A splicing method for a carbon fiber tube frame

Abstract

The present application discloses a splicing method for a carbon fiber tube frame. First, according to the design drawings, a tube joint is fabricated using 3D printing technology. The tube joint is made of nylon and has a multi-end structure. The ends of the tube joint are one or both of an external connection type and an internal connection type. The outer wall of the external connection type end is provided with a spiral external glue groove, and the area ratio of the external glue groove to the total area of the outer wall of the external connection type end is 50% - 80%. Then, the carbon fiber tubes are cut according to the design dimensions. The carbon fiber tubes have various specifications with different diameters and correspond to each end. Finally, according to the design drawings of the carbon fiber tube frame and the set splicing sequence, each tube joint and each carbon fiber tube are spliced together using glue, and the glue fills the external glue groove. After the glue solidifies, the splicing of the carbon fiber tube frame is completed. The present application has the effects of improving the splicing efficiency of the carbon fiber tube frame and improving the splicing accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of inspection tools, and in particular to a splicing method for a carbon fiber tube frame. Background Art

[0002] Currently, the splicing method of a carbon fiber tube frame is usually to purchase carbon fiber tubes and cut them according to the size. When splicing, a simple tooling is designed to fix the position of each tube, and the connection between the tubes is wrapped with carbon fiber cloth and glued and cured. After the glue is cured, the interface is polished to make the interface between the tubes as beautiful as possible, and the splicing of the carbon fiber tube frame is completed. However, the process of wrapping the connection between the tubes with carbon fiber cloth is relatively complex, and this splicing method has the following disadvantages: low efficiency, large splicing error, long production time, high cost, and easy cracking.

[0003] Regarding the above related technologies, the applicant believes that there are the following defects: the related carbon fiber tube frame splicing method has low efficiency, large splicing error, long production time, high cost, and the completed carbon fiber tube frame is prone to cracking. Summary of the Invention

[0004] In order to improve the splicing efficiency of the carbon fiber tube frame, improve the splicing accuracy, shorten the splicing time, reduce the cost, and reduce the cracking of the carbon fiber tube frame, the present application provides a splicing method for a carbon fiber tube frame.

[0005] A splicing method for a carbon fiber tube frame provided by the present application adopts the following technical solutions:

[0006] A splicing method for a carbon fiber tube frame includes the following steps:

[0007] According to the design drawing, a pipe joint is made by using 3D printing technology. The pipe joint is made of nylon material, and the pipe joint is provided with one or both of an external connection type end and an internal connection type end. The outer wall of the external connection type end is provided with a spiral external glue groove;

[0008] The carbon fiber tube is cut according to the design size. The carbon fiber tube has various specifications with different diameters and corresponds to each end;

[0009] According to the design drawing of the carbon fiber tube frame and the set splicing sequence, each pipe joint and each carbon fiber tube are spliced with glue, and the glue fills the external glue groove. After the glue coagulates, the splicing of the carbon fiber tube frame is completed.

[0010] By adopting the above technical solutions, making pipe joints using 3D printing technology can produce various types of pipe joints as needed, thus meeting the requirements of carbon fiber tube frames of various shapes. Moreover, the manufacturing precision of the pipe joints is high, improving the splicing precision of the carbon fiber tube frames. When the pipe joints and carbon fiber tubes are spliced, the connection between the pipe joints and carbon fiber tubes is fixed with glue. The process is simple, improving efficiency, shortening the splicing time, and reducing costs. In order to make the glue stick firmly, an external glue groove is provided on the outer wall of the external connection type end, increasing the glue amount at the connection between the end and the carbon fiber tube, thereby enhancing the connection firmness between the pipe joint and the carbon fiber tube and reducing the cracking of the carbon fiber tube frame.

[0011] Preferably, the outer diameter of the external connection type end is 0.4 mm smaller than the inner diameter of the carbon fiber tube corresponding to this end, and the inner diameter of the internal connection type end is 0.4 mm larger than the outer diameter of the carbon fiber tube corresponding to this end.

[0012] By adopting the above technical solutions, the glue amount is increased, and the area where the glue contacts the end and the carbon fiber tube is increased, thereby enhancing the connection firmness between the pipe joint and the carbon fiber tube and reducing the cracking of the carbon fiber tube frame.

[0013] Preferably, the ratio of the area of the external glue groove to the total area of the outer wall of the external connection type end is 50% - 80%.

[0014] By adopting the above technical solutions, when the ratio is less than 50%, the carbon fiber tube is likely to become loose; when the ratio is greater than 80%, the end is likely to crack, and the advantage is not significant compared with the connection method using carbon fiber cloth.

[0015] Preferably, the inner hole of the internal connection type end includes an internal connection hole, a guiding hole, and a positioning hole. The diameter of the internal connection hole is 0.4 mm larger than the outer diameter of the carbon fiber tube corresponding to this internal connection type end. The diameter of the positioning hole is equal to the outer diameter of the carbon fiber tube corresponding to this internal connection type end. The guiding hole is a conical hole. The positioning hole is provided at the root of the internal connection type end, and the positioning hole, guiding hole, and internal connection hole are connected in sequence.

[0016] By adopting the above technical solutions, the glue amount is increased, and at the same time, through the setting of the positioning hole, the problem of the increased position error of the carbon fiber tube caused by increasing the glue amount is solved.

[0017] Preferably, an internal glue groove is provided on the inner wall of the internal connection type end. The ratio of the area of the internal glue groove to the total area of the inner wall of the internal connection type end is 50% - 80%. When each pipe joint and each carbon fiber tube are spliced, the glue fills the internal glue groove.

[0018] By adopting the above technical solutions, the internal glue groove can increase the glue amount, thereby enhancing the connection firmness between the internal connection type end and the carbon fiber tube.

[0019] Preferably, a sleeve is sleeved on the root of the external connection type end head, and the inner diameter of the sleeve is equal to the outer diameter of the corresponding carbon fiber tube.

[0020] By adopting the above technical solution, the sleeve is used to position the carbon fiber tube, keeping the gap between the inner wall of the carbon fiber tube and the outer wall of the end head uniform, so that the glue can coagulate evenly between the inner wall of the carbon fiber tube and the outer wall of the end head, improving the firmness of the carbon fiber tube.

[0021] Preferably, a plurality of limiting blocks are arranged along the inner circumference of the sleeve. There is a gap between the limiting blocks and the root of the sleeve. A glue injection hole is arranged on the side wall of the root of the sleeve, and the glue injection hole is arranged between the limiting block and the root of the sleeve.

[0022] By adopting the above technical solution, glue is injected between the outer wall of the end head and the inner wall of the sleeve through the glue injection hole. Under the action of pressure, the glue gradually fills the gap between the end head and the carbon fiber tube and the outer glue groove. The glue can fill the space between the end head and the carbon fiber tube, with good filling effect, improving the firmness of the connection between the carbon fiber tube and the end head.

[0023] Preferably, exhaust holes are respectively arranged on the side walls of both ends of the carbon fiber tube corresponding to the external connection type end head. After the carbon fiber tube is installed in place, the exhaust holes are aligned with the outer wall of the end head.

[0024] By adopting the above technical solution, the air between the end head and the carbon fiber tube is discharged through the exhaust holes, reducing the glue injection resistance, and at the same time reducing the generation of bubbles in the injected glue, improving the glue injection effect.

[0025] In summary, the present application at least includes the following beneficial technical effects: Using 3D printing technology to manufacture pipe joints can manufacture various types of pipe joints according to needs, thus meeting the needs of carbon fiber tube frames of various shapes, and the manufacturing accuracy of the pipe joints is high, improving the splicing accuracy of the carbon fiber tube frames; The pipe joints and the carbon fiber tubes are spliced, and the connection between the pipe joints and the carbon fiber tubes is fixed with glue. The process is simple, improving efficiency, shortening the splicing time, and reducing costs; In order to make the glue stick firmly, an outer glue groove is arranged on the outer wall of the external connection type end head, increasing the glue amount at the connection between the end head and the carbon fiber tube, thereby improving the connection firmness between the pipe joint and the carbon fiber tube and reducing the cracking of the carbon fiber tube frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of a carbon fiber tube frame according to Embodiment 1 of the present application.

[0027] Figure 2 is a schematic structural diagram of a corner joint according to Embodiment 1 of the present application.

[0028] Figure 3It is a characteristic curve graph showing the relationship between the area of the outer glue groove, the total area of the outer wall of the external connection end, and the service life of the carbon fiber tube frame in the splicing method of Embodiment 2 of the present application and the method of using carbon fiber cloth to connect each carbon fiber tube in the background technology.

[0029] Figure 4 It is a cross-sectional view schematic diagram of the connection between the external connection end and the frame tube in Embodiment 3 of the present application.

[0030] Figure 5 It is a cross-sectional view schematic diagram of the internal connection end in Embodiment 4 of the present application.

[0031] Explanation of reference numerals:

[0032] 11. Frame tube; 111. Exhaust hole; 12. First spoke tube; 13. Second spoke tube; 21. Bend joint; 22. First direct joint; 23. Second direct joint; 24. First central joint; 25. Second central joint; 26. External connection end; 27. Internal connection end; 271. Internal connection hole; 272. Guide hole; 273. Positioning hole; 274. Inner glue groove; 28. Outer glue groove; 29. Tube sleeve; 291. Limit block; 292. Glue injection hole. Detailed implementation manners

[0033] The following further elaborates on the present application Figures 1-5 in detail with reference to the appended

[0034] The embodiment of the present application discloses a splicing method for a carbon fiber tube frame.

[0035] Embodiment 1

[0036] Refer to Figure 1 and Figure 2, the carbon fiber tube frame of the embodiment of the present application includes multiple carbon fiber tubes and multiple pipe joints. Each carbon fiber tube is connected into a carbon fiber tube frame through each pipe joint. The pipe joint is provided with one or both of an external connection type end 26 and an internal connection type end 27. Among them, the outer wall of the external connection type end 26 is provided with a spiral external glue groove 28. The external connection type end 26 is sleeved inside the carbon fiber tube, and the internal connection type end 27 is sleeved outside one end of the carbon fiber tube. The carbon fiber tube has three types: a frame tube 11, a first spoke tube 12, and a second spoke tube 13. The frame tubes 11 are connected into a frame shape through pipe joints, and the first spoke tubes 12 and the second spoke tubes 13 connect the frame tubes 11 to each other through pipe joints. The inner diameters of the frame tube 11 and the first spoke tube 12 are equal, the outer diameters of the frame tube 11 and the first spoke tube 12 are equal, the outer diameter of the first spoke tube 12 is greater than the outer diameter of the second spoke tube 13, and the inner diameter of the second spoke tube 13 is smaller than the outer diameter of the external connection type end 26, so that the second spoke tube 13 cannot be connected to the external connection type end 26, and the frame tube 11 and the first spoke tube 12 cannot be connected to the internal connection type end 27 either, thus realizing error prevention. The pipe joint has five types: an elbow joint 21, a first straight joint 22, a second straight joint 23, a first central joint 24, and a second central joint 25. The elbow joint 21 is used to connect the frame tube 11. The first straight joint 22 and the second straight joint 23 are installed on the frame tube 11. Both the first central joint 24 and the second central joint 25 are arranged inside the frame shape formed by the connection of the frame tubes 11, and the first central joint 24 is arranged below the second central joint 25. The elbow joint 21 is provided with three external connection type ends 26 and one internal connection type end 27. Among them, the three external connection type ends 26 are in the same horizontal plane, and the angles between the three external connection type ends 26 are designed according to actual needs. Among them, the internal connection type end 27 and the middle external connection type end 26 are in the same vertical plane and both face the inside of the frame shape formed by the connection of the frame tubes 11, and the frame tube 11 is connected to the two side external connection type ends 26. Both the first straight joint 22 and the second straight joint 23 are provided with a through pipe hole and an internal connection type end 27. The frame tube 11 passes through the pipe hole, and the internal connection type end 27 faces the inside of the frame shape formed by the connection of the frame tubes 11. The second straight joint 23 is also provided with an external connection type end 26. Among them, the internal connection type end 27 and the external connection type end 26 of the second straight joint 23 are in the same vertical plane and both face the inside of the frame shape formed by the connection of the frame tubes 11. The first central joint 24 is provided with a pipe hole and multiple external connection type ends 26. Among them, one first spoke tube 12 passes through the pipe hole, and the multiple external connection type ends 26 are all in the same horizontal plane. The second central joint 25 is provided with multiple internal connection type ends 27. The first spoke tube 12 is connected to each external connection type end 26, and the second spoke tube 13 is connected to each internal connection type end 27.

[0037] A splicing method for a carbon fiber tube frame includes the following steps:

[0038] S1. According to the design drawings, use 3D printing technology to fabricate each pipe joint, namely the corner joint 21, the first straight joint 22, the second straight joint 23, the first central joint 24, and the second central joint 25 in the above-mentioned carbon fiber tube frame. The pipe joints are made of nylon material, and the outer wall of the external connection type end 26 is provided with a spiral external glue groove 28.

[0039] S2. Cut the carbon fiber tubes according to the design dimensions. The carbon fiber tubes have two different specifications of diameters. The two specifications of carbon fiber tubes are respectively connected to the external connection type end 26 and the internal connection type end 27. Among them, the carbon fiber tubes corresponding to the external connection type end 26 are the frame tubes 11 and the first spoke tubes 12 in the above-mentioned carbon fiber tube frame, and the carbon fiber tubes corresponding to the internal connection type end 27 are the second spoke tubes 13 in the above-mentioned carbon fiber tube frame.

[0040] S3. According to the design drawings of the carbon fiber tube frame and the set splicing sequence, use glue to splice each pipe joint and each carbon fiber tube. And the glue fills the external glue groove 28, the gap between the outer wall of the external connection type end 26 and the inner wall of the frame tube 11, the gap between the outer wall of the external connection type end 26 and the inner wall of the first spoke tube 12, and the gap between the inner wall of the internal connection type end 27 and the outer wall of the carbon fiber tube. After the glue solidifies, the splicing of the carbon fiber tube frame is completed.

[0041] Referring to Figure 2, in the preferred example, the outer diameter of the external connection type end 26 is 0.4 mm smaller than the inner diameters of the frame tube 11 and the first spoke tube 12. A tube sleeve 29 is sleeved outside the root of the external connection type end 26. The inner diameter of the tube sleeve 29, the outer diameter of the frame tube 11, and the outer diameter of the first spoke tube 12 are equal. During installation, one end of the frame tube 11 and the first spoke tube 12 is inserted into the tube sleeve 29. Since there is a 0.2 mm gap between the outer wall of the external connection type end 26 and the inner wall of the frame tube 11 and between the outer wall of the external connection type end 26 and the inner wall of the first spoke tube 12, although it can increase the amount of glue used, it will reduce the position accuracy of the carbon fiber tube. In this embodiment, through the setting of the tube sleeve 29, the frame tube 11 and the first spoke tube 12 are positioned, the assembly accuracy of the frame tube 11 and the first spoke tube 12 is improved, and the gaps between the frame tube 11 and the external connection type end 26 and between the first spoke tube 12 and the external connection type end 26 are kept uniform.

[0042] It should be noted that in this embodiment, the glue is first coated on the outer wall of the external connection type end 26, the external glue groove 28, and the inner wall of the internal connection type end 27, and then each carbon fiber tube and each pipe joint are connected; or each carbon fiber tube and each pipe joint are first assembled into the shape of the carbon fiber tube frame, and then glue is poured into the external glue groove 28, the gap between the outer wall of the external connection type end 26 and the inner wall of the frame tube 11, the gap between the outer wall of the external connection type end 26 and the inner wall of the first spoke tube 12, and the gap between the inner wall of the internal connection type end 27 and the outer wall of the second spoke tube 13.

[0043] The implementation principle of a splicing method for a carbon fiber tube frame in an embodiment of the present application is as follows: The method of the present application uses 3D printing technology to manufacture pipe joints, which can manufacture various types of pipe joints according to needs, thus meeting the requirements of carbon fiber tube frames of various shapes. Moreover, the manufacturing accuracy of the pipe joints is high, improving the splicing accuracy of the carbon fiber tube frame. When the pipe joints and carbon fiber tubes are spliced, the connection between the pipe joints and carbon fiber tubes is fixed with glue. The process is simple, improving efficiency, shortening the splicing time, and reducing costs. In order to make the glue stick firmly, an outer glue groove 28 is provided on the outer wall of the external connection type end 26, increasing the amount of glue at the connection between the end and the carbon fiber tube, thereby improving the connection firmness between the pipe joint and the carbon fiber tube and reducing the cracking of the carbon fiber tube frame.

[0044] Embodiment 2

[0045] The difference from Embodiment 1 is that the ratio of the area of the outer glue groove 28 to the total area of the outer wall of the external connection type end 26 is 50%-80%. Refer to Figure 3 , when the ratio of the area of the outer glue groove 28 to the total area of the outer wall of the external connection type end 26 is less than 50%, the service life of the carbon fiber tube frame of the method of the present application is lower than that of the method of using carbon fiber cloth to connect each carbon fiber tube, and there is no significant advantage. When the ratio of the area of the outer glue groove 28 to the total area of the outer wall of the external connection type end 26 is greater than 80%, the end is prone to cracking, and the service life of the carbon fiber tube frame of the method of the present application is lower than that of the method of using carbon fiber cloth to connect each carbon fiber tube, and there is also no significant advantage. When the ratio of the area of the outer glue groove 28 to the total area of the outer wall of the external connection type end 26 is in the range of 50%-80%, the service life of the carbon fiber tube frame of the method of the present application is higher than that of the method of using carbon fiber cloth to connect each carbon fiber tube, and there is a significant advantage. Among them, when the ratio of the area of the outer glue groove 28 to the total area of the outer wall of the external connection type end 26 is 65%, the service life of the carbon fiber tube frame is the longest.

[0046] Embodiment 3

[0047] Refer to Figure 4, different from the first embodiment, a plurality of limiting blocks 291 are provided along the inner circumference of the sleeve 29, and a gap is left between the limiting blocks 291 and the root of the sleeve. Glue injection holes 292 are provided on the side wall of the root of the sleeve, and the glue injection holes 292 are provided between the limiting blocks 291 and the root of the sleeve. Exhaust holes 111 are respectively provided on the side walls at both ends of the frame tube 11 and the first spoke tube 12. After the carbon fiber tube is installed in place, the frame tube 11 and the first spoke tube 12 are rotated so that the exhaust holes 111 are aligned with the outer wall of the head of the external connection end 26 or the head end of the outer glue groove 28. After each carbon fiber tube and each pipe joint are first assembled into the shape of a carbon fiber tube frame, glue is injected into the gap between the outer wall of the external connection end 26 and the inner wall of the sleeve through the glue injection hole 292. Under the action of pressure, the glue gradually fills from the root of the external connection end 26 to the head of the external connection end 26, filling the gap between the external connection end 26 and the carbon fiber tube and the outer glue groove 28. The air in the carbon fiber tube is discharged from the exhaust holes 111, with fewer bubbles formed in the glue and better filling effect of the glue.

[0048] In this embodiment, each carbon fiber tube and each pipe joint are first assembled into the shape of a carbon fiber tube frame, and then glue is poured into the outer glue groove 28, the gap between the outer wall of the external connection end 26 and the inner wall of the frame tube 11, the gap between the outer wall of the external connection end 26 and the inner wall of the first spoke tube 12, and the gap between the inner wall of the internal connection end 27 and the outer wall of the second spoke tube 13.

[0049] Embodiment Four

[0050] Refer to Figure 5, different from the third embodiment, similar to the external connection end 26, the inner hole of the internal connection end 27 includes an internal connection hole 271, a guiding hole 272, and a positioning hole 273. The diameter of the internal connection hole 271 is 0.4 mm larger than the outer diameter of the second spoke tube 13. The diameter of the positioning hole 273 is equal to the outer diameter of the carbon fiber tube of the corresponding internal connection end 27. The guiding hole 272 is a tapered hole. The positioning hole 273 is provided at the root of the internal connection end 27. The positioning hole 273, the guiding hole 272, and the internal connection hole 271 are connected in sequence. After one end of the second spoke tube 13 is inserted into the internal connection hole 271, it enters the positioning hole 273 under the guidance of the guiding hole 272, so as to keep the gap between the second spoke tube 13 and the inner wall of the internal connection end 27 uniform, so that the gap between the second spoke tube 13 and the inner wall of the internal connection end 27 can be evenly filled with glue, and the problem of large assembly error of the second spoke tube 13 caused by the gap between the inner wall of the internal connection end 27 and the outer wall of the second spoke tube 13 is solved. The inner wall of the internal connection end 27 is provided with an inner glue groove 274. The area ratio of the inner glue groove 274 to the total area of the inner wall of the internal connection end 27 is 50%-80%. During splicing, the glue fills the inner glue groove 274, and the amount of glue used when the internal connection end 27 is connected to the second spoke tube 13 is increased through the inner glue groove 274, thereby improving the firmness between the internal connection end 27 and the second spoke tube 13. When pouring glue, pour glue into the gap between the inner wall of the internal connection end 27 and the second spoke tube 13 from the inner glue groove 274 at the head of the internal connection end 27.

[0051] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A splicing method for a carbon fiber tube frame, characterized in that The steps are as follows: According to the design drawings, a pipe joint is made by using 3D printing technology. The pipe joint is made of nylon material and includes an elbow joint (21), a first straight joint (22), a second straight joint (23), a first central joint (24) and a second central joint (25); The elbow joint (21) is provided with three external connection ends (26) and one internal connection end (27). Among them, the three external connection ends (26) are in the same horizontal plane, and the outer wall of the external connection end (26) is provided with a spiral external glue groove (28); The frame pipes (11) pass through the through holes provided on the first straight joint (22) and the second straight joint (23) respectively. The first straight joint (22) and the second straight joint (23) are both provided with a through hole and an internal connection end (27), and the second straight joint (23) is also provided with an external connection end (26). The internal connection end (27) and the middle external connection end (26) are in the same vertical plane and both face the inside of the frame formed by the frame pipes (11); Cut the carbon fiber pipes according to the design dimensions. The carbon fiber pipes have various specifications with different diameters and correspond to each end; According to the design drawings of the carbon fiber pipe frame and the set splicing sequence, splice each pipe joint and each carbon fiber pipe with glue, and the glue fills the external glue groove (28). After the glue solidifies, the splicing of the carbon fiber pipe frame is completed; The first central joint (24) and the second central joint (25) are both arranged inside the frame formed by the frame pipes (11). The first central joint (24) is provided with a through hole and multiple external connection ends (26). The second central joint (25) is provided with multiple internal connection ends (27). The first central joint (24) is arranged below the second central joint (25); The first spoke pipe (12) and the second spoke pipe (13) connect each external connection end (26), and the second spoke pipe (13) connects each internal connection end (27); The inner hole of the internal connection end (27) includes an internal connection hole (271), a guiding hole (272) and a positioning hole (273). The diameter of the internal connection hole (271) is 0.4 mm larger than the outer diameter of the carbon fiber pipe corresponding to the internal connection end (27). The diameter of the positioning hole (273) is equal to the outer diameter of the carbon fiber pipe corresponding to the internal connection end (27). The guiding hole (272) is a tapered hole. The positioning hole (273) is arranged at the root of the internal connection end (27). The positioning hole (273), the guiding hole (272) and the internal connection hole (271) are connected in sequence. The inner wall of the internal connection end (27) is provided with an internal glue groove (274). The area ratio of the internal glue groove (274) to the total area of the inner wall of the internal connection end (27) is 50%-80%. When splicing each pipe joint and each carbon fiber pipe, the glue fills the internal glue groove (274).

2. A splicing method of a carbon fiber tube frame according to claim 1, characterized in that: The outer diameter of the external connection type end head (26) is 0.4 mm smaller than the inner diameter of the carbon fiber tube corresponding to the external connection type end head (26).

3. A splicing method of a carbon fiber tube frame according to claim 1, characterized in that: The ratio of the area of the outer glue groove (28) to the total outer wall area of the external connection type end head (26) is 50% - 80%.

4. A splicing method for a carbon fiber tube frame according to claim 1, characterized in that: A tube sleeve (29) is sleeved outside the root of the external connection type end head (26), and the inner diameter of the tube sleeve (29) is equal to the outer diameter of the corresponding carbon fiber tube.

5. A splicing method for a carbon fiber tube frame according to claim 4, characterized in that: A plurality of limiting blocks (291) are provided along the inner circumference of the tube sleeve (29), a gap is left between the limiting blocks (291) and the root of the sleeve, and a glue injection hole (292) is provided on the side wall of the root of the sleeve (29), and the glue injection hole (292) is provided between the limiting blocks (291) and the root of the sleeve.

6. A splicing method for a carbon fiber tube frame according to claim 1, characterized in that: Exhaust holes (111) are respectively provided on the side walls at both ends of the carbon fiber tube corresponding to the external connection type end head (26). After the carbon fiber tube is installed in place, the exhaust holes (111) are aligned with the outer wall of the external connection type end head (26).

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