Integrally-formed carbon fiber spoke and preparation method thereof

Abstract

The invention discloses an integrally-formed carbon fiber spoke and a preparation method thereof. A carbon fiber core body and a first metal piece and a second metal piece at the two ends of the spoke are prepared, the centers of the two metal pieces are provided with axial through holes, the through holes are matched with the carbon fiber core body, and the end of the first metal piece is provided with an annular boss; the carbon fiber core body penetrates through the through holes of the first metal piece and the second metal piece, and the first metal piece and the second metal piece are arranged at the two ends of the carbon fiber core body; the carbon fiber core body and the metal pieces at the two ends are wound and coated by using the carbon fiber prepreg to form a semi-finished product; and the wound and coated semi-finished product is putted into a forming mold for heating and forming. The metal pieces are wound and coated by the carbon fiber prepreg so that a sandwich structure is formed between the metal pieces and the carbon fiber material to enlarge the bonding interface between the spoke body and the inner and outer surfaces of the metal pieces at the two ends, the bonding force between the spoke body and the metal pieces at the two ends is greatly improved, and it is ensured that the spoke body and the metal pieces cannot slip off.

Description

technical field [0001] The invention discloses an integrally formed carbon fiber spoke and a preparation method thereof, and belongs to the technical field of wheel spoke manufacture according to the International Patent Classification (IPC). Background technique [0002] In cycling competitions, bicycle equipment is a very important factor affecting athletes' performance. The weight, stiffness, strength, and geometry of bicycle components are some of the most important factors affecting speed. The lighter the weight, the faster the speed; the better the rigidity, the more efficient the energy conversion. [0003] In a bicycle system, the spokes are the bridge that connects the rim to the hub. During use, one end of the spoke with a cap head is connected to the hub, and the other end with screw teeth is locked with the spoke cap and connected to the rim. When the bicycle is running, all the load-bearing pressure is provided by the tension generated by the spoke assembly o...

AI Technical Summary

Problems solved by technology

However, due to this design, diameter-expanding sections are provided at both ends of the carbon fiber strip, so that the two joints basically cannot be sleeved on the carbon fiber strip after the carbon fiber strip is made, so the scheme is almost inoperable

Taking a step back, even if the joint can be sleeved on the carbon fiber strip, the process and cost of opening a cavity for the supporting member in the enlarged diameter section of the thinner carbon fiber strip are quite difficult and the cost is very high

Therefore, this solution requires high technology, complex mold making, low manufacturing efficiency, inconvenient assembly, high manufacturing cost, and is basically not suitable for industrial production.

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