| Summary: | 碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 103 === The purpose of this thesis is improving the rollator to bring users more safe and larger space to use. There are two points of the improvement: one is the brake; another is the wheel. The group of users of rollators are elderly and disabled people. They not have only bad reflexes but also weak hands. In order to make them use the brake easily, a rod twisting the variable resistor replaces original way to drive the brake, and the brake should use the electromagnetic brake. Also, there is a aid-brake to prevent the rollator slide at the ramp. Besides, the most common problem of rollators is the difficulty of climbing obstacles. Therefore, this thesis present a method of foldable wheels to solve this problem. They make the rollator move easily like normal wheel does, and climb obstacles or steps at the same time. After searching documents about rollators, it shows that there is lack of analysis about brake and climbing ability of rollators. Therefore, we consult the analysis of bicycle brake to analyze the brake of rollators. At first, we build a model of the rollator. Then, calculate the maximum braking force of front wheels and rear wheels without overturning and locking. Finally, according to the demands, we could get proper electromagnetic brake force and aid-brake force. We consult the analysis of climbing ability of mobile robots to analyze the foldable wheels of the rollator. We figure out each height of different foldable wheels could climb. At last, these foldable wheels designed in this thesis will be compared by the standards of folding steps, volume, maximum width, and maximum climbing height. The design of the electromagnetic brake in this thesis is easy to use than original one, and makes the rollator not get too fast at ramp with the aid-brake. Besides, the foldable wheels make the rollator climbs obstacles, such as steps, also bring the users of the rollators larger space to use. Most of all they make the rollator move easily like normal wheel does by their foldable structure.
|
|---|
