Worktable for positioning workpieces in measuring devices to check dimensions

Claim 1

A worktable for positioning workpieces in measuring devices for checking linear dimensions, comprising: a lower plate forming a base and mounted in a measuring device; an intermediate plate mounted on said base; an upper plate mounted on said intermediate plate for carrying the workpiece to be checked; coupling means interconnecting said plates; a mechanism for precise adjustment of said intermediate plate together with said upper plate in the horizontal plane along a first coordinate axis; a mechanism for precise adjustment of said upper plate in the horizontal plane along a second coordinate axis perpendicular to said first coordinate axis; a mechanism for precise inclination of said intermediate plate together with said upper plate in a first vertical plane; a mechanism for precise inclination of said upper plate in another vertical plane perpendicular to said first vertical plane; first ball supports located between said base and intermediate plates and forming two rectilinear guides with balls confined between them, said guides being located at both sides of the worktable center and parallel to each other for allowing adjustment of said intermediate plate together with said upper plate in the horizontal plane along said first co-ordinate axis by means of said mechanism for precise adjustment of the intermediate plate together with the upper plate one of said guides being adjustable in the vertical plane perpendicular to said guides by means of said mechanism for precise inclination of the intermediate plate together with the upper plate so as to turn said plates about balls of the other guide on said base and said intermediate plate; second ball supports located between said upper and intermediate plates and forming two rectilinear guides with balls confined between them, said guides being located at both sides of the worktable center parallel to each other and perpendicular to said guides on the intermediate plate and the base for allowing adjustment of said upper plate in the horizontal plane along said second co-ordinate axis by means of said mechanism for precise adjustment of the upper plate, one of said last-mentioned guides being adjustable in the vertical plane perpendicular to said last-mentioned guides by means of said mechanism for precise inclination of the upper plate so as to turn the latter about balls of the other guide on said upper and intermediate plates.