Abstract: A first link member 4 is swingably connected to the base member 2 on a forward side, and a second link member 5 is swingably connected to the base member 2 on a backward side. A third link member 6 is swingably connected to the output member 3 on the forward side, and a fourth link member 7 is swingably connected to the output member 3 on the backward side. A swinging end of the third link member 6 is swingably connected to the first link member 4 on a first connecting axis J5, and a swinging end of the fourth link member 7 on the backward side is swingably connected to the first link member 4 on a second connecting axis J6. A swinging end of the second link member 5 is swingably connected to the fourth link member 7 on a third connecting axis J7.

Abstract: A non-motorized tricycle including: a animal imitating shell for supporting a rider; two front wheels and one rear wheel; a steering means pivotally supported by frame; A pedal-crank provided with a pedal linked to a driving-crank by a transmitting-rod; a long-arm crank secured to a driving-crank at one end and pivoted with a kicking-rod at other end; a one-way driving-wheel provided at lower end of the kicking-rod. While a rider pedals down pedals, the kicking-rod would kick backward and push the vehicle to move forward.