Manufacturing method of bicycle pedal crankset

Abstract

The invention discloses a bicycle pedal crank group manufacturing method. The method comprises the steps that a circular crank shaft section and an elliptical crank section are formed after aluminum circular tubing is drawn, bent and forged, the part between the crank shaft section and the crank section is an integrally connected L shape, a tube plug is fixedly inserted into the outer end of the crank section, a shaft connecting part is molded at the circumferential edge of the outer end of the crank shaft section through punching, a group connecting hole is formed in the part, corresponding to the tube plug, of the outer end of the crank section, and therefore a crank group is formed. The method has the advantages that the integral assembly combination is simpler and more convenient, thestructural strength of the crank group can be effectively improved to withstand severer and frequent vibration impacting force, the integral weight can be reduced, a bicycle is lighter, the overall appearance streamline and attractiveness of the crank group can be improved, consumers are attracted to purchase to a further extent, the industrial competitiveness is improved, and practicability of the integral use of the bicycle is improved.

Description

technical field [0001] The present invention relates to a method for manufacturing a bicycle pedal crankset, in particular to a method that is not only more simple and convenient in the overall assembly and combination, but also can effectively improve its structural strength to withstand large and frequent vibration impact forces, and It can reduce the overall weight, make the bicycle lighter, and increase the streamline and aesthetics of the overall appearance of the crankset, so as to attract consumers to buy and enhance the competitiveness of the industry. Enhanced utility properties. Background technique [0002] Bicycle is a very convenient means of transportation. It uses the power of both feet to step on it to move forward. It not only has the effect of fitness, but also is an excellent tool for leisure sports. It saves energy consumption, has environmental protection effects, and bicycles are slower and safer to use. For students who are too young to ride motorcycl...

AI Technical Summary

Problems solved by technology

[0004] However, although the above-mentioned crank can be assembled on the bicycle to achieve the expected effect that the user can move the bicycle by stepping on the assembled pedals, it is also found that the crank and the crank shaft are not connected in actual operation and use. Due to the use of connecting parts for assembly and combination, it is not only cumbersome and inconvenient to assemble as a whole, but also the joint between the crank and the crank shaft is relatively weak in structural strength, and is prone to breakage and damage. , will increase its overall weight and affect the lightweight of the bicycle, resulting in room for improvement in its overall structural composition

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