Positioning drive especially for use in machine tools as well as a tool head with such a positioning drive

摘要

The positioning drive has a gearbox (18) that can move relative to the housing (12) to adjust the cutter (76) or tool holder, driven by a motor (24) via a power supply (26). Within the housing is a hollow shaft (50) coupled to the gearbox. The shaft rotates but cannot slide and the gearbox slides relative to it. The motor is actually in two sections around the periphery of the shaft, driving it with gears (62,70). The hollow shaft has an inner thread engaging an outer thread on the gearbox. The electric motors use numerical control and are either stepping motors or servomotors.