| 摘要 |
A gauging or measuring head for checking linear dimensions of mechanical pieces includes a casing (1), a movable arm (4) carrying a feeler (7), a fulcrum (10), coupled to the casing and the arm for enabling arm displacements with respect to the casing, a retraction device (68) with a cylinder (70) coupled to the casing and a piston (72) which slides therein for urging the arm to a definite inoperative position, and a position transducer (50) that provides signals depending on the position of the arm with respect to the casing. The retraction device includes a bellows gasket (88), which is housed in the cylinder and has its ends fixed to the cylinder and the piston. |
