Design And Research On The Mechanism Of A Massage Chair Movement

People are enthusiastic about massaging machine because the sub-health become more prominent under the situation of the pressure increased in study and working.But the movement is the core of massage machines.At present,the movement on the market has the disadvantages of complicated structure,single function,poor massage adjustment ability;in the process of designing the movement,the company adopts traditional design methods which affect research and development cycle.It will not conducive to improving the competitiveness of enterprises.Aim at those problem,the function and performance parameter of the massage chair movement were obtained based on the analysis of ergonomics and traditional Chinese massage.Then,the structure was designed.Based on the modern design method,the kinematics,dynamics,and flexibility of the movement were simulated,and the statics,modes,fatigue life of critical parts,reliability of 3D axes also be analyzed.Finally,the prototype was made and tested.The main work and results as follows:(1)First,the background and significance was represented in this paper.Then,had a research and conclude about the development of massage machine both domestic and abroad.The requirement of function and performance parameter were determined by the analysis of ergonomics and traditional Chinese massage.Then carry out several mechanism schemes and screen the best one after the function decomposition.(2)After the three-dimensional modal was established,the kneading range,kneading speed,and kneading trajectory were studied when the movement performing the kneading function.The tapping speed,displacement,oscillating angle and the trajectory of massage ball were studied when the movement performing the tapping function.The stroke and angular velocity were studied when the movement performing the 3D function with the aid of virtual simulation software ADAMS.Then,a multi-parameter goal optimization was performed on the kneading range and the tapping displacement.After that,the dynamics were studied about the loading of kneading plate,the contact force of the 3D-sized gear and the loading of the 3D axis.Based on the rigid-flexible coupling model,the simulation analysis of flexibility and power consumption were performed.(3)The part was optimized whose maximum stress exceed the material yield limit in Ansys/workbench static structural;Compared the result of restraint modal analysis and frequency produced by incentive source shows that the massage machine movement was safe;The fatigue life of significant parts were analysed based on the result of static analysis,load spectrum which tested in ADAMS,and nCode designlife.Finally,considering the various random factors the reliability of 3D-axis of dangerous part was studied.(4)The performance parameters were detected after completing the prototype,and the errors between the actual measured and the theoretical optimal value were analysed.Finally,making a fatigue life test for prototype,verified the theory analysis is reasonable.