Patent ID: 6142030
Filing Date: 2000-11-07
Classification: B23Q,F16H,Y10S,Y10T

Abstract:
An actuator comprising:a frame extending linearly for a predetermined length;a table block for displacement in an axial direction of said frame in response to operation of a rotating drive source;a ball screw for transmitting drive forces from said rotating drive source to said table block;a drive control block disposed on one end of said ball screw for controlling said drive forces transmitted from said rotating drive source to said ball screw; anda cylinder disposed axially parallel to said ball screw, said cylinder having a piston coupled to said table block, wherein said cylinder is disposed axially inside said frame and comprises a cylinder tube and a piston having a magnet displaceable in said cylinder tube, said table block includes a surface supporting another magnet thereon, and said piston is coupled to said table block through a magnetic coupling between respective magnets of said piston and said table block.