Carbon fiber vehicle frame accessory and manufacturing method thereof

Abstract

The invention discloses a carbon fiber frame accessory and a manufacturing method thereof.The carbon fiber frame accessory comprises a frame accessory body made of first carbon cloth, the frame accessory body comprises a vehicle body rod piece, a front wheel rod piece and a rear wheel rod piece, the front end of the front wheel rod piece is connected with a front wheel connecting piece, the rear end of the rear wheel rod piece is connected with a vehicle rear foot piece, and the vehicle rear foot piece is connected with a rear wheel connecting piece; a first connecting base is connected to the bicycle body rod piece, a second connecting base is connected between the front wheel rod piece and the rear wheel rod piece, and the first connecting base and the second connecting base are connected to the bicycle frame auxiliary body through a whole piece of second carbon cloth in a high-temperature curing mode. The problem of stress concentration among heterogeneous materials is solved; the first carbon cloth and the second carbon cloth are synergistically cured to form a continuous fiber reinforced network, so that the interface bonding strength of the connecting seat and the frame main body is far higher than that of a traditional glue joint or mechanical connection mode, and the overall torsional rigidity is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle frame accessories, and in particular to a carbon fiber vehicle frame accessory and a manufacturing method thereof. Background Art

[0002] With the growing demand for lightweight products, carbon fiber composites, due to their high strength and low density, are becoming the preferred material for vehicle frame design. Traditional metal frames, while offering excellent mechanical properties, suffer from heavy weight and complex molding processes. Their limitations are particularly evident when balancing lightweighting with dynamic performance.

[0003] In the existing technology, carbon fiber frames usually adopt a split structural design. For example, the body rods, wheel connectors and other components are separately formed and then assembled by gluing, bolting or sleeve connection. Although this process can achieve modular production, it has the following drawbacks:

[0004] 1. Redundant connection structure: Split-type designs rely on additional connectors, which increases local weight. Furthermore, stress concentration is easily generated at the interface between heterogeneous materials, affecting the reliability of the overall structure.

[0005] 2. Low manufacturing efficiency: After multiple parts are independently molded, they need to be processed and assembled again. The process is cumbersome, and the difference in curing conditions at the joints may lead to uneven performance.

[0006] 3. Existing carbon fiber frames often utilize local reinforcement for the connectors, achieved through multiple layers of carbon cloth. Each connector requires multiple separate layers of carbon cloth, resulting in significant waste, lengthy production cycles, weak connection strength, and low production efficiency. Achieving efficient manufacturing and improved mechanical performance of lightweight frames through integrated optimization of material processing and structural design remains a pressing technical challenge in this field.

[0007] The present invention is made based on the above-mentioned situation. Summary of the Invention

[0008] The present invention overcomes the shortcomings of the prior art and provides a carbon fiber frame and a manufacturing method thereof which can prevent an indwelling catheter sheath from falling off and will not bend when the thrombolytic catheter is coiled.

[0009] The present invention is achieved through the following technical solutions:

[0010] A carbon fiber frame attachment includes a frame attachment main body made of a first carbon cloth, the frame attachment main body including a body rod and a front wheel rod and a rear wheel rod connected to the lower portion of the body rod, the front end of the front wheel rod being connected to a front wheel connecting member, the rear end of the rear wheel rod being connected to a rear foot member, the rear foot member being connected to a rear wheel connecting member, the body rod being connected to a first connecting seat, a second connecting seat being connected between the front wheel rod and the rear wheel rod, the first connecting seat and the second connecting seat being connected to the frame attachment main body through a whole piece of second carbon cloth that is cured at high temperature.

[0011] In the carbon fiber vehicle frame attachment as described above, a shaping support member is provided inside the vehicle body rod.

[0012] In the carbon fiber frame attachment as described above, the exterior of the front wheel connector is provided with threads or protrusions for enhancing the coupling force between the front wheel connector and the front wheel rod.

[0013] In the carbon fiber frame attachment as described above, the front wheel connector is provided with a first mounting hole for mounting the wheel, and the first carbon cloth is provided with a notch at a position corresponding to the first mounting hole to expose the first mounting hole.

[0014] In the carbon fiber frame attachment as described above, the rear foot piece is provided with a second mounting hole for mounting a rear wheel connecting piece.

[0015] In the carbon fiber frame attachment as described above, the upper end of the vehicle body rod is provided with a connection port.

[0016] In the carbon fiber frame attachment as described above, the first connecting seat includes a first connecting plate, first connecting blocks are provided on both sides of the first connecting plate, and first connecting holes are provided in the first connecting blocks.

[0017] In the carbon fiber frame attachment as described above, the second connecting seat includes a second connecting plate, a second connecting block is provided on one side of the second connecting plate, and a second connecting hole is provided on the second connecting block.

[0018] A method for manufacturing the above-mentioned carbon fiber frame attachment includes the following steps:

[0019] S1. Wrapping or winding the shaping support member, the front wheel connecting member, and the rear foot member with a first carbon cloth to form an integrated structure and thus form a frame-attached main body;

[0020] S2. The first connecting seat and the second connecting seat are pre-fixed on the frame attachment body as required;

[0021] S3. Use a whole piece of second carbon cloth to connect the first connecting seat and the second connecting seat to the frame attachment body, and perform high-temperature curing to form the connection seat.

[0022] In the carbon fiber frame attachment as described above, the frame attachment body is provided with a first connecting groove for positioning and connecting to the first connecting seat, and the frame attachment body is also provided with a second connecting groove for positioning and connecting to the second connecting seat.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] In this case, the frame attachment, front wheel connector, rear footrest, first connector, and second connector are constructed using an integrated carbon cloth layup design, eliminating the need for traditional split-structure metal connectors or adhesive interfaces. This eliminates stress concentration between dissimilar materials and significantly reduces excess weight. The synergistic curing of the first and second carbon cloths forms a continuous fiber-reinforced network, significantly enhancing the interface strength between the connector and the frame compared to traditional adhesive or mechanical connections, significantly improving overall torsional stiffness and fatigue life. Furthermore, this design utilizes less material than multi-layer carbon cloth laminations.

[0025] The first and second connecting seats are directly formed by high-temperature curing of the second carbon cloth and the frame body, eliminating separate manufacturing, secondary assembly and reinforcement processes, simplifying the process flow, and reducing mold costs and labor consumption; the entire second carbon cloth forms a uniform fiber distribution in the key stress-bearing area, avoiding local stress weak points and ensuring consistency of structural performance.

[0026] The continuous carbon fiber structure design of the front and rear wheel rods and body rods, combined with the rigid transition of the second carbon cloth connector, effectively disperses the vibration energy transmitted by the wheel set and reduces stress peaks. The integrated layout of the rear footrest and rear wheel connector enhances the stability of the rear wheel support, especially in high-frequency impact scenarios, and reduces the risk of microcrack initiation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0028] Figure 1 It is a structural schematic diagram of each component of the present invention;

[0029] Figure 2 It is a structural diagram of the frame and the main body in the present invention;

[0030] Figure 3 It is an exploded schematic diagram of the carbon fiber frame of the present invention;

[0031] Figure 4 It is a structural diagram of the carbon fiber frame of the present invention;

[0032] Figure 5 It is a schematic diagram of the molding process of the frame attached body in the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] like Figures 1 to 5 A carbon fiber frame attachment is shown, comprising a frame attachment body 2 made of a first carbon cloth 1. The frame attachment body 2 includes a body member 21, and a front wheel member 22 and a rear wheel member 23 connected to the lower portion of the body member 21. The front end of the front wheel member 22 is connected to a front wheel connector 3, and the rear end of the rear wheel member 23 is connected to a rear foot member 4. The front wheel connector 3 is wrapped with the first carbon cloth 1 to form an integral structure with the front wheel member 22. The rear foot member 4 is wrapped with the first carbon cloth 1 to form an integral structure with the rear wheel member 23. The rear foot member 4 is connected to a rear wheel connector 5. A first connecting seat 6 is connected to the body member 21, and a second connecting seat 7 is connected between the front wheel member 22 and the rear wheel member 23. The frame attachment body 2 is formed by high-temperature curing. The first and second connecting seats 6 and 7 are connected to the frame attachment body 2 by a single piece of second carbon cloth 8, which is also cured at high temperature.

[0035] This case adopts an integrated carbon cloth layup design. The first carbon cloth 1 and the second carbon cloth 8 are synergistically cured to form a continuous fiber-reinforced network. The frame attachment body 2 and the front wheel connector 3, the rear foot member 4, the first connecting seat 6 and the second connecting seat 7 are formed as a whole, abandoning the traditional split structure of metal connectors or adhesive bonding processes. While eliminating stress concentration of heterogeneous materials and reducing weight, it significantly improves the interface bonding strength and overall torsional rigidity; combined with the continuous carbon fiber structure of the wheel group rod and the rigid transition of the second carbon cloth 8, it effectively disperses vibration energy and stress peaks, enhances the stability of the rear wheel under high-frequency impact, and streamlines the manufacturing process through the integrated curing process, reducing mold costs and local weaknesses, and achieving dual optimization of structural performance and production efficiency.

[0036] Furthermore, a styling support member 9 is provided within the body member 21. The styling support member 9 forms a support framework within the body member 21, restraining deformation of the first carbon cloth 1 during the curing process and ensuring the appearance of the body member 21. The styling support member 9 and the first carbon cloth 1 work together to support the load, significantly improving the bending stiffness and local compressive strength of the body member 21 by optimizing the internal mechanical transmission path. This effectively reduces the risk of member buckling, particularly when the frame attachment body 2 is subjected to a lateral impact.

[0037] Furthermore, the shaping support member 9 and the rear leg member 4 are both made of foaming material, replacing the traditional metal core mold, further reducing the weight of the frame-attached main body 2.

[0038] In one embodiment, the exterior of the front wheel connector 3 is provided with threads 31 or bumps for enhancing the bond between it and the front wheel rod 22. The threads 31 or bumps form a mechanical interlocking structure with the inner wall of the carbon fiber front wheel rod 22, increasing contact area and frictional resistance, effectively distributing the axial and radial loads transmitted by the wheel set, and avoiding the risk of shear failure at a traditional planar adhesive bonded interface. The spiral orientation of the threads 31 or the array arrangement of the bumps guides the localized directional winding of the carbon fiber during layup, creating a fiber-reinforced anchoring effect after curing, thereby enhancing the connection strength. The threads 31 or bumps create multi-directional constraints under dynamic loads, suppressing micro-displacement between the front wheel connector 3 and the front wheel rod 22 and significantly reducing fatigue damage at the connection interface caused by high-frequency vibration. The threads 31 or bumps are directly integrally formed through the first carbon cloth 1 layup, eliminating the need for additional metal inserts or reinforcement structures. This reduces the weight redundancy introduced by heterogeneous materials and maintains the overall lightweight characteristics of the frame.

[0039] In one embodiment, the front wheel connector 3 is provided with a first mounting hole 32 for mounting the wheel, and the first carbon cloth 1 is provided with a notch at a position corresponding to the first mounting hole 32 to expose the first mounting hole 32. This allows the wheel shaft to be smoothly inserted into the first mounting hole 32, thereby completing the connection of the wheel set.

[0040] In one embodiment, the rear foot member 4 is provided with a second mounting hole 41 for mounting the rear wheel connector 5, and the first carbon cloth 1 is provided with a clearance opening corresponding to the second mounting hole 41 to avoid the first mounting hole 32. The rear wheel connector 5 can be a wheel axle for mounting a wheel.

[0041] In one embodiment, a connection port 210 is provided at the upper end of the vehicle body rod 21 for connecting to other components of the vehicle frame.

[0042] In one embodiment, the first connection base 6 includes a first connection plate 61, with first connection blocks 62 provided on both sides of the first connection plate 61. The first connection blocks 62 are provided with first connection holes 621. The first connection base 6 can be formed by bending or welding aluminum, and the first connection blocks 62 are symmetrically arranged on both sides of the first connection plate 61.

[0043] In one embodiment, the second connection base 7 includes a second connection plate 71, a second connection block 72 is provided on one side of the second connection plate 71, and a second connection hole 73 is provided on the second connection block 72. The second connection base 7 can be made of aluminum material by welding.

[0044] Furthermore, a second connecting seat 7 is provided at the junction of the front wheel rod 22 and the rear wheel rod 23 , and a second connecting seat 7 is provided on the side of the rear wheel rod 23 .

[0045] The present invention also discloses a method for manufacturing a carbon fiber frame attachment, comprising the following steps:

[0046] S1, wrapping or winding the first carbon cloth 1 around the shaping support 9, the front wheel connecting member 3, the rear leg member 4 and the rear wheel connecting member 5 into a forming mold to form the frame attachment body 2;

[0047] S2, the first connecting seat 6 and the second connecting seat 7 are pre-fixed on the frame attached body 2 as required. Furthermore, the frame attached body 2 is provided with a first connecting groove 24 for positioning and connecting the first connecting seat 6, and the frame attached body 2 is also provided with a second connecting groove 25 for positioning and connecting the second connecting seat 7. The first connecting seat 6 is pre-fixed at the first connecting groove 24 by a pre-formed mold, and the second connecting seat 7 is pre-fixed at the second connecting groove 25 by a pre-formed mold.

[0048] S3. Use a whole piece of second carbon cloth 8 to connect the first connecting seat 6 and the second connecting seat 7 to the frame attachment body 2. The second carbon cloth 8 is provided with through holes 80 corresponding to the first connecting block 62 and the second connecting block 72 for the first connecting block 62 and the second connecting block 72 to pass through. The whole is placed in a forming mold and cured by high-temperature heating to form a carbon fiber frame attachment.

[0049] The first and second connecting seats 6 and 7 are connected to the frame attachment body 2 via a single piece of second carbon cloth 8. This increases the contact area between the first and second connecting seats 6 and 7 and the second carbon cloth 8, thereby enhancing strength. The production process is simple and easy to operate. The thickness of the forming mold does not need to be considered, so the forming mold can be relatively thin. This allows for faster heat conduction within the forming mold, improving production efficiency and increasing the yield rate of the product.

Claims

1. A carbon fiber frame, characterized by: The invention comprises a vehicle frame attachment body (2) made of a first carbon cloth (1), the vehicle frame attachment body (2) comprising a vehicle body rod (21) and a front wheel rod (22) and a rear wheel rod (23) connected to the lower part of the vehicle body rod (21), the front end of the front wheel rod (22) being connected to a front wheel connecting member (3), the rear end of the rear wheel rod (23) being connected to a vehicle rear foot member (4), the vehicle rear foot member (4) being connected to a rear wheel connecting member (5), the vehicle body rod (21) being connected to a first connecting seat (6), a second connecting seat (7) being connected between the front wheel rod (22) and the rear wheel rod (23), the first connecting seat (6) and the second connecting seat (7) being connected to the vehicle frame attachment body (2) through a whole piece of second carbon cloth (8) through high temperature curing.

2. The carbon fiber frame according to claim 1, characterized in that: A shaping support member (9) is provided inside the vehicle body rod member (21).

3. The carbon fiber frame according to claim 1, characterized in that: The outside of the front wheel connecting member (3) is provided with a thread (31) or a bump for enhancing the coupling force between the front wheel connecting member (3) and the front wheel rod (22).

4. The carbon fiber frame according to claim 3, characterized in that: The front wheel connecting member (3) is provided with a first mounting hole (32) for mounting a wheel, and the first carbon cloth (1) is provided with a notch at a position corresponding to the first mounting hole (32) to expose the first mounting hole (32).

5. A carbon fiber frame according to any one of claims 1 to 3, characterized in that: The rear foot piece (4) is provided with a second mounting hole (41) for mounting a rear wheel connecting piece (5).

6. The carbon fiber frame according to claim 5, characterized in that: The upper end of the vehicle body rod (21) is provided with a connection port (210).

7. The carbon fiber frame according to claim 1, characterized in that: The first connecting seat (6) comprises a first connecting plate (61), first connecting blocks (62) are provided on both sides of the first connecting plate (61), and a first connecting hole (621) is provided on the first connecting block (62).

8. The carbon fiber frame according to claim 1, characterized in that: The second connecting seat (7) comprises a second connecting plate (71), a second connecting block (72) is provided on one side of the second connecting plate (71), and a second connecting hole (73) is provided on the second connecting block (72).

9. A method for manufacturing a carbon fiber frame accessory according to any one of claims 2 to 8, characterized in that: The following steps are involved: S1, wrapping or winding the shaping support member (9), the front wheel connecting member (3), and the rear foot member (4) with a first carbon cloth (1) so that the four members form an integrated structure and thus form a frame-attached main body (2); S2, the first connecting seat (6) and the second connecting seat (7) are pre-fixed on the vehicle frame attached body (2) as required; S3. Use a whole piece of second carbon cloth (8) to connect the first connecting seat (6) and the second connecting seat (7) to the vehicle frame attachment body (2), and form them by high-temperature curing.

10. The carbon fiber frame according to claim 9, characterized in that: The frame attachment body (2) is provided with a first connection groove (24) for positioning and connecting the first connection seat (6), and the frame attachment body (2) is also provided with a second connection groove (25) for positioning and connecting the second connection seat (7).

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