A telescopic assembly of a carbon fiber tubular product production apparatus and the carbon fiber tubular product production apparatus

Abstract

The application discloses a telescopic assembly of a carbon fiber cylindrical product production equipment and the production equipment, and relates to the technical field of carbon fiber product production equipment. The telescopic assembly comprises at least one rack set, two parallel and spaced racks, and a gear. The gear is arranged between the two racks of the same rack set and is in mesh with the two racks. When the gear rotates, the two racks are driven to move in opposite directions. In the application, one gear is used to synchronously drive the two racks to move in opposite directions. When the two racks move from the direction of coincidence to the direction of separation in the extension direction, the total length of the telescopic assembly increases. When the two racks move from the direction of separation to the direction of coincidence in the extension direction, the total length of the telescopic assembly decreases. By controlling the forward rotation and reverse rotation of the gear, the telescopic assembly can be controlled to be telescopic, and the cylindrical mold can be supported to form cylindrical molds with different diameters, so that the production of carbon fiber cylindrical products with different diameters can be realized.

Description

Technical Field

[0001] This invention belongs to the field of carbon fiber component production equipment, specifically, it relates to a telescopic component and production equipment for carbon fiber cylindrical component production equipment. Background Technology

[0002] A telescopic assembly is a device that can support cylindrical molds of different diameters and prevent the diameter of the cylindrical molds from shrinking.

[0003] In the production of carbon fiber insulation cylinders and other carbon fiber products, carbon fibers need to be made into preforms of finished shapes, and then the preforms are fed into high-temperature molding equipment for curing. During the high-temperature curing process, the carbon fibers shrink and deform, causing the preform to shrink or even deform.

[0004] To avoid this situation, a cylindrical mold of a predetermined size needs to be inserted into the carbon fiber preform before it is cured and formed, in order to support the carbon fiber and prevent it from shrinking and deforming.

[0005] However, in actual production, carbon fiber products of various sizes need to be produced according to orders, and even though they are all cylindrical structures, their diameters will vary. If a corresponding cylindrical mold is customized for each size of product, the cost will be very high.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] This invention proposes a telescopic component and production equipment for carbon fiber cylindrical parts production, the purpose of which is to realize the production of carbon fiber parts of different specifications using a single cylindrical mold.

[0008] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: A telescopic component for a carbon fiber cylindrical part manufacturing equipment includes: At least one rack assembly, wherein the rack assembly has two parallel and spaced-apart racks, and the teeth of the two racks are arranged opposite to each other; A gear is positioned between two racks in the same rack group, and the gear meshes with the two racks respectively. When the gear rotates, it drives the two racks to move in opposite directions.

[0009] Furthermore, the telescopic component includes several sets of the aforementioned rack sets, which are arranged crosswise and each meshes with the same gear. Preferably, the telescopic component includes two sets of racks, which are arranged perpendicularly to each other.

[0010] Furthermore, several sets of racks are arranged in layers along the gear axis, with intervals between adjacent rack sets.

[0011] Furthermore, the gear is positioned in the middle of the rack assembly.

[0012] Furthermore, the telescopic assembly has a mounting frame, which includes a central mounting rod and two edge mounting rods arranged on both sides of the central mounting rod, spaced apart from and parallel to the central mounting rod, with the central mounting rod and the edge mounting rods arranged in the same plane; Two parallel grooves are formed between the middle mounting rod and the edge mounting rod, and the two racks of the rack assembly are slidably disposed in the two parallel grooves respectively; The intermediate mounting rod is divided into two ends, and the gear is disposed between the two ends of the intermediate mounting rod.

[0013] Furthermore, the mounting bracket includes a fixed base plate disposed below the strip mounting member for mounting the strip mounting member, and a fixed cover plate disposed above the strip mounting member and abutting against the upper surface of the strip mounting member, with a gear rotatably disposed between the fixed base plate and the fixed cover plate.

[0014] Furthermore, the end of the rack has a limiting block that extends from the end of the rack in the direction of the teeth of the rack.

[0015] Furthermore, the telescopic assembly includes a support plate connected to the end of the rack and extending along the gear axis; Preferably, the support plate is fixedly connected to the limiting block on the end of the rack.

[0016] Furthermore, the telescopic assembly includes a mounting frame, the gear is rotatably connected to the mounting frame, the gear extends along the axial direction with a rotating shaft, and the telescopic assembly includes a support tube sleeved outside the rotating shaft and rotatably abutting against the side wall of the rotating shaft, the support tube being fixedly connected to the mounting frame.

[0017] A carbon fiber cylindrical component production equipment includes any of the telescopic components described above. The carbon fiber cylindrical component production equipment also includes a fixed base and a cylindrical mold with a retractable circumference. The telescopic component is disposed on the fixed base, and the cylindrical mold is sleeved on the telescopic component, with the rack direction of the telescopic component being the same as the radial direction of the cylindrical mold. When the gears of the telescopic component rotate, they drive the rack to move in opposite directions and extend. The rack supports the cylindrical mold, making the diameter of the cylindrical mold larger. When the gears rotate in the opposite direction, they drive the rack to move in opposite directions and shorten. The cylindrical mold loses the supporting effect of the telescopic component and its diameter decreases.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0019] 1. A single gear synchronously drives two racks to move in opposite directions. When the two racks move from overlapping to diverging in their extension direction, the total length of the telescopic assembly increases; when the two racks move from diverging to overlapping in their extension direction, the total length of the telescopic assembly decreases. By controlling the forward and reverse rotation of the gear, the telescopic assembly can be controlled to extend and retract, thereby supporting the cylindrical mold and forming cylindrical molds of different diameters, thus enabling the production of carbon fiber cylindrical parts of different diameters.

[0020] 2. Several sets of racks are arranged in a cross pattern to support the cylindrical mold from multiple directions, so that the cylindrical mold is subjected to balanced force and is not easily deformed.

[0021] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0022] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the telescopic component of the carbon fiber cylindrical part production equipment of the present invention; Figure 2 This is a top view of the carbon fiber cylindrical component manufacturing equipment of the present invention; Figure 3 This is a front sectional view of the carbon fiber cylindrical part production equipment of the present invention.

[0023] In the diagram: 1. Rack assembly; 11. Rack; 12. Limiting block; 13. Support plate; 14. First rack assembly; 15. Second rack assembly; 2. Gear; 21. Rotating shaft; 3. Support tube; 4. Mounting bracket; 41. Fixed cover plate; 42. Fixed base plate; 44. Edge mounting rod; 5. Fixed seat; 51. Base; 52. Support column; 6. Cylindrical mold; 7. Carbon fiber preform.

[0024] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0026] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] This invention proposes a method such as Figure 1 The telescopic components of the carbon fiber cylindrical component production equipment shown are as follows: Figure 2 , Figure 3 The production equipment shown includes a telescopic component, which is a device that can support cylindrical molds 6 of different diameters and prevent the diameter of cylindrical molds 6 from shrinking.

[0029] This invention proposes a method such as Figures 1 to 3 The telescopic assembly of the carbon fiber cylindrical part manufacturing equipment shown includes: At least one rack group 1, the rack group 1 having two parallel and spaced racks 11, and the teeth of the two racks 11 being arranged opposite to each other; Gear 2 is disposed between two racks 11 in the same rack group 1, and gear 2 meshes with the two racks 11 respectively. When gear 2 rotates, it drives the two racks 11 to move in opposite directions.

[0030] Rack 11 refers to a long strip of metal that extends in a straight line and has teeth on one side.

[0031] The teeth on the circumferential sidewalls of the gear mesh with the rack 11, and are preferably also made of metal. A lubricant can be used for lubrication between them. It is best to use a high-temperature resistant lubricant to cope with the high temperatures during the high-temperature curing of the carbon fiber components.

[0032] The telescopic component supports the cylindrical mold 6. In use, the cylindrical mold 6 is placed inside the carbon fiber preform 7, and then the telescopic component is placed inside the cylindrical mold 6. The axial direction of the gear 2 in the telescopic component is the same as the central axial direction of the cylindrical mold 6. After the telescopic component extends and retracts through the rack 11 to support the cylindrical mold 6 to a predetermined diameter, the carbon fiber preform 7, the cylindrical mold 6, and the telescopic component are placed together in a curing device for high-temperature curing. After curing, the carbon fiber preform, the cylindrical mold 6, and the telescopic component are removed together, and the telescopic component and the cylindrical mold 6 are removed from the carbon fiber preform, thus completing the basic construction of the carbon fiber preform.

[0033] The cylindrical mold 6 can use rolled thin steel sheets. When the telescopic component extends, the rolled thin steel sheet is supported and its diameter increases. When it is necessary to produce carbon fiber parts with smaller diameters, the rolled thin steel sheet can simply be rewound into a smaller diameter roll. This achieves variable circumference of the cylindrical mold 6 at a lower cost.

[0034] Preferably, the steel coil used in the cylindrical mold 6 has a thickness of about 1 mm, which can ultimately achieve an adjustment range of 640 mm to 1100 mm in diameter.

[0035] In this invention, the same gear 2 simultaneously controls the synchronous reverse movement of two racks 11 in a rack set 1. When the two racks 11 move from overlapping to moving away from each other in their extension direction, the total length of the two racks 11 elongates; when the two racks 11 move from moving away from each other to overlapping in their extension direction, the total length of the two racks 11 shortens. By controlling the different movement directions of the racks 11 through the forward and reverse rotation of the gear 2, the elongation and shortening of the total length of the racks 11 can be controlled, thereby supporting the cylindrical mold 6 to form different diameters and realizing the production of carbon fiber parts of different diameters.

[0036] Preferably, the two racks 11 of the rack assembly 1 are of equal length and have the same tooth specifications.

[0037] When gear 2 rotates, the two racks 11 of the same rack group 1 move symmetrically, which can make the movement of rack 11 more stable.

[0038] As an embodiment of the present invention, the telescopic component includes a plurality of rack groups 1, which are arranged crosswise and respectively mesh with the same gear 2; With only one set of racks 1, when the telescopic component supports the cylindrical mold 6, the cylindrical mold 6 is only subjected to force at two points and only along a straight line. This causes the cylindrical mold 6 to be subjected to uneven force when it expands under support or when the carbon fiber preform 7 contracts, resulting in the cylindrical mold 6 becoming an ellipse or other non-circular shape, which affects the shape of the final carbon fiber part.

[0039] In this embodiment, by setting multiple sets of racks 1 along the intersecting directions, the cylindrical mold 6 is subjected to forces at multiple angles, so that the cylindrical mold 6 can maintain a perfect circular shape to the maximum extent and improve the yield of carbon fiber cylindrical parts.

[0040] Preferably, the telescopic component includes two sets of racks 1, which are arranged perpendicularly to each other.

[0041] By supporting the cylindrical mold 6 in two mutually perpendicular directions, the number of rack assemblies 1 can be minimized, and deformation of the cylindrical mold 6 can be avoided as much as possible.

[0042] Specifically, the telescopic assembly includes a first rack group 14 and a second rack group 15 perpendicular to the extending direction of the racks 11 of the first rack group 14. When the gear 2 rotates, the two racks 11 of the first rack group 14 rotate simultaneously, and the two racks 11 of the second rack group 15 rotate synchronously, supporting the cylindrical mold 6 in two mutually perpendicular directions to ensure that the cylindrical mold 6 is subjected to balanced forces.

[0043] Furthermore, the rack 11 of the first rack group 14 and the second rack group 15 can have the same specifications and be used to produce carbon fiber cylindrical parts with a circular cross section; the length and tooth density of the rack 11 of the first rack group 14 and the second rack group 15 can also be different and be used to produce carbon fiber cylindrical parts with an elliptical cross section.

[0044] As one embodiment of this invention, several sets of rack groups 1 are arranged in layers along the axial direction of gear 2, and there is a gap between adjacent rack groups 1.

[0045] The gear 2 has a certain length in its own axial direction, and several sets of rack groups 1 can be set along its extension direction.

[0046] In this embodiment, by arranging different rack groups 1 in layers, the rack groups 1 can be made to prevent interference between each other. Setting intervals between the rack groups 1 can prevent friction and jamming between them.

[0047] Furthermore, the gear 2 is positioned in the middle of the rack assembly 1.

[0048] The gear 2 is set at the center of symmetry of each rack group 1. When the gear 2 rotates, the racks 11 of each rack group 1 can move synchronously and extend or shorten in all directions by the same length. This ensures that the axis of the gear 2 is always on the axis of the cylindrical mold 6, so that the telescopic component and the cylindrical mold 6 can be subjected to uniform force, and avoid damage to the cylindrical mold 6 or the telescopic component due to uneven force.

[0049] As another embodiment of the present invention, such as Figure 2 , Figure 3As shown, the telescopic assembly has a mounting frame 4, which includes a central mounting rod and two edge mounting rods 44 arranged on both sides of the central mounting rod, spaced apart from and parallel to the central mounting rod. The central mounting rod and the edge mounting rods 44 are arranged in the same plane. Two parallel grooves are formed between the middle mounting rod and the edge mounting rod 44, and the two racks 11 of the rack assembly 1 are slidably disposed in the two parallel grooves respectively; The intermediate mounting rod is divided into two ends, and the gear 2 is disposed between the two ends of the intermediate mounting rod.

[0050] To allow the rack 11 to slide between the intermediate mounting rod and the edge mounting rod 44, while the intermediate mounting rod and the edge mounting rod 44 can also limit the rack 11, there should be a small gap between the rack 11 and the intermediate mounting rod and the edge mounting rod 44, preferably 0.4 mm.

[0051] In this embodiment, two parallel and spaced grooves are formed by the middle mounting rod and the edge mounting rod 44. The two racks 11 of the rack assembly 1 are placed in the grooves. The middle mounting rod and the edge mounting rod 44 can limit and guide the racks 11, preventing the racks 11 from displacing outside their extension direction or even changing their extension direction, thus improving the stability of the telescopic assembly.

[0052] Furthermore, both the intermediate mounting rod and the edge mounting rod 44 can be detachably mounted on the mounting bracket 4, for example, using screws or rivets. The positions of the intermediate mounting rod and the edge mounting rod 44 can be adjusted along the direction perpendicular to the extension of the rack 11, so as to adjust the gap between the intermediate mounting rod and the edge mounting rod 44 and the rack 11, avoiding excessive gap causing the rack 11 to wobble or excessive gap causing the rack 11 to jam.

[0053] As one implementation method of this embodiment, such as Figure 1 As shown, the mounting bracket 4 includes a fixed base plate 42 disposed below the strip mounting component for mounting the strip mounting component, and a fixed cover plate 41 disposed above the strip mounting component and abutting against the upper surface of the strip mounting component. The gear 2 is rotatably disposed between the fixed base plate 42 and the fixed cover plate 41.

[0054] The fixed base plate 42 can be connected to the intermediate mounting rod and the edge mounting rod 44 with screws. The fixed cover plate 41 can be connected to the intermediate mounting rod and the fixed base plate 42 with screws at the same time, or it can be fastened to the fixed base plate 42 alone.

[0055] Specifically, the fixed base plate 42 includes a central circular cover plate and a rack cover plate. The central circular cover plate is coaxially connected to the gear 2 and is equipped with a bearing. The gear 2 is rotatably connected to the bearing. The rack cover plate covers the extended rack 11, thereby fully covering the rack 11 and the gear 2. This avoids external interference with the operation of the rack 11 and prevents operators from directly contacting the gear 2 and rack 11, thus protecting the operators.

[0056] As another embodiment of this invention, the telescopic assembly includes a rack positioning member (not shown in the figure), which is detachably mounted on the rack 11 and can abut against the gear 2 or the mounting bracket 4.

[0057] The rack positioning component can be a part with teeth on at least one side, and the teeth of the part can mesh with the teeth of the rack 11. When the rack limiting component is placed on the rack 11 and meshes with the rack 11, and the other side of the rack limiting component abuts against the gear 2 or the mounting bracket 4, the rack 11 can be fixed and prevented from moving. In this way, the rack 11 locks the gear 2, thereby locking the telescopic movement of the entire telescopic assembly.

[0058] When the carbon fiber preform 7 is cured at high temperature, it will shrink, which will cause the cylindrical mold 6 to have a tendency to shrink radially. This will cause the shrinkage component to be subjected to a force along the extension direction of the rack 11, causing the telescopic component to shrink.

[0059] In this embodiment, by setting a rack fixing member, the rack 11 is locked, and then the gear 2 is locked, so as to avoid the deformation of the carbon fiber cylindrical part caused by the contraction of the telescopic component during high temperature curing.

[0060] As another embodiment of the present invention, such as Figure 1 , Figure 2 As shown, the end of the rack 11 has a limiting block 12, which extends from the end of the rack 11 in the direction of the orientation of the teeth of the rack 11.

[0061] Preferably, a limiting block 112 is provided on each of the two racks 11, and is respectively located at both ends of the rack 11 in the extension direction.

[0062] In this embodiment, gear 2 can rotate in both the forward and reverse directions, making it difficult to avoid rotating in the wrong direction during use. A limiting block 112 is provided at the end of rack 11 to restrict the movement direction of the other rack 11, preventing incorrect rotation when using the telescopic assembly to support the cylindrical mold 6. Especially when using a power tool with a torque limit to remove the telescopic assembly from the cylindrical mold 6, the limiting block 112 can cause rack 11 to reset and stop directly when it returns to its shortest length, preventing the telescopic assembly from extending in the opposite direction and supporting the cylindrical mold 6 again.

[0063] As one implementation method of this embodiment, such as Figure 3 As shown, the telescopic assembly includes a support plate 13 connected to the end of the rack 11 and extending along the axis of the gear 2.

[0064] The support plate 13 is in direct contact with the inner peripheral sidewall of the cylindrical mold 6 and is used to support the cylindrical mold 6.

[0065] Preferably, the support plate 13 is fixedly connected to the limiting block 112 on the end of the rack 11.

[0066] In this embodiment, by setting the support plate 13 to extend along the axis of the gear 2, the support surface for the cylindrical mold 6 is increased, which avoids uneven force on the cylindrical mold 6 in the axial direction and causes the diameter of the cylindrical mold 6 to be different in the axial direction.

[0067] As another embodiment of the present invention, such as Figure 3 As shown, the telescopic assembly includes a mounting frame 4, the gear 2 is rotatably connected to the mounting frame 4, the gear 2 extends along the axial direction with a rotating shaft 21, and the telescopic assembly includes a support tube 3 sleeved on the rotating shaft 21 and rotatably abutting against the side wall of the rotating shaft 21, the support tube 3 being fixedly connected to the mounting frame 4.

[0068] The rotating shaft 21 passes through the fixed cover plate 41 and the fixed base plate 42 and extends along the axial direction of the gear 2. One end of the support tube 3 is fixedly connected to the mounting bracket 4, and the other end extends in the same direction as the rotating shaft 21.

[0069] Specifically, the rotating shaft 21 extends to both ends along the axial direction of the gear 2, and the support tube 3 includes two sections, which are respectively connected to the fixed base plate 42 and the fixed cover plate 41, and extend along the direction of the rotating shaft 21 at both ends.

[0070] In this embodiment, a support tube 3 is provided for the rotating shaft 21, which can limit the rotation of the shaft 21 and prevent violent vibration when the gear 2 rotates. Especially when using a power tool to control the rotation of the gear 2, the speed and torque are high, and the support tube 3 can effectively reduce vibration.

[0071] Furthermore, the end of the rotating shaft 21 is configured to be compatible with general power tools, such as a square or a regular hexagon, so that it can be rotated directly using an electric wrench.

[0072] The rotating shaft 21 can protrude from the support tube 3 for easy rotation; or it can be completely concealed inside the support tube 3, so that the electric wrench can be inserted into the support tube 3 during use.

[0073] Furthermore, the rotating shaft 21 and the support tube 3 are provided with mutually cooperating positioning pin holes (not shown in the figure), and the telescopic assembly includes a positioning pin that can be inserted into the positioning pin hole to fix the rotating shaft 21 and the support tube 3 to each other.

[0074] After the telescopic assembly extends to the required length, the gear 2 is locked by rotating the shaft 21 and the positioning pin hole on the support tube 3 to prevent the telescopic assembly from shrinking and affecting the diameter of the carbon fiber cylindrical part.

[0075] The present invention also proposes a method such as Figure 2 , Figure 3 The carbon fiber cylindrical component production equipment shown uses the telescopic component of the present invention. The carbon fiber cylindrical component production equipment also includes a fixed base 5 and a cylindrical mold 6 with a retractable circumference. The telescopic component is disposed on the fixed base 5, and the cylindrical mold 6 is sleeved on the telescopic component, with the direction of the rack 11 of the telescopic component being the same as the radial direction of the cylindrical mold 6. When the gear 2 of the telescopic component rotates, it drives the rack 11 to move in opposite directions and extend. The rack 11 supports the cylindrical mold 6, making the diameter of the cylindrical mold 6 larger. When the gear 2 rotates in the opposite direction, it drives the rack 11 to move in opposite directions and shorten. The cylindrical mold 6 loses the supporting effect of the telescopic component and its diameter becomes smaller.

[0076] Specifically, the base 51 is cross-shaped with four legs, which are arranged horizontally and intersect in a cross shape. There are four support columns 52, one end of which is connected to each of the four legs, and the other end of which is connected to the fixed base plate 42 of the telescopic assembly.

[0077] The telescopic component is separately disposed from the cylindrical mold 6, and the telescopic component can be removed from the cylindrical mold 6 at any time.

[0078] In use, first place the cylindrical mold 6 into the carbon fiber preform 7, then vertically mount the carbon fiber preform 7 along with the cylindrical mold 6 onto the telescopic assembly. Rotate the gear 2 of the telescopic assembly to extend it to the set length, thus supporting the cylindrical mold 6. Place the carbon fiber preform 7, along with the cylindrical mold 6, the telescopic assembly, and the fixing base 5, into a high-temperature curing device to cure the carbon fiber preform 7. After curing, remove the preform and detach the cured carbon fiber cylindrical component, completing the production of the carbon fiber cylindrical component.

[0079] In this invention, the cylindrical mold 6 is supported by a telescopic component to obtain cylindrical molds 6 of different diameters, thereby enabling the production of carbon fiber cylindrical parts of different diameters without changing the cylindrical mold 6, which greatly saves the cost of manufacturing cylindrical molds 6 of different diameters.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A production equipment for carbon fiber cylindrical parts, characterized in that: include: Telescopic components, a fixed base (5), and a cylindrical mold with a retractable circumference (6). The telescopic assembly is mounted on the fixed base (5) and includes: Several sets of racks (1), each set of racks (1) has two parallel and spaced racks (11), and the teeth of the two racks (11) are arranged opposite to each other. The end of the rack (11) has a limiting block (12), which extends from the end of the rack (11) toward the direction of the teeth of the rack (11). Gear (2) is set between two racks (11) in the same rack group (1), and gear (2) meshes with the two racks (11) respectively. When gear (2) rotates, it drives the two racks (11) to move in opposite directions. The several rack groups (1) are arranged crosswise, and they mesh with the same gear (2) respectively. The cylindrical mold (6) is fitted onto the telescopic assembly, and the direction of the rack (11) of the telescopic assembly is the same as the radial direction of the cylindrical mold (6); When the gear (2) of the telescopic component rotates, it drives the rack (11) to move in opposite directions and extend. The rack (11) supports the cylindrical mold (6) and makes the diameter of the cylindrical mold (6) larger. When the gear (2) rotates in the opposite direction, it drives the rack (11) to move in opposite directions and shorten. The cylindrical mold (6) loses the supporting effect of the telescopic component and its diameter becomes smaller. The cylindrical mold (6) includes a rolled thin steel sheet. When the telescopic component extends, the rolled thin steel sheet receives a larger diameter from the top support. When it is necessary to produce carbon fiber parts with a smaller diameter, the rolled thin steel sheet is rewound into a roll with a smaller diameter.

2. The carbon fiber cylindrical component manufacturing equipment according to claim 1, characterized in that: The telescopic component also includes: Mounting bracket (4), the gear (2) is rotatably connected to the mounting bracket (4), the gear (2) extends along the axial direction with a rotating shaft (21), the telescopic component includes a support tube (3) sleeved outside the rotating shaft (21) and rotatably abutting against the side wall of the rotating shaft (21), the support tube (3) is fixedly connected to the mounting bracket (4); The rack positioning component is detachably mounted on the rack (11) and can abut against the gear (2) or the mounting bracket (4); The rotating shaft (21) and the support tube (3) are provided with mutually cooperating positioning pin holes. The telescopic assembly includes a positioning pin that can be inserted into the positioning pin hole, which is used to fix the rotating shaft (21) and the support tube (3) to each other.

3. The carbon fiber cylindrical component production equipment according to claim 1, characterized in that: The telescopic assembly includes two sets of racks (1), which are arranged perpendicularly to each other.

4. The carbon fiber cylindrical component manufacturing equipment according to claim 1, characterized in that: The several sets of racks (1) of the telescopic assembly are arranged in layers along the axis of the gear (2), and there is a gap between adjacent racks (1).

5. The carbon fiber cylindrical component manufacturing equipment according to claim 1, characterized in that: The gear (2) of the telescopic assembly is located in the middle position of the rack assembly (1).

6. The carbon fiber cylindrical component manufacturing equipment according to claim 1, characterized in that: The mounting frame (4) of the telescopic component includes a central mounting rod and two edge mounting rods (44) arranged on both sides of the central mounting rod, spaced apart from and parallel to the central mounting rod. The central mounting rod and the edge mounting rods (44) are arranged in the same plane. Two parallel grooves are formed between the middle mounting rod and the edge mounting rod (44), and the two racks (11) of the rack assembly (1) are slidably arranged in the two parallel grooves respectively; The intermediate mounting rod is divided into two sections, and the gear (2) is disposed between the two sections of the intermediate mounting rod.

7. The carbon fiber cylindrical component manufacturing equipment according to claim 6, characterized in that: The mounting bracket (4) includes a fixed base plate (42) disposed below the strip mounting piece for mounting the strip mounting piece, and a fixed cover plate (41) disposed above the strip mounting piece and abutting against the upper surface of the strip mounting piece. The gear (2) is rotatably disposed between the fixed base plate (42) and the fixed cover plate (41).

8. The carbon fiber cylindrical component manufacturing equipment according to claim 1, characterized in that: The telescopic assembly includes a support plate (13) that is connected to the end of the rack (11) and extends along the axis of the gear (2).

9. The carbon fiber cylindrical component manufacturing equipment according to claim 8, characterized in that: The support plate (13) is fixedly connected to the limiting block (12) at the end of the rack (11).

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