Patent ID: 8491250

Claim:
A palletizing robot, comprising: a lifting frame; an extensible mechanical arm rotatably connected to the lifting frame; an end-effector located on an end of the extensible mechanical arm; and a balancing mechanism comprising a threaded rod located on the extensible mechanical arm, a sliding member received on the threaded rod, a driving member fixed on an end of the threaded rod, a counterweight fixed on the sliding member, and a pair of guide rails substantially parallel to each other and fixed on the extensible mechanical arm, wherein the driving member drives the threaded rod to rotate such that the sliding member slides relative to the threaded rod, and the sliding member comprises a connecting block, two sliding blocks fixed on opposite ends of the connecting block, and a threaded fastener fixed in a middle portion of the connecting block between the two sliding blocks, the threaded fastener engages with the threaded rod, the two sliding blocks is capable of sliding relative to the pair of guide rails, and the counterweight is fixed on the connecting block, such that the counterweight is capable of sliding relative to the extensible mechanical arm.