Design And Research Of Bionic Cushioning Functional Shoes Based On Mast-Type Octahedral Tensegrity Structure

With the deepening of scientific research,people have found that the foot structure has the effect of cushion-damping and anti-tension.But in daily life,feet are at great risk of injury all the time,especially foot injuries,which almost all of us have experienced.In order to prevent foot injury,a sports shoe with stronger protection for the foot is just what we need.In this paper,the foot is taken as the research object,and the tetrahedral structure features are extracted from the human foot.According to the tetrahedral structure,the wearable structure of the foot and ankle joint,the wearable structure of the toe and metatarsal joint and the tensioned tetrahedral plantar structure are designed.The main contents of this paper are as follows: Firstly,external features such as the ankle joint of the human foot are extracted to simplify the basic structure of the foot.Their bones,joints,ligaments,muscles and tendons,soft tissues around the sole of the foot and the arch of the foot were extracted.The three-dimensional simplified diagram of the human foot is constructed by simplifying,and the tetrahedral structure is extracted according to the characteristics of the foot and the force analysis.Secondly,the ankle joint structure with plantarflexion,dorsiflexion,varus and valgus degrees of freedom is developed from the perspective of reproducing the functionality of the biological mapping model of the human foot.In order to verify the humanoid characteristics of the proposed structure,the three-dimensional capture system is used to collect the motion trajectory of each node under the walking gait cycle in real time,and compared with the standardized data to verify its walking compliance ability similar to that of the human body.Based on the verification of the correctness of the structure,the universal joint,ratchet bracket and other embedded parts are placed outside to reserve space for human feet to wear.Based on the same arrangement of elastic components,the ankle wearable device is developed to provide users with walking assistance while avoiding lateral overturning caused by the instability of the center of gravity.Thirdly,in order to improve the gait fluency of the user during walking,the metatarsophalangeal joint design is added to the wearable device.Since the adjustable stiffness,self-recovery and self-stability of the tenseintegrity structure highly coincide with the characteristics of the metatarsophalangeal joint of the human foot,a forehand wearable device that can realize metatarsophalangeal switching is developed based on the bistable tenseintegrity structure,and the stability ability of the structure is verified by stability analysis.Based on Adams simulation software,the influence of elastic component stiffness composition on joint stiffness is verified,which can be used for users to adjust joint stiffness according to their own needs and improve the application breadth of wearable devices.Then,through the exploration of the characteristics of the human foot and the results of numerical analysis,combined with the pressure distribution of the human foot and the tetrahedral structure,a bionic sole was designed,and the modeling design was carried out by solid works.Through data analysis and calculation,find out the most suitable sports function shoes sole material.Finally,combining the three organically,the bionic shock absorption functional shoes based on mast-type tensegrity structure are designed.