Clamping device for bell housing machining

Abstract

The invention belongs to the technical field of part clamping devices, and particularly discloses a clamping device for bell housing machining, which comprises a first chuck mechanism, a second chuck mechanism, a bidirectional driving mechanism, a tensioning limiting assembly and a bottom plate, the first chuck mechanism is arranged on the bottom plate, the second chuck mechanism is arranged on the bottom plate, and the bidirectional driving mechanism is arranged on the bottom plate. The bidirectional driving mechanism is arranged between the first chuck mechanism and the second chuck mechanism, and the tensioning limiting assembly is arranged on the bottom plate. According to the technical scheme, the two sets of chucks are driven by the same driving mechanism, the structure can be simplified, the clamping pressure of the two sets of chucks can be automatically balanced, two clamping positions can be fully clamped, and the positive effect is achieved for workpiece fixing.

Description

Technical Field

[0001] The invention belongs to the technical field of parts clamping devices, and in particular relates to a clamping device for bell-shaped housing processing. Background Art

[0002] The ball cage is a part of the universal joint assembly. Because of its "bell-like" shape, it is also called a bell-shaped cover. It is a device used to wrap the ball head and connect the drive shaft. The bell-shaped cover is generally produced by turning or casting + finishing. Regardless of the method, the final finishing area is the inner wall of the bell-shaped cover. Since this part needs to cooperate with the ball head, it requires higher precision.

[0003] The bell-shaped jar is composed of a solid thin rod and a hollow thick rod. Since they are not long, the stability is not high when clamping any one of them. However, the traditional clamping mechanism does not have the function of clamping two parts with different diameters at the same time. If two independent chucks are used for clamping, not only the operation is cumbersome and the structure is complicated, but the clamping force of the two clamping parts is also likely to be unevenly distributed, resulting in the problem that the clamping force cannot be effectively applied at one position. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a clamping device that can drive two sets of chucks at the same time through a driving module, and can automatically complete the clamping and fixing of the shaft and the cover in sequence when the diameters of the shaft and the cover are unknown; The technical solution of driving the two sets of chucks through the same driving mechanism can not only simplify the structure, but also automatically balance the clamping pressure of the two sets of chucks, so that both clamping positions can be fully clamped, which has a positive effect on the fixation of the workpiece; not only that, because the driving module itself can move, no matter which chuck contacts the workpiece first, the driving mechanism can continue to tighten the other chuck, that is to say, the basis of the movement of the driving module is to be able to automatically and flexibly select between the two chucks.

[0005] Furthermore, the present invention also proposes a tensioning limit assembly, which provides a continuous contraction force to the wire through a torsion spring, thereby utilizing the wire for transmitting power and signals to achieve position maintenance of the driving motor in the initial state and automatic resetting after release.

[0006] The technical solution adopted by the present invention is as follows: The present invention proposes a clamping device for bell-shaped shell processing, including a first chuck mechanism, a second chuck mechanism, a bidirectional driving mechanism, a tensioning and limiting assembly and a base plate, wherein the first chuck mechanism is arranged on the base plate, the second chuck mechanism is arranged on the base plate, the bidirectional driving mechanism is arranged between the first chuck mechanism and the second chuck mechanism, the tensioning and limiting assembly is arranged on the base plate, and the ball cage body is composed of a shaft portion and a cover portion.

[0007] The shaft portion can be clamped and fixed by the first chuck mechanism, and the cover portion can be clamped and fixed by the second chuck mechanism. The clamping and fixing at two positions can ensure stable clamping of the ball cage body.

[0008] Furthermore, the first chuck mechanism includes a support column and a first chuck assembly, the support column is arranged on the base plate, and the first chuck assembly is arranged on the support column.

[0009] Preferably, the first chuck assembly includes a first chuck body, a first sliding jaw and a first driving turntable, the first chuck body is fixedly connected to a support column, the first chuck body is annularly evenly provided with a first slideway, the first sliding jaw is engaged and slidably arranged in the first slideway, the first driving turntable is rotatably arranged in the first chuck body, the first driving turntable is provided with a spirally outwardly extending thread groove, and the first sliding jaw is provided with a threaded boss that cooperates with the first driving turntable.

[0010] As a further preferred embodiment of the present invention, a first circular ring is provided on the first driving turntable, and the first gear ring is fixedly connected to the outside of the first circular ring.

[0011] Furthermore, the second chuck mechanism includes a support frame and a second chuck assembly, the support frame is arranged on the base plate, and the second chuck assembly is arranged on the support frame.

[0012] Preferably, the second chuck assembly includes a second chuck body, a second sliding jaw and a second driving turntable, the second chuck body is fixedly connected to the support frame, the second chuck body is annularly evenly provided with a second slideway, the second sliding jaw is engaged and slidably arranged in the second slideway, the second driving turntable is rotatably arranged in the second chuck body, the second driving turntable is provided with a spirally outwardly extending thread groove, and the second sliding jaw is provided with a threaded boss that cooperates with the second driving turntable.

[0013] As a further preferred embodiment of the present invention, a second circular ring is disposed on the second driving turntable, and the second gear ring is fixedly connected to the inside of the second circular ring.

[0014] The first chuck mechanism and the second chuck mechanism are both chuck structures, which are tightened and released by rotating the first drive turntable and the second drive turntable. Through the design of the thread direction on the first drive turntable and the second drive turntable, the first chuck mechanism and the second chuck mechanism can be tightened or released when the drive gear rotates.

[0015] Furthermore, the bidirectional driving mechanism includes a driving assembly and a rotating support assembly, the driving assembly is arranged on the rotating support assembly, and the rotating support assembly is arranged on the second chuck mechanism.

[0016] The bidirectional driving mechanism can not only drive the first chuck mechanism and the second chuck mechanism at the same time, but also ensure the pressure balance between the first chuck mechanism and the second chuck mechanism during the tightening process, thereby avoiding the problem of excessive pressure difference when the first chuck mechanism and the second chuck mechanism are independently controlled and one of the chucks is not stably clamped.

[0017] Preferably, the drive assembly comprises a first ring gear and a second ring gear, wherein the first ring gear is arranged on the first chuck mechanism, and the second ring gear is arranged on the second chuck mechanism.

[0018] As a further preferred embodiment of the present invention, the driving assembly also includes a driving motor and a driving gear, the driving motor is arranged on the rotating support assembly, the driving gear is fixedly connected to the output shaft of the driving motor, the driving gear and the first gear ring are meshed for transmission, the driving gear and the second gear ring are meshed for transmission, and the first gear ring and the second gear ring are coaxially arranged.

[0019] The driving gear is meshed with the first gear ring and the second gear ring at the same time. When the central axis position of the driving gear is fixed, the first gear ring and the second gear ring will rotate, and the first chuck mechanism and the second chuck mechanism will clamp or release synchronously. When the position of the first gear ring is fixed, the driving gear can still drive the second gear ring to rotate when the center position changes. When the position of the second gear ring is fixed, the driving gear can still drive the first gear ring to rotate when the center position changes. Through the above phenomenon, the first chuck mechanism and the second chuck mechanism can adapt to shafts and cover parts of different diameters. When one of the first chuck mechanism and the second chuck mechanism rests against the ball cage body, it can remain stationary, and the other will continue to tighten and clamp.

[0020] Preferably, the rotating support assembly includes a rotating bearing and a motor mounting ring, the rotating bearing is arranged on the second chuck mechanism, the motor mounting ring is fixedly connected to the outer ring of the rotating bearing, the motor mounting ring is provided with a motor mounting bracket, and the drive motor is arranged on the motor mounting bracket.

[0021] Furthermore, the tensioning limit assembly includes a fixed column, a reel, a torsion spring and a wire, the fixed column is arranged on the base plate, the reel is rotatably arranged on the fixed column, a torsion spring mounting plate is provided on the reel, one end of the torsion spring is arranged on the fixed column, the other end of the torsion spring is arranged on the torsion spring mounting plate, the wire is wound on the reel, and the end of the wire is arranged on the bidirectional drive mechanism.

[0022] The tensioning limit assembly can apply a pulling force toward the bidirectional drive mechanism through the wire used for power supply and signal transmission. On the one hand, it can make the drive gear rotate in place when the first chuck mechanism and the second chuck mechanism are not against the ball cage body. On the other hand, it can automatically reset the bidirectional drive mechanism when the ball cage body is released.

[0023] The beneficial effects achieved by the present invention using the above structure are as follows: (1) The shaft portion can be clamped and fixed by the first chuck mechanism, and the cover portion can be clamped and fixed by the second chuck mechanism. By clamping and fixing at two positions, the cage body can be stably clamped.

[0024] (2) Both the first chuck mechanism and the second chuck mechanism are chuck structures, and the first drive turntable and the second drive turntable are rotated to tighten and release the two. Through the design of the thread direction on the first drive turntable and the second drive turntable, the first chuck mechanism and the second chuck mechanism can be tightened or released when the driving gear rotates.

[0025] (3) The bidirectional driving mechanism can not only drive the first chuck mechanism and the second chuck mechanism at the same time, but also ensure the pressure balance between the first chuck mechanism and the second chuck mechanism during the tightening process, thereby avoiding the problem that the pressure difference is too large when the first chuck mechanism and the second chuck mechanism are independently controlled, and one of the chucks is not stably clamped.

[0026] (4) The technical solution of driving the two sets of chucks through the same driving mechanism can not only simplify the structure, but also automatically balance the clamping pressure of the two sets of chucks, so that both clamping positions can be fully clamped, which has a positive effect on the fixation of the workpiece.

[0027] (5) The tension limit assembly can apply a pulling force toward the bidirectional drive mechanism through the wire used for power supply and signal transmission. On the one hand, it can make the drive gear rotate in place when the first chuck mechanism and the second chuck mechanism are not against the ball cage body. On the other hand, it can automatically complete the resetting of the bidirectional drive mechanism when the ball cage body is released. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A three-dimensional diagram of a clamping device for bell-shaped housing processing proposed by the present invention; Figure 2 A front view of a clamping device for bell-shaped housing processing proposed by the present invention; Figure 3 A top view of a clamping device for bell-shaped housing processing proposed by the present invention; Figure 4 for Figure 2 A cross-sectional view along the cutting line AA; Figure 5 for Figure 4 A cross-sectional view along the cutting line BB; Figure 6 This is a schematic diagram of the exploded structure of a clamping device for bell-shaped housing processing proposed by the present invention; Figure 7 for Figure 5 A partial enlarged view of point Ⅰ in the middle; Figure 8 for Figure 5 A partial enlarged view of the middle II; Fig. 9 for Figure 6 A partial enlarged view of the middle part III; Fig.10 It is a schematic diagram of the movement direction of the driving gear, the first gear ring and the second gear ring in different states.

[0029] Among them, 1. the first chuck mechanism, 2. the second chuck mechanism, 3. the bidirectional driving mechanism, 4. the tensioning limit assembly, 5. the ball cage body, 6. the support column, 7. the first chuck assembly, 8. the first chuck body, 9. the first sliding jaw, 10. the first driving turntable, 11. the first slideway, 12. the first ring, 13. the support frame, 14. the second chuck assembly, 15. the second chuck body, 16. the second sliding jaw, 17. the second driving Turntable, 18, second slide, 19, second ring, 20, drive assembly, 21, rotation support assembly, 22, drive motor, 23, drive gear, 24, first gear ring, 25, second gear ring, 26, rotary bearing, 27, motor mounting ring, 28, motor mounting bracket, 29, fixed column, 30, reel, 31, torsion spring, 32, wire, 33, torsion spring mounting plate, 34, shaft, 35, cover, 36, bottom plate.

[0030] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it is necessary to understand that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0033] like Figure 1 to Figure 9As shown, the present invention proposes a clamping device for bell-shaped shell processing, including a first chuck mechanism 1, a second chuck mechanism 2, a bidirectional driving mechanism 3, a tensioning and limiting assembly 4 and a bottom plate 36. The first chuck mechanism 1 is arranged on the bottom plate 36, the second chuck mechanism 2 is arranged on the bottom plate 36, the bidirectional driving mechanism 3 is arranged between the first chuck mechanism 1 and the second chuck mechanism 2, the tensioning and limiting assembly 4 is arranged on the bottom plate 36, and the ball cage body 5 is composed of a shaft portion 34 and a cover portion 35.

[0034] The shaft portion 34 can be clamped and fixed by the first chuck mechanism 1 , and the cover portion 35 can be clamped and fixed by the second chuck mechanism 2 . By clamping and fixing at two positions, the cage body 5 can be stably clamped.

[0035] The first chuck mechanism 1 includes a support column 6 and a first chuck assembly 7 . The support column 6 is disposed on the base plate 36 , and the first chuck assembly 7 is disposed on the support column 6 .

[0036] The first chuck assembly 7 includes a first chuck body 8, a first sliding jaw 9 and a first driving turntable 10. The first chuck body 8 is fixedly connected to the support column 6. The first chuck body 8 is evenly distributed with a first slideway 11 in an annular manner. The first sliding jaw 9 is engaged and slidably arranged in the first slideway 11. The first driving turntable 10 is rotatably arranged in the first chuck body 8. The first driving turntable 10 is provided with a spirally outwardly extending threaded groove, and the first sliding jaw 9 is provided with a threaded boss that cooperates with the first driving turntable 10.

[0037] A first ring 12 is disposed on the first driving rotary plate 10 , and a first gear ring 24 is fixedly connected to the outside of the first ring 12 .

[0038] The second chuck mechanism 2 includes a support frame 13 and a second chuck assembly 14 . The support frame 13 is disposed on the bottom plate 36 , and the second chuck assembly 14 is disposed on the support frame 13 .

[0039] The second chuck assembly 14 includes a second chuck body 15, a second sliding jaw 16 and a second driving turntable 17. The second chuck body 15 is fixedly connected to the support frame 13. The second chuck body 15 is evenly distributed with second slideways 18 in an annular manner. The second sliding jaw 16 is slidably arranged in the second slideway 18. The second driving turntable 17 is rotatably arranged in the second chuck body 15. The second driving turntable 17 is provided with a spirally outwardly extending thread groove, and the second sliding jaw 16 is provided with a threaded boss that cooperates with the second driving turntable 17.

[0040] A second circular ring 19 is disposed on the second driving rotary disk 17 , and the second gear ring 25 is fixedly connected to the inside of the second circular ring 19 .

[0041] The first chuck mechanism 1 and the second chuck mechanism 2 are both chuck structures, which are tightened and released by rotating the first drive turntable 10 and the second drive turntable 17. Through the design of the thread direction on the first drive turntable 10 and the second drive turntable 17, the first chuck mechanism 1 and the second chuck mechanism 2 can be tightened or released when the drive gear 23 rotates.

[0042] The bidirectional driving mechanism 3 includes a driving assembly 20 and a rotating support assembly 21 . The driving assembly 20 is disposed on the rotating support assembly 21 , and the rotating support assembly 21 is disposed on the second chuck mechanism 2 .

[0043] The bidirectional driving mechanism 3 can not only drive the first chuck mechanism 1 and the second chuck mechanism 2 at the same time, but also ensure the pressure balance between the first chuck mechanism 1 and the second chuck mechanism 2 during the tightening process, thereby avoiding the problem of excessive pressure difference when the first chuck mechanism 1 and the second chuck mechanism 2 are independently controlled and one of the chucks is not stably clamped.

[0044] The driving assembly 20 includes a first ring gear 24 and a second ring gear 25 . The first ring gear 24 is disposed on the first chuck mechanism 1 , and the second ring gear 25 is disposed on the second chuck mechanism 2 .

[0045] The driving assembly 20 also includes a driving motor 22 and a driving gear 23. The driving motor 22 is arranged on the rotating support assembly 21. The driving gear 23 is fixedly connected to the output shaft of the driving motor 22. The driving gear 23 and the first ring gear 24 are meshed for transmission. The driving gear 23 and the second ring gear 25 are meshed for transmission. The first ring gear 24 and the second ring gear 25 are coaxially arranged.

[0046] The driving gear 23 is meshed with the first gear ring 24 and the second gear ring 25 at the same time. When the central axis position of the driving gear 23 is fixed, the first gear ring 24 and the second gear ring 25 will rotate, and the first chuck mechanism 1 and the second chuck mechanism 2 will be clamped or released synchronously. When the position of the first gear ring 24 is fixed, the driving gear 23 can still drive the second gear ring 25 to rotate when the center position changes. When the position of the second gear ring 25 is fixed, the driving gear 23 can still drive the first gear ring 24 to rotate when the center position changes. Through the above phenomenon, the first chuck mechanism 1 and the second chuck mechanism 2 can adapt to shafts 34 and cover parts 35 of different diameters. When one of the first chuck mechanism 1 and the second chuck mechanism 2 abuts against the ball cage body 5, it can remain stationary, and the other will continue to tighten and clamp.

[0047] The rotating support assembly 21 includes a rotating bearing 26 and a motor mounting ring 27. The rotating bearing 26 is arranged on the second chuck mechanism 2. The motor mounting ring 27 is fixed to the outer ring of the rotating bearing 26. The motor mounting ring 27 is provided with a motor mounting bracket 28. The driving motor 22 is arranged on the motor mounting bracket 28.

[0048] The tensioning limit assembly 4 includes a fixed column 29, a reel 30, a torsion spring 31 and a wire 32. The fixed column 29 is arranged on the bottom plate 36. The reel 30 is rotatably arranged on the fixed column 29. The reel 30 is provided with a mounting plate 33 for the torsion spring 31. One end of the torsion spring 31 is arranged on the fixed column 29, and the other end of the torsion spring 31 is arranged on the mounting plate 33 for the torsion spring 31. The wire 32 is wound on the reel 30, and the end of the wire 32 is arranged on the bidirectional driving mechanism 3.

[0049] The tensioning limit assembly 4 can apply a pulling force toward the bidirectional drive mechanism 3 through the wire 32 used for power supply and signal transmission. On the one hand, it can make the driving gear 23 rotate in place when the first chuck mechanism 1 and the second chuck mechanism 2 are not against the ball cage body 5. On the other hand, it can automatically complete the resetting of the bidirectional drive mechanism 3 when the ball cage body 5 is released.

[0050] like Fig.10 As shown, three dotted circles represent the driving gear 23, the first gear ring 24 and the second gear ring 25, respectively, wherein the outer circle represents the second gear ring 25, the inner circle represents the first gear ring 24, the circle between the first gear ring 24 and the second gear ring 25 represents the driving gear 23, and the arrows represent the rotation directions of the driving gear 23, the first gear ring 24 and the second gear ring 25, and the revolution direction of the driving gear 23, respectively; a represents the state when the first chuck mechanism 1 and the second chuck mechanism 2 are both in contact with the ball cage body 5, at which time the driving gear 23 rotates in place, the first gear ring 24 and the second gear ring 25 rotate under the drive of the driving gear 23, and at which time the first sliding jaw 9 and the second sliding jaw 16 continue to approach the support column 6; b represents the state where the first chuck mechanism 1 has abutted against the shaft portion 34 and the second chuck mechanism 2 has not abutted against the cover portion 35. At this time, the first gear ring 24 is stationary, and the driving gear 23 continues to rotate and revolves around the first gear ring 24, while the second gear ring 25 is tightened at a faster speed; c represents the state where the second chuck mechanism 2 has abutted against the cover portion 35 and the first chuck mechanism 1 has not abutted against the shaft portion 34. At this time, the second gear ring 25 is stationary, and the driving gear 23 continues to rotate and revolves around the second gear ring 25. At the same time, the first gear ring 24 is tightened at a faster speed; No matter which of the first chuck mechanism 1 and the second chuck mechanism 2 is abutted to complete the clamping first, the other one will continue to tighten until the clamping is also completed, at which time the driving gear 23, the first gear ring 24 and the second gear ring 25 can no longer rotate.

[0051] When in use, the user first places the ball cage body 5 in the first chuck mechanism 1 and the second chuck mechanism 2, and then starts the drive motor 22. In the initial state, since the first chuck mechanism 1 and the second chuck mechanism 2 are not in contact with the ball cage body 5, and at this time, under the action of the tension of the wire 32, the bidirectional drive mechanism 3 will not rotate around the ball cage body 5, and the drive gear 23 rotates in place, and the first gear ring 24 and the second gear ring 25 rotate respectively under the drive of the drive gear 23; When the first gear ring 24 rotates with the first driving turntable 10 through the first ring 12, each first sliding jaw 9 synchronously approaches the shaft portion 34. When the second gear ring 25 rotates with the second driving turntable 17 through the second ring 19, each second sliding jaw 16 synchronously approaches the cover portion 35.

[0052] Since the diameters of the shaft portion 34 and the cover portion 35 are unknown, it is possible that the first chuck mechanism 1 first abuts against the shaft portion 34 , or it is possible that the second chuck mechanism 2 first abuts against the cover portion 35 ; When the first chuck mechanism 1 has abutted against the shaft 34 and the second chuck mechanism 2 has not abutted against the cover 35, the first gear ring 24 is stationary, and the driving gear 23 continues to rotate and revolves around the first gear ring 24, while the second gear ring 25 is tightened at a faster speed. At this time, the wire 32 pulls the reel 30 to rotate, and the torsion spring 31 stores elastic potential energy through its own deformation; When the second chuck mechanism 2 has abutted against the cover portion 35 and the first chuck mechanism 1 has not yet abutted against the shaft portion 34, the second ring gear 25 is stationary, and the driving gear 23 will continue to rotate and revolve around the second ring gear 25. At the same time, the first ring gear 24 will be tightened at a faster speed. At this time, the wire 32 pulls the reel 30 to rotate, and the torsion spring 31 stores elastic potential energy through its own deformation.

[0053] No matter which of the first chuck mechanism 1 and the second chuck mechanism 2 is abutted to complete the clamping first, the other one will continue to tighten until the clamping is also completed, at which time the driving gear 23, the first gear ring 24 and the second gear ring 25 can no longer rotate.

[0054] To unlock, it is only necessary to rotate the drive motor 22 in the opposite direction. Three unlocking sequences may occur: The first one is that the first chuck mechanism 1 and the second chuck mechanism 2 leave the cage body 5 at the same time and are unlocked at the same time; The second method is that the first chuck mechanism 1 leaves the ball cage body 5 first, and when the first chuck mechanism 1 is completely unlocked until the first driving turntable 10 cannot rotate, the second chuck mechanism 2 is unlocked; The third method is that the second chuck mechanism 2 leaves the ball cage body 5 first, and when the second chuck mechanism 2 is completely unlocked until the first driving turntable 10 cannot rotate, the first chuck mechanism 1 is unlocked again.

[0055] After the first chuck mechanism 1 and the second chuck mechanism 2 are unlocked, the drive motor 22 will also be reset to the position closest to the tensioning and limiting assembly 4 under the pulling force of the wire 32 .

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A clamping device for bell-shaped housing processing, wherein the cage body (5) is composed of a shaft portion (34) and a cover portion (35), characterized in that: The invention comprises a first chuck mechanism (1), a second chuck mechanism (2), a bidirectional driving mechanism (3), a tensioning and limiting assembly (4) and a bottom plate (36), wherein the first chuck mechanism (1) is arranged on the bottom plate (36), the second chuck mechanism (2) is arranged on the bottom plate (36), the bidirectional driving mechanism (3) is arranged between the first chuck mechanism (1) and the second chuck mechanism (2), and the tensioning and limiting assembly (4) is arranged on the bottom plate (36); The bidirectional driving mechanism (3) comprises a driving assembly (20) and a rotating support assembly (21), wherein the driving assembly (20) is arranged on the rotating support assembly (21), and the rotating support assembly (21) is arranged on the second chuck mechanism (2); The driving assembly (20) comprises a first gear ring (24) and a second gear ring (25); the first gear ring (24) is arranged on the first chuck mechanism (1), and the second gear ring (25) is arranged on the second chuck mechanism (2).

2. A clamping device for bell housing processing according to claim 1, characterized in that: The driving assembly (20) further comprises a driving motor (22) and a driving gear (23); the driving motor (22) is arranged on the rotating support assembly (21); the driving gear (23) is fixedly connected to the output shaft of the driving motor (22); the driving gear (23) and the first gear ring (24) are meshed for transmission; the driving gear (23) and the second gear ring (25) are meshed for transmission; the first gear ring (24) and the second gear ring (25) are coaxially arranged.

3. A clamping device for bell housing processing according to claim 2, characterized in that: The rotary support assembly (21) comprises a rotary bearing (26) and a motor mounting collar (27); the rotary bearing (26) is arranged on the second chuck mechanism (2); the motor mounting collar (27) is fixedly connected to the outer ring of the rotary bearing (26); a motor mounting bracket (28) is arranged on the motor mounting collar (27); and the drive motor (22) is arranged on the motor mounting bracket (28).

4. A clamping device for bell housing processing according to claim 3, characterized in that: The first chuck mechanism (1) comprises a support column (6) and a first chuck assembly (7); the support column (6) is arranged on a base plate (36); and the first chuck assembly (7) is arranged on the support column (6).

5. A clamping device for bell housing processing according to claim 4, characterized in that: The first chuck assembly (7) comprises a first chuck body (8), a first sliding jaw (9) and a first driving turntable (10); the first chuck body (8) is fixedly connected to a support column (6); a first slideway (11) is evenly distributed in an annular shape on the first chuck body (8); the first sliding jaw (9) is slidably engaged in the first slideway (11); the first driving turntable (10) is rotatably arranged in the first chuck body (8); a spirally outwardly extending thread groove is provided on the first driving turntable (10); and a threaded boss cooperating with the first driving turntable (10) is provided on the first sliding jaw (9).

6. A clamping device for bell housing processing according to claim 5, characterized in that: A first circular ring (12) is provided on the first driving rotary disk (10), and the first gear ring (24) is fixedly connected to the outside of the first circular ring (12).

7. A clamping device for bell housing processing according to claim 6, characterized in that: The second chuck mechanism (2) comprises a support frame (13) and a second chuck assembly (14); the support frame (13) is arranged on a base plate (36), and the second chuck assembly (14) is arranged on the support frame (13).

8. The clamping device for bell housing processing according to claim 7, characterized in that: The second chuck assembly (14) comprises a second chuck body (15), a second sliding jaw (16) and a second driving turntable (17); the second chuck body (15) is fixedly connected to the support frame (13); a second slideway (18) is evenly distributed in an annular shape on the second chuck body (15); the second sliding jaw (16) is slidably engaged in the second slideway (18); the second driving turntable (17) is rotatably arranged in the second chuck body (15); a thread groove extending spirally outward is provided on the second driving turntable (17); and a threaded boss cooperating with the second driving turntable (17) is provided on the second sliding jaw (16).

9. A clamping device for bell housing processing according to claim 8, characterized in that: The second driving rotary disk (17) is provided with a second circular ring (19), and the second gear ring (25) is fixedly connected to the interior of the second circular ring (19).

10. The clamping device for bell housing processing according to claim 1, characterized in that: The tensioning and limiting assembly (4) comprises a fixed column (29), a reel (30), a torsion spring (31) and a wire (32); the fixed column (29) is arranged on a bottom plate (36); the reel (30) is rotatably arranged on the fixed column (29); a torsion spring (31) mounting plate (33) is provided on the reel (30); one end of the torsion spring (31) is arranged on the fixed column (29); the other end of the torsion spring (31) is arranged on the torsion spring (31) mounting plate (33); the wire (32) is wound on the reel (30); and the end of the wire (32) is arranged on the bidirectional driving mechanism (3).

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