A clamping device for automatic machining of a differential housing and a clamping method thereof

Abstract

This invention relates to the field of clamping equipment technology, and discloses a clamping device and method for automatic machining of differential housings. The device includes a base plate, a hollow plate fixedly connected to the side wall of the base plate, a grooved plate rotatably connected to one end of the hollow plate, and an equipment cavity, a movable cavity, and a driving cavity formed inside the base plate. An air duct assembly and a driving assembly are fixedly connected to the side wall of the equipment cavity. An air transmission assembly is slidably connected inside the movable cavity, and an internal gear plate is rotatably connected to the inner surface of the driving cavity. Through the coordinated use of the air transmission assembly, the internal gear plate, the first passive assembly, the second passive assembly, and the third passive assembly, the device can perform both fixed and repositioning operations on the differential housing, as well as rotational cutting operations, by rotating the differential housing in both forward and reverse directions using a first motor. It can also reposition the air transmission assembly, thereby reducing energy consumption and improving the functionality of the device.

Description

Technical Field

[0001] This invention relates to the field of clamping equipment, and more specifically, to a clamping device and method for automatic machining of differential housings. Background Technology

[0002] The differential housing is an important component of a car's transmission system, such as... Figure 17 As shown, its main function is to fix and protect the internal parts of the differential, while also sealing and preventing lubricating oil leakage. The differential housing is usually made of aluminum alloy or cast iron, which has sufficient strength and corrosion resistance. During the production of the differential housing, the outer and inner sides of the differential housing need to be machined, which requires the use of clamping devices to fix the differential housing.

[0003] Currently, most clamping devices for automatic machining of differential housings on the market consist of a combination of jaws, airtight support components, a rotary cylinder, an air-injected tie rod, and a pull-back chuck. Users fix the differential housing using the jaws, then introduce gas into the air-injected tie rod to detect the housing's position. Finally, the rotary cylinder rotates the differential housing, allowing it to be machined internally and externally in conjunction with the internal and external machining equipment. However, the internal machining equipment removes some material from the machined area, and the external machining equipment further removes material from the same area, reducing its rigidity. This causes wall vibration during the external machining process, affecting the equipment's machining efficiency. Summary of the Invention

[0004] This invention provides a clamping device and clamping method for automatic machining of differential housing, which solves the technical problem in related technologies that causes wall vibration when the outer machining equipment processes the differential housing due to material removal.

[0005] This invention provides a clamping device and method for automatic machining of differential housings, comprising a base plate, a hollow plate fixedly connected to the side wall of the base plate, a grooved plate rotatably connected to one end of the hollow plate, an equipment cavity, a movable cavity, and a driving cavity formed inside the base plate, an air duct assembly and a driving assembly fixedly connected to the side wall of the equipment cavity, an air transmission assembly slidably connected inside the movable cavity, an internal gear plate rotatably connected to the inner surface of the driving cavity, a first passive assembly, a second passive assembly, and a third passive assembly rotatably connected to the side wall of the driving cavity, a transmission cavity and a shifting cavity formed inside the grooved plate, an external gear plate and transmission gears rotatably connected to the side wall of the transmission cavity, and a clamping assembly slidably connected inside the shifting cavity.

[0006] Preferably, the air intake assembly includes an air pump, the top of which is fixedly connected to an air extraction pipe, the top of which extends through the equipment cavity to the outer wall of the seat plate, and the side wall of the air pump is fixedly connected to an exhaust pipe, one end of which extends through the equipment cavity to the interior of the movable cavity.

[0007] Preferably, the drive assembly includes a first motor, and a first gear is fixedly connected to the surface of the output rod of the first motor, the outer surface of the first gear meshing with the inner surface of the internal gear plate.

[0008] Preferably, the air transmission assembly includes an air vent plate, a movable disc is fixedly connected to one side of the air vent plate, a transmission plate and a second gear are fixedly connected to the surface of the air vent plate, a first solenoid valve tube is fixedly connected to one side of the inner cavity of the movable disc, and a second solenoid valve tube is fixedly connected to the top of the movable disc.

[0009] Preferably, one end of the movable disc has a moving groove and a protective cavity. A second motor is fixedly connected to the top of the protective cavity, and a limiting rod is fixedly connected to the bottom of the moving groove. A moving plate is slidably connected to the surface of the output rod of the second motor and the limiting rod. A third motor is fixedly connected to the side wall of the moving plate. An air transmission plate is fixedly connected to the surface of the output rod of the third motor. An installation groove is opened at the top of the air transmission plate, and an airbag is fixedly connected to the bottom of the installation groove. The bottom of the air transmission plate is connected to one end of the first solenoid valve tube.

[0010] Preferably, the first passive component includes a guide rod, a first ratchet disk is fixedly connected to the surface of the guide rod, a third gear is rotatably connected to one side of the first ratchet disk, the outer surface of the third gear meshes with the inner surface of the internal gear plate, a guide plate is slidably connected to the surface of the guide rod, and the plate body of the guide plate contacts the transmission plate and the second gear.

[0011] Preferably, the second passive component includes a first rotating rod, and a fourth gear is fixedly connected to the surface of the first rotating rod.

[0012] Preferably, the third passive component includes a second rotating rod, on the surface of which a second ratchet disc, a fifth gear, a sixth gear, and a seventh gear are fixedly connected. An eighth gear is rotatably connected to one side of the second ratchet disc, and the outer surface of the sixth gear meshes with the outer surface of the fourth gear.

[0013] Preferably, the clamping assembly includes a toothed plate, a connecting plate is fixedly connected to one side of the toothed plate, a clamping claw is fixedly connected to the side of the connecting plate away from the toothed plate, the outer surface of the outer toothed plate meshes with the outer surface of the transmission gear, and the outer surface of the transmission gear contacts one side of the toothed plate.

[0014] The clamping method of the above-mentioned clamping device for automatic machining of differential housing includes the following steps:

[0015] Step 1: Clamp the differential housing;

[0016] The first motor is directly operated, causing the first gear to drive the internal gear plate to rotate. This, in turn, causes the internal gear plate to drive the eighth gear and the second ratchet plate to rotate. Then, the fifth gear drives the second gear and the vent plate to rotate, which in turn allows the outer gear plate to drive the transmission gears to rotate. This allows the locking pawl to clamp the differential housing. Then, the air pump and the second solenoid valve tube are operated. The air pump can spray air into the vent plate, while the second solenoid valve tube can discharge gas into the interior of the outer gear plate. The position of the differential housing is then detected by air pressure.

[0017] Step 2: Rotate the differential housing using internal machining equipment;

[0018] When the internal machining equipment contacts the inner cavity of the differential housing, the first motor can be reversed, causing the first gear to drive the internal gear plate to rotate in the opposite direction. This causes the internal gear plate to drive the third gear and the first ratchet disc to rotate, which in turn allows the guide plate to move along with the vent plate, the transmission plate, and the second gear. This allows the vent plate to work on the external gear plate and the slotted disc. Then, the first motor is reversed, causing the external gear plate and the slotted disc to rotate simultaneously, allowing the internal machining equipment to perform machining work on the inside of the differential housing.

[0019] Step 3: Perform vibration damping and support work on the inside of the differential housing;

[0020] After the outer processing equipment contacts the outer side of the differential housing, the first motor continues to run in the reverse direction, causing the vent plate, transmission plate, and second gear to move. This prevents the vent plate from working on the outer gear plate and groove plate. Then, the second and third motors are run, causing the transmission plate and air bag to contact the inner side of the differential housing. Then, the air pump and the first solenoid valve tube are run, allowing gas to enter the air bag and inflate it. This allows the air bag to make full contact with the inner side of the differential housing. Then, while the outer processing equipment is rotating and processing the outer side of the differential housing, the first motor runs in the forward direction, allowing the air bag to support the inner side of the differential housing.

[0021] Step 4: Loosen the clamps on the differential housing;

[0022] The first motor is reversed, causing the second gear to move to the fourth gear and allowing the vent plate to work on the outer gear plate. Then, the first motor is reversed, causing the second rotating rod to rotate the sixth gear, which in turn drives the fourth gear to rotate. The fourth gear then drives the second gear to rotate, causing the vent plate to rotate in the opposite direction with the outer gear plate, thus allowing the locking claw to separate from the differential housing.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. The clamping device and clamping method for automatic machining of differential housing, through the coordinated use of air transmission assembly, internal gear plate, first passive assembly, second passive assembly and third passive assembly, enables the equipment to perform fixed unloading work on differential housing, as well as rotational auxiliary cutting work on differential housing, and can also perform position displacement work on air transmission assembly through forward and reverse operation of the first motor, thereby reducing energy consumption and improving the functionality of the equipment.

[0025] 2. The clamping device and clamping method for automatic machining of the differential housing, through the cooperation of the second motor and the third motor, enable the air transmission plate and air bag to move up and down and rotate. With the displacement of the air transmission assembly, the air transmission plate and air bag can contact the interior of the differential housing after internal cutting. Then, with the rotation of the air transmission assembly, when the external cutting equipment is machining the exterior of the differential housing, the air bag can support and dampen the cutting part of the differential housing, thereby improving the machining quality of the differential housing.

[0026] 3. The clamping device and clamping method for automatic machining of the differential housing, through the coordinated use of the air bleed assembly, the first solenoid tube and the second solenoid tube, can detect the position of the differential housing when the clamping claws are clamping the differential housing, and can also increase the supporting force of the airbag when the air plate and airbag are supporting and damping the inside of the differential housing, thereby improving the support efficiency of the equipment and thus improving the working quality of the equipment. Attached Figure Description

[0027] Figure 1 This is a diagram of the main structure of the present invention;

[0028] Figure 2 This is a cross-sectional view of the structure of the present invention up to the center of the air intake assembly;

[0029] Figure 3 yes Figure 2 Enlarged view of point A;

[0030] Figure 4 yes Figure 2 Enlarged view of point B;

[0031] Figure 5 yes Figure 2 Enlarged view of point C;

[0032] Figure 6 yes Figure 2 Enlarged view of point D;

[0033] Figure 7 This is a cross-sectional view of the structure of the present invention up to the center of the first solenoid valve tube;

[0034] Figure 8 yes Figure 7 Enlarged view of point E;

[0035] Figure 9 This is a top sectional view of the structure of the present invention up to the center of the air intake assembly;

[0036] Figure 10 yes Figure 9 Enlarged view at point F;

[0037] Figure 11 This is a top sectional view of the structure of the present invention up to the center of the second passive component;

[0038] Figure 12 yes Figure 11 Enlarged view of point G;

[0039] Figure 13 This is a top sectional view of the structure of the present invention up to the center of the third motor;

[0040] Figure 14 yes Figure 13 Enlarged view of point H;

[0041] Figure 15 This is a side sectional view of the structure of the present invention up to the center of the clamping assembly;

[0042] Figure 16 This is a side sectional view of the structure of the present invention up to the center of the outer toothed plate;

[0043] Figure 17 This is a main diagram of the differential manufactured using the structure of this invention.

[0044] In the diagram: 1. Seat plate; 2. Hollow plate; 3. Slotted plate; 4. Air duct assembly; 5. Drive assembly; 6. Air transmission assembly; 7. Internal gear plate; 8. First passive assembly; 9. Second passive assembly; 10. Third passive assembly; 11. External gear plate; 12. Transmission gear; 13. Clamping assembly; 14. Air pump; 15. Air extraction pipe; 16. Exhaust pipe; 17. First motor; 18. First gear; 19. Vent plate; 20. Movable plate; 21. Transfer plate; 22. Second gear; 23. First solenoid valve tube ; 24. Second solenoid valve tube; 25. Second motor; 26. Limiting rod; 27. Moving plate; 28. Third motor; 29. ​​Air transmission plate; 30. Airbag; 31. Guide rod; 32. First pawl disc; 33. Third gear; 34. Guide plate; 35. First rotating rod; 36. Fourth gear; 37. Second rotating rod; 38. Second pawl disc; 39. Fifth gear; 40. Sixth gear; 41. Seventh gear; 42. Eighth gear; 43. Tooth plate; 44. Connecting plate; 45. Locking claw. Detailed Implementation

[0045] 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.

[0046] like Figures 1-16 As shown, a clamping device and clamping method for automatic machining of differential housing includes a base plate 1, a hollow plate 2 fixedly connected to the side wall of the base plate 1, a grooved plate 3 rotatably connected to one end of the hollow plate 2, an equipment cavity, a movable cavity and a driving cavity opened inside the base plate 1, an air induced assembly 4 and a driving assembly 5 fixedly connected to the side wall of the equipment cavity, the air induced assembly 4 includes an air pump 14, an air extraction pipe 15 fixedly connected to the top of the air pump 14, the top of the air extraction pipe 15 extends through the equipment cavity to the outer wall of the base plate 1, and an exhaust pipe 16 fixedly connected to the side wall of the air pump 14, one end of the exhaust pipe 16 extends through the equipment cavity to the interior of the movable cavity;

[0047] In this embodiment, the operation of the air pump 14 allows the air extraction pipe 15 to extract gas from outside the seat plate 1, and then the gas can be discharged through the exhaust pipe 16.

[0048] The drive assembly 5 includes a first motor 17, a first gear 18 is fixedly connected to the surface of the output rod of the first motor 17, the outer surface of the first gear 18 meshes with the inner surface of the inner gear plate 7, and the inner surface of the drive cavity is rotatably connected to the inner gear plate 7.

[0049] In this embodiment, the operation of the first motor 17 causes the first gear 18 to drive the internal gear plate 7 to rotate. The forward rotation of the first gear 18 will cause the internal gear plate 7 to rotate in the opposite direction, and the reverse rotation of the first gear 18 will cause the internal gear plate 7 to rotate in the forward direction.

[0050] An air transmission assembly 6 is slidably connected inside the active cavity. The air transmission assembly 6 includes a vent plate 19. A movable plate 20 is fixedly connected to one side of the vent plate 19. A moving groove and a protective cavity are opened at one end of the movable plate 20. A second motor 25 is fixedly connected to the top of the protective cavity. A limiting rod 26 is fixedly connected to the bottom of the moving groove. A moving plate 27 is slidably connected to the surface of the output rod of the second motor 25 and the surface of the limiting rod 26. A third motor 28 is fixedly connected to the side wall of the moving plate 27. An air transmission plate 29 is fixedly connected to the surface of the output rod of the third motor 28. An installation groove is opened at the top of the air transmission plate 29. An airbag 30 is fixedly connected to the bottom of the installation groove. The bottom of the air transmission plate 29 is connected to one end of the first magnetic valve tube 23. A transmission plate 21 and a second gear 22 are fixedly connected to the surface of the vent plate 19. A first magnetic valve tube 23 is fixedly connected to one side of the inner cavity of the movable plate 20. A second magnetic valve tube 24 is fixedly connected to the top of the movable plate 20.

[0051] In this embodiment, the operation of the second motor 25 enables the moving plate 27 to move up and down, while the operation of the third motor 28 enables the air transmission plate 29 to rotate with the air bag 30. The movable disk 20 can receive the gas discharged from the exhaust pipe 16, and then cooperate with the opening and closing of the first magnetic valve tube 23 or the second magnetic valve tube 24 to perform gas transmission work on the outer tooth plate 11 or the air bag 30.

[0052] It should be noted that the surface of the vent plate 19 is provided with protrusions. These protrusions can enter the slots in the center of the slotted plate 3 and the outer toothed plate 11. Then, when the vent plate 19 rotates, the slotted plate 3 and the outer toothed plate 11 can rotate according to the position of the protrusions.

[0053] The drive cavity is rotatably connected to a first passive component 8, a second passive component 9, and a third passive component 10. The first passive component 8 includes a guide rod 31, a first pawl disk 32 is fixedly connected to the surface of the guide rod 31, a third gear 33 is rotatably connected to one side of the first pawl disk 32, the outer surface of the third gear 33 meshes with the inner surface of the internal gear plate 7, a guide plate 34 is slidably connected to the surface of the guide rod 31, and the plate body of the guide plate 34 contacts the transmission plate 21 and the second gear 22. The second passive component 9 includes a first rotating rod 35, a fourth gear 36 is fixedly connected to the surface of the first rotating rod 35. The third passive component 10 includes a second rotating rod 37, a second pawl disk 38, a fifth gear 39, a sixth gear 40, and a seventh gear 41 are fixedly connected to the surface of the second rotating rod 37, an eighth gear 42 is rotatably connected to one side of the second pawl disk 38, and the outer surface of the sixth gear 40 meshes with the outer surface of the fourth gear 36.

[0054] In this embodiment, the reverse rotation of the internal gear plate 7 causes the eighth gear 42 to drive the second ratchet disc 38 to rotate in the forward direction, which in turn causes the fifth gear 39, the sixth gear 40, and the seventh gear 41 to rotate in the forward direction. The forward rotation of the sixth gear 40 drives the fourth gear 36 to rotate in the reverse direction, while the forward rotation of the internal gear plate 7 drives the third gear 33 to rotate the first ratchet disc 32 in the reverse direction. This, in turn, causes the guide plate 34 to drive the vent plate 19, the transfer plate 21, and the second gear 22 to move.

[0055] It should be noted that the protrusion of the vent plate 19 can move between the groove plate 3 and the outer toothed plate 11, inside the outer toothed plate 11, and outside the groove plate 3 and the outer toothed plate 11. When the protrusion of the vent plate 19 moves between the groove plate 3 and the outer toothed plate 11, the second gear 22 will contact the outer surface of the fifth gear 39 near the second ratchet disk 38. When the protrusion of the vent plate 19 moves inside the outer toothed plate 11, the second gear 22 will have two positions. One position is in contact with the outer surface of the fifth gear 39 away from the second ratchet disk 38, and the other position is in contact with the outer surface of the fourth gear 36. When the vent plate 19 moves to the outside of the groove plate 3 and the outer toothed plate 11, the second gear 22 will contact the surface of the seventh gear 41.

[0056] The slot 3 has a transmission cavity and a transfer cavity inside. The side wall of the transmission cavity is rotatably connected to an outer toothed plate 11 and a transmission tooth 12. The transfer cavity is slidably connected to a clamping assembly 13. The clamping assembly 13 includes a toothed plate 43. A connecting plate 44 is fixedly connected to one side of the toothed plate 43. A locking claw 45 is fixedly connected to the side of the connecting plate 44 away from the toothed plate 43. The outer surface of the outer toothed plate 11 meshes with the outer surface of the transmission tooth 12. The outer surface of the transmission tooth 12 contacts one side of the toothed plate 43.

[0057] In this embodiment, when the outer toothed plate 11 rotates, the transmission tooth 12 will rotate, thereby allowing the toothed plate 43 to move along with the connecting plate 44 and the locking claw 45.

[0058] The clamping method of the above-mentioned automatic machining clamping device for differential housing includes the following steps:

[0059] Step 1: Clamp the differential housing;

[0060] The first motor 17 operates in the forward direction, causing the first gear 18 to drive the internal gear plate 7 to rotate in the reverse direction. This causes the internal gear plate 7 to drive the eighth gear 42 and the second ratchet disc 38 to rotate in the forward direction. This causes the second rotating rod 37 to drive the fifth gear 39, the sixth gear 40, and the seventh gear 41 to rotate in the forward direction. The fifth gear 39 can drive the second gear 22 and the vent plate 19 to rotate in the reverse direction, which in turn allows the outer gear plate 11 to drive the transmission gear 12 to rotate in the forward direction. This allows the locking pawl 45 to move inward, thereby clamping the differential housing. Then, the vacuum pump 14 and the second solenoid valve tube 24 are operated. The vacuum pump 14 can spray air into the vent plate 19, and then the air passes through the second solenoid valve tube 24 into the interior of the outer gear plate 11. The air pressure is then used to detect the position of the differential housing.

[0061] Step 2: Rotate the differential housing using internal machining equipment;

[0062] When the internal processing equipment contacts the inner cavity of the differential housing, the first motor 17 can be reversed, causing the first gear 18 to drive the internal gear plate 7 to rotate in the opposite direction. This causes the internal gear plate 7 to drive the third gear 33 and the first ratchet disc 32 to rotate in the forward direction. This allows the guide plate 34 to move along with the vent plate 19, the transfer plate 21, and the second gear 22. This causes the protrusions on the surface of the vent plate 19 to move to the slotted disc 3 and the outer gear plate 11. Then, the first motor 17 is reversed, causing the fifth gear 39, the sixth gear 40, and the seventh gear 41 to rotate in the forward direction. This causes the second gear 22 and the vent plate 19 to drive the outer gear plate 11 and the slotted disc 3 to rotate in the opposite direction simultaneously. This allows the internal processing equipment to perform processing work on the inside of the differential housing.

[0063] Step 3: Perform vibration damping and support work on the inside of the differential housing;

[0064] After the outer processing equipment contacts the outer side of the differential housing, the first motor 17 continues to run in reverse, causing the vent plate 19, the transfer plate 21, and the second gear 22 to move. This causes the protrusion of the vent plate 19 to move out of the outer gear plate 11 and the slotted plate 3. Then, the third motor 28 runs, causing the air transfer plate 29 and the air bag 30 to rotate. The second motor 25 then runs, causing the moving plate 27 to move the air transfer plate 29 and the air bag 30 up and down, allowing the air transfer plate 29 and the air bag 30 to engage with the differential. The differential housing makes contact with the inside of the differential housing, and then the vacuum pump 14 and the first solenoid valve tube 23 are operated to allow gas to enter the air bag 30, thereby inflating the air bag 30 and allowing the air bag 30 to make full contact with the inside of the differential housing. Then, when the outer processing equipment performs rotational processing on the outer side of the differential housing, the first motor 17 is driven in the forward direction, so that the vent plate 19 drives the moving plate 27, the air transmission plate 29 and the air bag 30 to rotate independently, thereby allowing the air bag 30 to support the inside of the differential housing.

[0065] Step 4: Loosen the clamps on the differential housing;

[0066] The first motor 17 is reversed, causing the second gear 22 to move to the fourth gear 36 and the protrusion of the vent plate 19 to move to the outer gear plate 11. Then the first motor 17 is reversed, causing the second rotating rod 37 to rotate the sixth gear 40 in the forward direction. The sixth gear 40 then drives the fourth gear 36 to rotate in the reverse direction. The fourth gear 36 then drives the second gear 22 to rotate in the forward direction, which in turn causes the vent plate 19 to drive the transmission gear 12 to rotate in the reverse direction along with the outer gear plate 11. This allows the locking claw 45 to separate and move from the differential housing.

[0067] It should be noted that during the entire operation of the equipment, the initial position of the second gear 22 is on the side of the fifth gear 39 away from the second ratchet disk 38, and the outer surface of the second gear 22 meshes with the outer surface of the fifth gear 39.

[0068] The embodiments of this example have been described above. However, this example is 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 based on the guidance of this example, and all of them are within the protection scope of this example.

Claims

1. A clamping method for automatic machining of a differential housing, wherein the clamping method uses a clamping device for clamping, characterized in that, The clamping device includes a base plate (1), a hollow plate (2) is fixedly connected to the side wall of the base plate (1), a slotted plate (3) is rotatably connected to one end of the hollow plate (2), the base plate (1) has an equipment cavity, a movable cavity and a driving cavity inside, an air intake assembly (4) and a driving assembly (5) are fixedly connected to the side wall of the equipment cavity, an air transmission assembly (6) is slidably connected to the inside of the movable cavity, an internal toothed plate (7) is rotatably connected to the inner surface of the driving cavity, a first passive assembly (8), a second passive assembly (9) and a third passive assembly (10) are rotatably connected to the side wall of the driving cavity, a transmission cavity and a transfer cavity are opened inside the slotted plate (3), an external toothed plate (11) and a transmission tooth (12) are rotatably connected to the side wall of the transmission cavity, and a clamping assembly (13) is slidably connected to the inside of the transfer cavity. The air intake assembly (4) includes an air pump (14), the top of which is fixedly connected to an air extraction pipe (15), the top of which extends through the equipment cavity to the outer wall of the seat plate (1), and the side wall of the air pump (14) is fixedly connected to an exhaust pipe (16), one end of which extends through the equipment cavity to the interior of the movable cavity. The drive assembly (5) includes a first motor (17), and a first gear (18) is fixedly connected to the surface of the output rod of the first motor (17). The outer surface of the first gear (18) meshes with the inner surface of the internal gear plate (7). The air transmission assembly (6) includes an air vent plate (19), a movable disc (20) is fixedly connected to one side of the air vent plate (19), a transfer plate (21) and a second gear (22) are fixedly connected to the surface of the air vent plate (19), a first solenoid valve tube (23) is fixedly connected to one side of the inner cavity of the movable disc (20), and a second solenoid valve tube (24) is fixedly connected to the top of the movable disc (20). One end of the movable plate (20) is provided with a moving groove and a protective cavity. The top of the protective cavity is fixedly connected to a second motor (25), and the bottom of the moving groove is fixedly connected to a limiting rod (26). The output rod of the second motor (25) and the surface of the limiting rod (26) are slidably connected to a moving plate (27). The side wall of the moving plate (27) is fixedly connected to a third motor (28). The surface of the output rod of the third motor (28) is fixedly connected to an air transmission plate (29). The top of the air transmission plate (29) is provided with an installation groove. The bottom of the installation groove is fixedly connected to an airbag (30). The bottom of the air transmission plate (29) is connected to one end of the first magnetic valve tube (23). The clamping method includes the following steps: Step 1: Clamp the differential housing; The first motor (17) is directly operated, causing the first gear (18) to drive the internal gear plate (7) to rotate, which in turn causes the internal gear plate (7) to drive the eighth gear (42) and the second ratchet plate (38) to rotate. Then, the fifth gear (39) drives the second gear (22) and the vent plate (19) to rotate, which in turn allows the outer gear plate (11) to drive the transmission gear (12) to rotate, so that the locking pawl (45) can clamp the differential housing. Then, the vacuum pump (14) and the second solenoid valve tube (24) are operated. The vacuum pump (14) can spray air into the vent plate (19), while the second solenoid valve tube (24) can discharge gas into the outer gear plate (11), thereby detecting the position of the differential housing through air pressure. Step 2: Rotate the differential housing using internal machining equipment; When the internal processing equipment comes into contact with the inner cavity of the differential housing, the first motor (17) can be reversed, causing the first gear (18) to drive the internal gear plate (7) to rotate in the opposite direction. Then, the internal gear plate (7) drives the third gear (33) and the first ratchet disc (32) to rotate, which allows the guide plate (34) to move with the vent plate (19), the transmission plate (21) and the second gear (22), so that the vent plate (19) can work on the external gear plate (11) and the slotted disc (3). Then, the first motor (17) is reversed, causing the external gear plate (11) and the slotted disc (3) to rotate simultaneously, which allows the internal processing equipment to perform processing work on the inside of the differential housing. Step 3: Perform vibration damping and support work on the inside of the differential housing; After the outer processing equipment contacts the outer side of the differential housing, the first motor (17) continues to run in the reverse direction, causing the vent plate (19), the transfer plate (21), and the second gear (22) to move, thereby causing the vent plate (19) to stop working on the outer gear plate (11) and the slotted plate (3). Then the second motor (25) and the third motor (28) are run, causing the air transfer plate (29) and the air bag (30) to contact the inner side of the differential housing. Then the air pump (14) and the first solenoid valve tube (23) are run, causing gas to enter the air bag (30), thereby causing the air bag (30) to expand, and then allowing the air bag (30) to fully contact the inner side of the differential housing. Then, when the outer processing equipment performs rotational processing on the outer side of the differential housing, the first motor (17) runs in the forward direction, so that the air bag (30) can support the inner side of the differential housing. Step 4: Loosen the clamps on the differential housing; The first motor (17) is reversed, causing the second gear (22) to move to the fourth gear (36), and allowing the vent plate (19) to work on the outer gear plate (11). Then the first motor (17) is reversed, causing the second rotating rod (37) to rotate with the sixth gear (40), which in turn allows the sixth gear (40) to drive the fourth gear (36) to rotate. Then the fourth gear (36) drives the second gear (22) to rotate, which in turn causes the vent plate (19) to rotate with the outer gear plate (11) in the opposite direction, thereby allowing the locking claw (45) to separate from the differential housing.

2. The method of claim 1, wherein, The first passive component (8) includes a guide rod (31), a first ratchet disk (32) is fixedly connected to the surface of the guide rod (31), a third gear (33) is rotatably connected to one side of the first ratchet disk (32), the outer surface of the third gear (33) meshes with the inner surface of the internal gear plate (7), a guide plate (34) is slidably connected to the surface of the guide rod (31), and the plate body of the guide plate (34) contacts the transmission plate (21) and the second gear (22).

3. The method of claim 2, wherein the differential case is a ring gear differential case. The second passive component (9) includes a first rotating rod (35), on the surface of which a fourth gear (36) is fixedly connected.

4. The method of claim 3, wherein the differential case is a differential carrier. The third passive component (10) includes a second rotating rod (37), on the surface of which a second ratchet disc (38), a fifth gear (39), a sixth gear (40) and a seventh gear (41) are fixedly connected. An eighth gear (42) is rotatably connected to one side of the second ratchet disc (38), and the outer surface of the sixth gear (40) meshes with the outer surface of the fourth gear (36).

5. The method of claim 4, wherein the differential case is a ring gear case. The clamping assembly (13) includes a toothed plate (43), a connecting plate (44) is fixedly connected to one side of the toothed plate (43), a clamping claw (45) is fixedly connected to the side of the connecting plate (44) away from the toothed plate (43), the outer surface of the outer toothed plate (11) meshes with the outer surface of the transmission gear (12), and the outer surface of the transmission gear (12) contacts one side of the toothed plate (43).

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