Patent ID: 6955583

Claim:
An apparatus for the diameter checking of a substantially cylindrical eccentric portion of a mechanical piece that defines a geometrical axis, during eccentric rotations of said portion about said geometrical axis, including a substantially Vee-shaped reference device adapted for cooperating with said eccentric portion to be checked, a measuring device, movable with the substantially Vee-shaped reference device, and a support device for supporting the substantially Vee-shaped reference device and the measuring device, the support device including a support element, a first rotating, coupling element coupled to the support element so as to rotate about an axis of rotation parallel to said geometrical axis, a second rotating, coupling element that carries the substantially Vee-shaped reference device and the measuring device and is coupled to the first coupling element so as to rotate relative to it about an additional axis of rotation parallel to said geometrical axis and to said axis of rotation, limiting and reference devices with a first pair and a second pair of abutment surfaces urged to cooperate with each other for limiting the rotations of said first rotating, coupling element and said second rotating, coupling element and for defining a rest condition of the apparatus without interfering with displacements of the substantially Vee-shaped reference device following the substantially cylindrical portion during said eccentric rotations, and a thrust device for urging said substantially Vee-shaped reference device in abutment with the cylindrical eccentric portion to be checked and keeping the substantially Vee-shaped reference device engaged with the cylindrical eccentric portion during said eccentric rotations, the thrust device being arranged between the support element and one of said first and second coupling elements, the abutment surfaces of said first pair and second pair being arranged so that they get detached from each other when the substantially Vee-shaped reference device cooperates with the eccentric portion to be checked.