Patent ID: 8069746

Claim:
An auxiliary device for a mechanical arm comprising: a supporting base comprising a supporting plate, a cylindrical seat, and a fulcrum arm, the supporting plate being fixed to the mechanical arm, the cylindrical seat and the fulcrum arm being fixed to a surface of the supporting plate opposing the mechanical arm; a reciprocating engine comprising a cylinder and a driving rod, the cylinder being configured for driving the driving rod linearly and reciprocating along the longitudinal axis of the driving rod, the cylinder being rotatably received in the cylindrical seat of the supporting base, thereby defining a first rotational axis between the cylinder and the supporting base; a rotational plate, to which the driving rod is rotatably fixed, thereby defining a second rotational axis therebetween, the rotational plate being further directly and rotatably fixed to the fulcrum arm of the supporting base to be rotatable about a third rotational axis defined between the rotational plate and the supporting base, wherein the first, second, and third rotational axes are parallel; and a suction member fixed to the rotational plate.