The invention discloses an
upper limb rehabilitation mechanical arm capable of changing the shoulder center. The
upper limb rehabilitation mechanical arm comprises a base, a supporting frame, a
shoulder joint, a shoulder motor, a shoulder connecting rod, a 3-DOF parallel hydraulic platform, a big arm connecting rod, a big arm, an
elbow joint and a
wrist joint, and the
shoulder joint comprises a
transverse beam and a rotary shaft; the shoulder motor comprises a motor, a fixed base and a
bevel gear; the 3-DOF parallel hydraulic platform comprises an upper bottom plate, three telescopic hydrauliccylinders and a lower bottom plate; the big arm comprises a holder, a driving motor, an upper connecting plate and a rotating shaft; the
elbow joint comprises a small driving motor, a big driving motor, a small holder, a large holder and a lower connecting plate; the
wrist joint comprises a driving motor, a holder, a
wrist baffle, a belt
pulley, a wrist connecting rod, a bolt connecting rod and abolt. According to the
upper limb rehabilitation mechanical arm, the shoulder center can be changed so that the
shoulder joint can move in any direction no matter where the big arm and the
forearm ofthe arm are, and the
upper limb rehabilitation mechanical arm has the advantages of being compact in structure, high in practicability and the like.