INSTRUMENT FOR CHECKING LINE OF CONTACT OF SPUR GEARS FOR STRAIGHTNESS AND NOMINAL DIRECTION

摘要

Method and apparatus for checking the line of contact of helical gears in which a measuring carriage with a tangential measuring instrument acts on a measuring head, when the carriage is moving along a guide, to move the head through an angle equal to the spiral angle on the pitch cylinder of the gear being measured. The apparatus also comprises a removable blade for determining the point on the edge of the tangential measuring instrument which contacts the line of contact at the pitch cylinder of the gear.