New Mechanism Used in Standing Wheelchair

Abstract: It is inevitable for any country to have people with disabilities or have trouble with standing up, especially arthritis patients. The most common used devices for disabled people are wheelchairs. What’s more, the life quality of disabled people and patients has caught attention by society. Modernized wheelchair has become a popular engineering challenge for decades. We aimed to design a new mechanical system in wheelchair to help people stand up, this mechanism should be safer, simpler in structure, less power consuming and more economic. A parallelogram structure was designed for wheelchair to fit the natural human standing posture. Springs installed at two nonadjacent vertexes can accumulate energy. A motor with less power and cheaper prices is reasonable, energy-saving and easily provide the power to lift up. After research and calculation, this parallelogram structure reduced almost 45% power compared with pure motor drive one. And the effort of every part can well support human’s body to form a natural and comfortable process. The standing wheelchair we designed may help people with disability to surge self-esteem; reach objects placed high, deliver speech on podium. By the way, it’s boring for a person to sit for long time.