Rolling gear apparatus for an involute tooth gear cutting machine

A rolling-gear apparatus for an involute-tooth gear cutting machine, the machine including an engine bed, comprising:

• a primary carriage longitudinally movable in both directions along a movable path I in a first guideway formed on the engine bed;
• a secondary carriage longitudinally movable in both directions along a movement path II in a second guideway formed on the primary carriage, the movement path II being at an oblique angle relative to the path I;
• a crank element connected to the secondary carriage and glidingly movable in a third guideway, the third guideway being angularly adjustable relative to the engine bed;
• a roll-circle member carried by the primary carriage and connected to a working-part table for co-rotation therewith, the roll-circle member being rotatably connected to the secondary carriage through a band-drive;
• and
• drive means connected to at least one of the primary carriage, the secondary carriage and the working-part table for driving the same in their respective translational and rotational movements.