Background: Shock absorbers are the main damping component of vehicle suspension system,
whose excellent passive characteristics can greatly improve and guarantee the ride comfort and handling
stability of vehicles. Therefore, it is of great significance to research and develop a shock absorber with
excellent passive characteristics.
Objective: The purpose of this paper is to propose and design a bionic three-link tube shock absorber with
good buffering and vibration reduction performance and bionic adaptive characteristics. In addition, the
passive characteristics of the purposed shock absorber are studied.
Methods: The bionics idea is applied to the development of vehicle shock absorbers. A three-link mechanism
with dampers and springs is abstracted and designed according to the structure and the function of
kangaroo legs. A bionic three-link tube shock absorber is constructed based on the traditional tube shock
absorber structures and the three-link mechanism. Three-dimensional modeling and three-dimensional
dynamic simulation of the shock absorber are carried out by CATIA and ADAMS.
Results: The body acceleration are greatly reduced relative to excitations; the dynamic displacement decreases
sharply under greater excitation, but there is slight increase under smaller excitation; the motion
function and joint change characteristics of the proposed shock absorber are similar to those of kangaroo
legs to a certain degree.
Conclusion: The results show that the structure design of the bionic three-link tube shock absorber is
reasonable and workable, the shock absorber presents good buffering and damping performance and some
bionic adaptive characteristics, however, there is still room for further optimization of the structure design.