Limb assisting device for exoskeleton robot

The limb auxiliary device for the exoskeleton robot comprises a support, a base and a movable rod, the movable rod can be driven to slide in a function cavity in the set direction, and the outer connecting end of the movable rod is connected with the support through a ball hinge joint; the energy recovery assembly comprises a permanent magnet, a power generation coil and a storage battery, the power generation coil is electrically connected with the storage battery, the permanent magnet is fixed to the inner connecting end of the movable rod, the power generation coil is fixed in the functional cavity, and the power generation coil wraps the movable rod in the sliding direction. When the movable rod is driven to slide in the functional cavity, the movable rod drives the permanent magnet to reciprocate in the inner cavity of the power generation coil so as to convert mechanical energy into electric energy; the structure is suitable for stress in any direction, mechanical energy is converted into electric energ