Peritrochoid curved surface generating apparatus

A peritrochoid curve surface generating apparatus comprising an outer cylinder rotatably supported by a frame on a base and formed in its upper end with an eccentric opening, an inner cylinder formed with an eccentric opening eccentric to its axis and accommodated within and fixed to said eccentric opening of said outer cylinder in an adjustable angular relationship therebetween, the outer cylinder defining a base circle and the inner cylinder defining a rolling circle for the peritroichoidal curved surface, each of said base and rolling circles having a radius, rotation of the inner cylinder relative to the outer cylinder changing a difference between radii of the base and rolling circles for the peritrochoid curved surface to vary its characteristic, clamping means for clamping said inner cylinder to said outer cylinder, a first central shaft rotatably journaled in an axis of said outer cylinder, an inner cylinder central shaft rotatably journaled in an axis of said inner cylinder, a second central shaft rotatably journaled in said eccentric opening of said inner cylinder, a work table fixed to an upper end of said second central shaft, a gear train for transmitting a rotation of said first central shaft to said second central shaft through said inner cylinder central shaft, rocking means rockable within a predetermined angle about a predetermined point, a cylindrical tool rotatable about its axis and mounted on said rocking means, the circumference of said tool being in contact with the rocking axis of said rocking means, and means for driving said outer cylinder and said inner cylinder in a determined geared relation and rocking said rocking means in a geared relation to the rotation of said outer cylinder.