Cutting device for preventing carbon fiber shaft from being damaged

Abstract

The invention discloses a cutting device for preventing a carbon fiber shaft from being damaged, and belongs to the technical field of cutting. Comprising a cutting unit and is provided with a blade for cutting; the clamping unit is provided with a front clamping set and a rear clamping set which can be close to each other or away from each other, and the front clamping set comprises a front check block. According to the cutting device capable of preventing the carbon fiber shaft from being damaged, the technical problems that in the rapid rotation cutting process of the cutting blade, when the cutting blade makes contact with the carbon fiber shaft, the carbon fiber shaft can be extruded, deformation is caused, the end faces, at the two ends of a notch, of the carbon fiber shaft are easily cut mistakenly, and unfilled corners are generated during cutting of the blade are solved.

Description

Technical Field

[0001] This application relates to the technical field of cutting, and specifically relates to a cutting device for preventing defects in carbon fiber shafts. Background Art

[0002] The carbon fiber shaft is mainly woven or multi-layered composite of carbon fiber materials, and has the characteristics of light weight, high strength and high stiffness. Each carbon fiber is composed of thousands of even smaller carbon fibers, with a diameter of about 5 to 8 micrometers. The carbon fiber shaft is widely used in fields such as the automotive field, the aerospace field and the marine field, and is a transmission system component with the characteristics of light weight, high strength, high stiffness and wear resistance.

[0003] After the carbon fiber shaft is manufactured, a part of it needs to be cut for quality inspection. Since the carbon fiber shaft is woven, when the cutting blade rotates rapidly and cuts, when it contacts the carbon fiber shaft, it will squeeze the carbon fiber shaft, resulting in deformation, and it is easy to cause the blade to mis-cut the end faces of the carbon fiber shaft at both ends of the cut, resulting in chamfer defects.

[0004] Therefore, it is necessary to provide a cutting device for preventing defects in carbon fiber shafts to solve the above problems. Summary of the Invention

[0005] Based on the above problems existing in the prior art, the purpose of this application is to provide a cutting device for preventing defects in carbon fiber shafts to solve the problems raised in the above background art.

[0006] The technical solution adopted by this application to solve its technical problems is: a cutting device for preventing defects in carbon fiber shafts, including a cutting unit, and having a blade for cutting; A clamping unit, having a front clamping group and a rear clamping group that can approach or move away from each other, and the front clamping group includes a front stop block; A left support unit, including a left expansion sleeve and a left positioning column. The left end of the left positioning column is fixedly connected to the frame. The left expansion sleeve includes a left inner ring and a left outer ring. The right end of the left inner ring has a left plug-in section with a left-small-right-large cone shape. The left outer ring has a left conical hole that matches the left plug-in section. The right end of the left positioning column is fixedly connected to the left inner ring. The left plug-in section of the left inner ring is inserted into the left conical hole. The left outer ring is located on the left side of the blade and between the blade and the left inner ring. The carbon fiber shaft is sleeved on the left expansion sleeve; And a left self-expanding structure, having a trigger assembly, a left hydraulic pipe and a left hydraulic cavity opened in the left positioning column. The right end of the left hydraulic cavity forms a left working cavity. A left push rod is slidably installed in the right end of the left working cavity along the left-right direction; The triggering assembly includes a triggering button and a piston pipeline opened in the front stop block. One end of the triggering button protrudes from the front clamping surface of the front stop block, and the other end is fixed with a piston slidably installed in the piston pipeline. One end of the left hydraulic pipe is communicated with the left hydraulic cavity, and the other end is communicated with the piston pipeline. When the front clamping group and the rear clamping group approach each other to clamp the carbon fiber shaft, the triggering button moves towards the inside of the piston pipeline, and the piston pushes the liquid medium in the piston pipeline to flow into the left working cavity, so that the left push rod pushes the left outer ring to the right.

[0007] Further, a left convex portion extends from the right end of the left positioning column. The left convex portion is coaxially arranged with the left expansion sleeve, and the rightmost end of the left outer ring protrudes from the left convex portion. An elastic telescopic connection of a left tension spring is arranged along the circumferential direction inside the left inner ring. The left tension spring is elastically telescopically connected with the outer surface of one end of the left outer ring close to the left push rod. When the left push rod pushes the left outer ring to slide to the right, the left tension spring is stretched.

[0008] Further, the device further includes a workbench fixed at the middle part of the frame. The front clamping group and the rear clamping group are both arranged on the workbench. A chute is opened at the top of the workbench. A through groove is communicated with the left side of the chute. The front clamping group is arranged at the front end of the chute, the rear clamping group is arranged at the rear end of the chute, and the front stop block is slidably connected with the chute.

[0009] Further, the front clamping group further includes a front lead screw threadedly connected to the front end of the workbench. The front lead screw is rotatably connected to the back side of the front stop block to push the front stop block to travel in the chute. The rear clamping group includes a rear lead screw and a rear stop block threadedly connected to the rear end of the workbench. The rear lead screw is rotatably connected to the back side of the rear stop block to push the rear stop block to travel in the chute.

[0010] Further, it further includes a right support unit. The blade is located between the left support unit and the right support unit. The right end of the frame is fixedly connected with a side slide rail. The right support unit includes a bracket and a right expansion sleeve slidably connected to the side slide rail. One side of the bracket is fixedly connected with a right positioning column. The right expansion sleeve includes a right inner ring and a right outer ring. The left end of the right inner ring has a right plug-in section with a right-small and left-large taper. The right outer ring has a right tapered hole matching the right plug-in section. The left end of the right positioning column is fixedly connected with the right inner ring. The right plug-in section of the right inner ring is inserted into the right tapered hole. The right outer ring is located on the right side of the blade and between the blade and the right inner ring. A right hydraulic cavity is opened in the right positioning column. A right working cavity is formed at the left end of the right hydraulic cavity. A right push rod is slidably installed along the left-right direction at the left end of the right working cavity. The right push rod faces the right outer ring.

[0011] Further, a right convex portion extends from the left end of the right positioning post. The right convex portion is coaxially arranged with the right expansion sleeve, and the leftmost end of the right outer ring protrudes from the right convex portion. A right pull spring is elastically telescopically connected along the circumferential direction inside the right inner ring. The right pull spring is elastically telescopically connected to the outer surface of one end of the right outer ring close to the right push rod. When the right push rod pushes the right outer ring to slide leftward, the right pull spring is stretched. The right pull spring and the right push rod are arranged at intervals along the circumferential direction of the right expansion sleeve.

[0012] Further, a through hole is formed in the upper surface of the bracket close to the side slide rail. A cavity located at the top of the side slide rail is arranged on the left side of the through hole, and a bracket hydraulic cavity communicated with the right hydraulic cavity is arranged on the right side. A slider is movably and sealingly connected to one end of the bracket hydraulic cavity close to the through hole. A pressing strip is slidably connected in the cavity. One end of the pressing strip close to the side slide rail is a rubber part. A bolt is threadedly connected in the through hole, and the bolt abuts against the slider and the part of the pressing strip located in the through hole.

[0013] Further, an upper slide rail is fixedly connected to the right side of the top surface of the frame. A support block is slidably connected to the upper slide rail, and a rubber layer for supporting the right positioning post is arranged at the top of the support block.

[0014] Further, the distance between the blade and the left outer ring and the right outer ring during cutting is 2 - 5 mm.

[0015] The beneficial effects of the present application are as follows: A cutting device for preventing carbon fiber shaft defects provided by the present application uses a left expansion sleeve and a right expansion sleeve to hold the cutting part of the carbon fiber shaft, so that the inner wall of the carbon fiber shaft is held by the expansion sleeve, reducing the deformation of the carbon fiber shaft and preventing serious deformation during cutting of the carbon fiber shaft. By setting a trigger button to cooperate with the fixture for clamping the carbon fiber shaft, after the carbon fiber shaft is clamped in place, the expansion sleeve automatically abuts against the inner wall of the carbon fiber shaft, saving working steps and thus improving work efficiency. By arranging a bolt at the bottom of the bracket, after the bracket reaches the corresponding position, by screwing the bolt, the pressing strip and the slider are simultaneously abutted and displaced to both sides respectively. The pressing strip presses on the side slide rail to prevent the bracket from displacing, and the movement of the slider pushes the medium in the bracket hydraulic cavity to flow, so that the right expansion sleeve abuts against the inner wall of the carbon fiber shaft, and the operation is simple and convenient.

[0016] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The following will refer to the drawings for a further detailed description of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings: Figure 1 is the overall schematic diagram of this application; Figure 2 is the schematic diagram of the frame of this application; Figure 3 is of this application Figure 2 the enlarged schematic diagram of area A therein; Figure 4 is the schematic diagram of the front clamping group of this application; Figure 5 is the schematic diagram of the front stop block of this application; Figure 6 is the schematic diagram of the side of the frame of this application; Figure 7 is of this application Figure 6 the enlarged schematic diagram of area B therein; Figure 8 is of this application Figure 6 the enlarged schematic diagram of area C therein; Figure 9 is the overall schematic diagram of the expansion sleeve of this application; Figure 10 is the sectional schematic diagram of the expansion sleeve of this application; Figure 11 is of this application Figure 6 the enlarged schematic diagram of area D therein; Figure 12 is the schematic diagram of the clamping of the carbon fiber shaft of this application; Figure 13 is of this application Figure 12 the enlarged schematic diagram of area E therein; Figure 14 is of this application Figure 12 the enlarged schematic diagram of area F therein; Among them, the reference numerals in the figures: 1. Frame; 11. Upper sliding rail; 12. Side sliding rail; 13. Support block; 131. Rubber layer; 2. Workbench; 21. Chute; 22. Through groove; 3. Front clamping group; 31. Front stop block; 311. Trigger button; 312. Piston; 313. Piston pipe; 3131. Piston cavity; 314. Front clamping surface; 32. Front lead screw; 4. Rear clamping group; 41. Rear stop block; 42. Rear lead screw; 5. Left support unit; 51. Left hydraulic pipe; 52. Left positioning column; 521. Left convex part; 522. Left hydraulic cavity; 523. Left working cavity; 524. Left push rod; 53. Left expansion sleeve; 531. Left outer ring; 5311. Left tapered hole; 532. Left inner ring; 5321. Left insertion section; 54. Left tension spring; 6. Right support unit; 61. Right positioning column; 611. Right convex part; 612. Right hydraulic cavity; 613. Right working cavity; 614. Right push rod; 62. Right expansion sleeve; 621. Right outer ring; 6211. Right tapered hole; 622. Right inner ring; 6221. Right insertion section; 63. Right tension spring; 64. Slide block; 65. Pressing strip; 651. Rubber part; 66. Bolt; 67. Bracket; 671. Bracket hydraulic cavity; 672. Cavity; 673. Through hole; 7. Cutting unit; 71. Blade; 8. Carbon fiber shaft. Detailed implementation manners

[0018] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] As Figure 1-14 shown, the present application provides a technical solution: a cutting device for preventing carbon fiber shafts from being defective, including a cutting unit 7, installed at the rear side of the frame 1 and having a blade 71 for cutting the carbon fiber shaft 8; A clamping unit, having a front clamping group 3 and a rear clamping group 4 that can approach or move away from each other, and the front clamping group 3 includes a front stop block 31; The left support unit 5 includes a left expansion sleeve 53 and a left positioning column 52. The left end of the left positioning column 52 is fixedly connected to the frame 1. The left expansion sleeve 53 includes a left inner ring 532 and a left outer ring 531. The right end of the left inner ring 532 has a left plug-in section 5321 with a left-small-right-large conical shape. The inner circumferential wall of the left outer ring 531 forms a left conical hole 5311 that matches the left plug-in section 5321. The right end of the left positioning column 52 is fixedly connected to the left inner ring 532. The left plug-in section 5321 of the left inner ring 532 is inserted into the left conical hole 5311. The left outer ring 531 is located on the left side of the blade 71 and between the blade 71 and the left inner ring 532. The carbon fiber shaft 8 is sleeved on the left expansion sleeve 53; And a left self-expanding structure, which has a trigger assembly, a left hydraulic pipe 51, and a left hydraulic cavity 522 opened in the left positioning column 52. A left working cavity 523 is formed at the right end of the left hydraulic cavity 522. A left push rod 524 is slidably installed in the right end of the left working cavity 523 in the left-right direction, and the left push rod 524 faces the left outer ring 531; The trigger assembly includes a trigger button 311 and a piston pipe 313 installed in the front stop block 31. One end of the piston pipe 313 protrudes from the front stop block 31 on the side close to the left hydraulic pipe 51. A piston cavity 3131 is provided in the piston pipe 313. One end of the trigger button 311 protrudes from the front clamping surface 314 of the front stop block 31, and the other end is fixed with a piston 312 slidably installed in the piston cavity 3131. One end of the left hydraulic pipe 51 is communicated with the left hydraulic cavity 522, and the other end is connected to the piston pipe 313 and communicated with the piston cavity 3131. When the front clamping group 3 and the rear clamping group 4 approach each other to clamp the carbon fiber shaft 8, the trigger button 311 moves inward in the direction of the piston pipe 313, and the piston 312 pushes the liquid medium in the piston cavity 3131 to flow into the left working cavity 523, so that the left push rod 524 pushes the left outer ring 531 to the right.

[0021] The right end of the left positioning column 52 extends with a left convex portion 521. The left convex portion 521 is coaxially arranged with the left expansion sleeve 53, and the rightmost end of the left outer ring 531 protrudes from the left convex portion 521; A left tension spring 54 is elastically telescopically connected along the circumferential direction inside the left inner ring 532. The left tension spring 54 is elastically telescopically connected to the outer surface of one end of the left outer ring 531 close to the left push rod 524. When the left push rod 524 pushes the left outer ring 531 to slide to the right, the left tension spring 54 generates an elastic force and is stretched. The left tension spring 54 and the left push rod 524 are arranged at intervals along the circumference of the left expansion sleeve 53.

[0022] The device further includes a workbench 2 fixed to the middle part of the frame 1. The front clamping group 3 and the rear clamping group 4 are both arranged on the workbench 2; A chute 21 is formed at the top of the workbench 2. A through groove 22 communicates with the left side of the chute 21. The front clamping group 3 is arranged at the front end of the chute 21, the rear clamping group 4 is arranged at the rear end of the chute 21, and the front stop block 31 is slidably connected to the chute 21.

[0023] The front clamping group 3 further includes a front lead screw 32 threadedly connected to the front end of the workbench 2. The front lead screw 32 is rotatably connected to the back side of the front stop block 31 to push the front stop block 31 to travel in the chute 21. The rear clamping group 4 includes a rear lead screw 42 and a rear stop block 41 threadedly connected to the rear end of the workbench 2. The rear lead screw 42 is rotatably connected to the back side of the rear stop block 41 to push the rear stop block 41 to travel in the chute 21.

[0024] It further includes a right support unit 6. The blade 71 is located between the left support unit 5 and the right support unit 6. The right end of the frame 1 is fixedly connected with a side slide rail 12. The right support unit 6 includes a bracket 67 slidably connected to the side slide rail 12 and a right expansion sleeve 62. One side of the bracket 67 is fixedly connected with a right positioning column 61. The right expansion sleeve 62 includes a right inner ring 622 and a right outer ring 621. The left end of the right inner ring 622 has a right plug-in section 6221 with a right-small and left-large conical shape. The inner wall of the inner circle of the right outer ring 621 forms a right conical hole 6211 matching the right plug-in section 6221. The left end of the right positioning column 61 is fixedly connected with the right inner ring 622. The right plug-in section 6221 of the right inner ring 622 is inserted into the right conical hole 6211. The right outer ring 621 is located on the right side of the blade 71 and between the blade 71 and the right inner ring 622; A right hydraulic cavity 612 is formed in the right positioning column 61. A right working cavity 613 is formed at the left end of the right hydraulic cavity 612. A right push rod 614 is slidably installed in the left end of the right working cavity 613 in the left-right direction. The right push rod 614 faces the right outer ring 621.

[0025] The left end of the right positioning column 61 extends with a right convex part 611. The right convex part 611 is coaxially arranged with the right expansion sleeve 62. The leftmost end of the right outer ring 621 protrudes from the right convex part 611; A right pull spring 63 is elastically telescopically connected along the circumferential direction in the right inner ring 622. The right pull spring 63 is elastically telescopically connected to the outer surface of one end of the right outer ring 621 close to the right push rod 614. When the right push rod 614 pushes the right outer ring 621 to slide leftward, the right pull spring 63 generates an elastic force and is stretched. The right pull spring 63 and the right push rod 614 are arranged at intervals along the circumference of the right expansion sleeve 62.

[0026] The upper surface of the bracket 67 near the side slide rail 12 is provided with a through hole 673. A cavity 672 located at the top of the side slide rail 12 is arranged on the left side of the through hole 673, and a bracket hydraulic cavity 671 communicated with the right hydraulic cavity 612 is arranged on the right side. A slider 64 is movably and sealingly connected to one end of the bracket hydraulic cavity 671 close to the through hole 673. A pressing strip 65 is slidably connected in the cavity 672. One end of the pressing strip 65 close to the side slide rail 12 is a rubber part 651. A bolt 66 is threadedly connected in the through hole 673, and the bolt 66 abuts against the slider 64 and the part of the pressing strip 65 located in the through hole 673.

[0027] The right side of the top surface of the frame 1 is fixedly connected with an upper slide rail 11. A support block 13 is slidably connected to the upper slide rail 11. A rubber layer 131 for supporting the right positioning post 61 is arranged on the top of the support block 13.

[0028] When the blade 71 cuts, the distance from the left outer ring 531 and the right outer ring 621 is 2-5 mm.

[0029] In one embodiment, how is a small section of the end of the carbon fiber shaft cut? Specifically, fix the left inner ring 532 on the left convex part 521, nest the left outer ring 531 on the left inner ring 532, make the left insertion section 5321 located in the left tapered hole 5311, align the left push rod 524 with the left outer ring 531, and put one end of the carbon fiber shaft 8 into the left expansion sleeve 53 and sleeve it towards the end of the left positioning post 52 away from the left convex part 521 until the part to be cut is directly below the blade 71.

[0030] After adjustment, the rear screw rod 42 drives the rear stop block 41 to slide in the chute 21 until it abuts against the rear lower part of the carbon fiber shaft 8. Then, by adjusting the front screw rod 32, the front stop block 31 slides in the chute 21 until the front clamping surface 314 abuts against the front lower part of the carbon fiber shaft 8. At this time, the trigger button 311 is abutted by the carbon fiber shaft 8 and moves towards the direction close to the front stop block 31, driving the piston 312 to push the hydraulic oil in the piston cavity 3131 to flow forward. The hydraulic oil passes through the left hydraulic pipe 51 and the left hydraulic cavity 522 in sequence and is divided into upper and lower two left working cavities 523. The pressure of the hydraulic oil pushes the left push rod 524 towards the left outer ring 531.

[0031] When the left push rod 524 pushes the left outer ring 531 to the right, the left tapered hole 5311 moves to the right along the left insertion section 5321, making the diameter of the left outer ring 531 gradually increase. Thus, the outer peripheral wall of the left outer ring 531 abuts against the inner peripheral wall of the carbon fiber shaft 8, supporting the part of the carbon fiber shaft 8 near the cutting part so that it will not be deformed during cutting. At the same time, the left tension spring 54 has elastic potential energy due to the tension generated by the movement of the left outer ring 531.

[0032] The cutting blade 71 is controlled by the control center to cut the carbon fiber shaft 8. After the cutting is completed, the blade 71 is lifted, and the rear lead screw 42 is adjusted to drive the rear stop block 41 to slide away from the carbon fiber shaft 8 in the chute 21. Then, the front lead screw 32 is adjusted to drive the front stop block 31 to slide away from the carbon fiber shaft 8 in the chute 21. At this time, the front clamping surface 314 is separated from the carbon fiber shaft 8, the trigger button 311 is no longer held against the carbon fiber shaft 8, and the elastic potential energy of the left tension spring 54 is released, pulling the left push rod 524 back. The diameter of the left outer ring 531 becomes smaller and does not abut against the inner wall of the carbon fiber shaft 8. The hydraulic oil in the pipeline flows back, pushing the piston 312 out, causing the trigger button 311 to protrude from the front stop block 31, and then the carbon fiber shaft 8 can be removed.

[0033] In another embodiment, the device can also cut the carbon fiber shaft according to different requirements. Specifically, when it is necessary to retain the shaft section of the cut carbon fiber shaft 8, the left inner ring 532 is fixed on the left convex part 521, the left outer ring 531 is nested on the left inner ring 532, so that the left insertion section 5321 is located in the left tapered hole 5311. The left push rod 524 is aligned with the left outer ring 531. One end of the carbon fiber shaft 8 is sleeved along the left expansion sleeve 53 towards the end of the left positioning post 52 away from the left convex part 521. The right inner ring 622 is fixed on the right convex part 611, the right outer ring 621 is nested on the right inner ring 622, so that the right insertion section 6221 is located in the right tapered hole 6211. The right push rod 614 is aligned with the right outer ring 621.

[0034] The sliding bracket 67 makes the right positioning post 61 and the left positioning post 52 in a concentric position. The carbon fiber shaft 8 on the left positioning post 52 is moved towards the right positioning post 61 until the part to be cut is directly below the blade 71. The cutting part side of the carbon fiber shaft 8 on the left positioning post 52 is supported by the left expansion sleeve 53 in the manner of the above embodiment.

[0035] Turn the bolt 66 to move closer to the upper part of the through hole 673. After the slider 64 is held against by the bolt 66, it moves to the right, pushing the hydraulic oil in the bracket hydraulic cavity 671 to flow. The hydraulic oil passes through the right hydraulic cavity 612 and is divided into two upper and lower right working cavities 613. The pressure of the hydraulic oil pushes the right push rod 614 towards the right outer ring 621.

[0036] When the right push rod 614 pushes the right outer ring 621 to the left, the right conical hole 6211 moves leftward along the right insertion section 6221, causing the diameter of the right outer ring 621 to gradually increase. As a result, the outer peripheral wall of the right outer ring 621 abuts against the inner peripheral wall of the carbon fiber shaft 8, supporting the part of the carbon fiber shaft 8 near the cutting area and preventing deformation during cutting. At the same time, the right tension spring 63 has elastic potential energy due to the tension generated by the movement of the right outer ring 621. The pressing strip 65 advances toward the side slide rail 12 under the abutment of the bolt 66 until the rubber part 651 abuts against the outer wall of the side slide rail 12, preventing the bracket 67 from moving.

[0037] The control center controls the blade 71 to cut the carbon fiber shaft 8. After cutting is completed, the blade 71 is lifted, and the carbon fiber shaft 8 and the left expansion sleeve 53 are made to be in an active state in the manner of the above embodiment. The bolt 66 is turned away from above the through hole 673. The elastic potential energy of the right tension spring 63 is released, pushing the right push rod 614 to retract. The hydraulic oil in the pipeline flows back, and the slider 64 returns to the initial position. The volume of the right outer ring 621 becomes smaller and does not abut against the inner wall of the carbon fiber shaft 8. At this time, the bracket 67 is moved away, and the carbon fiber shaft 8 on the left positioning post 52 and the right positioning post 61 can be taken out respectively.

[0038] In summary, the device is provided with a left expansion sleeve 53 and a right expansion sleeve 62 to abut against the cutting area of the carbon fiber shaft 8, preventing serious deformation of the carbon fiber shaft 8 during cutting. At the same time, it cooperates with the fixture clamping the carbon fiber shaft 8, improving work efficiency and solving the technical problem that during the process of the cutting blade quickly rotating and descending, when contacting the carbon fiber shaft, the carbon fiber shaft will be extruded, resulting in deformation, and it is easy for the blade to mis-cut the end faces of the carbon fiber shaft at both ends of the cut, generating chamfer defects.

[0039] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A cutting device for preventing defects in carbon fiber shafts, characterized in that: It includes a cutting unit and has a blade for cutting; a clamping unit having a front clamping group and a rear clamping group that can approach or move away from each other, and the front clamping group includes a front stop; a left support unit including a left expansion sleeve and a left positioning post. The left end of the left positioning post is fixedly connected to the frame. The left expansion sleeve includes a left inner ring and a left outer ring. The right end of the left inner ring has a left plug-in section with a tapered shape that is smaller on the left and larger on the right. The left outer ring has a left tapered hole that matches the left plug-in section. The right end of the left positioning post is fixedly connected to the left inner ring. The left plug-in section of the left inner ring is inserted into the left tapered hole. The left outer ring is located on the left side of the blade and between the blade and the left inner ring. The carbon fiber bushing is on the left expansion sleeve; and a left self-tightening structure having a trigger assembly, a left hydraulic pipe, and a left hydraulic cavity opened in the left positioning post. A left working cavity is formed at the right end of the left hydraulic cavity. A left push rod is slidably installed in the left-right direction at the right end of the left working cavity; The trigger assembly includes a trigger button and a piston pipe opened in the front stop. One end of the trigger button protrudes from the front clamping surface of the front stop, and the other end is fixed with a piston slidably installed in the piston pipe. One end of the left hydraulic pipe is communicated with the left hydraulic cavity, and the other end is communicated with the piston pipe. When the front clamping group and the rear clamping group approach each other to clamp the carbon fiber shaft, the trigger button moves into the piston pipe, and the piston pushes the liquid medium in the piston pipe to flow into the left working cavity, causing the left push rod to push the left outer ring to the right.

2. The cutting device for preventing carbon fiber shaft defects according to claim 1, characterized in that: The right end of the left positioning post extends with a left protrusion, and the left protrusion is coaxially arranged with the left expansion sleeve. The rightmost end of the left outer ring protrudes from the left protrusion; A left pull spring is elastically telescopically connected along the circumferential direction inside the left inner ring, and the left pull spring is elastically telescopically connected to the outer surface of one end of the left outer ring close to the left push rod. When the left push rod pushes the left outer ring to slide to the right, the left pull spring is stretched.

3. A cutting device for preventing defects in carbon fiber shafts according to claim 1, characterized in that: The device further includes a workbench fixed at the middle part of the frame, and both the front clamping group and the rear clamping group are arranged on the workbench; A chute is opened at the top of the workbench. A through groove is communicated with the left side of the chute. The front clamping group is arranged at the front end of the chute, the rear clamping group is arranged at the rear end of the chute, and the front stop is slidably connected to the chute.

4. A cutting device for preventing defects in a carbon fiber shaft according to claim 3, characterized in that: The front clamping group further includes a front lead screw threadedly connected to the front end of the workbench. The front lead screw is rotatably connected to the back side of the front stop to push the front stop to travel in the chute. The rear clamping group includes a rear lead screw and a rear stop threadedly connected to the rear end of the workbench. The rear lead screw is rotatably connected to the back side of the rear stop to push the rear stop to travel in the chute.

5. A cutting device for preventing defects in carbon fiber shafts according to claim 1, characterized in that: It further includes a right support unit. The blade is located between the left support unit and the right support unit. The right end of the frame is fixedly connected with a side slide rail. The right support unit includes a bracket and a right expansion sleeve that are slidably connected to the side slide rail. One side of the bracket is fixedly connected with a right positioning column. The right expansion sleeve includes a right inner ring and a right outer ring. The left end of the right inner ring has a right insertion section with a conical shape that is smaller on the right and larger on the left. The right outer ring has a right conical hole that matches the right insertion section. The left end of the right positioning column is fixedly connected with the right inner ring. The right insertion section of the right inner ring is inserted into the right conical hole. The right outer ring is located on the right side of the blade and between the blade and the right inner ring; A right hydraulic cavity is formed in the right positioning column. A right working cavity is formed at the left end of the right hydraulic cavity. A right push rod is slidably installed in the left end of the right working cavity in the left-right direction. The right push rod faces the right outer ring.

6. The cutting device for preventing defects of carbon fiber shafts according to claim 5, wherein: The left end of the right positioning column extends with a right protrusion. The right protrusion is coaxially arranged with the right expansion sleeve. The leftmost end of the right outer ring protrudes from the right protrusion; A right pull spring is elastically telescopically connected along the circumferential direction in the right inner ring. The right pull spring is elastically telescopically connected with the outer surface of one end of the right outer ring close to the right push rod. When the right push rod pushes the right outer ring to slide leftward, the right pull spring is stretched. The right pull spring and the right push rod are arranged at intervals along the circumferential direction of the right expansion sleeve.

7. A cutting device for preventing defects in a carbon fiber shaft according to claim 5, characterized in that: A through hole is formed in the upper surface of the bracket close to the side slide rail. A cavity located at the top of the side slide rail is arranged on the left side of the through hole. A bracket hydraulic cavity communicated with the right hydraulic cavity is arranged on the right side. One end of the bracket hydraulic cavity close to the through hole is movably and sealingly connected with a slider. A pressing strip is slidably connected in the cavity. One end of the pressing strip close to the side slide rail is a rubber part. A bolt is threadedly connected in the through hole. The bolt abuts against the slider and the part of the pressing strip located in the through hole.

8. A cutting device for preventing defects in carbon fiber shafts according to claim 1, characterized in that: The right side of the top surface of the frame is fixedly connected with an upper slide rail. A support block is slidably connected to the upper slide rail. A rubber layer for supporting the right positioning column is arranged at the top of the support block.

9. A cutting device for preventing defects in a carbon fiber shaft according to claim 5, characterized in that: When the blade cuts, the distances from the left outer ring and the right outer ring are 2 to 5 mm.

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