STEPPING LINEAR AIR MOTOR

摘要

PROBLEM TO BE SOLVED: To provide a stepping air motor type linearly moving device, for quickly and correctly moving an antenna or an electric field sensor and performing automatic measurement without electric wave disturbance in a space to be measured in an electric wave measuring environment. SOLUTION: A stepping linear air motor comprises: a fixed member 1 supported by a fixed member support body 2; and a movable member 3 guided by the fixed member 1 when it moves. The fixed member 1 has both sides with guide recess grooves 6 for guiding the movable member, and a rack gear 4 having upper and lower parts with symmetric tooth forms. The movable member 3 has a cavity therein, an arbitrary number of expanding and contracting tubes 8 are disposed to upper and lower parts of the cavity so that the tubes 8 are in parallel with the tooth forms of the rack gear 4 disposed to the fixed member 1, and are different in pitch from each other. The movable member 3 further has protruding strips disposed on both sides of the cavity to move and slide along the guide recess grooves 6 on a fixed member 1 side. The tubes 8 are connected with a pneumatic pulse source through intake/exhaust pipes 9 to sequentially send the pneumatic pulses to the tubes 8 and thereby to intermittently move the movable member. COPYRIGHT: (C)2005,JPO&NCIPI