Bionic tendon-bone synergetic rigid-flexible coupling sand-crossing mechanical foot

The invention discloses a bionic tendon-bone synergetic rigid-flexible coupling sand-crossing mechanical foot which comprises a foot body mechanism, a buffering and damping mechanism, a flexible passive control mechanism, a main toe and an auxiliary toe. The bionic tendon-bone synergetic rigid-flexible coupling sand-crossing mechanical foot takes examples from biological structure and assembling of the foot tendon-bone of an ostrich and the tendon-bone synergetic working principle, the buffering and damping mechanism can decrease the speed when the foot falls on the ground, and the impact on the ground is reduced; and under the effect of a flexible passive control system, the main toe and the auxiliary toe are open when falling on the ground, a torsion spring is compressed to store energy,the main toe and the auxiliary toe are closed when leaving the ground, and the torsion spring is bounced off to release the energy. According to the bionic tendon-bone synergetic rigid-flexible coupling sand-crossing mechani