The Structure Design And Research Of Multi—Function Wheelchair

With the more and more severe influence of aging and the increasing number of disabled man, the demands of the handicapped for aid walk instruments is increasing. Therefore, it is urgent to develop a new type, safe and reliable, economical indoor moving rehabilitation system for handicap. This system has many functions such as driving motion function, lower limbs rehabilition function and fetching high things etc. It can solve the problems for handicap in daily life and improve their life quality.After defining function of multi-function wheelchair, the dimension of wheelchair has been design based on human biomechanics and principle of designing chair. This system uses conceptual to design method, solid modeling, virtual assembly in virtual design software Pro/E, and then check assembly interference with the help of Pro/E Mechanism Kinematics simulation function.This paper takes the dynamic simulation tool Simulink of MATLAB as a platform, uses vector equation Method, establishes a simulation model for kinematic analysis on the upper limb lifting mechanism、seat retracting mechanism、pedal folding/unfolding mechanism, and executes the simulation after all parameters are set. The result shows that such simulation can help to conveniently and accurately get the motion parameters of the mechanism, so that reference can be provided for designing of this mechanism. The motion parameters such as ramp angle and obstacle height have been checked after choosing pivotal parts, for example, electric engine and electric push rod. The result accords to the national standard of indoor moving rehabilitation system.The seat frame, the rotating frame and the outside frame of the multi-function wheelchair have been carried out static analysis by using ANSYS finite element analysis technology, examined their Von Mises contour and the total deformation of structure, conducted a comprehensive strength、stiffness analysis to determine the safety and durability of components under allowable conditions of the largest stress and strain, determined whether the components meet the design requirements in order to test the design is reasonable.