided with an inclined guide rail (342). The bottom of the inclined guide rail (342) is provided with a second straight guide rail (341), and a baffle plate (343) is hinged at the intersection of the second straight guide rail (341) and the inclined guide rail (342).

3. The turning apparatus for a motor shaft according to claim 1, characterized in that: The top of each centering rod (33) is fixed with a first chamber (332), and a side centering wheel (331) is provided on the opposite side of each first chamber (332). An air pipe (333) is connected to one side of each first chamber (332), and a roller is installed at the bottom of each centering rod (33).

4. The turning apparatus for a motor shaft according to claim 3, characterized in that: One end of the transmission gear (35) is fixed with a movable gear (352), and the other end of the transmission gear (35) is equipped with a second chamber (351). Both the second chamber (351) and the first chamber (332) are equipped with pistons. One side of the transmission gear (35) and the side centering wheel (331) are connected to the pistons through a piston rod. One end of the second chamber (351) is connected to the air pipe (333). The transmission gear (35) is equipped with a slider groove (353).

5. The turning apparatus for a motor shaft according to claim 4, characterized in that: Both ends of the connecting shaft (36) are provided with movable grooves (363), and the movable grooves (363) form a sliding structure with the slider groove (353) and the movable gear (352) respectively. One end of the connecting shaft (36) is equipped with a linkage gear (362), and one end of the movable gear (352) is fitted with a first spring (361) on the connecting shaft (36). One end of the guide plate (34) at the bottom of the linkage gear (362) is provided with a second rack (39), and the top of the worktable (1) at the bottom of the transmission gear (35) is provided with a first rack (32), and the first rack (32) is located below the material conveying mechanism (5).

6. The turning apparatus for a motor shaft according to claim 5, characterized in that: The first rack (32) is symmetrically provided with a first straight guide rail (323) at one end, and an arc-shaped guide rail (324) is provided in the middle of the first straight guide rail (323). The bottom of the base (4) at the corresponding position of the arc-shaped guide rail (324) is fixed with a first guide shaft (321), and the bottom of the base (4) on one side of the first guide shaft (321) is fixed with a second guide shaft (322). A spring plate (371) is installed on one side of the brake ratchet (37), and a pawl (373) is hinged to the bottom of the spring plate (371). A third guide shaft (372) is fixed at one end of the pawl (373), and a sliding structure is formed between the third guide shaft (372) and the second straight guide rail (341) and the inclined guide rail (342).

7. The turning apparatus for a motor shaft according to claim 4, characterized in that: The top plate (38) is equipped with a lower centering wheel (381), and both sides of the top plate (38) are provided with inclined blocks (382). The bottom of the top plate (38) is provided with a fixed tooth (383), and the top of the fixed tooth (383) is equipped with a movable tooth (384). Both sides of the movable tooth (384) are provided with guide posts (385), and the movable tooth (384) and the guide posts (385) form a sliding structure. The guide posts (385) are all fitted with a second spring (386). The fixed tooth (383) and the movable gear (352) mesh with each other.

8. The turning apparatus for a motor shaft according to claim 1, characterized in that: The material conveying mechanism (5) includes a conveying frame (51) fixed to one end of the frame (6), and a conveying wheel (52) is installed on the top of the frame (6) at one end of the conveying frame (51). Support plates (53) are provided at both ends of the bottom of the conveying frame (51), and a gear set (54) is installed on one side of the conveying frame (51).

9. The turning apparatus for a motor shaft according to claim 8, characterized in that: The conveying wheel (52) has a movable shaft (522) running through its interior, and a first gear (521) is installed at one end of the movable shaft (522). The conveying wheel (52) has grooves (523) evenly spaced on its exterior. A third rack (531) is fixed on one side of the support plate (53), and a second gear (532) is provided in the middle of the third rack (531). A fourth rack (533) is connected to one side of the third rack (531), and the fourth rack (533) meshes with the gear set (54).

10. The turning apparatus for a motor shaft according to claim 1, characterized in that: The clamping mechanism (7) includes a bracket (71) fixed to the top of the base (4), and a housing (72) is provided on the top of the bracket (71). The housing (72) and the bracket (71) are rotatably connected. Clamping blocks (73) are symmetrically and equally spaced inside the housing (72).

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