Mechanical Design of a Wheelchair with Multi-Posture Characteristics

At present, an electrical wheelchair cannot meet the needs of patients, like paralyzed patients, who spend most of their time on beds. This paper presents a mechanical design of a wheelchair which can transform to a sitting, lying and standing posture. The standing posture can help patients to reach high place and do exercise. The patients can have rest on it when the wheelchair is lying. In addition, we modeled and simulated the mechanical structure to ensure the reasonableness of the design. Vector equation analytical method is used to conduct kinematic analysis to obtain accurate kinematic properties of structural parts throughout the posture change.