Patent ID: 7020974

Claim:
An apparatus for checking dimensional and geometric features of a pin, rotating about a geometric axis of rotation, with a Vee-shaped reference device that defines rest and reference surfaces adapted for cooperating with the pin to be checked, a gauging device, coupled to the Vee-shaped reference device and including a feeler adapted for contacting the surface of the pin to be checked and for performing linear displacements along a measurement direction lying between said rest and reference surfaces of the Vee-shaped reference device, a support device for supporting the Vee-shaped reference device and the gauging device, with a stationary support element and a coupling mechanism, between the stationary support element and the Vee-shaped reference device, adapted for enabling, when the apparatus is in a working condition, substantially translation displacements of the Vee-shaped reference device with respect to the stationary support element, the coupling mechanism including: a first section coupled to the stationary support element, an intermediate element coupled to the first section, and a second section coupled to the intermediate element and carrying the Vee-shaped reference device and the gauging device, at least one of said first and second sections including, in said working condition, a first substantially parallelogram structure with four fulcra that define as many axes of rotation parallel to said geometric axis of rotation and coupling and limiting elements adapted for defining and setting a distance separating adjacent axes of rotation, said first substantially parallelogram structure including at least one pair of mechanical abutments adapted for holding mutual contact in said working condition for defining and setting the distance separating two adjacent axes of rotation, and for remaining mutually separate in said rest position of the apparatus, and a control device for enabling the apparatus to displace in an automatic way from a rest position to said working condition, and vice versa.