Influence analysis for structural parameters of scissor type seat on seat’s vibration characteristics
                                        WANG Lijuan1, YAN Jianguo1, HOU Zhanfeng1, ZHANG Yong1，ZHU Jun2
(1.College of Mechanical and Electrical Engineering, Inner Mongolia Agricultural University，Hohhot 010018, China; 2.School of Electrical Engineering and
 Automation, Henan Polytechnic University,Jiaozuo 454000,China)

Abstract: Aiming at the problem of unclear influence of scissor type seat suspension structural parameters on its vibration characteristics, the relationship between structural parameters and vibration characteristics of JFC01 scissor type vehicle seat was studied. The structural characteristics of the seat suspension, influence factors of vibration characteristics and research methods of seat vibration reduction performance were summarized. A method for analyzing the vibration characteristics of the scissor type seat was presented. The motion differential equation of seat suspension system was derived by mechanical analysis. A simplified single degree of freedom model for driver seat suspension was obtained. The influences of damper inclination angle, location of spring, length and inclination angle of scissor linkage on the vibration reduction of the seat suspension were analyzed by numerical simulation method. The results indicate that the influence of damper inclination on seat vibration damping performance is obvious. With the decrease of damper inclination angle, the vibration reduction capacity of the seat in the vibration isolation zone is enhanced, but the peak frequency and amplitude in the vibration amplifying zone are increased. The spring location, scissor linkage length and inclination angle changes in the seat size range have little effect on the seat vibration characteristics. The model can provide a basis for structural performance optimization of the scissor type seat.

Key words: scissor type seat; structural parameters; vibration characteristics