Patent ID: 6564466
Filing Date: 2003-05-20
Classification: F16H,G01B

Abstract:
A measuring apparatus for a pulley having a ball groove for a ball spline and a conical surface for varying a pulley width of the pulley, comprising:a workpiece holding post for rotatably holding the pulley about an axis of the pulley; a slide table slidable in a radial direction of the measuring apparatus; a measuring post slidably mounted on said table in a tangent direction orthogonal to the radial direction of the measuring apparatus; a detecting head slidably mounted on the measuring post in an axial direction orthogonal to both of the radial and tangent directions of the measuring apparatus, said detecting head having a probe including a ball of a specified diameter formed at the tip thereof; and a processor for controlling movements of said slide table, said measuring post and said detecting head, to allow said probe to be brought into contact with a portion of the pulley to be measured, and for measuring the configurations and the positional accuracy thereof based on displacement data detected by the detecting head, and wherein said processor measures an angle of intersection defined by intersecting a line connecting the center of an ideal circle and one of the two contact points and a line connecting the center of the ideal circle and the center of a measuring reference of the pulley when an ideal circle of a specified diameter is brought into contact with the ball groove at two contact points.