Surface treatment equipment for transmission shaft machining

Abstract

The invention relates to the field of workpiece machining, and discloses surface treatment equipment for transmission shaft machining, which comprises a machine body, a treatment assembly and a clamping assembly, the treatment assembly and the clamping assembly are arranged at the front end of the machine body and are used for polishing and fixing transmission shafts, and the clamping assembly comprises a movable seat arranged at the front end of the machine body; the front end of the movable seat is rotationally connected with a chuck through a fixed seat, the outer side of the movable seat is fixedly connected with a third motor used for driving the chuck to rotate, and the surface of the fixed seat is provided with an anti-deviation assembly used for fixing the end of the transmission shaft to prevent the transmission shaft from deviating in the machining process. Through fixing of the clamping arms, deviation between the transmission shaft and the chuck caused by uneven stress in the machining process can be prevented, so that the stability of the transmission shaft in the machining process is guaranteed, it is guaranteed that the surface treatment precision of the transmission shaft is not affected, polishing operation cannot be hindered while stable clamping of the transmission shaft is achieved, and the polishing efficiency is improved. And the polishing efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of workpiece machining, in particular to a surface treatment equipment for transmission shaft machining. BACKGROUND

[0002] The transmission shaft is an important component for transmitting power in a transmission system, for example, in an automobile, the transmission shaft, the transmission and the differential work together to transmit the torque output by the engine to the wheels to drive the vehicle to travel.

[0003] During the machining process, the surface of the transmission shaft needs to be polished, and during the polishing process, the transmission shaft is usually fixed from both ends, and then the surface of the transmission shaft is polished by a polishing wheel.

[0004] However, in actual operation, the two ends of the transmission shaft are usually fixed by a rotatable connecting seat extrusion clamping, and during the polishing process, the polishing position of the transmission shaft is always changing, when polishing the region of one end of the transmission shaft, the end being polished will be subjected to the action force of the polishing wheel, and the other end will not be subjected to the action force, so that the two ends of the transmission shaft are unevenly stressed during the polishing operation, and the end of the transmission shaft subjected to a large stress will be offset from the connecting seat clamping it, even a very slight offset will cause a large error in the surface precision of the polished transmission shaft, thereby affecting the polishing quality of the surface of the transmission shaft. SUMMARY

[0005] The application provides a surface treatment equipment for transmission shaft machining, which solves the technical problem of affecting the machining precision caused by the dislocation offset of the two end fixing points of the transmission shaft due to the different stresses of the two end fixing points of the transmission shaft during the machining process.

[0006] The application provides a surface treatment equipment for transmission shaft machining, which includes a machine body, a treatment assembly arranged at the front end of the machine body for polishing and fixing the transmission, and a clamping assembly, the clamping assembly includes a movable seat arranged at the front end of the machine body, a chuck is rotatably connected to the front end of the movable seat through a fixed seat, and a third motor for driving the chuck to rotate is fixedly connected to the outer side of the movable seat. The surface of the fixed seat is provided with an anti-offset component for fixing the end of the transmission shaft to prevent it from being offset during the machining process, the anti-offset component includes a rectangular column fixedly connected to the output shaft of the third motor, and the other end of the rectangular column penetrates into the interior of the chuck and is connected between the chucks through a first spring, a driving arm is slidably penetrated into the surface of the fixed seat, and a connecting arm is fixedly connected to the surface of the fixed seat, the driving arm and the connecting arm are both rotatably connected to the clamping arm through a first rotating shaft, and the diameter of one end of the chuck close to the rectangular column is in a decreasing state.

[0007] As a further optimization scheme of the present application, the processing assembly comprises a first movable groove opened at the front end of the body, and a transverse sliding rail is fixedly connected inside the first movable groove, the outer portion of the transverse sliding rail is slidingly connected with a connecting seat through a longitudinal sliding rail, and the other end of the connecting seat is fixedly connected with a protective shell, one side of the protective shell is fixedly connected with a first motor, and the output shaft of the first motor penetrates into the interior of the protective shell and is fixedly connected with a polishing wheel.

[0008] As a further optimization scheme of the present application, the clamping arm at the upper end comprises a fixed arm rotatably connected with the driving arm and the connecting arm, and a movable arm slidingly penetrating into the fixed arm, and the movable arm and the fixed arm are connected through a second spring, the top of the movable arm is fixedly connected with a first magnet, and the two sides of the protective shell are fixedly connected with second magnets.

[0009] As a further optimization scheme of the present application, the inside of the chuck is provided with a correction assembly, the correction assembly comprises a mounting seat slidingly connected in the inside of the chuck, and a first ball is embedded in the inside of the mounting seat, the first ball penetrates and extends to the outside of the chuck, a third spring is fixedly connected between the mounting seat and the chuck, a locking pin slidingly penetrates the surface of the mounting seat, a fourth spring is fixedly connected between the locking pin and the mounting seat, and a lock hole matched with the locking pin is formed in the inside of the chuck.

[0010] As a further optimization scheme of the present application, the front end of the body is also provided with an anti-swing assembly for reducing the swing range of the transmission shaft in the machining process, the anti-swing assembly comprises a support column arranged at the front end of the body, and a bracket slidingly penetrates the upper end of the support column, a fifth spring is fixedly connected between the bracket and the support column, and a clamping hoop is rotatably connected through a second rotating shaft at the front and rear ends of the support column, and the inner side of the clamping hoop is fixedly connected with intermeshing tooth blocks on the surface of the bracket.

[0011] As a further optimization scheme of the present application, the body and the clamping hoop are provided with an inflation unit, the clamping hoop is formed by bonding the metal parts on both sides and the elastic expansion part in the middle, one side of the elastic expansion part is provided with a pressure valve, and the surface of the inner metal part is movably embedded with a second ball.

[0012] As a further optimization scheme of the present application, the front portion of the body is provided with a sliding groove for supporting the sliding of the support column, piezoelectric ceramic balls are fixedly embedded in the inside of the inner metal part, and the second ball is made of conductive metal material.

[0013] As a further optimization scheme of the present application, the inflation unit comprises a third movable groove opened in the inside of the body, and a folding capsule is movably connected in the inside of the third movable groove, a third magnet magnetically attracted to the movable seat is fixedly connected to the top of the folding capsule, and an air guide pipe in communication with the clamping hoop is fixedly connected to the front end of the folding capsule.

[0014] As a further optimization scheme of the present application, the clamping assembly further comprises a second movable groove opened at the front end of the body, and a bidirectional screw rod is rotatably connected inside the second movable groove, the movable seat is screw-connected with the outside of the bidirectional screw rod, and a second motor for driving the bidirectional screw rod is fixedly connected to one side of the body.

[0015] The present application has the following advantages: 1. The surface treatment equipment for transmission shaft machining can prevent the transmission shaft and the chuck from deviating from each other due to uneven stress during machining, thereby ensuring the stability of the transmission shaft during machining, ensuring the surface treatment precision of the transmission shaft, and ensuring the polishing efficiency without hindering the polishing operation.

[0016] 2. The surface treatment equipment for transmission shaft machining can ensure that the chuck and the axis of the transmission shaft are on the same horizontal line, so that the interval between the transmission shaft and the polishing wheel remains consistent during machining, thereby improving the accuracy of the transmission shaft surface polishing treatment.

[0017] 3. The surface treatment equipment for transmission shaft machining can fix the transmission shaft by the clamping hoop at the end of the transmission shaft, increase the support points of the transmission shaft, and reduce the polishing precision error caused by different swing amplitudes of different parts of the transmission shaft during machining, thereby improving the accuracy of the transmission shaft surface polishing. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the anti-deviation assembly structure of the present application; Figure 3 is a schematic diagram of the correction assembly structure of the present application; Figure 4 is a schematic diagram of the cross-sectional structure of the clamping arm of the present application; Figure 5 is an enlarged view of A in the present application; Figure 1 Figure 6 is a schematic diagram of the cross-sectional structure of the mounting seat of the present application; Figure 7 is a schematic diagram of the swing assembly structure of the present application; Figure 8 is an enlarged view of B in the present application; Figure 7 Figure 9 is a schematic diagram of the air charging unit of the present application; Figure 10 ​​A schematic diagram of the explosive structure of the clamping hoop of the present invention.

[0019] In the picture: 10. Organism; 20. Processing component; 21. First movable slot; 22. Transverse slide rail; 23. Longitudinal slide rail; 24. Connecting seat; 25. Protective shell; 26. Polishing wheel; 27. First motor; 30. Clamping assembly; 31. Second movable slot; 32. Bidirectional lead screw; 33. Second motor; 34. Movable seat; 35. Fixed seat; 36. Chuck; 37. Third motor; 40. Anti-deviation component; 41. Rectangular column; 42. First spring; 43. Drive arm; 44. Clamping arm; 441. Fixed arm; 442. Movable arm; 443. Second spring; 45. Connecting arm; 46. First pivot; 47. First magnet; 48. Second magnet; 50. Correction assembly; 51. First ball bearing; 52. Mounting base; 53. Third spring; 54. Locking hole; 55. Locking pin; 56. Fourth spring; 60. Anti-sway assembly; 61. Support column; 62. Bracket; 63. Fifth spring; 64. Clamping hoop; 641. Metal part; 642. Elastic telescopic part; 643. Pressure valve; 644. Second ball bearing; 645. Piezoelectric ceramic ball; 65. Second rotating shaft; 66. Tooth block; 67. Inflation unit; 671. Third movable groove; 672. Folded bladder; 673. Third magnet; 674. Air guide tube; 68. Slide groove. Detailed Implementation

[0020] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0021] like Figure 1 and Figure 5 As shown, a surface treatment device for processing a transmission shaft according to an embodiment of the present invention includes a body 10 and a processing component 20 and a clamping component 30 disposed at the front end of the body 10 for polishing and fixing the transmission shaft. The clamping component 30 includes a movable seat 34 disposed at the front end of the body 10. The front end of the movable seat 34 is rotatably connected to a chuck 36 via a fixed seat 35, and a third motor 37 for driving the chuck 36 to rotate is fixedly connected to the outside of the movable seat 34. The clamping assembly 30 also includes a second movable slot 31 opened at the front end of the machine body 10, and a bidirectional lead screw 32 is rotatably connected inside the second movable slot 31. The movable seat 34 is screw-driven and connected to the outside of the bidirectional lead screw 32. A second motor 33 for driving the bidirectional lead screw 32 is fixedly connected to one side of the machine body 10. The processing component 20 includes a first movable groove 21 opened at the front end of the body 10, and a transverse slide rail 22 is fixedly connected inside the first movable groove 21. A connecting seat 24 is slidably connected to the outside of the transverse slide rail 22 through a longitudinal slide rail 23. A protective shell 25 is fixedly connected to the other end of the connecting seat 24. A first motor 27 is fixedly connected to one side of the protective shell 25, and the output shaft of the first motor 27 passes through the inside of the protective shell 25 and is fixedly connected to a polishing wheel 26.

[0022] It should be noted that, firstly, the second motor 33 drives the bidirectional lead screw 32 to rotate, so that the bidirectional lead screw 32 applies a rotational force to the movable seat 34. Since the movable seat 34 is restricted by the second movable groove 31 and cannot rotate, and the movable seat 34 and the bidirectional lead screw 32 are connected by a screw drive, the bidirectional lead screw 32 will drive the movable seat 34 to move horizontally on its surface after rotating, so that the two movable seats 34 move closer to each other and use the chucks 36 at their ends to clamp and fix the transmission shaft to be processed from both ends. Then, the third motor 37 drives the chucks 36 to drive the transmission shaft to rotate. During the rotation of the drive shaft, the position of the polishing wheel 26 can be adjusted by the sliding of the longitudinal slide rail 23 on the surface of the transverse slide rail 22 and the sliding of the connecting seat 24 on the surface of the longitudinal slide rail 23, which facilitates polishing of different areas of the drive shaft. It should be noted that the movement of the longitudinal slide rail 23 and the connecting seat 24 is controlled by a stepper motor, which is existing technology and its detailed principle will not be described here. After the polishing position is adjusted, the first motor 27 drives the polishing wheel 26 to rotate to perform polishing work on the drive shaft. During the polishing process, the protective shell 25 can reduce the range of splashing debris generated during polishing and improve the safety of polishing operations.

[0023] like Figures 1 to 3 As shown, the surface of the fixed base 35 is provided with an anti-deviation component 40 for fixing the end of the transmission shaft to prevent it from deviating during processing. The anti-deviation component 40 includes a rectangular post 41 fixedly connected to the output shaft of the third motor 37, and the other end of the rectangular post 41 extends into the interior of the chuck 36 and is connected between the chucks 36 by a first spring 42. A drive arm 43 slides through the surface of the fixed base 35, and a connecting arm 45 is fixedly connected to the surface of the fixed base 35. Both the drive arm 43 and the connecting arm 45 are rotatably connected to the clamping arm 44 through a first rotating shaft 46. The diameter of the end of the chuck 36 near the rectangular post 41 decreases.

[0024] It should be noted that after the drive shaft is clamped by the chuck 36, as the movable seat 34 continues to move, the chuck 36 will be compressed into the interior of the fixed seat 35. As the chuck 36 continues to retract into the fixed seat 35, one end of the chuck 36 will come into contact with the drive arm 43. Since the diameter of the end of the chuck 36 near the drive arm 43 decreases, the retraction of the chuck 36 will compress the drive arm 43, causing the drive arm 43 to slide outward from the fixed seat 35. After the drive arm 43 slides outward from the fixed seat 35, the clamping arm 44 will rotate via the first rotating shaft 46 and reduce the angle between itself and the drive arm 43. At this time, the clamping arm 44 will rotate around the first rotating shaft 46 connected to the connecting arm 45, thereby... The other end of the clamping arm 44 moves towards the drive shaft and finally clamps and fixes the end of the drive shaft from all sides. The fixation of the clamping arm 44 can prevent the drive shaft from shifting between the drive shaft and the chuck 36 due to uneven force during the processing, thereby ensuring the stability of the drive shaft during the processing and ensuring that the surface treatment accuracy of the drive shaft is not affected. After polishing, when the clamping of the drive shaft is released, the chuck 36 can be pushed to reset under the action of the first spring 42. In addition, the chuck 36 is connected to the output shaft of the third motor 37 through a rectangular post 41, so that the chuck 36 can slide horizontally along the outside of the rectangular post 41 inside the fixed seat 35 without affecting the third motor 37 driving it to rotate the drive shaft.

[0025] like Figure 2 , Figure 4 and Figure 5 As shown, the upper clamping arm 44 includes a fixed arm 441 rotatably connected to the drive arm 43 and the connecting arm 45, and a movable arm 442 that slides through the fixed arm 441. The movable arm 442 is connected to the fixed arm 441 by a second spring 443. A first magnet 47 is fixedly connected to the top of the movable arm 442, and a second magnet 48 is fixedly connected to both sides of the protective shell 25.

[0026] It should be noted that when the polishing wheel 26 polishes the end of the drive shaft, as the polishing wheel 26 approaches the end of the drive shaft, the second magnet 48 on the protective shell 25 and the first magnet 47 on the movable arm 442 approach synchronously. Since the opposing magnetic poles of the first magnet 47 and the second magnet 48 are the same, as the polishing wheel 26 approaches the end of the drive shaft, it will push the movable arm 442 in the upper clamping arm 44 to retract into the fixed arm 441 under the action of magnetic repulsion, thereby releasing the clamping arm 44 from obstructing the upper area of ​​the drive shaft. Furthermore, since the drive shaft rotates with the chuck 36 under the drive of the third motor 37, the polishing wheel 26 can normally polish the end of the drive shaft. While achieving stable clamping of the drive shaft, it will not hinder the polishing operation, ensuring polishing efficiency. After polishing is completed, the polishing wheel 26 is removed to release the magnetic repulsion. Under the push of the second spring 443, the movable arm 442 extends out of the fixed arm 441 to continue clamping and positioning the end of the drive shaft.

[0027] like Figure 2 , Figure 3 and Figure 6 As shown, the collet 36 has a correction component 50 inside. The correction component 50 includes a mounting base 52 slidably connected inside the collet 36. A first ball bearing 51 is embedded inside the mounting base 52. The first ball bearing 51 passes through and extends to the outside of the collet 36. A third spring 53 is fixedly connected between the mounting base 52 and the collet 36. A locking pin 55 slides through the surface of the mounting base 52. A fourth spring 56 is fixedly connected between the locking pin 55 and the mounting base 52. A locking hole 54 that matches the locking pin 55 is opened inside the collet 36.

[0028] It should be noted that after the chuck 36 clamps the drive shaft, it cannot be guaranteed that it is clamping the axis of the drive shaft. If there is a deviation in the clamping position, the distance between the drive shaft and the polishing wheel 26 will change continuously during the rotation, which will result in uneven polishing of the drive shaft surface. Based on this, a correction component 50 is provided inside the chuck 36. When the chuck 36 clamps the drive shaft, in conjunction with the anti-deviation component 40, the clamping arms 44 will move closer to the drive shaft from multiple directions. If the chuck 36 is fixed at the center of the drive shaft, multiple clamping arms 44 will contact the drive shaft simultaneously. If the chuck 36 is not fixed at the center of the drive shaft, one or more clamping arms 44 will contact the drive shaft first. The clamping arm 44 that contacts the drive shaft first will, during the movement, guide the drive shaft towards the clamping arms 44 that are not in contact with it. A thrust is applied in four directions, causing the first ball bearing 51 to be movably embedded at the end of the chuck 36. This pushes the drive shaft, causing the first ball bearing 51 to roll and adjust its position until the drive shaft contacts the multi-directional clamping arm 44. At this point, the end axis of the drive shaft is aligned with the chuck 36. Then, the second motor 33 drives the movable seat 34 to slide along the surface of the bidirectional lead screw 32, causing the chuck 36 to press against the drive shaft and retract the first ball bearing 51 into the chuck 36, thereby reducing the impact on the drive shaft during machining. During the process, the probability of the first ball bearing 51 shifting is utilized to ensure its stability. The first ball bearing 51, retracted into the chuck 36, pushes the mounting base 52 to shift synchronously until the locking pin 55 on the mounting base 52 aligns with the locking hole 54 on the inner wall of the chuck 36. Then, when the drive shaft of the chuck 36 rotates, centrifugal force throws the locking pin 55 out of the mounting base 52 and into the locking hole 54. This uses the locking pin 55 to position the mounting base 52 and the first ball bearing 51, preventing the first ball bearing 51 from shifting during machining. The chuck 36 extends outward until the machining is completed, at which point the chuck 36 releases its grip on the drive shaft. Under the action of the fourth spring 56, the locking pin 55 is pulled and retracted into the mounting base 52. Under the action of the third spring 53, the first ball 51 is pushed outward from the chuck 36. By adjusting the clamping and fixing position of the drive shaft, the chuck 36 and the axis of the drive shaft are kept on the same horizontal line, so that the distance between the drive shaft and the polishing wheel 26 remains consistent during the machining rotation, thereby improving the accuracy of the polishing treatment of the drive shaft surface.

[0029] like Figure 1 and Figures 7 to 10 As shown, the front end of the machine body 10 is also provided with an anti-sway component 60 to reduce the swing amplitude of the transmission shaft during processing. The anti-sway component 60 includes a support column 61 located at the front end of the machine body 10, and a bracket 62 slides through the upper end of the support column 61. A fifth spring 63 is fixedly connected between the bracket 62 and the support column 61. Both the front and rear ends of the support column 61 are rotatably connected to a clamping hoop 64 through a second rotating shaft 65. The inner side of the clamping hoop 64 is fixedly connected to the surface of the bracket 62 with a meshing tooth block 66. An inflation unit 67 is provided between the body 10 and the clamping band 64. The clamping band 64 is formed by bonding the metal parts 641 on both sides and the elastic telescopic part 642 in the middle. A pressure valve 643 is provided on one side of the elastic telescopic part 642. A second ball bearing 644 is movably embedded on the surface of the inner metal part 641. The front of the body 10 is provided with a slide groove 68 for the support column 61 to slide, and a piezoelectric ceramic ball 645 is fixedly embedded in the inner metal part 641. The second ball 644 is made of conductive metal. The inflation unit 67 includes a third movable slot 671 opened inside the body 10, and a folded bladder 672 is movably connected inside the third movable slot 671. A third magnet 673 that is magnetically attracted to the movable seat 34 is fixedly connected to the top of the folded bladder 672, and an air guide tube 674 that communicates with the clamping hoop 64 is fixedly connected to the front end of the folded bladder 672.

[0030] It should be noted that, because the drive shaft is relatively long, if it is fixed only from the end during machining, the swing amplitude in the middle is larger than that at the end as the drive shaft rotates during machining, which will lead to errors in the machining accuracy of different areas of the drive shaft. Based on this, an anti-sway component 60 is provided at the front of the body 10. When fixing the drive shaft, the drive shaft can be placed on the bracket 62 first to ensure that the drive shaft remains balanced, so that the height of both ends is consistent when the drive shaft is clamped. After the drive shaft is placed on the bracket 62, the weight of the drive shaft will press down on the bracket 62 and retract it into the support column 61. As the bracket 62 moves down, the toothed blocks 66 on its surface will mesh with the toothed blocks 66 on the surface of the second rotating shaft 65, and drive the second rotating shaft 65. 5. When rotation occurs, the second rotating shaft 65 rotates, causing the clamping hoop 64 to rotate, thereby clamping the drive shaft and initially fixing the middle part of the drive shaft. Then, when the movable seat 34 moves and causes the chuck 36 to clamp the end of the drive shaft, the movable seat 34 will move synchronously through magnetic attraction, causing the two third magnets 673 to move closer to each other and squeeze the folded bladder 672. After the folded bladder 672 is squeezed, the gas inside it is squeezed out through the air guide tube 674. The elastic expansion part 642 expands and deforms inside the clamping hoop 64, pushing the inner metal part 641 to adhere to and clamp the drive shaft, thus completing the secondary reinforcement of the drive shaft. When the diameter of the drive shaft is large, the elastic expansion part 642 can complete the clamping and fixing of the drive shaft with a small expansion range. At this time, as the gas inside the clamping hoop 64 increases, when the threshold of the pressure valve 643 is reached, the excess gas can be discharged to the outside of the clamping hoop 64, realizing the fixing of drive shafts of different diameters. After the drive shaft is fixed by the clamping hoop 64, the drive shaft contacts the second ball 644 inside the clamping hoop 64. Therefore, when the drive shaft rotates, it rolls and rubs against the second ball 644, so that the clamping hoop 64 fixes the drive shaft without affecting the rotation of the drive shaft. By fixing the drive shaft from the end by the clamping hoop 64, the support points of the drive shaft are increased, the polishing accuracy error caused by the different swing amplitudes of various parts of the drive shaft due to rotation during the processing is reduced, and the accuracy of polishing the surface of the drive shaft is improved. In addition, when the drive shaft rotates, it drives the second ball 644 to rotate synchronously. When the second ball 644 rotates, it continuously squeezes and rubs against the piezoelectric ceramic ball 645 inside the metal part 641, thereby causing the piezoelectric ceramic ball 645 to generate current. Since the second ball 644 is made of conductive metal, the current generated by the piezoelectric ceramic ball 645 is conducted to the drive shaft through the second ball 644. In this way, the electro-ion generated by the current reacts with the static charge to eliminate the attraction force of static electricity on the drive shaft surface on polishing debris, thus preventing debris from adhering to the drive shaft surface and affecting the polishing accuracy, and further ensuring the precision of the drive shaft surface treatment.

[0031] The embodiments of the present invention have been described above, but the embodiments are not limited to the specific implementation methods described above. The specific implementation methods described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the embodiments described above, all of which are within the protection scope of the embodiments described above.

Claims

1. A surface treatment apparatus for machining a transmission shaft, comprising a body (10) and a processing assembly (20) and a clamping assembly (30) disposed at the front end of the body (10) for polishing and fixing the transmission shaft, characterized in that: The clamping assembly (30) includes a movable seat (34) located at the front end of the body (10). The front end of the movable seat (34) is rotatably connected to a chuck (36) via a fixed seat (35), and a third motor (37) for driving the chuck (36) to rotate is fixedly connected to the outside of the movable seat (34). The surface of the fixed seat (35) is provided with an anti-offset component (40) for fixing the end of the transmission shaft to prevent it from shifting during processing. The anti-offset component (40) includes a rectangular column (41) fixedly connected to the output shaft of the third motor (37), and the other end of the rectangular column (41) extends into the interior of the chuck (36) and is connected between the chucks (36) by a first spring (42). The surface of the fixed seat (35) is slidably connected with a drive arm (43), and the surface of the fixed seat (35) is fixedly connected with a connecting arm (45). The drive arm (43) and the connecting arm (45) are rotatably connected to the clamping arm (44) through a first rotating shaft (46). The diameter of the end of the chuck (36) near the rectangular column (41) decreases.

2. The surface treatment equipment for machining transmission shafts according to claim 1, characterized in that: The processing component (20) includes a first movable slot (21) opened at the front end of the body (10), and a transverse slide rail (22) is fixedly connected inside the first movable slot (21). A connecting seat (24) is slidably connected to the outside of the transverse slide rail (22) through a longitudinal slide rail (23), and a protective shell (25) is fixedly connected to the other end of the connecting seat (24). A first motor (27) is fixedly connected to one side of the protective shell (25), and the output shaft of the first motor (27) passes through the inside of the protective shell (25) and is fixedly connected to a polishing wheel (26).

3. The surface treatment equipment for machining transmission shafts according to claim 2, characterized in that: The upper clamping arm (44) includes a fixed arm (441) rotatably connected to the drive arm (43) and the connecting arm (45) and a movable arm (442) sliding through the interior of the fixed arm (441). The movable arm (442) is connected to the fixed arm (441) by a second spring (443). A first magnet (47) is fixedly connected to the top of the movable arm (442), and a second magnet (48) is fixedly connected to both sides of the protective shell (25).

4. The surface treatment equipment for machining transmission shafts according to claim 3, characterized in that: The collet (36) is provided with a correction component (50). The correction component (50) includes a mounting base (52) slidably connected inside the collet (36). A first ball (51) is embedded inside the mounting base (52). The first ball (51) passes through and extends to the outside of the collet (36). A third spring (53) is fixedly connected between the mounting base (52) and the collet (36). A locking pin (55) slidably passes through the surface of the mounting base (52). A fourth spring (56) is fixedly connected between the locking pin (55) and the mounting base (52). A locking hole (54) adapted to the locking pin (55) is opened inside the collet (36).

5. The surface treatment equipment for machining transmission shafts according to claim 1, characterized in that: The front end of the machine body (10) is also provided with an anti-sway component (60) to reduce the swing amplitude of the transmission shaft during processing. The anti-sway component (60) includes a support column (61) located at the front end of the machine body (10), and a bracket (62) slides through the upper end of the support column (61). A fifth spring (63) is fixedly connected between the bracket (62) and the support column (61). Both the front and rear ends of the support column (61) are rotatably connected to a clamping hoop (64) through a second rotating shaft (65). The inner side of the clamping hoop (64) is fixedly connected to the surface of the bracket (62) with a meshing tooth block (66).

6. The surface treatment equipment for machining transmission shafts according to claim 5, characterized in that: An inflation unit (67) is provided between the body (10) and the clamping band (64). The clamping band (64) is formed by bonding the metal parts (641) on both sides and the elastic telescopic part (642) in the middle. A pressure valve (643) is provided on one side of the elastic telescopic part (642). A second ball bearing (644) is movably embedded on the surface of the inner metal part (641).

7. The surface treatment equipment for machining transmission shafts according to claim 6, characterized in that: The front of the body (10) is provided with a sliding groove (68) for the sliding of the support column (61), and the inner side of the metal part (641) is fixedly embedded with a piezoelectric ceramic ball (645), and the second ball (644) is made of conductive metal.

8. The surface treatment equipment for machining transmission shafts according to claim 7, characterized in that: The inflation unit (67) includes a third movable slot (671) opened inside the body (10), and a folded bladder (672) is movably connected inside the third movable slot (671). The top of the folded bladder (672) is fixedly connected to a third magnet (673) that is magnetically attracted to the movable seat (34), and the front end of the folded bladder (672) is fixedly connected to an air guide tube (674) that communicates with the clamping hoop (64).

9. The surface treatment equipment for machining transmission shafts according to claim 1, characterized in that: The clamping assembly (30) further includes a second movable slot (31) opened at the front end of the machine body (10), and a bidirectional lead screw (32) is rotatably connected inside the second movable slot (31). The movable seat (34) is screw-driven and connected to the outside of the bidirectional lead screw (32). A second motor (33) for driving the bidirectional lead screw (32) is fixedly connected to one side of the machine body (10).

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