Projeto de um guia de corrente para montain bike utilizando manufatura aditiva

Abstract

Creativity and intelligence made man stand out over animals, but the use of manual force for various activities prevailed until the 17th century. Although the traditional means of transport was horse, the invention of a two-wheeled machine was notable for circulating in cities. Even without brakes and driven by the feet, the machine inspired builders to add pedals and thus the bicycle, tricycles and quadricycles appeared. People became healthier, women achieved emancipation in society and the bicycle took over the streets. Around 1900, competitions around the world began to emerge, in the 1970s in the United States; young people adapted their bikes to use them on off-road trails. A new cycling fashion was emerging and was about to conquer the world with mountain bikes, becoming an Olympic sport in 1996. Bicycles generally had a two to three speed system, but became two or three speeds at the front (crowns and crankshaft) and seven to ten ago (cassette or turnstiles). In the current scenario, the use is predominant with a narrow wide type gear (gear with wide and narrow teeth) in the front and 10, 11 or 12 speeds behind by cassettes (gear set). Materials of excellent quality and robustness, facilitates the quick change of gears for any cyclist, both beginner and professional. Even with these technologies, in mountain biking, there is an unpleasant occurrence of the current drop in situations of locomotion over very hilly terrain. This event can harm the rider with a fall or in the event of competition; lose several positions when getting off the bike to put the chain back in place. The need for this not to occur is the proposal of this work with the objective of designing a chain guide for additive manufacturing. In this way, it meets the specific objectives of meeting the requirements of customers looking for a light, resistant piece at an affordable price. For that, it was use as methodology proposed by Rozenfeld et al. (2006) the product development process, with phases beginning with the informational design, that defines the project requirements arising from the requirements of the customers, the conceptual design for three-dimensional visualization of the product thus demonstrating the product design. Following is the detailed design, which ends with the manufacture by additive manufacture of the chain guide enabling the first impressions of a prototype.