A self-centering clamping mechanism

Abstract

The present invention discloses a self-centering clamping mechanism, which includes a mounting base substrate, a clamp, a first slide rail, a first slider, a first sliding groove, a second slide rail, a second slider, a second sliding groove, a third slide rail, a third slider, a third sliding groove, a fourth slide rail, a fourth slider, a fourth sliding groove, a first sliding stop, a first buffer, a second sliding stop, a second buffer, a third sliding stop, a third buffer, a fourth sliding stop, a fourth buffer and a self-centering disc. In the present invention, a self-centering disc and a clamp are provided on the front side of the mounting base substrate, and the first buffer, the second buffer, the third buffer and the fourth buffer cooperate with the first sliding stop, the second sliding stop, the third sliding stop and the fourth sliding stop to enable the self-centering disc to automatically adjust the plug and the long tube to be coaxial when they are not coaxial during use and then tighten them, avoiding situations such as insufficient fastening or even damage at the connection of the plug or the long tube.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe part assembly, and particularly relates to a self-centering clamping mechanism. Background Art

[0002] In industrial products, the threaded connection between pipes and plugs is usually tightened manually. For existing long pipes, due to their large diameter, long length, and relatively heavy weight, it requires multiple operators to tighten the plugs. Such operation is inconvenient, requires a large number of personnel, and has a high cost. Therefore, a lathe is used to assist in tightening the plugs. That is, the plug is first manually pre-tightened onto the long pipe, and then moved to the lathe by a transport vehicle. That is, the long pipe is adjusted to be on the same horizontal line as the chuck of the lathe, and then the long pipe is fixed on the chuck of the lathe. Then the lathe is started to work, and the long pipe and the plug are tightened by the rotation of the chuck. Such operation can save the number of personnel and reduce costs. However, in actual operation, it is very difficult to adjust the long pipe to be on the same horizontal line as the plug. When the plug and the long pipe are tightened under the condition of different axes, it will cause the connection at the joint of the plug and the long pipe to be not firm enough, or even damage.

[0003] Therefore, improvements must be made to the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a self-centering clamping mechanism, which solves the problems that the connection at the joint of the plug and the long pipe is not firm enough or even damaged.

[0005] To solve the above technical problems, the technical solution of the present invention is as follows:

[0006] A self-centering clamping mechanism includes a mounting base substrate and a clamp. The mounting base substrate is a circular plate. At the upper end of the front face of the mounting base substrate, there is a horizontally arranged first slide rail. A first slider is provided on the first slide rail. Inside the first slide rail, there is a first sliding groove that penetrates the mounting base substrate from front to back. At the right end of the front face of the mounting base substrate, there is a vertically arranged second slide rail. A second slider is provided on the second slide rail. Inside the second slide rail, there is a second sliding groove that penetrates the mounting base substrate from front to back. At the lower end of the front face of the mounting base substrate, there is a horizontally arranged third slide rail. A third slider is provided on the third slide rail. Inside the third slide rail, there is a third sliding groove that penetrates the mounting base substrate from front to back. At the left end of the front face of the mounting base substrate, there is a vertically arranged fourth slide rail. A fourth slider is provided on the fourth slide rail. Inside the fourth slide rail, there is a fourth sliding groove that penetrates the mounting base substrate from front to back. A first sliding stop is provided on the first slider. One end of the first sliding stop is fixed to the first slider, and the other end of the first sliding stop penetrates the first sliding groove and extends to the rear side of the mounting base substrate. At the left and right ends at the rear side of the first sliding groove, there are first buffers that cooperate with the first sliding stop. A second sliding stop is provided on the second slider. One end of the second sliding stop is fixed to the second slider, and the other end of the second sliding stop penetrates the second sliding groove and extends to the rear side of the mounting base substrate. At the upper and lower ends at the rear side of the second sliding groove, there are second buffers that cooperate with the second sliding stop. A third sliding stop is provided on the third slider. One end of the third sliding stop is fixed to the third slider, and the other end of the third sliding stop penetrates the third sliding groove and extends to the rear side of the mounting base substrate. At the left and right ends at the rear side of the third sliding groove, there are third buffers that cooperate with the third sliding stop. A fourth sliding stop is provided on the fourth slider. One end of the fourth sliding stop is fixed to the fourth slider, and the other end of the fourth sliding stop penetrates the fourth sliding groove and extends to the rear side of the mounting base substrate. At the upper and lower ends at the rear side of the fourth sliding groove, there are fourth buffers that cooperate with the fourth sliding stop. A self-centering disk and a clamp are provided on the front side of the mounting base substrate. The self-centering disk includes a ring. At the upper right end of the ring, there is a first rolling plate. At the upper right end of the ring, there is a second rolling plate. At the lower right end of the ring, there is a third rolling plate. At the lower left end of the ring, there is a fourth rolling plate. On the left and right sides at the upper end of the first rolling plate, there are first rolling bearings that contact the first rolling plate. On the upper and lower sides at the right end of the second rolling plate, there are second rolling bearings that contact the second rolling plate. On the left and right sides at the lower end of the third rolling plate, there are third rolling bearings that contact the third rolling plate. On the upper and lower sides at the left end of the fourth rolling plate, there are fourth rolling bearings that contact the fourth rolling plate. The first rolling bearing is connected to the first sliding stop through a first rolling bearing seat.The second rolling bearing is connected to the second sliding flap through a second rolling bearing seat, the third rolling bearing is connected to the third sliding flap through a third rolling bearing seat, the fourth rolling bearing is connected to the fourth sliding flap through a fourth rolling bearing seat, and the clamp is arranged in front of the ring.

[0007] Further, a first slide rail installation groove for installing the first slide rail is provided on the front end face of the mounting base substrate, a second slide rail installation groove for installing the second slide rail is provided on the front end face of the mounting base substrate, a third slide rail installation groove for installing the third slide rail is provided on the front end face of the mounting base substrate, and a fourth slide rail installation groove for installing the fourth slide rail is provided on the front end face of the mounting base substrate.

[0008] Further, the first sliding flap, the second sliding flap, the third sliding flap, and the fourth sliding flap are all right-angled flaps.

[0009] Further, a slip ring seat for mating connection with a lathe is provided in the middle of the rear end face of the mounting base substrate.

[0010] Further, the first rolling plate, the second rolling plate, the third rolling plate, and the fourth rolling plate are arranged in a circumferential array centered on the ring.

[0011] Further, the clamp includes a left connecting plate and a right connecting plate. A left semi-circular groove is provided on the right end face of the left connecting plate, and a right semi-circular groove mating with the left semi-circular groove is provided on the left end face of the right connecting plate. The left semi-circular groove and the right semi-circular groove form a clamping groove. The upper end of the left connecting plate is hinged to the ring through a first hinge shaft, and the right connecting plate is hinged to the ring through a second hinge shaft. The rear ends of the first hinge shaft and the second hinge shaft both extend between the ring and the mounting base substrate. A first push cylinder and a second push cylinder are provided between the ring and the mounting base substrate. The rear end of the first hinge shaft is fixedly connected to a first connecting rod. One end of the first connecting rod is fixedly connected to the rear end of the first hinge shaft, and the other end of the first connecting rod is hinged to the cylinder rod of the first push cylinder. The rear end of the second hinge shaft is fixedly connected to a second connecting rod. One end of the second connecting rod is fixedly connected to the rear end of the second hinge shaft, and the other end of the second connecting rod is hinged to the cylinder rod of the second push cylinder.

[0012] Further, a first inclined plate connected to the ring is provided between the third rolling plate and the fourth rolling plate, and a second inclined plate connected to the ring is provided between the first rolling plate and the second rolling plate. The inclination angles of the first inclined plate and the second inclined plate are both 45 degrees. The first pushing cylinder is connected to the lower end of the first inclined plate through a first cylinder mounting seat, and the second pushing cylinder is connected to the upper end of the second inclined plate through a second cylinder mounting seat.

[0013] Further, a first polyurethane gasket is provided in the left semi-circular groove, and a second polyurethane gasket is provided in the right semi-circular groove.

[0014] Further, a first jaw spring seat is provided at the upper left end of the left connecting plate, and a second jaw spring seat is provided at the lower right end of the right connecting plate. A first return spring groove is provided on the right end face of the first jaw spring seat, and a first return spring is provided in the first return spring groove. One end of the first return spring is arranged in the first return spring groove, and the other end of the first return spring penetrates through the left connecting plate and abuts against the right connecting plate. A second return spring groove is provided on the left end face of the second jaw spring seat, and a second return spring is provided in the second return spring groove. One end of the second return spring is arranged in the second return spring groove, and the other end of the second return spring penetrates through the right connecting plate and abuts against the left connecting plate.

[0015] Further, a first hinge shaft positioning plate is fixed on the first rolling plate, and a second hinge shaft positioning plate is fixed on the third rolling plate. Both the first hinge shaft positioning plate and the second hinge shaft positioning plate are in a "z" shape. One end of the first hinge shaft positioning plate is fixed on the first rolling plate, and the other end of the first hinge shaft positioning plate is arranged above the left connecting plate. A first round hole is provided at the upper end of the first hinge shaft positioning plate, and a first auxiliary bearing matching the first hinge shaft is provided in the first round hole. One end of the second hinge shaft positioning plate is fixed on the third rolling plate, and the other end of the second hinge shaft positioning plate is arranged above the right connecting plate. A second round hole is provided at the upper end of the second hinge shaft positioning plate, and a second auxiliary bearing matching the second hinge shaft is provided in the second round hole.

[0016] Advantages of the present invention:

[0017] With the above technical solution, since a self-centering disc and a clamp are provided on the front side of the mounting base substrate, the first buffer, the second buffer, the third buffer and the fourth buffer cooperate with the first sliding stop, the second sliding stop, the third sliding stop and the fourth sliding stop to enable the self-centering disc to automatically adjust the plug and the long tube to be coaxial when they are not coaxial during use and then tighten them, avoiding situations such as insufficient fastening or even damage at the connection of the plug or the long tube. Description of the Drawings

[0018] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of a self-centering clamping mechanism of the present invention Figure 1 ;

[0019] Figure 2 Schematic diagram of the three-dimensional structure of an embodiment of a self-centering clamping mechanism of the present invention Figure 2 ;

[0020] Figure 3 Schematic diagram of the three-dimensional structure of an embodiment of a self-centering clamping mechanism of the present invention Figure 3 ;

[0021] Figure 4 Schematic diagram of the front view structure of an embodiment of a self-centering clamping mechanism of the present invention.

[0022] Reference numerals of the drawings and their descriptions:

[0023] 1. Mounting base substrate; 2. First connecting rod; 3. First sliding groove; 4. First sliding stop; 5. First rolling bearing seat; 6. First slide rail; 7. First slider; 8. First rolling bearing; 9. First rolling plate; 10. Second cylinder; 11. Second cylinder mounting seat; 12. First inclined plate; 13. First hinge shaft positioning plate; 14. Second rolling bearing seat; 15. Second rolling bearing; 16. Second rolling plate; 17. First auxiliary bearing; 18. Second jaw spring seat; 19. Second polyurethane gasket; 20. Right connecting plate; 21. Second auxiliary bearing; 22. First polyurethane gasket; 23. Second hinge shaft positioning plate; 24. Left connecting plate; 25. Third rolling plate; 26. Second rolling bearing; 27. Second rolling bearing seat; 28. Second inclined plate; 29. First cylinder mounting seat; 30. First cylinder; 31. Ring; 32. Fourth rolling plate; 33. Fourth sliding stop; 34. Fourth rolling bearing; 35. Fourth slider; 36. Fourth slide rail; 37. Fourth rolling bearing seat; 38. First jaw spring seat; 39. First buffer; 40. Second buffer; 41. Slip ring seat; 42. Third buffer; 43. Fourth buffer; 44. Second sliding stop; 45. Second slider; 46. Second slide rail; 47. Second connecting rod; 48. Third slide rail; 49. Third slider; 50. Third sliding stop. Detailed implementation manners

[0024] The following further describes the detailed implementation manners of the present invention with reference to the drawings. It should be noted here that the descriptions of these implementation manners are used to help understand the present invention, but do not limit the present invention. In addition, the technical features involved in the various implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Refer to Figures 1 to 4, a self-centering clamping mechanism provided by the present invention includes a mounting base substrate 1 and a clamp. The mounting base substrate 1 is a circular plate. At the upper end of the front surface of the mounting base substrate 1, there is a horizontally arranged first slide rail 6. A first slider 7 is provided on the first slide rail 6. Inside the first slide rail 6, there is a first sliding groove 3 that penetrates the mounting base substrate 1 from front to back. At the right end of the front surface of the mounting base substrate 1, there is a vertically arranged second slide rail 46. A second slider 45 is provided on the second slide rail 46. Inside the second slide rail 46, there is a second sliding groove that penetrates the mounting base substrate 1 from front to back. At the lower end of the front surface of the mounting base substrate 1, there is a horizontally arranged third slide rail 48. A third slider 49 is provided on the third slide rail 48. Inside the third slide rail 48, there is a third sliding groove that penetrates the mounting base substrate 1 from front to back. At the left end of the front surface of the mounting base substrate 1, there is a vertically arranged fourth slide rail 36. A fourth slider 35 is provided on the fourth slide rail 36. Inside the fourth slide rail 36, there is a fourth sliding groove that penetrates the mounting base substrate 1 from front to back. A first sliding stop 4 is provided on the first slider 7. One end of the first sliding stop 4 is fixed on the first slider 7, and the other end of the first sliding stop 4 penetrates the first sliding groove 3 and extends to the rear side of the mounting base substrate 1. At the left and right ends of the rear side of the first sliding groove 3, there are first buffers 39 that cooperate with the first sliding stop 4. A second sliding stop 44 is provided on the second slider 45. One end of the second sliding stop 44 is fixed on the second slider 45, and the other end of the second sliding stop 44 penetrates the second sliding groove and extends to the rear side of the mounting base substrate 1. At the upper and lower ends of the rear side of the second sliding groove, there are second buffers 40 that cooperate with the second sliding stop 44. A third sliding stop 50 is provided on the third slider 49. One end of the third sliding stop 50 is fixed on the third slider 49, and the other end of the third sliding stop 50 penetrates the third sliding groove and extends to the rear side of the mounting base substrate 1. At the left and right ends of the rear side of the third sliding groove, there are third buffers 42 that cooperate with the third sliding stop 50. A fourth sliding stop 33 is provided on the fourth slider 35. One end of the fourth sliding stop 33 is fixed on the fourth slider 35, and the other end of the fourth sliding stop 33 penetrates the fourth sliding groove and extends to the rear side of the mounting base substrate 1. At the upper and lower ends of the rear side of the fourth sliding groove, there are fourth buffers 43 that cooperate with the fourth sliding stop 33. A self-centering disk is provided on the front side of the mounting base substrate 1. The self-centering disk includes a ring 31. At the upper right end of the ring 31, there is a first rolling plate 9. At the upper right end of the ring 31, there is a second rolling plate 16. At the lower right end of the ring 31, there is a third rolling plate 25. At the lower left end of the ring 31, there is a fourth rolling plate 32. On the left and right sides of the upper end of the first rolling plate 9, there are first rolling bearings 8 that contact the first rolling plate 9.On both the upper and lower sides of the right end of the second rolling plate 16, there are second rolling bearings 15 in contact with the second rolling plate 16. On both the left and right sides of the lower end of the third rolling plate 25, there are third rolling bearings 26 in contact with the third rolling plate 25. On both the upper and lower sides of the left end of the fourth rolling plate 32, there are fourth rolling bearings 34 in contact with the fourth rolling plate 32. The first rolling bearing 8 is connected to the first sliding stop 4 through the first rolling bearing seat 5. The second rolling bearing 15 is connected to the second sliding stop 44 through the second rolling bearing seat 14. The third rolling bearing 26 is connected to the third sliding stop 50 through the third rolling bearing seat 27. The fourth rolling bearing 34 is connected to the fourth sliding stop 33 through the fourth rolling bearing seat 37. The clamp is arranged in front of the ring 31.,

[0026] In this technical solution, a self-centering disc and a clamp are provided on the front side of the mounting base substrate 1. The first buffer 39, the second buffer 40, the third buffer 42, and the fourth buffer 43 cooperate with the first sliding stop 4, the second sliding stop 44, the third sliding stop 50, and the fourth sliding stop 33 to automatically adjust the plug and the long pipe to the same axis when they are not coaxial during the use of the self-centering disc, and then tighten them, avoiding situations such as insufficient tightness or even damage at the connection of the plug or the long pipe.,

[0027] During the use process, the first buffer 39, the second buffer 40, the third buffer 42, and the fourth buffer 43 can automatically adjust the floating to absorb the eccentric force, and then automatically adjust the non-coaxiality of the long pipe and the plug to the same axis. When the transport vehicle moves the manually pre-tightened long pipe and plug to the chuck for installation, the transport vehicle needs to adjust the height of the long pipe and the plug to the chuck position. The transport vehicle does not move, and the chuck of the lathe rotates to realize the threaded rotation connection between the plug and the long pipe. Since there is also a deviation in this height during actual operation, at this time, the self-centering disc of the technical solution automatically adjusts the long pipe and the plug to the same axis, so that there will be no situations such as not being tightened, not being screwed on, and being damaged when the plug and the long pipe are rotationally connected. This technical solution can be used in various occasions. For example, in the connection between a pipe with a diameter of 100 mm and a length of 6 m and a plug, this technical solution can also be used for threaded connectors with large torque, etc.,

[0028] For example, in some embodiments, a first slide rail mounting groove for mounting the first slide rail 6 is provided on the front end face of the mounting base substrate 1, a second slide rail mounting groove for mounting the second slide rail 46 is provided on the front end face of the mounting base substrate 1, a third slide rail mounting groove for mounting the third slide rail 48 is provided on the front end face of the mounting base substrate 1, and a fourth slide rail mounting groove for mounting the fourth slide rail 36 is provided on the front end face of the mounting base substrate 1. The first slide rail 6, the second slide rail 46, the third slide rail 48, and the fourth slide rail 36 are first placed corresponding to the first slide rail mounting groove, the second slide rail mounting groove, the third slide rail mounting groove, and the fourth slide rail mounting groove respectively, and then tightened to the mounting base substrate 1 by bolts, which is convenient for positioning and installation and is more stable.

[0029] For example, in some embodiments, the first sliding flap 4, the second sliding flap 44, the third sliding flap 50, and the fourth sliding flap 33 are all right-angled flaps. This facilitates the fixation of the first sliding flap 4, the second sliding flap 44, the third sliding flap 50, and the fourth sliding flap 33 and the installation of each rolling bearing seat.

[0030] The first sliding flap 4, the second sliding flap 44, the third sliding flap 50, and the fourth sliding flap 33 all have the same structure, and the corresponding sliding grooves, rolling bearings, and rolling plates are all of the same structure. Such a design can save the manufacturing cost of product components and improve the service performance of the clamping mechanism by ensuring that the moving positions in all directions can remain the same.

[0031] For example, in some embodiments, a slip ring seat 41 for mating connection with a lathe is provided in the middle of the rear end face of the mounting base substrate 1. A plurality of bolt holes are evenly distributed on the slip ring seat 41, which is convenient for installation.

[0032] For example, in some embodiments, the first rolling plate 9, the second rolling plate 16, the third rolling plate 25, and the fourth rolling plate 32 are arranged in a circumferential array centered on the circular ring 31. This can better automatically adjust the long tube and the plug to be on the same axis.

[0033] For example, in some embodiments, the clamp includes a left connecting plate 24 and a right connecting plate 20. The right end face of the left connecting plate 24 is provided with a left semi-circular groove, and the left end face of the right connecting plate 20 is provided with a right semi-circular groove that matches the left semi-circular groove. The left semi-circular groove and the right semi-circular groove form a clamping groove. The upper end of the left connecting plate 24 is hinged to the ring 31 through a first hinge shaft, and the right connecting plate 20 is hinged to the ring 31 through a second hinge shaft. The rear ends of the first hinge shaft and the second hinge shaft both extend between the ring and the mounting base substrate. A first pushing cylinder 30 and a second pushing cylinder 10 are provided between the ring 31 and the mounting base substrate 1. The rear end of the first hinge shaft is fixedly connected to a first connecting rod 2. One end of the first connecting rod 2 is fixedly connected to the rear end of the first hinge shaft, and the other end of the first connecting rod 2 is hinged to the cylinder rod of the first pushing cylinder 30. The rear end of the second hinge shaft is fixedly connected to a second connecting rod 47. One end of the second connecting rod 47 is fixedly connected to the rear end of the second hinge shaft, and the other end of the second connecting rod 47 is hinged to the cylinder rod of the second pushing cylinder 10. The first pushing cylinder 30 and the second pushing cylinder 10 are used to push the left connecting plate 24 and the right connecting plate 10 to open and close for clamping the pipe fittings. Such a setting can be suitable for clamping pipe fittings of various different pipe diameters, improving the service performance.

[0034] For example, in some embodiments, a first inclined plate 12 connected to the ring 31 is provided between the third rolling plate 25 and the fourth rolling plate 32, and a second inclined plate 28 connected to the ring 31 is provided between the first rolling plate 9 and the second rolling plate 16. The inclination angles of the first inclined plate 12 and the second inclined plate 28 are both 45 degrees. The first pushing cylinder 30 is connected to the lower end of the first inclined plate 12 through a first cylinder mounting seat 29, and the second pushing cylinder 10 is connected to the upper end of the second inclined plate 28 through a second cylinder mounting seat 11. A plurality of mounting holes are provided on both the first inclined plate 12 and the second inclined plate 28, which facilitates the installation of the first pushing cylinder 30 and the second pushing cylinder 10.

[0035] The ring 31, the first rolling plate 9, the second rolling plate 16, the third rolling plate 25, the fourth rolling plate 32, the first inclined plate 12 and the second inclined plate 28 are integrally formed, which can make the structure more stable and also reduce the workpiece assembly process.

[0036] For example, in some embodiments, a first polyurethane gasket 22 is provided in the left semi-circular groove, and a second polyurethane gasket 19 is provided in the right semi-circular groove. The polyurethane gasket has good strength, shock absorption, wear resistance and oil resistance, can protect the pipe fittings, and has a long service life.

[0037] For example, in some embodiments, a first jaw spring seat 38 is provided at the upper left end of the left connecting plate 24, and a second jaw spring seat 18 is provided at the lower right end of the right connecting plate 20. A first return spring groove is provided on the right end face of the first jaw spring seat 38, and a first return spring is provided in the first return spring groove. One end of the first return spring is arranged in the first return spring groove, and the other end of the first return spring penetrates through the left connecting plate 24 and abuts against the right connecting plate 20. A second return spring groove is provided on the left end face of the second jaw spring seat 18, and a second return spring is provided in the second return spring groove. One end of the second return spring is arranged in the second return spring groove, and the other end of the second return spring penetrates through the right connecting plate 20 and abuts against the left connecting plate 24. The first jaw spring seat 38 and the second jaw spring seat 18 enable the left connecting plate 24 and the right connecting plate 20 to have an automatic reset function.

[0038] For example, in some embodiments, a first hinge shaft positioning plate 13 is fixed on the first rolling plate 9, and a second hinge shaft positioning plate 23 is fixed on the third rolling plate 25. Both the first hinge shaft positioning plate 13 and the second hinge shaft positioning plate 23 are in a "z" shape. One end of the first hinge shaft positioning plate 13 is fixed on the first rolling plate 9, and the other end of the first hinge shaft positioning plate 13 is arranged above the left connecting plate 24. A first round hole is provided at the upper end of the first hinge shaft positioning plate 13, and a first auxiliary bearing 17 matched with the first hinge shaft is provided in the first round hole. One end of the second hinge shaft positioning plate 23 is fixed on the third rolling plate 25, and the other end of the second hinge shaft positioning plate 23 is arranged above the right connecting plate 20. A second round hole is provided at the upper end of the second hinge shaft positioning plate 23, and a second auxiliary bearing 21 matched with the second hinge shaft is provided in the second round hole. Specifically, both the first hinge shaft positioning plate 13 and the second hinge shaft positioning plate 23 are z-shaped plates composed of two right-angle plates, which is convenient for installation and also facilitates the installation of the first auxiliary bearing 17 and the second auxiliary bearing 21.

[0039] In summary, the present invention is provided with a self-centering disc and a clamp on the front side of the mounting base substrate. The first buffer, the second buffer, the third buffer and the fourth buffer cooperate with the first sliding stop, the second sliding stop, the third sliding stop and the fourth sliding stop to enable the self-centering disc to automatically adjust the plug and the long tube to be coaxial when they are in different axes during use and then tighten them, avoiding situations such as insufficient fastening or even damage at the connection of the plug or the long tube.

[0040] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations to these embodiments still fall within the protection scope of the present invention.

Claims

1. A self-centering clamping mechanism, characterized in that, It includes a mounting base substrate and a clamp. The mounting base substrate is a circular plate. At the upper end of the front face of the mounting base substrate, there is a horizontally arranged first slide rail. A first slider is provided on the first slide rail. Inside the first slide rail, there is a first sliding groove that runs through the mounting base substrate from front to back. At the right end of the front face of the mounting base substrate, there is a vertically arranged second slide rail. A second slider is provided on the second slide rail. Inside the second slide rail, there is a second sliding groove that runs through the mounting base substrate from front to back. At the lower end of the front face of the mounting base substrate, there is a horizontally arranged third slide rail. A third slider is provided on the third slide rail. Inside the third slide rail, there is a third sliding groove that runs through the mounting base substrate from front to back. At the left end of the front face of the mounting base substrate, there is a vertically arranged fourth slide rail. A fourth slider is provided on the fourth slide rail. Inside the fourth slide rail, there is a fourth sliding groove that runs through the mounting base substrate from front to back. A first sliding stop is provided on the first slider. One end of the first sliding stop is fixed to the first slider, and the other end of the first sliding stop penetrates through the first sliding groove and extends to the rear side of the mounting base substrate. At the left and right ends at the rear side of the first sliding groove, there are first buffers that cooperate with the first sliding stop. A second sliding stop is provided on the second slider. One end of the second sliding stop is fixed to the second slider, and the other end of the second sliding stop penetrates through the second sliding groove and extends to the rear side of the mounting base substrate. At the upper and lower ends at the rear side of the second sliding groove, there are second buffers that cooperate with the second sliding stop. A third sliding stop is provided on the third slider. One end of the third sliding stop is fixed to the third slider, and the other end of the third sliding stop penetrates through the third sliding groove and extends to the rear side of the mounting base substrate. At the left and right ends at the rear side of the third sliding groove, there are third buffers that cooperate with the third sliding stop. A fourth sliding stop is provided on the fourth slider. One end of the fourth sliding stop is fixed to the fourth slider, and the other end of the fourth sliding stop penetrates through the fourth sliding groove and extends to the rear side of the mounting base substrate. At the upper and lower ends at the rear side of the fourth sliding groove, there are fourth buffers that cooperate with the fourth sliding stop. A self-centering disk and a clamp are provided on the front side of the mounting base substrate. The self-centering disk includes a ring. At the exact upper end of the ring, there is a first rolling plate. At the exact right end of the ring, there is a second rolling plate. At the exact lower end of the ring, there is a third rolling plate. At the exact left end of the ring, there is a fourth rolling plate. On the left and right sides at the upper end of the first rolling plate, there are first rolling bearings that contact the first rolling plate. On the upper and lower sides at the right end of the second rolling plate, there are second rolling bearings that contact the second rolling plate. On the left and right sides at the lower end of the third rolling plate, there are third rolling bearings that contact the third rolling plate. On the upper and lower sides at the left end of the fourth rolling plate, there are fourth rolling bearings that contact the fourth rolling plate. The first rolling bearing is connected to the first sliding stop through a first rolling bearing seat.The second rolling bearing is connected to the second sliding flap through a second rolling bearing seat, the third rolling bearing is connected to the third sliding flap through a third rolling bearing seat, the fourth rolling bearing is connected to the fourth sliding flap through a fourth rolling bearing seat, and the clamp is arranged in front of the ring.

2. The self-centering clamping mechanism according to claim 1, wherein The front end face of the mounting base substrate is provided with a first slide rail mounting groove for mounting the first slide rail, a second slide rail mounting groove for mounting the second slide rail, a third slide rail mounting groove for mounting the third slide rail, and a fourth slide rail mounting groove for mounting the fourth slide rail.

3. The self-centering clamping mechanism according to claim 1, characterized in that, The first sliding flap, the second sliding flap, the third sliding flap, and the fourth sliding flap are all right-angled flaps.

4. The self-centering clamping mechanism according to claim 1, wherein, In the middle of the rear end face of the mounting base substrate, there is a slip ring seat for mating connection with the lathe.

5. The self-centering clamping mechanism according to claim 1, characterized in that, The first rolling plate, the second rolling plate, the third rolling plate, and the fourth rolling plate are arranged in a circumferential array centered on the circular ring.

6. The self-centering clamping mechanism according to claim 1, wherein, The clamp includes a left connecting plate and a right connecting plate. The right end face of the left connecting plate is provided with a left semi-circular groove, and the left end face of the right connecting plate is provided with a right semi-circular groove that mates with the left semi-circular groove. The left semi-circular groove and the right semi-circular groove form a clamping groove. The upper end of the left connecting plate is hinged to the circular ring through a first hinge shaft, and the right connecting plate is hinged to the circular ring through a second hinge shaft. The rear ends of the first hinge shaft and the second hinge shaft both extend between the circular ring and the mounting base substrate. Between the circular ring and the mounting base substrate, there are a first pushing cylinder and a second pushing cylinder. The rear end of the first hinge shaft is fixedly connected to a first connecting rod. One end of the first connecting rod is fixedly connected to the rear end of the first hinge shaft, and the other end of the first connecting rod is hinged to the cylinder rod of the first pushing cylinder. The rear end of the second hinge shaft is fixedly connected to a second connecting rod. One end of the second connecting rod is fixedly connected to the rear end of the second hinge shaft, and the other end of the second connecting rod is hinged to the cylinder rod of the second pushing cylinder.

7. The self-centering clamping mechanism according to claim 6, characterized in that, Between the third rolling plate and the fourth rolling plate, there is a first inclined plate connected to the circular ring. Between the first rolling plate and the second rolling plate, there is a second inclined plate connected to the circular ring. The inclination angles of the first inclined plate and the second inclined plate are both 45 degrees. The first pushing cylinder is connected to the lower end of the first inclined plate through a first cylinder mounting seat, and the second pushing cylinder is connected to the upper end of the second inclined plate through a second cylinder mounting seat.

8. The self-centering clamping mechanism according to claim 6, characterized in that, A first polyurethane gasket is provided in the left semi-circular groove, and a second polyurethane gasket is provided in the right semi-circular groove.

9. The self-centering clamping mechanism according to claim 6, wherein, The left upper end of the left connecting plate is provided with a first jaw spring seat, and the right lower end of the right connecting plate is provided with a second jaw spring seat. The right end face of the first jaw spring seat is provided with a first return spring groove, and a first return spring is provided in the first return spring groove. One end of the first return spring is arranged in the first return spring groove, and the other end of the first return spring penetrates through the left connecting plate and abuts against the right connecting plate. The left end face of the second jaw spring seat is provided with a second return spring groove, and a second return spring is provided in the second return spring groove. One end of the second return spring is arranged in the second return spring groove, and the other end of the second return spring penetrates through the right connecting plate and abuts against the left connecting plate.

10. The self-centering clamping mechanism according to claim 6, wherein, A first hinge shaft positioning plate is fixed on the first rolling plate, and a second hinge shaft positioning plate is fixed on the third rolling plate. Both the first hinge shaft positioning plate and the second hinge shaft positioning plate are in a "z" shape. One end of the first hinge shaft positioning plate is fixed on the first rolling plate, and the other end of the first hinge shaft positioning plate is disposed above the left connecting plate. A first round hole is provided at the upper end of the first hinge shaft positioning plate, and a first auxiliary bearing matching with the first hinge shaft is provided in the first round hole. One end of the second hinge shaft positioning plate is fixed on the third rolling plate, and the other end of the second hinge shaft positioning plate is disposed above the right connecting plate. A second round hole is provided at the upper end of the second hinge shaft positioning plate, and a second auxiliary bearing matching with the second hinge shaft is provided in the second round hole.

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