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Abstract(s)
Os centros urbanos são caraterizados pela elevada densidade populacional e pela centralização da atividade comercial e financeira. Uma vez que estes parâmetros tendem a aumentar, outros, como a mobilidade, tendem a sofrer alterações. Isto acontece porque é necessário transportar mais pessoas num menor espaço, e mais rapidamente. Por isso, veículos como os automóveis têm vindo a perder popularidade nas cidades, acrescentando ainda o facto das crescentes restrições à poluição. Com isto, outros meios de transporte têm vindo a ganhar terreno, como é o caso das bicicletas, por ocuparem pouco espaço e permitirem às pessoas deslocar-se facilmente e de forma socialmente mais responsável e sustentável. Como complemento a este veículo, podem ser usadas cadeiras porta-bebés, que permitem assim aumentar a capacidade deste meio de transporte. Este acessório pode ser usado para tarefas do dia a dia, como levar os filhos para a escola, ou para atividades de lazer. Atualmente, no mercado, é possível encontrar vários tipos de cadeira porta-bebés, com diferentes modos de fixação à bicicleta. Este trabalho centra-se nas cadeiras de fixação ao seat tube (tubo do selim) do quadro da bicicleta. As soluções apresentadas pelo mercado são muito semelhantes e apresentam como principal desvantagem a demora na montagem/desmontagem do sistema, ou a necessidade de andar sempre com parte do sistema montado na bicicleta, o que pode incomodar visualmente o utilizador ou o obrigue a transportar peso desnecessariamente. Por forma a resolver este problema foi desenvolvido um novo sistema de fixação da cadeira à bicicleta. Após uma interiorização dos conceitos, requisitos e necessidades do mercado, foi realizado o desenvolvimento de um novo sistema utilizando um método iterativo, para convergência numa solução considerada ótima. Assim, foi obtido um sistema de fixação da cadeira porta-bebé que reúne as condições de segurança requeridas pelos padrões atuais, e que permite a montagem e desmontagem de todo o sistema de forma simples e rápida.
Urban centers are characterized by high population density and centralization of commercial and financial activity. Since these parameters tend to increase, others, such as mobility, tend to change. This is because it is necessary to transport more people in a smaller space and faster. As a result, vehicles such as automobiles have been losing popularity in cities, adding to the fact that there are increasing restrictions on pollution. As a result, other means of transport have been gaining market share, such as bicycles, because they take up little space and allow people to move easily and less environmental burden. As a complement to the bicycle, baby carrier seats can be attached, thereby increasing its capacity. These baby bicycle seats can be used for everyday tasks such as taking children to school or for leisure activities. Currently on the market it is possible to find various types of baby seats, with different ways of attachment to the bicycle. This work focuses on the seat frames that attach to the seat tube of the bicycle frame. The present solutions on the market are very similar and have as their main disadvantage the delay in the assembling / disassembling of the system, or the need to always ride with part of the system mounted on the bike, which can visually bother the user or carrying unnecessary extra weight. In order to solve this problem, a new system for attaching the baby seat to the bicycle was developed. After internalizing the concepts, requirements and needs of the market, a new system was developed using an iterative method, to converge on a solution considered to be optimal. Thus, it was obtained a system for fixing the baby seat that meets the safety conditions required by current standards and that allows the assembly and disassembly of the entire system in a simple and quick way.
Urban centers are characterized by high population density and centralization of commercial and financial activity. Since these parameters tend to increase, others, such as mobility, tend to change. This is because it is necessary to transport more people in a smaller space and faster. As a result, vehicles such as automobiles have been losing popularity in cities, adding to the fact that there are increasing restrictions on pollution. As a result, other means of transport have been gaining market share, such as bicycles, because they take up little space and allow people to move easily and less environmental burden. As a complement to the bicycle, baby carrier seats can be attached, thereby increasing its capacity. These baby bicycle seats can be used for everyday tasks such as taking children to school or for leisure activities. Currently on the market it is possible to find various types of baby seats, with different ways of attachment to the bicycle. This work focuses on the seat frames that attach to the seat tube of the bicycle frame. The present solutions on the market are very similar and have as their main disadvantage the delay in the assembling / disassembling of the system, or the need to always ride with part of the system mounted on the bike, which can visually bother the user or carrying unnecessary extra weight. In order to solve this problem, a new system for attaching the baby seat to the bicycle was developed. After internalizing the concepts, requirements and needs of the market, a new system was developed using an iterative method, to converge on a solution considered to be optimal. Thus, it was obtained a system for fixing the baby seat that meets the safety conditions required by current standards and that allows the assembly and disassembly of the entire system in a simple and quick way.
Description
Keywords
Cadeira porta-bebé Sistema de fixação Desenvolvimento de produto Método dos elementos finitos. Baby bike seat Fastening system Product development Finite Element Method