Supporting force loading and adjusting mechanism for lower limb exoskeleton robot

The invention discloses a supporting force loading and adjusting mechanism for a passive lower limb exoskeleton robot, and relates to the technical field of exoskeleton robots. The supporting force loading and adjusting mechanism comprises a left lower limb exoskeleton, a right lower limb exoskeleton, a man-machine fixing bandage and a control unit, wherein the left lower limb exoskeleton and the right lower limb exoskeleton are symmetrically arranged, the left lower limb exoskeleton and the right lower limb exoskeleton can be worn on lower limbs of a human body through using the man-machine fixing bandage, the left lower limb exoskeleton comprises a thigh part, a knee joint and a shank part, and the thigh part rotates around the knee joint relative to the shank part. According to the supporting force loading and adjusting mechanism, loading and unloading states can be automatically switched according to human body motion information, the supporting force of the exoskeletons are adjusted according to differen