Innovative Design And Research Of Assisted Standing Wheelchair

Assisted standing wheelchair is an auxiliary medical device designed for people with poor standing ability.It has been widely used because of its significant function of improving users’ life quality.In recent years,people have put forward higher requirements for the product quality and use experience of industrial products,so the design of auxiliary standing wheelchair,which is closely related to the structural characteristics and use experience of the human body,has also put forward higher requirements.Aiming at the related problems,this paper proposes a design of an auxiliary standing wheelchair,and studies the effect of wheelchair structure and related structure on human biomechanics.The main contents of this paper are as follows:Firstly,the modular design idea is used to divide the wheelchair structure into modules,and the ergonomic calculation of the wheelchair structure involved by human body is carried out.In the structural design of the auxiliary standing module,according to the structural characteristics of the human body and the movement rules and functions of the hip joint and knee joint of the human lower limbs in the standing process,and considering the stability of the human body in the process of the mechanism assisted standing,the support position of the auxiliary standing wheelchair is planned.The support position planning was finally set as: hip joint position support and its support track is adjustable,axillary position support and hand position support.Secondly,the parameter optimization module of Adams View is used to optimize the mechanism design to minimize the maximum thrust of the mechanism.The main motion results and dynamic requirements are simulated by Adams software.The simulation results are verified by constraint approximation method and dynamic static analysis to ensure the reliability of the results.After verifying that the motion results are correct,the adjustment amount is calculated according to the motion transformation law of the hip joint in the standing process of human body in the natural state for the trajectory adjustment mechanism of the supporting point of the hip joint.Then the motion state of the auxiliary support mechanism involving the position of axillary support point was simulated.The change of the position of the mechanism and the change of the electric push rod are obtained.After completing the motion state analysis of the wheelchair,the Solidworks finite element analysis module is used for finite element analysis of the wheelchair structure and modification of part of the structure.Then the effect of hand support position on biomechanics of human upper limbs was studied with the help of Any Body analysis software,and the effect of hand support position on muscle activity intensity of human arm position and trunk position was obtained.On the basis of this analysis,the hand support structure of the assisted standing wheelchair is designed.Finally,according to the modern aesthetic characteristics,the appearance of the wheelchair was optimized.