The invention discloses a sea lion front fin simulating device capable of actively deforming, which belongs to the technical field of
underwater navigation equipment and comprises N joint skeleton mechanisms, a driving connecting rod, a supporting shell, a bionic flexible outer
skin and a driving unit. The joint framework mechanism comprises a shin rod, a supporting rod, a
crank, a first fixing pin shaft, a second fixing pin shaft and a sliding pin shaft, and a plane connecting rod mechanism is formed. One end of the shank rod is connected with the supporting rod through a first fixing pin shaft, the other end of the supporting rod is connected with the
crank through a second fixing pin shaft, and the other end of the
crank is connected with a sliding pin shaft and can slide along the shank rod. And a driving connecting rod is connected between the sliding pin shafts of the adjacent joint framework mechanisms. The supporting shell is fixed to the shin rod to form supporting face bodies located on the two sides of the first fixing pin shaft, and the bionic flexible outer
skin is installed on the supporting face bodies to form a fin-shaped surface. The driving unit is connected to the shin rod and drives the shin rod to swing around the first fixing pin shaft. Through spanwise active deformation, flexible
skin hydrodynamic characteristics, a multi-joint bionic structure and rigid-flexible combined design, the propulsion efficiency and adaptability of the
underwater robot are remarkably improved.