| 摘要 |
<p>A gauging or measuring head for the linear dimension checking of mechanical pieces including a casing, an arm carrying a feeler for contacting a piece to be checked, a fulcrum, for enabling displacements of the arm with respect to the casing, a return spring for maintaining the feeler in contact with the piece in the course of the checking, a position transducer for providing signals indicative of the position of the arm with respect to the casing, and a damping arrangement, for damping the angular displacements of the arm about the fulcrum, thus slowing down its speed. The damping arrangement includes a sealingly closed chamber that is filled with viscous fluid and houses damping surfaces associated to the arm.The viscous fluid is a synthetic base fluid, or a composition of fluids, that does not include organic-siliceous derivatives and has biodegradability characteristics.</p> |
